add engine version

29 files changed, 9515 insertions, 0 deletions

diff --git a/engine-ocean/Graphics/GLWrappers/shader.cpp b/engine-ocean/Graphics/GLWrappers/shader.cpp
new file mode 100644
index 0000000..4ae1aa2
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/shader.cpp
@@ -0,0 +1,121 @@
+#include "shader.h"
+
+Shader::Shader(std::vector<GLenum> shaderTypes, std::vector<const char*> filepaths){
+    m_handle = ShaderLoader::createShaderProgram(shaderTypes, filepaths);
+}
+
+Shader::~Shader(){
+    glDeleteProgram(m_handle);
+}
+
+void Shader::bind(){
+    glUseProgram(m_handle);
+}
+
+void Shader::unbind(){
+    glUseProgram(0);
+}
+
+GLuint Shader::getHandle(){
+    return m_handle;
+}
+
+void Shader::setMaterial(std::shared_ptr<Material> material){
+    ColorSource color_source = material->getColorSource();
+    switch(color_source){
+        case ColorSource::SOLID_COLOR:
+            glUniform1i(glGetUniformLocation(m_handle, "colorSource"), 0);
+            glUniform3f(glGetUniformLocation(m_handle, "objColor"), material->getColor().r, material->getColor().g, material->getColor().b);
+            break;
+        case ColorSource::TEXTURE_COLOR:
+            glUniform1i(glGetUniformLocation(m_handle, "colorSource"), 1);
+            material->getTexture()->bind();
+            glUniform1i(glGetUniformLocation(m_handle, "objTexture"), material->getTexture()->getTexUnitUint());
+            break;
+        case ColorSource::PER_VERTEX_COLOR:
+            glUniform1i(glGetUniformLocation(m_handle, "colorSource"), 2);
+            break;
+    }
+    float shininess = material->getShininess();
+    glUniform1f(glGetUniformLocation(m_handle, "shininess"), shininess);
+}
+
+void Shader::setCamera(std::shared_ptr<Camera> camera){
+    glUniformMatrix4fv(glGetUniformLocation(m_handle, "view"), 1, GL_FALSE, glm::value_ptr(camera->getView()[0]));
+    glUniformMatrix4fv(glGetUniformLocation(m_handle, "projection"), 1, GL_FALSE, glm::value_ptr(camera->getProjection()[0]));
+    glUniform3f(glGetUniformLocation(m_handle, "worldSpace_camPos"), camera->getPos().x, camera->getPos().y, camera->getPos().z);
+    glUniform3f(glGetUniformLocation(m_handle, "skyColor"), 1.f, 1.f, 1.f);
+
+}
+
+void Shader::setModelTransform(std::shared_ptr<ModelTransform> modelTransform){
+    glUniformMatrix4fv(glGetUniformLocation(m_handle, "model"), 1, GL_FALSE, glm::value_ptr(modelTransform->getModelMatrix()[0]));
+}
+
+void Shader::setModelTransform(glm::mat4 modelMatrix){
+    glUniformMatrix4fv(glGetUniformLocation(m_handle, "model"), 1, GL_FALSE, glm::value_ptr(modelMatrix));
+}
+
+void Shader::setGlobalCoeffs(glm::vec3 coeffs){
+    glUniform3f(glGetUniformLocation(m_handle, "coeffs"), coeffs.x, coeffs.y, coeffs.z);
+}
+
+void Shader::setLights(std::vector<std::shared_ptr<Light>> lights){
+    int numLights = std::min(int(lights.size()), 16);
+    std::vector<int> lightType;
+    std::vector<float> lightColor;
+    std::vector<float> lightFunction;
+    std::vector<float> worldSpace_lightPos;
+    std::vector<float> worldSpace_lightDir;
+    lightType.resize(numLights);
+    lightColor.resize(numLights*3);
+    lightFunction.resize(numLights*3);
+    worldSpace_lightPos.resize(numLights*3);
+    worldSpace_lightDir.resize(numLights*3);
+    for(int i = 0; i<numLights; i++){
+        lightColor[i*3] = lights[i]->getColor().r;
+        lightColor[i*3+1] = lights[i]->getColor().g;
+        lightColor[i*3+2] = lights[i]->getColor().b;
+        glm::vec3 camLightData;
+        switch(lights[i]->getType()){
+            case LightType::POINT:
+                lightType[i] = 0;
+                lightFunction[i*3] = lights[i]->getAttenuation().x;
+                lightFunction[i*3+1] = lights[i]->getAttenuation().y;
+                lightFunction[i*3+2] = lights[i]->getAttenuation().z;
+                worldSpace_lightPos[i*3] = lights[i]->getPos().x;
+                worldSpace_lightPos[i*3+1] = lights[i]->getPos().y;
+                worldSpace_lightPos[i*3+2] = lights[i]->getPos().z;
+                break;
+            case LightType::DIRECTIONAL:
+                lightType[i] = 1;
+                worldSpace_lightDir[i*3] = lights[i]->getDir().x;
+                worldSpace_lightDir[i*3+1] = lights[i]->getDir().y;
+                worldSpace_lightDir[i*3+2] = lights[i]->getDir().z;
+                break;
+        }
+    }
+    glUniform1i(glGetUniformLocation(m_handle, "numLights"), numLights);
+    Debug::checkGLError();
+    glUniform1iv(glGetUniformLocation(m_handle, "lightType"), numLights, lightType.data());
+    Debug::checkGLError();
+    glUniform3fv(glGetUniformLocation(m_handle, "lightColor"), numLights, lightColor.data());
+    Debug::checkGLError();
+    glUniform3fv(glGetUniformLocation(m_handle, "lightFunction"), numLights, lightFunction.data());
+    Debug::checkGLError();
+    glUniform3fv(glGetUniformLocation(m_handle, "worldSpace_lightPos"), numLights, worldSpace_lightPos.data());
+    Debug::checkGLError();
+    std::cout<<worldSpace_lightDir[0]<<std::endl;
+    glUniform3fv(glGetUniformLocation(m_handle, "worldSpace_lightDir"), numLights, worldSpace_lightDir.data());
+    Debug::checkGLError();
+}
+
+void Shader::clearLights(){
+    glUniform1i(glGetUniformLocation(m_handle, "numLights"), 0);
+}
+
+void Shader::setTextUniforms(float screenWidth, float screenHeight, glm::vec3 color){
+    glm::mat4 projection = glm::ortho(0.0f, screenWidth, 0.0f, screenHeight);
+    glUniformMatrix4fv(glGetUniformLocation(m_handle, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
+    glUniform3f(glGetUniformLocation(m_handle, "textColor"), color.r, color.g, color.b);
+}
diff --git a/engine-ocean/Graphics/GLWrappers/shader.h b/engine-ocean/Graphics/GLWrappers/shader.h
new file mode 100644
index 0000000..da0ae5d
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/shader.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include "../shaderloader.h"
+#include "../camera.h"
+#include "../material.h"
+#include "../modeltransform.h"
+#include "../light.h"
+
+class Shader{
+public:
+    Shader(std::vector<GLenum> shaderTypes, std::vector<const char*> filepaths);
+    ~Shader();
+
+    void bind();
+    void unbind();
+    GLuint getHandle();
+    void setMaterial(std::shared_ptr<Material> material);
+    void setCamera(std::shared_ptr<Camera> camera);
+    void setModelTransform(std::shared_ptr<ModelTransform> modelTransform);
+    void setModelTransform(glm::mat4 modelMatrix);
+    void setGlobalCoeffs(glm::vec3 coeffs);
+    void setLights(std::vector<std::shared_ptr<Light>> lights);
+    void clearLights();
+    void setTextUniforms(float screenWidth, float screenHeight, glm::vec3 color);
+
+private:
+    GLuint m_handle;
+};
diff --git a/engine-ocean/Graphics/GLWrappers/texture.cpp b/engine-ocean/Graphics/GLWrappers/texture.cpp
new file mode 100644
index 0000000..1c76165
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/texture.cpp
@@ -0,0 +1,91 @@
+#include "texture.h"
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
+#include <iostream>
+
+#include "../debug.h"
+
+Texture::Texture(int width, int height, GLenum texUnit, GLint internalFormat, GLenum texTarget):
+    m_texTarget(texTarget),
+    m_texUnit(texUnit)
+{
+    glGenTextures(1, &m_handle);
+    bind();
+    glTexParameteri(m_texTarget, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(m_texTarget, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(m_texTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+    glTexParameteri(m_texTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+    glTexImage2D(m_texTarget, 0, internalFormat, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+    m_height = height;
+    m_width = width;
+    unbind();
+}
+
+Texture::Texture(std::string filepath, GLenum texUnit, GLint internalFormat, GLenum texTarget):
+    m_texTarget(texTarget),
+    m_texUnit(texUnit)
+{
+    glGenTextures(1, &m_handle);
+    bind();
+    glTexParameteri(m_texTarget, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(m_texTarget, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(m_texTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(m_texTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    stbi_set_flip_vertically_on_load(1);
+    int width, height, numChannels;
+    unsigned char* data = stbi_load(filepath.c_str(), &width, &height, &numChannels, 4);
+    if (stbi_failure_reason()){
+        std::cout << stbi_failure_reason() << std::endl;
+    }
+    glTexImage2D(m_texTarget, 0, internalFormat, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+    m_height = height;
+    m_width = width;
+    stbi_image_free(data);
+    unbind();
+}
+
+Texture::~Texture(){
+    glDeleteTextures(1, &m_handle);
+}
+
+void Texture::bind(){
+    glActiveTexture(m_texUnit);
+    glBindTexture(m_texTarget, m_handle);
+}
+
+void Texture::bind(GLenum texUnit){
+    glActiveTexture(texUnit);
+    glBindTexture(m_texTarget, m_handle);
+}
+
+void Texture::unbind(){
+    glActiveTexture(m_texUnit);
+    glBindTexture(m_texTarget, 0);
+}
+
+void Texture::unbind(GLenum texUnit){
+    glActiveTexture(texUnit);
+    glBindTexture(m_texTarget, 0);
+}
+
+GLuint Texture::getHandle(){
+    return m_handle;
+}
+
+GLuint Texture::getTexUnitUint(){
+    return GLuint(m_texUnit) - GLuint(GL_TEXTURE0);
+}
+
+GLenum Texture::getTexUnitEnum(){
+    return m_texUnit;
+}
+
+int Texture::getWidth(){
+    return m_width;
+}
+
+int Texture::getHeight(){
+    return m_width;
+}
diff --git a/engine-ocean/Graphics/GLWrappers/texture.h b/engine-ocean/Graphics/GLWrappers/texture.h
new file mode 100644
index 0000000..3ad2f13
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/texture.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "GL/glew.h"
+#include <string>
+
+#include "glm/glm.hpp"
+
+class Texture
+{
+public:
+    Texture(int width, int height, GLenum texUnit = GL_TEXTURE0, GLint internalFormat = GL_RGBA, GLenum texTarget = GL_TEXTURE_2D);
+    Texture(std::string filePath, GLenum texUnit = GL_TEXTURE0, GLint internalFormat = GL_RGBA, GLenum texTarget = GL_TEXTURE_2D);
+    ~Texture();
+
+    void bind();
+    void bind(GLenum texUnit);
+    void unbind();
+    void unbind(GLenum texUnit);
+    GLuint getHandle();
+    GLuint getTexUnitUint();
+    GLenum getTexUnitEnum();
+    int getWidth();
+    int getHeight();
+
+private:
+    GLuint m_handle;
+    GLenum m_texUnit;
+    GLenum m_texTarget;
+    int m_width;
+    int m_height;
+};
diff --git a/engine-ocean/Graphics/GLWrappers/vao.cpp b/engine-ocean/Graphics/GLWrappers/vao.cpp
new file mode 100644
index 0000000..43a1062
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/vao.cpp
@@ -0,0 +1,68 @@
+#include "vao.h"
+#include <iostream>
+
+VAO::VAO(std::shared_ptr<VBO> vbo, VAOAttrib attribs):
+    m_vbo(vbo),
+    m_curr_offset(0),
+    m_vert_size(0)
+{
+    glGenVertexArrays(1, &m_handle);
+    bind();
+
+    if(attribs & VAOAttrib::POS){
+        m_vert_size += 3;
+    }
+    if(attribs & VAOAttrib::NORM){
+        m_vert_size += 3;
+    }
+    if(attribs & VAOAttrib::UV){
+        m_vert_size += 2;
+    }
+    if(attribs & VAOAttrib::COLOR){
+        m_vert_size += 3;
+    }
+    
+
+    //Attach layout to vbo depending on which of the above attributes it has
+    m_vbo->bind();
+
+    if(attribs & VAOAttrib::POS){
+        addAttribute(0, 3);
+    }
+    if(attribs & VAOAttrib::NORM){
+        addAttribute(1, 3);
+    }
+    if(attribs & VAOAttrib::UV){
+        addAttribute(2, 2);
+    }
+    if(attribs & VAOAttrib::COLOR){
+        addAttribute(3, 3);
+    }
+
+    m_vbo->unbind();
+    unbind();
+}
+
+VAO::~VAO(){
+    glDeleteVertexArrays(1, &m_handle);
+}
+
+void VAO::bind(){
+    glBindVertexArray(m_handle);
+}
+
+void VAO::unbind(){
+    glBindVertexArray(0);
+}
+
+void VAO::draw(){
+    bind();
+    glDrawArrays(GL_TRIANGLES, 0, m_vbo->getLength()/m_vert_size);
+    unbind();
+}
+
+void VAO::addAttribute(GLuint attrib_index, GLint attrib_size){
+    glEnableVertexAttribArray(attrib_index);
+    glVertexAttribPointer(attrib_index, attrib_size, GL_FLOAT, GL_FALSE, m_vert_size*sizeof(GLfloat), reinterpret_cast<void*>(m_curr_offset*sizeof(GLfloat)));
+    m_curr_offset += attrib_size;
+}
\ No newline at end of file
diff --git a/engine-ocean/Graphics/GLWrappers/vao.h b/engine-ocean/Graphics/GLWrappers/vao.h
new file mode 100644
index 0000000..8f9bc6a
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/vao.h
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "vbo.h"
+#include <memory>
+
+enum class VAOAttrib{
+    POS = 1,
+    NORM = 2,
+    UV = 4,
+    COLOR = 8
+};
+
+inline VAOAttrib operator|(VAOAttrib lhs, VAOAttrib rhs){
+    using VAOAttribType = std::underlying_type<VAOAttrib>::type;
+    return VAOAttrib(static_cast<VAOAttribType>(lhs) | static_cast<VAOAttribType>(rhs));
+}
+
+inline bool operator&(VAOAttrib lhs, VAOAttrib rhs){
+    using VAOAttribType = std::underlying_type<VAOAttrib>::type;
+    return static_cast<bool>(VAOAttrib(static_cast<VAOAttribType>(lhs) & static_cast<VAOAttribType>(rhs)));
+}
+
+class VAO
+{
+public:
+    VAO(std::shared_ptr<VBO> vbo, VAOAttrib attribs);
+    ~VAO();
+
+    void bind();
+    void unbind();
+    
+    void draw();
+
+private:
+    void addAttribute(GLuint attrib_index, GLint attrib_size);
+
+    std::shared_ptr<VBO> m_vbo; 
+    GLuint m_handle;
+    GLint m_curr_offset;
+    GLuint m_vert_size;
+
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/GLWrappers/vbo.cpp b/engine-ocean/Graphics/GLWrappers/vbo.cpp
new file mode 100644
index 0000000..a8d08fb
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/vbo.cpp
@@ -0,0 +1,27 @@
+#include "vbo.h"
+#include <iostream>
+
+VBO::VBO(std::vector<float> data):
+    m_length(data.size())
+{
+    glGenBuffers(1, &m_handle);
+    bind();
+    glBufferData(GL_ARRAY_BUFFER, m_length*sizeof(float), data.data(), GL_STATIC_DRAW);
+    unbind();
+}
+
+VBO::~VBO(){
+    glDeleteBuffers(1, &m_handle);
+}
+
+void VBO::bind(){
+    glBindBuffer(GL_ARRAY_BUFFER, m_handle);
+}
+
+void VBO::unbind(){
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+}
+
+GLsizei VBO::getLength(){
+    return m_length;
+}
\ No newline at end of file
diff --git a/engine-ocean/Graphics/GLWrappers/vbo.h b/engine-ocean/Graphics/GLWrappers/vbo.h
new file mode 100644
index 0000000..bd63877
--- /dev/null
+++ b/engine-ocean/Graphics/GLWrappers/vbo.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <GL/glew.h>
+#include <vector>
+
+class VBO
+{
+public:
+    VBO(std::vector<float> data);
+    ~VBO();
+
+    void bind();
+    void unbind();
+    GLsizei getLength();
+
+private:
+    GLuint m_handle;
+    GLsizei m_length;
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/camera.cpp b/engine-ocean/Graphics/camera.cpp
new file mode 100644
index 0000000..0a5fd9d
--- /dev/null
+++ b/engine-ocean/Graphics/camera.cpp
@@ -0,0 +1,124 @@
+#include "camera.h"
+#include <iostream>
+
+Camera::Camera(int width, int height, glm::vec3 pos, glm::vec3 look, 
+    glm::vec3 up, float fov, float nearPlane, float farPlane):
+    m_width(width),
+    m_height(height),
+    m_pos(pos),
+    m_look(look),
+    m_up(up),
+    m_fov(fov),
+    m_aspect(width/float(height)),
+    m_near(nearPlane),
+    m_far(farPlane)
+{
+    calculateProjection();
+    calculateView();
+}
+
+Camera::~Camera(){
+    
+}
+
+glm::mat4 Camera::getProjection(){
+    return m_proj;
+}
+
+glm::mat4 Camera::getView(){
+    return m_view;
+}
+
+void Camera::resize(int width, int height){
+    m_width = width;
+    m_height = height;
+    m_aspect = float(width)/float(height);
+
+    calculateProjection();
+}
+
+void Camera::translate(glm::vec3 move){
+    m_pos += move;
+
+    calculateView();
+}
+
+void Camera::setPos(glm::vec3 newPos){
+    m_pos = newPos;
+
+    calculateView();
+}
+
+glm::vec3 Camera::getPos(){
+    return m_pos;
+}
+
+void Camera::rotate(float angle, glm::vec3 axis){
+    glm::mat4 lookRotation = glm::rotate(glm::mat4(1), angle, axis);
+    glm::vec3 tempLook = glm::vec3(lookRotation * glm::vec4(m_look, 0));
+    if(glm::cross(tempLook, m_up) != glm::vec3(0)){
+        m_look = tempLook;
+       calculateView();
+    }
+}
+
+void Camera::setLook(glm::vec3 newLook){
+//    std::cout << "up: " << m_up.x << "," << m_up.y << "," << m_up.z << std::endl;
+//    std::cout << "look: " << newLook.x << "," << newLook.y << "," << newLook.z << std::endl;
+    if(glm::cross(newLook, m_up) == glm::vec3(0)){
+        std::cout<<"Error: Look vector cannot be parallel to up vector!"<<std::endl;
+        return;
+    }
+    m_look = newLook;
+
+    calculateView();
+}
+
+glm::vec3 Camera::getLook(){
+    return m_look;
+}
+
+void Camera::setUp(glm::vec3 newUp){
+    if(glm::cross(newUp, m_look) == glm::vec3(0)){
+        std::cout<<"Error: Up vector cannot be parallel to look vector!"<<std::endl;
+        return;
+    }
+    m_up = newUp;
+
+    calculateView();
+}
+
+glm::vec3 Camera::getUp(){
+    return m_up;
+}
+
+void Camera::calculateProjection(){
+    m_proj = glm::perspective(m_fov, m_aspect, m_near, m_far);
+}
+
+void Camera::calculateView(){
+    // eye, lookat, up
+    m_view = glm::lookAt(m_pos, m_look, m_up);
+}
+
+//
+
+glm::vec3 Camera::getViewDirection(){
+    return -glm::transpose(m_view)[2];
+}
+
+glm::vec3 Camera::getRight(){
+    return glm::transpose(m_view)[0];
+}
+
+glm::vec3 Camera::getLookAt(){
+    return m_look;
+}
+
+int Camera::getWidth(){
+    return m_width;
+}
+
+int Camera::getHeight(){
+    return m_height;
+}
diff --git a/engine-ocean/Graphics/camera.h b/engine-ocean/Graphics/camera.h
new file mode 100644
index 0000000..e23b0b1
--- /dev/null
+++ b/engine-ocean/Graphics/camera.h
@@ -0,0 +1,57 @@
+#pragma once
+
+#include "glm/glm.hpp"
+#include "glm/ext.hpp"
+
+class Camera
+{
+public:
+    Camera(int width = 640, int height = 480,
+    glm::vec3 pos = glm::vec3(0, 0, 0), glm::vec3 look = glm::vec3(0, 0, 1), 
+    glm::vec3 up = glm::vec3(0, 1, 0), float fov = 1.f, 
+    float nearPlane = 0.1f, float farPlane = 100.f);
+    ~Camera();
+
+    // Functions to get camera data for drawing
+    glm::mat4 getProjection();
+    glm::mat4 getView();
+
+    // Functions to edit camera
+    void resize(int width, int height);
+    void translate(glm::vec3 move);
+    void setPos(glm::vec3 newPos);
+    glm::vec3 getPos();
+    void rotate(float angle, glm::vec3 axis);
+    void setLook(glm::vec3 newLook);
+    glm::vec3 getLook();
+    void setUp(glm::vec3 newUp);
+    glm::vec3 getUp();
+
+    glm::vec3 getLookAt();
+    glm::vec3 getViewDirection();
+    glm::vec3 getRight();
+
+
+    int getHeight();
+    int getWidth();
+
+
+
+private:
+    // Internal functions to update projection and view matrices
+    void calculateProjection();
+    void calculateView();
+
+    int m_width;
+    int m_height;
+    glm::vec3 m_pos;
+    glm::vec3 m_look;
+    glm::vec3 m_up;
+    float m_fov;
+    float m_aspect;
+    float m_near;
+    float m_far;
+
+    glm::mat4 m_proj = glm::mat4(1);
+    glm::mat4 m_view = glm::mat4(1);
+};
diff --git a/engine-ocean/Graphics/debug.h b/engine-ocean/Graphics/debug.h
new file mode 100644
index 0000000..6d2be6c
--- /dev/null
+++ b/engine-ocean/Graphics/debug.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <GL/glew.h>
+
+#include <iostream>
+
+namespace Debug{
+    inline GLenum checkGLError(const char *file, int line)
+    {
+        GLenum errorCode;
+        while ((errorCode = glGetError()) != GL_NO_ERROR)
+        {
+            std::string error;
+            switch (errorCode)
+            {
+                case GL_INVALID_ENUM:                  error = "INVALID_ENUM"; break;
+                case GL_INVALID_VALUE:                 error = "INVALID_VALUE"; break;
+                case GL_INVALID_OPERATION:             error = "INVALID_OPERATION"; break;
+                case GL_STACK_OVERFLOW:                error = "STACK_OVERFLOW"; break;
+                case GL_STACK_UNDERFLOW:               error = "STACK_UNDERFLOW"; break;
+                case GL_OUT_OF_MEMORY:                 error = "OUT_OF_MEMORY"; break;
+                case GL_INVALID_FRAMEBUFFER_OPERATION: error = "INVALID_FRAMEBUFFER_OPERATION"; break;
+            }
+            std::cout << error << " | " << file << " (" << line << ")" << std::endl;
+        }
+        return errorCode;
+    }
+
+    #define checkGLError() checkGLError(__FILE__, __LINE__)
+}
\ No newline at end of file
diff --git a/engine-ocean/Graphics/font.cpp b/engine-ocean/Graphics/font.cpp
new file mode 100644
index 0000000..b5bc7a1
--- /dev/null
+++ b/engine-ocean/Graphics/font.cpp
@@ -0,0 +1,74 @@
+#include "font.h"
+#include <iostream>
+
+Font::Font(const std::string filepath){
+    FT_Library ft;
+    if (FT_Init_FreeType(&ft))
+    {
+        std::cout << "ERROR::FREETYPE: Could not init FreeType Library" << std::endl;
+    }
+
+    FT_Face face;
+    if (FT_New_Face(ft, filepath.data(), 0, &face))
+    {
+        std::cout << "ERROR::FREETYPE: Failed to load font" << std::endl;  
+    }
+
+    FT_Set_Pixel_Sizes(face, 0, 48);
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // disable byte-alignment restriction
+  
+    for (unsigned char c = 0; c < 128; c++)
+    {
+        createGlyphTexture(c, face);
+    }
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // Back to default value
+    FT_Done_Face(face);
+    FT_Done_FreeType(ft);
+}
+
+Font::~Font(){
+
+}
+
+void Font::createGlyphTexture(unsigned char c, FT_Face &face){
+    if (FT_Load_Char(face, c, FT_LOAD_RENDER))
+    {
+        std::cout << "ERROR::FREETYTPE: Failed to load Glyph" << std::endl;
+        return;
+    }
+    // generate texture
+    unsigned int texture;
+    glGenTextures(1, &texture);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    glTexImage2D(
+        GL_TEXTURE_2D,
+        0,
+        GL_RED,
+        face->glyph->bitmap.width,
+        face->glyph->bitmap.rows,
+        0,
+        GL_RED,
+        GL_UNSIGNED_BYTE,
+        face->glyph->bitmap.buffer
+    );
+    // set texture options
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    // now store character for later use
+    unsigned int advance = static_cast<unsigned int>(face->glyph->advance.x);
+    Character character = {
+        texture, 
+        glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
+        glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
+        advance
+    };
+    m_characters.insert(std::pair<char, Character>(c, character));
+}
+
+Character& Font::getCharacter(char c){
+    return m_characters[c];
+}
diff --git a/engine-ocean/Graphics/font.h b/engine-ocean/Graphics/font.h
new file mode 100644
index 0000000..ea42a29
--- /dev/null
+++ b/engine-ocean/Graphics/font.h
@@ -0,0 +1,29 @@
+#pragma once
+
+// Credit to https://learnopengl.com/In-Practice/Text-Rendering
+
+#include "ft2build.h"
+#include "freetype/freetype.h"
+#include <GL/glew.h>
+#include "glm/glm.hpp"
+#include <map>
+#include <string>
+
+struct Character {
+    GLuint textureID;
+    glm::ivec2   size;
+    glm::ivec2   bearing;
+    unsigned int advance;
+};
+
+class Font {
+public:
+    Font(const std::string filepath);
+    ~Font();
+
+    Character& getCharacter(char c);
+
+private:
+    void createGlyphTexture(unsigned char c, FT_Face &face);
+    std::map<char, Character> m_characters;
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/global.h b/engine-ocean/Graphics/global.h
new file mode 100644
index 0000000..eb3e503
--- /dev/null
+++ b/engine-ocean/Graphics/global.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include "graphics.h"
+
+namespace Global{
+    inline Graphics graphics;
+}
\ No newline at end of file
diff --git a/engine-ocean/Graphics/graphics.cpp b/engine-ocean/Graphics/graphics.cpp
new file mode 100644
index 0000000..2b283a2
--- /dev/null
+++ b/engine-ocean/Graphics/graphics.cpp
@@ -0,0 +1,963 @@
+#include "graphics.h"
+#include "shapedata.h"
+#include <Eigen/Dense>
+
+
+#define TINYOBJLOADER_IMPLEMENTATION
+#include "tiny_obj_loader.h"
+
+
+#include "stb_image.h"
+
+Graphics::Graphics():
+    m_textRenderer(std::make_shared<TextRenderer>())
+{
+
+
+}
+
+Graphics::~Graphics(){
+    deleteFBOS();
+
+}
+
+void Graphics::initializeGLEW(){
+    glewExperimental = GL_TRUE;
+    std::cout<<"GLEWInit status: "<<glewInit()<<std::endl;
+}
+
+void Graphics::initialize(){
+    glEnable(GL_DEPTH_TEST);
+    //glDisable(GL_CULL_FACE);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    std::cout<<"initialize text renderer"<<std::endl;
+    m_textRenderer->initialize();
+
+    std::cout<<"add shapes"<<std::endl;
+    addShape("quad", quadVertexBufferData, VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV);
+    addShape("cube", cubeVertexBufferData, VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV);
+    addShape("sphere", sphereVertexBufferData, VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV);
+    addShape("cylinder", cylinderVertexBufferData, VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV);
+    addShape("cone", coneVertexBufferData, VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV);
+
+    addShader("phong", {GL_VERTEX_SHADER, GL_FRAGMENT_SHADER}, {"Resources/Shaders/phong.vert", "Resources/Shaders/phong.frag"});
+    addShader("text", {GL_VERTEX_SHADER, GL_FRAGMENT_SHADER}, {"Resources/Shaders/text.vert", "Resources/Shaders/text.frag"});
+    addShader("grass", {GL_VERTEX_SHADER, GL_GEOMETRY_SHADER, GL_FRAGMENT_SHADER}, {"Resources/Shaders/grass.vert", "Resources/Shaders/grassgeom.geom", "Resources/Shaders/grass.frag"});
+    addShader("skybox", {GL_VERTEX_SHADER, GL_FRAGMENT_SHADER}, {"Resources/Shaders/skybox.vert", "Resources/Shaders/skybox.frag"});
+    addShader("ui", {GL_VERTEX_SHADER, GL_FRAGMENT_SHADER}, {"Resources/Shaders/UIShader.vert", "Resources/Shaders/UIShader.frag"});
+    addShader("inventory", {GL_VERTEX_SHADER, GL_FRAGMENT_SHADER}, {"Resources/Shaders/UIShader.vert", "Resources/Shaders/InventoryShader.frag"});
+    addShader("water", {GL_VERTEX_SHADER, GL_FRAGMENT_SHADER}, {"Resources/Shaders/water.vert", "Resources/Shaders/water.frag"});
+
+
+
+
+
+    bindShader("phong");
+
+    addMaterial("default", glm::vec3(1));
+
+    std::cout<<"add font"<<std::endl;
+    addFont("opensans", "Resources/Fonts/OpenSans.ttf");
+    getFont("opensans");
+
+    // specify texture for grass shader
+    bindShader("grass");
+    glUniform1i(glGetUniformLocation(getShaderID("grass"), "grass_texture"),0);
+    glUniform1i(glGetUniformLocation(getShaderID("grass"), "wind_texture"),1);
+    glUniform1i(glGetUniformLocation(getShaderID("grass"), "meadow_texture"),7);
+
+    //glUniform1f(glGetUniformLocation(getShaderID("grass"), "numRows"), 2);
+
+
+    // specify texture for skybox
+    bindShader("skybox");
+    glUniform1i(glGetUniformLocation(getShaderID("skybox"), "cubeMap"), 3);
+
+    bindShader("ui");
+    glUniform1i(glGetUniformLocation(getShaderID("ui"), "guiTexture0"), 5);
+
+
+    bindShader("inventory");
+    glUniform1i(glGetUniformLocation(getShaderID("inventory"), "inventoryTexture0"), 6);
+
+    initializeReflectionFBO();
+    initializeRefractionFBO();
+
+    bindShader("water");
+    glUniform1i(glGetUniformLocation(getShaderID("water"), "reflect_texture"), 8);
+    glUniform1i(glGetUniformLocation(getShaderID("water"), "refract_texture"), 9);
+    glUniform1i(glGetUniformLocation(getShaderID("water"), "du_dv_map"), 10);
+
+
+    glm::vec3 sc = glm::vec3(.77f, .85f, .99f);
+    bindShader("skybox");
+    glUniform3f(glGetUniformLocation(getShaderID("skybox"), "skyColor"), sc.x, sc.y, sc.z);
+    bindShader("water");
+    glUniform3f(glGetUniformLocation(getShaderID("water"), "skyColor"), sc.x, sc.y, sc.z);
+    bindShader("grass");
+    glUniform3f(glGetUniformLocation(getShaderID("grass"), "skyColor"), sc.x, sc.y, sc.z);
+    bindShader("phong");
+    glUniform3f(glGetUniformLocation(getShaderID("phong"), "skyColor"), sc.x, sc.y, sc.z);
+
+
+
+
+
+}
+
+void Graphics::setClipPlane(glm::vec4 plane){
+    bindShader("phong");
+    glUniform4f(glGetUniformLocation(getShaderID("phong"), "plane"), plane.x, plane.y, plane.z, plane.w);
+    bindShader("grass");
+    glUniform4f(glGetUniformLocation(getShaderID("grass"), "plane"), plane.x, plane.y, plane.z, plane.w);
+    bindShader("water");
+    glUniform4f(glGetUniformLocation(getShaderID("water"), "plane"), plane.x, plane.y, plane.z, plane.w);
+}
+
+float Graphics::generateRandomNumbers(float lb, float ub){
+    float random = lb + static_cast <float>(rand()) / (static_cast <float>(RAND_MAX/(ub-lb)));
+
+    return random;
+}
+
+
+GLuint Graphics::loadCubeMap(std::vector<const char*> textureFiles){
+    // create empty texture
+    GLuint textureID;
+    glGenTextures(1, &textureID);
+
+    //glActiveTexture(GL_TEXTURE3);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
+
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+
+    GLuint target = GL_TEXTURE_CUBE_MAP_POSITIVE_X;
+    for (int i=0; i<6; i++){
+        std::string filename = std::string(textureFiles[i]);//directory + '/' + filename;
+        int width, height, nrChannels;
+        unsigned char* data = stbi_load(filename.c_str(), &width, &height, &nrChannels, 0);
+
+        if (data){
+            stbi_set_flip_vertically_on_load(false);
+            glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+            stbi_image_free(data);
+
+        }    else {
+            std::cout << "Texture failed to load at path: " << textureFiles[i] << std::endl;
+            stbi_image_free(data);
+        }
+    }
+
+    return textureID;
+}
+
+
+TextureData Graphics::loadTextureFromFile(const char *path)
+{
+    std::string filename = std::string(path);
+
+    GLuint textureID;
+    glGenTextures(1, &textureID);
+
+    int width, height, nrComponents;
+    stbi_set_flip_vertically_on_load(true);
+    unsigned char *data = stbi_load(filename.c_str(), &width, &height, &nrComponents, 0);
+    stbi_set_flip_vertically_on_load(false);
+    if (data)
+    {
+        GLenum format;
+        if (nrComponents == 1)
+            format = GL_RED;
+        else if (nrComponents == 3)
+            format = GL_RGB;
+        else if (nrComponents == 4)
+            format = GL_RGBA;
+
+        glBindTexture(GL_TEXTURE_2D, textureID);
+        glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
+        glGenerateMipmap(GL_TEXTURE_2D);
+
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        stbi_image_free(data);
+    }
+    else
+    {
+        std::cout << "Texture failed to load at path: " << path << std::endl;
+        stbi_image_free(data);
+    }
+
+    TextureData newtex;
+    newtex.textureID = textureID;
+    newtex.height = height;
+    newtex.width = width;
+    return newtex;
+}
+
+TextureData Graphics::loadTextureFromFile_Repeat(const char *path)
+{
+    std::string filename = std::string(path);
+
+    GLuint textureID;
+    glGenTextures(1, &textureID);
+
+    int width, height, nrComponents;
+    stbi_set_flip_vertically_on_load(true);
+    unsigned char *data = stbi_load(filename.c_str(), &width, &height, &nrComponents, 0);
+    stbi_set_flip_vertically_on_load(false);
+    if (data)
+    {
+        GLenum format;
+        if (nrComponents == 1)
+            format = GL_RED;
+        else if (nrComponents == 3)
+            format = GL_RGB;
+        else if (nrComponents == 4)
+            format = GL_RGBA;
+
+        glBindTexture(GL_TEXTURE_2D, textureID);
+        glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
+        glGenerateMipmap(GL_TEXTURE_2D);
+
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        stbi_image_free(data);
+    }
+    else
+    {
+        std::cout << "Texture failed to load at path: " << path << std::endl;
+        stbi_image_free(data);
+    }
+
+    TextureData newtex;
+    newtex.textureID = textureID;
+    newtex.height = height;
+    newtex.width = width;
+    return newtex;
+}
+
+
+
+GLuint Graphics::makeVAO(std::vector<float> positions){
+    int numVertices = positions.size()/2;
+    GLuint vao, vbo;
+
+    glGenVertexArrays(1, &vao);
+    glGenBuffers(1, &vbo);
+    glBindVertexArray(vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, vbo);
+    glBufferData(GL_ARRAY_BUFFER, positions.size()*sizeof(float), positions.data(), GL_STATIC_DRAW);
+
+    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2*sizeof(float), (void*)0);
+
+    // unbind
+    glEnableVertexAttribArray(0);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    return vao;
+}
+
+void Graphics::clearScreen(GLbitfield mask){
+    glClear(mask);
+}
+
+void Graphics::setClearColor(glm::vec3 clearColor){
+    glClearColor(clearColor.r, clearColor.g, clearColor.b, 1);
+}
+
+void Graphics::setCameraData(std::shared_ptr<Camera> camera){
+    m_active_shader->setCamera(camera);
+}
+
+void Graphics::addShader(std::string shaderName, std::vector<GLenum> shaderTypes, std::vector<const char*> filepaths){
+    m_shaders.insert({shaderName, std::make_shared<Shader>(shaderTypes, filepaths)});
+}
+
+void Graphics::removeShader(std::string shaderName){
+    if(shaderName != "phong" && shaderName != "text"){
+        m_shaders.erase(shaderName);
+    }
+}
+
+void Graphics::bindShader(std::string shaderName){
+    m_shaders.at(shaderName)->bind();
+    m_active_shader = m_shaders.at(shaderName);
+}
+
+GLuint Graphics::getShaderID(std::string shaderName){
+    return m_shaders.at(shaderName)->getHandle();
+
+}
+
+std::shared_ptr<Shape> Graphics::addShape(std::string shapeName, std::vector<float> data, VAOAttrib attribs){
+    m_shapes.insert({shapeName, std::make_shared<Shape>(std::make_shared<VAO>(std::make_shared<VBO>(data), attribs))});
+    return m_shapes.at(shapeName);
+}
+std::vector<glm::vec3> Graphics::addShape(std::string shapeName, std::string filepath, bool hasUV){
+    tinyobj::attrib_t attrib;
+    std::vector<tinyobj::shape_t> shapes;
+    std::vector<tinyobj::material_t> materials;
+    std::string warn, err;
+
+    if (!tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, filepath.c_str())) {
+        throw std::runtime_error(warn + err);
+    }
+
+    int numTriangles = 0;
+    for(size_t s = 0; s < shapes.size(); s++){
+        numTriangles += shapes[s].mesh.num_face_vertices.size();
+    }
+
+    std::vector<float> drawData;
+    drawData.resize(numTriangles * 3 * 8);
+    std::vector<glm::vec3> collisionData;
+    collisionData.resize(numTriangles * 3);
+
+    int i = 0;
+    int j = 0;
+    for(size_t s = 0; s < shapes.size(); s++) {
+        size_t index_offset = 0;
+        for(size_t f = 0; f < shapes[s].mesh.num_face_vertices.size(); f++) {
+            unsigned int fv = shapes[s].mesh.num_face_vertices[f];
+
+            for(size_t v = 0; v < fv; v++) {
+                tinyobj::index_t idx = shapes[s].mesh.indices[index_offset + v];
+
+                // Add position
+                drawData[i] = attrib.vertices[3*idx.vertex_index];
+                drawData[i + 1] = attrib.vertices[3*idx.vertex_index + 1];
+                drawData[i + 2] = attrib.vertices[3*idx.vertex_index + 2];
+                // Add normal
+                drawData[i + 3] = attrib.normals[3*idx.normal_index];
+                drawData[i + 4] = attrib.normals[3*idx.normal_index + 1];
+                drawData[i + 5] = attrib.normals[3*idx.normal_index + 2];
+                // Add uv
+                drawData[i + 6] = 0;
+                drawData[i + 7] = 0;
+                if(hasUV){
+                    drawData[i + 6] = attrib.texcoords[2*idx.texcoord_index];
+                    drawData[i + 7] = attrib.texcoords[2*idx.texcoord_index + 1];
+                }
+
+                // Add collision position data
+                collisionData[j] = glm::vec3(attrib.vertices[3*idx.vertex_index], attrib.vertices[3*idx.vertex_index + 1], attrib.vertices[3*idx.vertex_index + 2]);
+                i += 8;
+                j += 1;
+            }
+
+            index_offset += fv;
+        }
+    }
+
+    m_shapes.insert({shapeName, std::make_shared<Shape>(std::make_shared<VAO>(std::make_shared<VBO>(drawData), VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV))});
+
+    std::cout << "coliision data size normal: " << collisionData.size() << std::endl;
+    return collisionData;
+}
+
+std::vector<glm::vec3> Graphics::addShape_manual(std::string shapeName, 
+                                                 const std::vector<Eigen::Vector3f> &verts, 
+                                                 const std::vector<Eigen::Vector3i> &faces,
+                                                 bool hasUV){
+
+    std::pair<std::vector<glm::vec3>, std::shared_ptr<VAO>> info = makeVAOFromData(verts, faces, hasUV);
+
+    m_shapes.insert({shapeName, std::make_shared<Shape>(info.second)});
+
+    std::cout << "ADD SHAPE MANUAL" << std::endl;
+
+    return info.first;
+}
+
+std::pair<std::vector<glm::vec3>, std::shared_ptr<VAO>> Graphics::makeVAOFromData(const std::vector<Eigen::Vector3f> &verts,
+                                               const std::vector<Eigen::Vector3i> &faces,
+                                               bool hasUV, bool needsCollisionData){
+
+
+
+  std::vector<float> drawData;
+  drawData.resize(faces.size() * 3 * 8);
+  std::vector<glm::vec3> collisionData;
+  collisionData.resize(faces.size() * 3);
+
+  int i = 0;
+  int j = 0;
+
+  float uv = 0;
+
+  size_t index_offset = 0;
+  for(size_t f = 0; f < faces.size(); f++) {
+      Eigen::Vector3i face = faces[f];
+      Eigen::Vector3f faceNormal = getFaceNormal(verts, face);
+
+
+      for(int v = 0; v < 3; v++) {
+          int idx = face[v];
+          Eigen::Vector3f vertexPos = verts[idx];
+
+          // Add position
+          drawData[i] = vertexPos[0];
+          drawData[i + 1] = vertexPos[1];
+          drawData[i + 2] = vertexPos[2];
+          // Add normal
+          drawData[i + 3] = 0.f;
+          drawData[i + 4] = 1.f;
+          drawData[i + 5] = 0.f;
+          // Add uv
+          drawData[i + 6] = 0;
+          drawData[i + 7] = 0;
+
+          if(hasUV){
+              drawData[i + 6] = uv;
+              drawData[i + 7] = uv;
+
+              uv += .01;
+          }
+
+          if (needsCollisionData){
+              // Add collision position data
+              collisionData[j] = glm::vec3(vertexPos[0], vertexPos[1], vertexPos[2]);
+          }
+          i += 8;
+          j += 1;
+      }
+  }
+
+
+  std::shared_ptr<VAO> vao = std::make_shared<VAO>(std::make_shared<VBO>(drawData), VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV);
+  return std::make_pair(collisionData, vao);
+
+
+}
+
+Eigen::Vector3f Graphics::getFaceNormal(const std::vector<Eigen::Vector3f> &verts, const Eigen::Vector3i& face)
+{
+    Eigen::Vector3f v1 = verts[face[0]];
+    Eigen::Vector3f v2 = verts[face[1]];
+    Eigen::Vector3f v3 = verts[face[2]];
+    Eigen::Vector3f e1 = v2 - v1;
+    Eigen::Vector3f e2 = v3 - v1;
+    Eigen::Vector3f n = e1.cross(e2);
+    return n.normalized();
+}
+
+
+
+// MATERIALSS
+std::vector<glm::vec3> Graphics::addShape_withMaterial(std::string shapeName, std::string filepath, std::string mtl_file, bool hasUV){
+    tinyobj::attrib_t attrib;
+    std::vector<tinyobj::shape_t> shapes;
+    std::vector<tinyobj::material_t> materials;
+    std::string warn, err;
+
+    if (!tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, filepath.c_str(), mtl_file.c_str())) {
+        throw std::runtime_error(warn + err);
+    }
+
+    int numTriangles = 0;
+    for(size_t s = 0; s < shapes.size(); s++){
+        numTriangles += shapes[s].mesh.num_face_vertices.size();
+    }
+
+    std::cout << "materials size: " << materials.size() << std::endl;
+    for (auto m : materials){
+        std::cout << "material: " << m.name << std::endl;
+    }
+
+
+    std::vector<std::string> shape_names;
+    std::vector<glm::vec3> collisionData;
+    std::cout << "---- NUM Triangles: " << numTriangles * 3 << std::endl;
+    collisionData.resize(numTriangles * 3);
+
+
+
+    int j = 0;
+    for(size_t s = 0; s < shapes.size(); s++) {
+        int i = 0;
+        bool hasMaterial = true;
+        std::shared_ptr<Material> shape_material;
+        std::vector<float> drawData;
+        drawData.resize(shapes[s].mesh.num_face_vertices.size() * 3 * 8);
+
+        size_t index_offset = 0;
+
+        int shape_material_id = shapes[s].mesh.material_ids[0];
+
+        if (shape_material_id < 0) hasMaterial = false;
+        if (hasMaterial){
+            std::string shape_material_name = materials[shape_material_id].name;
+            //std::cout << "load: " << shape_material_name << std::endl;
+            std::string shape_material_path = "/Users/jesswan/Desktop/cs1950u/cs1950u-jjesswan/Resources/Images/" + shape_material_name + ".png";
+            shape_material = addMaterial(shape_material_name, shape_material_path, 1.f);
+        }
+
+//        std::cout << "shape name:" << shapes[s].name << std::endl;
+//        std::cout << "mesh material id sample:" << shapes[s].mesh.material_ids[0] << std::endl;
+//        std::cout << "mesh material id sample2:" << shapes[s].mesh.material_ids[5] << std::endl;
+
+//        std::cout << "mesh material id size:" << shapes[s].mesh.material_ids.size() << std::endl;
+//        std::cout << "num faces:" << shapes[s].mesh.num_face_vertices.size() << std::endl;
+
+        for(size_t f = 0; f < shapes[s].mesh.num_face_vertices.size(); f++) {
+            unsigned int fv = shapes[s].mesh.num_face_vertices[f];
+
+            for(size_t v = 0; v < fv; v++) {
+                tinyobj::index_t idx = shapes[s].mesh.indices[index_offset + v];
+
+                // Add position
+                drawData[i] = attrib.vertices[3*idx.vertex_index];
+                drawData[i + 1] = attrib.vertices[3*idx.vertex_index + 1];
+                drawData[i + 2] = attrib.vertices[3*idx.vertex_index + 2];
+                // Add normal
+                drawData[i + 3] = attrib.normals[3*idx.normal_index];
+                drawData[i + 4] = attrib.normals[3*idx.normal_index + 1];
+                drawData[i + 5] = attrib.normals[3*idx.normal_index + 2];
+                // Add uv
+                drawData[i + 6] = 0;
+                drawData[i + 7] = 0;
+                if(hasUV){
+                    drawData[i + 6] = attrib.texcoords[2*idx.texcoord_index];
+                    drawData[i + 7] = attrib.texcoords[2*idx.texcoord_index + 1];
+                }
+
+                // Add collision position data
+                collisionData[j] = glm::vec3(attrib.vertices[3*idx.vertex_index], attrib.vertices[3*idx.vertex_index + 1], attrib.vertices[3*idx.vertex_index + 2]);
+                i += 8;
+                j += 1;
+            }
+
+            index_offset += fv;
+        }
+
+        if (hasMaterial){
+            m_shapes.insert({shapeName + std::to_string(s), std::make_shared<Shape>(std::make_shared<VAO>(std::make_shared<VBO>(drawData), VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV), shape_material)});
+        } else {
+            m_shapes.insert({shapeName + std::to_string(s), std::make_shared<Shape>(std::make_shared<VAO>(std::make_shared<VBO>(drawData), VAOAttrib::POS | VAOAttrib::NORM | VAOAttrib::UV))});
+        }
+
+        shape_names.push_back(shapeName + std::to_string(s));
+    }
+
+    std::cout << "DONE LOADING MTL" << std::endl;
+    m_shape_groups.insert({shapeName, shape_names});
+    std::cout << "collision data size: " << collisionData.size() << std::endl;
+    return collisionData;
+}
+
+std::pair<std::vector<glm::vec3>, std::vector<glm::ivec3>> Graphics::getNavmeshData(std::string filepath){
+    tinyobj::attrib_t attrib;
+    std::vector<tinyobj::shape_t> shapes;
+    std::vector<tinyobj::material_t> materials;
+    std::string warn, err;
+
+    if (!tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, filepath.c_str())) {
+        throw std::runtime_error(warn + err);
+    }
+
+    int numTriangles = 0;
+    for(size_t s = 0; s < shapes.size(); s++){
+        numTriangles += shapes[s].mesh.num_face_vertices.size();
+    }
+
+    std::vector<glm::vec3> positions;
+    std::vector<glm::ivec3> faces;
+
+    for(int i = 0; i<attrib.vertices.size(); i+=3){
+        positions.push_back(glm::vec3(attrib.vertices[i], attrib.vertices[i+1], attrib.vertices[i+2]));
+    }
+
+
+    int i = 0;
+    int j = 0;
+    for(size_t s = 0; s < shapes.size(); s++) {
+        for(size_t f = 0; f < shapes[s].mesh.num_face_vertices.size(); f++) {
+            tinyobj::index_t idx1 = shapes[s].mesh.indices[3* f];
+            tinyobj::index_t idx2 = shapes[s].mesh.indices[3* f + 1];
+            tinyobj::index_t idx3 = shapes[s].mesh.indices[3* f + 2];
+            faces.push_back(glm::ivec3(idx1.vertex_index, idx2.vertex_index, idx3.vertex_index));
+        }
+    }
+
+    return std::make_pair(positions, faces);
+}
+
+void Graphics::removeShape(std::string shapeName){
+    m_shapes.erase(shapeName);
+}
+
+std::shared_ptr<Shape> Graphics::getShape(std::string shapeName){
+    return m_shapes.at(shapeName);
+}
+
+std::vector<std::shared_ptr<Shape>> Graphics::getShapeGroup(std::string shapeName){
+    std::vector<std::string> shape_ids = m_shape_groups.at(shapeName);
+    std::vector<std::shared_ptr<Shape>> all_shapes;
+
+    for (std::string id : shape_ids){
+        all_shapes.push_back(m_shapes.at(id));
+    }
+
+    return all_shapes;
+}
+
+void Graphics::drawShape(std::shared_ptr<Shape> myShape, std::shared_ptr<ModelTransform> modelTransform, std::shared_ptr<Material> material){
+    if(material == nullptr){
+        m_active_shader->setMaterial(getMaterial("default"));
+    }
+    else{
+        m_active_shader->setMaterial(material);
+    }
+    m_active_shader->setModelTransform(modelTransform);
+    myShape->draw();
+}
+
+void Graphics::drawShape(std::shared_ptr<Shape> myShape, glm::mat4 modelMatrix, std::shared_ptr<Material> material){
+    if(material == nullptr){
+        m_active_shader->setMaterial(getMaterial("default"));
+    }
+    else{
+        m_active_shader->setMaterial(material);
+    }
+    m_active_shader->setModelTransform(modelMatrix);
+    myShape->draw();
+}
+
+std::vector<float> Graphics::getObjData(std::string filepath){
+    tinyobj::attrib_t attrib;
+    std::vector<tinyobj::shape_t> shapes;
+    std::vector<tinyobj::material_t> materials;
+    std::string warn, err;
+
+    if (!tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, filepath.c_str())) {
+        throw std::runtime_error(warn + err);
+    }
+
+    std::vector<glm::vec3> faces;
+    std::vector<glm::vec3> vertices;
+
+    for(size_t s = 0; s < shapes.size(); s++) {
+        size_t index_offset = 0;
+        for(size_t f = 0; f < shapes[s].mesh.num_face_vertices.size(); f++) {
+            unsigned int fv = shapes[s].mesh.num_face_vertices[f];
+
+            glm::vec3 face;
+            for(size_t v = 0; v < fv; v++) {
+                tinyobj::index_t idx = shapes[s].mesh.indices[index_offset + v];
+
+                face[v] = idx.vertex_index;
+
+            }
+            faces.push_back(face);
+
+            index_offset += fv;
+        }
+    }
+    for (size_t i = 0; i < attrib.vertices.size(); i += 3) {
+        vertices.emplace_back(attrib.vertices[i], attrib.vertices[i + 1], attrib.vertices[i + 2]);
+    }
+
+    std::vector<float> data;
+    data.resize(18 * faces.size());
+    for(int i = 0; i<faces.size(); i++){
+        glm::vec3 v0 = vertices[static_cast<int>(faces[i].x)];
+        glm::vec3 v1 = vertices[static_cast<int>(faces[i].y)];
+        glm::vec3 v2 = vertices[static_cast<int>(faces[i].z)];
+        glm::vec3 normal = glm::normalize(glm::cross(v1 - v0, v2 - v0));
+
+        data[18*i] = v0.x;
+        data[18*i+1] = v0.y;
+        data[18*i+2] = v0.z;
+        data[18*i+3] = normal.x;
+        data[18*i+4] = normal.y;
+        data[18*i+5] = normal.z;
+        data[18*i+6] = v1.x;
+        data[18*i+7] = v1.y;
+        data[18*i+8] = v1.z;
+        data[18*i+9] = normal.x;
+        data[18*i+10] = normal.y;
+        data[18*i+11] = normal.z;
+        data[18*i+12] = v2.x;
+        data[18*i+13] = v2.y;
+        data[18*i+14] = v2.z;
+        data[18*i+15] = normal.x;
+        data[18*i+16] = normal.y;
+        data[18*i+17] = normal.z;
+    }
+
+    return data;
+}
+
+std::shared_ptr<Material> Graphics::addMaterial(std::string materialName, glm::vec3 color, float shininess){
+    std::shared_ptr<Material> newMaterial = std::make_shared<Material>(color, shininess);
+    m_materials.insert({materialName, newMaterial});
+    return m_materials.at(materialName);
+}
+
+std::shared_ptr<Material> Graphics::addMaterial(std::string materialName, float shininess){
+    std::shared_ptr<Material> newMaterial = std::make_shared<Material>(shininess);
+    m_materials.insert({materialName, newMaterial});
+    return m_materials.at(materialName);
+}
+
+std::shared_ptr<Material> Graphics::addMaterial(std::string materialName, std::string filePath, float shininess){
+    std::shared_ptr<Texture> newTexture = std::make_shared<Texture>(filePath);
+    std::shared_ptr<Material> newMaterial = std::make_shared<Material>(newTexture, shininess);
+    m_materials.insert({materialName, newMaterial});
+    return m_materials.at(materialName);
+}
+
+void Graphics::removeMaterial(std::string materialName){
+    if(materialName != "default"){
+        m_materials.erase(materialName);
+    }
+}
+
+std::shared_ptr<Material> Graphics::getMaterial(std::string materialName){
+    return m_materials.at(materialName);
+}
+
+std::shared_ptr<Font> Graphics::addFont(std::string fontName, std::string filepath){
+    std::shared_ptr<Font> newFont = std::make_shared<Font>(filepath);
+    m_fonts.insert({fontName, newFont});
+    return m_fonts.at(fontName);
+}
+
+void Graphics::removeFont(std::string fontName){
+    m_fonts.erase(fontName);
+}
+
+std::shared_ptr<Font> Graphics::getFont(std::string fontName){
+    return m_fonts.at(fontName);
+}
+
+void Graphics::drawUIText(std::shared_ptr<Font> font, std::string text, glm::vec2 anchorPosition, AnchorPoint anchorPoint, float textBoxWidth, float fontSize, float lineSpacing, glm::vec3 textColor){
+    m_active_shader->setTextUniforms(m_windowSize.x, m_windowSize.y, textColor);
+    m_textRenderer->renderUIText(font, text, anchorPosition, anchorPoint, textBoxWidth, fontSize, lineSpacing, textColor);
+}
+
+void Graphics::setGlobalData(glm::vec3 globalCoeffs){
+    m_active_shader->setGlobalCoeffs(globalCoeffs);
+}
+
+void Graphics::setLights(std::vector<std::shared_ptr<Light>> lights){
+    m_active_shader->setLights(lights);
+}
+
+void Graphics::clearLights(){
+    m_active_shader->clearLights();
+}
+
+void Graphics::setWindowSize(glm::ivec2 windowSize){
+    m_windowSize = windowSize;
+}
+
+glm::ivec2 Graphics::getWindowSize(){
+    return m_windowSize;
+}
+
+void Graphics::setFramebufferSize(glm::ivec2 framebufferSize){
+    m_framebufferSize = framebufferSize;
+    glViewport(0, 0, m_framebufferSize.x, m_framebufferSize.y);
+}
+
+glm::ivec2 Graphics::getFramebufferSize(){
+    return m_framebufferSize;
+}
+
+
+// WATERRRR //////
+
+void Graphics::setWaterHeight(float height){
+    m_water_height = height;
+
+}
+
+float Graphics::getWaterHeight(){
+    return m_water_height;
+}
+
+
+void Graphics::bindReflection(){
+    Debug::checkGLError();
+    bindFBO(reflectionFBO, REFLECTION_W, REFLECTION_H);
+    Debug::checkGLError();
+
+}
+
+void Graphics::bindRefraction(){
+    Debug::checkGLError();
+
+    bindFBO(refractionFBO, REFRACTION_W, REFRACTION_H);
+    Debug::checkGLError();
+
+}
+
+GLuint Graphics::getReflectionTexture(){
+    return reflectionTexture;
+}
+
+GLuint Graphics::getRefractionTexture(){
+    return refractionTexture;
+}
+
+GLuint Graphics::getReflectionRBO(){
+    return reflectionDepthBuffer;
+}
+
+GLuint Graphics::getRefractionDepth(){
+    return refractionDepthTexture;
+}
+
+
+void Graphics::initializeReflectionFBO(){
+    Debug::checkGLError();
+
+    reflectionFBO = createFBO();
+    Debug::checkGLError();
+
+    reflectionTexture = createTextureAttachment(REFLECTION_W, REFLECTION_H);
+    Debug::checkGLError();
+
+    reflectionDepthBuffer = createDepthBuffer(REFLECTION_W, REFLECTION_H);
+    Debug::checkGLError();
+
+    unbindFBO();
+    Debug::checkGLError();
+
+}
+
+void Graphics::initializeRefractionFBO(){
+    Debug::checkGLError();
+
+    refractionFBO = createFBO();
+    Debug::checkGLError();
+
+    refractionTexture = createTextureAttachment(REFRACTION_W, REFRACTION_H);
+    Debug::checkGLError();
+
+   // glDrawBuffer(GL_NONE);
+    refractionDepthTexture = createDepthTextureAttachment(REFRACTION_W, REFRACTION_H);
+    Debug::checkGLError();
+    unbindFBO();
+    Debug::checkGLError();
+
+
+}
+void Graphics::bindFBO(GLuint fbo, int width, int height){
+    // make sure texture isnt already bound
+    Debug::checkGLError();
+    glBindTexture(GL_TEXTURE_2D, 0);
+    Debug::checkGLError();
+
+    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    Debug::checkGLError();
+
+    glViewport(0, 0, width, height);
+    Debug::checkGLError();
+
+    auto fboStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+    if (fboStatus != GL_FRAMEBUFFER_COMPLETE){
+        std::cout << "Framebuffer not complete: " << fboStatus << std::endl;
+    }
+    Debug::checkGLError();
+
+
+}
+
+void Graphics::unbindFBO(){
+    Debug::checkGLError();
+
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    glViewport(0, 0, m_framebufferSize.x, m_framebufferSize.y);
+}
+
+GLuint Graphics::createFBO(){
+    GLuint fbo;
+    glGenFramebuffers(1, &fbo);
+    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    glDrawBuffer(GL_COLOR_ATTACHMENT0);
+    return fbo;
+}
+
+GLuint Graphics::createTextureAttachment(int width, int height){
+    GLuint texture;
+    glGenTextures(1, &texture);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    // adds texture attachement to currently bound fbo
+    std::cout << "Color buffer: " << texture << std::endl;
+
+    //glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture, 0);
+
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
+
+    return texture;
+}
+
+GLuint Graphics::createDepthTextureAttachment(int width, int height){
+    GLuint texture;
+    glBindTexture(GL_TEXTURE_2D, 0);
+    glGenTextures(1, &texture);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    Debug::checkGLError();
+
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, width, height, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL);
+    Debug::checkGLError();
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    std::cout << "Depth texture: " << texture << std::endl;
+
+    Debug::checkGLError();
+
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    Debug::checkGLError();
+
+    // adds texture attachement to currently bound fbo
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, texture, 0);
+    Debug::checkGLError();
+
+    return texture;
+}
+
+GLuint Graphics::createDepthBuffer(int width, int height){
+    GLuint depthBuffer;
+    glGenRenderbuffers(1, &depthBuffer);
+    glBindRenderbuffer(GL_RENDERBUFFER, depthBuffer);
+    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
+    glBindRenderbuffer(GL_RENDERBUFFER, 0);
+    std::cout << "Depth buffer: " << depthBuffer << std::endl;
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthBuffer);
+    return depthBuffer;
+}
+
+void Graphics::deleteFBOS(){
+    glDeleteFramebuffers(1, &reflectionFBO);
+    glDeleteFramebuffers(1, &refractionFBO);
+
+    glDeleteTextures(1, &reflectionTexture);
+    glDeleteTextures(1, &refractionTexture);
+    glDeleteTextures(1, &refractionDepthTexture);
+
+    glDeleteRenderbuffers(1, &reflectionDepthBuffer);
+}
diff --git a/engine-ocean/Graphics/graphics.h b/engine-ocean/Graphics/graphics.h
new file mode 100644
index 0000000..ce07727
--- /dev/null
+++ b/engine-ocean/Graphics/graphics.h
@@ -0,0 +1,166 @@
+#pragma once
+
+#include "GLWrappers/vao.h"
+#include "camera.h"
+#include "GLWrappers/shader.h"
+#include "material.h"
+#include <map>
+#include <GL/glew.h>
+#include <memory>
+#include <vector>
+#include "shape.h"
+#include "modeltransform.h"
+#include "light.h"
+#include "textrenderer.h"
+
+#include <Eigen/Dense>
+
+struct TextureData{
+    GLuint textureID;
+    int width;
+    int height;
+};
+
+class Graphics
+{
+public:
+    Graphics();
+    ~Graphics();
+
+    void initialize();
+    void clearScreen(GLbitfield mask);
+    void setClearColor(glm::vec3 clearColor);
+    TextureData loadTextureFromFile(const char *path);
+    TextureData loadTextureFromFile_Repeat(const char *path);
+
+    GLuint loadCubeMap(std::vector<const char*> textureFiles);
+
+    GLuint makeVAO(std::vector<float> positions);
+    std::pair<std::vector<glm::vec3>, std::shared_ptr<VAO>> makeVAOFromData(const std::vector<Eigen::Vector3f> &verts,
+                                                   const std::vector<Eigen::Vector3i> &faces,
+                                                   bool hasUV, bool needsCollisionData = true);
+    float generateRandomNumbers(float lb, float ub);
+
+    void setClipPlane(glm::vec4 plane);
+
+
+
+
+
+
+
+
+    void setCameraData(std::shared_ptr<Camera> camera);
+
+    void addShader(std::string shaderName, std::vector<GLenum> shaderTypes, std::vector<const char*> filepaths);
+    void removeShader(std::string shaderName);
+    void bindShader(std::string shaderName = "phong");
+    GLuint getShaderID(std::string shaderName);
+
+
+    // Shape-related methods
+    std::shared_ptr<Shape> addShape(std::string shapeName, std::vector<float> data, VAOAttrib attribs);
+    std::vector<glm::vec3> addShape(std::string shapeName, std::string filepath, bool hasUV = true);
+    std::vector<glm::vec3> addShape_manual(std::string shapeName,
+                                                     const std::vector<Eigen::Vector3f> &verts,
+                                                     const std::vector<Eigen::Vector3i> &faces,
+                                                     bool hasUV = true);
+
+    std::vector<glm::vec3> addShape_withMaterial(std::string shapeName, std::string filepath, std::string mtl_file, bool hasUV);
+
+    // Returns pair containing positions followed by triangles indexed into the positions vector
+    std::pair<std::vector<glm::vec3>, std::vector<glm::ivec3>> getNavmeshData(std::string filepath);
+    void removeShape(std::string shapeName);
+    std::shared_ptr<Shape> getShape(std::string shapeName);
+    std::vector<std::shared_ptr<Shape>> getShapeGroup(std::string shapeName);
+    void drawShape(std::shared_ptr<Shape> myShape, std::shared_ptr<ModelTransform> modelTransform, std::shared_ptr<Material> material = nullptr);
+    void drawShape(std::shared_ptr<Shape> myShape, glm::mat4 modelMatrix, std::shared_ptr<Material> material = nullptr);
+
+    // Obj-loading method
+    std::vector<float> getObjData(std::string filepath);
+
+    // Material-related methods
+    std::shared_ptr<Material> addMaterial(std::string materialName, glm::vec3 color, float shininess = 1.f);
+    std::shared_ptr<Material> addMaterial(std::string materialName, float shininess = 1.f);
+    std::shared_ptr<Material> addMaterial(std::string materialName, std::string filePath, float shininess = 1.f);
+    void removeMaterial(std::string materialName);
+    std::shared_ptr<Material> getMaterial(std::string materialName);
+
+    // Text and Font-related methods
+    std::shared_ptr<Font> addFont(std::string fontName, std::string filepath);
+    void removeFont(std::string fontName);
+    std::shared_ptr<Font> getFont(std::string fontName);
+    void drawUIText(std::shared_ptr<Font> font, std::string text, glm::vec2 anchorPosition, AnchorPoint anchorPoint, float textBoxWidth, float fontSize, float lineSpacing, glm::vec3 textColor);
+
+    void setGlobalData(glm::vec3 globalCoeffs);
+
+    void setLights(std::vector<std::shared_ptr<Light>> lights);
+    void clearLights();
+
+    void initializeGLEW();
+
+    void setWindowSize(glm::ivec2 windowSize);
+    glm::ivec2 getWindowSize();
+
+    void setFramebufferSize(glm::ivec2 framebufferSize);
+    glm::ivec2 getFramebufferSize();
+
+
+    // WATER STUFF
+    GLuint reflectionFBO, reflectionTexture, reflectionDepthBuffer;
+    GLuint refractionFBO, refractionTexture, refractionDepthTexture;
+
+    void bindRefraction();
+    void bindReflection();
+    GLuint getRefractionTexture();
+    GLuint getReflectionTexture();
+    void unbindFBO();
+    GLuint getReflectionRBO();
+    GLuint getRefractionDepth();
+
+
+
+
+    const int REFLECTION_W = 512;
+    const int REFLECTION_H = 256;
+    const int REFRACTION_W = 512;
+    const int REFRACTION_H = 256;
+
+    void setWaterHeight(float height);
+    float getWaterHeight();
+
+
+
+
+private:
+    void initializeReflectionFBO();
+    void initializeRefractionFBO();
+    void deleteFBOS();
+    void bindFBO(GLuint fbo, int width, int height);
+    GLuint createFBO();
+    GLuint createTextureAttachment(int width, int height);
+    GLuint createDepthTextureAttachment(int width, int height);
+    GLuint createDepthBuffer(int width, int height);
+
+
+
+
+    glm::ivec2 m_windowSize;
+    glm::ivec2 m_framebufferSize;
+
+    std::shared_ptr<TextRenderer> m_textRenderer;
+
+    std::map<std::string, std::shared_ptr<Shader>> m_shaders;
+    std::map<std::string, std::shared_ptr<Shape>> m_shapes;
+    std::map<std::string, std::vector<std::string>> m_shape_groups; // stores the shape names kept in m_shapes associated with object
+    std::map<std::string, std::shared_ptr<Material>> m_materials;
+    std::map<std::string, std::shared_ptr<Font>> m_fonts;
+
+    std::shared_ptr<Shader> m_active_shader;
+
+    float m_water_height = 0.f;
+
+
+    Eigen::Vector3f getFaceNormal(const std::vector<Eigen::Vector3f> &verts, const Eigen::Vector3i& face);
+
+};
diff --git a/engine-ocean/Graphics/light.cpp b/engine-ocean/Graphics/light.cpp
new file mode 100644
index 0000000..e2e5a38
--- /dev/null
+++ b/engine-ocean/Graphics/light.cpp
@@ -0,0 +1,69 @@
+#include "light.h"
+
+
+Light::Light(LightType type, glm::vec3 lightData, glm::vec3 lightColor):
+    m_lightType(type),
+    m_lightColor(lightColor),
+    m_lightFunction(glm::vec3(1))
+{
+    switch(type){
+        case LightType::POINT:
+            m_lightPos = lightData;
+            break;
+        case LightType::DIRECTIONAL:
+            m_lightDir = lightData;
+            break;
+    }
+}
+
+Light::~Light(){
+    
+}
+
+void Light::setPos(glm::vec3 newPos){
+    m_lightPos = newPos;
+}
+
+glm::vec3 Light::getPos(){
+    return m_lightPos;
+}
+
+void Light::translate(glm::vec3 delta){
+    m_lightPos += delta;
+}
+
+void Light::setAttenuation(glm::vec3 attenuation){
+    m_lightFunction = attenuation;
+}
+
+glm::vec3 Light::getAttenuation(){
+    return m_lightFunction;
+}
+
+void Light::setDir(glm::vec3 newDir){
+    m_lightDir = newDir;
+}
+
+glm::vec3 Light::getDir(){
+    return m_lightDir;
+}
+
+void Light::rotate(float angle, glm::vec3 axis){
+    m_lightDir = glm::vec3(glm::rotate(glm::mat4(1), angle, axis)*glm::vec4(m_lightDir, 0));
+}
+
+void Light::setColor(glm::vec3 newColor){
+    m_lightColor = newColor;
+}
+
+glm::vec3 Light::getColor(){
+    return m_lightColor;
+}
+
+void Light::setType(LightType newType){
+    m_lightType = newType;
+}
+
+LightType Light::getType(){
+    return m_lightType;
+}
diff --git a/engine-ocean/Graphics/light.h b/engine-ocean/Graphics/light.h
new file mode 100644
index 0000000..0c42b7f
--- /dev/null
+++ b/engine-ocean/Graphics/light.h
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "glm/glm.hpp"
+#include "glm/ext.hpp"
+
+enum LightType{
+    POINT,
+    DIRECTIONAL
+};
+
+class Light{
+public:
+    Light(LightType type, glm::vec3 lightData, glm::vec3 lightColor = glm::vec3(1));
+    ~Light();
+
+    // Functions for point lights
+    void setPos(glm::vec3 newPos);
+    glm::vec3 getPos();
+    void translate(glm::vec3 delta);
+    void setAttenuation(glm::vec3 attenuation);
+    glm::vec3 getAttenuation();
+
+    // Functions for directional lights
+    void setDir(glm::vec3 newDir);
+    glm::vec3 getDir();
+    void rotate(float angle, glm::vec3 axis);
+
+    // Utility functions for light color
+    void setColor(glm::vec3 newColor);
+    glm::vec3 getColor();
+
+    // Utility functions for the light type
+    void setType(LightType newType);
+    LightType getType();
+
+private:
+    LightType m_lightType;
+    glm::vec3 m_lightPos;
+    glm::vec3 m_lightDir;
+    glm::vec3 m_lightColor;
+    glm::vec3 m_lightFunction;
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/material.cpp b/engine-ocean/Graphics/material.cpp
new file mode 100644
index 0000000..8e0c561
--- /dev/null
+++ b/engine-ocean/Graphics/material.cpp
@@ -0,0 +1,62 @@
+#include "material.h"
+#include <Eigen/Dense>
+
+
+Material::Material(glm::vec3 color, float shininess):
+    m_colorSource(ColorSource::SOLID_COLOR),
+    m_color(color),
+    m_shininess(shininess)
+{
+
+}
+
+Material::Material(float shininess):
+    m_colorSource(ColorSource::PER_VERTEX_COLOR),
+    m_shininess(shininess)
+{
+
+}
+
+Material::Material(std::shared_ptr<Texture> texture, float shininess):
+    m_colorSource(ColorSource::TEXTURE_COLOR),
+    m_texture(texture),
+    m_shininess(shininess)
+{
+
+}
+
+Material::~Material(){
+
+}
+
+ColorSource Material::getColorSource(){
+    return m_colorSource;
+}
+
+void Material::setColorSource(ColorSource source){
+    m_colorSource = source;
+}
+
+std::shared_ptr<Texture> Material::getTexture(){
+    return m_texture;
+}
+
+void Material::setTexture(std::shared_ptr<Texture> texture){
+    m_texture = texture;
+}
+
+glm::vec3 Material::getColor(){
+    return m_color;
+}
+
+void Material::setColor(glm::vec3 color){
+    m_color = color;
+}
+
+float Material::getShininess(){
+    return m_shininess;
+}
+
+void Material::setShininess(float shininess){
+    m_shininess = shininess;
+}
diff --git a/engine-ocean/Graphics/material.h b/engine-ocean/Graphics/material.h
new file mode 100644
index 0000000..3434e72
--- /dev/null
+++ b/engine-ocean/Graphics/material.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "GLWrappers/texture.h"
+#include <memory>
+
+#include "glm/glm.hpp"
+
+enum ColorSource{
+    SOLID_COLOR,
+    TEXTURE_COLOR,
+    PER_VERTEX_COLOR
+};
+
+class Material{
+public:
+    Material(glm::vec3 color, float shininess = 1.f); //Constructor for setting SOLID_COLOR based material
+    Material(float shininess = 1.f); //Constructor for setting PER_VERTEX_COLOR based material
+    Material(std::shared_ptr<Texture> texture, float shininess = 1.f); //Constructor for setting TEXTURE_COLOR based material
+    ~Material();
+
+    // Functions for setting uniforms
+    ColorSource getColorSource();
+    void setColorSource(ColorSource source);
+    std::shared_ptr<Texture> getTexture();
+    void setTexture(std::shared_ptr<Texture> texture);
+    glm::vec3 getColor();
+    void setColor(glm::vec3 color);
+    float getShininess();
+    void setShininess(float shininess);
+
+private:
+    ColorSource m_colorSource;
+    std::shared_ptr<Texture> m_texture;
+    glm::vec3 m_color;
+    float m_shininess;
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/modeltransform.cpp b/engine-ocean/Graphics/modeltransform.cpp
new file mode 100644
index 0000000..895f64d
--- /dev/null
+++ b/engine-ocean/Graphics/modeltransform.cpp
@@ -0,0 +1,90 @@
+#include "modeltransform.h"
+#include <iostream>
+
+ModelTransform::ModelTransform():
+    m_pos(glm::vec3(0)),
+    m_scale(glm::vec3(1)),
+    m_rotation(glm::mat4(1))
+{
+
+}
+
+ModelTransform::~ModelTransform(){
+
+}
+
+void ModelTransform::setPos(glm::vec3 pos){
+    m_pos = pos;
+}
+
+void ModelTransform::translate(glm::vec3 delta) {
+    m_pos += delta;
+}
+
+glm::vec3 ModelTransform::getPos() {
+    return m_pos;
+}
+
+void ModelTransform::setScale(glm::vec3 scale) {
+    m_scale = scale;
+}
+
+void ModelTransform::setScale(float scale) {
+    m_scale = glm::vec3(scale);
+}
+
+void ModelTransform::scale(glm::vec3 scale) {
+    m_scale *= scale;
+}
+
+void ModelTransform::scale(float scale) {
+    m_scale *= scale;
+}
+
+glm::vec3 ModelTransform::getScale() {
+    return m_scale;
+}
+
+void ModelTransform::setRotation(float angle, glm::vec3 axis) {
+    m_rotation = glm::rotate(glm::mat4(1), angle, axis);
+}
+
+void ModelTransform::setRotation(glm::mat4 r) {
+    m_rotation = r;
+}
+
+void ModelTransform::rotate(float angle, glm::vec3 axis) {
+    m_rotation = glm::rotate(m_rotation, angle, axis);
+}
+
+void ModelTransform::rotate(glm::mat4 r) {
+    m_rotation = r * m_rotation;
+}
+
+glm::mat4 ModelTransform::getRotation() {
+    return m_rotation;
+}
+
+//float ModelTransform::getYRotationAngle(){
+//    glm::mat4 rotMat = getRotation();
+//    float ry0 = rotMat[0][2];
+//    float ry1 = rotMat[1][2];
+//    float ry2 = rotMat[2][2];
+
+//    float angley = std::atan2(-ry0, pow((pow(ry1, 2) + pow(ry2,2)), .5));
+//    return angley;
+//}
+
+glm::mat4 ModelTransform::getModelMatrix() {
+    glm::mat4 model = glm::mat4(1);
+    model = glm::translate(model, m_pos);
+    model = model * m_rotation;
+    model = glm::scale(model, m_scale);
+    return model;
+}
+
+void ModelTransform::clear(){
+    m_pos = glm::vec3(0, 0, 0);
+    m_scale = glm::vec3(1, 1, 1);
+    m_rotation = glm::mat4(1);
+}
diff --git a/engine-ocean/Graphics/modeltransform.h b/engine-ocean/Graphics/modeltransform.h
new file mode 100644
index 0000000..46f5b73
--- /dev/null
+++ b/engine-ocean/Graphics/modeltransform.h
@@ -0,0 +1,34 @@
+#pragma once
+
+#include "glm/glm.hpp"
+#include "glm/ext.hpp"
+
+class ModelTransform{
+public:
+    ModelTransform();
+    ~ModelTransform();
+
+    void setPos(glm::vec3 pos);
+    void translate(glm::vec3 delta);
+    glm::vec3 getPos();
+    void setScale(glm::vec3 scale);
+    void setScale(float scale);
+    void scale(glm::vec3 scale);
+    void scale(float scale);
+    glm::vec3 getScale();
+    void setRotation(float angle, glm::vec3 axis);
+    void setRotation(glm::mat4 r);
+    void rotate(float angle, glm::vec3 axis);
+    void rotate(glm::mat4 r);
+    glm::mat4 getRotation();
+    glm::mat4 getModelMatrix();
+    void clear();
+
+    float getYRotationAngle();
+
+
+private:
+    glm::vec3 m_pos;
+    glm::vec3 m_scale;
+    glm::mat4 m_rotation = glm::mat4(1);
+};
diff --git a/engine-ocean/Graphics/shaderloader.h b/engine-ocean/Graphics/shaderloader.h
new file mode 100644
index 0000000..eeb8e8c
--- /dev/null
+++ b/engine-ocean/Graphics/shaderloader.h
@@ -0,0 +1,98 @@
+#pragma once
+
+#include "debug.h"
+
+#include <vector>
+#include <string>
+#include <stdexcept>
+#include <fstream>
+#include <iostream>
+
+class ShaderLoader{
+public:
+    static GLuint createShaderProgram(std::vector<GLenum> shaderTypes, std::vector<const char*> filepaths){
+        // Create and compile shaders
+        std::vector<GLuint> shaderIDs;
+        for(int i = 0; i<shaderTypes.size(); i++){
+            shaderIDs.push_back(createAndCompileShader(shaderTypes[i], filepaths[i]));
+        }
+
+        // Link the shader program
+        GLuint programID = glCreateProgram();
+        for(int i = 0; i<shaderIDs.size(); i++){
+            glAttachShader(programID, shaderIDs[i]);
+        }
+        glLinkProgram(programID);
+
+        // Print the info log if program fails to link
+        GLint status;
+        glGetProgramiv(programID, GL_LINK_STATUS, &status);
+        if(status == GL_FALSE){
+            GLint length;
+            glGetProgramiv(programID, GL_INFO_LOG_LENGTH, &length);
+            std::string log(length, '\0');
+            glGetProgramInfoLog(programID, length, nullptr, &log[0]);
+            glDeleteProgram(programID);
+            throw std::runtime_error(log);
+        }
+
+        // Individual shaders no longer necessary, stored in program
+        for(int i = 0; i<shaderIDs.size(); i++){
+            glDeleteShader(shaderIDs[i]);
+        } 
+
+        std::cout<<"END OF SHADERLOADER"<<std::endl;
+        return programID;
+    }
+
+private:
+    static std::string readFile(const char *filePath) {
+        std::cout<<"READ FILE: "<<std::string(filePath)<<std::endl;
+        std::string content;
+        std::ifstream fileStream(filePath, std::ios::in);
+
+        if(!fileStream.is_open()) {
+            std::string log = "Could not read file "+std::string(filePath)+". File does not exist.";
+            throw std::runtime_error(log);
+            return "";
+        }
+
+        std::string line = "";
+        while(std::getline(fileStream, line)) {
+            content.append(line + "\n");
+        }
+
+        fileStream.close();
+
+        return content;
+    }
+
+    static GLuint createAndCompileShader(GLenum shaderType, const char* filepath){
+        std::cout<<"CREATE AND COMPILE SHADER: "<<shaderType<<std::endl;
+        GLuint shaderID = glCreateShader(shaderType);
+
+        // Read shader file
+        std::string shaderStr = readFile(filepath);
+        const char* shaderSrc = shaderStr.c_str();
+
+        std::cout<<"GL SHADER SOURCE"<<std::endl;
+        glShaderSource(shaderID, 1, &shaderSrc, NULL);
+
+        std::cout<<"GL COMPILE SHADER: "<<shaderID<<std::endl;
+        glCompileShader(shaderID);
+
+        // Print info log if shader fails to compile
+        GLint status;
+        glGetShaderiv(shaderID, GL_COMPILE_STATUS, &status);
+        if(status == GL_FALSE){
+            GLint length;
+            glGetShaderiv(shaderID, GL_INFO_LOG_LENGTH, &length);
+            std::string log(length, '\0');
+            glGetShaderInfoLog(shaderID, length, nullptr, &log[0]);
+            glDeleteShader(shaderID);
+            throw std::runtime_error(log);
+        }
+
+        return shaderID;
+    }
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/shape.cpp b/engine-ocean/Graphics/shape.cpp
new file mode 100644
index 0000000..cd0b9b4
--- /dev/null
+++ b/engine-ocean/Graphics/shape.cpp
@@ -0,0 +1,46 @@
+#include "shape.h"
+#include <Eigen/Dense>
+#include "Graphics/global.h"
+#include "Graphics/material.h"
+#include <iostream>
+
+Shape::Shape(std::shared_ptr<VAO> vao):
+    m_vao(vao)
+{
+
+}
+
+Shape::Shape(std::shared_ptr<VAO> vao, std::shared_ptr<Material> shape_material):
+    m_vao(vao),
+    m_shape_material(shape_material)
+{
+    hasShapeSpecificMaterial = true;
+
+}
+
+Shape::~Shape(){
+
+}
+
+std::shared_ptr<Material> Shape::getShapeMaterial(){
+    if (hasShapeSpecificMaterial){
+       return m_shape_material;
+    }
+    std::cout << "this shape does not have material." << std::endl;
+}
+
+bool Shape::hasMaterial(){
+    return hasShapeSpecificMaterial;
+}
+
+void Shape::draw(){
+    m_vao->draw();
+}
+
+void Shape::updateVAO(const std::vector<Eigen::Vector3f> &vertices, const std::vector<Eigen::Vector3i> &faces){
+
+
+    m_vao = Global::graphics.makeVAOFromData(vertices, faces, true, false).second;
+
+
+}
diff --git a/engine-ocean/Graphics/shape.h b/engine-ocean/Graphics/shape.h
new file mode 100644
index 0000000..6385d2b
--- /dev/null
+++ b/engine-ocean/Graphics/shape.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include "GLWrappers/vao.h"
+#include "Graphics/material.h"
+#include <Eigen/Dense>
+
+class Shape{
+public:
+    Shape(std::shared_ptr<VAO> vao);
+    Shape(std::shared_ptr<VAO> vao, std::shared_ptr<Material> shape_material);
+
+    ~Shape();
+
+    // Draw function
+    void draw();
+    std::shared_ptr<Material> getShapeMaterial();
+    bool hasMaterial();
+    void updateVAO(const std::vector<Eigen::Vector3f> &vertices, const std::vector<Eigen::Vector3i> &faces);
+
+
+
+
+private:
+    std::shared_ptr<VAO> m_vao;
+    std::shared_ptr<Material> m_shape_material;
+    bool hasShapeSpecificMaterial = false;
+};
diff --git a/engine-ocean/Graphics/shapedata.h b/engine-ocean/Graphics/shapedata.h
new file mode 100644
index 0000000..c2ff4b8
--- /dev/null
+++ b/engine-ocean/Graphics/shapedata.h
@@ -0,0 +1,3549 @@
+#pragma once
+
+#include "GL/glew.h"
+#include <vector>
+
+//Quad, Cube, Sphere, Cylinder, and Cone data with pos, norm, uvs
+
+std::vector<GLfloat> quadVertexBufferData = {
+    -0.5f, 0,  0.5f, 0, 1, 0, 0, 0,
+     0.5f, 0,  0.5f, 0, 1, 0, 1, 0,
+     0.5f, 0, -0.5f, 0, 1, 0, 1, 1,
+    -0.5f, 0,  0.5f, 0, 1, 0, 0, 0,
+     0.5f, 0, -0.5f, 0, 1, 0, 1, 1,
+    -0.5f, 0, -0.5f, 0, 1, 0, 0, 1
+};
+
+std::vector<GLfloat> cubeVertexBufferData = {
+    // front
+    -0.5f, -0.5f, 0.5f, 0, 0, 1, 0, 0,
+     0.5f, -0.5f, 0.5f, 0, 0, 1, 1, 0,
+     0.5f,  0.5f, 0.5f, 0, 0, 1, 1, 1,
+    -0.5f, -0.5f, 0.5f, 0, 0, 1, 0, 0,
+     0.5f,  0.5f, 0.5f, 0, 0, 1, 1, 1,
+    -0.5f,  0.5f, 0.5f, 0, 0, 1, 0, 1,
+    // top
+    -0.5f, 0.5f,  0.5f, 0, 1, 0, 0, 0,
+     0.5f, 0.5f,  0.5f, 0, 1, 0, 1, 0,
+     0.5f, 0.5f, -0.5f, 0, 1, 0, 1, 1,
+    -0.5f, 0.5f,  0.5f, 0, 1, 0, 0, 0,
+     0.5f, 0.5f, -0.5f, 0, 1, 0, 1, 1,
+    -0.5f, 0.5f, -0.5f, 0, 1, 0, 0, 1,
+    // back
+     0.5f, -0.5f, -0.5f, 0, 0, -1, 0, 0,
+    -0.5f, -0.5f, -0.5f, 0, 0, -1, 1, 0,
+    -0.5f,  0.5f, -0.5f, 0, 0, -1, 1, 1,
+     0.5f, -0.5f, -0.5f, 0, 0, -1, 0, 0,
+    -0.5f,  0.5f, -0.5f, 0, 0, -1, 1, 1,
+     0.5f,  0.5f, -0.5f, 0, 0, -1, 0, 1,
+    // bottom
+    -0.5f, -0.5f, -0.5f, 0, -1, 0, 0, 0,
+     0.5f, -0.5f, -0.5f, 0, -1, 0, 1, 0,
+     0.5f, -0.5f,  0.5f, 0, -1, 0, 1, 1,
+    -0.5f, -0.5f, -0.5f, 0, -1, 0, 0, 0,
+     0.5f, -0.5f,  0.5f, 0, -1, 0, 1, 1,
+    -0.5f, -0.5f,  0.5f, 0, -1, 0, 0, 1,
+    // left
+    -0.5f, -0.5f, -0.5f, -1, 0, 0, 0, 0,
+    -0.5f, -0.5f,  0.5f, -1, 0, 0, 1, 0,
+    -0.5f,  0.5f,  0.5f, -1, 0, 0, 1, 1,
+    -0.5f, -0.5f, -0.5f, -1, 0, 0, 0, 0,
+    -0.5f,  0.5f,  0.5f, -1, 0, 0, 1, 1,
+    -0.5f,  0.5f, -0.5f, -1, 0, 0, 0, 1,
+    // right
+     0.5f, -0.5f,  0.5f, 1, 0, 0, 0, 0,
+     0.5f, -0.5f, -0.5f, 1, 0, 0, 1, 0,
+     0.5f,  0.5f, -0.5f, 1, 0, 0, 1, 1,
+     0.5f, -0.5f,  0.5f, 1, 0, 0, 0, 0,
+     0.5f,  0.5f, -0.5f, 1, 0, 0, 1, 1,
+     0.5f,  0.5f,  0.5f, 1, 0, 0, 0, 1
+};
+
+std::vector<GLfloat> sphereVertexBufferData = {
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+    0.4, -0.5, 6.99382e-08, 0, -1, 0, -0.1, -0.5, 
+    0.283156, -0.5, -0.205725, 0, -1, 0, -0.216844, -0.705725, 
+    0.4, -0.5, 6.99382e-08, 0, -1, 0, -0.1, -0.5, 
+    0.35, -0.5, 6.11959e-08, 0, -1, 0, -0.15, -0.5, 
+    0.45, -0.4, 7.86805e-08, 0.894427, 0.447214, 1.56387e-07, 0, 0.1, 
+    0.364058, -0.4, -0.264503, 0.723607, 0.447214, -0.525731, 0.1, 0.1, 
+    0.323607, -0.3, -0.235114, 0.723607, 0.447214, -0.525731, 0.1, 0.2, 
+    0.4, -0.3, 6.99382e-08, 0.894427, 0.447214, 1.56387e-07, 0, 0.2, 
+    0.45, -0.4, 7.86805e-08, 0.894427, 0.447214, 1.56387e-07, 0, 0.1, 
+    0.323607, -0.3, -0.235114, 0.723607, 0.447214, -0.525731, 0.1, 0.2, 
+    0.323607, -0.5, -0.235114, 0, -1, 0, -0.176393, -0.735114, 
+    0.364058, -0.5, -0.264503, 0, -1, 0, -0.135942, -0.764503, 
+    0.45, -0.5, 7.86805e-08, 0, -1, 0, -0.05, -0.5, 
+    0.323607, -0.5, -0.235114, 0, -1, 0, -0.176393, -0.735114, 
+    0.45, -0.5, 7.86805e-08, 0, -1, 0, -0.05, -0.5, 
+    0.4, -0.5, 6.99382e-08, 0, -1, 0, -0.1, -0.5, 
+    0.5, -0.5, 8.74228e-08, 0.894427, 0.447214, 1.56387e-07, 0, 0, 
+    0.404509, -0.5, -0.293892, 0.723607, 0.447214, -0.525731, 0.1, 0, 
+    0.364058, -0.4, -0.264503, 0.723607, 0.447214, -0.525731, 0.1, 0.1, 
+    0.45, -0.4, 7.86805e-08, 0.894427, 0.447214, 1.56387e-07, 0, 0.1, 
+    0.5, -0.5, 8.74228e-08, 0.894427, 0.447214, 1.56387e-07, 0, 0, 
+    0.364058, -0.4, -0.264503, 0.723607, 0.447214, -0.525731, 0.1, 0.1, 
+    0.364058, -0.5, -0.264503, 0, -1, 0, -0.135942, -0.764503, 
+    0.404509, -0.5, -0.293892, 0, -1, 0, -0.0954914, -0.793893, 
+    0.5, -0.5, 8.74228e-08, 0, -1, 0, 0, -0.5, 
+    0.364058, -0.5, -0.264503, 0, -1, 0, -0.135942, -0.764503, 
+    0.5, -0.5, 8.74228e-08, 0, -1, 0, 0, -0.5, 
+    0.45, -0.5, 7.86805e-08, 0, -1, 0, -0.05, -0.5
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/textrenderer.cpp b/engine-ocean/Graphics/textrenderer.cpp
new file mode 100644
index 0000000..d5551f9
--- /dev/null
+++ b/engine-ocean/Graphics/textrenderer.cpp
@@ -0,0 +1,87 @@
+#include "textrenderer.h"
+#include "debug.h"
+
+void TextRenderer::initialize(){
+    glGenVertexArrays(1, &m_vao);
+    glGenBuffers(1, &m_vbo);
+    glBindVertexArray(m_vao);
+    glBindBuffer(GL_ARRAY_BUFFER, m_vbo);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 6 * 4, NULL, GL_DYNAMIC_DRAW);
+    glEnableVertexAttribArray(0);
+    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 4 * sizeof(float), 0);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindVertexArray(0);   
+}
+
+void TextRenderer::renderUIText(std::shared_ptr<Font> font, std::string text, glm::vec2 anchorPosition, AnchorPoint anchorPoint, float textBoxWidth, float fontSize, float lineSpacing, glm::vec3 textColor){
+    glActiveTexture(GL_TEXTURE0);
+    glBindVertexArray(m_vao);
+
+    float x = 0;
+    float y = 0;
+
+    float maxY = font->getCharacter(73).size.y * fontSize;
+    float minY = - (font->getCharacter(106).size.y - font->getCharacter(106).bearing.y) * fontSize;
+
+    switch(anchorPoint){
+        case AnchorPoint::TopLeft:
+            x = anchorPosition.x;
+            y = anchorPosition.y - maxY;
+            break;
+        case AnchorPoint::TopCenter:
+            x = anchorPosition.x - textBoxWidth * 0.5f;
+            y = anchorPosition.y - maxY;
+            break;
+        case AnchorPoint::TopRight:
+            x = anchorPosition.x - textBoxWidth;
+            y = anchorPosition.y - maxY;
+            break;
+    }
+
+    float initX = x;
+    float initY = y;
+
+    std::string::const_iterator c;
+    for (c = text.begin(); c != text.end(); c++)
+    {
+        Character ch = font->getCharacter(*c);
+
+        float xpos = x + ch.bearing.x * fontSize;
+        float ypos = y - (ch.size.y - ch.bearing.y) * fontSize;
+
+        float w = ch.size.x * fontSize;
+        float h = ch.size.y * fontSize;
+
+        if(xpos + w > initX + textBoxWidth){
+            x = initX;
+            y -= (1.f + lineSpacing) * (maxY - minY);
+
+            xpos = x + ch.bearing.x * fontSize;
+            ypos = y - (ch.size.y - ch.bearing.y) * fontSize;
+        }
+
+
+        // update VBO for each character
+        float vertices[6][4] = {
+            { xpos,     ypos + h,   0.0f, 0.0f },            
+            { xpos,     ypos,       0.0f, 1.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+
+            { xpos,     ypos + h,   0.0f, 0.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+            { xpos + w, ypos + h,   1.0f, 0.0f }           
+        };
+        // render glyph texture over quad
+        glBindTexture(GL_TEXTURE_2D, ch.textureID);
+        // update content of VBO memory
+        glBindBuffer(GL_ARRAY_BUFFER, m_vbo);
+        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices); 
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        // render quad
+        glDrawArrays(GL_TRIANGLES, 0, 6);
+        // now advance cursors for next glyph (note that advance is number of 1/64 pixels)
+        x += (ch.advance >> 6) * fontSize; // bitshift by 6 to get value in pixels (2^6 = 64)
+    }
+    glBindVertexArray(0);
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
\ No newline at end of file
diff --git a/engine-ocean/Graphics/textrenderer.h b/engine-ocean/Graphics/textrenderer.h
new file mode 100644
index 0000000..604d0ad
--- /dev/null
+++ b/engine-ocean/Graphics/textrenderer.h
@@ -0,0 +1,21 @@
+#pragma once
+
+// Credit to https://learnopengl.com/In-Practice/Text-Rendering
+
+#include "font.h"
+#include <string>
+#include <memory>
+
+enum class AnchorPoint{
+    TopLeft, TopCenter, TopRight
+};
+
+class TextRenderer{
+public:
+    void initialize();
+    void renderUIText(std::shared_ptr<Font> font, std::string text, glm::vec2 anchorPosition, AnchorPoint anchorPoint, float textBoxWidth, float fontSize, float lineSpacing, glm::vec3 textColor);
+
+private:
+    GLuint m_vao;
+    GLuint m_vbo;
+};
\ No newline at end of file
diff --git a/engine-ocean/Graphics/tiny_obj_loader.h b/engine-ocean/Graphics/tiny_obj_loader.h
new file mode 100644
index 0000000..3556710
--- /dev/null
+++ b/engine-ocean/Graphics/tiny_obj_loader.h
@@ -0,0 +1,3477 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2012-Present, Syoyo Fujita and many contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+//
+// version 2.0.0 : Add new object oriented API. 1.x API is still provided.
+//                 * Support line primitive.
+//                 * Support points primitive.
+//                 * Support multiple search path for .mtl(v1 API).
+//                 * Support vertex weight `vw`(as an tinyobj extension)
+//                 * Support escaped whitespece in mtllib
+//                 * Add robust triangulation using Mapbox earcut(TINYOBJLOADER_USE_MAPBOX_EARCUT).
+// version 1.4.0 : Modifed ParseTextureNameAndOption API
+// version 1.3.1 : Make ParseTextureNameAndOption API public
+// version 1.3.0 : Separate warning and error message(breaking API of LoadObj)
+// version 1.2.3 : Added color space extension('-colorspace') to tex opts.
+// version 1.2.2 : Parse multiple group names.
+// version 1.2.1 : Added initial support for line('l') primitive(PR #178)
+// version 1.2.0 : Hardened implementation(#175)
+// version 1.1.1 : Support smoothing groups(#162)
+// version 1.1.0 : Support parsing vertex color(#144)
+// version 1.0.8 : Fix parsing `g` tag just after `usemtl`(#138)
+// version 1.0.7 : Support multiple tex options(#126)
+// version 1.0.6 : Add TINYOBJLOADER_USE_DOUBLE option(#124)
+// version 1.0.5 : Ignore `Tr` when `d` exists in MTL(#43)
+// version 1.0.4 : Support multiple filenames for 'mtllib'(#112)
+// version 1.0.3 : Support parsing texture options(#85)
+// version 1.0.2 : Improve parsing speed by about a factor of 2 for large
+// files(#105)
+// version 1.0.1 : Fixes a shape is lost if obj ends with a 'usemtl'(#104)
+// version 1.0.0 : Change data structure. Change license from BSD to MIT.
+//
+
+//
+// Use this in *one* .cc
+//   #define TINYOBJLOADER_IMPLEMENTATION
+//   #include "tiny_obj_loader.h"
+//
+
+#ifndef TINY_OBJ_LOADER_H_
+#define TINY_OBJ_LOADER_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+namespace tinyobj {
+
+// TODO(syoyo): Better C++11 detection for older compiler
+#if __cplusplus > 199711L
+#define TINYOBJ_OVERRIDE override
+#else
+#define TINYOBJ_OVERRIDE
+#endif
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#if __has_warning("-Wzero-as-null-pointer-constant")
+#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
+#endif
+
+#pragma clang diagnostic ignored "-Wpadded"
+
+#endif
+
+// https://en.wikipedia.org/wiki/Wavefront_.obj_file says ...
+//
+//  -blendu on | off                       # set horizontal texture blending
+//  (default on)
+//  -blendv on | off                       # set vertical texture blending
+//  (default on)
+//  -boost real_value                      # boost mip-map sharpness
+//  -mm base_value gain_value              # modify texture map values (default
+//  0 1)
+//                                         #     base_value = brightness,
+//                                         gain_value = contrast
+//  -o u [v [w]]                           # Origin offset             (default
+//  0 0 0)
+//  -s u [v [w]]                           # Scale                     (default
+//  1 1 1)
+//  -t u [v [w]]                           # Turbulence                (default
+//  0 0 0)
+//  -texres resolution                     # texture resolution to create
+//  -clamp on | off                        # only render texels in the clamped
+//  0-1 range (default off)
+//                                         #   When unclamped, textures are
+//                                         repeated across a surface,
+//                                         #   when clamped, only texels which
+//                                         fall within the 0-1
+//                                         #   range are rendered.
+//  -bm mult_value                         # bump multiplier (for bump maps
+//  only)
+//
+//  -imfchan r | g | b | m | l | z         # specifies which channel of the file
+//  is used to
+//                                         # create a scalar or bump texture.
+//                                         r:red, g:green,
+//                                         # b:blue, m:matte, l:luminance,
+//                                         z:z-depth..
+//                                         # (the default for bump is 'l' and
+//                                         for decal is 'm')
+//  bump -imfchan r bumpmap.tga            # says to use the red channel of
+//  bumpmap.tga as the bumpmap
+//
+// For reflection maps...
+//
+//   -type sphere                           # specifies a sphere for a "refl"
+//   reflection map
+//   -type cube_top    | cube_bottom |      # when using a cube map, the texture
+//   file for each
+//         cube_front  | cube_back   |      # side of the cube is specified
+//         separately
+//         cube_left   | cube_right
+//
+// TinyObjLoader extension.
+//
+//   -colorspace SPACE                      # Color space of the texture. e.g.
+//   'sRGB` or 'linear'
+//
+
+#ifdef TINYOBJLOADER_USE_DOUBLE
+//#pragma message "using double"
+typedef double real_t;
+#else
+//#pragma message "using float"
+typedef float real_t;
+#endif
+
+typedef enum {
+  TEXTURE_TYPE_NONE,  // default
+  TEXTURE_TYPE_SPHERE,
+  TEXTURE_TYPE_CUBE_TOP,
+  TEXTURE_TYPE_CUBE_BOTTOM,
+  TEXTURE_TYPE_CUBE_FRONT,
+  TEXTURE_TYPE_CUBE_BACK,
+  TEXTURE_TYPE_CUBE_LEFT,
+  TEXTURE_TYPE_CUBE_RIGHT
+} texture_type_t;
+
+struct texture_option_t {
+  texture_type_t type;      // -type (default TEXTURE_TYPE_NONE)
+  real_t sharpness;         // -boost (default 1.0?)
+  real_t brightness;        // base_value in -mm option (default 0)
+  real_t contrast;          // gain_value in -mm option (default 1)
+  real_t origin_offset[3];  // -o u [v [w]] (default 0 0 0)
+  real_t scale[3];          // -s u [v [w]] (default 1 1 1)
+  real_t turbulence[3];     // -t u [v [w]] (default 0 0 0)
+  int texture_resolution;   // -texres resolution (No default value in the spec.
+                            // We'll use -1)
+  bool clamp;               // -clamp (default false)
+  char imfchan;  // -imfchan (the default for bump is 'l' and for decal is 'm')
+  bool blendu;   // -blendu (default on)
+  bool blendv;   // -blendv (default on)
+  real_t bump_multiplier;  // -bm (for bump maps only, default 1.0)
+
+  // extension
+  std::string colorspace;  // Explicitly specify color space of stored texel
+                           // value. Usually `sRGB` or `linear` (default empty).
+};
+
+struct material_t {
+  std::string name;
+
+  real_t ambient[3];
+  real_t diffuse[3];
+  real_t specular[3];
+  real_t transmittance[3];
+  real_t emission[3];
+  real_t shininess;
+  real_t ior;       // index of refraction
+  real_t dissolve;  // 1 == opaque; 0 == fully transparent
+  // illumination model (see http://www.fileformat.info/format/material/)
+  int illum;
+
+  int dummy;  // Suppress padding warning.
+
+  std::string ambient_texname;             // map_Ka. For ambient or ambient occlusion.
+  std::string diffuse_texname;             // map_Kd
+  std::string specular_texname;            // map_Ks
+  std::string specular_highlight_texname;  // map_Ns
+  std::string bump_texname;                // map_bump, map_Bump, bump
+  std::string displacement_texname;        // disp
+  std::string alpha_texname;               // map_d
+  std::string reflection_texname;          // refl
+
+  texture_option_t ambient_texopt;
+  texture_option_t diffuse_texopt;
+  texture_option_t specular_texopt;
+  texture_option_t specular_highlight_texopt;
+  texture_option_t bump_texopt;
+  texture_option_t displacement_texopt;
+  texture_option_t alpha_texopt;
+  texture_option_t reflection_texopt;
+
+  // PBR extension
+  // http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr
+  real_t roughness;            // [0, 1] default 0
+  real_t metallic;             // [0, 1] default 0
+  real_t sheen;                // [0, 1] default 0
+  real_t clearcoat_thickness;  // [0, 1] default 0
+  real_t clearcoat_roughness;  // [0, 1] default 0
+  real_t anisotropy;           // aniso. [0, 1] default 0
+  real_t anisotropy_rotation;  // anisor. [0, 1] default 0
+  real_t pad0;
+  std::string roughness_texname;  // map_Pr
+  std::string metallic_texname;   // map_Pm
+  std::string sheen_texname;      // map_Ps
+  std::string emissive_texname;   // map_Ke
+  std::string normal_texname;     // norm. For normal mapping.
+
+  texture_option_t roughness_texopt;
+  texture_option_t metallic_texopt;
+  texture_option_t sheen_texopt;
+  texture_option_t emissive_texopt;
+  texture_option_t normal_texopt;
+
+  int pad2;
+
+  std::map<std::string, std::string> unknown_parameter;
+
+#ifdef TINY_OBJ_LOADER_PYTHON_BINDING
+  // For pybind11
+  std::array<double, 3> GetDiffuse() {
+    std::array<double, 3> values;
+    values[0] = double(diffuse[0]);
+    values[1] = double(diffuse[1]);
+    values[2] = double(diffuse[2]);
+
+    return values;
+  }
+
+  std::array<double, 3> GetSpecular() {
+    std::array<double, 3> values;
+    values[0] = double(specular[0]);
+    values[1] = double(specular[1]);
+    values[2] = double(specular[2]);
+
+    return values;
+  }
+
+  std::array<double, 3> GetTransmittance() {
+    std::array<double, 3> values;
+    values[0] = double(transmittance[0]);
+    values[1] = double(transmittance[1]);
+    values[2] = double(transmittance[2]);
+
+    return values;
+  }
+
+  std::array<double, 3> GetEmission() {
+    std::array<double, 3> values;
+    values[0] = double(emission[0]);
+    values[1] = double(emission[1]);
+    values[2] = double(emission[2]);
+
+    return values;
+  }
+
+  std::array<double, 3> GetAmbient() {
+    std::array<double, 3> values;
+    values[0] = double(ambient[0]);
+    values[1] = double(ambient[1]);
+    values[2] = double(ambient[2]);
+
+    return values;
+  }
+
+  void SetDiffuse(std::array<double, 3> &a) {
+    diffuse[0] = real_t(a[0]);
+    diffuse[1] = real_t(a[1]);
+    diffuse[2] = real_t(a[2]);
+  }
+
+  void SetAmbient(std::array<double, 3> &a) {
+    ambient[0] = real_t(a[0]);
+    ambient[1] = real_t(a[1]);
+    ambient[2] = real_t(a[2]);
+  }
+
+  void SetSpecular(std::array<double, 3> &a) {
+    specular[0] = real_t(a[0]);
+    specular[1] = real_t(a[1]);
+    specular[2] = real_t(a[2]);
+  }
+
+  void SetTransmittance(std::array<double, 3> &a) {
+    transmittance[0] = real_t(a[0]);
+    transmittance[1] = real_t(a[1]);
+    transmittance[2] = real_t(a[2]);
+  }
+
+  std::string GetCustomParameter(const std::string &key) {
+    std::map<std::string, std::string>::const_iterator it =
+        unknown_parameter.find(key);
+
+    if (it != unknown_parameter.end()) {
+      return it->second;
+    }
+    return std::string();
+  }
+
+#endif
+};
+
+struct tag_t {
+  std::string name;
+
+  std::vector<int> intValues;
+  std::vector<real_t> floatValues;
+  std::vector<std::string> stringValues;
+};
+
+struct joint_and_weight_t {
+  int joint_id;
+  real_t weight;
+};
+
+struct skin_weight_t {
+  int vertex_id;  // Corresponding vertex index in `attrib_t::vertices`.
+                  // Compared to `index_t`, this index must be positive and
+                  // start with 0(does not allow relative indexing)
+  std::vector<joint_and_weight_t> weightValues;
+};
+
+// Index struct to support different indices for vtx/normal/texcoord.
+// -1 means not used.
+struct index_t {
+  int vertex_index;
+  int normal_index;
+  int texcoord_index;
+};
+
+struct mesh_t {
+  std::vector<index_t> indices;
+  std::vector<unsigned char>
+      num_face_vertices;          // The number of vertices per
+                                  // face. 3 = triangle, 4 = quad,
+                                  // ... Up to 255 vertices per face.
+  std::vector<int> material_ids;  // per-face material ID
+  std::vector<unsigned int> smoothing_group_ids;  // per-face smoothing group
+                                                  // ID(0 = off. positive value
+                                                  // = group id)
+  std::vector<tag_t> tags;                        // SubD tag
+};
+
+// struct path_t {
+//  std::vector<int> indices;  // pairs of indices for lines
+//};
+
+struct lines_t {
+  // Linear flattened indices.
+  std::vector<index_t> indices;        // indices for vertices(poly lines)
+  std::vector<int> num_line_vertices;  // The number of vertices per line.
+};
+
+struct points_t {
+  std::vector<index_t> indices;  // indices for points
+};
+
+struct shape_t {
+  std::string name;
+  mesh_t mesh;
+  lines_t lines;
+  points_t points;
+};
+
+// Vertex attributes
+struct attrib_t {
+  std::vector<real_t> vertices;  // 'v'(xyz)
+
+  // For backward compatibility, we store vertex weight in separate array.
+  std::vector<real_t> vertex_weights;  // 'v'(w)
+  std::vector<real_t> normals;         // 'vn'
+  std::vector<real_t> texcoords;       // 'vt'(uv)
+
+  // For backward compatibility, we store texture coordinate 'w' in separate
+  // array.
+  std::vector<real_t> texcoord_ws;  // 'vt'(w)
+  std::vector<real_t> colors;       // extension: vertex colors
+
+  //
+  // TinyObj extension.
+  //
+
+  // NOTE(syoyo): array index is based on the appearance order.
+  // To get a corresponding skin weight for a specific vertex id `vid`,
+  // Need to reconstruct a look up table: `skin_weight_t::vertex_id` == `vid`
+  // (e.g. using std::map, std::unordered_map)
+  std::vector<skin_weight_t> skin_weights;
+
+  attrib_t() {}
+
+  //
+  // For pybind11
+  //
+  const std::vector<real_t> &GetVertices() const { return vertices; }
+
+  const std::vector<real_t> &GetVertexWeights() const { return vertex_weights; }
+};
+
+struct callback_t {
+  // W is optional and set to 1 if there is no `w` item in `v` line
+  void (*vertex_cb)(void *user_data, real_t x, real_t y, real_t z, real_t w);
+  void (*vertex_color_cb)(void *user_data, real_t x, real_t y, real_t z,
+                          real_t r, real_t g, real_t b, bool has_color);
+  void (*normal_cb)(void *user_data, real_t x, real_t y, real_t z);
+
+  // y and z are optional and set to 0 if there is no `y` and/or `z` item(s) in
+  // `vt` line.
+  void (*texcoord_cb)(void *user_data, real_t x, real_t y, real_t z);
+
+  // called per 'f' line. num_indices is the number of face indices(e.g. 3 for
+  // triangle, 4 for quad)
+  // 0 will be passed for undefined index in index_t members.
+  void (*index_cb)(void *user_data, index_t *indices, int num_indices);
+  // `name` material name, `material_id` = the array index of material_t[]. -1
+  // if
+  // a material not found in .mtl
+  void (*usemtl_cb)(void *user_data, const char *name, int material_id);
+  // `materials` = parsed material data.
+  void (*mtllib_cb)(void *user_data, const material_t *materials,
+                    int num_materials);
+  // There may be multiple group names
+  void (*group_cb)(void *user_data, const char **names, int num_names);
+  void (*object_cb)(void *user_data, const char *name);
+
+  callback_t()
+      : vertex_cb(NULL),
+        vertex_color_cb(NULL),
+        normal_cb(NULL),
+        texcoord_cb(NULL),
+        index_cb(NULL),
+        usemtl_cb(NULL),
+        mtllib_cb(NULL),
+        group_cb(NULL),
+        object_cb(NULL) {}
+};
+
+class MaterialReader {
+ public:
+  MaterialReader() {}
+  virtual ~MaterialReader();
+
+  virtual bool operator()(const std::string &matId,
+                          std::vector<material_t> *materials,
+                          std::map<std::string, int> *matMap, std::string *warn,
+                          std::string *err) = 0;
+};
+
+///
+/// Read .mtl from a file.
+///
+class MaterialFileReader : public MaterialReader {
+ public:
+  // Path could contain separator(';' in Windows, ':' in Posix)
+  explicit MaterialFileReader(const std::string &mtl_basedir)
+      : m_mtlBaseDir(mtl_basedir) {}
+  virtual ~MaterialFileReader() TINYOBJ_OVERRIDE {}
+  virtual bool operator()(const std::string &matId,
+                          std::vector<material_t> *materials,
+                          std::map<std::string, int> *matMap, std::string *warn,
+                          std::string *err) TINYOBJ_OVERRIDE;
+
+ private:
+  std::string m_mtlBaseDir;
+};
+
+///
+/// Read .mtl from a stream.
+///
+class MaterialStreamReader : public MaterialReader {
+ public:
+  explicit MaterialStreamReader(std::istream &inStream)
+      : m_inStream(inStream) {}
+  virtual ~MaterialStreamReader() TINYOBJ_OVERRIDE {}
+  virtual bool operator()(const std::string &matId,
+                          std::vector<material_t> *materials,
+                          std::map<std::string, int> *matMap, std::string *warn,
+                          std::string *err) TINYOBJ_OVERRIDE;
+
+ private:
+  std::istream &m_inStream;
+};
+
+// v2 API
+struct ObjReaderConfig {
+  bool triangulate;  // triangulate polygon?
+
+  // Currently not used.
+  // "simple" or empty: Create triangle fan
+  // "earcut": Use the algorithm based on Ear clipping
+  std::string triangulation_method;
+
+  /// Parse vertex color.
+  /// If vertex color is not present, its filled with default value.
+  /// false = no vertex color
+  /// This will increase memory of parsed .obj
+  bool vertex_color;
+
+  ///
+  /// Search path to .mtl file.
+  /// Default = "" = search from the same directory of .obj file.
+  /// Valid only when loading .obj from a file.
+  ///
+  std::string mtl_search_path;
+
+  ObjReaderConfig()
+      : triangulate(true), triangulation_method("simple"), vertex_color(true) {}
+};
+
+///
+/// Wavefront .obj reader class(v2 API)
+///
+class ObjReader {
+ public:
+  ObjReader() : valid_(false) {}
+
+  ///
+  /// Load .obj and .mtl from a file.
+  ///
+  /// @param[in] filename wavefront .obj filename
+  /// @param[in] config Reader configuration
+  ///
+  bool ParseFromFile(const std::string &filename,
+                     const ObjReaderConfig &config = ObjReaderConfig());
+
+  ///
+  /// Parse .obj from a text string.
+  /// Need to supply .mtl text string by `mtl_text`.
+  /// This function ignores `mtllib` line in .obj text.
+  ///
+  /// @param[in] obj_text wavefront .obj filename
+  /// @param[in] mtl_text wavefront .mtl filename
+  /// @param[in] config Reader configuration
+  ///
+  bool ParseFromString(const std::string &obj_text, const std::string &mtl_text,
+                       const ObjReaderConfig &config = ObjReaderConfig());
+
+  ///
+  /// .obj was loaded or parsed correctly.
+  ///
+  bool Valid() const { return valid_; }
+
+  const attrib_t &GetAttrib() const { return attrib_; }
+
+  const std::vector<shape_t> &GetShapes() const { return shapes_; }
+
+  const std::vector<material_t> &GetMaterials() const { return materials_; }
+
+  ///
+  /// Warning message(may be filled after `Load` or `Parse`)
+  ///
+  const std::string &Warning() const { return warning_; }
+
+  ///
+  /// Error message(filled when `Load` or `Parse` failed)
+  ///
+  const std::string &Error() const { return error_; }
+
+ private:
+  bool valid_;
+
+  attrib_t attrib_;
+  std::vector<shape_t> shapes_;
+  std::vector<material_t> materials_;
+
+  std::string warning_;
+  std::string error_;
+};
+
+/// ==>>========= Legacy v1 API =============================================
+
+/// Loads .obj from a file.
+/// 'attrib', 'shapes' and 'materials' will be filled with parsed shape data
+/// 'shapes' will be filled with parsed shape data
+/// Returns true when loading .obj become success.
+/// Returns warning message into `warn`, and error message into `err`
+/// 'mtl_basedir' is optional, and used for base directory for .mtl file.
+/// In default(`NULL'), .mtl file is searched from an application's working
+/// directory.
+/// 'triangulate' is optional, and used whether triangulate polygon face in .obj
+/// or not.
+/// Option 'default_vcols_fallback' specifies whether vertex colors should
+/// always be defined, even if no colors are given (fallback to white).
+bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,
+             std::vector<material_t> *materials, std::string *warn,
+             std::string *err, const char *filename,
+             const char *mtl_basedir = NULL, bool triangulate = true,
+             bool default_vcols_fallback = true);
+
+/// Loads .obj from a file with custom user callback.
+/// .mtl is loaded as usual and parsed material_t data will be passed to
+/// `callback.mtllib_cb`.
+/// Returns true when loading .obj/.mtl become success.
+/// Returns warning message into `warn`, and error message into `err`
+/// See `examples/callback_api/` for how to use this function.
+bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback,
+                         void *user_data = NULL,
+                         MaterialReader *readMatFn = NULL,
+                         std::string *warn = NULL, std::string *err = NULL);
+
+/// Loads object from a std::istream, uses `readMatFn` to retrieve
+/// std::istream for materials.
+/// Returns true when loading .obj become success.
+/// Returns warning and error message into `err`
+bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,
+             std::vector<material_t> *materials, std::string *warn,
+             std::string *err, std::istream *inStream,
+             MaterialReader *readMatFn = NULL, bool triangulate = true,
+             bool default_vcols_fallback = true);
+
+/// Loads materials into std::map
+void LoadMtl(std::map<std::string, int> *material_map,
+             std::vector<material_t> *materials, std::istream *inStream,
+             std::string *warning, std::string *err);
+
+///
+/// Parse texture name and texture option for custom texture parameter through
+/// material::unknown_parameter
+///
+/// @param[out] texname Parsed texture name
+/// @param[out] texopt Parsed texopt
+/// @param[in] linebuf Input string
+///
+bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt,
+                               const char *linebuf);
+
+/// =<<========== Legacy v1 API =============================================
+
+}  // namespace tinyobj
+
+#endif  // TINY_OBJ_LOADER_H_
+
+#ifdef TINYOBJLOADER_IMPLEMENTATION
+#include <cassert>
+#include <cctype>
+#include <cmath>
+#include <cstddef>
+#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <limits>
+#include <set>
+#include <sstream>
+#include <utility>
+
+#ifdef TINYOBJLOADER_USE_MAPBOX_EARCUT
+
+#ifdef TINYOBJLOADER_DONOT_INCLUDE_MAPBOX_EARCUT
+// Assume earcut.hpp is included outside of tiny_obj_loader.h
+#else
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Weverything"
+#endif
+
+#include <array>
+#include "mapbox/earcut.hpp"
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+#endif
+
+#endif  // TINYOBJLOADER_USE_MAPBOX_EARCUT
+
+namespace tinyobj {
+
+MaterialReader::~MaterialReader() {}
+
+struct vertex_index_t {
+  int v_idx, vt_idx, vn_idx;
+  vertex_index_t() : v_idx(-1), vt_idx(-1), vn_idx(-1) {}
+  explicit vertex_index_t(int idx) : v_idx(idx), vt_idx(idx), vn_idx(idx) {}
+  vertex_index_t(int vidx, int vtidx, int vnidx)
+      : v_idx(vidx), vt_idx(vtidx), vn_idx(vnidx) {}
+};
+
+// Internal data structure for face representation
+// index + smoothing group.
+struct face_t {
+  unsigned int
+      smoothing_group_id;  // smoothing group id. 0 = smoothing groupd is off.
+  int pad_;
+  std::vector<vertex_index_t> vertex_indices;  // face vertex indices.
+
+  face_t() : smoothing_group_id(0), pad_(0) {}
+};
+
+// Internal data structure for line representation
+struct __line_t {
+  // l v1/vt1 v2/vt2 ...
+  // In the specification, line primitrive does not have normal index, but
+  // TinyObjLoader allow it
+  std::vector<vertex_index_t> vertex_indices;
+};
+
+// Internal data structure for points representation
+struct __points_t {
+  // p v1 v2 ...
+  // In the specification, point primitrive does not have normal index and
+  // texture coord index, but TinyObjLoader allow it.
+  std::vector<vertex_index_t> vertex_indices;
+};
+
+struct tag_sizes {
+  tag_sizes() : num_ints(0), num_reals(0), num_strings(0) {}
+  int num_ints;
+  int num_reals;
+  int num_strings;
+};
+
+struct obj_shape {
+  std::vector<real_t> v;
+  std::vector<real_t> vn;
+  std::vector<real_t> vt;
+};
+
+//
+// Manages group of primitives(face, line, points, ...)
+struct PrimGroup {
+  std::vector<face_t> faceGroup;
+  std::vector<__line_t> lineGroup;
+  std::vector<__points_t> pointsGroup;
+
+  void clear() {
+    faceGroup.clear();
+    lineGroup.clear();
+    pointsGroup.clear();
+  }
+
+  bool IsEmpty() const {
+    return faceGroup.empty() && lineGroup.empty() && pointsGroup.empty();
+  }
+
+  // TODO(syoyo): bspline, surface, ...
+};
+
+// See
+// http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf
+static std::istream &safeGetline(std::istream &is, std::string &t) {
+  t.clear();
+
+  // The characters in the stream are read one-by-one using a std::streambuf.
+  // That is faster than reading them one-by-one using the std::istream.
+  // Code that uses streambuf this way must be guarded by a sentry object.
+  // The sentry object performs various tasks,
+  // such as thread synchronization and updating the stream state.
+
+  std::istream::sentry se(is, true);
+  std::streambuf *sb = is.rdbuf();
+
+  if (se) {
+    for (;;) {
+      int c = sb->sbumpc();
+      switch (c) {
+        case '\n':
+          return is;
+        case '\r':
+          if (sb->sgetc() == '\n') sb->sbumpc();
+          return is;
+        case EOF:
+          // Also handle the case when the last line has no line ending
+          if (t.empty()) is.setstate(std::ios::eofbit);
+          return is;
+        default:
+          t += static_cast<char>(c);
+      }
+    }
+  }
+
+  return is;
+}
+
+#define IS_SPACE(x) (((x) == ' ') || ((x) == '\t'))
+#define IS_DIGIT(x) \
+  (static_cast<unsigned int>((x) - '0') < static_cast<unsigned int>(10))
+#define IS_NEW_LINE(x) (((x) == '\r') || ((x) == '\n') || ((x) == '\0'))
+
+template <typename T>
+static inline std::string toString(const T &t) {
+  std::stringstream ss;
+  ss << t;
+  return ss.str();
+}
+
+struct warning_context
+{
+    std::string *warn;
+    size_t line_number;
+};
+
+// Make index zero-base, and also support relative index.
+static inline bool fixIndex(int idx, int n, int *ret, bool allow_zero, const warning_context &context) {
+  if (!ret) {
+    return false;
+  }
+
+  if (idx > 0) {
+    (*ret) = idx - 1;
+    return true;
+  }
+
+  if (idx == 0) {
+    // zero is not allowed according to the spec.
+    if (context.warn) {
+      (*context.warn) += "A zero value index found (will have a value of -1 for normal and tex indices. Line "
+          + toString(context.line_number) + ").\n";
+    }
+
+    (*ret) = idx - 1;
+    return allow_zero;
+  }
+
+  if (idx < 0) {
+    (*ret) = n + idx;  // negative value = relative
+    if((*ret) < 0){
+      return false;  // invalid relative index
+    }
+    return true;
+  }
+
+  return false;  // never reach here.
+}
+
+static inline std::string parseString(const char **token) {
+  std::string s;
+  (*token) += strspn((*token), " \t");
+  size_t e = strcspn((*token), " \t\r");
+  s = std::string((*token), &(*token)[e]);
+  (*token) += e;
+  return s;
+}
+
+static inline int parseInt(const char **token) {
+  (*token) += strspn((*token), " \t");
+  int i = atoi((*token));
+  (*token) += strcspn((*token), " \t\r");
+  return i;
+}
+
+// Tries to parse a floating point number located at s.
+//
+// s_end should be a location in the string where reading should absolutely
+// stop. For example at the end of the string, to prevent buffer overflows.
+//
+// Parses the following EBNF grammar:
+//   sign    = "+" | "-" ;
+//   END     = ? anything not in digit ?
+//   digit   = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
+//   integer = [sign] , digit , {digit} ;
+//   decimal = integer , ["." , integer] ;
+//   float   = ( decimal , END ) | ( decimal , ("E" | "e") , integer , END ) ;
+//
+//  Valid strings are for example:
+//   -0  +3.1417e+2  -0.0E-3  1.0324  -1.41   11e2
+//
+// If the parsing is a success, result is set to the parsed value and true
+// is returned.
+//
+// The function is greedy and will parse until any of the following happens:
+//  - a non-conforming character is encountered.
+//  - s_end is reached.
+//
+// The following situations triggers a failure:
+//  - s >= s_end.
+//  - parse failure.
+//
+static bool tryParseDouble(const char *s, const char *s_end, double *result) {
+  if (s >= s_end) {
+    return false;
+  }
+
+  double mantissa = 0.0;
+  // This exponent is base 2 rather than 10.
+  // However the exponent we parse is supposed to be one of ten,
+  // thus we must take care to convert the exponent/and or the
+  // mantissa to a * 2^E, where a is the mantissa and E is the
+  // exponent.
+  // To get the final double we will use ldexp, it requires the
+  // exponent to be in base 2.
+  int exponent = 0;
+
+  // NOTE: THESE MUST BE DECLARED HERE SINCE WE ARE NOT ALLOWED
+  // TO JUMP OVER DEFINITIONS.
+  char sign = '+';
+  char exp_sign = '+';
+  char const *curr = s;
+
+  // How many characters were read in a loop.
+  int read = 0;
+  // Tells whether a loop terminated due to reaching s_end.
+  bool end_not_reached = false;
+  bool leading_decimal_dots = false;
+
+  /*
+          BEGIN PARSING.
+  */
+
+  // Find out what sign we've got.
+  if (*curr == '+' || *curr == '-') {
+    sign = *curr;
+    curr++;
+    if ((curr != s_end) && (*curr == '.')) {
+      // accept. Somethig like `.7e+2`, `-.5234`
+      leading_decimal_dots = true;
+    }
+  } else if (IS_DIGIT(*curr)) { /* Pass through. */
+  } else if (*curr == '.') {
+    // accept. Somethig like `.7e+2`, `-.5234`
+    leading_decimal_dots = true;
+  } else {
+    goto fail;
+  }
+
+  // Read the integer part.
+  end_not_reached = (curr != s_end);
+  if (!leading_decimal_dots) {
+    while (end_not_reached && IS_DIGIT(*curr)) {
+      mantissa *= 10;
+      mantissa += static_cast<int>(*curr - 0x30);
+      curr++;
+      read++;
+      end_not_reached = (curr != s_end);
+    }
+
+    // We must make sure we actually got something.
+    if (read == 0) goto fail;
+  }
+
+  // We allow numbers of form "#", "###" etc.
+  if (!end_not_reached) goto assemble;
+
+  // Read the decimal part.
+  if (*curr == '.') {
+    curr++;
+    read = 1;
+    end_not_reached = (curr != s_end);
+    while (end_not_reached && IS_DIGIT(*curr)) {
+      static const double pow_lut[] = {
+          1.0, 0.1, 0.01, 0.001, 0.0001, 0.00001, 0.000001, 0.0000001,
+      };
+      const int lut_entries = sizeof pow_lut / sizeof pow_lut[0];
+
+      // NOTE: Don't use powf here, it will absolutely murder precision.
+      mantissa += static_cast<int>(*curr - 0x30) *
+                  (read < lut_entries ? pow_lut[read] : std::pow(10.0, -read));
+      read++;
+      curr++;
+      end_not_reached = (curr != s_end);
+    }
+  } else if (*curr == 'e' || *curr == 'E') {
+  } else {
+    goto assemble;
+  }
+
+  if (!end_not_reached) goto assemble;
+
+  // Read the exponent part.
+  if (*curr == 'e' || *curr == 'E') {
+    curr++;
+    // Figure out if a sign is present and if it is.
+    end_not_reached = (curr != s_end);
+    if (end_not_reached && (*curr == '+' || *curr == '-')) {
+      exp_sign = *curr;
+      curr++;
+    } else if (IS_DIGIT(*curr)) { /* Pass through. */
+    } else {
+      // Empty E is not allowed.
+      goto fail;
+    }
+
+    read = 0;
+    end_not_reached = (curr != s_end);
+    while (end_not_reached && IS_DIGIT(*curr)) {
+      // To avoid annoying MSVC's min/max macro definiton,
+      // Use hardcoded int max value
+      if (exponent > (2147483647/10)) { // 2147483647 = std::numeric_limits<int>::max()
+        // Integer overflow
+        goto fail;
+      }
+      exponent *= 10;
+      exponent += static_cast<int>(*curr - 0x30);
+      curr++;
+      read++;
+      end_not_reached = (curr != s_end);
+    }
+    exponent *= (exp_sign == '+' ? 1 : -1);
+    if (read == 0) goto fail;
+  }
+
+assemble:
+  *result = (sign == '+' ? 1 : -1) *
+            (exponent ? std::ldexp(mantissa * std::pow(5.0, exponent), exponent)
+                      : mantissa);
+  return true;
+fail:
+  return false;
+}
+
+static inline real_t parseReal(const char **token, double default_value = 0.0) {
+  (*token) += strspn((*token), " \t");
+  const char *end = (*token) + strcspn((*token), " \t\r");
+  double val = default_value;
+  tryParseDouble((*token), end, &val);
+  real_t f = static_cast<real_t>(val);
+  (*token) = end;
+  return f;
+}
+
+static inline bool parseReal(const char **token, real_t *out) {
+  (*token) += strspn((*token), " \t");
+  const char *end = (*token) + strcspn((*token), " \t\r");
+  double val;
+  bool ret = tryParseDouble((*token), end, &val);
+  if (ret) {
+    real_t f = static_cast<real_t>(val);
+    (*out) = f;
+  }
+  (*token) = end;
+  return ret;
+}
+
+static inline void parseReal2(real_t *x, real_t *y, const char **token,
+                              const double default_x = 0.0,
+                              const double default_y = 0.0) {
+  (*x) = parseReal(token, default_x);
+  (*y) = parseReal(token, default_y);
+}
+
+static inline void parseReal3(real_t *x, real_t *y, real_t *z,
+                              const char **token, const double default_x = 0.0,
+                              const double default_y = 0.0,
+                              const double default_z = 0.0) {
+  (*x) = parseReal(token, default_x);
+  (*y) = parseReal(token, default_y);
+  (*z) = parseReal(token, default_z);
+}
+
+static inline void parseV(real_t *x, real_t *y, real_t *z, real_t *w,
+                          const char **token, const double default_x = 0.0,
+                          const double default_y = 0.0,
+                          const double default_z = 0.0,
+                          const double default_w = 1.0) {
+  (*x) = parseReal(token, default_x);
+  (*y) = parseReal(token, default_y);
+  (*z) = parseReal(token, default_z);
+  (*w) = parseReal(token, default_w);
+}
+
+// Extension: parse vertex with colors(6 items)
+static inline bool parseVertexWithColor(real_t *x, real_t *y, real_t *z,
+                                        real_t *r, real_t *g, real_t *b,
+                                        const char **token,
+                                        const double default_x = 0.0,
+                                        const double default_y = 0.0,
+                                        const double default_z = 0.0) {
+  (*x) = parseReal(token, default_x);
+  (*y) = parseReal(token, default_y);
+  (*z) = parseReal(token, default_z);
+
+  const bool found_color =
+      parseReal(token, r) && parseReal(token, g) && parseReal(token, b);
+
+  if (!found_color) {
+    (*r) = (*g) = (*b) = 1.0;
+  }
+
+  return found_color;
+}
+
+static inline bool parseOnOff(const char **token, bool default_value = true) {
+  (*token) += strspn((*token), " \t");
+  const char *end = (*token) + strcspn((*token), " \t\r");
+
+  bool ret = default_value;
+  if ((0 == strncmp((*token), "on", 2))) {
+    ret = true;
+  } else if ((0 == strncmp((*token), "off", 3))) {
+    ret = false;
+  }
+
+  (*token) = end;
+  return ret;
+}
+
+static inline texture_type_t parseTextureType(
+    const char **token, texture_type_t default_value = TEXTURE_TYPE_NONE) {
+  (*token) += strspn((*token), " \t");
+  const char *end = (*token) + strcspn((*token), " \t\r");
+  texture_type_t ty = default_value;
+
+  if ((0 == strncmp((*token), "cube_top", strlen("cube_top")))) {
+    ty = TEXTURE_TYPE_CUBE_TOP;
+  } else if ((0 == strncmp((*token), "cube_bottom", strlen("cube_bottom")))) {
+    ty = TEXTURE_TYPE_CUBE_BOTTOM;
+  } else if ((0 == strncmp((*token), "cube_left", strlen("cube_left")))) {
+    ty = TEXTURE_TYPE_CUBE_LEFT;
+  } else if ((0 == strncmp((*token), "cube_right", strlen("cube_right")))) {
+    ty = TEXTURE_TYPE_CUBE_RIGHT;
+  } else if ((0 == strncmp((*token), "cube_front", strlen("cube_front")))) {
+    ty = TEXTURE_TYPE_CUBE_FRONT;
+  } else if ((0 == strncmp((*token), "cube_back", strlen("cube_back")))) {
+    ty = TEXTURE_TYPE_CUBE_BACK;
+  } else if ((0 == strncmp((*token), "sphere", strlen("sphere")))) {
+    ty = TEXTURE_TYPE_SPHERE;
+  }
+
+  (*token) = end;
+  return ty;
+}
+
+static tag_sizes parseTagTriple(const char **token) {
+  tag_sizes ts;
+
+  (*token) += strspn((*token), " \t");
+  ts.num_ints = atoi((*token));
+  (*token) += strcspn((*token), "/ \t\r");
+  if ((*token)[0] != '/') {
+    return ts;
+  }
+
+  (*token)++;  // Skip '/'
+
+  (*token) += strspn((*token), " \t");
+  ts.num_reals = atoi((*token));
+  (*token) += strcspn((*token), "/ \t\r");
+  if ((*token)[0] != '/') {
+    return ts;
+  }
+  (*token)++;  // Skip '/'
+
+  ts.num_strings = parseInt(token);
+
+  return ts;
+}
+
+// Parse triples with index offsets: i, i/j/k, i//k, i/j
+static bool parseTriple(const char **token, int vsize, int vnsize, int vtsize,
+                        vertex_index_t *ret, const warning_context &context) {
+  if (!ret) {
+    return false;
+  }
+
+  vertex_index_t vi(-1);
+
+  if (!fixIndex(atoi((*token)), vsize, &vi.v_idx, false, context)) {
+    return false;
+  }
+
+  (*token) += strcspn((*token), "/ \t\r");
+  if ((*token)[0] != '/') {
+    (*ret) = vi;
+    return true;
+  }
+  (*token)++;
+
+  // i//k
+  if ((*token)[0] == '/') {
+    (*token)++;
+    if (!fixIndex(atoi((*token)), vnsize, &vi.vn_idx, true, context)) {
+      return false;
+    }
+    (*token) += strcspn((*token), "/ \t\r");
+    (*ret) = vi;
+    return true;
+  }
+
+  // i/j/k or i/j
+  if (!fixIndex(atoi((*token)), vtsize, &vi.vt_idx, true, context)) {
+    return false;
+  }
+
+  (*token) += strcspn((*token), "/ \t\r");
+  if ((*token)[0] != '/') {
+    (*ret) = vi;
+    return true;
+  }
+
+  // i/j/k
+  (*token)++;  // skip '/'
+  if (!fixIndex(atoi((*token)), vnsize, &vi.vn_idx, true, context)) {
+    return false;
+  }
+  (*token) += strcspn((*token), "/ \t\r");
+
+  (*ret) = vi;
+
+  return true;
+}
+
+// Parse raw triples: i, i/j/k, i//k, i/j
+static vertex_index_t parseRawTriple(const char **token) {
+  vertex_index_t vi(static_cast<int>(0));  // 0 is an invalid index in OBJ
+
+  vi.v_idx = atoi((*token));
+  (*token) += strcspn((*token), "/ \t\r");
+  if ((*token)[0] != '/') {
+    return vi;
+  }
+  (*token)++;
+
+  // i//k
+  if ((*token)[0] == '/') {
+    (*token)++;
+    vi.vn_idx = atoi((*token));
+    (*token) += strcspn((*token), "/ \t\r");
+    return vi;
+  }
+
+  // i/j/k or i/j
+  vi.vt_idx = atoi((*token));
+  (*token) += strcspn((*token), "/ \t\r");
+  if ((*token)[0] != '/') {
+    return vi;
+  }
+
+  // i/j/k
+  (*token)++;  // skip '/'
+  vi.vn_idx = atoi((*token));
+  (*token) += strcspn((*token), "/ \t\r");
+  return vi;
+}
+
+bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt,
+                               const char *linebuf) {
+  // @todo { write more robust lexer and parser. }
+  bool found_texname = false;
+  std::string texture_name;
+
+  const char *token = linebuf;  // Assume line ends with NULL
+
+  while (!IS_NEW_LINE((*token))) {
+    token += strspn(token, " \t");  // skip space
+    if ((0 == strncmp(token, "-blendu", 7)) && IS_SPACE((token[7]))) {
+      token += 8;
+      texopt->blendu = parseOnOff(&token, /* default */ true);
+    } else if ((0 == strncmp(token, "-blendv", 7)) && IS_SPACE((token[7]))) {
+      token += 8;
+      texopt->blendv = parseOnOff(&token, /* default */ true);
+    } else if ((0 == strncmp(token, "-clamp", 6)) && IS_SPACE((token[6]))) {
+      token += 7;
+      texopt->clamp = parseOnOff(&token, /* default */ true);
+    } else if ((0 == strncmp(token, "-boost", 6)) && IS_SPACE((token[6]))) {
+      token += 7;
+      texopt->sharpness = parseReal(&token, 1.0);
+    } else if ((0 == strncmp(token, "-bm", 3)) && IS_SPACE((token[3]))) {
+      token += 4;
+      texopt->bump_multiplier = parseReal(&token, 1.0);
+    } else if ((0 == strncmp(token, "-o", 2)) && IS_SPACE((token[2]))) {
+      token += 3;
+      parseReal3(&(texopt->origin_offset[0]), &(texopt->origin_offset[1]),
+                 &(texopt->origin_offset[2]), &token);
+    } else if ((0 == strncmp(token, "-s", 2)) && IS_SPACE((token[2]))) {
+      token += 3;
+      parseReal3(&(texopt->scale[0]), &(texopt->scale[1]), &(texopt->scale[2]),
+                 &token, 1.0, 1.0, 1.0);
+    } else if ((0 == strncmp(token, "-t", 2)) && IS_SPACE((token[2]))) {
+      token += 3;
+      parseReal3(&(texopt->turbulence[0]), &(texopt->turbulence[1]),
+                 &(texopt->turbulence[2]), &token);
+    } else if ((0 == strncmp(token, "-type", 5)) && IS_SPACE((token[5]))) {
+      token += 5;
+      texopt->type = parseTextureType((&token), TEXTURE_TYPE_NONE);
+    } else if ((0 == strncmp(token, "-texres", 7)) && IS_SPACE((token[7]))) {
+      token += 7;
+      // TODO(syoyo): Check if arg is int type.
+      texopt->texture_resolution = parseInt(&token);
+    } else if ((0 == strncmp(token, "-imfchan", 8)) && IS_SPACE((token[8]))) {
+      token += 9;
+      token += strspn(token, " \t");
+      const char *end = token + strcspn(token, " \t\r");
+      if ((end - token) == 1) {  // Assume one char for -imfchan
+        texopt->imfchan = (*token);
+      }
+      token = end;
+    } else if ((0 == strncmp(token, "-mm", 3)) && IS_SPACE((token[3]))) {
+      token += 4;
+      parseReal2(&(texopt->brightness), &(texopt->contrast), &token, 0.0, 1.0);
+    } else if ((0 == strncmp(token, "-colorspace", 11)) &&
+               IS_SPACE((token[11]))) {
+      token += 12;
+      texopt->colorspace = parseString(&token);
+    } else {
+// Assume texture filename
+#if 0
+      size_t len = strcspn(token, " \t\r");  // untile next space
+      texture_name = std::string(token, token + len);
+      token += len;
+
+      token += strspn(token, " \t");  // skip space
+#else
+      // Read filename until line end to parse filename containing whitespace
+      // TODO(syoyo): Support parsing texture option flag after the filename.
+      texture_name = std::string(token);
+      token += texture_name.length();
+#endif
+
+      found_texname = true;
+    }
+  }
+
+  if (found_texname) {
+    (*texname) = texture_name;
+    return true;
+  } else {
+    return false;
+  }
+}
+
+static void InitTexOpt(texture_option_t *texopt, const bool is_bump) {
+  if (is_bump) {
+    texopt->imfchan = 'l';
+  } else {
+    texopt->imfchan = 'm';
+  }
+  texopt->bump_multiplier = static_cast<real_t>(1.0);
+  texopt->clamp = false;
+  texopt->blendu = true;
+  texopt->blendv = true;
+  texopt->sharpness = static_cast<real_t>(1.0);
+  texopt->brightness = static_cast<real_t>(0.0);
+  texopt->contrast = static_cast<real_t>(1.0);
+  texopt->origin_offset[0] = static_cast<real_t>(0.0);
+  texopt->origin_offset[1] = static_cast<real_t>(0.0);
+  texopt->origin_offset[2] = static_cast<real_t>(0.0);
+  texopt->scale[0] = static_cast<real_t>(1.0);
+  texopt->scale[1] = static_cast<real_t>(1.0);
+  texopt->scale[2] = static_cast<real_t>(1.0);
+  texopt->turbulence[0] = static_cast<real_t>(0.0);
+  texopt->turbulence[1] = static_cast<real_t>(0.0);
+  texopt->turbulence[2] = static_cast<real_t>(0.0);
+  texopt->texture_resolution = -1;
+  texopt->type = TEXTURE_TYPE_NONE;
+}
+
+static void InitMaterial(material_t *material) {
+  InitTexOpt(&material->ambient_texopt, /* is_bump */ false);
+  InitTexOpt(&material->diffuse_texopt, /* is_bump */ false);
+  InitTexOpt(&material->specular_texopt, /* is_bump */ false);
+  InitTexOpt(&material->specular_highlight_texopt, /* is_bump */ false);
+  InitTexOpt(&material->bump_texopt, /* is_bump */ true);
+  InitTexOpt(&material->displacement_texopt, /* is_bump */ false);
+  InitTexOpt(&material->alpha_texopt, /* is_bump */ false);
+  InitTexOpt(&material->reflection_texopt, /* is_bump */ false);
+  InitTexOpt(&material->roughness_texopt, /* is_bump */ false);
+  InitTexOpt(&material->metallic_texopt, /* is_bump */ false);
+  InitTexOpt(&material->sheen_texopt, /* is_bump */ false);
+  InitTexOpt(&material->emissive_texopt, /* is_bump */ false);
+  InitTexOpt(&material->normal_texopt,
+             /* is_bump */ false);  // @fixme { is_bump will be true? }
+  material->name = "";
+  material->ambient_texname = "";
+  material->diffuse_texname = "";
+  material->specular_texname = "";
+  material->specular_highlight_texname = "";
+  material->bump_texname = "";
+  material->displacement_texname = "";
+  material->reflection_texname = "";
+  material->alpha_texname = "";
+  for (int i = 0; i < 3; i++) {
+    material->ambient[i] = static_cast<real_t>(0.0);
+    material->diffuse[i] = static_cast<real_t>(0.0);
+    material->specular[i] = static_cast<real_t>(0.0);
+    material->transmittance[i] = static_cast<real_t>(0.0);
+    material->emission[i] = static_cast<real_t>(0.0);
+  }
+  material->illum = 0;
+  material->dissolve = static_cast<real_t>(1.0);
+  material->shininess = static_cast<real_t>(1.0);
+  material->ior = static_cast<real_t>(1.0);
+
+  material->roughness = static_cast<real_t>(0.0);
+  material->metallic = static_cast<real_t>(0.0);
+  material->sheen = static_cast<real_t>(0.0);
+  material->clearcoat_thickness = static_cast<real_t>(0.0);
+  material->clearcoat_roughness = static_cast<real_t>(0.0);
+  material->anisotropy_rotation = static_cast<real_t>(0.0);
+  material->anisotropy = static_cast<real_t>(0.0);
+  material->roughness_texname = "";
+  material->metallic_texname = "";
+  material->sheen_texname = "";
+  material->emissive_texname = "";
+  material->normal_texname = "";
+
+  material->unknown_parameter.clear();
+}
+
+// code from https://wrf.ecse.rpi.edu//Research/Short_Notes/pnpoly.html
+template <typename T>
+static int pnpoly(int nvert, T *vertx, T *verty, T testx, T testy) {
+  int i, j, c = 0;
+  for (i = 0, j = nvert - 1; i < nvert; j = i++) {
+    if (((verty[i] > testy) != (verty[j] > testy)) &&
+        (testx <
+         (vertx[j] - vertx[i]) * (testy - verty[i]) / (verty[j] - verty[i]) +
+             vertx[i]))
+      c = !c;
+  }
+  return c;
+}
+
+struct TinyObjPoint {
+  real_t x, y, z;
+  TinyObjPoint() : x(0), y(0), z(0) {}
+  TinyObjPoint(real_t x_, real_t y_, real_t z_) :
+    x(x_), y(y_), z(z_) {}
+};
+
+inline TinyObjPoint cross(const TinyObjPoint &v1, const TinyObjPoint &v2) {
+  return TinyObjPoint(v1.y * v2.z - v1.z * v2.y,
+                      v1.z * v2.x - v1.x * v2.z,
+                      v1.x * v2.y - v1.y * v2.x);
+}
+
+inline real_t dot(const TinyObjPoint &v1, const TinyObjPoint &v2) {
+  return (v1.x * v2.x + v1.y * v2.y + v1.z * v2.z);
+}
+
+inline real_t GetLength(TinyObjPoint &e) {
+    return std::sqrt(e.x*e.x + e.y*e.y + e.z*e.z);
+}
+
+inline TinyObjPoint Normalize(TinyObjPoint e) {
+    real_t inv_length = real_t(1) / GetLength(e);
+    return TinyObjPoint(e.x * inv_length, e.y * inv_length, e.z * inv_length );
+}
+
+
+inline TinyObjPoint WorldToLocal(const TinyObjPoint& a,
+                                          const TinyObjPoint& u,
+                                          const TinyObjPoint& v,
+                                          const TinyObjPoint& w) {
+  return TinyObjPoint(dot(a,u),dot(a,v),dot(a,w));
+}
+
+
+// TODO(syoyo): refactor function.
+static bool exportGroupsToShape(shape_t *shape, const PrimGroup &prim_group,
+                                const std::vector<tag_t> &tags,
+                                const int material_id, const std::string &name,
+                                bool triangulate, const std::vector<real_t> &v,
+                                std::string *warn) {
+  if (prim_group.IsEmpty()) {
+    return false;
+  }
+
+  shape->name = name;
+
+  // polygon
+  if (!prim_group.faceGroup.empty()) {
+    // Flatten vertices and indices
+    for (size_t i = 0; i < prim_group.faceGroup.size(); i++) {
+      const face_t &face = prim_group.faceGroup[i];
+
+      size_t npolys = face.vertex_indices.size();
+
+      if (npolys < 3) {
+        // Face must have 3+ vertices.
+        if (warn) {
+          (*warn) += "Degenerated face found\n.";
+        }
+        continue;
+      }
+
+      if (triangulate && npolys != 3) {
+        if (npolys == 4) {
+          vertex_index_t i0 = face.vertex_indices[0];
+          vertex_index_t i1 = face.vertex_indices[1];
+          vertex_index_t i2 = face.vertex_indices[2];
+          vertex_index_t i3 = face.vertex_indices[3];
+
+          size_t vi0 = size_t(i0.v_idx);
+          size_t vi1 = size_t(i1.v_idx);
+          size_t vi2 = size_t(i2.v_idx);
+          size_t vi3 = size_t(i3.v_idx);
+
+          if (((3 * vi0 + 2) >= v.size()) || ((3 * vi1 + 2) >= v.size()) ||
+              ((3 * vi2 + 2) >= v.size()) || ((3 * vi3 + 2) >= v.size())) {
+            // Invalid triangle.
+            // FIXME(syoyo): Is it ok to simply skip this invalid triangle?
+            if (warn) {
+              (*warn) += "Face with invalid vertex index found.\n";
+            }
+            continue;
+          }
+
+          real_t v0x = v[vi0 * 3 + 0];
+          real_t v0y = v[vi0 * 3 + 1];
+          real_t v0z = v[vi0 * 3 + 2];
+          real_t v1x = v[vi1 * 3 + 0];
+          real_t v1y = v[vi1 * 3 + 1];
+          real_t v1z = v[vi1 * 3 + 2];
+          real_t v2x = v[vi2 * 3 + 0];
+          real_t v2y = v[vi2 * 3 + 1];
+          real_t v2z = v[vi2 * 3 + 2];
+          real_t v3x = v[vi3 * 3 + 0];
+          real_t v3y = v[vi3 * 3 + 1];
+          real_t v3z = v[vi3 * 3 + 2];
+
+          // There are two candidates to split the quad into two triangles.
+          //
+          // Choose the shortest edge.
+          // TODO: Is it better to determine the edge to split by calculating
+          // the area of each triangle?
+          //
+          // +---+
+          // |\  |
+          // | \ |
+          // |  \|
+          // +---+
+          //
+          // +---+
+          // |  /|
+          // | / |
+          // |/  |
+          // +---+
+
+          real_t e02x = v2x - v0x;
+          real_t e02y = v2y - v0y;
+          real_t e02z = v2z - v0z;
+          real_t e13x = v3x - v1x;
+          real_t e13y = v3y - v1y;
+          real_t e13z = v3z - v1z;
+
+          real_t sqr02 = e02x * e02x + e02y * e02y + e02z * e02z;
+          real_t sqr13 = e13x * e13x + e13y * e13y + e13z * e13z;
+
+          index_t idx0, idx1, idx2, idx3;
+
+          idx0.vertex_index = i0.v_idx;
+          idx0.normal_index = i0.vn_idx;
+          idx0.texcoord_index = i0.vt_idx;
+          idx1.vertex_index = i1.v_idx;
+          idx1.normal_index = i1.vn_idx;
+          idx1.texcoord_index = i1.vt_idx;
+          idx2.vertex_index = i2.v_idx;
+          idx2.normal_index = i2.vn_idx;
+          idx2.texcoord_index = i2.vt_idx;
+          idx3.vertex_index = i3.v_idx;
+          idx3.normal_index = i3.vn_idx;
+          idx3.texcoord_index = i3.vt_idx;
+
+          if (sqr02 < sqr13) {
+            // [0, 1, 2], [0, 2, 3]
+            shape->mesh.indices.push_back(idx0);
+            shape->mesh.indices.push_back(idx1);
+            shape->mesh.indices.push_back(idx2);
+
+            shape->mesh.indices.push_back(idx0);
+            shape->mesh.indices.push_back(idx2);
+            shape->mesh.indices.push_back(idx3);
+          } else {
+            // [0, 1, 3], [1, 2, 3]
+            shape->mesh.indices.push_back(idx0);
+            shape->mesh.indices.push_back(idx1);
+            shape->mesh.indices.push_back(idx3);
+
+            shape->mesh.indices.push_back(idx1);
+            shape->mesh.indices.push_back(idx2);
+            shape->mesh.indices.push_back(idx3);
+          }
+
+          // Two triangle faces
+          shape->mesh.num_face_vertices.push_back(3);
+          shape->mesh.num_face_vertices.push_back(3);
+
+          shape->mesh.material_ids.push_back(material_id);
+          shape->mesh.material_ids.push_back(material_id);
+
+          shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id);
+          shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id);
+
+        } else {
+#ifdef TINYOBJLOADER_USE_MAPBOX_EARCUT
+          vertex_index_t i0 = face.vertex_indices[0];
+          vertex_index_t i0_2 = i0;
+
+          // TMW change: Find the normal axis of the polygon using Newell's method
+          TinyObjPoint n;
+          for (size_t k = 0; k < npolys; ++k) {
+            i0 = face.vertex_indices[k % npolys];
+            size_t vi0 = size_t(i0.v_idx);
+
+            size_t j = (k + 1) % npolys;
+            i0_2 = face.vertex_indices[j];
+            size_t vi0_2 = size_t(i0_2.v_idx);
+
+            real_t v0x = v[vi0 * 3 + 0];
+            real_t v0y = v[vi0 * 3 + 1];
+            real_t v0z = v[vi0 * 3 + 2];
+
+            real_t v0x_2 = v[vi0_2 * 3 + 0];
+            real_t v0y_2 = v[vi0_2 * 3 + 1];
+            real_t v0z_2 = v[vi0_2 * 3 + 2];
+
+            const TinyObjPoint point1(v0x,v0y,v0z);
+            const TinyObjPoint point2(v0x_2,v0y_2,v0z_2);
+
+            TinyObjPoint a(point1.x - point2.x, point1.y - point2.y, point1.z - point2.z);
+            TinyObjPoint b(point1.x + point2.x, point1.y + point2.y, point1.z + point2.z);
+
+            n.x += (a.y * b.z);
+            n.y += (a.z * b.x);
+            n.z += (a.x * b.y);
+          }
+          real_t length_n = GetLength(n);
+          //Check if zero length normal
+          if(length_n <= 0) {
+            continue;
+          }
+          //Negative is to flip the normal to the correct direction
+          real_t inv_length = -real_t(1.0) / length_n;
+          n.x *= inv_length;
+          n.y *= inv_length;
+          n.z *= inv_length;
+
+          TinyObjPoint axis_w, axis_v, axis_u;
+          axis_w = n;
+          TinyObjPoint a;
+          if(std::abs(axis_w.x) > real_t(0.9999999)) {
+            a = TinyObjPoint(0,1,0);
+          } else {
+            a = TinyObjPoint(1,0,0);
+          }
+          axis_v = Normalize(cross(axis_w, a));
+          axis_u = cross(axis_w, axis_v);
+          using Point = std::array<real_t, 2>;
+
+          // first polyline define the main polygon.
+          // following polylines define holes(not used in tinyobj).
+          std::vector<std::vector<Point> > polygon;
+
+          std::vector<Point> polyline;
+
+          //TMW change: Find best normal and project v0x and v0y to those coordinates, instead of
+          //picking a plane aligned with an axis (which can flip polygons).
+
+          // Fill polygon data(facevarying vertices).
+          for (size_t k = 0; k < npolys; k++) {
+            i0 = face.vertex_indices[k];
+            size_t vi0 = size_t(i0.v_idx);
+
+            assert(((3 * vi0 + 2) < v.size()));
+
+            real_t v0x = v[vi0 * 3 + 0];
+            real_t v0y = v[vi0 * 3 + 1];
+            real_t v0z = v[vi0 * 3 + 2];
+
+            TinyObjPoint polypoint(v0x,v0y,v0z);
+            TinyObjPoint loc = WorldToLocal(polypoint, axis_u, axis_v, axis_w);
+
+            polyline.push_back({loc.x, loc.y});
+          }
+
+          polygon.push_back(polyline);
+          std::vector<uint32_t> indices = mapbox::earcut<uint32_t>(polygon);
+          // => result = 3 * faces, clockwise
+
+          assert(indices.size() % 3 == 0);
+
+          // Reconstruct vertex_index_t
+          for (size_t k = 0; k < indices.size() / 3; k++) {
+            {
+              index_t idx0, idx1, idx2;
+              idx0.vertex_index = face.vertex_indices[indices[3 * k + 0]].v_idx;
+              idx0.normal_index =
+                face.vertex_indices[indices[3 * k + 0]].vn_idx;
+              idx0.texcoord_index =
+                face.vertex_indices[indices[3 * k + 0]].vt_idx;
+              idx1.vertex_index = face.vertex_indices[indices[3 * k + 1]].v_idx;
+              idx1.normal_index =
+                face.vertex_indices[indices[3 * k + 1]].vn_idx;
+              idx1.texcoord_index =
+                face.vertex_indices[indices[3 * k + 1]].vt_idx;
+              idx2.vertex_index = face.vertex_indices[indices[3 * k + 2]].v_idx;
+              idx2.normal_index =
+                face.vertex_indices[indices[3 * k + 2]].vn_idx;
+              idx2.texcoord_index =
+                face.vertex_indices[indices[3 * k + 2]].vt_idx;
+
+              shape->mesh.indices.push_back(idx0);
+              shape->mesh.indices.push_back(idx1);
+              shape->mesh.indices.push_back(idx2);
+
+              shape->mesh.num_face_vertices.push_back(3);
+              shape->mesh.material_ids.push_back(material_id);
+              shape->mesh.smoothing_group_ids.push_back(
+                  face.smoothing_group_id);
+            }
+          }
+
+#else  // Built-in ear clipping triangulation
+          vertex_index_t i0 = face.vertex_indices[0];
+          vertex_index_t i1(-1);
+          vertex_index_t i2 = face.vertex_indices[1];
+
+          // find the two axes to work in
+          size_t axes[2] = {1, 2};
+          for (size_t k = 0; k < npolys; ++k) {
+            i0 = face.vertex_indices[(k + 0) % npolys];
+            i1 = face.vertex_indices[(k + 1) % npolys];
+            i2 = face.vertex_indices[(k + 2) % npolys];
+            size_t vi0 = size_t(i0.v_idx);
+            size_t vi1 = size_t(i1.v_idx);
+            size_t vi2 = size_t(i2.v_idx);
+
+            if (((3 * vi0 + 2) >= v.size()) || ((3 * vi1 + 2) >= v.size()) ||
+                ((3 * vi2 + 2) >= v.size())) {
+              // Invalid triangle.
+              // FIXME(syoyo): Is it ok to simply skip this invalid triangle?
+              continue;
+            }
+            real_t v0x = v[vi0 * 3 + 0];
+            real_t v0y = v[vi0 * 3 + 1];
+            real_t v0z = v[vi0 * 3 + 2];
+            real_t v1x = v[vi1 * 3 + 0];
+            real_t v1y = v[vi1 * 3 + 1];
+            real_t v1z = v[vi1 * 3 + 2];
+            real_t v2x = v[vi2 * 3 + 0];
+            real_t v2y = v[vi2 * 3 + 1];
+            real_t v2z = v[vi2 * 3 + 2];
+            real_t e0x = v1x - v0x;
+            real_t e0y = v1y - v0y;
+            real_t e0z = v1z - v0z;
+            real_t e1x = v2x - v1x;
+            real_t e1y = v2y - v1y;
+            real_t e1z = v2z - v1z;
+            real_t cx = std::fabs(e0y * e1z - e0z * e1y);
+            real_t cy = std::fabs(e0z * e1x - e0x * e1z);
+            real_t cz = std::fabs(e0x * e1y - e0y * e1x);
+            const real_t epsilon = std::numeric_limits<real_t>::epsilon();
+            // std::cout << "cx " << cx << ", cy " << cy << ", cz " << cz <<
+            // "\n";
+            if (cx > epsilon || cy > epsilon || cz > epsilon) {
+              // std::cout << "corner\n";
+              // found a corner
+              if (cx > cy && cx > cz) {
+                // std::cout << "pattern0\n";
+              } else {
+                // std::cout << "axes[0] = 0\n";
+                axes[0] = 0;
+                if (cz > cx && cz > cy) {
+                  // std::cout << "axes[1] = 1\n";
+                  axes[1] = 1;
+                }
+              }
+              break;
+            }
+          }
+
+          face_t remainingFace = face;  // copy
+          size_t guess_vert = 0;
+          vertex_index_t ind[3];
+          real_t vx[3];
+          real_t vy[3];
+
+          // How many iterations can we do without decreasing the remaining
+          // vertices.
+          size_t remainingIterations = face.vertex_indices.size();
+          size_t previousRemainingVertices =
+              remainingFace.vertex_indices.size();
+
+          while (remainingFace.vertex_indices.size() > 3 &&
+                 remainingIterations > 0) {
+            // std::cout << "remainingIterations " << remainingIterations <<
+            // "\n";
+
+            npolys = remainingFace.vertex_indices.size();
+            if (guess_vert >= npolys) {
+              guess_vert -= npolys;
+            }
+
+            if (previousRemainingVertices != npolys) {
+              // The number of remaining vertices decreased. Reset counters.
+              previousRemainingVertices = npolys;
+              remainingIterations = npolys;
+            } else {
+              // We didn't consume a vertex on previous iteration, reduce the
+              // available iterations.
+              remainingIterations--;
+            }
+
+            for (size_t k = 0; k < 3; k++) {
+              ind[k] = remainingFace.vertex_indices[(guess_vert + k) % npolys];
+              size_t vi = size_t(ind[k].v_idx);
+              if (((vi * 3 + axes[0]) >= v.size()) ||
+                  ((vi * 3 + axes[1]) >= v.size())) {
+                // ???
+                vx[k] = static_cast<real_t>(0.0);
+                vy[k] = static_cast<real_t>(0.0);
+              } else {
+                vx[k] = v[vi * 3 + axes[0]];
+                vy[k] = v[vi * 3 + axes[1]];
+              }
+            }
+
+            //
+            // area is calculated per face
+            //
+            real_t e0x = vx[1] - vx[0];
+            real_t e0y = vy[1] - vy[0];
+            real_t e1x = vx[2] - vx[1];
+            real_t e1y = vy[2] - vy[1];
+            real_t cross = e0x * e1y - e0y * e1x;
+            // std::cout << "axes = " << axes[0] << ", " << axes[1] << "\n";
+            // std::cout << "e0x, e0y, e1x, e1y " << e0x << ", " << e0y << ", "
+            // << e1x << ", " << e1y << "\n";
+
+            real_t area = (vx[0] * vy[1] - vy[0] * vx[1]) * static_cast<real_t>(0.5);
+            // std::cout << "cross " << cross << ", area " << area << "\n";
+            // if an internal angle
+            if (cross * area < static_cast<real_t>(0.0)) {
+              // std::cout << "internal \n";
+              guess_vert += 1;
+              // std::cout << "guess vert : " << guess_vert << "\n";
+              continue;
+            }
+
+            // check all other verts in case they are inside this triangle
+            bool overlap = false;
+            for (size_t otherVert = 3; otherVert < npolys; ++otherVert) {
+              size_t idx = (guess_vert + otherVert) % npolys;
+
+              if (idx >= remainingFace.vertex_indices.size()) {
+                // std::cout << "???0\n";
+                // ???
+                continue;
+              }
+
+              size_t ovi = size_t(remainingFace.vertex_indices[idx].v_idx);
+
+              if (((ovi * 3 + axes[0]) >= v.size()) ||
+                  ((ovi * 3 + axes[1]) >= v.size())) {
+                // std::cout << "???1\n";
+                // ???
+                continue;
+              }
+              real_t tx = v[ovi * 3 + axes[0]];
+              real_t ty = v[ovi * 3 + axes[1]];
+              if (pnpoly(3, vx, vy, tx, ty)) {
+                // std::cout << "overlap\n";
+                overlap = true;
+                break;
+              }
+            }
+
+            if (overlap) {
+              // std::cout << "overlap2\n";
+              guess_vert += 1;
+              continue;
+            }
+
+            // this triangle is an ear
+            {
+              index_t idx0, idx1, idx2;
+              idx0.vertex_index = ind[0].v_idx;
+              idx0.normal_index = ind[0].vn_idx;
+              idx0.texcoord_index = ind[0].vt_idx;
+              idx1.vertex_index = ind[1].v_idx;
+              idx1.normal_index = ind[1].vn_idx;
+              idx1.texcoord_index = ind[1].vt_idx;
+              idx2.vertex_index = ind[2].v_idx;
+              idx2.normal_index = ind[2].vn_idx;
+              idx2.texcoord_index = ind[2].vt_idx;
+
+              shape->mesh.indices.push_back(idx0);
+              shape->mesh.indices.push_back(idx1);
+              shape->mesh.indices.push_back(idx2);
+
+              shape->mesh.num_face_vertices.push_back(3);
+              shape->mesh.material_ids.push_back(material_id);
+              shape->mesh.smoothing_group_ids.push_back(
+                  face.smoothing_group_id);
+            }
+
+            // remove v1 from the list
+            size_t removed_vert_index = (guess_vert + 1) % npolys;
+            while (removed_vert_index + 1 < npolys) {
+              remainingFace.vertex_indices[removed_vert_index] =
+                  remainingFace.vertex_indices[removed_vert_index + 1];
+              removed_vert_index += 1;
+            }
+            remainingFace.vertex_indices.pop_back();
+          }
+
+          // std::cout << "remainingFace.vi.size = " <<
+          // remainingFace.vertex_indices.size() << "\n";
+          if (remainingFace.vertex_indices.size() == 3) {
+            i0 = remainingFace.vertex_indices[0];
+            i1 = remainingFace.vertex_indices[1];
+            i2 = remainingFace.vertex_indices[2];
+            {
+              index_t idx0, idx1, idx2;
+              idx0.vertex_index = i0.v_idx;
+              idx0.normal_index = i0.vn_idx;
+              idx0.texcoord_index = i0.vt_idx;
+              idx1.vertex_index = i1.v_idx;
+              idx1.normal_index = i1.vn_idx;
+              idx1.texcoord_index = i1.vt_idx;
+              idx2.vertex_index = i2.v_idx;
+              idx2.normal_index = i2.vn_idx;
+              idx2.texcoord_index = i2.vt_idx;
+
+              shape->mesh.indices.push_back(idx0);
+              shape->mesh.indices.push_back(idx1);
+              shape->mesh.indices.push_back(idx2);
+
+              shape->mesh.num_face_vertices.push_back(3);
+              shape->mesh.material_ids.push_back(material_id);
+              shape->mesh.smoothing_group_ids.push_back(
+                  face.smoothing_group_id);
+            }
+          }
+#endif
+        }  // npolys
+      } else {
+        for (size_t k = 0; k < npolys; k++) {
+          index_t idx;
+          idx.vertex_index = face.vertex_indices[k].v_idx;
+          idx.normal_index = face.vertex_indices[k].vn_idx;
+          idx.texcoord_index = face.vertex_indices[k].vt_idx;
+          shape->mesh.indices.push_back(idx);
+        }
+
+        shape->mesh.num_face_vertices.push_back(
+            static_cast<unsigned char>(npolys));
+        shape->mesh.material_ids.push_back(material_id);  // per face
+        shape->mesh.smoothing_group_ids.push_back(
+            face.smoothing_group_id);  // per face
+      }
+    }
+
+    shape->mesh.tags = tags;
+  }
+
+  // line
+  if (!prim_group.lineGroup.empty()) {
+    // Flatten indices
+    for (size_t i = 0; i < prim_group.lineGroup.size(); i++) {
+      for (size_t j = 0; j < prim_group.lineGroup[i].vertex_indices.size();
+           j++) {
+        const vertex_index_t &vi = prim_group.lineGroup[i].vertex_indices[j];
+
+        index_t idx;
+        idx.vertex_index = vi.v_idx;
+        idx.normal_index = vi.vn_idx;
+        idx.texcoord_index = vi.vt_idx;
+
+        shape->lines.indices.push_back(idx);
+      }
+
+      shape->lines.num_line_vertices.push_back(
+          int(prim_group.lineGroup[i].vertex_indices.size()));
+    }
+  }
+
+  // points
+  if (!prim_group.pointsGroup.empty()) {
+    // Flatten & convert indices
+    for (size_t i = 0; i < prim_group.pointsGroup.size(); i++) {
+      for (size_t j = 0; j < prim_group.pointsGroup[i].vertex_indices.size();
+           j++) {
+        const vertex_index_t &vi = prim_group.pointsGroup[i].vertex_indices[j];
+
+        index_t idx;
+        idx.vertex_index = vi.v_idx;
+        idx.normal_index = vi.vn_idx;
+        idx.texcoord_index = vi.vt_idx;
+
+        shape->points.indices.push_back(idx);
+      }
+    }
+  }
+
+  return true;
+}
+
+// Split a string with specified delimiter character and escape character.
+// https://rosettacode.org/wiki/Tokenize_a_string_with_escaping#C.2B.2B
+static void SplitString(const std::string &s, char delim, char escape,
+                        std::vector<std::string> &elems) {
+  std::string token;
+
+  bool escaping = false;
+  for (size_t i = 0; i < s.size(); ++i) {
+    char ch = s[i];
+    if (escaping) {
+      escaping = false;
+    } else if (ch == escape) {
+      escaping = true;
+      continue;
+    } else if (ch == delim) {
+      if (!token.empty()) {
+        elems.push_back(token);
+      }
+      token.clear();
+      continue;
+    }
+    token += ch;
+  }
+
+  elems.push_back(token);
+}
+
+static std::string JoinPath(const std::string &dir,
+                            const std::string &filename) {
+  if (dir.empty()) {
+    return filename;
+  } else {
+    // check '/'
+    char lastChar = *dir.rbegin();
+    if (lastChar != '/') {
+      return dir + std::string("/") + filename;
+    } else {
+      return dir + filename;
+    }
+  }
+}
+
+void LoadMtl(std::map<std::string, int> *material_map,
+             std::vector<material_t> *materials, std::istream *inStream,
+             std::string *warning, std::string *err) {
+  (void)err;
+
+  // Create a default material anyway.
+  material_t material;
+  InitMaterial(&material);
+
+  // Issue 43. `d` wins against `Tr` since `Tr` is not in the MTL specification.
+  bool has_d = false;
+  bool has_tr = false;
+
+  // has_kd is used to set a default diffuse value when map_Kd is present
+  // and Kd is not.
+  bool has_kd = false;
+
+  std::stringstream warn_ss;
+
+  size_t line_no = 0;
+  std::string linebuf;
+  while (inStream->peek() != -1) {
+    safeGetline(*inStream, linebuf);
+    line_no++;
+
+    // Trim trailing whitespace.
+    if (linebuf.size() > 0) {
+      linebuf = linebuf.substr(0, linebuf.find_last_not_of(" \t") + 1);
+    }
+
+    // Trim newline '\r\n' or '\n'
+    if (linebuf.size() > 0) {
+      if (linebuf[linebuf.size() - 1] == '\n')
+        linebuf.erase(linebuf.size() - 1);
+    }
+    if (linebuf.size() > 0) {
+      if (linebuf[linebuf.size() - 1] == '\r')
+        linebuf.erase(linebuf.size() - 1);
+    }
+
+    // Skip if empty line.
+    if (linebuf.empty()) {
+      continue;
+    }
+
+    // Skip leading space.
+    const char *token = linebuf.c_str();
+    token += strspn(token, " \t");
+
+    assert(token);
+    if (token[0] == '\0') continue;  // empty line
+
+    if (token[0] == '#') continue;  // comment line
+
+    // new mtl
+    if ((0 == strncmp(token, "newmtl", 6)) && IS_SPACE((token[6]))) {
+      // flush previous material.
+      if (!material.name.empty()) {
+        material_map->insert(std::pair<std::string, int>(
+            material.name, static_cast<int>(materials->size())));
+        materials->push_back(material);
+      }
+
+      // initial temporary material
+      InitMaterial(&material);
+
+      has_d = false;
+      has_tr = false;
+
+      // set new mtl name
+      token += 7;
+      {
+        std::string namebuf = parseString(&token);
+        // TODO: empty name check?
+        if (namebuf.empty()) {
+          if (warning) {
+            (*warning) += "empty material name in `newmtl`\n";
+          }
+        }
+        material.name = namebuf;
+      }
+      continue;
+    }
+
+    // ambient
+    if (token[0] == 'K' && token[1] == 'a' && IS_SPACE((token[2]))) {
+      token += 2;
+      real_t r, g, b;
+      parseReal3(&r, &g, &b, &token);
+      material.ambient[0] = r;
+      material.ambient[1] = g;
+      material.ambient[2] = b;
+      continue;
+    }
+
+    // diffuse
+    if (token[0] == 'K' && token[1] == 'd' && IS_SPACE((token[2]))) {
+      token += 2;
+      real_t r, g, b;
+      parseReal3(&r, &g, &b, &token);
+      material.diffuse[0] = r;
+      material.diffuse[1] = g;
+      material.diffuse[2] = b;
+      has_kd = true;
+      continue;
+    }
+
+    // specular
+    if (token[0] == 'K' && token[1] == 's' && IS_SPACE((token[2]))) {
+      token += 2;
+      real_t r, g, b;
+      parseReal3(&r, &g, &b, &token);
+      material.specular[0] = r;
+      material.specular[1] = g;
+      material.specular[2] = b;
+      continue;
+    }
+
+    // transmittance
+    if ((token[0] == 'K' && token[1] == 't' && IS_SPACE((token[2]))) ||
+        (token[0] == 'T' && token[1] == 'f' && IS_SPACE((token[2])))) {
+      token += 2;
+      real_t r, g, b;
+      parseReal3(&r, &g, &b, &token);
+      material.transmittance[0] = r;
+      material.transmittance[1] = g;
+      material.transmittance[2] = b;
+      continue;
+    }
+
+    // ior(index of refraction)
+    if (token[0] == 'N' && token[1] == 'i' && IS_SPACE((token[2]))) {
+      token += 2;
+      material.ior = parseReal(&token);
+      continue;
+    }
+
+    // emission
+    if (token[0] == 'K' && token[1] == 'e' && IS_SPACE(token[2])) {
+      token += 2;
+      real_t r, g, b;
+      parseReal3(&r, &g, &b, &token);
+      material.emission[0] = r;
+      material.emission[1] = g;
+      material.emission[2] = b;
+      continue;
+    }
+
+    // shininess
+    if (token[0] == 'N' && token[1] == 's' && IS_SPACE(token[2])) {
+      token += 2;
+      material.shininess = parseReal(&token);
+      continue;
+    }
+
+    // illum model
+    if (0 == strncmp(token, "illum", 5) && IS_SPACE(token[5])) {
+      token += 6;
+      material.illum = parseInt(&token);
+      continue;
+    }
+
+    // dissolve
+    if ((token[0] == 'd' && IS_SPACE(token[1]))) {
+      token += 1;
+      material.dissolve = parseReal(&token);
+
+      if (has_tr) {
+        warn_ss << "Both `d` and `Tr` parameters defined for \""
+                << material.name
+                << "\". Use the value of `d` for dissolve (line " << line_no
+                << " in .mtl.)\n";
+      }
+      has_d = true;
+      continue;
+    }
+    if (token[0] == 'T' && token[1] == 'r' && IS_SPACE(token[2])) {
+      token += 2;
+      if (has_d) {
+        // `d` wins. Ignore `Tr` value.
+        warn_ss << "Both `d` and `Tr` parameters defined for \""
+                << material.name
+                << "\". Use the value of `d` for dissolve (line " << line_no
+                << " in .mtl.)\n";
+      } else {
+        // We invert value of Tr(assume Tr is in range [0, 1])
+        // NOTE: Interpretation of Tr is application(exporter) dependent. For
+        // some application(e.g. 3ds max obj exporter), Tr = d(Issue 43)
+        material.dissolve = static_cast<real_t>(1.0) - parseReal(&token);
+      }
+      has_tr = true;
+      continue;
+    }
+
+    // PBR: roughness
+    if (token[0] == 'P' && token[1] == 'r' && IS_SPACE(token[2])) {
+      token += 2;
+      material.roughness = parseReal(&token);
+      continue;
+    }
+
+    // PBR: metallic
+    if (token[0] == 'P' && token[1] == 'm' && IS_SPACE(token[2])) {
+      token += 2;
+      material.metallic = parseReal(&token);
+      continue;
+    }
+
+    // PBR: sheen
+    if (token[0] == 'P' && token[1] == 's' && IS_SPACE(token[2])) {
+      token += 2;
+      material.sheen = parseReal(&token);
+      continue;
+    }
+
+    // PBR: clearcoat thickness
+    if (token[0] == 'P' && token[1] == 'c' && IS_SPACE(token[2])) {
+      token += 2;
+      material.clearcoat_thickness = parseReal(&token);
+      continue;
+    }
+
+    // PBR: clearcoat roughness
+    if ((0 == strncmp(token, "Pcr", 3)) && IS_SPACE(token[3])) {
+      token += 4;
+      material.clearcoat_roughness = parseReal(&token);
+      continue;
+    }
+
+    // PBR: anisotropy
+    if ((0 == strncmp(token, "aniso", 5)) && IS_SPACE(token[5])) {
+      token += 6;
+      material.anisotropy = parseReal(&token);
+      continue;
+    }
+
+    // PBR: anisotropy rotation
+    if ((0 == strncmp(token, "anisor", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      material.anisotropy_rotation = parseReal(&token);
+      continue;
+    }
+
+    // ambient or ambient occlusion texture
+    if ((0 == strncmp(token, "map_Ka", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.ambient_texname),
+                                &(material.ambient_texopt), token);
+      continue;
+    }
+
+    // diffuse texture
+    if ((0 == strncmp(token, "map_Kd", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.diffuse_texname),
+                                &(material.diffuse_texopt), token);
+
+      // Set a decent diffuse default value if a diffuse texture is specified
+      // without a matching Kd value.
+      if (!has_kd) {
+        material.diffuse[0] = static_cast<real_t>(0.6);
+        material.diffuse[1] = static_cast<real_t>(0.6);
+        material.diffuse[2] = static_cast<real_t>(0.6);
+      }
+
+      continue;
+    }
+
+    // specular texture
+    if ((0 == strncmp(token, "map_Ks", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.specular_texname),
+                                &(material.specular_texopt), token);
+      continue;
+    }
+
+    // specular highlight texture
+    if ((0 == strncmp(token, "map_Ns", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.specular_highlight_texname),
+                                &(material.specular_highlight_texopt), token);
+      continue;
+    }
+
+    // bump texture
+    if (((0 == strncmp(token, "map_bump", 8)) ||
+         (0 == strncmp(token, "map_Bump", 8))) &&
+        IS_SPACE(token[8])) {
+      token += 9;
+      ParseTextureNameAndOption(&(material.bump_texname),
+                                &(material.bump_texopt), token);
+      continue;
+    }
+
+    // bump texture
+    if ((0 == strncmp(token, "bump", 4)) && IS_SPACE(token[4])) {
+      token += 5;
+      ParseTextureNameAndOption(&(material.bump_texname),
+                                &(material.bump_texopt), token);
+      continue;
+    }
+
+    // alpha texture
+    if ((0 == strncmp(token, "map_d", 5)) && IS_SPACE(token[5])) {
+      token += 6;
+      material.alpha_texname = token;
+      ParseTextureNameAndOption(&(material.alpha_texname),
+                                &(material.alpha_texopt), token);
+      continue;
+    }
+
+    // displacement texture
+    if (((0 == strncmp(token, "map_disp", 8)) ||
+         (0 == strncmp(token, "map_Disp", 8))) &&
+        IS_SPACE(token[8])) {
+      token += 9;
+      ParseTextureNameAndOption(&(material.displacement_texname),
+                                &(material.displacement_texopt), token);
+      continue;
+    }
+
+    // displacement texture
+    if ((0 == strncmp(token, "disp", 4)) && IS_SPACE(token[4])) {
+      token += 5;
+      ParseTextureNameAndOption(&(material.displacement_texname),
+                                &(material.displacement_texopt), token);
+      continue;
+    }
+
+    // reflection map
+    if ((0 == strncmp(token, "refl", 4)) && IS_SPACE(token[4])) {
+      token += 5;
+      ParseTextureNameAndOption(&(material.reflection_texname),
+                                &(material.reflection_texopt), token);
+      continue;
+    }
+
+    // PBR: roughness texture
+    if ((0 == strncmp(token, "map_Pr", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.roughness_texname),
+                                &(material.roughness_texopt), token);
+      continue;
+    }
+
+    // PBR: metallic texture
+    if ((0 == strncmp(token, "map_Pm", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.metallic_texname),
+                                &(material.metallic_texopt), token);
+      continue;
+    }
+
+    // PBR: sheen texture
+    if ((0 == strncmp(token, "map_Ps", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.sheen_texname),
+                                &(material.sheen_texopt), token);
+      continue;
+    }
+
+    // PBR: emissive texture
+    if ((0 == strncmp(token, "map_Ke", 6)) && IS_SPACE(token[6])) {
+      token += 7;
+      ParseTextureNameAndOption(&(material.emissive_texname),
+                                &(material.emissive_texopt), token);
+      continue;
+    }
+
+    // PBR: normal map texture
+    if ((0 == strncmp(token, "norm", 4)) && IS_SPACE(token[4])) {
+      token += 5;
+      ParseTextureNameAndOption(&(material.normal_texname),
+                                &(material.normal_texopt), token);
+      continue;
+    }
+
+    // unknown parameter
+    const char *_space = strchr(token, ' ');
+    if (!_space) {
+      _space = strchr(token, '\t');
+    }
+    if (_space) {
+      std::ptrdiff_t len = _space - token;
+      std::string key(token, static_cast<size_t>(len));
+      std::string value = _space + 1;
+      material.unknown_parameter.insert(
+          std::pair<std::string, std::string>(key, value));
+    }
+  }
+  // flush last material.
+  material_map->insert(std::pair<std::string, int>(
+      material.name, static_cast<int>(materials->size())));
+  materials->push_back(material);
+
+  if (warning) {
+    (*warning) = warn_ss.str();
+  }
+}
+
+bool MaterialFileReader::operator()(const std::string &matId,
+                                    std::vector<material_t> *materials,
+                                    std::map<std::string, int> *matMap,
+                                    std::string *warn, std::string *err) {
+  if (!m_mtlBaseDir.empty()) {
+#ifdef _WIN32
+    char sep = ';';
+#else
+    char sep = ':';
+#endif
+
+    // https://stackoverflow.com/questions/5167625/splitting-a-c-stdstring-using-tokens-e-g
+    std::vector<std::string> paths;
+    std::istringstream f(m_mtlBaseDir);
+
+    std::string s;
+    while (getline(f, s, sep)) {
+        std::cout << "s: " << s << std::endl;
+        //std::cout << "line: " << getline(f, s, sep) << std::endl;
+
+      paths.push_back(s);
+    }
+
+    for (size_t i = 0; i < paths.size(); i++) {
+      std::string filepath = JoinPath(paths[i], matId);
+
+      std::ifstream matIStream(paths[i].c_str());
+
+      std::cout << "mat file: " << filepath.c_str() << std::endl;
+      if (matIStream) {
+          std::cout << "Mat IS stream!" << std::endl;
+        LoadMtl(matMap, materials, &matIStream, warn, err);
+
+        return true;
+      }
+
+      std::cout << "Mat NOT stream!" << std::endl;
+
+    }
+
+    std::stringstream ss;
+    ss << "Material file [ " << matId
+       << " ] not found in a path : " << m_mtlBaseDir << "\n";
+    if (warn) {
+      (*warn) += ss.str();
+    }
+    return false;
+
+  } else {
+    std::string filepath = matId;
+    std::ifstream matIStream(filepath.c_str());
+    if (matIStream) {
+      LoadMtl(matMap, materials, &matIStream, warn, err);
+
+      return true;
+    }
+
+    std::stringstream ss;
+    ss << "Material file [ " << filepath
+       << " ] not found in a path : " << m_mtlBaseDir << "\n";
+    if (warn) {
+      (*warn) += ss.str();
+    }
+
+    return false;
+  }
+}
+
+bool MaterialStreamReader::operator()(const std::string &matId,
+                                      std::vector<material_t> *materials,
+                                      std::map<std::string, int> *matMap,
+                                      std::string *warn, std::string *err) {
+  (void)err;
+  (void)matId;
+  if (!m_inStream) {
+    std::stringstream ss;
+    ss << "Material stream in error state. \n";
+    if (warn) {
+      (*warn) += ss.str();
+    }
+    return false;
+  }
+
+  LoadMtl(matMap, materials, &m_inStream, warn, err);
+
+  return true;
+}
+
+bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,
+             std::vector<material_t> *materials, std::string *warn,
+             std::string *err, const char *filename, const char *mtl_basedir,
+             bool triangulate, bool default_vcols_fallback) {
+  attrib->vertices.clear();
+  attrib->normals.clear();
+  attrib->texcoords.clear();
+  attrib->colors.clear();
+  shapes->clear();
+
+  std::stringstream errss;
+
+  std::ifstream ifs(filename);
+  if (!ifs) {
+    errss << "Cannot open file [" << filename << "]\n";
+    if (err) {
+      (*err) = errss.str();
+    }
+    return false;
+  }
+
+  std::string baseDir = mtl_basedir ? mtl_basedir : "";
+  if (!baseDir.empty()) {
+//#ifndef _WIN32
+//    const char dirsep = '/';
+//#else
+//    const char dirsep = '\\';
+//#endif
+//    if (baseDir[baseDir.length() - 1] != dirsep) baseDir += dirsep;
+  }
+
+  std::cout << "base dir: " << baseDir << std::endl;
+  MaterialFileReader matFileReader(baseDir);
+
+  return LoadObj(attrib, shapes, materials, warn, err, &ifs, &matFileReader,
+                 triangulate, default_vcols_fallback);
+}
+
+bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,
+             std::vector<material_t> *materials, std::string *warn,
+             std::string *err, std::istream *inStream,
+             MaterialReader *readMatFn /*= NULL*/, bool triangulate,
+             bool default_vcols_fallback) {
+  std::stringstream errss;
+
+  std::vector<real_t> v;
+  std::vector<real_t> vn;
+  std::vector<real_t> vt;
+  std::vector<real_t> vc;
+  std::vector<skin_weight_t> vw;
+  std::vector<tag_t> tags;
+  PrimGroup prim_group;
+  std::string name;
+
+  // material
+  std::set<std::string> material_filenames;
+  std::map<std::string, int> material_map;
+  int material = -1;
+
+  // smoothing group id
+  unsigned int current_smoothing_id =
+      0;  // Initial value. 0 means no smoothing.
+
+  int greatest_v_idx = -1;
+  int greatest_vn_idx = -1;
+  int greatest_vt_idx = -1;
+
+  shape_t shape;
+
+  bool found_all_colors = true;
+
+  size_t line_num = 0;
+  std::string linebuf;
+  while (inStream->peek() != -1) {
+    safeGetline(*inStream, linebuf);
+
+    line_num++;
+
+    // Trim newline '\r\n' or '\n'
+    if (linebuf.size() > 0) {
+      if (linebuf[linebuf.size() - 1] == '\n')
+        linebuf.erase(linebuf.size() - 1);
+    }
+    if (linebuf.size() > 0) {
+      if (linebuf[linebuf.size() - 1] == '\r')
+        linebuf.erase(linebuf.size() - 1);
+    }
+
+    // Skip if empty line.
+    if (linebuf.empty()) {
+      continue;
+    }
+
+    // Skip leading space.
+    const char *token = linebuf.c_str();
+    token += strspn(token, " \t");
+
+    assert(token);
+    if (token[0] == '\0') continue;  // empty line
+
+    if (token[0] == '#') continue;  // comment line
+
+    // vertex
+    if (token[0] == 'v' && IS_SPACE((token[1]))) {
+      token += 2;
+      real_t x, y, z;
+      real_t r, g, b;
+
+      found_all_colors &= parseVertexWithColor(&x, &y, &z, &r, &g, &b, &token);
+
+      v.push_back(x);
+      v.push_back(y);
+      v.push_back(z);
+
+      if (found_all_colors || default_vcols_fallback) {
+        vc.push_back(r);
+        vc.push_back(g);
+        vc.push_back(b);
+      }
+
+      continue;
+    }
+
+    // normal
+    if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) {
+      token += 3;
+      real_t x, y, z;
+      parseReal3(&x, &y, &z, &token);
+      vn.push_back(x);
+      vn.push_back(y);
+      vn.push_back(z);
+      continue;
+    }
+
+    // texcoord
+    if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) {
+      token += 3;
+      real_t x, y;
+      parseReal2(&x, &y, &token);
+      vt.push_back(x);
+      vt.push_back(y);
+      continue;
+    }
+
+    // skin weight. tinyobj extension
+    if (token[0] == 'v' && token[1] == 'w' && IS_SPACE((token[2]))) {
+      token += 3;
+
+      // vw <vid> <joint_0> <weight_0> <joint_1> <weight_1> ...
+      // example:
+      // vw 0 0 0.25 1 0.25 2 0.5
+
+      // TODO(syoyo): Add syntax check
+      int vid = 0;
+      vid = parseInt(&token);
+
+      skin_weight_t sw;
+
+      sw.vertex_id = vid;
+
+      while (!IS_NEW_LINE(token[0])) {
+        real_t j, w;
+        // joint_id should not be negative, weight may be negative
+        // TODO(syoyo): # of elements check
+        parseReal2(&j, &w, &token, -1.0);
+
+        if (j < static_cast<real_t>(0)) {
+          if (err) {
+            std::stringstream ss;
+            ss << "Failed parse `vw' line. joint_id is negative. "
+                  "line "
+               << line_num << ".)\n";
+            (*err) += ss.str();
+          }
+          return false;
+        }
+
+        joint_and_weight_t jw;
+
+        jw.joint_id = int(j);
+        jw.weight = w;
+
+        sw.weightValues.push_back(jw);
+
+        size_t n = strspn(token, " \t\r");
+        token += n;
+      }
+
+      vw.push_back(sw);
+    }
+
+    warning_context context;
+    context.warn = warn;
+    context.line_number = line_num;
+
+    // line
+    if (token[0] == 'l' && IS_SPACE((token[1]))) {
+      token += 2;
+
+      __line_t line;
+
+      while (!IS_NEW_LINE(token[0])) {
+        vertex_index_t vi;
+        if (!parseTriple(&token, static_cast<int>(v.size() / 3),
+                         static_cast<int>(vn.size() / 3),
+                         static_cast<int>(vt.size() / 2), &vi, context)) {
+          if (err) {
+            (*err) += "Failed to parse `l' line (e.g. a zero value for vertex index. Line " +
+                toString(line_num) + ").\n";
+          }
+          return false;
+        }
+
+        line.vertex_indices.push_back(vi);
+
+        size_t n = strspn(token, " \t\r");
+        token += n;
+      }
+
+      prim_group.lineGroup.push_back(line);
+
+      continue;
+    }
+
+    // points
+    if (token[0] == 'p' && IS_SPACE((token[1]))) {
+      token += 2;
+
+      __points_t pts;
+
+      while (!IS_NEW_LINE(token[0])) {
+        vertex_index_t vi;
+        if (!parseTriple(&token, static_cast<int>(v.size() / 3),
+                         static_cast<int>(vn.size() / 3),
+                         static_cast<int>(vt.size() / 2), &vi, context)) {
+          if (err) {
+            (*err) += "Failed to parse `p' line (e.g. a zero value for vertex index. Line " +
+                toString(line_num) + ").\n";
+          }
+          return false;
+        }
+
+        pts.vertex_indices.push_back(vi);
+
+        size_t n = strspn(token, " \t\r");
+        token += n;
+      }
+
+      prim_group.pointsGroup.push_back(pts);
+
+      continue;
+    }
+
+    // face
+    if (token[0] == 'f' && IS_SPACE((token[1]))) {
+      token += 2;
+      token += strspn(token, " \t");
+
+      face_t face;
+
+      face.smoothing_group_id = current_smoothing_id;
+      face.vertex_indices.reserve(3);
+
+      while (!IS_NEW_LINE(token[0])) {
+        vertex_index_t vi;
+        if (!parseTriple(&token, static_cast<int>(v.size() / 3),
+                         static_cast<int>(vn.size() / 3),
+                         static_cast<int>(vt.size() / 2), &vi, context)) {
+          if (err) {
+            (*err) += "Failed to parse `f' line (e.g. a zero value for vertex index or invalid relative vertex index). Line " +
+                toString(line_num) + ").\n";
+          }
+          return false;
+        }
+
+        greatest_v_idx = greatest_v_idx > vi.v_idx ? greatest_v_idx : vi.v_idx;
+        greatest_vn_idx =
+            greatest_vn_idx > vi.vn_idx ? greatest_vn_idx : vi.vn_idx;
+        greatest_vt_idx =
+            greatest_vt_idx > vi.vt_idx ? greatest_vt_idx : vi.vt_idx;
+
+        face.vertex_indices.push_back(vi);
+        size_t n = strspn(token, " \t\r");
+        token += n;
+      }
+
+      // replace with emplace_back + std::move on C++11
+      prim_group.faceGroup.push_back(face);
+
+      continue;
+    }
+
+    // use mtl
+    if ((0 == strncmp(token, "usemtl", 6))) {
+      token += 6;
+      std::string namebuf = parseString(&token);
+
+      int newMaterialId = -1;
+      std::map<std::string, int>::const_iterator it =
+          material_map.find(namebuf);
+      if (it != material_map.end()) {
+        newMaterialId = it->second;
+      } else {
+        // { error!! material not found }
+        if (warn) {
+          (*warn) += "material [ '" + namebuf + "' ] not found in .mtl\n";
+        }
+      }
+
+      if (newMaterialId != material) {
+        // Create per-face material. Thus we don't add `shape` to `shapes` at
+        // this time.
+        // just clear `faceGroup` after `exportGroupsToShape()` call.
+        exportGroupsToShape(&shape, prim_group, tags, material, name,
+                            triangulate, v, warn);
+        prim_group.faceGroup.clear();
+        material = newMaterialId;
+      }
+
+      continue;
+    }
+
+    // load mtl
+    if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) {
+      if (readMatFn) {
+        token += 7;
+
+        std::vector<std::string> filenames;
+        SplitString(std::string(token), ' ', '\\', filenames);
+
+        if (filenames.empty()) {
+          if (warn) {
+            std::stringstream ss;
+            ss << "Looks like empty filename for mtllib. Use default "
+                  "material (line "
+               << line_num << ".)\n";
+
+            (*warn) += ss.str();
+          }
+        } else {
+          bool found = false;
+          for (size_t s = 0; s < filenames.size(); s++) {
+            if (material_filenames.count(filenames[s]) > 0) {
+              found = true;
+              continue;
+            }
+
+            std::string warn_mtl;
+            std::string err_mtl;
+
+            std::cout << "CHECKING IF OK" << std::endl;
+
+            bool ok = (*readMatFn)(filenames[s].c_str(), materials,
+                                   &material_map, &warn_mtl, &err_mtl);
+            if (warn && (!warn_mtl.empty())) {
+              (*warn) += warn_mtl;
+            }
+
+            if (err && (!err_mtl.empty())) {
+              (*err) += err_mtl;
+            }
+
+            std::cout << "in mtl loader" << std::endl;
+            if (ok) {
+              std::cout << "in mtl loader --- OK" << std::endl;
+
+              found = true;
+              material_filenames.insert(filenames[s]);
+              std::cout << "filename:" << filenames[s] << std::endl;
+              break;
+            }
+          }
+
+          if (!found) {
+            if (warn) {
+              (*warn) +=
+                  "Failed to load material file(s). Use default "
+                  "material.\n";
+            }
+          }
+        }
+      }
+
+      continue;
+    }
+
+    // group name
+    if (token[0] == 'g' && IS_SPACE((token[1]))) {
+      // flush previous face group.
+      bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name,
+                                     triangulate, v, warn);
+      (void)ret;  // return value not used.
+
+      if (shape.mesh.indices.size() > 0) {
+        shapes->push_back(shape);
+      }
+
+      shape = shape_t();
+
+      // material = -1;
+      prim_group.clear();
+
+      std::vector<std::string> names;
+
+      while (!IS_NEW_LINE(token[0])) {
+        std::string str = parseString(&token);
+        names.push_back(str);
+        token += strspn(token, " \t\r");  // skip tag
+      }
+
+      // names[0] must be 'g'
+
+      if (names.size() < 2) {
+        // 'g' with empty names
+        if (warn) {
+          std::stringstream ss;
+          ss << "Empty group name. line: " << line_num << "\n";
+          (*warn) += ss.str();
+          name = "";
+        }
+      } else {
+        std::stringstream ss;
+        ss << names[1];
+
+        // tinyobjloader does not support multiple groups for a primitive.
+        // Currently we concatinate multiple group names with a space to get
+        // single group name.
+
+        for (size_t i = 2; i < names.size(); i++) {
+          ss << " " << names[i];
+        }
+
+        name = ss.str();
+      }
+
+      continue;
+    }
+
+    // object name
+    if (token[0] == 'o' && IS_SPACE((token[1]))) {
+      // flush previous face group.
+      bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name,
+                                     triangulate, v, warn);
+      (void)ret;  // return value not used.
+
+      if (shape.mesh.indices.size() > 0 || shape.lines.indices.size() > 0 ||
+          shape.points.indices.size() > 0) {
+        shapes->push_back(shape);
+      }
+
+      // material = -1;
+      prim_group.clear();
+      shape = shape_t();
+
+      // @todo { multiple object name? }
+      token += 2;
+      std::stringstream ss;
+      ss << token;
+      name = ss.str();
+
+      continue;
+    }
+
+    if (token[0] == 't' && IS_SPACE(token[1])) {
+      const int max_tag_nums = 8192;  // FIXME(syoyo): Parameterize.
+      tag_t tag;
+
+      token += 2;
+
+      tag.name = parseString(&token);
+
+      tag_sizes ts = parseTagTriple(&token);
+
+      if (ts.num_ints < 0) {
+        ts.num_ints = 0;
+      }
+      if (ts.num_ints > max_tag_nums) {
+        ts.num_ints = max_tag_nums;
+      }
+
+      if (ts.num_reals < 0) {
+        ts.num_reals = 0;
+      }
+      if (ts.num_reals > max_tag_nums) {
+        ts.num_reals = max_tag_nums;
+      }
+
+      if (ts.num_strings < 0) {
+        ts.num_strings = 0;
+      }
+      if (ts.num_strings > max_tag_nums) {
+        ts.num_strings = max_tag_nums;
+      }
+
+      tag.intValues.resize(static_cast<size_t>(ts.num_ints));
+
+      for (size_t i = 0; i < static_cast<size_t>(ts.num_ints); ++i) {
+        tag.intValues[i] = parseInt(&token);
+      }
+
+      tag.floatValues.resize(static_cast<size_t>(ts.num_reals));
+      for (size_t i = 0; i < static_cast<size_t>(ts.num_reals); ++i) {
+        tag.floatValues[i] = parseReal(&token);
+      }
+
+      tag.stringValues.resize(static_cast<size_t>(ts.num_strings));
+      for (size_t i = 0; i < static_cast<size_t>(ts.num_strings); ++i) {
+        tag.stringValues[i] = parseString(&token);
+      }
+
+      tags.push_back(tag);
+
+      continue;
+    }
+
+    if (token[0] == 's' && IS_SPACE(token[1])) {
+      // smoothing group id
+      token += 2;
+
+      // skip space.
+      token += strspn(token, " \t");  // skip space
+
+      if (token[0] == '\0') {
+        continue;
+      }
+
+      if (token[0] == '\r' || token[1] == '\n') {
+        continue;
+      }
+
+      if (strlen(token) >= 3 && token[0] == 'o' && token[1] == 'f' &&
+          token[2] == 'f') {
+        current_smoothing_id = 0;
+      } else {
+        // assume number
+        int smGroupId = parseInt(&token);
+        if (smGroupId < 0) {
+          // parse error. force set to 0.
+          // FIXME(syoyo): Report warning.
+          current_smoothing_id = 0;
+        } else {
+          current_smoothing_id = static_cast<unsigned int>(smGroupId);
+        }
+      }
+
+      continue;
+    }  // smoothing group id
+
+    // Ignore unknown command.
+  }
+
+  // not all vertices have colors, no default colors desired? -> clear colors
+  if (!found_all_colors && !default_vcols_fallback) {
+    vc.clear();
+  }
+
+  if (greatest_v_idx >= static_cast<int>(v.size() / 3)) {
+    if (warn) {
+      std::stringstream ss;
+      ss << "Vertex indices out of bounds (line " << line_num << ".)\n\n";
+      (*warn) += ss.str();
+    }
+  }
+  if (greatest_vn_idx >= static_cast<int>(vn.size() / 3)) {
+    if (warn) {
+      std::stringstream ss;
+      ss << "Vertex normal indices out of bounds (line " << line_num << ".)\n\n";
+      (*warn) += ss.str();
+    }
+  }
+  if (greatest_vt_idx >= static_cast<int>(vt.size() / 2)) {
+    if (warn) {
+      std::stringstream ss;
+      ss << "Vertex texcoord indices out of bounds (line " << line_num << ".)\n\n";
+      (*warn) += ss.str();
+    }
+  }
+
+  bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name,
+                                 triangulate, v, warn);
+  // exportGroupsToShape return false when `usemtl` is called in the last
+  // line.
+  // we also add `shape` to `shapes` when `shape.mesh` has already some
+  // faces(indices)
+  if (ret || shape.mesh.indices
+                 .size()) {  // FIXME(syoyo): Support other prims(e.g. lines)
+    shapes->push_back(shape);
+  }
+  prim_group.clear();  // for safety
+
+  if (err) {
+    (*err) += errss.str();
+  }
+
+  attrib->vertices.swap(v);
+  attrib->vertex_weights.swap(v);
+  attrib->normals.swap(vn);
+  attrib->texcoords.swap(vt);
+  attrib->texcoord_ws.swap(vt);
+  attrib->colors.swap(vc);
+  attrib->skin_weights.swap(vw);
+
+  return true;
+}
+
+bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback,
+                         void *user_data /*= NULL*/,
+                         MaterialReader *readMatFn /*= NULL*/,
+                         std::string *warn, /* = NULL*/
+                         std::string *err /*= NULL*/) {
+  std::stringstream errss;
+
+  // material
+  std::set<std::string> material_filenames;
+  std::map<std::string, int> material_map;
+  int material_id = -1;  // -1 = invalid
+
+  std::vector<index_t> indices;
+  std::vector<material_t> materials;
+  std::vector<std::string> names;
+  names.reserve(2);
+  std::vector<const char *> names_out;
+
+  std::string linebuf;
+  while (inStream.peek() != -1) {
+    safeGetline(inStream, linebuf);
+
+    // Trim newline '\r\n' or '\n'
+    if (linebuf.size() > 0) {
+      if (linebuf[linebuf.size() - 1] == '\n')
+        linebuf.erase(linebuf.size() - 1);
+    }
+    if (linebuf.size() > 0) {
+      if (linebuf[linebuf.size() - 1] == '\r')
+        linebuf.erase(linebuf.size() - 1);
+    }
+
+    // Skip if empty line.
+    if (linebuf.empty()) {
+      continue;
+    }
+
+    // Skip leading space.
+    const char *token = linebuf.c_str();
+    token += strspn(token, " \t");
+
+    assert(token);
+    if (token[0] == '\0') continue;  // empty line
+
+    if (token[0] == '#') continue;  // comment line
+
+    // vertex
+    if (token[0] == 'v' && IS_SPACE((token[1]))) {
+      token += 2;
+      real_t x, y, z;
+      real_t r, g, b;
+
+      bool found_color = parseVertexWithColor(&x, &y, &z, &r, &g, &b, &token);
+      if (callback.vertex_cb) {
+        callback.vertex_cb(user_data, x, y, z, r);  // r=w is optional
+      }
+      if (callback.vertex_color_cb) {
+        callback.vertex_color_cb(user_data, x, y, z, r, g, b, found_color);
+      }
+      continue;
+    }
+
+    // normal
+    if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) {
+      token += 3;
+      real_t x, y, z;
+      parseReal3(&x, &y, &z, &token);
+      if (callback.normal_cb) {
+        callback.normal_cb(user_data, x, y, z);
+      }
+      continue;
+    }
+
+    // texcoord
+    if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) {
+      token += 3;
+      real_t x, y, z;  // y and z are optional. default = 0.0
+      parseReal3(&x, &y, &z, &token);
+      if (callback.texcoord_cb) {
+        callback.texcoord_cb(user_data, x, y, z);
+      }
+      continue;
+    }
+
+    // face
+    if (token[0] == 'f' && IS_SPACE((token[1]))) {
+      token += 2;
+      token += strspn(token, " \t");
+
+      indices.clear();
+      while (!IS_NEW_LINE(token[0])) {
+        vertex_index_t vi = parseRawTriple(&token);
+
+        index_t idx;
+        idx.vertex_index = vi.v_idx;
+        idx.normal_index = vi.vn_idx;
+        idx.texcoord_index = vi.vt_idx;
+
+        indices.push_back(idx);
+        size_t n = strspn(token, " \t\r");
+        token += n;
+      }
+
+      if (callback.index_cb && indices.size() > 0) {
+        callback.index_cb(user_data, &indices.at(0),
+                          static_cast<int>(indices.size()));
+      }
+
+      continue;
+    }
+
+    // use mtl
+    if ((0 == strncmp(token, "usemtl", 6)) && IS_SPACE((token[6]))) {
+      token += 7;
+      std::stringstream ss;
+      ss << token;
+      std::string namebuf = ss.str();
+
+      int newMaterialId = -1;
+      std::map<std::string, int>::const_iterator it =
+          material_map.find(namebuf);
+      if (it != material_map.end()) {
+        newMaterialId = it->second;
+      } else {
+        // { warn!! material not found }
+        if (warn && (!callback.usemtl_cb)) {
+          (*warn) += "material [ " + namebuf + " ] not found in .mtl\n";
+        }
+      }
+
+      if (newMaterialId != material_id) {
+        material_id = newMaterialId;
+      }
+
+      if (callback.usemtl_cb) {
+        callback.usemtl_cb(user_data, namebuf.c_str(), material_id);
+      }
+
+      continue;
+    }
+
+    // load mtl
+    if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) {
+      if (readMatFn) {
+        token += 7;
+
+        std::vector<std::string> filenames;
+        SplitString(std::string(token), ' ', '\\', filenames);
+
+        if (filenames.empty()) {
+          if (warn) {
+            (*warn) +=
+                "Looks like empty filename for mtllib. Use default "
+                "material. \n";
+          }
+        } else {
+          bool found = false;
+          for (size_t s = 0; s < filenames.size(); s++) {
+            if (material_filenames.count(filenames[s]) > 0) {
+              found = true;
+              continue;
+            }
+
+            std::string warn_mtl;
+            std::string err_mtl;
+            bool ok = (*readMatFn)(filenames[s].c_str(), &materials,
+                                   &material_map, &warn_mtl, &err_mtl);
+
+            if (warn && (!warn_mtl.empty())) {
+              (*warn) += warn_mtl;  // This should be warn message.
+            }
+
+            if (err && (!err_mtl.empty())) {
+              (*err) += err_mtl;
+            }
+
+            if (ok) {
+              found = true;
+              material_filenames.insert(filenames[s]);
+              break;
+            }
+          }
+
+          if (!found) {
+            if (warn) {
+              (*warn) +=
+                  "Failed to load material file(s). Use default "
+                  "material.\n";
+            }
+          } else {
+            if (callback.mtllib_cb) {
+              callback.mtllib_cb(user_data, &materials.at(0),
+                                 static_cast<int>(materials.size()));
+            }
+          }
+        }
+      }
+
+      continue;
+    }
+
+    // group name
+    if (token[0] == 'g' && IS_SPACE((token[1]))) {
+      names.clear();
+
+      while (!IS_NEW_LINE(token[0])) {
+        std::string str = parseString(&token);
+        names.push_back(str);
+        token += strspn(token, " \t\r");  // skip tag
+      }
+
+      assert(names.size() > 0);
+
+      if (callback.group_cb) {
+        if (names.size() > 1) {
+          // create const char* array.
+          names_out.resize(names.size() - 1);
+          for (size_t j = 0; j < names_out.size(); j++) {
+            names_out[j] = names[j + 1].c_str();
+          }
+          callback.group_cb(user_data, &names_out.at(0),
+                            static_cast<int>(names_out.size()));
+
+        } else {
+          callback.group_cb(user_data, NULL, 0);
+        }
+      }
+
+      continue;
+    }
+
+    // object name
+    if (token[0] == 'o' && IS_SPACE((token[1]))) {
+      // @todo { multiple object name? }
+      token += 2;
+
+      std::stringstream ss;
+      ss << token;
+      std::string object_name = ss.str();
+
+      if (callback.object_cb) {
+        callback.object_cb(user_data, object_name.c_str());
+      }
+
+      continue;
+    }
+
+#if 0  // @todo
+    if (token[0] == 't' && IS_SPACE(token[1])) {
+      tag_t tag;
+
+      token += 2;
+      std::stringstream ss;
+      ss << token;
+      tag.name = ss.str();
+
+      token += tag.name.size() + 1;
+
+      tag_sizes ts = parseTagTriple(&token);
+
+      tag.intValues.resize(static_cast<size_t>(ts.num_ints));
+
+      for (size_t i = 0; i < static_cast<size_t>(ts.num_ints); ++i) {
+        tag.intValues[i] = atoi(token);
+        token += strcspn(token, "/ \t\r") + 1;
+      }
+
+      tag.floatValues.resize(static_cast<size_t>(ts.num_reals));
+      for (size_t i = 0; i < static_cast<size_t>(ts.num_reals); ++i) {
+        tag.floatValues[i] = parseReal(&token);
+        token += strcspn(token, "/ \t\r") + 1;
+      }
+
+      tag.stringValues.resize(static_cast<size_t>(ts.num_strings));
+      for (size_t i = 0; i < static_cast<size_t>(ts.num_strings); ++i) {
+        std::stringstream ss;
+        ss << token;
+        tag.stringValues[i] = ss.str();
+        token += tag.stringValues[i].size() + 1;
+      }
+
+      tags.push_back(tag);
+    }
+#endif
+
+    // Ignore unknown command.
+  }
+
+  if (err) {
+    (*err) += errss.str();
+  }
+
+  return true;
+}
+
+bool ObjReader::ParseFromFile(const std::string &filename,
+                              const ObjReaderConfig &config) {
+  std::string mtl_search_path;
+
+  if (config.mtl_search_path.empty()) {
+    //
+    // split at last '/'(for unixish system) or '\\'(for windows) to get
+    // the base directory of .obj file
+    //
+    size_t pos = filename.find_last_of("/\\");
+    if (pos != std::string::npos) {
+      mtl_search_path = filename.substr(0, pos);
+    }
+  } else {
+    mtl_search_path = config.mtl_search_path;
+  }
+
+  valid_ = LoadObj(&attrib_, &shapes_, &materials_, &warning_, &error_,
+                   filename.c_str(), mtl_search_path.c_str(),
+                   config.triangulate, config.vertex_color);
+
+  return valid_;
+}
+
+bool ObjReader::ParseFromString(const std::string &obj_text,
+                                const std::string &mtl_text,
+                                const ObjReaderConfig &config) {
+  std::stringbuf obj_buf(obj_text);
+  std::stringbuf mtl_buf(mtl_text);
+
+  std::istream obj_ifs(&obj_buf);
+  std::istream mtl_ifs(&mtl_buf);
+
+  MaterialStreamReader mtl_ss(mtl_ifs);
+
+  valid_ = LoadObj(&attrib_, &shapes_, &materials_, &warning_, &error_,
+                   &obj_ifs, &mtl_ss, config.triangulate, config.vertex_color);
+
+  return valid_;
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+}  // namespace tinyobj
+
+#endif