From a556b45abf18f1bd509daaf63b66b7d55e9fd291 Mon Sep 17 00:00:00 2001
From: jjesswan <jessica_wan@brown.edu>
Date: Mon, 22 Apr 2024 21:56:26 -0400
Subject: add engine version

---
 engine-ocean/Graphics/camera.cpp | 124 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 engine-ocean/Graphics/camera.cpp

(limited to 'engine-ocean/Graphics/camera.cpp')

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;
+}
-- 
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