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/Game/Environment/grassenvironment.cpp | 85 ++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 engine-ocean/Game/Environment/grassenvironment.cpp

(limited to 'engine-ocean/Game/Environment/grassenvironment.cpp')

diff --git a/engine-ocean/Game/Environment/grassenvironment.cpp b/engine-ocean/Game/Environment/grassenvironment.cpp
new file mode 100644
index 0000000..1d1ed9b
--- /dev/null
+++ b/engine-ocean/Game/Environment/grassenvironment.cpp
@@ -0,0 +1,85 @@
+#include "grassenvironment.h"
+#include "Game/Components/CollisionComponents/BoundingTriangle.h"
+#include "Game/Components/CollisionComponents/CollisionComponent.h"
+#include "Game/Components/TransformComponent.h"
+#include "Game/GameObjects/GameObject.h"
+#include "Graphics/global.h"
+
+GrassEnvironment::GrassEnvironment(std::map<std::string, std::shared_ptr<GameObject>>& rigid_gameobjects,
+                                   std::map<std::string, std::shared_ptr<GameObject>>& dynamic_gameobjects,
+                                   std::shared_ptr<Camera> camera):
+    m_rigid_gameobjects(rigid_gameobjects),
+    m_dynamic_gameobjects(dynamic_gameobjects),
+    m_camera(camera)
+{
+
+    initializeGrassVBO();
+}
+
+void GrassEnvironment::initializeGrassVBO(){
+//    grass_tex = Global::graphics.loadTextureFromFile("/Users/jesswan/Desktop/cs1950u/cs1950u-jjesswan/Resources/Images/meadow_texture_atlas.png").textureID;
+//    wind_tex = Global::graphics.loadTextureFromFile("/Users/jesswan/Desktop/cs1950u/cs1950u-jjesswan/Resources/Images/wind_flowmap1.png").textureID;
+//    meadow_tex = Global::graphics.loadTextureFromFile("/Users/jesswan/Desktop/cs1950u/cs1950u-jjesswan/Resources/Images/meadow_flower_map.png").textureID;
+
+
+//    std::vector<glm::vec3> surface_points = m_rigid_gameobjects["ground"]->getComponent<CollisionComponent>()->getCollisionShape<BoundingTriangle>()->getSurfacePoints();
+//    positions.insert(std::end(positions), std::begin(surface_points), std::end(surface_points));
+
+
+//     glGenVertexArrays(1, &VAO);
+//     glGenBuffers(1, &VBO);
+//     glBindVertexArray(VAO);
+
+//     glBindBuffer(GL_ARRAY_BUFFER, VBO);
+//     glBufferData(GL_ARRAY_BUFFER, positions.size()*sizeof(glm::vec3), positions.data(), GL_STATIC_DRAW);
+
+//     glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(float), (void*)0);
+
+//     // unbind
+//     glEnableVertexAttribArray(0);
+//     glBindBuffer(GL_ARRAY_BUFFER, 0);
+}
+
+glm::vec2 GrassEnvironment::getRandomOffset(int ub, int numRows){
+    int index = floor(Global::graphics.generateRandomNumbers(0, ub));
+    int column = index % numRows;
+    float xoffset = static_cast<float>(column)/static_cast<float>(numRows);
+
+    int row = floor(index/numRows);
+    float yOffset = static_cast<float>(row)/static_cast<float>(numRows);
+    return glm::vec2(xoffset, yOffset);
+}
+
+void GrassEnvironment::draw(){
+    // draw grass
+    glPointSize(8.f);
+    Global::graphics.bindShader("grass");
+
+    // activate texture
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, grass_tex);
+
+    glActiveTexture(GL_TEXTURE1);
+    glBindTexture(GL_TEXTURE_2D, wind_tex);
+
+    glActiveTexture(GL_TEXTURE7);
+    glBindTexture(GL_TEXTURE_2D, meadow_tex);
+
+    // update time
+    glUniform1f(glGetUniformLocation(Global::graphics.getShaderID("grass"), "u_time"), glfwGetTime()*.1f);
+    // update player pos
+    glm::vec3 playerPos = m_dynamic_gameobjects.at("player")->getComponent<TransformComponent>()->getPos();
+    glUniform3f(glGetUniformLocation(Global::graphics.getShaderID("grass"), "playerPos"), playerPos.x, playerPos.y, playerPos.z);
+
+    //glm::vec2 offset = getRandomOffset(4, 2);
+    // update offset
+    //glUniform2f(glGetUniformLocation(Global::graphics.getShaderID("grass"), "atlas_offset"), offset.x, offset.y);
+
+
+    Global::graphics.setCameraData(m_camera);
+    Global::graphics.setGlobalData(glm::vec3(.5f));
+    glBindVertexArray(VAO);
+    glDrawArrays(GL_POINTS, 0, positions.size());
+};
+
+void GrassEnvironment::update(double deltaTime){};
-- 
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