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#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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