LeeMcQueen
commented
3 years ago include "WaterFrameBuffers.h"
WaterFrameBuffers::WaterFrameBuffers(){
//加载反射buffer
initReflectionBuffer();
//加载折射buffer
initRefractionBuffer();}
//WaterFrameBuffers::~WaterFrameBuffers(){}
void WaterFrameBuffers::initReflectionBuffer(){
//生成帧缓冲
reflectionFrameBuffer_ = createFrameBuffer();
//反射帧缓冲图像纹理
reflectionTexture_ = createTextureAttachment(REFLECTION_WIDTH, REFLECTION_HEIGHT);
//反射帧缓冲深度
reflectionDepthBuffer_ = createDepthBufferAttachment(REFLECTION_WIDTH, REFLECTION_HEIGHT);
unbindCurrentFrameBuffer();}
void WaterFrameBuffers::initRefractionBuffer(){
//生成帧缓冲
refractionFrameBuffer_ = createFrameBuffer();
//折射帧缓冲图像纹理
refractionTexture_ = createTextureAttachment(REFRACTION_WIDTH, REFRACTION_HEIGHT);
//折射帧缓存深度纹理
refractionDepthTexture_ = createDepthTextureAttachment(REFRACTION_WIDTH, REFRACTION_HEIGHT);
unbindCurrentFrameBuffer();}
//生成帧缓冲 unsigned int WaterFrameBuffers::createFrameBuffer(){
//生成帧缓冲对象
unsigned int frameBuffer;
glGenFramebuffers(1, &frameBuffer);
//绑定帧缓冲
glBindFramebuffer(GL_FRAMEBUFFER, frameBuffer);
//颜色缓冲设定
glDrawBuffer(GL_COLOR_ATTACHMENT0);
return frameBuffer;}
//帧缓冲图像纹理 unsigned int WaterFrameBuffers::createTextureAttachment(int width, int height){
//生成帧缓冲的图像纹理
unsigned int texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//帧缓冲的图像纹理
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture, 0);
return texture;}
//帧缓冲深度纹理 unsigned int WaterFrameBuffers::createDepthTextureAttachment(int width, int height){
//生成帧缓冲的纹理
unsigned int texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32, width, height, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//帧缓冲的深度纹理
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, texture, 0);
return texture;}
unsigned int WaterFrameBuffers::createDepthBufferAttachment(int width, int height){
unsigned int depthBuffer;
glGenRenderbuffers(1, &depthBuffer);
glBindRenderbuffer(GL_RENDERBUFFER, depthBuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
//将渲染缓冲区挂载到当前帧缓冲区上
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthBuffer);
return depthBuffer;}
void WaterFrameBuffers::bindFrameBuffer(unsigned int framebuffer, int width, int height){
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
glViewport(0, 0 , width, height);}
void WaterFrameBuffers::unbindCurrentFrameBuffer() {
glBindTexture(GL_TEXTURE_2D, 0);
glViewport(0, 0, 1280, 720);}
void WaterFrameBuffers::bindReflectionFrameBuffer() {
bindFrameBuffer(reflectionFrameBuffer_, REFLECTION_WIDTH, REFLECTION_HEIGHT);}
void WaterFrameBuffers::bindRefractionFrameBuffer() {
bindFrameBuffer(refractionFrameBuffer_, REFRACTION_WIDTH, REFRACTION_HEIGHT);}
void WaterFrameBuffers::cleanUp(){
glDeleteFramebuffers(1, &reflectionFrameBuffer_);
glDeleteTextures(1, &reflectionTexture_);
glDeleteRenderbuffers(1, &reflectionDepthBuffer_);
glDeleteFramebuffers(1, &refractionFrameBuffer_);
glDeleteTextures(1, &refractionTexture_);
glDeleteTextures(1, &refractionDepthTexture_);}
unsigned int WaterFrameBuffers::createTextureAttachment(int width, int height){
}