int main()
{
// Create and initialize window.
setErrorCallbackAndInit(error_callback);
GraphicsWindow* window = new GraphicsWindow(1200,800,"Test Window",NULL,NULL,key_callback);
window->makeContextCurrent();
// Initalize glew.
initGlew();
// Create and initialize Camera
FreeCamera* camera = new FreeCamera(45.0f, 16.0f/9.0f,
0.0f, 0.0f,
0.1f, 10000.0f,
0.0004f, 3.0f,
glm::vec3(0,0,-50),
glm::vec3(0,1,0),
glm::vec3(0,0,0),
true);
camera->setViewport(window->getWindowWidth(),window->getWindowHeight(),0.5f,0.5f);
// Load accumulation shader for accumulating all the transparent matrials, as well as their alphas.
GLSLProgram* defaultShader = new GLSLProgram();
defaultShader->initShaderProgram("Vert.glsl","","","","Frag.glsl");
// Load screen filling quad shader.
GLSLProgram* screenFillingQuadShader = new GLSLProgram();
screenFillingQuadShader->initShaderProgram("screenFillingQuadVert.glsl","","","","screenFillingQuadFrag.glsl");
// Load accumulation shader for accumulating all the transparent matrials, as well as their alphas.
GLSLProgram* accumTransparencyRevealageShader = new GLSLProgram();
accumTransparencyRevealageShader->initShaderProgram("AccumTransparencyRevealageVert.glsl","","","","AccumTransparencyRevealageFrag.glsl");
// Load Weighted Average shader, which will be used for final compositing (a variation of screen filling quad shader using multiple textures).
GLSLProgram* newOITCoverageShader = new GLSLProgram();
newOITCoverageShader->initShaderProgram("NewOITCoverageVert.glsl","","","","NewOITCoverageFrag.glsl");
// Create screen filling quad.
Quad* screenFillingQuad = new Quad(glm::vec3(-1.0,1.0,0), glm::vec3(-1.0,-1.0,0), glm::vec3(1.0,-1.0,0), glm::vec3(1.0,1.0,0), glm::vec3(0), 0, 0, 0);
screenFillingQuad->initQuad();
screenFillingQuad->setGLSLProgram(*newOITCoverageShader);
TextureManager::GetInstance().loadTexture("../Content/Textures/Particle_Smoke/smoke_particle_red_base.png");
TextureManager::GetInstance().loadTexture("../Content/Textures/Particle_Smoke/smoke_particle_grey_base_2.png");
TextureManager::GetInstance().loadTexture("../Content/Textures/Particle_Smoke/smoke_particle_grey_base_3.png");
Quad* quad1 = new Quad(glm::vec3(100+100,100+100,-1), glm::vec3(100+100,-100+100,-1), glm::vec3(-100+100,-100+100,-1), glm::vec3(-100+100,100+100,-1), glm::vec3(0), 10, 10, 0);
quad1->initQuad();
quad1->initDefaultTexture(255,0,0,89);
quad1->setTexture(TextureManager::GetInstance().getTextureHandle("../Content/Textures/Particle_Smoke/smoke_particle_grey_base_3.png"));
Quad* quad2 = new Quad(glm::vec3(100+100,100+100,-20), glm::vec3(100+100,-100+100,-20), glm::vec3(-100+100,-100+100,-20), glm::vec3(-100+100,100+100,-20), glm::vec3(0), 10, 10, 0);
quad2->initQuad();
quad2->initDefaultTexture(0,255,0,89);
quad2->setTexture(TextureManager::GetInstance().getTextureHandle("../Content/Textures/Particle_Smoke/smoke_particle_grey_base_2.png"));
Quad* quad3 = new Quad(glm::vec3(100+100,100+100,20), glm::vec3(100+100,-100+100,20), glm::vec3(-100+100,-100+100,20), glm::vec3(-100+100,100+100,20), glm::vec3(0), 10, 10, 0);
quad3->initQuad();
quad3->initDefaultTexture(0,0,255,89);
quad3->setTexture(TextureManager::GetInstance().getTextureHandle("../Content/Textures/Particle_Smoke/smoke_particle_red_base.png"));
Quad* quad4 = new Quad(glm::vec3(100+100,100+100,-40), glm::vec3(100+100,-100+100,-40), glm::vec3(-100+100,-100+100,-40), glm::vec3(-100+100,100+100,-40), glm::vec3(0), 10, 10, 0);
quad4->initQuad();
quad4->initDefaultTexture(255,0,127,50);
Quad* quad5 = new Quad(glm::vec3(100+100,100+100,40), glm::vec3(100+100,-100+100,40), glm::vec3(-100+100,-100+100,40), glm::vec3(-100+100,100+100,40), glm::vec3(0), 10, 10, 0);
quad5->initQuad();
quad5->initDefaultTexture(255,127,0,50);
ModelLoader* modelImporter = new ModelLoader();
modelImporter->importModel("../Content/Models/crytek-sponza/sponza.obj", processFlagsOnModelImport);
// Create and initialize model
Model* model = new Model(glm::vec3(0,0,0), "../Content/Models/crytek-sponza/");
model->loadModel(modelImporter->getScene());
// Create framebuffers
std::vector<unsigned int> activeColorAttachmentsOpaque;
std::vector<unsigned int> activeColorAttachmentsTransparent;
Framebuffer* opaqueFrameBuffer = new Framebuffer(window->getWindowWidth(),window->getWindowHeight());
activeColorAttachmentsOpaque.push_back(0);
opaqueFrameBuffer->setColorAttachment(0);
//frameBuffer->setDepthAttachment();
opaqueFrameBuffer->setDepthStencilTexture();
opaqueFrameBuffer->unbind();
Framebuffer* accumFrameBuffer = new Framebuffer(window->getWindowWidth(),window->getWindowHeight());
activeColorAttachmentsTransparent.push_back(0);
activeColorAttachmentsTransparent.push_back(1);
accumFrameBuffer->setColorAttachment(0);
accumFrameBuffer->setColorAttachment(1);
//frameBuffer->setDepthAttachment();
accumFrameBuffer->setDepthStencilTexture();
accumFrameBuffer->unbind();
// Additional textures to pass for the second transparency render pass.
std::vector<GLuint> additionalTextureHandles;
additionalTextureHandles.push_back(accumFrameBuffer->getColorAttachment(0));
additionalTextureHandles.push_back(accumFrameBuffer->getColorAttachment(1));
std::vector<GLuint> opaqueTextureHandle;
opaqueTextureHandle.push_back(opaqueFrameBuffer->getColorAttachment(0));
// Move this to "GraphicsWindow"
glfwSetCursorPos(window->getWindowHandle(), (double) (window->getWindowWidth()/2.0), (double) (window->getWindowHeight()/2.0));
// Move this to "Camera"
//glClearColor(0.4f,0.6f,0.94f,0.0f);
glClearColor(0.0f,0.0f,0.0f,0.0f);
const float clearColorWhite = 1.0f;
const float clearColorBlack = 0.0f;
// Sampler
GLuint sampler = 0;
glGenSamplers(1, &sampler);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_REPEAT);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_REPEAT);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
check_gl_error();
// Render Loop
while(!window->shouldClose())
{
//glClearColor(0.0f,0.0f,0.0f,0.0f);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
// Update camera
camera->camControll(window->getWindowHandle());
camera->update();
// Update shader uniforms
model->getCurrentGLSLProgram()->use();
model->getCurrentGLSLProgram()->setUniform("lightPosition", camera->getCamPos());
model->getCurrentGLSLProgram()->setUniform("camPosition", camera->getCamPos());
model->getCurrentGLSLProgram()->setUniform("viewMatrix", camera->getVMatrix());
model->getCurrentGLSLProgram()->setUniform("normalMatrix", camera->getTranspInvMVMatrix()); // Change this!
model->getCurrentGLSLProgram()->setUniform("VPMatrix", camera->getVPMatrix());
opaqueFrameBuffer->clean();
opaqueFrameBuffer->bind();
opaqueFrameBuffer->bindForRenderPass(activeColorAttachmentsOpaque);
model->renderOpaque();
//quad4->render();
//quad5->render();
//opaqueFrameBuffer->unbind();
//// Blitting the opaque scene depth to propperly depth test the transparen against it.
//opaqueFrameBuffer->bindForReading();
//accumFrameBuffer->bindForWriting();
//glBlitFramebuffer(0, 0, window->getWindowWidth(), window->getWindowHeight(), 0, 0, window->getWindowWidth(), window->getWindowHeight(),
// GL_DEPTH_BUFFER_BIT, GL_NEAREST);
//opaqueFrameBuffer->unbind();
//_______________________________________________________________________________________________________________________________________________________________________________
// Acuumulation pass
accumTransparencyRevealageShader->use();
accumTransparencyRevealageShader->setUniform("VPMatrix", camera->getVPMatrix());
model->setGLSLProgram(accumTransparencyRevealageShader);
quad1->setGLSLProgram(*accumTransparencyRevealageShader);
quad2->setGLSLProgram(*accumTransparencyRevealageShader);
quad3->setGLSLProgram(*accumTransparencyRevealageShader);
quad4->setGLSLProgram(*accumTransparencyRevealageShader);
quad5->setGLSLProgram(*accumTransparencyRevealageShader);
accumFrameBuffer->clean();
accumFrameBuffer->bind();
accumFrameBuffer->bindForRenderPass(activeColorAttachmentsTransparent);
accumFrameBuffer->cleanColorAttachment(1,clearColorWhite);
opaqueFrameBuffer->unbind();
// Blitting the opaque scene depth to propperly depth test the transparen against it.
opaqueFrameBuffer->bindForReading();
accumFrameBuffer->bindForWriting();
glBlitFramebuffer(0, 0, window->getWindowWidth(), window->getWindowHeight(), 0, 0, window->getWindowWidth(), window->getWindowHeight(),
GL_DEPTH_BUFFER_BIT, GL_NEAREST);
opaqueFrameBuffer->unbind();
accumFrameBuffer->bind();
accumFrameBuffer->bindForRenderPass(activeColorAttachmentsTransparent);
glEnable(GL_BLEND);
glBlendFunci(0, GL_ONE, GL_ONE);
glBlendFunci(1, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA);
//glEnable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glDisable(GL_CULL_FACE);
model->renderTransparent();
quad1->render();
quad2->render();
quad3->render();
//quad4->render();
//quad5->render();
accumFrameBuffer->unbind();
model->setGLSLProgram(defaultShader);
quad1->setGLSLProgram(*defaultShader);
quad2->setGLSLProgram(*defaultShader);
quad3->setGLSLProgram(*defaultShader);
quad4->setGLSLProgram(*defaultShader);
quad5->setGLSLProgram(*defaultShader);
glDisable(GL_BLEND);
//glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
//_______________________________________________________________________________________________________________________________________________________________________________
// Final compositing pass
//screenFillingQuad->setGLSLProgram(*screenFillingQuadShader);
//screenFillingQuad->getCurrentShaderProgram()->use();
//screenFillingQuad->renderWithAdditionalTextures(opaqueTextureHandle,sampler);
newOITCoverageShader->use();
glDepthMask(GL_FALSE);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA);
screenFillingQuad->renderWithAdditionalTextures(additionalTextureHandles,sampler);
glDepthMask(GL_TRUE);
glDisable(GL_BLEND);
//_______________________________________________________________________________________________________________________________________________________________________________
// For debug!
//screenFillingQuad->setGLSLProgram(*screenFillingQuadShader);
//screenFillingQuad->getCurrentShaderProgram()->use();
//screenFillingQuad->setTexture(opaqueFrameBuffer->getColorAttachment(0));
//screenFillingQuad->render();
accumFrameBuffer->clean();
window->swapBuffers();
glfwPollEvents();
check_gl_error();
}
glfwTerminate();
window->release();
return 0;
}
