Deferred rendering base mostly complete.
This commit is contained in:
Tleety
+106
-112
@@ -115,8 +115,14 @@ void Renderer::LoadContent()
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m_FirstPassProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/First_pass.vert.glsl")));
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m_FirstPassProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/First_pass.frag.glsl")));
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m_FirstPassProgram.Compile();
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BindFragDataLocation();
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m_FirstPassProgram.Link();
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m_SecondPassProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Second_pass.vert.glsl")));
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m_SecondPassProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Second_pass.frag.glsl")));
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m_SecondPassProgram.Compile();
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m_SecondPassProgram.Link();
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m_Skybox = std::make_shared<Skybox>("Textures/Skybox/Sunset", "jpg");
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m_DebugAABB = CreateAABB();
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@@ -538,137 +544,125 @@ void Renderer::ClearStuff()
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void Renderer::FrameBufferTextures()
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{
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m_fb = 0;
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m_fDepthBuffer = 0;
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glGenFramebuffers(1, &m_fb);
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GLERROR("GLERROR: Failed to generate frame buffer");
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glGenTextures(1, &m_fb_PositionTexture);
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GLERROR("GLERROR: Failed to generate Position texture");
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glBindTexture(GL_TEXTURE_2D, m_fb_PositionTexture);
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GLERROR("GLERROR: Failed to bind Position texture");
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glTexImage2D(
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GL_TEXTURE_2D,
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0,
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GL_RGB16F,
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WIDTH,
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HEIGHT,
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0,
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GL_RGBA,
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GL_UNSIGNED_BYTE,
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NULL
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);
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GLERROR("GLERROR: Failed to generate Position texture image");
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glGenRenderbuffers(1, &m_fDepthBuffer);
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glBindRenderbuffer(GL_RENDERBUFFER, m_fDepthBuffer);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, WIDTH, HEIGHT);
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//Generate and bind diffuse texture
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glGenTextures(1, &m_fDiffuseTexture);
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glBindTexture(GL_TEXTURE_2D, m_fDiffuseTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, WIDTH, HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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GLERROR("GLERROR: Failed to generate Position Parameters");
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glGenTextures(1, &m_fb_NormalsTexture);
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GLERROR("GLERROR: Failed to generate Normal texture");
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glBindTexture(GL_TEXTURE_2D, m_fb_NormalsTexture);
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GLERROR("GLERROR: Failed to bind Normal texture");
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glTexImage2D(
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GL_TEXTURE_2D,
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0,
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GL_RGB16F,
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WIDTH,
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HEIGHT,
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0,
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GL_RGBA,
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GL_UNSIGNED_BYTE,
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NULL
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);
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GLERROR("GLERROR: Failed to generate Normal texture image");
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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//Generate and bind position texture
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glGenTextures(1, &m_fPositionTexture);
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glBindTexture(GL_TEXTURE_2D, m_fPositionTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, WIDTH, HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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GLERROR("GLERROR: Failed to generate Normals Parameters");
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//Generate and bind normal texture
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glGenTextures(1, &m_fNormalsTexture);
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glBindTexture(GL_TEXTURE_2D, m_fNormalsTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, WIDTH, HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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//Generate and bind blend texture
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glGenTextures(1, &m_fBlendTexture);
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glBindTexture(GL_TEXTURE_2D, m_fBlendTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, WIDTH, HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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//Bind fb
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glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
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GLERROR("GLERROR: Failed to bind framebuffer");
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_fb_PositionTexture, 0);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, m_fb_NormalsTexture, 0);
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GLERROR("GLERROR: Failed to FrameBufferTexture2D");
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_fDepthBuffer);
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m_rb = 0;
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glGenRenderbuffers(1, &m_rb);
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GLERROR("GLERROR: Failed to generate RenderBuffer");
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glBindRenderbuffer(GL_RENDERBUFFER, m_rb);
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GLERROR("GLERROR: Failed to bind RenderBuffer");
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, WIDTH, HEIGHT);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_rb);
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draw_bufs[1] = GL_COLOR_ATTACHMENT0;
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draw_bufs[2] = GL_COLOR_ATTACHMENT1;
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//Attach textures to the FB
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_fDiffuseTexture, 0);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, m_fPositionTexture, 0);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, m_fNormalsTexture, 0);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, m_fBlendTexture, 0);
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GLenum fbStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if(fbStatus != GL_FRAMEBUFFER_COMPLETE)
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{
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printf("DeferredLighting:Init: FrameBuffer incomplete: 0x%x\n", fbStatus);
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exit(1);
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}
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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void Renderer::DrawFBO()
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{
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_fb);
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GLenum windowBuffClear[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2, GL_COLOR_ATTACHMENT3 };
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glDrawBuffers(4, windowBuffClear);
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE);
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glCullFace(GL_BACK);
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#ifdef DEBUG
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glDisable(GL_CULL_FACE);
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glPolygonMode(GL_BACK, GL_LINE);
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#endif
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// Draw models
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glm::mat4 depthViewMatrix = glm::lookAt(m_SunPosition, m_SunTarget, glm::vec3(0, 1, 0)) * glm::translate(-m_Camera->Position() * glm::vec3(1, 0, 0));
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glm::mat4 depthCamera = m_SunProjection * depthViewMatrix;
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glm::mat4 biasMatrix(
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0.5, 0.0, 0.0, 0.0,
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0.0, 0.5, 0.0, 0.0,
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0.0, 0.0, 0.5, 0.0,
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0.5, 0.5, 0.5, 1.0
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);
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// Execute the first render stage which will fill out the internal buffers with data(??)
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//EnableRenderProgramStage1;
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GLenum windowBuffOpaque[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2, GL_NONE };
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glDrawBuffers(4, windowBuffOpaque);
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//DrawTheWorld();
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m_ShaderProgram.Bind();
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if (m_DrawWireframe)
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{
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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}
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glm::mat4 cameraMatrix = m_Camera->ProjectionMatrix() * m_Camera->ViewMatrix();
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glm::mat4 depthCameraMatrix = biasMatrix * depthCamera;
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glm::mat4 MVP;
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glm::mat4 depthMVP;
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for (auto tuple : ModelsToRender)
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{
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Model* model;
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glm::mat4 modelMatrix;
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bool visible;
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std::tie(model, modelMatrix, visible, std::ignore) = tuple;
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if (!visible)
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continue;
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GLenum windowBuffTransp[] = { GL_NONE, GL_NONE, GL_NONE, GL_COLOR_ATTACHMENT3 };
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glDrawBuffers(4, windowBuffTransp);
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glEnable(GL_BLEND);
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glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
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//Depth buffer shall not be updated
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glDepthMask(GL_FALSE);
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//DrawTransparent items
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glDepthMask(GL_TRUE);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glDisable(GL_BLEND);
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
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MVP = cameraMatrix * modelMatrix;
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depthMVP = depthCameraMatrix * modelMatrix;
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glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "M"), 1, GL_FALSE, glm::value_ptr(modelMatrix));
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glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "V"), 1, GL_FALSE, glm::value_ptr( m_Camera->ViewMatrix()));
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glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "P"), 1, GL_FALSE, glm::value_ptr(m_Camera->ProjectionMatrix()));
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glBindVertexArray(model->VAO);
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// for (auto texGroup : model->TextureGroups)
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// {
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// glActiveTexture(GL_TEXTURE0);
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// glBindTexture(GL_TEXTURE_2D, *texGroup.Texture);
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// glDrawArrays(GL_TRIANGLES, texGroup.StartIndex, texGroup.EndIndex - texGroup.StartIndex + 1);
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// }
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}
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//Probably means to use the second_pass shader
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//EnableRenderProgramDeferredStage();
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#ifdef DEBUG
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// Debug draw model normals
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if (m_DrawNormals)
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{
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m_ShaderProgramNormals.Bind();
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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DrawModels(m_ShaderProgramNormals);
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}
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#endif
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
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//SetupDefferedStageUniforms(); // Probably what we do in FrameBufferTextures();
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//glEnableVertexAttribArray(fVertexIndex); // VertexIndex?
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glActiveTexture(GL_TEXTURE3);
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glBindTexture(GL_TEXTURE_2D, m_fBlendTexture);
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glActiveTexture(GL_TEXTURE2);
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glBindTexture(GL_TEXTURE_2D, m_fNormalsTexture);
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glActiveTexture(GL_TEXTURE1);
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glBindTexture(GL_TEXTURE_2D, m_fPositionTexture);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, m_fDiffuseTexture);
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//DrawSimpleSquare(); //I guess this draw a square and put the textures on it
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//glDisableVertexAttribArray(fVertexIndex); //VertexIndex?
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//glDrawBuffers(2, draw_bufs);
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}
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void Renderer::BindFragDataLocation()
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{
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glBindFragDataLocation(m_FirstPassProgram.GetHandle(), 0, "diffuseOutput");
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glBindFragDataLocation(m_FirstPassProgram.GetHandle(), 1, "posOutput");
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glBindFragDataLocation(m_FirstPassProgram.GetHandle(), 2, "normOutput");
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glBindFragDataLocation(m_FirstPassProgram.GetHandle(), 3, "blendOutput");
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}
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