Merge pull request #33 from teamfisk/Forward+

Forward+

src/Engine/Rendering/DrawFinalPass.cpp

@@ -0,0 +1,66 @@
+#include "Rendering/DrawFinalPass.h"
+
+DrawFinalPass::DrawFinalPass(IRenderer* renderer, LightCullingPass* lightCullingPass)
+{
+    m_Renderer = renderer;
+    m_LightCullingPass = lightCullingPass;
+    InitializeTextures();
+    InitializeShaderPrograms();
+}
+
+void DrawFinalPass::InitializeTextures()
+{
+    m_WhiteTexture = ResourceManager::Load<Texture>("Textures/Core/Blank.png");
+}
+
+void DrawFinalPass::InitializeShaderPrograms()
+{
+    m_ForwardPlusProgram = ResourceManager::Load<ShaderProgram>("#ForwardPlusProgram");
+    m_ForwardPlusProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/ForwardPlus.vert.glsl")));
+    m_ForwardPlusProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/ForwardPlus.frag.glsl")));
+    m_ForwardPlusProgram->Compile();
+    m_ForwardPlusProgram->Link();
+}
+
+void DrawFinalPass::Draw(RenderScene& scene)
+{
+    GLERROR("DrawFinalPass::Draw: Pre");
+
+    DrawFinalPassState state;
+    m_ForwardPlusProgram->Bind();
+    GLuint shaderHandle = m_ForwardPlusProgram->GetHandle();
+
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, m_LightCullingPass->LightSSBO());
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, m_LightCullingPass->LightGridSSBO());
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 4, m_LightCullingPass->LightIndexSSBO());
+
+    glUniformMatrix4fv(glGetUniformLocation(shaderHandle, "V"), 1, GL_FALSE, glm::value_ptr(m_Renderer->Camera()->ViewMatrix()));
+    glUniformMatrix4fv(glGetUniformLocation(shaderHandle, "P"), 1, GL_FALSE, glm::value_ptr(m_Renderer->Camera()->ProjectionMatrix()));
+    glUniform2f(glGetUniformLocation(shaderHandle, "ScreenDimensions"), m_Renderer->Resolution().Width, m_Renderer->Resolution().Height);
+
+    //TODO: Render: Add code for more jobs than modeljobs.
+    for (auto &job : scene.ForwardJobs) {
+        auto modelJob = std::dynamic_pointer_cast<ModelJob>(job);
+        if(modelJob) {
+            //TODO: Kolla upp "header/include/common" shader saken så man slipper skicka in asmycket uniforms
+            glUniformMatrix4fv(glGetUniformLocation(shaderHandle, "M"), 1, GL_FALSE, glm::value_ptr(modelJob->Matrix));
+            glUniform4fv(glGetUniformLocation(shaderHandle, "Color"), 1, glm::value_ptr(modelJob->Color));
+
+            if(modelJob->DiffuseTexture != nullptr) {
+                glActiveTexture(GL_TEXTURE0);
+                glBindTexture(GL_TEXTURE_2D, modelJob->DiffuseTexture->m_Texture);
+            } else {
+                glActiveTexture(GL_TEXTURE0);
+                glBindTexture(GL_TEXTURE_2D, m_WhiteTexture->m_Texture);
+            }
+
+            glBindVertexArray(modelJob->Model->VAO);
+            glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, modelJob->Model->ElementBuffer);
+            glDrawElementsBaseVertex(GL_TRIANGLES, modelJob->EndIndex - modelJob->StartIndex + 1, GL_UNSIGNED_INT, 0, modelJob->StartIndex);
+
+            continue;
+        }
+    }
+    GLERROR("DrawFinalPass::Draw: END");
+
+}

src/Engine/Rendering/DrawFinalPassState.cpp

@@ -0,0 +1,18 @@
+#include "Rendering/DrawFinalPassState.h"
+
+
+DrawFinalPassState::DrawFinalPassState()
+{
+    BindFramebuffer(0);
+    Enable(GL_BLEND);
+    BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    Enable(GL_DEPTH_TEST);
+    Enable(GL_CULL_FACE);
+    ClearColor(glm::vec4(200.f / 255, 0.f / 255, 200.f / 255, 0.f));
+    Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+DrawFinalPassState::~DrawFinalPassState()
+{
+
+}

src/Engine/Rendering/DrawScenePass.cpp

@@ -14,7 +14,6 @@ void DrawScenePass::InitializeTextures()
 
 void DrawScenePass::InitializeShaderPrograms()
 {
-    //Gör så att shaders är en resource, tex som texture classen. Konstruktorn måste vara privat.
     m_BasicForwardProgram = ResourceManager::Load<ShaderProgram>("#BasicForwardProgram");
 
     m_BasicForwardProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/BasicForward.vert.glsl")));
@@ -26,16 +25,16 @@ void DrawScenePass::InitializeShaderPrograms()
 void DrawScenePass::Draw(RenderScene& scene)
 {
     //glBindFramebuffer(GL_FRAMEBUFFER, 0);
-    GLERROR("Renderer::Draw PickingPass");
+    GLERROR("DrawScenePass::Draw: Pre");
 
     DrawScenePassState state = DrawScenePassState();
+    m_BasicForwardProgram->Bind();
 
     for (auto &job : scene.ForwardJobs) {
         auto modelJob = std::dynamic_pointer_cast<ModelJob>(job);
         if (modelJob) {
             GLuint ShaderHandle = m_BasicForwardProgram->GetHandle();
 
-            m_BasicForwardProgram->Bind();
             //TODO: Kolla upp "header/include/common" shader saken så man slipper skicka in asmycket uniforms
             glUniformMatrix4fv(glGetUniformLocation(ShaderHandle, "M"), 1, GL_FALSE, glm::value_ptr(modelJob->Matrix));
             glUniformMatrix4fv(glGetUniformLocation(ShaderHandle, "V"), 1, GL_FALSE, glm::value_ptr(scene.Camera->ViewMatrix()));
@@ -57,7 +56,7 @@ void DrawScenePass::Draw(RenderScene& scene)
 
             //continue;
         }
-    }
     
-    GLERROR("DrawScene Error");
+    }
+    GLERROR("DrawScenePass::Draw: End");
 }

src/Engine/Rendering/LightCullingPass.cpp

@@ -0,0 +1,151 @@
+#include "Rendering/LightCullingPass.h"
+
+LightCullingPass::LightCullingPass(IRenderer* renderer)
+{
+    m_Renderer = renderer;
+    SetSSBOSizes();
+    InitializeSSBOs();
+    InitializeShaderPrograms();
+    //GenerateNewFrustum(TODO);
+}
+
+LightCullingPass::~LightCullingPass()
+{
+
+}
+
+void LightCullingPass::GenerateNewFrustum(RenderScene& scene)
+{
+    if (scene.PointLightJobs.size() == 0)
+        return;
+
+    GLERROR("CalculateFrustum Error: Pre");
+
+    m_CalculateFrustumProgram->Bind();
+
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, m_FrustumSSBO);
+    glUniformMatrix4fv(glGetUniformLocation(m_CalculateFrustumProgram->GetHandle(), "P"), 1, false, glm::value_ptr(scene.Camera->ProjectionMatrix()));
+    glUniform2f(glGetUniformLocation(m_CalculateFrustumProgram->GetHandle(), "ScreenDimensions"), m_Renderer->Resolution().Width, m_Renderer->Resolution().Height);
+    glDispatchCompute((int)(m_Renderer->Resolution().Width/(TILE_SIZE*TILE_SIZE) + 1), (int)(m_Renderer->Resolution().Height/(TILE_SIZE*TILE_SIZE) + 1), 1);
+
+    GLERROR("CalculateFrustum Error: End");
+}
+
+
+void LightCullingPass::OnResolutionChange()
+{
+    SetSSBOSizes();
+}
+
+
+void LightCullingPass::SetSSBOSizes()
+{
+    m_NumberOfTiles = (int)(m_Renderer->Resolution().Width*m_Renderer->Resolution().Height)/TILE_SIZE;
+
+    //m_Frustums = new Frustum[s];
+    //m_LightGrid = new LightGrid[s];
+    //m_LightIndex = new float[s*200];
+
+    m_Frustums = new Frustum[m_NumberOfTiles];
+    m_LightGrid = new LightGrid[m_NumberOfTiles];
+    m_LightIndex = new float[m_NumberOfTiles*MAX_LIGHTS_PER_TILE];
+}
+
+void LightCullingPass::CullLights(RenderScene& scene)
+{
+    GLERROR("CullLights Error: Pre");
+    m_LightOffset = 0;
+
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_LightOffsetSSBO);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(m_LightOffset), &m_LightOffset, GL_DYNAMIC_COPY);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_LightSSBO);
+    if (m_PointLights.size() > 0) {
+        glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(PointLight) * m_PointLights.size(), &(m_PointLights[0]), GL_DYNAMIC_COPY);
+    } else {
+        GLfloat zero = 0.f;
+        glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(GLfloat), &zero , GL_DYNAMIC_COPY);
+    }
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+
+    m_LightCullProgram->Bind();
+    glUniform2f(glGetUniformLocation(m_LightCullProgram->GetHandle(), "ScreenDimensions"), m_Renderer->Resolution().Width, m_Renderer->Resolution().Height);
+    glUniformMatrix4fv(glGetUniformLocation(m_LightCullProgram->GetHandle(), "V"), 1, false, glm::value_ptr(scene.Camera->ViewMatrix()));
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, m_FrustumSSBO);
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, m_LightSSBO);
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, m_LightGridSSBO);
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, m_LightOffsetSSBO);
+    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 4, m_LightIndexSSBO);
+    glDispatchCompute(m_Renderer->Resolution().Width / TILE_SIZE, m_Renderer->Resolution().Height / TILE_SIZE, 1);
+
+    GLERROR("CullLights Error: End");
+}
+
+void LightCullingPass::FillLightList(RenderScene& scene)
+{
+    m_PointLights.clear();
+
+    for(auto &job : scene.PointLightJobs) {
+        auto pointLightjob = std::dynamic_pointer_cast<PointLightJob>(job);
+        if (pointLightjob) {
+            PointLight p;
+            p.Color = pointLightjob->Color;
+            p.Falloff = pointLightjob->Falloff;
+            p.Intensity = pointLightjob->Intensity;
+            p.Position = glm::vec4(glm::vec3(pointLightjob->Position), 1.f);
+            p.Radius = pointLightjob->Radius;
+            p.Padding = 123.f;
+            m_PointLights.push_back(p);
+            continue;
+        }
+    }
+}
+
+void LightCullingPass::InitializeSSBOs()
+{
+    glGenBuffers(1, &m_FrustumSSBO);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_FrustumSSBO);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(Frustum)*m_NumberOfTiles, m_Frustums, GL_DYNAMIC_COPY);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+    GLERROR("m_FrustumSSBO");
+
+    glGenBuffers(1, &m_LightSSBO);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_LightSSBO);
+    if(m_PointLights.size() > 0) {
+        glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(PointLight) * m_PointLights.size(), &(m_PointLights[0]), GL_DYNAMIC_COPY);
+    }
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+    GLERROR("m_LightSSBO");
+
+    glGenBuffers(1, &m_LightGridSSBO);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_LightGridSSBO);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(LightGrid)*m_NumberOfTiles, m_LightGrid, GL_DYNAMIC_COPY);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+    GLERROR("m_LightGridSSBO");
+
+
+    glGenBuffers(1, &m_LightOffsetSSBO);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_LightOffsetSSBO);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(m_LightOffset), &m_LightOffset, GL_DYNAMIC_COPY);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+    GLERROR("m_LightOffsetSSBO");
+
+    glGenBuffers(1, &m_LightIndexSSBO);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_LightIndexSSBO);
+    glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(float)*m_NumberOfTiles*MAX_LIGHTS_PER_TILE, m_LightIndex, GL_DYNAMIC_COPY);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+    GLERROR("m_LightIndexSSBO");
+}
+
+void LightCullingPass::InitializeShaderPrograms()
+{
+    m_CalculateFrustumProgram = ResourceManager::Load<ShaderProgram>("#CalculateFrustumProgram");
+    m_CalculateFrustumProgram->AddShader(std::shared_ptr<Shader>(new ComputeShader("Shaders/GridFrustum.comp.glsl")));
+    m_CalculateFrustumProgram->Compile();
+    m_CalculateFrustumProgram->Link();
+
+    m_LightCullProgram = ResourceManager::Load<ShaderProgram>("#LightCullProgram");
+    m_LightCullProgram->AddShader(std::shared_ptr<Shader>(new ComputeShader("Shaders/CullLights.comp.glsl")));
+    m_LightCullProgram->Compile();
+    m_LightCullProgram->Link();
+}
+

src/Engine/Rendering/RenderState.cpp

@@ -3,6 +3,7 @@
 bool RenderState::Enable(GLenum cap)
 {
     if (glIsEnabled(cap)) {
+        //LOG_WARNING("Trying to enable somthing that is already enabled.");
         return false;
     }
     m_ResetFunctions.push_back(std::bind(glDisable, cap));

src/Engine/Rendering/RenderSystem.cpp

@@ -106,6 +106,29 @@ void RenderSystem::fillModels(std::list<std::shared_ptr<RenderJob>>& jobs, World
     }
 }
 
+
+void RenderSystem::fillLight(std::list<std::shared_ptr<RenderJob>>& jobs, World* world)
+{
+    auto pointLights = world->GetComponents("PointLight");
+    if (pointLights == nullptr) {
+        return;
+    }
+
+    for (auto& pointlightC : *pointLights) {
+        bool visible = pointlightC["Visible"];
+        if (!visible) {
+            continue;
+        }
+        auto transformC = world->GetComponent(pointlightC.EntityID, "Transform");
+        if (&transformC == nullptr) {
+            return;
+        }
+
+        std::shared_ptr<PointLightJob> pointLightJob = std::shared_ptr<PointLightJob>(new PointLightJob(transformC, pointlightC, m_World));
+        jobs.push_back(pointLightJob);
+    }
+}
+
 bool RenderSystem::OnInputCommand(const Events::InputCommand& e)
 {
     if (e.Command == "SwitchCamera" && e.Value > 0) {
@@ -126,11 +149,12 @@ void RenderSystem::Update(World* world, double dt)
     //Only supports opaque geometry atm
     m_RenderFrame->Clear();
 
-    RenderScene rs;
-    rs.Camera = m_Camera;
-    rs.Viewport = Rectangle(1280, 720);
-    fillModels(rs.ForwardJobs, world);
-    m_RenderFrame->Add(rs);
+    RenderScene scene;
+    scene.Camera = m_Camera;
+    scene.Viewport = Rectangle(1280, 720);
+    fillModels(scene.ForwardJobs, world);
+    fillLight(scene.PointLightJobs, world);
+    m_RenderFrame->Add(scene);
    
 }
 

src/Engine/Rendering/Renderer.cpp

@@ -92,16 +92,22 @@ void Renderer::Update(double dt)
 void Renderer::Draw(RenderFrame& frame)
 {
     glClearColor(255.f / 255, 163.f / 255, 176.f / 255, 0.f);
+    
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    
 
     m_PickingPass->ClearPicking();
     for (auto scene : frame.RenderScenes){
+    
         m_Camera = scene->Camera; // remove renderer camera when Editor uses the render scene cameras.
+        FillDepth(*scene);
         m_PickingPass->Draw(*scene);
+        m_LightCullingPass->GenerateNewFrustum(*scene);
+        m_LightCullingPass->FillLightList(*scene);
+        m_LightCullingPass->CullLights(*scene);
+        m_DrawFinalPass->Draw(*scene);
+        //m_DrawScenePass->Draw(rq);
 
-       
-
-        m_DrawScenePass->Draw(*scene);
         GLERROR("Renderer::Draw m_DrawScenePass->Draw");
     }
 
@@ -137,8 +143,8 @@ void Renderer::DrawScreenQuad(GLuint textureToDraw)
 
 void Renderer::InitializeTextures()
 {
-    m_ErrorTexture=ResourceManager::Load<Texture>("Textures/Core/ErrorTexture.png");
-    m_WhiteTexture=ResourceManager::Load<Texture>("Textures/Core/Blank.png");
+    m_ErrorTexture = ResourceManager::Load<Texture>("Textures/Core/ErrorTexture.png");
+    m_WhiteTexture = ResourceManager::Load<Texture>("Textures/Core/Blank.png");
 }
 
 void Renderer::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type)
@@ -149,7 +155,7 @@ void Renderer::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filterin
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapping);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filtering);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filtering);
-    glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, dimensions.x, dimensions.y, 0, format, type, NULL);//TODO: Renderer: Fix the precision and Resolution
+    glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, dimensions.x, dimensions.y, 0, format, type, nullptr);//TODO: Renderer: Fix the precision and Resolution
     GLERROR("Texture initialization failed");
 }
 
@@ -157,4 +163,23 @@ void Renderer::InitializeRenderPasses()
 {
     m_DrawScenePass = new DrawScenePass(this);
     m_PickingPass = new PickingPass(this, m_EventBroker);
+    m_LightCullingPass = new LightCullingPass(this);
+    m_DrawFinalPass = new DrawFinalPass(this, m_LightCullingPass);
 }
+
+//Temp func
+void Renderer::FillDepth(RenderScene& scene)
+{
+    for (auto job : scene.ForwardJobs) {
+        auto modelJob = std::dynamic_pointer_cast<ModelJob>(job);
+        if(! modelJob) {
+            return;
+        }
+
+
+        glm::vec3 abspos = Transform::AbsolutePosition(modelJob->World, modelJob->Entity);
+        glm::vec3 worldpos = glm::vec3(scene.Camera->ViewMatrix() * glm::vec4(abspos, 1));
+        modelJob->Depth = worldpos.z;
+    }
+    scene.ForwardJobs.sort(Renderer::DepthSort);
+}