Started on deferred rendering framework.

src/Renderer.cpp

@@ -72,6 +72,8 @@ void Renderer::Initialize()
 	glEnable(GL_DEPTH_TEST);
 
 	LoadContent();
+
+	FrameBufferTextures();
 }
 
 void Renderer::LoadContent()
@@ -110,6 +112,11 @@ void Renderer::LoadContent()
 	m_ShaderProgramSkybox.Compile();
 	m_ShaderProgramSkybox.Link();
 
+	m_FirstPassProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/First_pass.vert.glsl")));
+	m_FirstPassProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/First_pass.frag.glsl")));
+	m_FirstPassProgram.Compile();
+	m_FirstPassProgram.Link();
+
 	m_Skybox = std::make_shared<Skybox>("Textures/Skybox/Sunset", "jpg");
 
 	m_DebugAABB = CreateAABB();
@@ -147,43 +154,17 @@ void Renderer::Draw(double dt)
 {
 	glDisable(GL_BLEND);
 
-	DrawSkybox();
-	DrawShadowMap();
-	DrawScene();
-
-#ifdef DEBUG
-	// Draw bounding boxes
-	if (m_DrawBounds)
-	{
-		glEnable(GL_BLEND);
-		glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO);
-		m_ShaderProgramDebugAABB.Bind();
-		for (auto tuple : AABBsToRender)
-		{
-			glm::mat4 modelMatrix;
-			bool colliding;
-			std::tie(modelMatrix, colliding) = tuple;
-			// Model matrix
-			glm::mat4 cameraMatrix = m_Camera->ProjectionMatrix() * m_Camera->ViewMatrix();
-			glm::mat4 MVP = cameraMatrix * modelMatrix;
-			glUniformMatrix4fv(glGetUniformLocation(m_ShaderProgramDebugAABB.GetHandle(), "MVP"), 1, GL_FALSE, glm::value_ptr(MVP));
-			// Color
-			glm::vec4 color(1.f, 1.f, 1.f, 0.f);
-			if (colliding)
-				color = glm::vec4(1.f, 0.f, 0.f, 0.f);
-			glUniform4fv(glGetUniformLocation(m_ShaderProgramDebugAABB.GetHandle(), "Color"), 1, glm::value_ptr(color));
-			glBindVertexArray(m_DebugAABB);
-			glDrawArrays(GL_LINES, 0, 24);
-		}
-	}
-
-	DrawDebugShadowMap();
-#endif
+	DrawFBO();
 
 	ClearStuff();
 	glfwSwapBuffers(m_Window);
 }
 
+#pragma region TempRegion
+
+
+
+
 void Renderer::DrawSkybox()
 {
 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
@@ -199,8 +180,8 @@ void Renderer::DrawSkybox()
 
 void Renderer::DrawScene()
 {
-	glBindFramebuffer(GL_FRAMEBUFFER, 0);
-	glViewport(0, 0, WIDTH, HEIGHT);
+// 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+// 	glViewport(0, 0, WIDTH, HEIGHT);
 
 	glClear(GL_DEPTH_BUFFER_BIT);
 	//glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
@@ -537,6 +518,7 @@ GLuint Renderer::CreateSkybox()
 
 	return vao;
 }
+
 void Renderer::ClearStuff()
 {
 	AABBsToRender.clear();
@@ -549,4 +531,144 @@ void Renderer::ClearStuff()
 	Light_quadraticAttenuation.clear();
 	Light_spotExponent.clear();
 	Lights = 0;
-}
+}
+
+#pragma endregion
+
+void Renderer::FrameBufferTextures()
+{
+	m_fb = 0;
+	
+	glGenFramebuffers(1, &m_fb);
+	GLERROR("GLERROR: Failed to generate frame buffer");
+	glGenTextures(1, &m_fb_PositionTexture);
+	GLERROR("GLERROR: Failed to generate Position texture");
+	glBindTexture(GL_TEXTURE_2D, m_fb_PositionTexture);
+	GLERROR("GLERROR: Failed to bind Position texture");
+	glTexImage2D(
+		GL_TEXTURE_2D,
+		0,
+		GL_RGB16F,
+		WIDTH,
+		HEIGHT,
+		0,
+		GL_RGBA,
+		GL_UNSIGNED_BYTE,
+		NULL
+		);
+	GLERROR("GLERROR: Failed to generate Position texture image");
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	GLERROR("GLERROR: Failed to generate Position Parameters");
+
+	glGenTextures(1, &m_fb_NormalsTexture);
+	GLERROR("GLERROR: Failed to generate Normal texture");
+	glBindTexture(GL_TEXTURE_2D, m_fb_NormalsTexture);
+	GLERROR("GLERROR: Failed to bind Normal texture");
+	glTexImage2D(
+		GL_TEXTURE_2D,
+		0,
+		GL_RGB16F,
+		WIDTH,
+		HEIGHT,
+		0,
+		GL_RGBA,
+		GL_UNSIGNED_BYTE,
+		NULL
+		);
+	GLERROR("GLERROR: Failed to generate Normal texture image");
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	GLERROR("GLERROR: Failed to generate Normals Parameters");
+
+	glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
+	GLERROR("GLERROR: Failed to bind framebuffer");
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_fb_PositionTexture, 0);
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, m_fb_NormalsTexture, 0);
+	GLERROR("GLERROR: Failed to FrameBufferTexture2D");
+
+	m_rb = 0;
+	glGenRenderbuffers(1, &m_rb);
+	GLERROR("GLERROR: Failed to generate RenderBuffer");
+	glBindRenderbuffer(GL_RENDERBUFFER, m_rb);
+	GLERROR("GLERROR: Failed to bind RenderBuffer");
+	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, WIDTH, HEIGHT);
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_rb);
+	
+	draw_bufs[1] = GL_COLOR_ATTACHMENT0;
+	draw_bufs[2] = GL_COLOR_ATTACHMENT1;
+	
+
+}
+
+void Renderer::DrawFBO()
+{
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
+	glEnable(GL_DEPTH_TEST);
+	glEnable(GL_CULL_FACE);
+	glCullFace(GL_BACK);
+#ifdef DEBUG
+	glDisable(GL_CULL_FACE);
+	glPolygonMode(GL_BACK, GL_LINE);
+#endif
+
+	// Draw models
+	glm::mat4 depthViewMatrix = glm::lookAt(m_SunPosition, m_SunTarget, glm::vec3(0, 1, 0)) * glm::translate(-m_Camera->Position() * glm::vec3(1, 0, 0));
+	glm::mat4 depthCamera = m_SunProjection * depthViewMatrix;
+	glm::mat4 biasMatrix(
+		0.5, 0.0, 0.0, 0.0,
+		0.0, 0.5, 0.0, 0.0,
+		0.0, 0.0, 0.5, 0.0,
+		0.5, 0.5, 0.5, 1.0
+		);
+
+	m_ShaderProgram.Bind();
+	if (m_DrawWireframe)
+	{
+		glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	}
+	glm::mat4 cameraMatrix = m_Camera->ProjectionMatrix() * m_Camera->ViewMatrix();
+	glm::mat4 depthCameraMatrix = biasMatrix * depthCamera;
+	glm::mat4 MVP;
+	glm::mat4 depthMVP;
+	for (auto tuple : ModelsToRender)
+	{
+		Model* model;
+		glm::mat4 modelMatrix;
+		bool visible;
+		std::tie(model, modelMatrix, visible, std::ignore) = tuple;
+		if (!visible)
+			continue;
+
+		MVP = cameraMatrix * modelMatrix;
+		depthMVP = depthCameraMatrix * modelMatrix;
+		glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "M"), 1, GL_FALSE, glm::value_ptr(modelMatrix));
+		glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "V"), 1, GL_FALSE, glm::value_ptr( m_Camera->ViewMatrix()));
+		glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "P"), 1, GL_FALSE, glm::value_ptr(m_Camera->ProjectionMatrix()));
+		glBindVertexArray(model->VAO);
+// 		for (auto texGroup : model->TextureGroups)
+// 		{
+// 			glActiveTexture(GL_TEXTURE0);
+// 			glBindTexture(GL_TEXTURE_2D, *texGroup.Texture);
+// 			glDrawArrays(GL_TRIANGLES, texGroup.StartIndex, texGroup.EndIndex - texGroup.StartIndex + 1);
+// 		}
+	}
+
+#ifdef DEBUG
+	// Debug draw model normals
+	if (m_DrawNormals)
+	{
+		m_ShaderProgramNormals.Bind();
+		glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+		DrawModels(m_ShaderProgramNormals);
+	}
+#endif
+
+	//glDrawBuffers(2, draw_bufs);
+}
+

src/Renderer.h

@@ -88,9 +88,16 @@ private:
 	GLuint m_ShadowFrameBuffer;
 	GLuint m_ShadowDepthTexture;
 
+	GLuint m_fb_PositionTexture;
+	GLuint m_fb_NormalsTexture;
+	GLuint m_fb;
+	GLuint m_rb;
+	GLenum draw_bufs[2];
+
 	std::shared_ptr<Camera> m_Camera;
 
 	ShaderProgram m_ShaderProgram;
+	ShaderProgram m_FirstPassProgram;
 	ShaderProgram m_ShaderProgramNormals;
 	ShaderProgram m_ShaderProgramShadows;
 	ShaderProgram m_ShaderProgramShadowsDrawDepth;
@@ -102,6 +109,9 @@ private:
 	void DrawModels(ShaderProgram &shader);
 	void DrawShadowMap();
 	void CreateShadowMap(int resolution);
+	void FrameBufferTextures();
+	void DrawFBO();
+	
 	GLuint CreateQuad();
 	void DrawDebugShadowMap();
 	GLuint CreateAABB();

src/Shaders/First_pass.frag.glsl

@@ -0,0 +1,12 @@
+#version 400
+
+in vec3 p_eye;
+in vec3 n_eye;
+
+layout (location = 0) out vec4 def_p; // "go to GL_COLOR_ATTACHMENT0"
+layout (location = 1) out vec4 def_n; // "go to GL_COLOR_ATTACHMENT1"
+
+void main () {
+  def_p = vec4(p_eye, 1.0);
+  def_n = vec4(n_eye, 1.0);
+}

src/Shaders/First_pass.vert.glsl

@@ -0,0 +1,16 @@
+#version 400
+
+layout(location = 0) in vec3 vp;
+layout(location = 1) in vec3 vn;
+layout(location = 2) in vec2 TextureCoord;
+
+uniform mat4 P, V, M;
+
+out vec3 p_eye;
+out vec3 n_eye;
+
+void main () {
+  p_eye = (V * M * vec4 (vp, 1.0)).xyz;
+  n_eye = (V * M * vec4 (vn, 0.0)).xyz;
+  gl_Position = P * vec4 (p_eye, 1.0);
+}

src/Shaders/Second_pass.frag.glsl

@@ -0,0 +1,24 @@
+#version 430
+
+uniform sampler2D tDiffuse; 
+uniform sampler2D tPosition;
+uniform sampler2D tNormals;
+uniform vec3 cameraPosition;
+
+void main( void )
+{
+	vec4 image = texture2D( tDiffuse, gl_TexCoord[0].xy );
+	vec4 position = texture2D( tPosition, gl_TexCoord[0].xy );
+	vec4 normal = texture2D( tNormals, gl_TexCoord[0].xy );
+	
+	vec3 light = vec3(50,100,50);
+	vec3 lightDir = light - position.xyz ;
+	
+	normal = normalize(normal);
+	lightDir = normalize(lightDir);
+	
+	vec3 eyeDir = normalize(cameraPosition-position.xyz);
+	vec3 vHalfVector = normalize(lightDir.xyz+eyeDir);
+	
+	gl_FragColor = max(dot(normal,lightDir),0) * image + pow(max(dot(normal,vHalfVector),0.0), 100) * 1.5;
+}

src/Shaders/Second_pass.vert.glsl

@@ -0,0 +1,9 @@
+#version 430
+
+void main( void )
+{
+	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+
+    gl_FrontColor = vec4(1.0, 1.0, 1.0, 1.0);
+}

src/Shaders/geometry_pass.frag.glsl

@@ -1,20 +0,0 @@
-#version 430
-
-in vec2 TexCoord0; 
-in vec3 Normal0; 
-in vec3 WorldPos0; 
-
-layout (location = 0) out vec3 WorldPosOut; 
-layout (location = 1) out vec3 DiffuseOut; 
-layout (location = 2) out vec3 NormalOut; 
-layout (location = 3) out vec3 TexCoordOut; 
-
-uniform sampler2D gColorMap; 
-
-void main()	
-{	
-    WorldPosOut = WorldPos0;	
-    DiffuseOut = texture(gColorMap, TexCoord0).xyz;	
-    NormalOut = normalize(Normal0);	
-    TexCoordOut = vec3(TexCoord0, 0.0);	
-}

src/Shaders/geometry_pass.vert.glsl

@@ -1,20 +0,0 @@
-#version 430
-
-layout (location = 0) in vec3 Position; 
-layout (location = 1) in vec2 TexCoord; 
-layout (location = 2) in vec3 Normal; 
-
-uniform mat4 gWVP;
-uniform mat4 gWorld;
-
-out vec2 TexCoord0; 
-out vec3 Normal0; 
-out vec3 WorldPos0; 
-
-void main()
-{ 
-    gl_Position = gWVP * vec4(Position, 1.0);
-    TexCoord0 = TexCoord; 
-    Normal0 = (gWorld * vec4(Normal, 0.0)).xyz; 
-    WorldPos0 = (gWorld * vec4(Position, 1.0)).xyz;
-}

src/Util/defferedUtil.h

@@ -0,0 +1,28 @@
+#ifndef UTIL_H
+#define	UTIL_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define ZERO_MEM(a) memset(a, 0, sizeof(a))
+
+#define ARRAY_SIZE_IN_ELEMENTS(a) (sizeof(a)/sizeof(a[0]))
+
+#define INVALID_OGL_VALUE 0xFFFFFFFF
+
+#define SAFE_DELETE(p) if (p) { delete p; p = NULL; }
+
+#define GLExitIfError()                                                          \
+{                                                                               \
+    GLenum Error = glGetError();                                                \
+                                                                                \
+    if (Error != GL_NO_ERROR) {                                                 \
+        printf("OpenGL error in %s:%d: 0x%x\n", __FILE__, __LINE__, Error);     \
+        exit(0);                                                                \
+    }                                                                           \
+}
+
+#define GLCheckError() (glGetError() == GL_NO_ERROR)
+
+#endif	/* UTIL_H */

src/gBuffer.cpp

@@ -1,40 +0,0 @@
-#include "PrecompiledHeader.h"
-#include "gBuffer.h"
-
-bool GBuffer::Init(unsigned int WindowWidth, unsigned int WindowHeight)
-{
-	// Create the FBO
-	glGenFramebuffers(1, &m_fbo); 
-	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_fbo);
-
-	// Create the gbuffer textures
-	glGenTextures(ARRAY_SIZE_IN_ELEMENTS(m_textures), m_textures);
-	glGenTextures(1, &m_depthTexture);
-
-	for (unsigned int i = 0 ; i < ARRAY_SIZE_IN_ELEMENTS(m_textures) ; i++) {
-		glBindTexture(GL_TEXTURE_2D, m_textures[i]);
-		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, WindowWidth, WindowHeight, 0, GL_RGB, GL_FLOAT, NULL);
-		glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, m_textures[i], 0);
-	}
-
-	// depth
-	glBindTexture(GL_TEXTURE_2D, m_depthTexture);
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, WindowWidth, WindowHeight, 0, GL_DEPTH_COMPONENT, GL_FLOAT,
-		NULL);
-	glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, m_depthTexture, 0);
-
-	GLenum DrawBuffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2, GL_COLOR_ATTACHMENT3 }; 
-	glDrawBuffers(ARRAY_SIZE_IN_ELEMENTS(DrawBuffers), DrawBuffers);
-
-	GLenum Status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
-
-	if (Status != GL_FRAMEBUFFER_COMPLETE) {
-		printf("FB error, status: 0x%x\n", Status);
-		return false;
-	}
-
-	// restore default FBO
-	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
-
-	return true;
-}

src/gBuffer.h

@@ -1,35 +0,0 @@
-#ifndef gBuffer_h__
-#define gBuffer_h__
-
-#include <stdio.h>
-
-class GBuffer
-{
-public:
-
-	enum GBUFFER_TEXTURE_TYPE {
-		GBUFFER_TEXTURE_TYPE_POSITION,
-		GBUFFER_TEXTURE_TYPE_DIFFUSE,
-		GBUFFER_TEXTURE_TYPE_NORMAL,
-		GBUFFER_TEXTURE_TYPE_TEXCOORD,
-		GBUFFER_NUM_TEXTURES
-	};
-
-	GBuffer();
-
-	~GBuffer();
-
-	bool Init(unsigned int WindowWidth, unsigned int WindowHeight);
-
-	void BindForWriting();
-
-	void BindForReading();
-
-private:
-
-	GLuint m_fbo;
-	GLuint m_textures[GBUFFER_NUM_TEXTURES];
-	GLuint m_depthTexture;
-};
-
-#endif //gBuffer_h__

vs11/Returngeance/Returngeance.vcxproj

@@ -156,15 +156,33 @@
     <ClInclude Include="..\..\src\Systems\SoundSystem.h" />
     <ClInclude Include="..\..\src\Systems\TransformSystem.h" />
     <ClInclude Include="..\..\src\Texture.h" />
+    <ClInclude Include="..\..\src\Util\defferedUtil.h" />
     <ClInclude Include="..\..\src\Util\GLError.h" />
     <ClInclude Include="..\..\src\Util\Logging.h" />
     <ClInclude Include="..\..\src\World.h" />
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\src\Shaders\AABB.frag.glsl" />
+    <None Include="..\..\src\Shaders\First_pass.frag.glsl">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+      </ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </None>
+    <None Include="..\..\src\Shaders\First_pass.vert.glsl">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+      </ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+      </ExcludedFromBuild>
+    </None>
     <None Include="..\..\src\Shaders\Fragment.glsl" />
     <None Include="..\..\src\Shaders\Normals.frag.glsl" />
     <None Include="..\..\src\Shaders\Normals.geo.glsl" />
+    <None Include="..\..\src\Shaders\Second_pass.frag.glsl">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </None>
+    <None Include="..\..\src\Shaders\Second_pass.vert.glsl">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </None>
     <None Include="..\..\src\Shaders\ShadowMap.frag.glsl" />
     <None Include="..\..\src\Shaders\ShadowMap.vert.glsl" />
     <None Include="..\..\src\Shaders\Skybox.frag.glsl" />

vs11/Returngeance/Returngeance.vcxproj.filters

@@ -214,6 +214,9 @@
     </ClInclude>
     <ClInclude Include="..\..\src\Components\Box.h" />
     <ClInclude Include="..\..\src\Components\Sphere.h" />
+    <ClInclude Include="..\..\src\Util\defferedUtil.h">
+      <Filter>Util</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\src\Shaders\AABB.frag.glsl">
@@ -249,5 +252,17 @@
     <None Include="..\..\src\Shaders\VisualizeDepth.vert.glsl">
       <Filter>Shaders</Filter>
     </None>
+    <None Include="..\..\src\Shaders\First_pass.frag.glsl">
+      <Filter>Shaders</Filter>
+    </None>
+    <None Include="..\..\src\Shaders\First_pass.vert.glsl">
+      <Filter>Shaders</Filter>
+    </None>
+    <None Include="..\..\src\Shaders\Second_pass.frag.glsl">
+      <Filter>Shaders</Filter>
+    </None>
+    <None Include="..\..\src\Shaders\Second_pass.vert.glsl">
+      <Filter>Shaders</Filter>
+    </None>
   </ItemGroup>
 </Project>