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e07a0a2b1a7bdebea3291477dede0293aa5d46e6
fishtanks/src/Renderer.cpp
T
Jace e07a0a2b1a More viewport stuff
2014-05-19 04:29:30 +02:00

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#include "PrecompiledHeader.h"
#include "Renderer.h"
Renderer::Renderer()
{
m_VSync = false;
#ifdef DEBUG
m_DrawNormals = false;
m_DrawWireframe = false;
m_DrawBounds = true;
#else
m_DrawNormals = false;
m_DrawWireframe = false;
m_DrawBounds = false;
#endif
Gamma = 2.2f;
CAtt = 1.0f;
LAtt = 0.0f;
QAtt = 3.0f;
m_ShadowMapRes = 2048*6;
m_SunPosition = glm::vec3(0, 3.5f, 10);
m_SunTarget = glm::vec3(0, 0, 0);
m_SunProjection = glm::ortho<float>(10.f, -10.f, 10.f, -10.f, 10.f, -10.f);
/* Lights = 0;*/
}
void Renderer::Initialize()
{
// Initialize GLFW
if (!glfwInit())
{
LOG_ERROR("GLFW: Initialization failed");
exit(EXIT_FAILURE);
}
// Create a window
m_Width = 1280;
m_Height = 720;
// Antialiasing
//glfwWindowHint(GLFW_SAMPLES, 16);
m_Window = glfwCreateWindow(m_Width, m_Height, "OpenGL", nullptr, nullptr);
if (!m_Window)
{
LOG_ERROR("GLFW: Failed to create window");
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(m_Window);
// GL version info
glGetIntegerv(GL_MAJOR_VERSION, &m_glVersion[0]);
glGetIntegerv(GL_MINOR_VERSION, &m_glVersion[1]);
m_glVendor = (GLchar*)glGetString(GL_VENDOR);
std::stringstream ss;
ss << m_glVendor << " OpenGL " << m_glVersion[0] << "." << m_glVersion[1];
#ifdef DEBUG
ss << " DEBUG";
#endif
LOG_INFO(ss.str().c_str());
glfwSetWindowTitle(m_Window, ss.str().c_str());
// Initialize GLEW
if (glewInit() != GLEW_OK)
{
LOG_ERROR("GLEW: Initialization failed");
exit(EXIT_FAILURE);
}
// Create Camera
m_Camera = std::make_shared<Camera>(45.f, (float)m_Width / m_Height, 0.01f, 1000.f);
m_Camera->Position(glm::vec3(0.0f, 0.0f, 2.f));
glfwSwapInterval(m_VSync);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glEnable(GL_DEPTH_TEST);
LoadContent();
}
void Renderer::LoadContent()
{
/*auto standardVS = std::shared_ptr<Shader>(new VertexShader("Shaders/Vertex.glsl"));
auto standardFS = std::shared_ptr<Shader>(new FragmentShader("Shaders/Fragment.glsl"));
m_ShaderProgram.AddShader(standardVS);
m_ShaderProgram.AddShader(standardFS);
m_ShaderProgram.Compile();
m_ShaderProgram.Link();
m_ShaderProgramNormals.AddShader(std::shared_ptr<Shader>(new GeometryShader("Shaders/Normals.geo.glsl")));
m_ShaderProgramNormals.AddShader(standardVS);
m_ShaderProgramNormals.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Normals.frag.glsl")));
m_ShaderProgramNormals.Compile();
m_ShaderProgramNormals.Link();
m_ShaderProgramShadowsDrawDepth.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/VisualizeDepth.vert.glsl")));
m_ShaderProgramShadowsDrawDepth.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/VisualizeDepth.frag.glsl")));
m_ShaderProgramShadowsDrawDepth.Compile();
m_ShaderProgramShadowsDrawDepth.Link();
m_ShaderProgramDebugAABB.AddShader(standardVS);
m_ShaderProgramDebugAABB.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/AABB.frag.glsl")));
m_ShaderProgramDebugAABB.Compile();
m_ShaderProgramDebugAABB.Link();
m_ShaderProgramSkybox.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Skybox.vert.glsl")));
m_ShaderProgramSkybox.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Skybox.frag.glsl")));
m_ShaderProgramSkybox.Compile();
m_ShaderProgramSkybox.Link();*/
m_ShaderProgramShadows.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/ShadowMap.vert.glsl")));
m_ShaderProgramShadows.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/ShadowMap.frag.glsl")));
m_ShaderProgramShadows.Compile();
m_ShaderProgramShadows.Link();
m_FirstPassProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Vertex.glsl")));
m_FirstPassProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Fragment.glsl")));
m_FirstPassProgram.Compile();
glBindFragDataLocation(m_FirstPassProgram.GetHandle(), 0, "frag_Diffuse");
glBindFragDataLocation(m_FirstPassProgram.GetHandle(), 1, "frag_Position");
glBindFragDataLocation(m_FirstPassProgram.GetHandle(), 2, "frag_Normal");
m_FirstPassProgram.Link();
m_SecondPassProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Vertex2.glsl")));
m_SecondPassProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Fragment2.glsl")));
m_SecondPassProgram.Compile();
m_SecondPassProgram.Link();
m_SecondPassProgram_Debug.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Vertex2.glsl")));
m_SecondPassProgram_Debug.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Fragment2-Debug.glsl")));
m_SecondPassProgram_Debug.Compile();
m_SecondPassProgram_Debug.Link();
m_FinalPassProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/FinalPass.vert.glsl")));
m_FinalPassProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/FinalPass.frag.glsl")));
m_FinalPassProgram.Compile();
m_FinalPassProgram.Link();
m_ScreenQuad = CreateQuad();
CreateShadowMap(m_ShadowMapRes);
FrameBufferTextures();
}
void Renderer::Draw(double dt)
{
if(glfwGetKey(m_Window, GLFW_KEY_F1))
{
m_QuadView = false;
}
if(glfwGetKey(m_Window, GLFW_KEY_F2))
{
m_QuadView = true;
}
if(glfwGetKey(m_Window, GLFW_KEY_KP_1))
{
Gamma -= 0.3f * dt;
LOG_INFO("Gamma_UP: %f", Gamma);
}
if(glfwGetKey(m_Window, GLFW_KEY_KP_4))
{
Gamma += 0.3f * dt;
LOG_INFO("Gamma_DOWN: %f", Gamma);
}
if(glfwGetKey(m_Window, GLFW_KEY_1))
{
if(glfwGetKey(m_Window, GLFW_KEY_KP_ADD))
{
CAtt += 0.5f * dt;
LOG_INFO("Const: %f", CAtt);
}
if(glfwGetKey(m_Window, GLFW_KEY_KP_SUBTRACT))
{
CAtt -= 0.5f * dt;
LOG_INFO("Const: %f", CAtt);
}
}
if(glfwGetKey(m_Window, GLFW_KEY_2))
{
if(glfwGetKey(m_Window, GLFW_KEY_KP_ADD))
{
LAtt += 0.5f * dt;
LOG_INFO("Linear: %f", LAtt);
}
if(glfwGetKey(m_Window, GLFW_KEY_KP_SUBTRACT))
{
LAtt -= 0.5f * dt;
LOG_INFO("Linear: %f", LAtt);
}
}
if(glfwGetKey(m_Window, GLFW_KEY_3))
{
if(glfwGetKey(m_Window, GLFW_KEY_KP_ADD))
{
QAtt += 0.5f * dt;
LOG_INFO("Quadratic: %f", QAtt);
}
if(glfwGetKey(m_Window, GLFW_KEY_KP_SUBTRACT))
{
QAtt -= 0.5f * dt;
LOG_INFO("Quadratic: %f", QAtt);
}
}
glDisable(GL_BLEND);
DrawFBO();
ClearStuff();
glfwSwapBuffers(m_Window);
}
#pragma region TempRegion
void Renderer::DrawSkybox()
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glViewport(0, 0, m_Width, m_Height);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_ShaderProgramSkybox.Bind();
glm::mat4 cameraMatrix = m_Camera->ProjectionMatrix() * glm::toMat4(glm::inverse(m_Camera->Orientation()));
glUniformMatrix4fv(glGetUniformLocation(m_ShaderProgramSkybox.GetHandle(), "MVP"), 1, GL_FALSE, glm::value_ptr(cameraMatrix));
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
m_Skybox->Draw();
}
void Renderer::CreateShadowMap(int resolution)
{
glGenFramebuffers(1, &m_ShadowFrameBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, m_ShadowFrameBuffer);
// Depth texture
glGenTextures(1, &m_ShadowDepthTexture);
glBindTexture(GL_TEXTURE_2D, m_ShadowDepthTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT16, resolution, resolution, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
//glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE );
//glTexParameteri( GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY );
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, m_ShadowDepthTexture, 0);
glDrawBuffer(GL_NONE);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
LOG_ERROR("Framebuffer incomplete!");
return;
}
}
void Renderer::DrawShadowMap()
{
glEnable(GL_DEPTH_TEST);//Tests where objects are and display them correctly
glEnable(GL_CULL_FACE); //removes triangles on the wrong side of the object
glCullFace(GL_BACK); //Make it so that only the back faces are rendered
//Binds the FBO and sets the veiwport, witch in effect is how large the shadowmap is and what resolution it has.
glBindFramebuffer(GL_FRAMEBUFFER, m_ShadowFrameBuffer);
glViewport(0, 0, m_ShadowMapRes, m_ShadowMapRes);
glClear(GL_DEPTH_BUFFER_BIT);
//glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
//Creates the "camera" for the shadowmap from the direction of the sun.
glm::mat4 depthViewMatrix = glm::lookAt(m_SunPosition, m_SunTarget, glm::vec3(0, 1, 0));
glm::mat4 depthCamera = m_SunProjection * depthViewMatrix;
glm::mat4 MVP;
m_ShaderProgramShadows.Bind();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); //Draws filled polygons
//For each model, render them to the shadowmap
for (auto tuple : ModelsToRender)
{
Model* model;
glm::mat4 modelMatrix;
bool shadow;
std::tie(model, modelMatrix, std::ignore, shadow) = tuple;
if (!shadow)
continue;
MVP = depthCamera * modelMatrix;
glUniformMatrix4fv(glGetUniformLocation(m_ShaderProgramShadows.GetHandle(), "MVP"), 1, GL_FALSE, glm::value_ptr(MVP));
glBindVertexArray(model->VAO);
for (auto texGroup : model->TextureGroups)
{
glDrawArrays(GL_TRIANGLES, texGroup.StartIndex, texGroup.EndIndex - texGroup.StartIndex + 1);
}
}
}
void Renderer::DrawDebugShadowMap()
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glViewport(0, 0, 400, 400);
glClear(GL_DEPTH_BUFFER_BIT);
//glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
m_ShaderProgramShadowsDrawDepth.Bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_ShadowDepthTexture);
glBindVertexArray(m_ScreenQuad);
glDrawArrays(GL_TRIANGLES, 0, 6);
}
void Renderer::DrawModels(ShaderProgram &shader)
{
/*glm::mat4 cameraMatrix = m_Camera->ProjectionMatrix() * m_Camera->ViewMatrix();
glm::mat4 MVP;
for (auto tuple : ModelsToRender)
{
Model* model;
glm::mat4 modelMatrix;
std::tie(model, modelMatrix) = tuple;
MVP = cameraMatrix * modelMatrix;
glUniformMatrix4fv(glGetUniformLocation(shader.GetHandle(), "MVP"), 1, GL_FALSE, glm::value_ptr(MVP));
glUniformMatrix4fv(glGetUniformLocation(shader.GetHandle(), "model"), 1, GL_FALSE, glm::value_ptr(modelMatrix));
glUniformMatrix4fv(glGetUniformLocation(shader.GetHandle(), "view"), 1, GL_FALSE, glm::value_ptr(m_Camera->ViewMatrix()));
glBindVertexArray(model->VAO);
for (auto texGroup : model->TextureGroups) {
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texGroup.Texture->texture);
glDrawArrays(GL_TRIANGLES, texGroup.StartIndex, texGroup.EndIndex - texGroup.StartIndex + 1);
}
}*/
}
void Renderer::DrawText()
{
//DrawShitInTextForm
}
void Renderer::AddTextToDraw()
{
//Add to draw shit vector
}
void Renderer::AddModelToDraw(Model* model, glm::vec3 position, glm::quat orientation, glm::vec3 scale, bool visible, bool shadowCaster)
{
glm::mat4 modelMatrix = glm::translate(glm::mat4(), position) * glm::toMat4(orientation) * glm::scale(scale);
// You can now use ModelMatrix to build the MVP matrix
ModelsToRender.push_back(std::make_tuple(model, modelMatrix, visible, shadowCaster));
}
void Renderer::AddTextureToDraw(Texture* texture, glm::vec3 position, glm::quat orientation, glm::vec3 scale)
{
glm::mat4 modelMatrix = glm::translate(glm::mat4(), position) * glm::toMat4(orientation) * glm::scale(scale);
glm::vec3 camToParticle = glm::normalize(m_Camera->Position() - position);
glm::vec3 up = glm::vec3(0,1,0);
glm::vec3 rightVec = glm::normalize(glm::cross(up, camToParticle));
glm::vec3 up2 = glm::normalize(glm::cross(camToParticle, rightVec));
glm::mat4 billboardMatrix;
billboardMatrix[0] = glm::vec4(rightVec, 0);
billboardMatrix[1] = glm::vec4(up2, 0);
billboardMatrix[2] = glm::vec4(camToParticle, 0);
//billboardMatrix[3] = glm::vec4(position, 0);
TexturesToRender.push_back(std::make_tuple(texture, modelMatrix, billboardMatrix));
}
void Renderer::AddPointLightToDraw(
glm::vec3 _position,
glm::vec3 _specular,
glm::vec3 _diffuse,
float _specularExponent,
float _ConstantAttenuation,
float _LinearAttenuation,
float _QuadraticAttenuation
)
{
Light light;
light.Position = _position;
light.Diffuse = _diffuse;
light.Specular = _specular;
light.SpecularExponent = _specularExponent;
light.ConstantAttenuation = _ConstantAttenuation;
light.LinearAttenuation = _LinearAttenuation;
light.QuadraticAttenuation = _QuadraticAttenuation;
light.SphereModelMatrix = CreateLightMatrix(light);
Lights.push_back(light);
}
void Renderer::AddAABBToDraw(glm::vec3 origin, glm::vec3 volumeVector, bool colliding)
{
glm::mat4 model;
model *= glm::translate(origin);
model *= glm::scale(volumeVector);
AABBsToRender.push_back(std::make_tuple(model, colliding));
}
GLuint Renderer::CreateQuad()
{
float quadVertices[] =
{
-1.0f, -1.0f, 0.0f,
1.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 0.0f,
1.0f, -1.0f, 0.0f,
1.0f, 1.0f, 0.0f,
};
float quadTexCoords[] =
{
0.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
};
GLuint vbo[2], vao;
glGenBuffers(2, vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo[0]);
glBufferData(GL_ARRAY_BUFFER, 3 * 6 * sizeof(float), quadVertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, vbo[1]);
glBufferData(GL_ARRAY_BUFFER, 2 * 6 * sizeof(float), quadTexCoords, GL_STATIC_DRAW);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, vbo[0]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, vbo[1]);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(2);
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
return vao;
}
GLuint Renderer::CreateAABB()
{
float vertices[] =
{
// Bottom
-1.0f, -1.0f, 1.0f, // 0
1.0f, -1.0f, 1.0f, // 1
1.0f, -1.0f, 1.0f, // 1
1.0f, -1.0f, -1.0f, // 2
1.0f, -1.0f, -1.0f, // 2
-1.0f, -1.0f, -1.0f, // 3
-1.0f, -1.0f, -1.0f, // 3
-1.0f, -1.0f, 1.0f, // 0
// Top
-1.0f, 1.0f, 1.0f, // 4
1.0f, 1.0f, 1.0f, // 5
1.0f, 1.0f, 1.0f, // 5
1.0f, 1.0f, -1.0f, // 6
1.0f, 1.0f, -1.0f, // 6
-1.0f, 1.0f, -1.0f, // 7
-1.0f, 1.0f, -1.0f, // 7
-1.0f, 1.0f, 1.0f, // 4
// Connectors
-1.0f, -1.0f, 1.0f, // 0
-1.0f, 1.0f, 1.0f, // 4
1.0f, -1.0f, 1.0f, // 1
1.0f, 1.0f, 1.0f, // 5
1.0f, -1.0f, -1.0f, // 2
1.0f, 1.0f, -1.0f, // 6
-1.0f, -1.0f, -1.0f, // 3
-1.0f, 1.0f, -1.0f, // 7
};
GLuint vbo, vao;
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(0);
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
return vao;
}
GLuint Renderer::CreateSkybox()
{
glm::vec3 skyBoxVertices[] =
{
glm::vec3( 1.0f, -1.0f, -1.0f), glm::vec3( 1.0f, -1.0f, 1.0f), glm::vec3( 1.0f, 1.0f, 1.0f), glm::vec3( 1.0f, 1.0f, 1.0f), glm::vec3( 1.0f, 1.0f, -1.0f), glm::vec3( 1.0f, -1.0f, -1.0f),
glm::vec3(-1.0f, -1.0f, 1.0f), glm::vec3(-1.0f, -1.0f, -1.0f), glm::vec3(-1.0f, 1.0f, -1.0f), glm::vec3(-1.0f, 1.0f, -1.0f), glm::vec3(-1.0f, 1.0f, 1.0f), glm::vec3(-1.0f, -1.0f, 1.0f),
glm::vec3(-1.0f, 1.0f, -1.0f), glm::vec3( 1.0f, 1.0f, -1.0f), glm::vec3( 1.0f, 1.0f, 1.0f), glm::vec3( 1.0f, 1.0f, 1.0f), glm::vec3(-1.0f, 1.0f, 1.0f), glm::vec3(-1.0f, 1.0f, -1.0f),
glm::vec3(-1.0f, -1.0f, 1.0f), glm::vec3( 1.0f, -1.0f, 1.0f), glm::vec3( 1.0f, -1.0f, -1.0f), glm::vec3( 1.0f, -1.0f, -1.0f), glm::vec3(-1.0f, -1.0f, -1.0f), glm::vec3(-1.0f, -1.0f, 1.0f),
glm::vec3( 1.0f, -1.0f, 1.0f), glm::vec3(-1.0f, -1.0f, 1.0f), glm::vec3(-1.0f, 1.0f, 1.0f), glm::vec3(-1.0f, 1.0f, 1.0f), glm::vec3( 1.0f, 1.0f, 1.0f), glm::vec3( 1.0f, -1.0f, 1.0f),
glm::vec3(-1.0f, -1.0f, -1.0f), glm::vec3( 1.0f, -1.0f, -1.0f), glm::vec3( 1.0f, 1.0f, -1.0f), glm::vec3( 1.0f, 1.0f, -1.0f), glm::vec3(-1.0f, 1.0f, -1.0f), glm::vec3(-1.0f, -1.0f, -1.0f)
};
GLuint vbo, vao;
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(skyBoxVertices), skyBoxVertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
glEnableVertexAttribArray(0);
glBindVertexArray(0);
return vao;
}
void Renderer::ClearStuff()
{
AABBsToRender.clear();
ModelsToRender.clear();
TexturesToRender.clear();
Lights.clear();
}
#pragma endregion
void Renderer::FrameBufferTextures()
{
m_fbBasePass = 0;
m_fDepthBuffer = 0;
glGenFramebuffers(1, &m_fbBasePass);
glGenRenderbuffers(1, &m_fDepthBuffer);
glBindRenderbuffer(GL_RENDERBUFFER, m_fDepthBuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, m_Width, m_Height);
//Generate and bind diffuse texture
glGenTextures(1, &m_fDiffuseTexture);
glBindTexture(GL_TEXTURE_2D, m_fDiffuseTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Generate and bind position texture
glGenTextures(1, &m_fPositionTexture);
glBindTexture(GL_TEXTURE_2D, m_fPositionTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Generate and bind normal texture
glGenTextures(1, &m_fNormalsTexture);
glBindTexture(GL_TEXTURE_2D, m_fNormalsTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Generate and bind normal texture
glGenTextures(1, &m_fSpecularTexture);
glBindTexture(GL_TEXTURE_2D, m_fSpecularTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
/*glGenTextures(1, &m_fShadowTexture);
glBindTexture(GL_TEXTURE_2D, m_fShadowTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);*/
//Bind fb
glBindFramebuffer(GL_FRAMEBUFFER, m_fbBasePass);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_fDepthBuffer);
//Attach textures to the FB
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_fDiffuseTexture, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, m_fPositionTexture, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, m_fNormalsTexture, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, m_fSpecularTexture, 0);
//glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, m_fShadowTexture, 0);
GLenum fbStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(fbStatus != GL_FRAMEBUFFER_COMPLETE)
{
LOG_ERROR("DeferredLighting:Init: m_fbBasePass incomplete: 0x%x\n", fbStatus);
//exit(1);
}
m_fbLightingPass = 0;
glGenFramebuffers(1, &m_fbLightingPass);
glGenTextures(1, &m_fLightingTexture);
glBindTexture(GL_TEXTURE_2D, m_fLightingTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindFramebuffer(GL_FRAMEBUFFER, m_fbLightingPass);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_fLightingTexture, 0);
fbStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(fbStatus != GL_FRAMEBUFFER_COMPLETE)
{
LOG_ERROR("DeferredLighting:Init: m_fbLightingPass incomplete: 0x%x\n", fbStatus);
//exit(1);
}
}
void Renderer::DrawFBO()
{
DrawShadowMap();
/*
Base pass
*/
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_fbBasePass);
// Clear G-buffer
GLenum windowBuffClear[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
glDrawBuffers(3, windowBuffClear);
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Execute the first render stage which will fill out the internal buffers with data(??)
m_FirstPassProgram.Bind();
GLenum windowBuffOpaque[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
glDrawBuffers(3, windowBuffOpaque);
glCullFace(GL_BACK);
glViewport(0, 0, m_Width, m_Height);
DrawFBOScene();
/*
Lighting pass
*/
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_fbLightingPass);
GLenum lightingPassAttachments[] = { GL_COLOR_ATTACHMENT0 };
glDrawBuffers(1, lightingPassAttachments);
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
m_SecondPassProgram.Bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_fPositionTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_fNormalsTexture);
glCullFace(GL_FRONT);
DrawLightScene();
/*
Final pass
*/
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_FinalPassProgram.Bind();
// Ambient light
glUniform3fv(glGetUniformLocation(m_FinalPassProgram.GetHandle(), "La"), 1, glm::value_ptr(glm::vec3(0.1f, 0.1f, 0.1f)));
glUniform1f(glGetUniformLocation(m_FinalPassProgram.GetHandle(), "Gamma"), Gamma);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_fDiffuseTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_fLightingTexture);
glCullFace(GL_BACK);
glBindVertexArray(m_ScreenQuad);
glEnableVertexAttribArray(0);
glDrawArrays(GL_TRIANGLES, 0, 6);
}
void Renderer::DrawFBOScene()
{
// glEnable(GL_DEPTH_TEST);//Tests where objects are and display them correctly
// glEnable(GL_CULL_FACE); //removes triangles on the wrong side of the object
// glCullFace(GL_BACK); //Make it so that only the back faces are rendered
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); //Draws filled polygons
glm::mat4 cameraMatrix = m_Camera->ProjectionMatrix() * m_Camera->ViewMatrix();
glm::mat4 MVP;
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
);
glm::mat4 depthViewMatrix = glm::lookAt(m_SunPosition, m_SunTarget, glm::vec3(0, 1, 0));
glm::mat4 depthCamera = m_SunProjection * depthViewMatrix;
glm::mat4 depthCameraMatrix = biasMatrix * depthCamera;
glm::mat4 depthMVP;
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_ShadowDepthTexture);
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(), "MVP"), 1, GL_FALSE, glm::value_ptr(MVP));
glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "DepthMVP"), 1, GL_FALSE, glm::value_ptr(depthMVP));
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);
if (texGroup.NormalMap)
{
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, *texGroup.NormalMap);
}
glDrawArrays(GL_TRIANGLES, texGroup.StartIndex, texGroup.EndIndex - texGroup.StartIndex + 1);
}
}
for (auto tuple : TexturesToRender)
{
Texture* texture;
glm::mat4 modelMatrix;
glm::mat4 billboardMatrix;
std::tie(texture, modelMatrix, billboardMatrix) = tuple;
//MVP = cameraMatrix * glm::inverse(glm::toMat4(m_Camera->Orientation()) * modelMatrix );
MVP = cameraMatrix * modelMatrix * billboardMatrix;
depthMVP = depthCameraMatrix * modelMatrix;
glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "MVP"), 1, GL_FALSE, glm::value_ptr(MVP));
glUniformMatrix4fv(glGetUniformLocation(m_FirstPassProgram.GetHandle(), "DepthMVP"), 1, GL_FALSE, glm::value_ptr(depthMVP));
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()));
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, *texture);
glBindVertexArray(m_ScreenQuad);
glDrawArrays(GL_TRIANGLES, 0, 6);
}
}
void Renderer::DrawLightScene()
{
glEnable(GL_BLEND);
glBlendEquation (GL_FUNC_ADD);
glBlendFunc(GL_ONE,GL_ONE);
glDisable (GL_DEPTH_TEST);
glDepthMask (GL_FALSE);
glBindVertexArray(m_sphereModel->VAO);
glm::mat4 cameraMatrix = m_Camera->ProjectionMatrix() * m_Camera->ViewMatrix();
glm::mat4 MVP;
for (auto &light : Lights)
{
MVP = cameraMatrix * light.SphereModelMatrix;
glUniform2fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ViewportSize"), 1,glm::value_ptr(glm::vec2(m_Width, m_Height)));
glUniformMatrix4fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "MVP"), 1, GL_FALSE, glm::value_ptr(MVP));
glUniformMatrix4fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "V"), 1, GL_FALSE, glm::value_ptr(m_Camera->ViewMatrix()));
glUniformMatrix4fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "P"), 1, GL_FALSE, glm::value_ptr(m_Camera->ProjectionMatrix()));
glUniformMatrix4fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "M"), 1, GL_FALSE, glm::value_ptr(light.SphereModelMatrix));
glUniform3fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ls"), 1, glm::value_ptr(light.Specular));
glUniform3fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ld"), 1, glm::value_ptr(light.Diffuse));
glUniform3fv(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "lp"), 1, glm::value_ptr(light.Position));
glUniform3f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "CameraPosition"), m_Camera->Position().x, m_Camera->Position().y, m_Camera->Position().z);
glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "specularExponent"), light.SpecularExponent);
// glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ConstantAttenuation"), light.ConstantAttenuation);
// glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "LinearAttenuation"), light.LinearAttenuation);
// glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "QuadraticAttenuation"), light.QuadraticAttenuation);
glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "ConstantAttenuation"), CAtt);
glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "LinearAttenuation"), LAtt);
glUniform1f(glGetUniformLocation(m_SecondPassProgram.GetHandle(), "QuadraticAttenuation"), QAtt);
glDrawArrays(GL_TRIANGLES, 0, m_sphereModel->Vertices.size());
};
glEnable (GL_DEPTH_TEST);
glDepthMask (GL_TRUE);
glDisable (GL_BLEND);
}
void Renderer::SetSphereModel( Model* _model )
{
m_sphereModel = _model;
}
glm::mat4 Renderer::CreateLightMatrix(Light &_light)
{
// float c = _light.ConstantAttenuation;
// float l = _light.LinearAttenuation;
// float q = _light.QuadraticAttenuation;
float c = CAtt;
float l = LAtt;
float q = QAtt;
float cutOffRadius = abs(sqrt((-4*c*q) + pow(l, 2) + (1024*q) - l) / (2*q));
glm::mat4 model;
model *= glm::translate(_light.Position);
model *= glm::scale(glm::vec3(cutOffRadius));
return model;
}
void Renderer::UpdateSunProjection()
{
glm::vec3 NDCCube[] =
{
glm::vec3(-1.f, -1.f, -1.f),
glm::vec3(1.f, -1.f, -1.f),
glm::vec3(-1.f, 1.f, -1.f),
glm::vec3(1.f, 1.f, -1.f),
glm::vec3(-1.f, -1.f, 1.f),
glm::vec3(1.f, -1.f, 1.f),
glm::vec3(-1.f, 1.f, 1.f),
glm::vec3(1.f, 1.f, 1.f)
};
glm::mat4 inverseProjectionViewMatrix = glm::inverse(m_Camera->ViewMatrix()) * glm::inverse(m_Camera->ProjectionMatrix());
//Also * with world matrix for light
for(auto corner : NDCCube)
{
//corner *= inverseProjectionViewMatrix;
}
//Calculate the bounding box of the transformed frustum corners. This will be the view frustum for the shadow map.
//Pass the bounding box's extents to glOrtho or similar to set up the orthographic projection matrix for the shadow map.
}
void Renderer::CreateViewport(int identifier, float left, float top, float right, float bottom)
{
Viewport v;
v.Left = left;
v.Top = top;
v.Right = right;
v.Bottom = bottom;
m_Viewports[identifier] = v;
}
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