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a8a38716bd5ccbcd86f794be26741aece9f16996
axyz/src/Engine/Rendering/Renderer.cpp
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#include "Rendering/Renderer.h"
void Renderer::Initialize()
{
InitializeWindow();
// Create default camera
m_DefaultCamera = new ::Camera((float)m_Resolution.Width / m_Resolution.Height, glm::radians(45.f), 0.01f, 5000.f);
m_DefaultCamera->SetPosition(glm::vec3(0, 0, 10));
if (m_Camera == nullptr) {
m_Camera = m_DefaultCamera;
}
glfwSwapInterval(m_VSYNC);
InitializeShaders();
InitializeTextures();
InitializeFrameBuffers();
m_TextRenderer = new TextRenderer();
m_TextRenderer->Initialize();
m_ScreenQuad = ResourceManager::Load<Model>("Models/Core/ScreenQuad.obj");
m_UnitQuad = ResourceManager::Load<Model>("Models/Core/UnitQuad.obj");
m_UnitSphere = ResourceManager::Load<Model>("Models/Core/UnitSphere.obj");
}
void Renderer::InitializeWindow()
{
// Initialize GLFW
if (!glfwInit()) {
LOG_ERROR("GLFW: Initialization failed");
exit(EXIT_FAILURE);
}
// Create a window
GLFWmonitor* monitor = nullptr;
if (m_Fullscreen) {
monitor = glfwGetPrimaryMonitor();
}
//glfwWindowHint(GLFW_SAMPLES, 8);
m_Window = glfwCreateWindow(m_Resolution.Width, m_Resolution.Height, "daydream", monitor, 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);
}
}
void Renderer::InitializeShaders()
{
m_BasicForwardProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/BasicForward.vert.glsl")));
m_BasicForwardProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/BasicForward.frag.glsl")));
m_BasicForwardProgram.Compile();
m_BasicForwardProgram.Link();
m_PickingProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Picking.vert.glsl")));
m_PickingProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Picking.frag.glsl")));
m_PickingProgram.Compile();
m_PickingProgram.BindFragDataLocation(0, "TextureFragment");
m_PickingProgram.Link();
m_DrawScreenQuadProgram.AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/DrawScreenQuad.vert.glsl")));
m_DrawScreenQuadProgram.AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/DrawScreenQuad.frag.glsl")));
m_DrawScreenQuadProgram.Compile();
m_DrawScreenQuadProgram.Link();
}
void Renderer::InputUpdate(double dt)
{
glm::vec3 m_Position = m_Camera->Position();
if (glfwGetKey(m_Window, GLFW_KEY_O) == GLFW_PRESS)
{
m_Position = glm::vec3(0.f, 0.f, 5.f);
}
if (glfwGetKey(m_Window, GLFW_KEY_W) == GLFW_PRESS)
{
m_Position += m_Camera->Forward() * m_CameraMoveSpeed * (float)dt;
}
if (glfwGetKey(m_Window, GLFW_KEY_S) == GLFW_PRESS)
{
m_Position -= m_Camera->Forward() * m_CameraMoveSpeed * (float)dt;
}
if (glfwGetKey(m_Window, GLFW_KEY_D) == GLFW_PRESS)
{
m_Position += m_Camera->Right() * m_CameraMoveSpeed * (float)dt;
}
if (glfwGetKey(m_Window, GLFW_KEY_A) == GLFW_PRESS)
{
m_Position -= m_Camera->Right() * m_CameraMoveSpeed * (float)dt;
}
if (glfwGetKey(m_Window, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS)
{
m_CameraMoveSpeed = 5.f;
}
else {
m_CameraMoveSpeed = 0.5f;
}
static double mousePosX, mousePosY;
glfwGetCursorPos(m_Window, &mousePosX, &mousePosY);
if (glfwGetKey(m_Window, GLFW_KEY_SPACE) == GLFW_PRESS) {
double deltaX, deltaY;
deltaX = mousePosX - (float)Resolution().Width / 2;
deltaY = mousePosY - (float)Resolution().Height / 2;
float rotationY = -deltaY / 300.f;
float rotationX = -deltaX / 300.f;
glm::quat orientation = m_Camera->Orientation();
orientation = orientation * glm::angleAxis<float>(rotationY, glm::vec3(1, 0, 0));
orientation = glm::angleAxis<float>(rotationX, glm::vec3(0, 1, 0)) * orientation;
m_Camera->SetOrientation(orientation);
glfwSetCursorPos(m_Window, Resolution().Width / 2, Resolution().Height / 2);
}
m_Camera->SetPosition(m_Position);
}
void Renderer::Update(double dt)
{
m_EventBroker->Process<Renderer>();
InputUpdate(dt);
m_TextRenderer->Update();
}
void Renderer::Draw(RenderQueueCollection& rq)
{
//TODO: Renderer: Kanske borde vara längst upp i update.
PickingPass(rq);
// DrawScreenQuad(m_PickingTexture);
DrawScene(rq);
m_TextRenderer->Draw(m_Camera->ProjectionMatrix(), m_Camera->ViewMatrix());
glfwSwapBuffers(m_Window);
}
void Renderer::DrawScene(RenderQueueCollection& rq)
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//TODO: Render: Clean up draw code
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glClearColor(255.f / 255, 163.f / 255, 176.f / 255, 0.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//TODO: Render: Add code for more jobs than modeljobs.
for (auto &job : rq.Forward) {
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->ModelMatrix));
glUniformMatrix4fv(glGetUniformLocation(ShaderHandle, "V"), 1, GL_FALSE, glm::value_ptr(m_Camera->ViewMatrix()));
glUniformMatrix4fv(glGetUniformLocation(ShaderHandle, "P"), 1, GL_FALSE, glm::value_ptr(m_Camera->ProjectionMatrix()));
glUniform4fv(glGetUniformLocation(ShaderHandle, "Color"), 1, glm::value_ptr(modelJob->Color));
//TODO: Renderer: bättre textur felhantering samt fler texturer stöd
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("DrawScene Error");
}
void Renderer::PickingPass(RenderQueueCollection& rq)
{
m_PickingColorsToEntity.clear();
m_PickingBuffer.Bind();
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glClearColor(0.f, 0.f, 0.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
int r = 1;
int g = 0;
//TODO: Render: Add code for more jobs than modeljobs.
GLuint ShaderHandle = m_PickingProgram.GetHandle();
m_PickingProgram.Bind();
for (auto &job : rq.Forward) {
auto modelJob = std::dynamic_pointer_cast<ModelJob>(job);
if (modelJob) {
//---------------
//TODO: Renderer: IMPORTANT: Fixa detta så det inte loopar igenom listan varje frame.
//---------------
int pickColor[2] = { r, g };
for (auto i : m_PickingColorsToEntity) {
if(modelJob->Entity == i.second) {
pickColor[0] = i.first.x;
pickColor[1] = i.first.y;
r -= 1;
}
}
m_PickingColorsToEntity[glm::vec2(pickColor[0], pickColor[1])] = modelJob->Entity;
//Render picking stuff
//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->ModelMatrix));
glUniformMatrix4fv(glGetUniformLocation(ShaderHandle, "V"), 1, GL_FALSE, glm::value_ptr(m_Camera->ViewMatrix()));
glUniformMatrix4fv(glGetUniformLocation(ShaderHandle, "P"), 1, GL_FALSE, glm::value_ptr(m_Camera->ProjectionMatrix()));
glUniform2fv(glGetUniformLocation(ShaderHandle, "PickingColor"), 1, glm::value_ptr(glm::vec2(pickColor[0], pickColor[1])));
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);
r += 1;
if(r > 255) {
r = 0;
g += 1;
}
}
}
m_PickingBuffer.Unbind();
GLERROR("PickingPass Error");
//Publish pick event every frame with the pick data that can be picked by the event
Events::Picking pickEvent = Events::Picking(
&m_PickingBuffer,
&m_DepthBuffer,
m_Camera->ProjectionMatrix(),
m_Camera->ViewMatrix(),
m_Resolution,
&m_PickingColorsToEntity);
m_EventBroker->Publish(pickEvent);
}
void Renderer::DrawScreenQuad(GLuint textureToDraw)
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glClearColor(0.f, 0.f, 0.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT);
m_DrawScreenQuadProgram.Bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, textureToDraw);
glBindVertexArray(m_ScreenQuad->VAO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->TextureGroups[0].EndIndex - m_ScreenQuad->TextureGroups[0].StartIndex +1
, GL_UNSIGNED_INT, 0, m_ScreenQuad->TextureGroups[0].StartIndex);
}
void Renderer::InitializeTextures()
{
m_ErrorTexture=ResourceManager::Load<Texture>("Textures/Core/ErrorTexture.png");
m_WhiteTexture=ResourceManager::Load<Texture>("Textures/Core/Blank.png");
/*
glGenTextures(1, &m_PickingTexture);
glBindTexture(GL_TEXTURE_2D, m_PickingTexture);
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_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, m_Resolution.Width, m_Resolution.Height, 0, GL_RG, GL_FLOAT, NULL);//TODO: Renderer: Fix the precision and Resolution
GLERROR("m_PickingTexture initialization failed");
*/
GenerateTexture(&m_PickingTexture, GL_CLAMP_TO_BORDER, GL_LINEAR,
glm::vec2(m_Resolution.Width, m_Resolution.Height), GL_RG8, GL_RG, GL_UNSIGNED_BYTE);
}
void Renderer::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type)
{
glGenTextures(1, texture);
glBindTexture(GL_TEXTURE_2D, *texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapping);
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
GLERROR("Texture initialization failed");
}
void Renderer::InitializeFrameBuffers()//TODO: Renderer: Get this to a better location, as its really big
{
glGenRenderbuffers(1, &m_DepthBuffer);
glBindRenderbuffer(GL_RENDERBUFFER, m_DepthBuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, m_Resolution.Width, m_Resolution.Height);
m_PickingBuffer.AddResource(std::shared_ptr<BufferResource>(new RenderBuffer(&m_DepthBuffer, GL_DEPTH_ATTACHMENT)));
m_PickingBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_PickingTexture, GL_COLOR_ATTACHMENT0)));
m_PickingBuffer.Generate();
}
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