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#include <windows.h>
#include "glew.h"
#include <stdio.h>
#include <math.h>
#include "utils.h"
#include "GPUProgram.h"
#include "ObjModel.h"
#include "FBO.h"
#include "FullScreenQuad.h"
#include "Glm/glm.hpp"
#include "Glm/ext.hpp"
#pragma comment(lib,"opengl32.lib")
#pragma comment(lib,"glew32.lib")
LRESULT CALLBACK GLWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){ switch (msg) { case WM_CLOSE: PostQuitMessage(0); break; } return DefWindowProc(hwnd,msg,wParam,lParam);}
INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd){ WNDCLASSEX wndClass; wndClass.cbClsExtra = 0; wndClass.cbSize = sizeof(WNDCLASSEX); wndClass.cbWndExtra = 0; wndClass.hbrBackground = NULL; wndClass.hCursor = LoadCursor(NULL,IDC_ARROW); wndClass.hIcon = NULL; wndClass.hIconSm = NULL; wndClass.hInstance = hInstance; wndClass.lpfnWndProc=GLWindowProc; wndClass.lpszClassName = "OpenGL"; wndClass.lpszMenuName = NULL; wndClass.style = CS_VREDRAW | CS_HREDRAW; ATOM atom = RegisterClassEx(&wndClass);
RECT rect; rect.left = 0; rect.top = 0; rect.right = 1280; rect.bottom = 720; AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, FALSE);
HWND hwnd = CreateWindowEx(NULL, "OpenGL", "RenderWindow", WS_OVERLAPPEDWINDOW, 100, 100, rect.right - rect.left, rect.bottom - rect.top, NULL, NULL, hInstance, NULL); HDC dc = GetDC(hwnd); PIXELFORMATDESCRIPTOR pfd; memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR)); pfd.nVersion = 1; pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_TYPE_RGBA | PFD_DOUBLEBUFFER; pfd.iLayerType = PFD_MAIN_PLANE; pfd.iPixelType = PFD_TYPE_RGBA; pfd.cColorBits = 32; pfd.cDepthBits = 24; pfd.cStencilBits = 8;
int pixelFormatID = ChoosePixelFormat(dc, &pfd);
SetPixelFormat(dc,pixelFormatID,&pfd);
HGLRC rc = wglCreateContext(dc); wglMakeCurrent(dc, rc);
GetClientRect(hwnd, &rect); int viewportWidth = rect.right - rect.left, viewportHeight = rect.bottom - rect.top;
glewInit();
//init fsqgpu program
GPUProgram fsqProgram; fsqProgram.AttachShader(GL_VERTEX_SHADER, "res/shader/fullscreenquad.vs"); fsqProgram.AttachShader(GL_FRAGMENT_SHADER, "res/shader/fullscreenquad.fs"); fsqProgram.Link(); fsqProgram.DetectAttribute("pos"); fsqProgram.DetectAttribute("texcoord"); fsqProgram.DetectUniform("U_MainTexture");
//gpu program
GPUProgram gpuProgram; gpuProgram.AttachShader(GL_VERTEX_SHADER, "res/shader/forg.vs"); gpuProgram.AttachShader(GL_FRAGMENT_SHADER, "res/shader/forg.fs"); gpuProgram.Link();
gpuProgram.DetectAttribute("pos"); gpuProgram.DetectAttribute("texcoord"); gpuProgram.DetectAttribute("normal"); gpuProgram.DetectUniform("M"); gpuProgram.DetectUniform("V"); gpuProgram.DetectUniform("P"); gpuProgram.DetectUniform("NM"); gpuProgram.DetectUniform("U_AmbientLightColor"); gpuProgram.DetectUniform("U_AmbientMaterial"); gpuProgram.DetectUniform("U_DiffuseLightColor"); gpuProgram.DetectUniform("U_DiffuseMaterial"); gpuProgram.DetectUniform("U_DiffuseIntensity"); gpuProgram.DetectUniform("U_LightPos"); gpuProgram.DetectUniform("U_LightDirection"); gpuProgram.DetectUniform("U_Cutoff"); gpuProgram.DetectUniform("U_SpecularLightColor"); gpuProgram.DetectUniform("U_SpecularMaterial"); gpuProgram.DetectUniform("U_FogStart"); gpuProgram.DetectUniform("U_FogEnd"); gpuProgram.DetectUniform("U_FogColor"); gpuProgram.DetectUniform("U_FogDensity");
//init 3d model
ObjModel cube; cube.Init("res/model/Sphere.obj");
float identity[] = { 1.0f,0,0,0, 0,1.0f,0,0, 0,0,1.0f,0, 0,0,0,1.0f };
float ambientLightColor[] = { 0.4f,0.4f,0.4f,1.0f }; float ambientMaterial[] = { 0.2f,0.2f,0.2f,1.0f }; float diffuseLightColor[] = { 0.1f,0.4f,0.7f,1.0f }; float diffuseMaterial[] = { 0.6f, 0.6f, 0.6f, 1.0f }; float lightPos[] = { 1.0f,1.0f,0.0f,0.0f }; float diffuseIntensity = 1.0f;
float spotLightDirection[] = { 0.0f, -1.0f, 0.0f, 628.0f }; float spotLightCutoff = 5.0f; float specularLightColor[] = { 1.0f,1.0f,1.0f,1.0f }; float specularMaterial[] = { 1.0f,1.0f,1.0f,1.0f }; float eyePos[] = { 0.0f,0.0f,0.0f };
float fogStart = 2.0f; float fogEnd = 23.0f; float fogColor[] = { 0.6f, 0.6f, 0.6f, 1.0f }; float fogDensity = 0.11;
glm::mat4 cubeModelMatrix = glm::translate<float>(-2.2f, 0.0f, -4.0f) * glm::rotate(-30.0f, 1.0f, 1.0f, 1.0f); glm::mat4 cubeNormalMatrix = glm::inverseTranspose(cubeModelMatrix);
glm::mat4 cubeModelMatrix2 = glm::translate<float>(-2.0f, 0.0f, -12.0f) * glm::rotate(-30.0f, 1.0f, 1.0f, 1.0f); glm::mat4 cubeNormalMatrix2 = glm::inverseTranspose(cubeModelMatrix);
glm::mat4 cubeModelMatrix3 = glm::translate<float>(-0.4f, 0.0f, -20.0f) * glm::rotate(-30.0f, 1.0f, 1.0f, 1.0f); glm::mat4 cubeNormalMatrix3 = glm::inverseTranspose(cubeModelMatrix); //glm::mat4 viewMatrix = glm::lookAt(glm::vec3(1.0f, 0.5f, -10.0f), glm::vec3(0.0f, 0.0f, -1.0f), glm::vec3(0.0f, 1.0f, 0.0f));
glm::mat4 projectionMatrix = glm::perspective(50.0f, (float)viewportWidth / (float)viewportHeight, 0.1f, 1000.0f); //��ʼ��fsq
FullScreenQuad fsq; fsq.Init();
//��ʼ��2��fbo
FBO fbo[2]; fbo[0].AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight); fbo[0].AttachDepthBuffer("depth", viewportWidth, viewportHeight); fbo[0].Finish(); fbo[1].AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight); fbo[1].AttachDepthBuffer("depth", viewportWidth, viewportHeight); fbo[1].Finish();
ShowWindow(hwnd, SW_SHOW); UpdateWindow(hwnd);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f); MSG msg; while (true) { if (PeekMessage(&msg,NULL,NULL,NULL,PM_REMOVE)) { if (msg.message==WM_QUIT) { break; } TranslateMessage(&msg); DispatchMessage(&msg); } glEnable(GL_DEPTH_TEST); glUseProgram(gpuProgram.mProgram);
glUniformMatrix4fv(gpuProgram.GetLocation("V"), 1, GL_FALSE, identity); glUniformMatrix4fv(gpuProgram.GetLocation("P"), 1, GL_FALSE, glm::value_ptr(projectionMatrix));
glUniform4fv(gpuProgram.GetLocation("U_AmbientLightColor"), 1, ambientLightColor); glUniform4fv(gpuProgram.GetLocation("U_AmbientMaterial"), 1, ambientMaterial); glUniform4fv(gpuProgram.GetLocation("U_DiffuseLightColor"), 1, diffuseLightColor); glUniform4fv(gpuProgram.GetLocation("U_DiffuseMaterial"), 1, diffuseMaterial); glUniform1f(gpuProgram.GetLocation("U_DiffuseIntensity"), diffuseIntensity); glUniform4fv(gpuProgram.GetLocation("U_LightPos"), 1, lightPos); glUniform4fv(gpuProgram.GetLocation("U_LightDirection"), 1, spotLightDirection); glUniform1f(gpuProgram.GetLocation("U_Cutoff"), spotLightCutoff); glUniform4fv(gpuProgram.GetLocation("U_SpecularLightColor"), 1, specularLightColor); glUniform4fv(gpuProgram.GetLocation("U_SpecularMaterial"), 1, specularMaterial); glUniform3fv(gpuProgram.GetLocation("U_EyePos"), 1, eyePos); glUniform1f(gpuProgram.GetLocation("U_FogStart"), fogStart); glUniform1f(gpuProgram.GetLocation("U_FogEnd"), fogEnd); glUniform4fv(gpuProgram.GetLocation("U_FogColor"), 1, fogColor);
fbo[0].Bind(); fogDensity = 0.11; glUniform1f(gpuProgram.GetLocation("U_FogDensity"), fogDensity); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(cubeModelMatrix)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(cubeNormalMatrix)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(cubeModelMatrix2)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(cubeNormalMatrix2)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(cubeModelMatrix3)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(cubeNormalMatrix3)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); fbo[0].Unbind();
fbo[1].Bind(); fogDensity = 0.31; glUniform1f(gpuProgram.GetLocation("U_FogDensity"), fogDensity); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(cubeModelMatrix)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(cubeNormalMatrix)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(cubeModelMatrix2)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(cubeNormalMatrix2)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(cubeModelMatrix3)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(cubeNormalMatrix3)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); fbo[1].Unbind(); glUseProgram(0); glFlush();
glClearColor(0.6f, 0.6f, 0.6f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glActiveTexture(GL_TEXTURE0); glUseProgram(fsqProgram.mProgram); glBindTexture(GL_TEXTURE_2D, fbo[0].GetBuffer("color")); glUniform1i(fsqProgram.GetLocation("U_MainTexture"), 0); fsq.DrawToLeftTop(fsqProgram.GetLocation("pos"), fsqProgram.GetLocation("texcoord"));
glBindTexture(GL_TEXTURE_2D, fbo[1].GetBuffer("color")); glUniform1i(fsqProgram.GetLocation("U_MainTexture"), 0); fsq.DrawToRightTop(fsqProgram.GetLocation("pos"), fsqProgram.GetLocation("texcoord"));
glUseProgram(0);
SwapBuffers(dc); } return 0;}
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