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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 = 800; rect.bottom = 600; 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");
//init gpu program
GPUProgram gpuProgram; gpuProgram.AttachShader(GL_VERTEX_SHADER, "res/shader/test.vs"); gpuProgram.AttachShader(GL_FRAGMENT_SHADER, "res/shader/test.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_EyePos");
//init 3d model
ObjModel cube; cube.Init("res/model/Cube.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[] = { 1.0f,1.0f,1.0f,1.0f }; float diffuseMaterial[] = { 0.8f, 0.8f, 0.8f, 1.0f }; float lightPos[] = {0.0f,1.0f,0.0f,0.0f}; float diffuseIntensity = 1.0f; float spotLightDirection[] = {0.0f, -1.0f, 0.0f, 128.0f};//������һλ�ij�......
float spotLightCutoff = 0.0f;
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 };
glm::mat4 model1 = glm::translate<float>(-2.0f, 0.0f, -6.0f) * glm::rotate(-30.0f , 1.0f, 1.0f, 1.0f); glm::mat4 model2 = glm::translate<float>(2.0f, 0.0f, -6.0f) * glm::rotate(-30.0f, 1.0f, 1.0f, 1.0f); glm::mat4 model3 = glm::translate<float>(6.0f, 0.0f, -6.0f) * glm::rotate(-30.0f, 1.0f, 1.0f, 1.0f); glm::mat4 viewMatrix1 = glm::lookAt(glm::vec3(-0.0f, 1.5f, -3.0f), glm::vec3(-2.0f, 0.0f, -6.0f), glm::vec3(0.0f, 1.0f, 0.0f)); glm::mat4 viewMatrix2 = glm::lookAt(glm::vec3(3.0f, 1.5f, -3.0f), glm::vec3(2.0f, 0.0f, -6.0f), glm::vec3(0.0f, 1.0f, 0.0f)); glm::mat4 viewMatrix3 = glm::lookAt(glm::vec3(7.0f, 1.5f, -3.0f), glm::vec3(6.0f, 0.0f, -6.0f), glm::vec3(0.0f, 1.0f, 0.0f));
glm::mat4 projectionMatrix = glm::perspective(50.0f, 800.0f / 600.0f, 0.1f, 1000.0f);
glm::mat4 normalMatrix1 = glm::inverseTranspose(model1); glm::mat4 normalMatrix2 = glm::inverseTranspose(model2); glm::mat4 normalMatrix3 = glm::inverseTranspose(model3);
//��ʼ��fsq
FullScreenQuad fsq; fsq.Init();
//��ʼ��FBO
FBO fboDirectionLight; fboDirectionLight.AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight); fboDirectionLight.AttachDepthBuffer("depth", viewportWidth, viewportHeight); fboDirectionLight.Finish();
FBO fboPointerLight; fboPointerLight.AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight); fboPointerLight.AttachDepthBuffer("depth", viewportWidth, viewportHeight); fboPointerLight.Finish();
FBO fboSpotLight; fboSpotLight.AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight); fboSpotLight.AttachDepthBuffer("depth", viewportWidth, viewportHeight); fboSpotLight.Finish();
glClearColor(41.0f/255.0f, 71.0f/255.0f, 121.0f / 255.0f, 1.0f); 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("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); glUniform4fv(gpuProgram.GetLocation("U_LightDirection"), 1, spotLightDirection); glUniform4fv(gpuProgram.GetLocation("U_SpecularLightColor"), 1, specularLightColor); glUniform4fv(gpuProgram.GetLocation("U_SpecularMaterial"), 1, specularMaterial); glUniform3fv(gpuProgram.GetLocation("U_EyePos"), 1, eyePos);
//left
fboDirectionLight.Bind(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); lightPos[0] = 0.0f; lightPos[1] = 1.5f; lightPos[2] = 0.0f; lightPos[3] = 0.0f; diffuseIntensity = 1.0f; spotLightCutoff = 0.0f; glUniform4fv(gpuProgram.GetLocation("U_LightPos"), 1, lightPos); glUniform1f(gpuProgram.GetLocation("U_DiffuseIntensity"), diffuseIntensity); glUniform1f(gpuProgram.GetLocation("U_Cutoff"), spotLightCutoff); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(model1)); glUniformMatrix4fv(gpuProgram.GetLocation("V"), 1, GL_FALSE, glm::value_ptr(viewMatrix1)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(normalMatrix1)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); fboDirectionLight.Unbind();
//middle
fboPointerLight.Bind(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); lightPos[0] = 0.0f; lightPos[1] = 3.0f; lightPos[2] = -6.0f; lightPos[3] = 1.0f; diffuseIntensity = 3.0f; spotLightCutoff = 0.0f; glUniform4fv(gpuProgram.GetLocation("U_LightPos"), 1, lightPos); glUniform1f(gpuProgram.GetLocation("U_DiffuseIntensity"), diffuseIntensity); glUniform1f(gpuProgram.GetLocation("U_Cutoff"), spotLightCutoff); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(model2)); glUniformMatrix4fv(gpuProgram.GetLocation("V"), 1, GL_FALSE, glm::value_ptr(viewMatrix2)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(normalMatrix2)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); fboDirectionLight.Unbind();
//right
fboSpotLight.Bind(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); lightPos[0] = 6.0f; lightPos[1] = 3.0f; lightPos[2] = -6.0f; lightPos[3] = 1.0f; diffuseIntensity = 4.0f; spotLightCutoff = 15.0f; glUniform4fv(gpuProgram.GetLocation("U_LightPos"), 1, lightPos); glUniform1f(gpuProgram.GetLocation("U_DiffuseIntensity"), diffuseIntensity); glUniform1f(gpuProgram.GetLocation("U_Cutoff"), spotLightCutoff); glUniformMatrix4fv(gpuProgram.GetLocation("M"), 1, GL_FALSE, glm::value_ptr(model3)); glUniformMatrix4fv(gpuProgram.GetLocation("V"), 1, GL_FALSE, glm::value_ptr(viewMatrix3)); glUniformMatrix4fv(gpuProgram.GetLocation("NM"), 1, GL_FALSE, glm::value_ptr(normalMatrix3)); cube.Bind(gpuProgram.GetLocation("pos"), gpuProgram.GetLocation("texcoord"), gpuProgram.GetLocation("normal")); cube.Draw(); fboSpotLight.Unbind();
glUseProgram(0); glFlush();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(fsqProgram.mProgram); glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, fboDirectionLight.GetBuffer("color")); glUniform1i(fsqProgram.GetLocation("U_MainTexture"), 0); fsq.DrawToLeftTop(fsqProgram.GetLocation("pos"), fsqProgram.GetLocation("texcoord"));
glBindTexture(GL_TEXTURE_2D, fboSpotLight.GetBuffer("color")); glUniform1i(fsqProgram.GetLocation("U_MainTexture"), 0); fsq.DrawToLeftBottom(fsqProgram.GetLocation("pos"), fsqProgram.GetLocation("texcoord")); glBindTexture(GL_TEXTURE_2D, fboPointerLight.GetBuffer("color")); glUniform1i(fsqProgram.GetLocation("U_MainTexture"), 0); fsq.DrawToRightTop(fsqProgram.GetLocation("pos"), fsqProgram.GetLocation("texcoord")); glFlush();
SwapBuffers(dc); } return 0;}
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