shadow map PCF

/*********************************************** * * * 对NeHeGL.h中框架函数的定义 * * * * ***********************************************/ #include <windows.h> #include "glew.h" #include <stdio.h> #include <stdarg.h> // Header File For Windows #include "glaux.h" #include "NeHeGL.h" // Header File For NeHeGL #include "MyMath.h" #include "Camera.h" #include <stdio.h> #include <math.h> #include "CShader.h" #include "Matrix16.h" #pragma comment (lib,"opengl32.lib") #pragma comment (lib,"glu32.lib") #pragma comment(lib,"glaux.lib") #pragma comment(lib,"glew32.lib") #ifndef CDS_FULLSCREEN // CDS_FULLSCREEN Is Not Defined By Some #define CDS_FULLSCREEN 4 // Compilers. By Defining It This Way, #endif #define _ARB_ENABLE true // We Can Avoid Errors GLuint list; GLuint base; // Base Display List For The Font GLuint texture[2]; // Storage For Our Font Texture GLuint loop; // Generic Loop Variable extern float g_fps; //全局变量 GL_Window* g_window; Keys* g_keys; Mouse* g_mouse; Camera* g_camera; CShader* shader; extern POINT curPos; extern POINT oldCurPos; GLuint tex_target; float g_mProjection[16] = {0}; float g_mModelView[16] = {0}; float g_mCameraInverse[16] = {0}; CMatrix16 ci; GLfloat ambient[]={0.2,0.2,0.2,1.0}; GLfloat diffuse[]={0.9,0.9,0.9,1.0}; GLfloat g_LightPosition[]={100.0,20.0,0.0,0.0}; GLfloat specular[]={1.0f,1.0f,1.0f,1.0F}; GLfloat shininess=10.0f; GLfloat g_LightView[]={0.0,0.0,0.0,0.0}; /********************************************************** 工具函数 ***********************************************************/ void emptyTexture(); AUX_RGBImageRec *LoadBMP(char *Filename) ; int LoadGLFontTextures() ; GLvoid BuildFont(GLvoid) ; GLvoid KillFont(GLvoid) ; GLvoid glPrint(GLint x, GLint y, char *string, int set); void ShowFPS(); int LoadGLTextures(char * str,GLuint& texid); // Performs All Your Initialization BOOL Initialize (GL_Window* window, Keys* keys,Mouse* mouse) { emptyTexture(); g_mouse=mouse; g_window = window; g_keys = keys; g_camera =new Camera(); glMatrixMode (GL_PROJECTION); // Select The Projection Matrix glLoadIdentity (); gluPerspective(45, (float)window->init.width/(float)window->init.height, 0.1f, 500); if (!LoadGLFontTextures()) // Jump To Texture Loading Routine { return FALSE; // If Texture Didn't Load Return FALSE } BuildFont(); ShowCursor(TRUE); int err=glewInit(); if(err!=GLEW_OK) MessageBox(NULL,"failed to init glew.","Error",MB_OK); glEnable(GL_POINT_SPRITE); glEnable(GL_TEXTURE_2D); glShadeModel(GL_SMOOTH); // Enable Smooth Shading glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // Black Background glClearDepth(1.0f); // Depth Buffer Setup glEnable(GL_DEPTH_TEST); // Enables Depth Testing glDepthFunc(GL_LEQUAL); glViewport(0 , 0,window->init.width ,window->init.height); // Set Up A Viewport glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); shader=new CShader("temp.vert","temp.frag"); shader->loadShaders(); return true; } // Performs All Your DeInitialization void Deinitialize (void) { } // Perform Motion Updates void Update (DWORD milliseconds) { // Is ESC Being Pressed? if (g_keys->keyDown [VK_ESCAPE]) TerminateApplication (g_window); if(true== g_mouse->isRClicked) { GetCursorPos(&curPos); g_camera->CalcAngle(curPos.x-oldCurPos.x,curPos.y-oldCurPos.y); SetCursorPos(oldCurPos.x,oldCurPos.y); } g_camera->Update(milliseconds); g_camera->Set(0); } void emptyTexture() { GLuint* data; data=(GLuint*)new GLuint[((1024*768)*3*sizeof(GLuint))]; ZeroMemory(data,((1024*768)*3*sizeof(GLuint))); glGenTextures(1,&tex_target); glBindTexture(GL_TEXTURE_2D,tex_target); glTexImage2D(GL_TEXTURE_2D,0,GL_DEPTH_COMPONENT,1024,768,0,GL_DEPTH_COMPONENT,GL_UNSIGNED_INT,data); 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_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); delete [] data; } void RenderWorld(bool on) { //glActiveTexture(GL_TEXTURE0); //glBindTexture(GL_TEXTURE_2D,tex_floor); if(on){ //glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D,tex_target); shader->enableShaders(); } glPushMatrix(); //glTranslatef(0, -5, 0); //DrawWalls(); glColor4f(1,0,0,1); glBegin(GL_QUADS); glNormal3f(0,1,0); //glTexCoord2f(0.0f, 0.0f); glVertex3f(100.0f,0.0f, -100.0f); //glTexCoord2f(8.0f, 0.0f); glVertex3f(-100.0f,0.0f, -100.0f); // glTexCoord2f(8.0f, 5.0f); glVertex3f(-100.0f, 0.0f, 100.0f); // glTexCoord2f(0.0f, 5.0f); glVertex3f(100.0f,0.0f,100.0f); glEnd(); //draw cubic glPushMatrix(); glTranslatef(0,-10,0); //glScalef(0.5,0.5,0.5); glBegin(GL_QUADS); glColor4f(0,0,1,1); glNormal3f(0,1,0); glVertex3f(3.0f,25.0f, -3.0f); glVertex3f(-3.0f,25.0f, -3.0f); glVertex3f(-3.0f, 25.0f, 3.0f); glVertex3f(3.0f,25.0f,3.0f); glEnd(); //前侧面 glBegin(GL_QUADS); glNormal3f(0,0,1); glVertex3f(-3.0f,19.0f, 3.0f); glVertex3f(3.0f,19.0f, 3.0f); glVertex3f(3.0f, 25.0f, 3.0f); glVertex3f(-3.0f,25.0f,3.0f); glEnd(); //左侧面 glBegin(GL_QUADS); glNormal3f(-1,0,0); glVertex3f(-3.0f,19.0f, -3.0f); glVertex3f(-3.0f,19.0f, 3.0f); //glMultiTexCoord2f(GL_TEXTURE0,1.0f, 1.0f); glVertex3f(-3.0f, 25.0f, 3.0f); //glMultiTexCoord2f(GL_TEXTURE0,0.0f, 1.0f); glVertex3f(-3.0f,25.0f,-3.0f); glEnd(); //右侧面 glBegin(GL_QUADS); glNormal3f(1,0,0); //glMultiTexCoord2f(GL_TEXTURE0,0.0f, 0.0f); glVertex3f(3.0f,19.0f, -3.0f); //glMultiTexCoord2f(GL_TEXTURE0,1.0f, 0.0f); glVertex3f(3.0f,19.0f, 3.0f); //glMultiTexCoord2f(GL_TEXTURE0,1.0f, 1.0f); glVertex3f(3.0f, 25.0f, 3.0f); //glMultiTexCoord2f(GL_TEXTURE0,0.0f, 1.0f); glVertex3f(3.0f,25.0f,-3.0f); glEnd(); //后侧面 glBegin(GL_QUADS); glNormal3f(0,0,-1); //glMultiTexCoord2f(GL_TEXTURE0,0.0f, 0.0f); glVertex3f(3.0f,19.0f, -3.0f); //glMultiTexCoord2f(GL_TEXTURE0,1.0f, 0.0f); glVertex3f(-3.0f,19.0f, -3.0f); //glMultiTexCoord2f(GL_TEXTURE0,1.0f, 1.0f); glVertex3f(-3.0f, 25.0f, -3.0f); //glMultiTexCoord2f(GL_TEXTURE0,0.0f, 1.0f); glVertex3f(3.0f,25.0f,-3.0f); glEnd(); //底面 glBegin(GL_QUADS); glNormal3f(0,-1,0); //glMultiTexCoord2f(GL_TEXTURE0,0.0f, 0.0f); glVertex3f(-3.0f,19.0f, 3.0f); //glMultiTexCoord2f(GL_TEXTURE0,1.0f, 0.0f); glVertex3f(3.0f,19.0f, 3.0f); //glMultiTexCoord2f(GL_TEXTURE0,1.0f, 1.0f); glVertex3f(3.0f, 19.0f, -3.0f); //glMultiTexCoord2f(GL_TEXTURE0,0.0f, 1.0f); glVertex3f(-3.0f,19.0f,-3.0f); glEnd(); glPopMatrix(); glColor4f(1,1,1,1); glPopMatrix(); if(on){ shader->disableShaders(); } } void ApplyShadowMap() { // Let's turn our shaders on for doing shadow mapping on our world //g_Shader.TurnOn(); // Turn on our texture unit for shadow mapping and bind our depth texture glBindTexture(GL_TEXTURE_2D, tex_target); // Give GLSL our texture unit that holds the shadow map //GLuint uniform = glGetUniformLocationARB(g_Shader.GetProgram(), "shadowMap"); //glUniform1iARB(uniform, 0); // Here is where w