TLesson9.rar

#include <windows.h> #include <GL/gl.h> #include <GL/glu.h> #include <gl/glaux.h> #include <iostream.h> #include <stdio.h> #include <io.h> HGLRC hRC=NULL; HDC hDC=NULL; HWND hWnd=NULL; HINSTANCE hInstance; RECT rect; int sw = 640; int sh = 480; bool fullscreen = 1; GLfloat aspect; GLfloat xrot; // X轴旋转 ( 新 ) GLfloat yrot; // Y轴旋转 ( 新 ) GLfloat xspeed; // X轴旋转速度 GLfloat yspeed; // Y轴旋转速度 GLfloat z=-25.0f; // 移入屏幕的深度 bool light; //光源-开/关( 新 ) bool blend; //透明混合开/关 //bool lp; //L键是否按下? ( 新 ) bool fp; //F键是否按下? ( 新 ) GLfloat LightAmbient[]= { 0.5f, 0.5f, 0.5f, 1.0f }; //环境光的值（新） GLfloat LightDiffuse[]= { 1.0f, 1.0f, 1.0f, 1.0f }; //散射光的值（新） GLfloat LightPosition[]= { 0.0f, 0.0f, 2.0f, 1.0f }; //光照位置 （新） GLuint filter; //过滤器选择 GLuint texture[1]; //纹理的存储空间 ( 新 ) typedef struct //建立一个结构 { int r, g, b; //粒子的颜色 int x,y,z; //粒子的位置 GLfloat life; //粒子的停留时间 }particle; const partol=50; //粒子的数量 particle par[partol]; //粒子数组 GLint ploop; //循环变量 #pragma comment( lib, "opengl32.lib" ) // 链接时使用OpenGL32.lib #pragma comment( lib, "glu32.lib" ) // 链接时使用GLu32.lib #pragma comment( lib, "glaux.lib" ) // 链接时使用GLaux.lib AUX_RGBImageRec *LoadBMP(char *Filename) // 读取位图图象 { FILE *File=NULL; // 文件句柄 if (!Filename) // 确定文件名已给出 { return NULL; // 如果文件名未给出则返回NULL } File=fopen(Filename,"r"); // 检测文件是否存在 if (File) // 文件是否存在? { fclose(File); // 关闭文件 return auxDIBImageLoad(Filename); // 读取位图并返回一个指针 } return NULL; //如果调用文件失败则返回NULL } int LoadGLTextures() //调用Bitmap并转换成纹理 { int Status=FALSE; //状态确定 AUX_RGBImageRec *TextureImage[1]; //为纹理创建存储空间 memset(TextureImage,0,sizeof(void *)*1); //将指针设为NULL //读取位图，检查错误。如果位图不存在则退出 if (TextureImage[0]=LoadBMP("Data/star.bmp")) { Status=TRUE; //设Status为TRUE glGenTextures(3, &texture[0]); //创建纹理 //用位图中的数据进行典型的纹理生成 glBindTexture(GL_TEXTURE_2D, texture[0]); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data); } if (TextureImage[0]) //纹理是否存在 { if (TextureImage[0]->data) //纹理图象是否存在 { free(TextureImage[0]->data); //释放纹理图象所占用内存 } free(TextureImage[0]); //释放图象结构 } return Status; //返回Status的值 } void SceneResizeViewport(GLsizei w,GLsizei h) { if(0==h) { h=1; } aspect=(GLfloat)w/(GLfloat)h; glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0f,aspect,0.1f,100.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } int SceneInit(int w, int h) { LoadGLTextures(); glEnable(GL_TEXTURE_2D); glShadeModel(GL_SMOOTH); glClearColor(0.0f,0.0f,0.0f,0.0f); glClearDepth(1.0f); glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient); //设置环境光 glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse); //设置漫反射光 glLightfv(GL_LIGHT1, GL_POSITION,LightPosition); //光源的位置 glEnable(GL_LIGHT1); glColor4f(1.0f, 1.0f, 1.0f, 0.5); //全亮度，50%alpha值（新） glBlendFunc(GL_SRC_ALPHA,GL_ONE); //基于alpha值半透明的混合方式（新） glEnable(GL_BLEND); for(ploop=0;ploop<partol;ploop++) { par[ploop].r=rand()%256; //粒子随机的色彩 par[ploop].g=rand()%256; par[ploop].b=rand()%256; par[ploop].x=rand()%15; //粒子随机的位置 par[ploop].y=rand()%15; par[ploop].z=rand()%15; par[ploop].life=float(rand()%80); //粒子随机的屏幕停留时间 } return TRUE; } int SceneShow(GLvoid) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); for(ploop=0;ploop<partol;ploop++) { while (par[ploop].life<=0) { par[ploop].r=rand()%256; par[ploop].g=rand()%256; par[ploop].b=rand()%256; par[ploop].x=rand()%15; par[ploop].y=rand()%15; par[ploop].z=rand()%15; par[ploop].life=float(rand()%80); } par[ploop].life-=0.5f; if(par[ploop].life>0) par[ploop].r-=2; if(par[ploop].life>0) par[ploop].g-=2; if(par[ploop].life>0) par[ploop].b-=2; } for (ploop=0;ploop<partol;ploop++) { glLoadIdentity(); //重置当前Modelview矩阵 glTranslatef(-5.0f+par[ploop].x,par[ploop].y-5.0f,par[ploop].z+z); //按z值向屏幕内外移动 入/出 glColor4ub(par[ploop].r,par[ploop].g,par[ploop].b,255); glBegin(GL_QUADS); glNormal3f( 0.0f, 0.0f, 1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glEnd(); } return TRUE; } void DisableOpenGL() { wglMakeCurrent(NULL,NULL); wglDeleteContext(hRC); ReleaseDC(hWnd,hDC); } void EnableOpenGL() { PIXELFORMATDESCRIPTOR pfd; int iFormat; hDC = GetDC( hWnd ); ZeroMemory( &pfd, sizeof( pfd ) ); pfd.nSize = sizeof( pfd ); pfd.nVersion = 1; pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER; pfd.iPixelType = PFD_TYPE_RGBA; pfd.cColorBits = 16; pfd.cDepthBits = 16; pfd.iLayerType = PFD_MAIN_PLANE; iFormat = ChoosePixelFormat( hDC, &pfd ); if(0==iFormat) { cout<<"选择象素失败！"; iFormat=1; } SetPixelFormat( hDC, iFormat, &pfd ); hRC = wglCreateContext( hDC ); wglMakeCurrent( hDC, hRC ); } bool ChangeResolution(int w, int h, int bitdepth) { DEVMODE devMode; int modeSwitch; int closeMode = 0; EnumDisplaySettings(NULL, closeMode, &devMode); devMode.dmBitsPerPel = bitdepth; devMode.dmPelsWidth = w; devMode.dmPelsHeight = h; devMode.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT; modeSwitch = ChangeDisplaySettings(&devMode, CDS_FULLSCREEN); if(DISP_CHANGE_SUCCESSFUL == modeSwitch) { return true; } else { ChangeDisplaySettings(NULL, 0); return false; } } LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam ) { switch ( message ) { case WM_CREATE: GetWindowRect(hWnd, &rect); sw = rect.right - rect.left; sh = rect.bottom - rect.top; SceneResizeViewport(sw, sh); return 0; case WM_SIZE: if(!fullscreen) { GetWindowRect(hWnd, &rect); sw = rect.right - rect.left; sh = rect.bottom - rect.top; if(sw>0 && sh>0) SceneResizeViewport(sw, sh); } else { SceneResizeViewport(GetSystemMetrics( SM_CXSCREEN ), GetSystemMetrics( SM_CYSCREEN )); } return 0; case WM_CLOSE: ShowWindow (hWnd, SW_HIDE); PostQuitMessage( 0 ); return 0; case WM_DESTROY: return 0; case WM_KEYDOWN: switch( wParam ) { case VK_ESCAPE: PostMessage(hWnd, WM_CLOSE, 0, 0); break; case 'F': // if (!fp) // { fp=TRUE; filter+=1; if (filter>2) { filter=0; } // } /* else { fp=FALSE; }*/ break; case 'B': blend=!blend; if(blend) { glEnable(GL_BLEND); glDisable(GL_DEPTH_TEST); } else { glDisable(GL_BLEND); glEnable(GL_DEPTH_TEST); } case VK_PRIOR: z-=0.02f; break; case VK_NEXT: z+=0.02f; break; case VK_UP: xspeed-=0.01f; break; case VK_DOWN: