OPENGL.rar_opengl 立方体

#include <windows.h> #include <GL/gl.h> char *className = "OpenGL"; char *windowName = "OpenGL Cube"; int winX = 0, winY = 0; int winWidth = 300, winHeight = 300; HDC hDC; HGLRC hGLRC; HPALETTE hPalette; void init(void) { /* set viewing projection */ glMatrixMode(GL_PROJECTION); glFrustum(-0.5F, 0.5F, -0.5F, 0.5F, 1.0F, 3.0F); /* position viewer */ glMatrixMode(GL_MODELVIEW); glTranslatef(0.0F, 0.0F, -2.0F); /* position object */ glRotatef(30.0F, 1.0F, 0.0F, 0.0F); glRotatef(30.0F, 0.0F, 1.0F, 0.0F); glEnable(GL_DEPTH_TEST); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); } void redraw(void) { /* clear color and depth buffers */ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); /* draw six faces of a cube */ glBegin(GL_QUADS); glNormal3f( 0.0F, 0.0F, 1.0F); glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f(-0.5F, 0.5F, 0.5F); glVertex3f(-0.5F,-0.5F, 0.5F); glVertex3f( 0.5F,-0.5F, 0.5F); glNormal3f( 0.0F, 0.0F,-1.0F); glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f(-0.5F, 0.5F,-0.5F); glVertex3f( 0.5F, 0.5F,-0.5F); glVertex3f( 0.5F,-0.5F,-0.5F); glNormal3f( 0.0F, 1.0F, 0.0F); glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f( 0.5F, 0.5F,-0.5F); glVertex3f(-0.5F, 0.5F,-0.5F); glVertex3f(-0.5F, 0.5F, 0.5F); glNormal3f( 0.0F,-1.0F, 0.0F); glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f( 0.5F,-0.5F,-0.5F); glVertex3f( 0.5F,-0.5F, 0.5F); glVertex3f(-0.5F,-0.5F, 0.5F); glNormal3f( 1.0F, 0.0F, 0.0F); glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f( 0.5F,-0.5F, 0.5F); glVertex3f( 0.5F,-0.5F,-0.5F); glVertex3f( 0.5F, 0.5F,-0.5F); glNormal3f(-1.0F, 0.0F, 0.0F); glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f(-0.5F,-0.5F, 0.5F); glVertex3f(-0.5F, 0.5F, 0.5F); glVertex3f(-0.5F, 0.5F,-0.5F); glEnd(); SwapBuffers(hDC); } void resize(void) { /* set viewport to cover the window */ glViewport(0, 0, winWidth, winHeight); } void setupPixelFormat(HDC hDC) { PIXELFORMATDESCRIPTOR pfd = { sizeof(PIXELFORMATDESCRIPTOR), /* size */ 1, /* version */ PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER, /* support double-buffering */ PFD_TYPE_RGBA, /* color type */ 16, /* prefered color depth */ 0, 0, 0, 0, 0, 0, /* color bits (ignored) */ 0, /* no alpha buffer */ 0, /* alpha bits (ignored) */ 0, /* no accumulation buffer */ 0, 0, 0, 0, /* accum bits (ignored) */ 16, /* depth buffer */ 0, /* no stencil buffer */ 0, /* no auxiliary buffers */ PFD_MAIN_PLANE, /* main layer */ 0, /* reserved */ 0, 0, 0, /* no layer, visible, damage masks */ }; int pixelFormat; pixelFormat = ChoosePixelFormat(hDC, &pfd); if (pixelFormat == 0) { MessageBox(WindowFromDC(hDC), "ChoosePixelFormat failed.", "Error", MB_ICONERROR | MB_OK); exit(1); } if (SetPixelFormat(hDC, pixelFormat, &pfd) != TRUE) { MessageBox(WindowFromDC(hDC), "SetPixelFormat failed.", "Error", MB_ICONERROR | MB_OK); exit(1); } } void setupPalette(HDC hDC) { int pixelFormat = GetPixelFormat(hDC); PIXELFORMATDESCRIPTOR pfd; LOGPALETTE* pPal; int paletteSize; DescribePixelFormat(hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd); if (pfd.dwFlags & PFD_NEED_PALETTE) { paletteSize = 1 << pfd.cColorBits; } else { return; } pPal = (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY)); pPal->palVersion = 0x300; pPal->palNumEntries = paletteSize; /* build a simple RGB color palette */ { int redMask = (1 << pfd.cRedBits) - 1; int greenMask = (1 << pfd.cGreenBits) - 1; int blueMask = (1 << pfd.cBlueBits) - 1; int i; for (i=0; i<paletteSize; ++i) { pPal->palPalEntry[i].peRed = (((i >> pfd.cRedShift) & redMask) * 255) / redMask; pPal->palPalEntry[i].peGreen = (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask; pPal->palPalEntry[i].peBlue = (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask; pPal->palPalEntry[i].peFlags = 0; } } hPalette = CreatePalette(pPal); free(pPal); if (hPalette) { SelectPalette(hDC, hPalette, FALSE); RealizePalette(hDC); } } LRESULT APIENTRY WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { case WM_CREATE: /* initialize OpenGL rendering */ hDC = GetDC(hWnd); setupPixelFormat(hDC); setupPalette(hDC); hGLRC = wglCreateContext(hDC); wglMakeCurrent(hDC, hGLRC); init(); return 0; case WM_DESTROY: /* finish OpenGL rendering */ if (hGLRC) { wglMakeCurrent(NULL, NULL); wglDeleteContext(hGLRC); } if (hPalette) { DeleteObject(hPalette); } ReleaseDC(hWnd, hDC); PostQuitMessage(0); return 0; case WM_SIZE: /* track window size changes */ if (hGLRC) { winWidth = (int) LOWORD(lParam); winHeight = (int) HIWORD(lParam); resize(); return 0; } case WM_PALETTECHANGED: /* realize palette if this is *not* the current window */ if (hGLRC && hPalette && (HWND) wParam != hWnd) { UnrealizeObject(hPalette); SelectPalette(hDC, hPalette, FALSE); RealizePalette(hDC); redraw(); break; } break; case WM_QUERYNEWPALETTE: /* realize palette if this is the current window */ if (hGLRC && hPalette) { UnrealizeObject(hPalette); SelectPalette(hDC, hPalette, FALSE); RealizePalette(hDC); redraw(); return TRUE; } break; case WM_PAINT: { PAINTSTRUCT ps; BeginPaint(hWnd, &ps); if (hGLRC) { redraw(); } EndPaint(hWnd, &ps); return 0; } break; case WM_CHAR: /* handle keyboard input */ switch ((int)wParam) { case VK_ESCAPE: DestroyWindow(hWnd); return 0; default: break; } break; default: break; } return DefWindowProc(hWnd, message, wParam, lParam); } int APIENTRY WinMain(HINSTANCE hCurrentInst, HINSTANCE hPreviousInst, LPSTR lpszCmdLine, int nCmdShow) { WNDCLASS wndClass; HWND hWnd; MSG msg; /* register window class */ wndClass.style = CS_HREDRAW | CS_VREDRAW; wndClass.lpfnWndProc = WndProc; wndClass.cbClsExtra = 0; wndClass.cbWndExtra = 0; wndClass.hInstance = hCurrentInst; wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION); wndClass.hCursor = LoadCursor(NULL, IDC_ARROW); wndClass.hbrBackground = (HBRUSH__ *)GetStockObject(BLACK_BRUSH); wndClass.lpszMenuName = NULL; wndClass.lpszClassName = className; RegisterClass(&wndClass); /* create window */ hWnd = CreateWindow( className, windowName, WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS, winX, winY, winWidth, winHeight, NULL, NULL, hCurrentInst, NULL); /* display window */ ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); /* process messages */ while (GetMessage(&msg, NULL, 0, 0) == TRUE) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; }