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C-/C++-Quelltext

float g_fTimeDiff=0.0f;
float g_fTimeElapsed=0.0f;
// Includes
#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
// Function Declarations
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
void EnableOpenGL(HWND hWnd, HDC * hDC, HGLRC * hRC);
void DisableOpenGL(HWND hWnd, HDC hDC, HGLRC hRC);
// WinMainint WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow) 
{
WNDCLASS wc;
HWND hWnd;
HDC hDC;
HGLRC hRC;
MSG msg;
BOOL quit = FALSE;float theta = 0.0f; 
LONGLONG llFrequency;
LONGLONG llTime1;
LONGLONG llTime2;
 
// register window class
wc.style = CS_OWNDC;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon( NULL, IDI_APPLICATION );
wc.hCursor = LoadCursor( NULL, IDC_ARROW );
wc.hbrBackground = (HBRUSH)GetStockObject( BLACK_BRUSH );
wc.lpszMenuName = NULL;wc.lpszClassName = "GLSample"; 
RegisterClass( &wc );
 
// create main window
hWnd = CreateWindow( "GLSample", "OpenGL Sample", 
WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE,
0, 0, 800, 600,
NULL, NULL, hInstance, NULL );
 
// enable OpenGL for the window
EnableOpenGL( hWnd, &hDC, &hRC );
 
// program main loop
QueryPerformanceFrequency((LARGE_INTEGER*)(&llFrequency));while ( !quit ) 
{
QueryPerformanceCounter((LARGE_INTEGER*)(&llTime1));
// check for messagesif ( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) ) 
{
// handle or dispatch messagesif ( msg.message == WM_QUIT ) 
{
quit = TRUE;
} else 
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
} else 
{
// OpenGL animation code goes here
glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
// Culling
//glEnable( GL_CULL_FACE );
//glFrontFace(GL_CCW);
//glCullFace(GL_BACK);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity();
glRotatef( theta, 0.2f, 0.4f, 0.6f );
glBegin( GL_TRIANGLES );
// Top rectangles
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( -0.3f, 0.3f, 0.3f ); // 1
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( 0.3f, 0.3f, 0.3f ); // 2
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( 0.3f, 0.3f, -0.3f ); // 3
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( -0.3f, 0.3f, 0.3f ); // 11
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( 0.3f, 0.3f, -0.3f ); // 22
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( -0.3f, 0.3f, -0.3f ); // 33
// Bottom rectangles
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( -0.3f, -0.3f, -0.3f ); // 1
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( 0.3f, -0.3f, -0.3f ); // 2
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( 0.3f, -0.3f, 0.3f ); // 3
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( -0.3f, -0.3f, -0.3f ); // 11
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( 0.3f, -0.3f, 0.3f ); // 22
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( -0.3f, -0.3f, 0.3f ); // 33
// Back rectangles
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( -0.3f, 0.3f, -0.3f ); // 1
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( 0.3f, 0.3f, -0.3f ); // 2
glColor3f( 1.0f, 0.0f, 1.0f );
glVertex3f( 0.3f, -0.3f, -0.3f ); // 3
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( -0.3f, 0.3f, -0.3f ); // 11
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( 0.3f, -0.3f, -0.3f ); // 22
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( -0.3f, -0.3f, -0.3f ); // 33
// Front rectangles
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( 0.3f, 0.3f, 0.3f ); // 1
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( -0.3f, 0.3f, 0.3f ); // 2
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( -0.3f, -0.3f, 0.3f ); // 3
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( 0.3f, 0.3f, 0.3f ); // 11
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( -0.3f, -0.3f, 0.3f ); // 22
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( 0.3f, -0.3f, 0.3f ); // 33
// Left rectangles
glColor3f( 0.0f, 1.0f, 1.0f );
glVertex3f( -0.3f, 0.3f, 0.3f ); // 1
glVertex3f( -0.3f, 0.3f, -0.3f ); // 2
glVertex3f( -0.3f, -0.3f, -0.3f ); // 3
glVertex3f( -0.3f, 0.3f, 0.3f ); // 11
glVertex3f( -0.3f, -0.3f, -0.3f ); // 22
glVertex3f( -0.3f, -0.3f, 0.3f ); // 33
// Right rectangles
glColor3f( 1.0f, 0.0f, 1.0f );
glVertex3f( 0.3f, 0.3f, -0.3f ); // 1
glVertex3f( 0.3f, 0.3f, 0.3f ); // 2
glVertex3f( 0.3f, -0.3f, 0.3f ); // 3
glVertex3f( 0.3f, 0.3f, -0.3f ); // 11
glVertex3f( 0.3f, -0.3f, 0.3f ); // 22
glVertex3f( 0.3f, -0.3f, -0.3f ); // 33
glEnd();
SwapBuffers( hDC );
}
 
QueryPerformanceCounter((LARGE_INTEGER*)(&llTime2));g_fTimeDiff = ((float)llTime2 - (float)llTime1) / (float)llFrequency; 
g_fTimeElapsed += g_fTimeDiff;
theta += 90.0f * g_fTimeDiff;
}
 
// shutdown OpenGL
DisableOpenGL( hWnd, hDC, hRC );
 
// destroy the window explicitly
DestroyWindow( hWnd );
 return msg.wParam; 
}
// Window Procedure
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{int x, y;switch (message) 
{ 
case WM_CREATE:return 0;case WM_SIZE: 
y = (lParam & 0xFFFF0000) >> 16;
x = (lParam & 0x0000FFFF);
glViewport(0, 0, x/2, y/2);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0, 800.0/600.0, 0.0, 0.0);return 0;case WM_CLOSE: 
PostQuitMessage( 0 );
return 0; case WM_DESTROY: 
return 0;case WM_KEYDOWN:switch ( wParam ) 
{case VK_ESCAPE: 
PostQuitMessage(0);return 0; 
}
return 0;default:return DefWindowProc( hWnd, message, wParam, lParam ); 
}
}
// Enable OpenGLvoid EnableOpenGL(HWND hWnd, HDC * hDC, HGLRC * hRC) 
{
PIXELFORMATDESCRIPTOR pfd;int format; 
 
// get the device context (DC)
*hDC = GetDC( hWnd );
 
// set the pixel format for the DCZeroMemory( &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 = 24;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
format = ChoosePixelFormat( *hDC, &pfd );
SetPixelFormat( *hDC, format, &pfd );
 
// create and enable the render context (RC)
*hRC = wglCreateContext( *hDC );
wglMakeCurrent( *hDC, *hRC );
}
// Disable OpenGLvoid DisableOpenGL(HWND hWnd, HDC hDC, HGLRC hRC) 
{
wglMakeCurrent( NULL, NULL );
wglDeleteContext( hRC );
ReleaseDC( hWnd, hDC );
}