Laboratoř ČeskýchHer.cz - PasteBin

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#include <cstdlib>
#include <SDL/SDL.h>
 
/* pokus by frca */
 
 
 
float getdeltaT()
 
{
 
    static bool bfirstrun = true;
 
    static double tm_prev;
 
    if (bfirstrun)
 
    {
 
        tm_prev = double(SDL_GetTicks())*0.001;
 
        bfirstrun = false;
 
        return 0.f;
 
    }
 
    double tm_now = double(SDL_GetTicks())*0.001;
 
    double deltaT = tm_now-tm_prev;
 
    tm_prev = tm_now;
 
    if (deltaT < 0.0)
 
        return 0.0;
 
    return deltaT;
 
}
 
int main ( int argc, char** argv )
{
    // initialize SDL video
    if ( SDL_Init( SDL_INIT_VIDEO ) < 0 )
    {
        printf( "Unable to init SDL: %s\n", SDL_GetError() );
        return 1;
    }
 
    // make sure SDL cleans up before exit
    atexit(SDL_Quit);
 
    // create a new window
    SDL_Surface* screen = SDL_SetVideoMode(640, 480, 16,
                                           SDL_HWSURFACE|SDL_DOUBLEBUF);
    if ( !screen )
    {
        printf("Unable to set 640x480 video: %s\n", SDL_GetError());
        return 1;
    }
    
    SDL_Event event;
    
    bool firstdraw = true;
    
    //SDL_EventState(SDL_VIDEOEXPOSE, SDL_ENABLE);
    
    while (SDL_WaitEvent(&event))
    {
        bool done = false;
        bool exposed = false;
        switch (event.type)
        {
            // exit if the window is closed
        case SDL_QUIT:
            done = true;
            break;
            // check for keypresses
        case SDL_KEYDOWN:
            {
                // exit if ESCAPE is pressed
                if (event.key.keysym.sym == SDLK_ESCAPE)
                    done = true;
                break;
            }
        case SDL_VIDEOEXPOSE:
            {
                exposed = true;
                printf("exposed ");
            }              
            break;  
        } // end switch        
        if (done)
            break;
        if (firstdraw) {
            
            // clear screen
            SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 255, 0));
            firstdraw = false;            
            // finally, update the screen :)
            printf("sdl_flip ");
            SDL_Flip(screen);
        }
 
        // DRAWING ENDS HERE
 
        
    }
    // all is well ;)
    return 0;
}