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C-/C++-Quelltext

// Vektor für Positionen


struct poszeiger {
    float xPos;
    float yPos;
};

// Klasse des Balles


class gameball
{
private:
    DWORD time;
    DWORD now;
    int speed;
public:
    poszeiger ball;
    void init ();
    int move ();
};

// Startwerte setzen


void gameball::init ()
{
    time = timeGetTime ();
    speed = 100;
    ball.xPos = 170;
    ball.yPos = 200;
}

// Ball bewegen (noch nicht komplett)


int gameball::move()
{
    DWORD tick;
    now = timeGetTime ();
    tick = (now-time)*speed;
    ball.xPos = static_cast<float>(ball.xPos + tick);
    ball.yPos = static_cast<float>(ball.yPos + tick);
    return 1;
}

// Instanz der Klasse gameball


gameball rball;

// Klasse des Spiels


class ppb
{
private:
    int points;
    void init ();
    int speed;
    DWORD time;
public:
    void reset_timer () {time = timeGetTime ();}
    void faster () {speed += 50;}
    void slower () {if (speed > 50) speed -= 50;}
    int game_run;
    void start ();
    void display ();
};

void ppb::init ()
{
    game_run = 0;
    points = 0;
}

void ppb::start ()
{
    reset_timer ();
    speed = 100;
    init ();
    game_run = 1;
}

void ppb::display ()
{
    ppb_display.backgrnd ();
    ppb_display.gplayer1 ();
    ppb_display.gball ();
    ppb_display.present ();
}

// Instanz der Spielerklasse


ppb game;

// Ausschnitt WinMain


[...]


    while( TRUE)
        {
        if( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE))
            {
            if( GetMessage( &msg, NULL, 0, 0 ) == 0)
                return 0; // Message ist WM_QUIT


             if( TranslateAccelerator( ppb_window, acc, &msg) == 0)
                {
                TranslateMessage( &msg); 
                DispatchMessage( &msg);
                }
            }
        else
        {
            HRESULT hr;
            hr = ppb_display.cooperative ();
            if (hr < 0)
            {
                switch (hr)
                {
                case DDERR_EXCLUSIVEMODEALREADYSET:
                    Sleep(10);
                    break;
                case DDERR_WRONGMODE:
                    ppb_display.free_all ();
                    ppb_display.init (ppb_window);
                    PostMessage (ppb_window, WM_PAINT, 0, 0);
                    break;
                
                    if (game.game_run)
                    {
                        if (rball.move ());
                            game.display ();
                    }
                    else
                    {
                        WaitMessage ();
                        game.reset_timer ();
                    }
                }
            }
        }
    
        }
    }

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C-/C++-Quelltext

int gameball::move()
{
    curtime = timeGetTime ();
    curtime /= 1000;

    elapsedtime = curtime-lasttime;
    lasttime = curtime;
    xPos = GetxPos ();
    yPos = GetyPos ();

    if (xPos <= 0)
        hitx = LEFT;
    if (xPos >= 735)
        hitx = RIGHT;
    if (yPos <= 0)
        hity = UP;
    if (yPos >= 399)
        hity = DOWN;

    switch (hitx)
    {
    case LEFT:
        incdecx = 1;
        break;
    case RIGHT:
        incdecx = -1;
        break;
    };

    switch (hity)
    {
    case UP:
        incdecy = 1;
        break;
    case DOWN:
        incdecy = -1;
    };

    Setpos (xPos + ((incdecx*speed)*elapsedtime), yPos + ((incdecy*speed)*elapsedtime));

    return 1;
}

C-/C++-Quelltext

        HRESULT hr;
        hr = ppb_display.cooperative ();
        if (hr < 0)
            {
                switch (hr)
                {
                case DDERR_EXCLUSIVEMODEALREADYSET:
                    Sleep(10);
                    break;
                case DDERR_WRONGMODE:
                    ppb_display.free_all ();
                    ppb_display.init (ppb_window);
                    PostMessage (ppb_window, WM_PAINT, 0, 0);
                    break;
                }
            }
            else
            {
                if (game.game_run)
                {
                    if (rball.move ())
                        game.display ();
                }
                else
                {
                    WaitMessage ();
                    rball.reset_timer ();
                }
            }