Collision Detection

[CyberCarsten]

Hi all...

I'm prorgramming a breakout/paddle game and its comming together nicely, but now I have gotten to the Collision Detection(when the ball hits the blocks)...

I create objects(BOB's) using my engine which has a lot of wrapper functions, fx Collison_BOBS:

int Collision_BOBS(BOB_PTR bob1,     // Pointer to first BOB
                              BOB_PTR bob2);   // Pointer to second BOB 

The function returns TRUE is the two bounding rectangles overlap.

So i have tried to make for loop to check whenever the ball BOB hits the box[28] BOB, but my machine hanged....

I have also tried to do it manually like this

if(Collision_BOBS(&ball, &box[1])){
      ......
} 

etc.....

Hanged again....anyone have any ideas....my main game loop look like this:

int Game_Main(void *parms)
{

// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE))
    PostMessage(main_window_handle, WM_DESTROY,0,0);
if (KEY_DOWN(VK_LEFT)) {
    if (paddle.x >5) {
        paddle.x = paddle.x -10;
        Move_BOB(&paddle);
    }
} else if(KEY_DOWN(VK_RIGHT)) {
    if(paddle.x + paddle.width  < SCREEN_WIDTH) {
        paddle.x = paddle.x +10;
        Move_BOB(&paddle);
    }
}

// start the timing clock
Start_Clock();

// clear the drawing surface
DD_Fill_Surface(lpddsback, 0);

Draw_BOB(&paddle,lpddsback);
Draw_BOB(&ball,lpddsback);
for (int draw = 0; draw<28; draw++)
Draw_BOB(&box[draw],lpddsback);

ball.xv = xangle;
ball.yv = yangle;
Move_BOB(&ball);

//the ball has gone outside the screen
if(ball.x <= 0 | ball.x >= SCREEN_WIDTH - ball.width ){
    xangle = -xangle;
}
// the ball has gone outside the screen
if(ball.y <= 0 |ball.y == SCREEN_HEIGHT - ball.height){
    yangle = -yangle;
}
// the ball has hit the paddle
if(Collision_BOBS(&ball,&paddle)){
    yangle=-yangle; // change direction
}



// flip the surfaces
DD_Flip();


// sync to 30ish fps
Wait_Clock(30);

// return success
return(1);

} // end Game_Main 

please let me know if you need more source code...
Thanks in advance!