Breakout help?!

[Jason21m]

I am trying to get a ball to bounce off of a few things. As of now I have the ball bouncing off of the sides and bottom of the form. One question I have is
Can anyone tell me how to get the ball to stop from going off of the top of the screen? It gets to the title bar and then disappears. The second one is how do I get the ball to bounce off of the paddle? Any help will be greatl appreciated.

[Dude1]

Try this, it works for me every time. You can use this to make the ball bounce off of the paddles AND prevent it from going off the screen. I assume that you know how I got the ball.x and ball.y,
I just used a Public Type.

picball- is the picturebox on your form
paddle - is the paddle picturebox on your form.

If ball.x + picball.Width >= Paddle.Left And ball.x <= Paddle.Left + Paddle.Width And ball.y + picball.Height >= Paddle.Top And ball.y <= Paddle.Top + Paddle.Height Then ball.y = ball.y - 5

"ball.y = ball.y - 5" change this to ball.x= ball.x - 5 if your game is horizontal.


Hope this helps.

[NOMADMAN]

I recommend API if you're comfortable with it.

There is a command IntersectRect that can be called. This is very fast and very effective.

Declare Function IntersectRect Lib "user32" Alias "IntersectRect" _
 (lpDestRect As RECT, lpSrc1Rect As RECT, lpSrc2Rect As RECT) As Long
 
Type RECT
     Left as Long
     Top as Long
     Right as Long
     Bottom as Long
End Type

Now use a line similar to this to see if the two intersect:

If IntersectRect(TEMPRECT, BALLRECT, PADDLERECT) <> 0 Then
     'RUN COLLISION CODE
End If

You must declare all those varible in the finction call as RECT. And to set values to both the ball and the paddle you do something like this:

With BALLRECT
     .Left = 50
     .Right = .Left + 10
     .Top = 50
     .Bottom = .Top + 10     'HEIGHT OF BALL
End With
 
With PADDLERECT
     .Left = 150
     .Right = .Left + 100     'WIDTH OF PADDLE
     .Top = 50
     .Bottom = .Top + 50
End With

All those numbers are of coarse arbitrary, so do what you must. This explanation is pretty over simplified, but if you have any questions ask'em away!

NOMAD