Bouncing Balls

[SteveCRM]

I can make a ball bounce around the screen, but how would i make it bounce of of objects, such as other images?

Thanx

Steve

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[Darkwraith]

NOTE: This is only for X direction:

(Image1.left + width) <= Image2.left for a right collision
(Image1.left) <= (Image2.left + width) for a left collision

Its basically the same in the Y direction.

[SLH]

I think i have a project that might help.... i'll see if i can fish it out...

[SLH]

Found it - it's by no means perfect, but it should give you a start.

Add a form with some shapes on it called shape (index them).

I also experimented with curves, but that was never finished so i commented it out.

Have to attach the file - too long to post.

[Darkwraith]

if you are trying to do circular collision regions, then

Center(Image1)^2 + Center(Image2)^2 >= (Image1.Radius + Image2.Radius)^2

would define a collision. Center() would give you the X or Y coordinate of the center of the object.

Sorry this is all in pseudocode but it should be enough. :)

[SLH]

Originally posted by Darkwraith
if you are trying to do circular collision regions...


No, i can do that fine (see attached), it was getting the ball to bounce realistically off the surfaces of convex and concave curves that was the hard part. I just couldn't get my head around the mathmatics of it all.

Thanks for the help though. :)

[SLH]

DOh, forgot to attach the file - and i cant edit the previous post to include it either, ah well, here it is.

[SteveCRM]

damn guys....this is from 1999! :eek: I haven't used vb in over 2-3 years :p

[SLH]

LOL :o

At least i wasn't the one to resurrect it. :D

[Electroman]

Darkwraith strikes again, thats two in about 2-3days you've brought threads back from the past, I think I'll have a go at it soon:D:D.

The other one (http://www.vbforums.com/showthread.php?s=&threadid=15601):D

[Darkwraith]

:D

But now we have a thread on collision regions. :)