Simple physics problem

I''m not sure what you''re finished with, but here''s a little clue:

If two balls are colliding, and you want proper collision response, you should now their radiuses (radii perhaps?), their masses, their ability to bounce etc. Let''s skip some of it

Are the balls equal in size etc? In that case, a collision has taken place when the distance between the balls is 2r (r being the radius of one ball).
If you find a collision, get a vector between the center of the balls. Create a vector perpendicular to the last vector, and mirror the direction of the balls around this perpendicular vector. These are the new directions.

About the velocity:
Just lower it somehow. If the velocities before the collision is 1, it might be 0.8 or something afterwards as a first test.

I''m have no idea about how the energy is distributed among the 2 steel balls after a collision but you will probably need this equation somewhen:
M1V1+M2V2 = M1U1+M2U2

M1 - Mass of the first ball

V1 - Velocity of first ball before the collision.
U1 - Velocity of first ball after the collision.

It probably doesn''t help you much since it can be found in almost every physics book concerning collisions but that''s all I know about this issue.

I believe there was an article over on gamasutra about collisions between balls (err, I just checked - the article is here).

And check this thread. It''s about almost exactly the same problem.

And don''t forget to check the reference section of GameDev.

John B

Thanks, I saw that post right after I posted my question.

This is a good one:

http://www20.brinkster.com/ahab/tutorials/tdcollphys.htm

Thanks, that site has exactly what I need.