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Collision response

Started by Shiftytitan Dec 15, 2002 at 2:41 AM 0 replies 900+ views

Original Post

Dec 15, 2002 at 2:41 AM

Hi, i am confused, and stupid. how do i do a good collision response. I want to change the direction of a sphere, when it collides with a polygon. I already know how to change the colour, for, when a collison occurs.

Gee

Dec 15, 2002 at 8:10 AM

Well, let''s call the triangle''s (the collision polygon) normal n. The velocity of the sphere v1, and the velocity after the impact v2.

The new velocity (v2) we will get through:

v2 . n = -ev1 . n

e is the coefficient of restitution, 1 if you want the ball to completely bounce, and 0 if you want it to stick to the wall.

The dots represent the dot product, there is a lot of good articles on it here at Gamedev...

I hope it gets you started... cheers

/Gee .

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