Collision bounce angle.

• Oct 12th 2009, 07:36 PM
fusionpixel
Collision bounce angle.
What is the proper way to convert a angle correctly when bouncing out of a circular area?

I am able to get the bounce angle of a flat surface by reversing the angle but when you hit a circular area it has been more of a challenge. Could some one recommend some website/tutorial where I can find more information about this issue?
• Oct 13th 2009, 01:47 AM
Hello fusionpixel

Welcome to Math Help Forum!
Quote:

Originally Posted by fusionpixel
What is the proper way to convert a angle correctly when bouncing out of a circular area?

I am able to get the bounce angle of a flat surface by reversing the angle but when you hit a circular area it has been more of a challenge. Could some one recommend some website/tutorial where I can find more information about this issue?

It's very straightforward: draw the tangent to the circle at the point of contact, and treat the bounce as if the ball had hit the (straight line) tangent instead.

• Oct 13th 2009, 03:11 AM
aidan
Quote:

Originally Posted by fusionpixel
What is the proper way to convert a angle correctly when bouncing out of a circular area?

I am able to get the bounce angle of a flat surface by reversing the angle but when you hit a circular area it has been more of a challenge. Could some one recommend some website/tutorial where I can find more information about this issue?

Bouncing off a circular surface, concave or convex is treated in a similar manner.
You need to know the center of the circle, radius & point of contact.
Google for ray tracing. [Google is now a verb?]
This is one result:Curved mirror - Wikipedia, the free encyclopedia
• Oct 13th 2009, 05:48 AM