Hi

I am doing a pool simulator (billiard) and have found a problem im not sure of how it works in real life. When 2 balls collide they impart rotation onto each other ( this i have tested my self and found true ) but im confused as to how much? i can work out the tangential velocities of the balls at the point they collide and this i guess combined with some coefficient of friction would do the trick, but is this how it works? is friction dependant on velocity?

sorry if confusingly explained and for the english.

Hi there,

There ae already a few tutorials covering this topic. Here are a few good ones found by googling "pool physics"
I've implemented some of these myself, and it works just fine!

http://www.gamasutra.com/view/feature/3168/physics_on_the_back_of_a_cocktail_.php
http://archive.ncsa.illinois.edu/Classes/MATH198/townsend/math.html
http://www.real-world-physics-problems.com/physics-of-billiards.html

Cheers,
Mike

thank you H4tt3n. I have read your links and they were indeed helpfull, especially nr 2 wich covered the issue i asked.
thank you!