# Reaction -after collision- ball path predicte

**URL:** <https://forum.kirupa.com/t/reaction-after-collision-ball-path-predicte/245855>\
**Category:** Uncategorized\
**Created:** [December 4, 2007, 9:20pm UTC](https://forum.kirupa.com/t/reaction-after-collision-ball-path-predicte/245855 "2007-12-04T21:20:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![booboo](https://avatars.discourse-cdn.com/v4/letter/b/9de053/32.png) [@booboo](https://forum.kirupa.com/u/booboo)\
**Post date:** [December 4, 2007, 9:20pm UTC](https://forum.kirupa.com/t/reaction-after-collision-ball-path-predicte/245855/1 "2007-12-04T21:20:51Z")

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hello, I am making a billard game, I already have almost everything, I would like to know how to calculate these two line (A and B), please look at the picture:

[http://img228.imageshack.us/img228/8207/balyk3.jpg](http://img228.imageshack.us/img228/8207/balyk3.jpg)

thanx