# CollideAgainstBounce

### Introduction

The CollideAgainstBounce is a collision method which performs the following:

* Returns true if a collision has occurred.
* Repositions the calling Circle and/or the argument object depending on the argument masses.
* Changes the calling Shape's Velocity and/or the argument object's Velocity depending on the argument masses.

For more information see the [Circle CollideAgainstBounce page](https://docs.flatredball.com/flatredball/api/flatredball/math/geometry/circle/collideagainstbounce).