# Box2D/Box2D/Collision/b2BroadPhase.h File Reference

`#include <Box2D/Common/b2Settings.h>`
`#include <Box2D/Collision/b2Collision.h>`
`#include <Box2D/Collision/b2DynamicTree.h>`
`#include <algorithm>`

Go to the source code of this file.

## Classes
struct | b2Pair
class | b2BroadPhase
## Functions
bool | b2PairLessThan (const b2Pair &pair1, const b2Pair &pair2)
| This is used to sort pairs.

## Function Documentation

bool b2PairLessThan | ( | const b2Pair & | pair1,
|  | const b2Pair & | pair2 |
| ) |  |  | `[inline]`

This is used to sort pairs.