# b2RayCastCallback Class Reference

`#include <b2WorldCallbacks.h>`

List of all members.

## Public Member Functions
virtual | ~b2RayCastCallback ()
virtual float32 | ReportFixture (b2Fixture *fixture, const b2Vec2 &point, const b2Vec2 &normal, float32 fraction)=0

## Detailed Description

Callback class for ray casts. See b2World::RayCast

## Constructor & Destructor Documentation

virtual b2RayCastCallback::~b2RayCastCallback | ( |  | ) | `[inline, virtual]`

## Member Function Documentation

virtual float32 b2RayCastCallback::ReportFixture | ( | b2Fixture * | fixture,
|  | const b2Vec2 & | point,
|  | const b2Vec2 & | normal,
|  | float32 | fraction |
| ) |  |  | `[pure virtual]`

Called for each fixture found in the query. You control how the ray cast proceeds by returning a float: return -1: ignore this fixture and continue return 0: terminate the ray cast return fraction: clip the ray to this point return 1: don't clip the ray and continue

Parameters:

  | fixture | the fixture hit by the ray
  | point | the point of initial intersection
  | normal | the normal vector at the point of intersection

Returns:
  -1 to filter, 0 to terminate, fraction to clip the ray for closest hit, 1 to continue

The documentation for this class was generated from the following file:

- Box2D/Box2D/Dynamics/b2WorldCallbacks.h