Type Parameters:

T - the CollisionBody type

E - the Fixture type

All Superinterfaces:

WorldEventListener

All Known Implementing Classes:

CollisionListenerAdapter
```
public interface CollisionListener<T extends CollisionBody<E>,E extends Fixture>
extends WorldEventListener
```
Interface to listen for collision events.
Events for a pair of bodies (as long as they pass the criteria for the event to be called) will be called in the following order:
1. Collision detected by the broadphase: collision(BroadphaseCollisionData)
2. Collision detected by the narrowphase: collision(NarrowphaseCollisionData)
3. Contact manifold created by the manifold solver:collision(ManifoldCollisionData)
Returning false from any of the listener methods will halt processing of that event. Other CollisionListeners will still be notified of that event, but subsequent events will not occur (this indicates that you didn't want the collision to be resolved later).
Since:

1.0.0

Version:

4.0.0

Author:

William Bittle

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`collision(BroadphaseCollisionData<T,E> collision)`	Called when two `Fixture`s are colliding as determined by the `BroadphaseDetector`.
`boolean`	`collision(ManifoldCollisionData<T,E> collision)`	Called when two `Fixture`s are colliding and a contact `Manifold` has been found.
`boolean`	`collision(NarrowphaseCollisionData<T,E> collision)`	Called when two `Fixture`s are colliding as determined by the `NarrowphaseDetector`.

- Method Detail
  - collision
```
boolean collision(BroadphaseCollisionData<T,E> collision)
```
    Called when two Fixtures are colliding as determined by the BroadphaseDetector.
    CollisionBody objects can have many Convex Shapes that make up their geometry. Because of this, this method may be called multiple times if two multi-fixtured CollisionBodys are colliding.
    This method is called when the two Fixture's expanded AABBs are overlapping. Visually the bodies may not appear to be colliding (which is a valid case). If you need to make sure the CollisionBodys are colliding, and not just their AABBs, use the collision(NarrowphaseCollisionData) method.
    Return false from this method to stop processing of this collision. Other CollisionListeners will still be notified of this event, however, no further collision or contact events will occur for this pair.
    The collision(NarrowphaseCollisionData) method is next in the sequence of collision events.
    
    Parameters:
    
    collision - the broadphase collision data
    
    Returns:
    
    boolean true if processing should continue for this collision
    
    Since:
    
    3.2.0
  - collision
```
boolean collision(NarrowphaseCollisionData<T,E> collision)
```
    Called when two Fixtures are colliding as determined by the NarrowphaseDetector.
    CollisionBody objects can have many Convex Shapes that make up their geometry. Because of this, this method may be called multiple times if two multi-fixtured CollisionBodys are colliding.
    Return false from this method to stop processing of this collision. Other CollisionListeners will still be notified of this event, however, no further collision or contact events will occur for this pair.
    The collision(ManifoldCollisionData) method is next in the sequence of collision events.
    
    Parameters:
    
    collision - the narrowphase collision data
    
    Returns:
    
    boolean true if processing should continue for this collision
  - collision
```
boolean collision(ManifoldCollisionData<T,E> collision)
```
    Called when two Fixtures are colliding and a contact Manifold has been found.
    CollisionBody objects can have many Convex Shapes that make up their geometry. Because of this, this method may be called multiple times if two multi-fixtured CollisionBodys are colliding.
    Modification of the Manifold object is allowed. The Manifold is used to create contact constraints.
    Return false from this method to stop processing of this collision. Other CollisionListeners will still be notified of this event, however, no further collision or contact events will occur for this pair.
    
    Parameters:
    
    collision - the manifold collision data
    
    Returns:
    
    boolean true if processing should continue for this collision

Interface CollisionListener<T extends CollisionBody<E>,​E extends Fixture>

Method Summary

Method Detail

collision

collision

collision

Interface CollisionListener<T extends CollisionBody<E>,E extends Fixture>