Box2D.Dynamics.b2ContactListener
Class b2ContactListener
Namespace: Box2D.Dynamics
Assembly: Box2D.dll, box2d.iOS.dll
Implement this class to get contact information. You can use these results for things like sounds and game logic. You can also get contact results by traversing the contact lists after the time step. However, you might miss some contacts because continuous physics leads to sub-stepping. Additionally you may receive multiple callbacks for the same contact in a single time step. You should strive to make your callbacks efficient because there may be many callbacks per time step. @warning You cannot create/destroy Box2D entities inside these callbacks. ///
public abstract class b2ContactListener
Inheritance
Inherited Members
object.GetType(), object.MemberwiseClone(), object.ToString(), object.Equals(object?), object.Equals(object?, object?), object.ReferenceEquals(object?, object?), object.GetHashCode()
Constructors
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
b2ContactListener()
protected b2ContactListener()
Fields
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
b2_defaultListener
public static b2ContactListener b2_defaultListener
Field Value
Methods
BeginContact(b2Contact)
Called when two fixtures begin to touch.
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
Called when two fixtures begin to touch.
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
BeginContact(b2Contact)
public virtual void BeginContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
Called when two fixtures cease to touch.
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
Called when two fixtures cease to touch.
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
EndContact(b2Contact)
public virtual void EndContact(b2Contact contact)
Parameters
contact b2Contact
PostSolve(b2Contact, ref b2ContactImpulse)
This lets you inspect a contact after the solver is finished. This is useful for inspecting impulses. Note: the contact manifold does not include time of impact impulses, which can be arbitrarily large if the sub-step is small. Hence the impulse is provided explicitly in a separate data structure. Note: this is only called for contacts that are touching, solid, and awake.
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
This lets you inspect a contact after the solver is finished. This is useful for inspecting impulses. Note: the contact manifold does not include time of impact impulses, which can be arbitrarily large if the sub-step is small. Hence the impulse is provided explicitly in a separate data structure. Note: this is only called for contacts that are touching, solid, and awake.
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PostSolve(b2Contact, ref b2ContactImpulse)
public abstract void PostSolve(b2Contact contact, ref b2ContactImpulse impulse)
Parameters
contact b2Contact
impulse b2ContactImpulse
PreSolve(b2Contact, b2Manifold)
This is called after a contact is updated. This allows you to inspect a contact before it goes to the solver. If you are careful, you can modify the contact manifold (e.g. disable contact). A copy of the old manifold is provided so that you can detect changes. Note: this is called only for awake bodies. Note: this is called even when the number of contact points is zero. Note: this is not called for sensors. Note: if you set the number of contact points to zero, you will not get an EndContact callback. However, you may get a BeginContact callback the next step.
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
This is called after a contact is updated. This allows you to inspect a contact before it goes to the solver. If you are careful, you can modify the contact manifold (e.g. disable contact). A copy of the old manifold is provided so that you can detect changes. Note: this is called only for awake bodies. Note: this is called even when the number of contact points is zero. Note: this is not called for sensors. Note: if you set the number of contact points to zero, you will not get an EndContact callback. However, you may get a BeginContact callback the next step.
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold
PreSolve(b2Contact, b2Manifold)
public abstract void PreSolve(b2Contact contact, b2Manifold oldManifold)
Parameters
contact b2Contact
oldManifold b2Manifold