Module org.dyn4j

Package org.dyn4j.collision.manifold

Class IndexedManifoldPointId

java.lang.Object

org.dyn4j.collision.manifold.IndexedManifoldPointId

All Implemented Interfaces:

ManifoldPointId

public class IndexedManifoldPointId
extends java.lang.Object
implements ManifoldPointId

Represents a ManifoldPointId that uses edge indexing.

The the edge and vertex indicies are the indicies of the edges and verticies in the reference and incident Convex Shapes in the collision.

The flipped flag is set when the default reference edge is swapped to be the incident edge.

For a given Convex Shape the indicies should not change, although there is no mechanism preventing this. In the case they change, this should only affect any caching of this information.

Since:

1.0.0

Version:

3.2.0

Author:

William Bittle

See Also:

ManifoldPointId.DISTANCE

Field Summary

Fields inherited from interface org.dyn4j.collision.manifold.ManifoldPointId

DISTANCE

Constructor Summary

Constructors

Constructor	Description
IndexedManifoldPointId(int referenceEdge, int incidentEdge, int incidentVertex)	Optional constructor.
IndexedManifoldPointId(int referenceEdge, int incidentEdge, int incidentVertex, boolean flipped)	Full constructor.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object other)
int	getIncidentEdge()	Returns the incident edge index of this manifold on the other Shape.
int	getIncidentVertex()	Returns the index of the deepest collision point of the incident edge of this manifold on the other Shape.
int	getReferenceEdge()	Returns the reference edge index of this manifold on the Shape.
int	hashCode()
boolean	isFlipped()	Returns true if the reference edge and incident edges were swapped.
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

IndexedManifoldPointId

public IndexedManifoldPointId(int referenceEdge,
                              int incidentEdge,
                              int incidentVertex)

Optional constructor.

Parameters:

referenceEdge - the reference edge index

incidentEdge - the incident edge index

incidentVertex - the incident vertex index

Since:

3.1.5

IndexedManifoldPointId

public IndexedManifoldPointId(int referenceEdge,
                              int incidentEdge,
                              int incidentVertex,
                              boolean flipped)

Full constructor.

Parameters:

referenceEdge - the reference edge index

incidentEdge - the incident edge index

incidentVertex - the incident vertex index

flipped - whether the reference and incident features flipped

Method Detail

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getReferenceEdge

public int getReferenceEdge()

Returns the reference edge index of this manifold on the Shape.

The reference edge is the edge that is most perpendicular to the collision normal.

Returns:

int

getIncidentEdge

public int getIncidentEdge()

Returns the incident edge index of this manifold on the other Shape.

Returns:

int

getIncidentVertex

public int getIncidentVertex()

Returns the index of the deepest collision point of the incident edge of this manifold on the other Shape.

Returns:

int

isFlipped

public boolean isFlipped()

Returns true if the reference edge and incident edges were swapped.

Returns:

boolean