org.jbox2d.collision
Class Distance.DistanceProxy

java.lang.Object
  org.jbox2d.collision.Distance.DistanceProxy

Enclosing class:

Distance

public static class Distance.DistanceProxy
extends Object

A distance proxy is used by the GJK algorithm. It encapsulates any shape. TODO: see if we can just do assignments with m_vertices, instead of copying stuff over

Author:

daniel

Field Summary

Vec2[]	m_buffer
int	m_count
float	m_radius
Vec2[]	m_vertices

Constructor Summary

Distance.DistanceProxy()

Method Summary

int	getSupport(Vec2 d) Get the supporting vertex index in the given direction.
Vec2	getSupportVertex(Vec2 d) Get the supporting vertex in the given direction.
Vec2	getVertex(int index) Get a vertex by index.
int	getVertexCount() Get the vertex count.
void	set(Shape shape, int index) Initialize the proxy using the given shape.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

m_vertices

public final Vec2[] m_vertices

m_count

public int m_count

m_radius

public float m_radius

m_buffer

public final Vec2[] m_buffer

Constructor Detail

Distance.DistanceProxy

public Distance.DistanceProxy()

Method Detail

set

public final void set(Shape shape,
                      int index)

Initialize the proxy using the given shape. The shape must remain in scope while the proxy is in use.

getSupport

public final int getSupport(Vec2 d)

Get the supporting vertex index in the given direction.

Parameters:

d -

Returns:

getSupportVertex

public final Vec2 getSupportVertex(Vec2 d)

Get the supporting vertex in the given direction.

Parameters:

d -

Returns:

getVertexCount

public final int getVertexCount()

Get the vertex count.

Returns:

getVertex

public final Vec2 getVertex(int index)

Get a vertex by index. Used by Distance.

Parameters:

index -

Returns: