Class Distance

java.lang.Object

org.jbox2d.collision.Distance

public class Distance
extends java.lang.Object

This is non-static for faster pooling. To get an instance, use the

invalid reference

SingletonPool

, don't construct a distance object.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Distance.DistanceProxy	A distance proxy is used by the GJK algorithm.
private class	Distance.Simplex
static class	Distance.SimplexCache	Used to warm start Distance.
private class	Distance.SimplexVertex	GJK using Voronoi regions (Christer Ericson) and Barycentric coordinates.

Field Summary

Fields

Modifier and Type	Field	Description
private Vec2	closestPoint
private Vec2	d
static int	GJK_CALLS
static int	GJK_ITERS
static int	GJK_MAX_ITERS
private Vec2	normal
private int[]	saveA
private int[]	saveB
private Distance.Simplex	simplex
private Vec2	temp

Constructor Summary

Constructors

Constructor	Description
Distance()

Method Summary

Modifier and Type	Method	Description
final void	distance(DistanceOutput output, Distance.SimplexCache cache, DistanceInput input)	Compute the closest points between two shapes.

Methods inherited from class java.lang.Object

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

Field Details

GJK_CALLS

public static int GJK_CALLS

GJK_ITERS

public static int GJK_ITERS

GJK_MAX_ITERS

public static int GJK_MAX_ITERS

simplex

private Distance.Simplex simplex

saveA

private int[] saveA

saveB

private int[] saveB

closestPoint

private Vec2 closestPoint

d

private Vec2 d

temp

private Vec2 temp

normal

private Vec2 normal

Constructor Details

Distance

public Distance()

Method Details

distance

public final void distance(DistanceOutput output,
 Distance.SimplexCache cache,
 DistanceInput input)

Compute the closest points between two shapes. Supports any combination of: CircleShape and PolygonShape. The simplex cache is input/output. On the first call set SimplexCache.count to zero.

Parameters:

output -

cache -

input -