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 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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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 Detail

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 Detail
- Distance
```
public Distance()
```

Method Detail
- 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 -