com.almasb.fxgl.physics.box2d.collision

Class Collision

java.lang.Object

com.almasb.fxgl.physics.box2d.collision.Collision

public final class Collision
extends Object

Functions used for computing contact points, distance queries, and TOI queries. Collision methods are non-static for pooling speed, retrieve a collision object from the IWorldPool. Should not be constructed.

Author:

Daniel Murphy

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Collision.ClipVertex Used for computing contact manifolds.

Constructor Summary

Constructors

Constructor and Description
Collision(IWorldPool pool)

Method Summary

Modifier and Type	Method and Description
static int	clipSegmentToLine(Collision.ClipVertex[] vOut, Collision.ClipVertex[] vIn, Vec2 normal, float offset, int vertexIndexA) Clipping for contact manifolds.
void	collideCircles(Manifold manifold, CircleShape circle1, Transform xfA, CircleShape circle2, Transform xfB) Compute the collision manifold between two circles.
void	collideEdgeAndCircle(Manifold manifold, EdgeShape edgeA, Transform xfA, CircleShape circleB, Transform xfB)
void	collideEdgeAndPolygon(Manifold manifold, EdgeShape edgeA, Transform xfA, PolygonShape polygonB, Transform xfB)
void	collidePolygonAndCircle(Manifold manifold, PolygonShape polygon, Transform xfA, CircleShape circle, Transform xfB) Compute the collision manifold between a polygon and a circle.
void	collidePolygons(Manifold manifold, PolygonShape polyA, Transform xfA, PolygonShape polyB, Transform xfB) Compute the collision manifold between two polygons.
void	findIncidentEdge(Collision.ClipVertex[] c, PolygonShape poly1, Transform xf1, int edge1, PolygonShape poly2, Transform xf2)
void	findMaxSeparation(com.almasb.fxgl.physics.box2d.collision.Collision.EdgeResults results, PolygonShape poly1, Transform xf1, PolygonShape poly2, Transform xf2) Find the max separation between poly1 and poly2 using edge normals from poly1.
boolean	testOverlap(Shape shapeA, int indexA, Shape shapeB, int indexB, Transform xfA, Transform xfB) Determine if two generic shapes overlap.

Methods inherited from class java.lang.Object

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

Constructor Detail

Collision

public Collision(IWorldPool pool)

Method Detail

testOverlap

public boolean testOverlap(Shape shapeA,
                           int indexA,
                           Shape shapeB,
                           int indexB,
                           Transform xfA,
                           Transform xfB)

Determine if two generic shapes overlap.

clipSegmentToLine

public static final int clipSegmentToLine(Collision.ClipVertex[] vOut,
                                          Collision.ClipVertex[] vIn,
                                          Vec2 normal,
                                          float offset,
                                          int vertexIndexA)

Clipping for contact manifolds. Sutherland-Hodgman clipping.

collideCircles

public void collideCircles(Manifold manifold,
                           CircleShape circle1,
                           Transform xfA,
                           CircleShape circle2,
                           Transform xfB)

Compute the collision manifold between two circles.

collidePolygonAndCircle

public void collidePolygonAndCircle(Manifold manifold,
                                    PolygonShape polygon,
                                    Transform xfA,
                                    CircleShape circle,
                                    Transform xfB)

Compute the collision manifold between a polygon and a circle.

Parameters:

manifold -

polygon -

xfA -

circle -

xfB -

findIncidentEdge

public void findIncidentEdge(Collision.ClipVertex[] c,
                             PolygonShape poly1,
                             Transform xf1,
                             int edge1,
                             PolygonShape poly2,
                             Transform xf2)

collidePolygons

public void collidePolygons(Manifold manifold,
                            PolygonShape polyA,
                            Transform xfA,
                            PolygonShape polyB,
                            Transform xfB)

Compute the collision manifold between two polygons.

findMaxSeparation

public void findMaxSeparation(com.almasb.fxgl.physics.box2d.collision.Collision.EdgeResults results,
                              PolygonShape poly1,
                              Transform xf1,
                              PolygonShape poly2,
                              Transform xf2)

Find the max separation between poly1 and poly2 using edge normals from poly1.

collideEdgeAndCircle

public void collideEdgeAndCircle(Manifold manifold,
                                 EdgeShape edgeA,
                                 Transform xfA,
                                 CircleShape circleB,
                                 Transform xfB)

collideEdgeAndPolygon

public void collideEdgeAndPolygon(Manifold manifold,
                                  EdgeShape edgeA,
                                  Transform xfA,
                                  PolygonShape polygonB,
                                  Transform xfB)