com.almasb.fxgl.physics.box2d.collision

Class AABB

java.lang.Object

com.almasb.fxgl.physics.box2d.collision.AABB

public final class AABB
extends Object

An axis-aligned bounding box.

Field Summary

Fields

Modifier and Type	Field and Description
Vec2	lowerBound Bottom left vertex of bounding box.
Vec2	upperBound Top right vertex of bounding box.

Constructor Summary

Constructors

Constructor and Description
AABB() Creates the default object, with vertices at 0,0 and 0,0.
AABB(AABB copy) Copies from the given object.
AABB(Vec2 lowerVertex, Vec2 upperVertex) Creates an AABB object using the given bounding vertices.

Method Summary

Modifier and Type	Method and Description
void	combine(AABB aabb) Combines another aabb with this one.
void	combine(AABB aabb1, AABB aabb2) Combine two AABBs into this one.
boolean	contains(AABB aabb)
Vec2	getCenter()
Vec2	getExtents()
float	getPerimeter()
boolean	isValid()
boolean	raycast(RayCastOutput output, RayCastInput input, IWorldPool argPool) From Real-time Collision Detection, p179.
void	set(AABB aabb) Sets this object from the given object.
static boolean	testOverlap(AABB a, AABB b)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

lowerBound

public final Vec2 lowerBound

Bottom left vertex of bounding box.

upperBound

public final Vec2 upperBound

Top right vertex of bounding box.

Constructor Detail

AABB

public AABB()

Creates the default object, with vertices at 0,0 and 0,0.

AABB

public AABB(AABB copy)

Copies from the given object.

Parameters:

copy - the object to copy from

AABB

public AABB(Vec2 lowerVertex,
            Vec2 upperVertex)

Creates an AABB object using the given bounding vertices.

Parameters:

lowerVertex - the bottom left vertex of the bounding box

upperVertex - the top right vertex of the bounding box

Method Detail

set

public void set(AABB aabb)

Sets this object from the given object.

Parameters:

aabb - the object to copy from

isValid

public boolean isValid()

Returns:

true if the bounds are sorted (upper x and y are greater than lower x and y)

getCenter

public Vec2 getCenter()

Returns:

the center of the AABB

getExtents

public Vec2 getExtents()

Returns:

the extents of the AABB (half-widths)

getPerimeter

public float getPerimeter()

Returns:

the perimeter length

combine

public void combine(AABB aabb1,
                    AABB aabb2)

Combine two AABBs into this one.

combine

public void combine(AABB aabb)

Combines another aabb with this one.

contains

public boolean contains(AABB aabb)

Returns:

true if this aabb contain the provided AABB

raycast

public boolean raycast(RayCastOutput output,
                       RayCastInput input,
                       IWorldPool argPool)

From Real-time Collision Detection, p179.

testOverlap

public static boolean testOverlap(AABB a,
                                  AABB b)

toString

public final String toString()

Overrides:

toString in class Object