com.almasb.fxgl.physics.box2d.collision.shapes

Class CircleShape

java.lang.Object

com.almasb.fxgl.physics.box2d.collision.shapes.Shape

com.almasb.fxgl.physics.box2d.collision.shapes.CircleShape

public final class CircleShape
extends Shape

A circle shape.

Field Summary

Fields

Modifier and Type	Field and Description
Vec2	m_p

Constructor Summary

Constructors

Constructor and Description
CircleShape()

Method Summary

Modifier and Type	Method and Description
Shape	clone()
void	computeAABB(AABB aabb, Transform transform, int childIndex) Given a transform, compute the associated axis aligned bounding box for a child shape.
float	computeDistanceToOut(Transform xf, Vec2 p, int childIndex, Vec2 normalOut) Compute the distance from the current shape to the specified point.
void	computeMass(MassData massData, float density) Compute the mass properties of this shape using its dimensions and density.
int	getChildCount()
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.
boolean	raycast(RayCastOutput output, RayCastInput input, Transform transform, int childIndex) Cast a ray against a child shape.
boolean	testPoint(Transform transform, Vec2 p) Test a point for containment in this shape.

Methods inherited from class com.almasb.fxgl.physics.box2d.collision.shapes.Shape

getRadius, getType, setRadius

Methods inherited from class java.lang.Object

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

Field Detail

m_p

public final Vec2 m_p

Constructor Detail

CircleShape

public CircleShape()

Method Detail

clone

public Shape clone()

Specified by:

clone in class Shape

getChildCount

public int getChildCount()

Specified by:

getChildCount in class Shape

Returns:

the number of child primitives

testPoint

public boolean testPoint(Transform transform,
                         Vec2 p)

Description copied from class: Shape

Test a point for containment in this shape. This only works for convex shapes.

Specified by:

testPoint in class Shape

Parameters:

transform - the shape world transform.

p - a point in world coordinates.

computeDistanceToOut

public float computeDistanceToOut(Transform xf,
                                  Vec2 p,
                                  int childIndex,
                                  Vec2 normalOut)

Description copied from class: Shape

Compute the distance from the current shape to the specified point. This only works for convex shapes.

Specified by:

computeDistanceToOut in class Shape

Parameters:

xf - the shape world transform.

p - a point in world coordinates.

normalOut - returns the direction in which the distance increases.

Returns:

the distance from the current shape.

raycast

public boolean raycast(RayCastOutput output,
                       RayCastInput input,
                       Transform transform,
                       int childIndex)

Description copied from class: Shape

Cast a ray against a child shape.

Specified by:

raycast in class Shape

Parameters:

output - the ray-cast results.

input - the ray-cast input parameters.

transform - the transform to be applied to the shape.

childIndex - the child shape index

Returns:

if hit

computeAABB

public void computeAABB(AABB aabb,
                        Transform transform,
                        int childIndex)

Description copied from class: Shape

Given a transform, compute the associated axis aligned bounding box for a child shape.

Specified by:

computeAABB in class Shape

Parameters:

aabb - returns the axis aligned box

transform - the world transform of the shape

childIndex - the child shape index

computeMass

public void computeMass(MassData massData,
                        float density)

Description copied from class: Shape

Compute the mass properties of this shape using its dimensions and density. The inertia tensor is computed about the local origin.

Specified by:

computeMass in class Shape

Parameters:

massData - returns the mass data for this shape.

density - the density in kilograms per meter squared.

getSupport

public int getSupport(Vec2 d)

Get the supporting vertex index in the given direction.

Parameters:

d -

Returns:

getSupportVertex

public Vec2 getSupportVertex(Vec2 d)

Get the supporting vertex in the given direction.

Parameters:

d -

Returns:

getVertexCount

public int getVertexCount()

Get the vertex count.

Returns:

getVertex

public Vec2 getVertex(int index)

Get a vertex by index.

Parameters:

index -

Returns: