PackageBox2D.Collision.Shapes
Classpublic class b2CircleShape
Inheritanceb2CircleShape Inheritance b2Shape
Sourceb2CircleShape.as

A circle shape.

See also

b2CircleDef

Public Methods
 MethodDefined by
  
ComputeAABB(aabb:b2AABB, transform:b2XForm):void
Given a transform, compute the associated axis aligned bounding box for this shape.
b2CircleShape
  
ComputeMass(massData:b2MassData):void
Compute the mass properties of this shape using its dimensions and density.
b2CircleShape
  
ComputeSweptAABB(aabb:b2AABB, transform1:b2XForm, transform2:b2XForm):void
Given two transforms, compute the associated swept axis aligned bounding box for this shape.
b2CircleShape
 Inherited
GetBody():b2Body
Get the parent body of this shape.
b2Shape
 Inherited
GetFilterData():b2FilterData
Get the contact filtering data.
b2Shape
 Inherited
GetFriction():Number
Get the coefficient of friction.
b2Shape
  
GetLocalPosition():b2Vec2
Get the local position of this circle in its parent body.
b2CircleShape
 Inherited
GetNext():b2Shape
Get the next shape in the parent body's shape list.
b2Shape
  
GetRadius():Number
Get the radius of this circle.
b2CircleShape
 Inherited
GetRestitution():Number
Get the coefficient of restitution.
b2Shape
 Inherited
GetSweepRadius():Number
Get the maximum radius about the parent body's center of mass.
b2Shape
 Inherited
GetType():int
Get the type of this shape.
b2Shape
 Inherited
GetUserData():*
Get the user data that was assigned in the shape definition.
b2Shape
 Inherited
IsSensor():Boolean
Is this shape a sensor (non-solid)?
b2Shape
 Inherited
SetFilterData(filter:b2FilterData):void
Set the contact filtering data.
b2Shape
 Inherited
SetFriction(friction:Number):void
Set the coefficient of friction.
b2Shape
 Inherited
SetRestitution(restitution:Number):void
Set the coefficient of restitution.
b2Shape
 Inherited
SetUserData(data:*):void
Set the user data.
b2Shape
  
TestPoint(transform:b2XForm, p:b2Vec2):Boolean
Test a point for containment in this shape.
b2CircleShape
  
TestSegment(transform:b2XForm, lambda:Array, normal:b2Vec2, segment:b2Segment, maxLambda:Number):int
Perform a ray cast against this shape.
b2CircleShape
Public Constants
 ConstantDefined by
 Inheritede_hitCollide : int = 1
[static] Return value for TestSegment indicating a hit.
b2Shape
 Inheritede_missCollide : int = 0
[static] Return value for TestSegment indicating a miss.
b2Shape
 Inheritede_startsInsideCollide : int = -1
[static] Return value for TestSegment indicating that the segment starting point, p1, is already inside the shape.
b2Shape
Method detail
ComputeAABB()method
public override function ComputeAABB(aabb:b2AABB, transform:b2XForm):void

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

Parameters
aabb:b2AABB — returns the axis aligned box.
 
transform:b2XForm — the world transform of the shape.
ComputeMass()method 
public override function ComputeMass(massData:b2MassData):void

Compute the mass properties of this shape using its dimensions and density. The inertia tensor is computed about the local origin, not the centroid.

Parameters
massData:b2MassData — returns the mass data for this shape.
ComputeSweptAABB()method 
public override function ComputeSweptAABB(aabb:b2AABB, transform1:b2XForm, transform2:b2XForm):void

Given two transforms, compute the associated swept axis aligned bounding box for this shape.

Parameters
aabb:b2AABB — returns the axis aligned box.
 
transform1:b2XForm — the starting shape world transform.
 
transform2:b2XForm — the ending shape world transform.
GetLocalPosition()method 
public function GetLocalPosition():b2Vec2

Get the local position of this circle in its parent body.

Returns
b2Vec2
GetRadius()method 
public function GetRadius():Number

Get the radius of this circle.

Returns
Number
TestPoint()method 
public override function TestPoint(transform:b2XForm, p:b2Vec2):Boolean

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

Parameters
transform:b2XForm — the shape world transform.
 
p:b2Vec2 — a point in world coordinates.

Returns
Boolean
TestSegment()method 
public override function TestSegment(transform:b2XForm, lambda:Array, normal:b2Vec2, segment:b2Segment, maxLambda:Number):int

Perform a ray cast against this shape.

Parameters
transform:b2XForm — the shape world transform.
 
lambda:Array — returns the hit fraction. You can use this to compute the contact point: p = (1 - lambda) segment.p1 + lambda segment.p2. lambda should be an array with one member. After calling TestSegment, you can retrieve the output value with lambda[0].
 
normal:b2Vec2 — returns the normal at the contact point. If there is no intersection, the normal is not set.
 
segment:b2Segment — defines the begin and end point of the ray cast.
 
maxLambda:Number — a number typically in the range [0,1].

Returns
int — b2Shape.e_hitCollide if there was an intersection, b2Shape.e_startsInsideCollide if the point is inside and b2Shape.e_missCollide otherwise.



Box2DFlashAS3 r42.