#include <b2Shape.h>

Inheritance diagram for b2Shape:

Public Types
enum	Type { e_circle = 0, e_edge = 1, e_polygon = 2, e_chain = 3, e_typeCount = 4 }
Public Member Functions
virtual b2Shape *	Clone (b2BlockAllocator *allocator) const =0
	Clone the concrete shape using the provided allocator.
virtual void	ComputeAABB (b2AABB *aabb, const b2Transform &xf, int32 childIndex) const =0
virtual void	ComputeMass (b2MassData *massData, float32 density) const =0
virtual int32	GetChildCount () const =0
	Get the number of child primitives.
Type	GetType () const
virtual bool	RayCast (b2RayCastOutput *output, const b2RayCastInput &input, const b2Transform &transform, int32 childIndex) const =0
virtual bool	TestPoint (const b2Transform &xf, const b2Vec2 &p) const =0
virtual	~b2Shape ()
Public Attributes
float32	m_radius
Type	m_type

Detailed Description

A shape is used for collision detection. You can create a shape however you like. Shapes used for simulation in b2World are created automatically when a b2Fixture is created. Shapes may encapsulate a one or more child shapes.

Definition at line 42 of file b2Shape.h.

Member Enumeration Documentation

enum b2Shape::Type

Enumerator:

e_circle
e_edge
e_polygon
e_chain
e_typeCount

Definition at line 46 of file b2Shape.h.

Constructor & Destructor Documentation

virtual b2Shape::~b2Shape ( ) [inline, virtual]

Definition at line 55 of file b2Shape.h.

Member Function Documentation

virtual b2Shape* b2Shape::Clone ( b2BlockAllocator * allocator ) const [pure virtual]

Clone the concrete shape using the provided allocator.

Implemented in b2ChainShape, b2EdgeShape, b2PolygonShape, and b2CircleShape.

virtual void b2Shape::ComputeAABB	(	b2AABB *	aabb,
		const b2Transform &	xf,
		int32	childIndex
	)		const `[pure virtual]`

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

Parameters:

aabb	returns the axis aligned box.
xf	the world transform of the shape.
childIndex	the child shape

Implemented in b2ChainShape, b2PolygonShape, b2EdgeShape, and b2CircleShape.

virtual void b2Shape::ComputeMass	(	b2MassData *	massData,
		float32	density
	)		const `[pure virtual]`

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

Parameters:

massData	returns the mass data for this shape.
density	the density in kilograms per meter squared.

Implemented in b2ChainShape, b2PolygonShape, b2EdgeShape, and b2CircleShape.

virtual int32 b2Shape::GetChildCount ( ) const [pure virtual]

Get the number of child primitives.

Implemented in b2ChainShape, b2EdgeShape, b2PolygonShape, and b2CircleShape.

b2Shape::Type b2Shape::GetType ( ) const [inline]

Get the type of this shape. You can use this to down cast to the concrete shape.

Returns:: the shape type.

Definition at line 96 of file b2Shape.h.

virtual bool b2Shape::RayCast	(	b2RayCastOutput *	output,
		const b2RayCastInput &	input,
		const b2Transform &	transform,
		int32	childIndex
	)		const `[pure virtual]`