b2PolygonShape Class Reference

#include <b2PolygonShape.h>

Inheritance diagram for b2PolygonShape:

Collaboration diagram for b2PolygonShape:

List of all members.

Public Member Functions
b2Shape *	Clone (b2BlockAllocator *allocator) const
	Implement b2Shape.
int32	GetChildCount () const
void	Set (const b2Vec2 *vertices, int32 vertexCount)
void	SetAsBox (float32 hx, float32 hy)
void	SetAsBox (float32 hx, float32 hy, const b2Vec2 ¢er, float32 angle)
bool	TestPoint (const b2Transform &transform, const b2Vec2 &p) const
bool	RayCast (b2RayCastOutput *output, const b2RayCastInput &input, const b2Transform &transform, int32 childIndex) const
	Implement b2Shape.
void	ComputeAABB (b2AABB *aabb, const b2Transform &transform, int32 childIndex) const
void	ComputeMass (b2MassData *massData, float32 density) const
int32	GetVertexCount () const
	Get the vertex count.
const b2Vec2 &	GetVertex (int32 index) const
	Get a vertex by index.
Public Attributes
b2Vec2	m_centroid
b2Vec2	m_vertices [b2_maxPolygonVertices]
b2Vec2	m_normals [b2_maxPolygonVertices]
int32	m_vertexCount

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Detailed Description

A convex polygon. It is assumed that the interior of the polygon is to the left of each edge. Polygons have a maximum number of vertices equal to b2_maxPolygonVertices. In most cases you should not need many vertices for a convex polygon.

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Member Function Documentation

b2Shape* b2PolygonShape::Clone

(

b2BlockAllocator *

allocator

)

const [virtual]

Implement b2Shape.

Implements b2Shape.

void b2PolygonShape::ComputeAABB	(	b2AABB *	aabb,
		const b2Transform &	transform,
		int32	childIndex
	)		const [virtual]

See also:

b2Shape::ComputeAABB

Implements b2Shape.

void b2PolygonShape::ComputeMass	(	b2MassData *	massData,
		float32	density
	)		const [virtual]

See also:

b2Shape::ComputeMass

Implements b2Shape.

int32 b2PolygonShape::GetChildCount

(

)

const [virtual]

See also:

b2Shape::GetChildCount

Implements b2Shape.

const b2Vec2 & b2PolygonShape::GetVertex

(

int32

index

)

const [inline]

Get a vertex by index.

int32 b2PolygonShape::GetVertexCount

(

)

const [inline]

Get the vertex count.

bool b2PolygonShape::RayCast	(	b2RayCastOutput *	output,
		const b2RayCastInput &	input,
		const b2Transform &	transform,
		int32	childIndex
	)		const [virtual]

Implement b2Shape.

Implements b2Shape.

void b2PolygonShape::Set	(	const b2Vec2 *	vertices,
		int32	vertexCount
	)

Copy vertices. This assumes the vertices define a convex polygon. It is assumed that the exterior is the the right of each edge. The count must be in the range [3, b2_maxPolygonVertices].

void b2PolygonShape::SetAsBox	(	float32	hx,
		float32	hy
	)

Build vertices to represent an axis-aligned box.

Parameters:

hx	the half-width.
hy	the half-height.

void b2PolygonShape::SetAsBox	(	float32	hx,
		float32	hy,
		const b2Vec2 &	center,
		float32	angle
	)

Build vertices to represent an oriented box.

Parameters:

hx	the half-width.
hy	the half-height.
center	the center of the box in local coordinates.
angle	the rotation of the box in local coordinates.

bool b2PolygonShape::TestPoint	(	const b2Transform &	transform,
		const b2Vec2 &	p
	)		const [virtual]

See also:

b2Shape::TestPoint

Implements b2Shape.

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The documentation for this class was generated from the following file:

• b2PolygonShape.h