b2EdgeShape Class Reference

#include <b2_edge_shape.h>

Inheritance diagram for b2EdgeShape:

Public Member Functions
void	SetOneSided (const b2Vec2 &v0, const b2Vec2 &v1, const b2Vec2 &v2, const b2Vec2 &v3)
void	SetTwoSided (const b2Vec2 &v1, const b2Vec2 &v2)
	Set this as an isolated edge. Collision is two-sided.
b2Shape *	Clone (b2BlockAllocator *allocator) const override
	Implement b2Shape. More...
int32	GetChildCount () const override
bool	TestPoint (const b2Transform &transform, const b2Vec2 &p) const override
bool	RayCast (b2RayCastOutput *output, const b2RayCastInput &input, const b2Transform &transform, int32 childIndex) const override
	Implement b2Shape. More...
void	ComputeAABB (b2AABB *aabb, const b2Transform &transform, int32 childIndex) const override
void	ComputeMass (b2MassData *massData, float density) const override
Public Member Functions inherited from b2Shape
virtual b2Shape *	Clone (b2BlockAllocator *allocator) const =0
	Clone the concrete shape using the provided allocator. More...
Type	GetType () const
virtual int32	GetChildCount () const =0
	Get the number of child primitives. More...
virtual bool	TestPoint (const b2Transform &xf, const b2Vec2 &p) const =0
virtual bool	RayCast (b2RayCastOutput *output, const b2RayCastInput &input, const b2Transform &transform, int32 childIndex) const =0
virtual void	ComputeAABB (b2AABB *aabb, const b2Transform &xf, int32 childIndex) const =0
virtual void	ComputeMass (b2MassData *massData, float density) const =0

Public Attributes
b2Vec2	m_vertex1
	These are the edge vertices.
b2Vec2	m_vertex2
b2Vec2	m_vertex0
	Optional adjacent vertices. These are used for smooth collision.
b2Vec2	m_vertex3
bool	m_oneSided
	Uses m_vertex0 and m_vertex3 to create smooth collision.
Public Attributes inherited from b2Shape
Type	m_type
float	m_radius

Additional Inherited Members
Public Types inherited from b2Shape
enum	Type {   e_circle = 0 , e_edge = 1 , e_polygon = 2 , e_chain = 3 ,   e_typeCount = 4 }

Detailed Description

A line segment (edge) shape. These can be connected in chains or loops to other edge shapes. Edges created independently are two-sided and do no provide smooth movement across junctions.

Member Function Documentation

Clone()

b2Shape * b2EdgeShape::Clone ( b2BlockAllocator *  allocator ) const

overridevirtual

Implement b2Shape.

Implements b2Shape.

ComputeAABB()

void b2EdgeShape::ComputeAABB ( b2AABB *  aabb, const b2Transform &  transform, int32  childIndex  ) const

overridevirtual

See also

b2Shape::ComputeAABB

Implements b2Shape.

ComputeMass()

void b2EdgeShape::ComputeMass ( b2MassData *  massData, float  density  ) const

overridevirtual

See also

b2Shape::ComputeMass

Implements b2Shape.

GetChildCount()

int32 b2EdgeShape::GetChildCount ( ) const

overridevirtual

See also

b2Shape::GetChildCount

Implements b2Shape.

RayCast()

bool b2EdgeShape::RayCast ( b2RayCastOutput *  output, const b2RayCastInput &  input, const b2Transform &  transform, int32  childIndex  ) const

overridevirtual

Implement b2Shape.

Implements b2Shape.

SetOneSided()

void b2EdgeShape::SetOneSided	(	const b2Vec2 &	v0,
		const b2Vec2 &	v1,
		const b2Vec2 &	v2,
		const b2Vec2 &	v3
	)

Set this as a part of a sequence. Vertex v0 precedes the edge and vertex v3 follows. These extra vertices are used to provide smooth movement across junctions. This also makes the collision one-sided. The edge normal points to the right looking from v1 to v2.

TestPoint()

bool b2EdgeShape::TestPoint ( const b2Transform &  transform, const b2Vec2 &  p  ) const

overridevirtual

See also

b2Shape::TestPoint

Implements b2Shape.

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

• include/box2d/b2_edge_shape.h