#include <b2_polygon_shape.h>

Inheritance diagram for b2PolygonShape:

Public Member Functions
	b2PolygonShape ()

b2Shape *	Clone (b2BlockAllocator *allocator) const override
	Implement b2Shape. More...

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

void	ComputeMass (b2MassData *massData, float density) const override

int32	GetChildCount () const override

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

void	Set (const b2Vec2 *points, int32 count)

void	SetAsBox (float hx, float hy)

void	SetAsBox (float hx, float hy, const b2Vec2 &center, float angle)

bool	TestPoint (const b2Transform &transform, const b2Vec2 &p) const override

bool	Validate () const

Public Member Functions inherited from b2Shape
Type	GetType () const

virtual	~b2Shape ()

Public Attributes
b2Vec2	m_centroid

int32	m_count

b2Vec2	m_normals [b2_maxPolygonVertices]

b2Vec2	m_vertices [b2_maxPolygonVertices]

Public Attributes inherited from b2Shape
float	m_radius

Type	m_type

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 solid 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.

Definition at line 32 of file b2_polygon_shape.h.

Constructor & Destructor Documentation

◆ b2PolygonShape()

b2PolygonShape::b2PolygonShape ( )

inline

Definition at line 87 of file b2_polygon_shape.h.

Member Function Documentation

◆ Clone()

b2Shape * b2PolygonShape::Clone ( b2BlockAllocator * allocator ) const

overridevirtual

Implement b2Shape.

Implements b2Shape.

Definition at line 28 of file b2_polygon_shape.cpp.

◆ ComputeAABB()

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

overridevirtual

See also: b2Shape::ComputeAABB

Implements b2Shape.

Definition at line 338 of file b2_polygon_shape.cpp.

◆ ComputeMass()

void b2PolygonShape::ComputeMass	(	b2MassData *	massData,
		float	density
	)		const

overridevirtual

See also: b2Shape::ComputeMass

Implements b2Shape.

Definition at line 357 of file b2_polygon_shape.cpp.

◆ GetChildCount()

int32 b2PolygonShape::GetChildCount ( ) const

overridevirtual

See also: b2Shape::GetChildCount

Implements b2Shape.

Definition at line 75 of file b2_polygon_shape.cpp.

◆ RayCast()

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

overridevirtual

Implement b2Shape.

Note: because the polygon is solid, rays that start inside do not hit because the normal is not defined.

Implements b2Shape.

Definition at line 266 of file b2_polygon_shape.cpp.

◆ Set()

void b2PolygonShape::Set	(	const b2Vec2 *	points,
		int32	count
	)

Create a convex hull from the given array of local points. The count must be in the range [3, b2_maxPolygonVertices].

Warning: the points may be re-ordered, even if they form a convex polygon; collinear points are handled but not removed. Collinear points may lead to poor stacking behavior.

Definition at line 118 of file b2_polygon_shape.cpp.

◆ SetAsBox() [1/2]

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

Build vertices to represent an axis-aligned box centered on the local origin.

Parameters

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

Definition at line 36 of file b2_polygon_shape.cpp.

◆ SetAsBox() [2/2]

void b2PolygonShape::SetAsBox	(	float	hx,
		float	hy,
		const b2Vec2 &	center,
		float	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.

Definition at line 50 of file b2_polygon_shape.cpp.

◆ TestPoint()

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

overridevirtual

See also: b2Shape::TestPoint

Implements b2Shape.

Definition at line 250 of file b2_polygon_shape.cpp.

◆ Validate()

bool b2PolygonShape::Validate ( ) const

Validate convexity. This is a very time consuming operation.

Returns: true if valid

Definition at line 433 of file b2_polygon_shape.cpp.

Member Data Documentation

◆ m_centroid

b2Vec2 b2PolygonShape::m_centroid

Definition at line 81 of file b2_polygon_shape.h.

◆ m_count

int32 b2PolygonShape::m_count

Definition at line 84 of file b2_polygon_shape.h.

◆ m_normals

b2Vec2 b2PolygonShape::m_normals[b2_maxPolygonVertices]

Definition at line 83 of file b2_polygon_shape.h.

◆ m_vertices

b2Vec2 b2PolygonShape::m_vertices[b2_maxPolygonVertices]

Definition at line 82 of file b2_polygon_shape.h.

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

Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ b2PolygonShape()

Member Function Documentation

◆ Clone()

◆ ComputeAABB()

◆ ComputeMass()

◆ GetChildCount()

◆ RayCast()

◆ Set()

◆ SetAsBox() [1/2]

◆ SetAsBox() [2/2]

◆ TestPoint()

◆ Validate()

Member Data Documentation

◆ m_centroid

◆ m_count

◆ m_normals

◆ m_vertices