Box2D  2.4.1
A 2D physics engine for games
b2_circle_shape.h
1 // MIT License
2 
3 // Copyright (c) 2019 Erin Catto
4 
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22 
23 #ifndef B2_CIRCLE_SHAPE_H
24 #define B2_CIRCLE_SHAPE_H
25 
26 #include "b2_api.h"
27 #include "b2_shape.h"
28 
30 class B2_API b2CircleShape : public b2Shape
31 {
32 public:
33  b2CircleShape();
34 
36  b2Shape* Clone(b2BlockAllocator* allocator) const override;
37 
39  int32 GetChildCount() const override;
40 
42  bool TestPoint(const b2Transform& transform, const b2Vec2& p) const override;
43 
47  bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input,
48  const b2Transform& transform, int32 childIndex) const override;
49 
51  void ComputeAABB(b2AABB* aabb, const b2Transform& transform, int32 childIndex) const override;
52 
54  void ComputeMass(b2MassData* massData, float density) const override;
55 
58 };
59 
60 inline b2CircleShape::b2CircleShape()
61 {
62  m_type = e_circle;
63  m_radius = 0.0f;
64  m_p.SetZero();
65 }
66 
67 #endif
b2Vec2
A 2D column vector.
Definition: b2_math.h:41
b2Shape::RayCast
virtual bool RayCast(b2RayCastOutput *output, const b2RayCastInput &input, const b2Transform &transform, int32 childIndex) const =0
b2Shape::GetChildCount
virtual int32 GetChildCount() const =0
Get the number of child primitives.
b2RayCastInput
Ray-cast input data. The ray extends from p1 to p1 + maxFraction * (p2 - p1).
Definition: b2_collision.h:153
b2Transform
Definition: b2_math.h:338
b2Shape::ComputeAABB
virtual void ComputeAABB(b2AABB *aabb, const b2Transform &xf, int32 childIndex) const =0
b2Shape::m_radius
float m_radius
Definition: b2_shape.h:102
b2Shape::ComputeMass
virtual void ComputeMass(b2MassData *massData, float density) const =0
b2AABB
An axis aligned bounding box.
Definition: b2_collision.h:168
b2CircleShape::m_p
b2Vec2 m_p
Position.
Definition: b2_circle_shape.h:57
b2BlockAllocator
Definition: b2_block_allocator.h:37
b2Shape
Definition: b2_shape.h:48
b2MassData
This holds the mass data computed for a shape.
Definition: b2_shape.h:33
b2Vec2::SetZero
void SetZero()
Set this vector to all zeros.
Definition: b2_math.h:50
b2Shape::Clone
virtual b2Shape * Clone(b2BlockAllocator *allocator) const =0
Clone the concrete shape using the provided allocator.
b2RayCastOutput
Definition: b2_collision.h:161
b2Shape::TestPoint
virtual bool TestPoint(const b2Transform &xf, const b2Vec2 &p) const =0
b2CircleShape
A solid circle shape.
Definition: b2_circle_shape.h:30