Box2D: /build/box2d/src/box2d-2.4.1/include/box2d/b2_polygon_shape.h Source File

| Box2D 2.4.1 A 2D physics engine for games

b2_polygon_shape.h
1 // MIT License
2
3 // Copyright (c) 2019 Erin Catto
4
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
11
12 // The above copyright notice and this permission notice shall be included in all
13 // copies or substantial portions of the Software.
14
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 // SOFTWARE.
22 #ifndef B2_POLYGON_SHAPE_H
23 #define B2_POLYGON_SHAPE_H
24
25 #include "b2_api.h"
26 #include "b2_shape.h"
27
32 class B2_API b2PolygonShape : public b2Shape
33 {
34 public:
35 b2PolygonShape();
36
38 b2Shape* Clone(b2BlockAllocator* allocator) const override;
39
41 int32 GetChildCount() const override;
42
48 void Set(const b2Vec2* points, int32 count);
49
53 void SetAsBox(float hx, float hy);
54
60 void SetAsBox(float hx, float hy, const b2Vec2& center, float angle);
61
63 bool TestPoint(const b2Transform& transform, const b2Vec2& p) const override;
64
68 bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input,
69 const b2Transform& transform, int32 childIndex) const override;
70
72 void ComputeAABB(b2AABB* aabb, const b2Transform& transform, int32 childIndex) const override;
73
75 void ComputeMass(b2MassData* massData, float density) const override;
76
79 bool Validate() const;
80
81 b2Vec2 m_centroid;
82 b2Vec2 m_vertices[b2_maxPolygonVertices];
83 b2Vec2 m_normals[b2_maxPolygonVertices];
84 int32 m_count;
85 };
86
87 inline b2PolygonShape::b2PolygonShape()
88 {
89 m_type = e_polygon;
90 m_radius = b2_polygonRadius;
91 m_count = 0;
92 m_centroid.SetZero();
93 }
94
95 #endif
b2PolygonShape::Validate
bool Validate() const
b2Vec2
A 2D column vector.
Definition: b2_math.h:42
b2RayCastInput
Ray-cast input data. The ray extends from p1 to p1 + maxFraction * (p2 - p1).
Definition: b2_collision.h:154
b2Transform
Definition: b2_math.h:339
b2PolygonShape::SetAsBox
void SetAsBox(float hx, float hy)
b2PolygonShape::Set
void Set(const b2Vec2 *points, int32 count)
b2Shape::m_radius
float m_radius
Definition: b2_shape.h:102
b2PolygonShape::Clone
b2Shape * Clone(b2BlockAllocator *allocator) const override
Implement b2Shape.
b2PolygonShape::RayCast
bool RayCast(b2RayCastOutput *output, const b2RayCastInput &input, const b2Transform &transform, int32 childIndex) const override
b2PolygonShape::SetAsBox
void SetAsBox(float hx, float hy, const b2Vec2 &center, float angle)
b2AABB
An axis aligned bounding box.
Definition: b2_collision.h:169
b2BlockAllocator
Definition: b2_block_allocator.h:38
b2PolygonShape::TestPoint
bool TestPoint(const b2Transform &transform, const b2Vec2 &p) const override
b2PolygonShape
Definition: b2_polygon_shape.h:33
b2_polygonRadius
#define b2_polygonRadius
Definition: b2_common.h:74
b2Shape
Definition: b2_shape.h:49
b2MassData
This holds the mass data computed for a shape.
Definition: b2_shape.h:34
b2Vec2::SetZero
void SetZero()
Set this vector to all zeros.
Definition: b2_math.h:50
b2PolygonShape::ComputeMass
void ComputeMass(b2MassData *massData, float density) const override
b2PolygonShape::ComputeAABB
void ComputeAABB(b2AABB *aabb, const b2Transform &transform, int32 childIndex) const override
b2RayCastOutput
Definition: b2_collision.h:162
b2PolygonShape::GetChildCount
int32 GetChildCount() const override
b2_maxPolygonVertices
#define b2_maxPolygonVertices
Definition: b2_settings.h:53