Box2D: /build/box2d/src/box2d-2.4.1/include/box2d/b2_shape.h Source File

| Box2D 2.4.1 A 2D physics engine for games

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b2_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
23#ifndef B2_SHAPE_H
24#define B2_SHAPE_H
25
26#include "b2_api.h"
27#include "b2_math.h"
28#include "b2_collision.h"
29
30class b2BlockAllocator;
31
33 struct B2_API b2MassData
34{
36 float mass;
37
39 b2Vec2 center;
40
42 float I;
43};
44
48 class B2_API b2Shape
49{
50public:
51
52 enum Type
53 {
54 e_circle = 0,
55 e_edge = 1,
56 e_polygon = 2,
57 e_chain = 3,
58 e_typeCount = 4
59 };
60
61 virtual ~b2Shape() {}
62
64 virtual b2Shape* Clone(b2BlockAllocator* allocator) const = 0;
65
68 Type GetType() const;
69
71 virtual int32 GetChildCount() const = 0;
72
76 virtual bool TestPoint(const b2Transform& xf, const b2Vec2& p) const = 0;
77
83 virtual bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input,
84 const b2Transform& transform, int32 childIndex) const = 0;
85
90 virtual void ComputeAABB(b2AABB* aabb, const b2Transform& xf, int32 childIndex) const = 0;
91
96 virtual void ComputeMass(b2MassData* massData, float density) const = 0;
97
98 Type m_type;
99
102 float m_radius;
103};
104
105 inline b2Shape::Type b2Shape::GetType() const
106{
107 return m_type;
108}
109
110#endif
b2_collision.h
b2BlockAllocator
Definition b2_block_allocator.h:38
b2Shape
Definition b2_shape.h:49
b2Shape::GetChildCount
virtual int32 GetChildCount() const =0
Get the number of child primitives.
b2Shape::ComputeMass
virtual void ComputeMass(b2MassData *massData, float density) const =0
b2Shape::GetType
Type GetType() const
Definition b2_shape.h:105
b2Shape::TestPoint
virtual bool TestPoint(const b2Transform &xf, const b2Vec2 &p) const =0
b2Shape::ComputeAABB
virtual void ComputeAABB(b2AABB *aabb, const b2Transform &xf, int32 childIndex) const =0
b2Shape::Clone
virtual b2Shape * Clone(b2BlockAllocator *allocator) const =0
Clone the concrete shape using the provided allocator.
b2Shape::RayCast
virtual bool RayCast(b2RayCastOutput *output, const b2RayCastInput &input, const b2Transform &transform, int32 childIndex) const =0
b2Shape::m_radius
float m_radius
Definition b2_shape.h:102
b2AABB
An axis aligned bounding box.
Definition b2_collision.h:169
b2MassData
This holds the mass data computed for a shape.
Definition b2_shape.h:34
b2MassData::center
b2Vec2 center
The position of the shape's centroid relative to the shape's origin.
Definition b2_shape.h:39
b2MassData::mass
float mass
The mass of the shape, usually in kilograms.
Definition b2_shape.h:36
b2MassData::I
float I
The rotational inertia of the shape about the local origin.
Definition b2_shape.h:42
b2RayCastInput
Ray-cast input data. The ray extends from p1 to p1 + maxFraction * (p2 - p1).
Definition b2_collision.h:154
b2RayCastOutput
Definition b2_collision.h:162
b2Transform
Definition b2_math.h:339
b2Vec2
A 2D column vector.
Definition b2_math.h:42