b2_shape.h

// MIT License
 
// Copyright (c) 2019 Erin Catto
 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#ifndef B2_SHAPE_H
#define B2_SHAPE_H
 
#include "b2_api.h"
#include "b2_math.h"
#include "b2_collision.h"
 
class b2BlockAllocator;
 
struct B2_API b2MassData
{
    float mass;
 
    b2Vec2 center;
 
    float I;
};
 
class B2_API b2Shape
{
public:
 
    enum Type
    {
        e_circle = 0,
        e_edge = 1,
        e_polygon = 2,
        e_chain = 3,
        e_typeCount = 4
    };
 
    virtual ~b2Shape() {}
 
    virtual b2Shape* Clone(b2BlockAllocator* allocator) const = 0;
 
    Type GetType() const;
 
    virtual int32 GetChildCount() const = 0;
 
    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;
 
    Type m_type;
 
    float m_radius;
};
 
inline b2Shape::Type b2Shape::GetType() const
{
    return m_type;
}
 
#endif