b2_shape.h

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// 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