b2EdgeShape.h

/*
* Copyright (c) 2006-2010 Erin Catto http://www.box2d.org
* Copyright (c) 2013 Google, Inc.
*
* This software is provided 'as-is', without any express or implied
* warranty.  In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/

#ifndef B2_EDGE_SHAPE_H
#define B2_EDGE_SHAPE_H

#include <Box2D/Collision/Shapes/b2Shape.h>

class b2EdgeShape : public b2Shape
{
public:
    b2EdgeShape();

    void Set(const b2Vec2& v1, const b2Vec2& v2);

    b2Shape* Clone(b2BlockAllocator* allocator) const;

    int32 GetChildCount() const;

    bool TestPoint(const b2Transform& transform, const b2Vec2& p) const;

    // @see b2Shape::ComputeDistance
    void ComputeDistance(const b2Transform& xf, const b2Vec2& p, float32* distance, b2Vec2* normal, int32 childIndex) const;

    bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input,
                const b2Transform& transform, int32 childIndex) const;

    void ComputeAABB(b2AABB* aabb, const b2Transform& transform, int32 childIndex) const;

    void ComputeMass(b2MassData* massData, float32 density) const;

#if LIQUIDFUN_EXTERNAL_LANGUAGE_API
public:
    void Set(float32 vx1, float32 vy1, float32 vx2, float32 vy2);
#endif // LIQUIDFUN_EXTERNAL_LANGUAGE_API

    b2Vec2 m_vertex1, m_vertex2;

    b2Vec2 m_vertex0, m_vertex3;
    bool m_hasVertex0, m_hasVertex3;
};

inline b2EdgeShape::b2EdgeShape()
{
    m_type = e_edge;
    m_radius = b2_polygonRadius;
    m_vertex0.x = 0.0f;
    m_vertex0.y = 0.0f;
    m_vertex3.x = 0.0f;
    m_vertex3.y = 0.0f;
    m_hasVertex0 = false;
    m_hasVertex3 = false;
}

#if LIQUIDFUN_EXTERNAL_LANGUAGE_API
inline void b2EdgeShape::Set(float32 vx1,
                                                         float32 vy1,
                                                         float32 vx2,
                                                         float32 vy2) {
    Set(b2Vec2(vx1, vy1), b2Vec2(vx2, vy2));
}
#endif // LIQUIDFUN_EXTERNAL_LANGUAGE_API


#endif