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b2ChainShape.h

    00001 /*
    00002 * Copyright (c) 2006-2010 Erin Catto http://www.box2d.org
    00003 *
    00004 * This software is provided 'as-is', without any express or implied
    00005 * warranty.  In no event will the authors be held liable for any damages
    00006 * arising from the use of this software.
    00007 * Permission is granted to anyone to use this software for any purpose,
    00008 * including commercial applications, and to alter it and redistribute it
    00009 * freely, subject to the following restrictions:
    00010 * 1. The origin of this software must not be misrepresented; you must not
    00011 * claim that you wrote the original software. If you use this software
    00012 * in a product, an acknowledgment in the product documentation would be
    00013 * appreciated but is not required.
    00014 * 2. Altered source versions must be plainly marked as such, and must not be
    00015 * misrepresented as being the original software.
    00016 * 3. This notice may not be removed or altered from any source distribution.
    00017 */
    00018
    00019 #ifndef B2_CHAIN_SHAPE_H
    00020 #define B2_CHAIN_SHAPE_H
    00021
    00022 #include <Box2D/Collision/Shapes/b2Shape.h>
    00023
    00024 class b2EdgeShape;
    00025
    00032 class b2ChainShape : public b2Shape
    00033 {
    00034 public:
    00035         b2ChainShape();
    00036
    00038         ~b2ChainShape();
    00039
    00043         void CreateLoop(const b2Vec2* vertices, int32 count);
    00044
    00048         void CreateChain(const b2Vec2* vertices, int32 count);
    00049
    00052         void SetPrevVertex(const b2Vec2& prevVertex);
    00053
    00056         void SetNextVertex(const b2Vec2& nextVertex);
    00057
    00059         b2Shape* Clone(b2BlockAllocator* allocator) const;
    00060
    00062         int32 GetChildCount() const;
    00063
    00065         void GetChildEdge(b2EdgeShape* edge, int32 index) const;
    00066
    00069         bool TestPoint(const b2Transform& transform, const b2Vec2& p) const;
    00070
    00072         bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input,
    00073                                         const b2Transform& transform, int32 childIndex) const;
    00074
    00076         void ComputeAABB(b2AABB* aabb, const b2Transform& transform, int32 childIndex) const;
    00077
    00080         void ComputeMass(b2MassData* massData, float32 density) const;
    00081
    00083         b2Vec2* m_vertices;
    00084
    00086         int32 m_count;
    00087
    00088         b2Vec2 m_prevVertex, m_nextVertex;
    00089         bool m_hasPrevVertex, m_hasNextVertex;
    00090 };
    00091
    00092 inline b2ChainShape::b2ChainShape()
    00093 {
    00094         m_type = e_chain;
    00095         m_radius = b2_polygonRadius;
    00096         m_vertices = NULL;
    00097         m_count = 0;
    00098         m_hasPrevVertex = NULL;
    00099         m_hasNextVertex = NULL;
    00100 }
    00101
    00102 #endif

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