mirror of https://github.com/axmolengine/axmol.git
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/*
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* Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef B2_CIRCLE_SHAPE_H
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#define B2_CIRCLE_SHAPE_H
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#include <Box2D/Collision/Shapes/b2Shape.h>
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/// A circle shape.
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class b2CircleShape : public b2Shape
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{
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public:
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b2CircleShape();
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/// Implement b2Shape.
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b2Shape* Clone(b2BlockAllocator* allocator) const;
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/// Implement b2Shape.
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bool TestPoint(const b2Transform& transform, const b2Vec2& p) const;
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/// Implement b2Shape.
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bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input, const b2Transform& transform) const;
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/// @see b2Shape::ComputeAABB
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void ComputeAABB(b2AABB* aabb, const b2Transform& transform) const;
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/// @see b2Shape::ComputeMass
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void ComputeMass(b2MassData* massData, float32 density) const;
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/// Get the supporting vertex index in the given direction.
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int32 GetSupport(const b2Vec2& d) const;
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/// Get the supporting vertex in the given direction.
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const b2Vec2& GetSupportVertex(const b2Vec2& d) const;
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/// Get the vertex count.
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int32 GetVertexCount() const { return 1; }
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/// Get a vertex by index. Used by b2Distance.
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const b2Vec2& GetVertex(int32 index) const;
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/// Position
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b2Vec2 m_p;
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};
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inline b2CircleShape::b2CircleShape()
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{
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m_type = e_circle;
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m_radius = 0.0f;
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m_p.SetZero();
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}
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inline int32 b2CircleShape::GetSupport(const b2Vec2 &d) const
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{
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B2_NOT_USED(d);
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return 0;
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}
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inline const b2Vec2& b2CircleShape::GetSupportVertex(const b2Vec2 &d) const
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{
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B2_NOT_USED(d);
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return m_p;
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}
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inline const b2Vec2& b2CircleShape::GetVertex(int32 index) const
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{
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B2_NOT_USED(index);
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b2Assert(index == 0);
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return m_p;
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}
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#endif
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