File indexing completed on 2024-06-02 03:42:36

 /*
 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
 *
 * 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_CIRCLE_SHAPE_H
 #define B2_CIRCLE_SHAPE_H
 
 #include <Box2D/Collision/Shapes/b2Shape.h>
 
 /// A circle shape.
 class b2CircleShape : public b2Shape
 {
 public:
     b2CircleShape();
 
     /// Implement b2Shape.
     b2Shape* Clone(b2BlockAllocator* allocator) const;
 
     /// @see b2Shape::GetChildCount
     int32 GetChildCount() const;
 
     /// Implement b2Shape.
     bool TestPoint(const b2Transform& transform, const b2Vec2& p) const;
 
     /// Implement b2Shape.
     bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input,
                 const b2Transform& transform, int32 childIndex) const;
 
     /// @see b2Shape::ComputeAABB
     void ComputeAABB(b2AABB* aabb, const b2Transform& transform, int32 childIndex) const;
 
     /// @see b2Shape::ComputeMass
     void ComputeMass(b2MassData* massData, float32 density) const;
 
     /// Get the supporting vertex index in the given direction.
     int32 GetSupport(const b2Vec2& d) const;
 
     /// Get the supporting vertex in the given direction.
     const b2Vec2& GetSupportVertex(const b2Vec2& d) const;
 
     /// Get the vertex count.
     int32 GetVertexCount() const { return 1; }
 
     /// Get a vertex by index. Used by b2Distance.
     const b2Vec2& GetVertex(int32 index) const;
 
     /// Position
     b2Vec2 m_p;
 };
 
 inline b2CircleShape::b2CircleShape()
 {
     m_type = e_circle;
     m_radius = 0.0f;
     m_p.SetZero();
 }
 
 inline int32 b2CircleShape::GetSupport(const b2Vec2 &d) const
 {
     B2_NOT_USED(d);
     return 0;
 }
 
 inline const b2Vec2& b2CircleShape::GetSupportVertex(const b2Vec2 &d) const
 {
     B2_NOT_USED(d);
     return m_p;
 }
 
 inline const b2Vec2& b2CircleShape::GetVertex(int32 index) const
 {
     B2_NOT_USED(index);
     b2Assert(index == 0);
     return m_p;
 }
 
 #endif