Warning, file /education/gcompris/external/qml-box2d/Box2D/Rope/b2Rope.h was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
 * Copyright (c) 2011 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_ROPE_H
 #define B2_ROPE_H
 
 #include <Box2D/Common/b2Math.h>
 
 class b2Draw;
 
 /// 
 struct b2RopeDef
 {
     b2RopeDef()
     {
         vertices = NULL;
         count = 0;
         masses = NULL;
         gravity.SetZero();
         damping = 0.1f;
         k2 = 0.9f;
         k3 = 0.1f;
     }
 
     ///
     b2Vec2* vertices;
 
     ///
     int32 count;
 
     ///
     float32* masses;
 
     ///
     b2Vec2 gravity;
 
     ///
     float32 damping;
 
     /// Stretching stiffness
     float32 k2;
 
     /// Bending stiffness. Values above 0.5 can make the simulation blow up.
     float32 k3;
 };
 
 /// 
 class b2Rope
 {
 public:
     b2Rope();
     ~b2Rope();
 
     ///
     void Initialize(const b2RopeDef* def);
 
     ///
     void Step(float32 timeStep, int32 iterations);
 
     ///
     int32 GetVertexCount() const
     {
         return m_count;
     }
 
     ///
     const b2Vec2* GetVertices() const
     {
         return m_ps;
     }
 
     ///
     void Draw(b2Draw* draw) const;
 
     ///
     void SetAngle(float32 angle);
 
 private:
 
     void SolveC2();
     void SolveC3();
 
     int32 m_count;
     b2Vec2* m_ps;
     b2Vec2* m_p0s;
     b2Vec2* m_vs;
 
     float32* m_ims;
 
     float32* m_Ls;
     float32* m_as;
 
     b2Vec2 m_gravity;
     float32 m_damping;
 
     float32 m_k2;
     float32 m_k3;
 };
 
 #endif