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Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/

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.


#include "SimdVector3.h"

#include "ConstraintSolver/JacobianEntry.h"
#include "TypedConstraint.h"

class RigidBody;

struct      ConstraintSetting
      ConstraintSetting()     :
      float       m_tau;
      float       m_damping;

/// point to point constraint between two rigidbodies each with a pivotpoint that descibes the 'ballsocket' location in local space
00038 class Point2PointConstraint : public TypedConstraint
      JacobianEntry     m_jac[3]; //3 orthogonal linear constraints
      SimdVector3 m_pivotInA;
      SimdVector3 m_pivotInB;

      ConstraintSetting m_setting;

      Point2PointConstraint(RigidBody& rbA,RigidBody& rbB, const SimdVector3& pivotInA,const SimdVector3& pivotInB);

      Point2PointConstraint(RigidBody& rbA,const SimdVector3& pivotInA);


      virtual void      BuildJacobian();

      virtual     void  SolveConstraint(SimdScalar    timeStep);

      void  UpdateRHS(SimdScalar    timeStep);

      void  SetPivotA(const SimdVector3& pivotA)
            m_pivotInA = pivotA;

      void  SetPivotB(const SimdVector3& pivotB)
            m_pivotInB = pivotB;



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