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-/*
-* 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_CONTACT_SOLVER_H
-#define B2_CONTACT_SOLVER_H
-
-#include "Box2D/Common/b2Math.h"
-#include "Box2D/Collision/b2Collision.h"
-#include "Box2D/Dynamics/b2TimeStep.h"
-
-class b2Contact;
-class b2Body;
-class b2StackAllocator;
-struct b2ContactPositionConstraint;
-
-struct b2VelocityConstraintPoint
-{
- b2Vec2 rA;
- b2Vec2 rB;
- float32 normalImpulse;
- float32 tangentImpulse;
- float32 normalMass;
- float32 tangentMass;
- float32 velocityBias;
-};
-
-struct b2ContactVelocityConstraint
-{
- b2VelocityConstraintPoint points[b2_maxManifoldPoints];
- b2Vec2 normal;
- b2Mat22 normalMass;
- b2Mat22 K;
- int32 indexA;
- int32 indexB;
- float32 invMassA, invMassB;
- float32 invIA, invIB;
- float32 friction;
- float32 restitution;
- float32 tangentSpeed;
- int32 pointCount;
- int32 contactIndex;
-};
-
-struct b2ContactSolverDef
-{
- b2TimeStep step;
- b2Contact** contacts;
- int32 count;
- b2Position* positions;
- b2Velocity* velocities;
- b2StackAllocator* allocator;
-};
-
-class b2ContactSolver
-{
-public:
- b2ContactSolver(b2ContactSolverDef* def);
- ~b2ContactSolver();
-
- void InitializeVelocityConstraints();
-
- void WarmStart();
- void SolveVelocityConstraints();
- void StoreImpulses();
-
- bool SolvePositionConstraints();
- bool SolveTOIPositionConstraints(int32 toiIndexA, int32 toiIndexB);
-
- b2TimeStep m_step;
- b2Position* m_positions;
- b2Velocity* m_velocities;
- b2StackAllocator* m_allocator;
- b2ContactPositionConstraint* m_positionConstraints;
- b2ContactVelocityConstraint* m_velocityConstraints;
- b2Contact** m_contacts;
- int m_count;
-};
-
-#endif
-