b2ContactSolver.h
上传用户:gb3593
上传日期:2022-01-07
资源大小:3028k
文件大小:2k
- /*
- * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
- *
- * 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/b2Island.h>
- class b2Contact;
- class b2Body;
- class b2StackAllocator;
- struct b2ContactConstraintPoint
- {
- b2Vec2 localPoint;
- b2Vec2 rA;
- b2Vec2 rB;
- float32 normalImpulse;
- float32 tangentImpulse;
- float32 normalMass;
- float32 tangentMass;
- float32 velocityBias;
- };
- struct b2ContactConstraint
- {
- b2ContactConstraintPoint points[b2_maxManifoldPoints];
- b2Vec2 localNormal;
- b2Vec2 localPoint;
- b2Vec2 normal;
- b2Mat22 normalMass;
- b2Mat22 K;
- b2Body* bodyA;
- b2Body* bodyB;
- b2Manifold::Type type;
- float32 radius;
- float32 friction;
- int32 pointCount;
- b2Manifold* manifold;
- };
- class b2ContactSolver
- {
- public:
- b2ContactSolver(b2Contact** contacts, int32 contactCount,
- b2StackAllocator* allocator, float32 impulseRatio);
- ~b2ContactSolver();
- void WarmStart();
- void SolveVelocityConstraints();
- void StoreImpulses();
- bool SolvePositionConstraints(float32 baumgarte);
- b2StackAllocator* m_allocator;
- b2ContactConstraint* m_constraints;
- int m_constraintCount;
- };
- #endif