/* * 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_ISLAND_H #define B2_ISLAND_H #include <Box2D/Common/b2Math.h> #include <Box2D/Dynamics/b2Body.h> #include <Box2D/Dynamics/b2TimeStep.h> class b2Contact; class b2Joint; class b2StackAllocator; class b2ContactListener; struct b2ContactConstraint; /// This is an internal structure. struct b2Position { b2Vec2 x; float32 a; }; /// This is an internal structure. struct b2Velocity { b2Vec2 v; float32 w; }; /// This is an internal class. class b2Island { public: b2Island(int32 bodyCapacity, int32 contactCapacity, int32 jointCapacity, b2StackAllocator* allocator, b2ContactListener* listener); ~b2Island(); void Clear() { m_bodyCount = 0; m_contactCount = 0; m_jointCount = 0; } void Solve(const b2TimeStep& step, const b2Vec2& gravity, bool allowSleep); void Add(b2Body* body) { b2Assert(m_bodyCount < m_bodyCapacity); body->m_islandIndex = m_bodyCount; m_bodies[m_bodyCount++] = body; } void Add(b2Contact* contact) { b2Assert(m_contactCount < m_contactCapacity); m_contacts[m_contactCount++] = contact; } void Add(b2Joint* joint) { b2Assert(m_jointCount < m_jointCapacity); m_joints[m_jointCount++] = joint; } void Report(const b2ContactConstraint* constraints); b2StackAllocator* m_allocator; b2ContactListener* m_listener; b2Body** m_bodies; b2Contact** m_contacts; b2Joint** m_joints; b2Position* m_positions; b2Velocity* m_velocities; int32 m_bodyCount; int32 m_jointCount; int32 m_contactCount; int32 m_bodyCapacity; int32 m_contactCapacity; int32 m_jointCapacity; int32 m_positionIterationCount; }; #endif