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[blok] / Box2D / Source / Dynamics / b2Island.h

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+/*
+* Copyright (c) 2006-2007 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 "../Common/b2Math.h"
+
+class b2Contact;
+class b2Body;
+class b2Joint;
+class b2StackAllocator;
+class b2ContactListener;
+struct b2ContactConstraint;
+struct b2TimeStep;
+
+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 correctPositions, bool allowSleep);
+
+       void SolveTOI(const b2TimeStep& subStep);
+
+       void Add(b2Body* body)
+       {
+               b2Assert(m_bodyCount < m_bodyCapacity);
+               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(b2ContactConstraint* constraints);
+
+       b2StackAllocator* m_allocator;
+       b2ContactListener* m_listener;
+
+       b2Body** m_bodies;
+       b2Contact** m_contacts;
+       b2Joint** m_joints;
+
+       int32 m_bodyCount;
+       int32 m_jointCount;
+       int32 m_contactCount;
+
+       int32 m_bodyCapacity;
+       int32 m_contactCapacity;
+       int32 m_jointCapacity;
+
+       int32 m_positionIterationCount;
+};
+
+#endif