b2Island.h
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00001 /*
00002 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
00003 *
00004 * This software is provided 'as-is', without any express or implied
00005 * warranty.  In no event will the authors be held liable for any damages
00006 * arising from the use of this software.
00007 * Permission is granted to anyone to use this software for any purpose,
00008 * including commercial applications, and to alter it and redistribute it
00009 * freely, subject to the following restrictions:
00010 * 1. The origin of this software must not be misrepresented; you must not
00011 * claim that you wrote the original software. If you use this software
00012 * in a product, an acknowledgment in the product documentation would be
00013 * appreciated but is not required.
00014 * 2. Altered source versions must be plainly marked as such, and must not be
00015 * misrepresented as being the original software.
00016 * 3. This notice may not be removed or altered from any source distribution.
00017 */
00018 
00019 #ifndef B2_ISLAND_H
00020 #define B2_ISLAND_H
00021 
00022 #include <Box2D/Common/b2Math.h>
00023 #include <Box2D/Dynamics/b2Body.h>
00024 #include <Box2D/Dynamics/b2TimeStep.h>
00025 
00026 class b2Contact;
00027 class b2Joint;
00028 class b2StackAllocator;
00029 class b2ContactListener;
00030 struct b2ContactVelocityConstraint;
00031 struct b2Profile;
00032 
00034 class b2Island
00035 {
00036 public:
00037         b2Island(int32 bodyCapacity, int32 contactCapacity, int32 jointCapacity,
00038                         b2StackAllocator* allocator, b2ContactListener* listener);
00039         ~b2Island();
00040 
00041         void Clear()
00042         {
00043                 m_bodyCount = 0;
00044                 m_contactCount = 0;
00045                 m_jointCount = 0;
00046         }
00047 
00048         void Solve(b2Profile* profile, const b2TimeStep& step, const b2Vec2& gravity, bool allowSleep);
00049 
00050         void SolveTOI(const b2TimeStep& subStep, int32 toiIndexA, int32 toiIndexB);
00051 
00052         void Add(b2Body* body)
00053         {
00054                 b2Assert(m_bodyCount < m_bodyCapacity);
00055                 body->m_islandIndex = m_bodyCount;
00056                 m_bodies[m_bodyCount] = body;
00057                 ++m_bodyCount;
00058         }
00059 
00060         void Add(b2Contact* contact)
00061         {
00062                 b2Assert(m_contactCount < m_contactCapacity);
00063                 m_contacts[m_contactCount++] = contact;
00064         }
00065 
00066         void Add(b2Joint* joint)
00067         {
00068                 b2Assert(m_jointCount < m_jointCapacity);
00069                 m_joints[m_jointCount++] = joint;
00070         }
00071 
00072         void Report(const b2ContactVelocityConstraint* constraints);
00073 
00074         b2StackAllocator* m_allocator;
00075         b2ContactListener* m_listener;
00076 
00077         b2Body** m_bodies;
00078         b2Contact** m_contacts;
00079         b2Joint** m_joints;
00080 
00081         b2Position* m_positions;
00082         b2Velocity* m_velocities;
00083 
00084         int32 m_bodyCount;
00085         int32 m_jointCount;
00086         int32 m_contactCount;
00087 
00088         int32 m_bodyCapacity;
00089         int32 m_contactCapacity;
00090         int32 m_jointCapacity;
00091 };
00092 
00093 #endif


mvsim
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autogenerated on Thu Jun 6 2019 22:08:34