File indexing completed on 2024-12-29 03:29:27

 /*
 * Copyright (c) 2006-2007 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.
 */
 
 #include <Box2D/Dynamics/Joints/b2Joint.h>
 #include <Box2D/Dynamics/Joints/b2DistanceJoint.h>
 #include <Box2D/Dynamics/Joints/b2WheelJoint.h>
 #include <Box2D/Dynamics/Joints/b2MouseJoint.h>
 #include <Box2D/Dynamics/Joints/b2RevoluteJoint.h>
 #include <Box2D/Dynamics/Joints/b2PrismaticJoint.h>
 #include <Box2D/Dynamics/Joints/b2PulleyJoint.h>
 #include <Box2D/Dynamics/Joints/b2GearJoint.h>
 #include <Box2D/Dynamics/Joints/b2WeldJoint.h>
 #include <Box2D/Dynamics/Joints/b2FrictionJoint.h>
 #include <Box2D/Dynamics/Joints/b2RopeJoint.h>
 #include <Box2D/Dynamics/Joints/b2MotorJoint.h>
 #include <Box2D/Dynamics/b2Body.h>
 #include <Box2D/Dynamics/b2World.h>
 #include <Box2D/Common/b2BlockAllocator.h>
 
 #include <new>
 
 b2Joint* b2Joint::Create(const b2JointDef* def, b2BlockAllocator* allocator)
 {
     b2Joint* joint = NULL;
 
     switch (def->type)
     {
     case e_distanceJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2DistanceJoint));
             joint = new (mem) b2DistanceJoint(static_cast<const b2DistanceJointDef*>(def));
         }
         break;
 
     case e_mouseJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2MouseJoint));
             joint = new (mem) b2MouseJoint(static_cast<const b2MouseJointDef*>(def));
         }
         break;
 
     case e_prismaticJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2PrismaticJoint));
             joint = new (mem) b2PrismaticJoint(static_cast<const b2PrismaticJointDef*>(def));
         }
         break;
 
     case e_revoluteJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2RevoluteJoint));
             joint = new (mem) b2RevoluteJoint(static_cast<const b2RevoluteJointDef*>(def));
         }
         break;
 
     case e_pulleyJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2PulleyJoint));
             joint = new (mem) b2PulleyJoint(static_cast<const b2PulleyJointDef*>(def));
         }
         break;
 
     case e_gearJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2GearJoint));
             joint = new (mem) b2GearJoint(static_cast<const b2GearJointDef*>(def));
         }
         break;
 
     case e_wheelJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2WheelJoint));
             joint = new (mem) b2WheelJoint(static_cast<const b2WheelJointDef*>(def));
         }
         break;
 
     case e_weldJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2WeldJoint));
             joint = new (mem) b2WeldJoint(static_cast<const b2WeldJointDef*>(def));
         }
         break;
         
     case e_frictionJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2FrictionJoint));
             joint = new (mem) b2FrictionJoint(static_cast<const b2FrictionJointDef*>(def));
         }
         break;
 
     case e_ropeJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2RopeJoint));
             joint = new (mem) b2RopeJoint(static_cast<const b2RopeJointDef*>(def));
         }
         break;
 
     case e_motorJoint:
         {
             void* mem = allocator->Allocate(sizeof(b2MotorJoint));
             joint = new (mem) b2MotorJoint(static_cast<const b2MotorJointDef*>(def));
         }
         break;
 
     default:
         b2Assert(false);
         break;
     }
 
     return joint;
 }
 
 void b2Joint::Destroy(b2Joint* joint, b2BlockAllocator* allocator)
 {
     joint->~b2Joint();
     switch (joint->m_type)
     {
     case e_distanceJoint:
         allocator->Free(joint, sizeof(b2DistanceJoint));
         break;
 
     case e_mouseJoint:
         allocator->Free(joint, sizeof(b2MouseJoint));
         break;
 
     case e_prismaticJoint:
         allocator->Free(joint, sizeof(b2PrismaticJoint));
         break;
 
     case e_revoluteJoint:
         allocator->Free(joint, sizeof(b2RevoluteJoint));
         break;
 
     case e_pulleyJoint:
         allocator->Free(joint, sizeof(b2PulleyJoint));
         break;
 
     case e_gearJoint:
         allocator->Free(joint, sizeof(b2GearJoint));
         break;
 
     case e_wheelJoint:
         allocator->Free(joint, sizeof(b2WheelJoint));
         break;
     
     case e_weldJoint:
         allocator->Free(joint, sizeof(b2WeldJoint));
         break;
 
     case e_frictionJoint:
         allocator->Free(joint, sizeof(b2FrictionJoint));
         break;
 
     case e_ropeJoint:
         allocator->Free(joint, sizeof(b2RopeJoint));
         break;
 
     case e_motorJoint:
         allocator->Free(joint, sizeof(b2MotorJoint));
         break;
 
     default:
         b2Assert(false);
         break;
     }
 }
 
 b2Joint::b2Joint(const b2JointDef* def)
 {
     b2Assert(def->bodyA != def->bodyB);
 
     m_type = def->type;
     m_prev = NULL;
     m_next = NULL;
     m_bodyA = def->bodyA;
     m_bodyB = def->bodyB;
     m_index = 0;
     m_collideConnected = def->collideConnected;
     m_islandFlag = false;
     m_userData = def->userData;
 
     m_edgeA.joint = NULL;
     m_edgeA.other = NULL;
     m_edgeA.prev = NULL;
     m_edgeA.next = NULL;
 
     m_edgeB.joint = NULL;
     m_edgeB.other = NULL;
     m_edgeB.prev = NULL;
     m_edgeB.next = NULL;
 }
 
 bool b2Joint::IsActive() const
 {
     return m_bodyA->IsActive() && m_bodyB->IsActive();
 }