1/*
2* Copyright (c) 2006-2007 Erin Catto http://www.box2d.org
3*
4* This software is provided 'as-is', without any express or implied
5* warranty. In no event will the authors be held liable for any damages
6* arising from the use of this software.
7* Permission is granted to anyone to use this software for any purpose,
8* including commercial applications, and to alter it and redistribute it
9* freely, subject to the following restrictions:
10* 1. The origin of this software must not be misrepresented; you must not
11* claim that you wrote the original software. If you use this software
12* in a product, an acknowledgment in the product documentation would be
13* appreciated but is not required.
14* 2. Altered source versions must be plainly marked as such, and must not be
15* misrepresented as being the original software.
16* 3. This notice may not be removed or altered from any source distribution.
17*/
18
19#include <Box2D/Dynamics/Joints/b2Joint.h>
20#include <Box2D/Dynamics/Joints/b2DistanceJoint.h>
21#include <Box2D/Dynamics/Joints/b2WheelJoint.h>
22#include <Box2D/Dynamics/Joints/b2MouseJoint.h>
23#include <Box2D/Dynamics/Joints/b2RevoluteJoint.h>
24#include <Box2D/Dynamics/Joints/b2PrismaticJoint.h>
25#include <Box2D/Dynamics/Joints/b2PulleyJoint.h>
26#include <Box2D/Dynamics/Joints/b2GearJoint.h>
27#include <Box2D/Dynamics/Joints/b2WeldJoint.h>
28#include <Box2D/Dynamics/Joints/b2FrictionJoint.h>
29#include <Box2D/Dynamics/Joints/b2RopeJoint.h>
30#include <Box2D/Dynamics/Joints/b2MotorJoint.h>
31#include <Box2D/Dynamics/b2Body.h>
32#include <Box2D/Dynamics/b2World.h>
33#include <Box2D/Common/b2BlockAllocator.h>
34
35#include <new>
36
37b2Joint* b2Joint::Create(const b2JointDef* def, b2BlockAllocator* allocator)
38{
39 b2Joint* joint = NULL;
40
41 switch (def->type)
42 {
43 case e_distanceJoint:
44 {
45 void* mem = allocator->Allocate(sizeof(b2DistanceJoint));
46 joint = new (mem) b2DistanceJoint(static_cast<const b2DistanceJointDef*>(def));
47 }
48 break;
49
50 case e_mouseJoint:
51 {
52 void* mem = allocator->Allocate(sizeof(b2MouseJoint));
53 joint = new (mem) b2MouseJoint(static_cast<const b2MouseJointDef*>(def));
54 }
55 break;
56
57 case e_prismaticJoint:
58 {
59 void* mem = allocator->Allocate(sizeof(b2PrismaticJoint));
60 joint = new (mem) b2PrismaticJoint(static_cast<const b2PrismaticJointDef*>(def));
61 }
62 break;
63
64 case e_revoluteJoint:
65 {
66 void* mem = allocator->Allocate(sizeof(b2RevoluteJoint));
67 joint = new (mem) b2RevoluteJoint(static_cast<const b2RevoluteJointDef*>(def));
68 }
69 break;
70
71 case e_pulleyJoint:
72 {
73 void* mem = allocator->Allocate(sizeof(b2PulleyJoint));
74 joint = new (mem) b2PulleyJoint(static_cast<const b2PulleyJointDef*>(def));
75 }
76 break;
77
78 case e_gearJoint:
79 {
80 void* mem = allocator->Allocate(sizeof(b2GearJoint));
81 joint = new (mem) b2GearJoint(static_cast<const b2GearJointDef*>(def));
82 }
83 break;
84
85 case e_wheelJoint:
86 {
87 void* mem = allocator->Allocate(sizeof(b2WheelJoint));
88 joint = new (mem) b2WheelJoint(static_cast<const b2WheelJointDef*>(def));
89 }
90 break;
91
92 case e_weldJoint:
93 {
94 void* mem = allocator->Allocate(sizeof(b2WeldJoint));
95 joint = new (mem) b2WeldJoint(static_cast<const b2WeldJointDef*>(def));
96 }
97 break;
98
99 case e_frictionJoint:
100 {
101 void* mem = allocator->Allocate(sizeof(b2FrictionJoint));
102 joint = new (mem) b2FrictionJoint(static_cast<const b2FrictionJointDef*>(def));
103 }
104 break;
105
106 case e_ropeJoint:
107 {
108 void* mem = allocator->Allocate(sizeof(b2RopeJoint));
109 joint = new (mem) b2RopeJoint(static_cast<const b2RopeJointDef*>(def));
110 }
111 break;
112
113 case e_motorJoint:
114 {
115 void* mem = allocator->Allocate(sizeof(b2MotorJoint));
116 joint = new (mem) b2MotorJoint(static_cast<const b2MotorJointDef*>(def));
117 }
118 break;
119
120 default:
121 b2Assert(false);
122 break;
123 }
124
125 return joint;
126}
127
128void b2Joint::Destroy(b2Joint* joint, b2BlockAllocator* allocator)
129{
130 joint->~b2Joint();
131 switch (joint->m_type)
132 {
133 case e_distanceJoint:
134 allocator->Free(joint, sizeof(b2DistanceJoint));
135 break;
136
137 case e_mouseJoint:
138 allocator->Free(joint, sizeof(b2MouseJoint));
139 break;
140
141 case e_prismaticJoint:
142 allocator->Free(joint, sizeof(b2PrismaticJoint));
143 break;
144
145 case e_revoluteJoint:
146 allocator->Free(joint, sizeof(b2RevoluteJoint));
147 break;
148
149 case e_pulleyJoint:
150 allocator->Free(joint, sizeof(b2PulleyJoint));
151 break;
152
153 case e_gearJoint:
154 allocator->Free(joint, sizeof(b2GearJoint));
155 break;
156
157 case e_wheelJoint:
158 allocator->Free(joint, sizeof(b2WheelJoint));
159 break;
160
161 case e_weldJoint:
162 allocator->Free(joint, sizeof(b2WeldJoint));
163 break;
164
165 case e_frictionJoint:
166 allocator->Free(joint, sizeof(b2FrictionJoint));
167 break;
168
169 case e_ropeJoint:
170 allocator->Free(joint, sizeof(b2RopeJoint));
171 break;
172
173 case e_motorJoint:
174 allocator->Free(joint, sizeof(b2MotorJoint));
175 break;
176
177 default:
178 b2Assert(false);
179 break;
180 }
181}
182
183b2Joint::b2Joint(const b2JointDef* def)
184{
185 b2Assert(def->bodyA != def->bodyB);
186
187 m_type = def->type;
188 m_prev = NULL;
189 m_next = NULL;
190 m_bodyA = def->bodyA;
191 m_bodyB = def->bodyB;
192 m_index = 0;
193 m_collideConnected = def->collideConnected;
194 m_islandFlag = false;
195 m_userData = def->userData;
196
197 m_edgeA.joint = NULL;
198 m_edgeA.other = NULL;
199 m_edgeA.prev = NULL;
200 m_edgeA.next = NULL;
201
202 m_edgeB.joint = NULL;
203 m_edgeB.other = NULL;
204 m_edgeB.prev = NULL;
205 m_edgeB.next = NULL;
206}
207
208bool b2Joint::IsActive() const
209{
210 return m_bodyA->IsActive() && m_bodyB->IsActive();
211}
212