请问osgBullet平台如何搭建呢？

天行剑

照着demo例子的配置试了好久了，还是没有成功搭建自己的osgBullet平台，总是出现error LNK2019: 无法解析的外部符号，求搭建成功的大神们指点指点啊！不尽感激

array

您没有给出足够的信息，我无法判断什么

天行剑

array 发表于 2013-7-16 09:50
您没有给出足够的信息，我无法判断什么

array你好！目前我的osgBullet环境已经搭建好了，但是把如下代码添加进osgBullet后就会出现图示错误，根据以往经验我怀疑是读取文件时路径错误，可是我又不知道如何把对应路径的文件正确添加进去（在没有使用osgBullet时我使用osg都是直接使用data文件夹中的模型文件的，但是现在我不知道这样做是不是还有效了），请您指点指点啊

1. #include <osgDB/ReadFile>
   
2. #include <osgViewer/Viewer>
   
3. #include <osg/MatrixTransform>
   
4. #include <osg/ShapeDrawable>
   
5. #include <osg/Geode>
   
6. 
   
7. #include <osgbDynamics/MotionState.h>
   
8. #include <osgbCollision/CollisionShapes.h>
   
9. #include <osgbDynamics/RigidBody.h>
   
10. #include <osgbCollision/Utils.h>
    
11. 
    
12. #include <btBulletDynamicsCommon.h>
    
13. 
    
14. #include <string>
    
15. #include <osg/io_utils>
    
16. 
    
17. 
    
18. 
    
19. osg::MatrixTransform*
    
20. makeDie( btDynamicsWorld* bw )
    
21. {
    
22.     osg::MatrixTransform* root = new osg::MatrixTransform;
    
23.         //const std::string fileName( "dice.osg" );
    
24.         const std::string fileName( "cow.osg" );
    
25.     osg::Node* node = osgDB::readNodeFile( fileName );
    
26.         if( node == NULL )
    
27.         {
    
28.                 osg::notify( osg::FATAL ) << "Can't find "" << fileName << "". Make sure OSG_FILE_PATH includes the osgBullet data directory." << std::endl;
    
29.                 exit( 0 );
    
30.         }
    
31.     root->addChild( node );
    
32. 
    
33.     btCollisionShape* cs = osgbCollision::btBoxCollisionShapeFromOSG( node );
    
34.    
    
35.     osg::ref_ptr< osgbDynamics::CreationRecord > cr = new osgbDynamics::CreationRecord;
    
36.     cr->_sceneGraph = root;
    
37.     cr->_shapeType = BOX_SHAPE_PROXYTYPE;
    
38.     cr->_mass = 1.f;
    
39.     cr->_restitution = 1.f;
    
40.     btRigidBody* body = osgbDynamics::createRigidBody( cr.get(), cs );
    
41.     bw->addRigidBody( body );
    
42. 
    
43.     return( root );
    
44. }
    
45. 
    
46. 
    
47. btDynamicsWorld*
    
48. initPhysics()
    
49. {
    
50.     btDefaultCollisionConfiguration * collisionConfiguration = new btDefaultCollisionConfiguration();
    
51.     btCollisionDispatcher * dispatcher = new btCollisionDispatcher( collisionConfiguration );
    
52.     btConstraintSolver * solver = new btSequentialImpulseConstraintSolver;
    
53. 
    
54.     btVector3 worldAabbMin( -10000, -10000, -10000 );
    
55.     btVector3 worldAabbMax( 10000, 10000, 10000 );
    
56.     btBroadphaseInterface * inter = new btAxisSweep3( worldAabbMin, worldAabbMax, 1000 );
    
57. 
    
58.     btDynamicsWorld * dynamicsWorld = new btDiscreteDynamicsWorld( dispatcher, inter, solver, collisionConfiguration );
    
59. 
    
60.     dynamicsWorld->setGravity( btVector3( 0, 0, 9.8 ) );
    
61. 
    
62.     return( dynamicsWorld );
    
63. }
    
64. 
    
65. 
    
66. /* \cond */
    
67. class ShakeManipulator : public osgGA::GUIEventHandler
    
68. {
    
69. public:
    
70.     ShakeManipulator( osgbDynamics::MotionState* motion )
    
71.       : _motion( motion )
    
72.     {}
    
73. 
    
74.     bool handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& )
    
75.     {
    
76.         switch( ea.getEventType() )
    
77.         {
    
78.             case osgGA::GUIEventAdapter::KEYUP:
    
79.             {
    
80.                 if (ea.getKey()==osgGA::GUIEventAdapter::KEY_Space)
    
81.                 {
    
82.                     btTransform trans; trans.setIdentity();
    
83.                     _motion->setWorldTransform( trans );
    
84. 
    
85.                     return true;
    
86.                 }
    
87. 
    
88.                 return false;
    
89.             }
    
90. 
    
91.             case osgGA::GUIEventAdapter::PUSH:
    
92.             {
    
93.                 _lastX = ea.getXnormalized();
    
94.                 _lastY = ea.getYnormalized();
    
95. 
    
96.                 btTransform world;
    
97.                 _motion->getWorldTransform( world );
    
98.                 btVector3 o = world.getOrigin();
    
99.                 o[ 2 ] = 0.25;
    
100.                 world.setOrigin( o );
     
101.                 _motion->setWorldTransform( world );
     
102. 
     
103.                 return true;
     
104.             }
     
105.             case osgGA::GUIEventAdapter::DRAG:
     
106.             {
     
107.                 btVector3 move;
     
108.                 move[ 0 ] = _lastX - ea.getXnormalized();
     
109.                 move[ 1 ] = ea.getYnormalized() - _lastY;
     
110.                 move[ 2 ] = 0.;
     
111.                 move *= 10.;
     
112.                 btTransform moveTrans; moveTrans.setIdentity();
     
113.                 moveTrans.setOrigin( move );
     
114.                 btTransform world;
     
115.                 _motion->getWorldTransform( world );
     
116.                 btTransform netTrans = moveTrans * world;
     
117.                 btVector3 o = netTrans.getOrigin();
     
118.                 o[ 2 ] = 0.;
     
119.                 netTrans.setOrigin( o );
     
120. 
     
121.                 _motion->setWorldTransform( netTrans );
     
122. 
     
123.                 _lastX = ea.getXnormalized();
     
124.                 _lastY = ea.getYnormalized();
     
125. 
     
126.                 return true;
     
127.             }
     
128.             default:
     
129.             break;
     
130.         }
     
131.         return false;
     
132.     }
     
133. 
     
134. protected:
     
135.     osgbDynamics::MotionState* _motion;
     
136.     float _lastX, _lastY;
     
137. };
     
138. /* \endcond */
     
139. 
     
140. 
     
141. 
     
142. 
     
143. osg::Geode* osgBox( const osg::Vec3& center, const osg::Vec3& halfLengths )
     
144. {
     
145.     osg::Vec3 l( halfLengths * 2. );
     
146.     osg::Box* box = new osg::Box( center, l.x(), l.y(), l.z() );
     
147.     osg::ShapeDrawable* shape = new osg::ShapeDrawable( box );
     
148.     shape->setColor( osg::Vec4( 1., 1., 1., 1. ) );
     
149.     osg::Geode* geode = new osg::Geode();
     
150.     geode->addDrawable( shape );
     
151.     return( geode );
     
152. }
     
153. 
     
154. 
     
155. 
     
156. int
     
157. main( int argc,
     
158.       char ** argv )
     
159. {
     
160.     btDynamicsWorld* bulletWorld = initPhysics();
     
161.     osg::Group* root = new osg::Group;
     
162. 
     
163.     root->addChild( makeDie( bulletWorld ) );
     
164.     root->addChild( makeDie( bulletWorld ) );
     
165. 
     
166. 
     
167.     /* BEGIN: Create environment boxes */
     
168.     float xDim( 10. );
     
169.     float yDim( 10. );
     
170.     float zDim( 6. );
     
171.     float thick( .1 );
     
172. 
     
173.     osg::MatrixTransform* shakeBox = new osg::MatrixTransform;
     
174.     btCompoundShape* cs = new btCompoundShape;
     
175.     { // floor -Z (far back of the shake cube)
     
176.         osg::Vec3 halfLengths( xDim*.5, yDim*.5, thick*.5 );
     
177.         osg::Vec3 center( 0., 0., zDim*.5 );
     
178.         shakeBox->addChild( osgBox( center, halfLengths ) );
     
179.         btBoxShape* box = new btBoxShape( osgbCollision::asBtVector3( halfLengths ) );
     
180.         btTransform trans; trans.setIdentity();
     
181.         trans.setOrigin( osgbCollision::asBtVector3( center ) );
     
182.         cs->addChildShape( trans, box );
     
183.     }
     
184.     { // top +Z (invisible, to allow user to see through; no OSG analogue
     
185.         osg::Vec3 halfLengths( xDim*.5, yDim*.5, thick*.5 );
     
186.         osg::Vec3 center( 0., 0., -zDim*.5 );
     
187.         //shakeBox->addChild( osgBox( center, halfLengths ) );
     
188.         btBoxShape* box = new btBoxShape( osgbCollision::asBtVector3( halfLengths ) );
     
189.         btTransform trans; trans.setIdentity();
     
190.         trans.setOrigin( osgbCollision::asBtVector3( center ) );
     
191.         cs->addChildShape( trans, box );
     
192.     }
     
193.     { // left -X
     
194.         osg::Vec3 halfLengths( thick*.5, yDim*.5, zDim*.5 );
     
195.         osg::Vec3 center( -xDim*.5, 0., 0. );
     
196.         shakeBox->addChild( osgBox( center, halfLengths ) );
     
197.         btBoxShape* box = new btBoxShape( osgbCollision::asBtVector3( halfLengths ) );
     
198.         btTransform trans; trans.setIdentity();
     
199.         trans.setOrigin( osgbCollision::asBtVector3( center ) );
     
200.         cs->addChildShape( trans, box );
     
201.     }
     
202.     { // right +X
     
203.         osg::Vec3 halfLengths( thick*.5, yDim*.5, zDim*.5 );
     
204.         osg::Vec3 center( xDim*.5, 0., 0. );
     
205.         shakeBox->addChild( osgBox( center, halfLengths ) );
     
206.         btBoxShape* box = new btBoxShape( osgbCollision::asBtVector3( halfLengths ) );
     
207.         btTransform trans; trans.setIdentity();
     
208.         trans.setOrigin( osgbCollision::asBtVector3( center ) );
     
209.         cs->addChildShape( trans, box );
     
210.     }
     
211.     { // bottom of window -Y
     
212.         osg::Vec3 halfLengths( xDim*.5, thick*.5, zDim*.5 );
     
213.         osg::Vec3 center( 0., -yDim*.5, 0. );
     
214.         shakeBox->addChild( osgBox( center, halfLengths ) );
     
215.         btBoxShape* box = new btBoxShape( osgbCollision::asBtVector3( halfLengths ) );
     
216.         btTransform trans; trans.setIdentity();
     
217.         trans.setOrigin( osgbCollision::asBtVector3( center ) );
     
218.         cs->addChildShape( trans, box );
     
219.     }
     
220.     { // bottom of window -Y
     
221.         osg::Vec3 halfLengths( xDim*.5, thick*.5, zDim*.5 );
     
222.         osg::Vec3 center( 0., yDim*.5, 0. );
     
223.         shakeBox->addChild( osgBox( center, halfLengths ) );
     
224.         btBoxShape* box = new btBoxShape( osgbCollision::asBtVector3( halfLengths ) );
     
225.         btTransform trans; trans.setIdentity();
     
226.         trans.setOrigin( osgbCollision::asBtVector3( center ) );
     
227.         cs->addChildShape( trans, box );
     
228.     }
     
229.     /* END: Create environment boxes */
     
230. 
     
231.     osgbDynamics::MotionState * shakeMotion = new osgbDynamics::MotionState();
     
232.     shakeMotion->setTransform( shakeBox );
     
233.     btScalar mass( 0.0 );
     
234.     btVector3 inertia( 0, 0, 0 );
     
235.     btRigidBody::btRigidBodyConstructionInfo rb( mass, shakeMotion, cs, inertia );
     
236.     btRigidBody* shakeBody = new btRigidBody( rb );
     
237.     shakeBody->setCollisionFlags( shakeBody->getCollisionFlags() | btCollisionObject::CF_KINEMATIC_OBJECT );
     
238.     shakeBody->setActivationState( DISABLE_DEACTIVATION );
     
239.     bulletWorld->addRigidBody( shakeBody );
     
240. 
     
241.     root->addChild( shakeBox );
     
242. 
     
243.     osgViewer::Viewer viewer;
     
244.     viewer.setUpViewInWindow( 150, 150, 400, 400 );
     
245.     viewer.setSceneData( root );
     
246.     viewer.getCamera()->setViewMatrixAsLookAt(
     
247.         osg::Vec3( 0, 0, -20 ), osg::Vec3( 0, 0, 0 ), osg::Vec3( 0, 1, 0 ) );
     
248.     viewer.getCamera()->setProjectionMatrixAsPerspective( 40., 1., 1., 50. );
     
249.     viewer.addEventHandler( new ShakeManipulator( shakeMotion ) );
     
250. 
     
251.     viewer.realize();
     
252.     double prevSimTime = 0.;
     
253.     while( !viewer.done() )
     
254.     {
     
255.         const double currSimTime = viewer.getFrameStamp()->getSimulationTime();
     
256.         double elapsed( currSimTime - prevSimTime );
     
257.         if( viewer.getFrameStamp()->getFrameNumber() < 3 )
     
258.             elapsed = 1./60.;
     
259.         //osg::notify( osg::ALWAYS ) << elapsed / 3. << ", " << 1./180. << std::endl;
     
260.         bulletWorld->stepSimulation( elapsed, 4, elapsed/4. );
     
261.         prevSimTime = currSimTime;
     
262.         viewer.frame();
     
263.     }
     
264. 
     
265.     return( 0 );
     
266. }

复制代码

liuzhiyu123

自己一步一步调试吧  这么长的代码 我们猜不到啊

天行剑

liuzhiyu123 发表于 2013-8-9 08:16
自己一步一步调试吧  这么长的代码 我们猜不到啊

这段代码是我原文引用osgBullet例子里面的，在demo里面运行可以，可是复制到我自己搭建的osgBullet环境里面运行就会出错，但是调试时候还不报错

liuzhiyu123

不是 release 和 debug 版本的库 混用了吧

天行剑

liuzhiyu123 发表于 2013-8-9 16:33
不是 release 和 debug 版本的库 混用了吧

谢谢提醒！

天行剑

liuzhiyu123 发表于 2013-8-9 16:33
不是 release 和 debug 版本的库 混用了吧

这个问题解决了，可还是不行，出现这样的警告：
osgBullet.exe 中的 0x778e15de 处有未经处理的异常: 0xC0000005: 读取位置 0x00000004 时发生访问冲突
请问这个是不是模型读取路径问题呢？