[JAVA3D] Canvas3D native exception

[嚙緘嚙踝蕭菇]

hi,       I design a Observer Pattern to sperate logic and presentation operation     about the "Observer" part,     I use a state pattern for change different view with Java3D (class called ""ViewState")     thus, when the logic operation Notify(),     then the Update() would be invoked in ViewState     the ViewState will update current scene :       Transform3D trans = new Transform3D();     if (objRoot.numChildren() != 0) {       ( (TransformGroup) objRoot.getChild(0)).getTransform(trans);     }       BranchGroup newRoot = new BranchGroup();     newRoot.setCapability(BranchGroup.ALLOW_DETACH);     newRoot.setCapability(BranchGroup.ALLOW_CHILDREN_READ);       pickCanvas = new PickCanvas(c, newRoot);     pickCanvas.setMode(PickTool.GEOMETRY_INTERSECT_INFO);     pickCanvas.setTolerance(1.0f);       TransformGroup newTG = createTG_of_Shape();     newTG.setTransform(trans);     newRoot.addChild(newTG);     createMouseBehavior(newTG, newRoot);     newRoot.compile();     u.getLocale().replaceBranchGraph(objRoot, newRoot);       objRoot = newRoot;       createTG_of_Shape() is abstract method and implement in derive sub classes     these different sub view classes will return the TransformGroup of the current scene of the current view     the Canvas3D (as c), SimpleUniverse (as u), BranchGroup (as objRoot) and PickCanvas (as pickCanvas)     are static field in ViewState for keeping the current Transform     because avoid that if the view is changed,     the state pattern will new another view subclass and lose the current Transform     in the other hand, that will retrench the time and resource when change view without     new Canvas3D, SimpleUniverse, BranchGroup and PickCanvas again.         everything is ok but............       now, when change to a specific view of the sub view classes (called "ModelControlView")     I will let it open another JFrame for render something of Java3D (called "CutPlaneWin")     and close it when change to another view again.     so I add the following code in ModeControlView constructor     public ModelControlView(UIController ctrl) {       ....     planeWin = new CutPlaneWin(...);  /** open the CutPlaneWin     Update();   }       and close the planeWin in changToXXXXView(...)       the CutPlaneWin handle Canvas3D, SimpleUniverse, BranchGroup, PickCanvas and JFrame     in construtor,     it initiates the j3d objects, and then add somthing to the scene, and then add the Canvas3D to JFrame     finailly show the JFrame       but it always happens the native exception in Canvas3D when change to ModelControlView,     that's my trouble! why?       I post it as the following...     thanks all.                                                                                                                             Y.P. Liao   -----------------------------------------------------------------------------------------------------------   An unexpected exception has been detected in native code outside the VM. Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x0 Function=[Unknown.] Library=(N/A)   NOTE: We are unable to locate the function name symbol for the error       just occurred. Please refer to release documentation for possible       reason and solutions.   Current Java thread:  at javax.media.j3d.Canvas3D.setProjectionMatrix(Native Method)  at javax.media.j3d.Renderer.doWork(Renderer.java:1237)  at javax.media.j3d.J3dThread.run(J3dThread.java:250)   Dynamic libraries: 0x00400000 - 0x00406000  C:\JBuilder8\jdk1.4\bin\javaw.exe 0x77F80000 - 0x77FFB000  C:\WINNT\System32\ntdll.dll 0x77D90000 - 0x77DEB000  C:\WINNT\system32\ADVAPI32.dll 0x77E60000 - 0x77F31000  C:\WINNT\system32\KERNEL32.dll 0x786F0000 - 0x78761000  C:\WINNT\system32\RPCRT4.dll 0x77DF0000 - 0x77E4F000  C:\WINNT\system32\USER32.dll 0x77F40000 - 0x77F79000  C:\WINNT\system32\GDI32.dll 0x78000000 - 0x78046000  C:\WINNT\system32\MSVCRT.dll 0x75E00000 - 0x75E1A000  C:\WINNT\System32\IMM32.DLL 0x6D330000 - 0x6D45C000  C:\JBuilder8\jdk1.4\jre\bin\client\jvm.dll 0x77530000 - 0x77560000  C:\WINNT\System32\WINMM.dll 0x6D1D0000 - 0x6D1D7000  C:\JBuilder8\jdk1.4\jre\bin\hpi.dll 0x6D300000 - 0x6D30D000  C:\JBuilder8\jdk1.4\jre\bin\verify.dll 0x6D210000 - 0x6D229000  C:\JBuilder8\jdk1.4\jre\bin\java.dll 0x6D320000 - 0x6D32D000  C:\JBuilder8\jdk1.4\jre\bin\zip.dll 0x136F0000 - 0x13705000  C:\work\FEM3D\ConcreteAnalysis.dll 0x32600000 - 0x32762000  C:\work\FEM3D\CC3260.DLL 0x6D000000 - 0x6D0FA000  C:\JBuilder8\jdk1.4\jre\bin\awt.dll 0x777C0000 - 0x777DE000  C:\WINNT\System32\WINSPOOL.DRV 0x75010000 - 0x75020000  C:\WINNT\system32\MPR.dll 0x77A30000 - 0x77B25000  C:\WINNT\system32\ole32.dll 0x6D180000 - 0x6D1D0000  C:\JBuilder8\jdk1.4\jre\bin\fontmanager.dll 0x51000000 - 0x51044000  C:\WINNT\System32\ddraw.dll 0x727A0000 - 0x727A6000  C:\WINNT\System32\DCIMAN32.dll 0x72C90000 - 0x72D03000  C:\WINNT\System32\D3DIM.DLL 0x6E260000 - 0x6E266000  C:\WINNT\System32\INDICDLL.dll 0x63000000 - 0x63014000  C:\WINNT\System32\SynTPFcs.dll 0x777E0000 - 0x777E7000  C:\WINNT\system32\VERSION.dll 0x75950000 - 0x75956000  C:\WINNT\system32\LZ32.DLL 0x1C540000 - 0x1C562000  C:\JBuilder8\jdk1.4\jre\bin\J3D.dll 0x692D0000 - 0x69397000  C:\WINNT\System32\OPENGL32.dll 0x6F920000 - 0x6F93F000  C:\WINNT\System32\GLU32.dll 0x6D230000 - 0x6D235000  C:\JBuilder8\jdk1.4\jre\bin\jawt.dll 0x1C680000 - 0x1C838000  C:\WINNT\System32\ialmgicd.dll 0x1C970000 - 0x1C996000  C:\WINNT\System32\ialmgdev.dll 0x24AC0000 - 0x24AED000  C:\Program Files\Dreye\PeaDict\Api\dictnt.dll 0x78F90000 - 0x791D4000  C:\WINNT\system32\shell32.dll 0x77C50000 - 0x77C9A000  C:\WINNT\system32\SHLWAPI.dll 0x77B30000 - 0x77BB9000  C:\WINNT\system32\COMCTL32.dll 0x77990000 - 0x77A2B000  C:\WINNT\system32\OLEAUT32.DLL 0x72BF0000 - 0x72C75000  C:\WINNT\System32\CLBCATQ.DLL 0x77810000 - 0x7784D000  C:\WINNT\System32\cscui.dll 0x77080000 - 0x770A3000  C:\WINNT\System32\CSCDLL.DLL 0x76DB0000 - 0x76DC1000  C:\WINNT\System32\mydocs.dll 0x71500000 - 0x71611000  C:\WINNT\System32\SHDOCVW.DLL 0x76F60000 - 0x76F6F000  C:\WINNT\System32\ntshrui.dll 0x773A0000 - 0x773B5000  C:\WINNT\System32\ATL.DLL 0x75100000 - 0x7514F000  C:\WINNT\System32\NETAPI32.DLL 0x77BC0000 - 0x77BCF000  C:\WINNT\System32\Secur32.dll 0x75150000 - 0x75156000  C:\WINNT\System32\NETRAP.dll 0x750E0000 - 0x750F0000  C:\WINNT\System32\SAMLIB.dll 0x74FB0000 - 0x74FC3000  C:\WINNT\System32\WS2_32.dll 0x74FA0000 - 0x74FA8000  C:\WINNT\System32\WS2HELP.DLL 0x77930000 - 0x77958000  C:\WINNT\system32\WLDAP32.dll 0x77960000 - 0x77984000  C:\WINNT\System32\DNSAPI.dll 0x74FD0000 - 0x74FDA000  C:\WINNT\System32\WSOCK32.dll 0x750F0000 - 0x750FC000  C:\WINNT\System32\ntlanman.dll 0x751A0000 - 0x751B5000  C:\WINNT\System32\NETUI0.DLL 0x75160000 - 0x75198000  C:\WINNT\System32\NETUI1.DLL 0x77900000 - 0x77923000  C:\WINNT\system32\imagehlp.dll 0x72900000 - 0x7292D000  C:\WINNT\system32\DBGHELP.dll 0x68E00000 - 0x68E0B000  C:\WINNT\System32\PSAPI.DLL   Local Time = Sun Apr 13 01:37:55 2003 Elapsed Time = 31 # # The exception above was detected in native code outside the VM # # Java VM: Java HotSpot(TM) Client VM (1.4.1-b21 mixed mode) #