[vtkusers] VTK with JDK1.3.1_08

[Jeff Lee]

R K Shyamprakash wrote:

>Jeff,
>      I am running the application on Windows NT. I will test the same on
>Windows 2000 and check if it works.
>	One more thing. vtkPanel occasionally crashes(may be once in 150 times or
>so) in the Render() method. Below is the exact location where crash occurs
>  public synchronized void Render()
>  {
>    if (!rendering)
>      {
>        rendering = true;
>        if (ren.VisibleActorCount() == 0) {rendering = false; return;}
>        if (rw != null)
>          {
>            if (windowset == 0)
>              {
>                // set the window id and the active camera
>                cam = ren.GetActiveCamera();//here the application crashes
>
>	Is it because VTK is unable to find the active camera associated with
>vtkRenderer? Have you come across the same problem? below is the error
>message
>  
>
no, it is likely due to the fact that some other thread is manipulating 
the data while you are trying to access it from the renderer.  how does 
this happen - are you adding/removing SourceViewer from its parent?  the 
only time windowset= 0 is before the first render or when the panel gets 
removed and added-back.
-Jeff

>
>An unexpected exception has been detected in native code outside the VM.
>Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x24807FCD
>Function=vtkDataSetToPolyDataFilter::GetClassNameA+0x2577C
>Library=D:\apps\vtk42\bin\vtkFiltering.dll
>
>Current Java thread:
>	at vtk.vtkRenderer.GetActiveCamera_23(Native Method)
>	at vtk.vtkRenderer.GetActiveCamera(vtkRenderer.java:104)
>	at vtk.vtkPanel.Render(vtkPanel.java:125)
>	- locked <114A22A0> (a SourceViewer)
>	at SourceViewer.Render()(SourceViewer.java:171)
>	- locked <114A22A0> (a SourceViewer)
>Thanks
>Shyam
>
>  
>