[vtkusers] VTK and Garbage Collection

[R K Shyamprakash]

Jeff,
	I did use SwingWorker. Say, I am loading an object into my VTK+JAVA
application. This takes few seconds during which my Java repaint thread is
blocked(Considering I call VTK objects from the event thread). If I call the
same objects from a SwingWorker, the repaint problem seems to have reduced.
the object loads well into vtkCanvas but as soon as I move my mouse over it
VTK throws following error.

ERROR:vtkWin32OpenGLRenderWindow
vtkWin32OpenGLRenderWindow:wglMakeCurrent failed.

I have applied locks where ever necessary. I don't get this problem when I
run the application from the event dispatching thread. Is there any work
around for this?

Thanks
Shyam



-----Original Message-----
From: vtkusers-admin at public.kitware.com
[mailto:vtkusers-admin at public.kitware.com]On Behalf Of Jeff Lee
Sent: Thursday, May 29, 2003 3:58 PM
To: R K Shyamprakash
Cc: Vtkusers (E-mail)
Subject: Re: [vtkusers] VTK and Garbage Collection




R K Shyamprakash wrote:

>Hi,
>        My VTK  application becomes slower after few operations and
>sometimes it locks the processor. How can I garbage collect VTK objects so
>that serious memory concerns does not arise.
>
how do you know that the slowdown is related to memory consumption?  vtk
objects, as all java objects are garbage collected when they are no
longer referenced by any other object.  do you notice an increase in
performance after garbage collection runs?

>	I am using VTK 4.2 with Java. Also the Java component have repaint problem
>when an intensive vtk operation is going on. Is there any work around for
>this.
>
common problem due to the fact that you are likely tying up the event
thread with your calculation.  there are a variety of solutions to this,
one being to thread the calculation.  look for the SwingWorker class on
java website for more details.
Jeff

>
>Thanks
>Shyam
>
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