[vtkusers] Problem with vtkPanel

[Antoine Boivin]

Thanks for your help Jeff, Your solution are more secure but the problem
is not here. The use memory continue to increase during running of program.
I have make many test and I thinks that is the "Lock()" function of vtkPanel
which use memory and make the program instable.
I have modified vtkPanel.java for not use this function but I don't 
understand
the goal of this function.
My program run correctly, it's the main thing.

----- Original Message ----- 
From: "Jeff Lee" <jeff at cdnorthamerica.com>
To: "VTK-User" <vtkusers at vtk.org>
Sent: Wednesday, April 27, 2005 5:37 PM
Subject: Re: [vtkusers] Problem with vtkPanel


> Hi Antoine,
> When you change the texture on one thread and render on the event
> thread, you have the potential for a render to occur while you are
> changing the texture.  For example, say you start your UpdateImage
> thread, and it runs and schedules the Render on the event thread.  The
> render hasn't yet occured, and then you start the UpdateImage thread
> again.  Now you have the potential for a render to occur while you are
> changing the pipeline on another thread - bad things can happen.  I
> would guess that if you did something like
>
> SwingUtilities.invokeLater(new Runnable() {
>    public void run() {
>          for (int isurf = 0; isurf<vue.getSurfaces().size(); isurf++)
>          {
>            ((Surface)view.getSurfaces().get(isurf)).updateTabImage();
>          }
>          view.Render();
>        }
>      });
> then things would behave better, but your performance might degrade.  A
> more advanced solution would be to mutex the Render method with the
> method which updates the textures.  i.e. you cannot render while the
> textures are being updated.  You only have to mutex the part of
> updateTabImages which touch the vtk pipeline.  HTH,
> -Jeff
>
> Antoine Boivin wrote:
>
>> Hi vtk users!
>>  I use vtk with Java and I use a vtkPanel.
>> In the renderer of this vtkPanel I insert a surface with a texture.
>> In an other thread, I update this texture every time.
>> This program run correctly with a good frame rate
>> but some minutes ago, the surface disappear of the view.
>> I notice an increase of the memory use by the program
>> when the function "Render" of the vtkPanel are call.
>> That is the problem?
>>  I don't understand what occurs and why the texture disappear?
>>  This is the source of my Thread :
>>  public class UpdateImage extends Thread
>> {
>>  private view3D view; //view3D extends vtkPanel
>>   public boolean running=true;
>>   public boolean visu=true;
>>  public UpdateImage(View3D _view)
>>   {
>>     view = _view;
>>   }
>>  public void run()
>>   {     try
>>     {
>>       while(running)
>>       {
>>           for (int isurf = 0; isurf<vue.getSurfaces().size(); isurf++)
>>           {
>>             ((Surface)view.getSurfaces().get(isurf)).updateTabImage();
>>           }
>>           SwingUtilities.invokeAndWait(new Runnable()
>>           {
>>             public void run()
>>             {
>>               view.Render();
>>             }
>>           });
>>       }
>>     }
>>     catch (Exception e){
>>       System.out.println("Exception="+e);
>>     }
>>   }
>> }
>>  Thanks for your help!
>>  Antoine
>>
>>------------------------------------------------------------------------
>>
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