[vtkusers] Using vtkLassooStencilSource

[Alexis Cheng]

Hi David,

Thanks for making these classes, I'll try out vtkROIStencilSource after I fix this error. I must have accidentally left out the end of the error message:

ERROR: In ..\..\VTK\Common\vtkMultiThreader.cxx, line 285
 vtkMultiThreader [605C96A0]: Error in thread creation !!!

Looking at the windows task manager, it seems like my physical memory is decreasing at a constant rate until the error occurs. I suspect that there is likely a memory leak in my code somewhere. I assume that should also account for the thread creation error.

Many Thanks,
Alexis Cheng
Electrical Engineering
University of British Columbia





> From: david.gobbi at gmail.com
> Date: Sat, 6 Nov 2010 16:09:06 -0600
> Subject: Re: [vtkusers] Using vtkLassooStencilSource
> To: acheng_1221 at hotmail.com
> CC: vtkusers at vtk.org
> 
> Hi Alexis,
> 
> Thanks for trying this out.  Your code for using the class is correct.
> 
> For the first message, the one vtkMultiThreader.cxx, does it give any
> sort of error info?
> 
> The second error about memory allocation is a strange one, it is
> complaining about allocating 1231041 bytes which is only about the
> size of one video frame.  Try using the Windows Task Manager to see
> how your computer's memory use increases when you run your
> application.
> 
> About Slicer, yes you generally should rebuild after updating VTK.  To
> be more specific, it is only certain changes to the VTK header files
> that will make a rebuild necessary, but better safe than sorry.
> 
>    David
> 
> 
> On Sat, Nov 6, 2010 at 3:11 PM, Alexis Cheng <acheng_1221 at hotmail.com> wrote:
> > Hi David,
> >
> > I can certainly provide an informal review of vtkLassooStencilSource and
> > vtkROIStencilSource, but first, I'm receiving an odd error during runtime.
> >
> > I'm using vtkLassooStencilSource and generating the stencil like this:
> >
> >         vtkSmartPointer<vtkLassooStencilSource> LassooStencil =
> > vtkSmartPointer<vtkLassooStencilSource>::New();
> >         LassooStencil->SetPoints(points);
> >         LassooStencil->SetInformationInput(MTImage);
> >
> >         vtkSmartPointer<vtkImageBlend> blend1 =
> > vtkSmartPointer<vtkImageBlend>::New();
> >         blend1->SetStencil(LassooStencil->GetOutput());
> >         blend1->AddInput(MTImage);
> >         blend1->AddInput(BlackImage);
> >
> > I'm interfacing with 3D Slicer and can see the stencil within my image. It's
> > also running many times faster than when I generated the stencil using
> > vtkImplicitFunctionToStencilData. However, after several minutes, a
> > vtkOutputWindow pops up indicating:
> >
> > ERROR: In ..\..\VTK\Common\vtkMultiThreader.cxx, line 285
> > vtkMultiThreader [605C96A0]
> >
> > The above message is repeated a number of times before ending with:
> >
> > ERROR: In c:\sliver3-lib\vtk\common\vtkDataArrayTemplate.txx, line 142
> > vtkUnsignedCharArray [605D3490]: Unable to allocate 1231041 elements of (The
> > rest of the message is out of view of the window)
> >
> > This did not occur with vtkImplicitFunctionToStencilData. Do you have any
> > idea if this error is related to these new classes? Also, do I have to
> > rebuild Slicer every time I modify the VTK package?
> >
> > Thanks,
> > Alexis Cheng
> > Electrical Engineering
> > University of British Columbia
> >
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