[vtkusers] ActiViz vtkImagePlaneWidget

[Oksnevad, Bjorn]

Hello,
I received support from Kitware (thanks David Cole) and wanted to contribute back to the user list.

When using ActiViz, it is important to hold .NET managed references to vtk objects or objects used by vtk objects.  Skipping this step often will result in AccessViolationExceptions where .NET performs garbage collection on memory that is still being used by VTK.  This is especially necessary for .NET event handlers.

Cheers,
Bjorn

________________________________
From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf Of Oksnevad, Bjorn
Sent: Monday, February 21, 2011 4:06 PM
To: vtkusers at vtk.org
Subject: [vtkusers] ActiViz vtkImagePlaneWidget

Hello,
I am new to ActiViz as well as new to the user group.
I am trying to use the vtkImagePlaneWidget to view a custom format MRI data source.  The plane is rendered for the first view successfully.  When I start to interact with the plane, I get the following exception:

System.AccessViolationException was unhandled
  Message="Attempted to read or write protected memory. This is often an indication that other memory is corrupt."

Does anyone have tips on how to read image data from file using C# and then transferring the data to a vtkImageData object and setting up the vtkImagePlaneWidget?

Thanks!
Bjorn



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