Problemm with blanking points in a StructuredGrid

[Jerome, Ron]

Martin, 

I also ran into the same thing, and have been meaning to debug the problem,
but time has not permitted.  One workaround is to get an older version of
vtkStructuredGridGeometryFilter.  You will find a version distributed with
the 2.3 source called #vtkStructuredGridGeometryFilter.cxx.1.31 in the
graphics sub directory.

 
Ron Jerome
National Research Council Canada
Rm. 241, Bldg. M-12
1500 Montreal Road 
Ottawa, ON  K1A 0R6

1-613-993-5346
ron.jerome at nrc.ca <mailto:ron.jerome at nrc.ca> 


		-----Original Message-----
		From:	Martin Weinberg
[mailto:weinberg at osprey.astro.umass.edu]
		Sent:	Saturday, November 13, 1999 3:55 PM
		To:	vtkusers at gsao.med.ge.com
		Cc:	weinberg at osprey.astro.umass.edu
		Subject:	Problemm with blanking points in a
StructuredGrid

		Folks,

		I have two-dimensional gridded data with some points missing
and
		want to render isovalues.  I created a StructuredGrid using
the
		example code (pg. 145) with dims[2]=1 as a model.  I used
		BlankPoint to toggle those points.

		The problem is that the wrong points appear to be blanked!
		It seems as if the StructuredGridGeometryFilter code is
		is confused about which cells have the blanked points.  If I

		don't blank any points, no problems.  I used used GetPoint
		and IsPointVisible to check that the desired points are
indeed
		being blanked.

		Any ideas/suggestions?

		--Martin

	
===========================================================================

		Martin Weinberg                      Phone: (413) 545-3821
		Dept. of Physics and Astronomy       FAX:   (413)
545-2117/0648
		530 Graduate Research Tower
weinberg at astro.umass.edu
		University of Massachusetts
http://www.astro.umass.edu/~weinberg/
		Amherst, MA  01003-4525





	
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