[vtkusers] Error in vtkQuad associated with problem with vtkCellDerivatives
strelitz at lanl.gov
Thu Sep 7 10:34:39 EDT 2000
I have been having problems with vtkCellDerivatives in that it
unfailingly returns values of "0" regardless of the actual values
of the data. I was using it with a unstructured grid from which
I had extracted a layer. Each cell was thus a vtkQuad.
The computation of the derivatives depends on the method
cell->Derivatives(subid, pcoords, scalars, dim, derivs)
In the process of executing, on line 678 in vtkQuad, the value
of the sum is computed as += funcDerivs(3+i)*values[dim*i+j]
**** I am pretty sure that it should be funcDerivs(4+i) ***
but, I am also pretty sure that that is not the sole source of my trouble.
Has anyone else had dealings with this??
(Just for the record, I am using the latest donwload, but the vtkQuad.cxx
module is Version: $Revision 1.6.3 $ of 2000/02/04 17:03:44 $
SciVis Staff , LANL CCS (nee ACL)
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