[Paraview] Suggestion for Storing Colors for a Polygonal Mesh

[Michael Jackson]

I am in the early stages of designing a new filter that is supposed to  
color triangles based on their normal where the normal is used as an  
input to the filter and a unique color is output for each triangle.

   My questions are:
    Where should I store the color information? As a new set of  
"Scalars" or as Vectors as attribute data for the cells? Also, is  
there a "Standard" that is used to store the Normals for Polygonal  
data (vtkPolyData)? Are they always in an attribute data array called  
"Normals"? I was thinking I need to check first to see if the correct  
type of normals are included already and if not then generate the  
normals during the filter.

Thanks for any help or suggestions.
___________________________________________________________
Mike Jackson                      www.bluequartz.net
Principal Software Engineer       mike.jackson at bluequartz.net
BlueQuartz Software               Dayton, Ohio