[vtkusers] Colour a triangle

[Will Schroeder]

When you use float data, then the data is mapped through the lookup table 
and you should set the scalar range on the vtkMapper (or subclass such 
vtkPolyDataMapper). It's likely you're data was being clamped in the range 
(0,1) hence you were getting nothing but read and blue. When you use 
unsigned char data, the mapper assumes that the data is color data and does 
not map it through the lookup table (unless you set the appropriate 
override flag).
Will

At 06:54 PM 11/11/2002 +0900, Naoko TAKAYA wrote:
>Dear VTK-users,
>
>I've just solved the problem... sorry... ;-)
>
>But just one more thing.
>
>I changed the vtkFloatScalars to vtkUnsignedCharScalars to
>solve the problem, but why does vtkUnsignedCharScalars work
>and not vtkFloatScalars. although the coordinates are in
>float ?




William J. Schroeder, Ph.D
Kitware, Inc.
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