[vtkusers] coloring the isosurface

[Soumya]

Hello All,

I have two questions:

1. How can I set a specific color to isosurfaces created by
vtkcontourfilter. I can use the scalar value to color it, but I will need a
constant color also. 

2. Currently when I use scalar range to color the surfaces the color map
seems low to high -> red to blue. How can I flip this and make the change
the color map so that low values are mapped to blue and high values are
mapped to red. 

Thanks a lot for your time,
Soumya



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