[vtkusers] Land topography with distinct colors

[mcsalas at chilesat.net]

Hi, i make a land topography of a txt file (x, y, z) . I reading the coords,
and then triangulate with Dealunay2D (thank's a Sebastien MARAUX) and render
the surface. this Ok.

The problem now is:

Depending the z Coord, the surface need show with distinct colors, p.e.

z < 1.4 = green
1.5 < z < 2 = blue
2 < z = red

How make this and conserving the form of the original surface??

any code example or suggestions please..

Best Regards,

Max from chile
mcsalas at chilesat.net