[vtkusers] How to get color of pixel(or position) on colored polydata

[Tharun]

Thank you for the heads up.

I do know how to pick a position. But, i want to know the value of color at
a particular position. My actor consists of triangles and I can find
triangle picked. My current workflow is

1) Find triangle picked
2) Find Barycentric coordinates of position picked in the triangle.
3) Interpolate color of position from the colors of vertices of triangle
using Barycentric coordinates.

But, the color calculate is wrong at times.

I found that, in the actor I created, color inside triangle is interpolated
per pixel basis. But, I have no idea how is that done.




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