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Interpolating TexCoords across a triangle in 3d

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I have a Triangle, T, each of its vertices has an axxociated texcoord. I have a point, P, inside the triangle, I want to know what would the texcoord be at P, sort of like how a tri with red, green and blue vertices gets interpolated color at a point inside it, depending on its distance from each of the 3 vertices. any help would be greatly appreciated. TIA

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you should look into barycentric coordinates

http://en.wikipedia.org/wiki/Barycentric_coordinates

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