TinCanMan wrote:
> I don't know how the vertices and normals are interpolated for a
> triangle, but if it is a simple surface that can be described using
> some type of equation, then perhaps that equation can be put into an
> isosurface function.

I assume the normals of a smooth_triangle are linearly interpolated.

Hm: you have three known zeros (i.e. f(x0,y0,z0) = f(x1,y1,z1) =
f(x2,y2,z2) = 0) and nine partial derivatives, to which you can fit a
polynomial function -- but then you'll have to clip this iso into a
prism or pyramid whose shape may not be so easy to determine.

-- 
Anton Sherwood, http://www.ogre.nu/

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