"Christopher James Huff" <cja### [at] gmailcom> wrote in message
news:cjameshuff-64B309.20125721022005@news.povray.org...
> It'd help if you gave a little more detail...for instance, maybe
> describing what you think such a feature would do.

1. A ray hits isosurface at point A = (x, y, z)
2. f(A) = (u, v, 0) = w
3. pigment(w)

For 2: To calculate u and v it is necessary to know the basis point (u = v =
0) on the surface of the isosurface and in which directions u, v are + or -.

This method is theoretically applicable for isosurfaces with 1 surface.
A more advanced algorithm can keep record of each separate surface
(iso-object) of the isosurface in database-like extensible structure. Every
iso-object will have its own basis point and directions for u, v(manually or
automatically set) and therefore own function for co-ordinates
transformation.

> As it is, you're essentially asking for "magic".
Is the above algorithm mathematically impossible(analytically and
numerically)?

Thank you,
William

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