Is there a way to “free-draw” a path in 3d space and determine a parametrically defined function Q[t] = {theta[t],phi[t],r[t]} and be able to convert back and forth between spherical and rectangular coordinates using openGL? Using NURBS one can determine the RHS of the parametric equation as we know the LHS is Q[t]. It is sort of like a reverse curve fitting algorithm where we are not using something like regression to determine the best fit curve for a set of data points, rather we draw a curve/path in 3d space and then determine the parametric function that most closely describes the path.
I’m afraid I don’t see what this has to do with OpenGL or the Mac…
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