[WillAdams]

OpenSCAD is great for things which one knows how to describe mathematically, but that puts a sharp bound on the possibilities for most folks.

My latest query in to the OpenSCAD mailing list is:

>How does one represent a 3 dimensional Bézier curve in OpenSCAD? How would that be extended so as to create an entire surface/object?

and my current project is wending its way down to doing wood joinery which seems to require conic sections (suggestions for texts to read for formulae which will calculate more quickly than the chained trigonometric calculations which only got me half-way or so?)