Extrude-Transform Polygons: Rose-Knot

Extended the extrude/transform module so that the slices don't stay in the X-Y plane and are instead normal to the curve the extrusion follows.

Branched out from sines to include a parabolic function, for the demo object, making a kind of rose or knot.

The 3D shape is a little complicated, so I decided to create a mild anaglyph of it. The gray-scale image can be enjoyed with the naked eye, but if you have a pair of blue/red glasses lying around, you can see it in 3D!