I've been borderline homicidal about 3 times with long lists fed to the param viewer while my screen stuttered as if I were on a 486 with 4mb of RAM playing "Full Throttle". I must've got smarter since last I worked on this…
I create Isocurves at a slope(v/u) making a set of parallel curves on the surface. I then subdivide the curves into segments and connect the subdivision points with a polyline. I then extrude the polyline to create planar surfaces intersecting with…