I am making a cutters library that will be used thousands of times with BooleanDiff. When Rhino tries to do the NURBS math for intersections, what type of surface is better? Is a degree 3/20 control point surface faster than a degree 8/9 control point surface?
When I say better, is speed and error rate one is the same? If I had to choose, I would like the least likely to fail option.
Here is an example of 3 options I have for a cutter:
With the geometry you’re showing in your first post, I would make all the objects from trimmed or untrimmed planar surfaces - as simple as possible, degree 1 x 1. That will be the simplest geometry to intersect. After that, it will of course depend on the geometry you’re intersecting with.
That was a simplified example of what my cutter actually looks like. In practice, I flare the ends and strive for tangency in the center.
I imagine all the degree 1 planar math is quite simple and bulletproof, but that would cause an error rate during casting. I get rid of any hard edges in the model and if I need them, hand cut them back into the finished part.