I have a little problem in Grasshopper. Let’s say I have a sphere surface or a spline curve drawn in the viewport. I then pipe these objects in EvaluateSurface or EvaluateCurve to get a point and normal at a given parameter location t or uv. In both cases, I do get points on the curve and the surface, but the normal don’t point consistently in the same direction. For the surface, for example, some point inwards, some outwards. For the curve, there is an analogous problem. What do I need to do to make sure I get consistent normal across a surface / curve?
Thanks a lot for any help…