NURBS Curve PWK regression?

Serengeti (Rhino WIP) Grasshopper2
1

Hello,

I’m porting an existing Rhino 8 project to WIP to learn Grasshopper 2 (and really enjoying it, BTW!). I’ve found what looks like a regression of the GH2 NURBS Curve component as compared to GH1’s Nurbs Curve PWK component.

I want to create a curve with three control points, with the ends tangent to the original lines, and change weighting to control the curvature at the middle, as shown below with the GH1 curve created with the attached definition.

In GH2, changing the weight of the middle point wildly slews the curve back and forth.

Was this change intentional, or a regression?

Thanks!

Scott Arvin

image
image657×487 10.5 KB

Nurbs Curves GH1 vs GH2.ghz (366.9 KB)

System Information.txt (2.1 KB)

3

Certainly looks like GH2 is confused about this. Probably an issue with the premultiplied nature of weighted control points. Fixing Fixed it now.