congratulations，
firstly ,thanks for your demo to show a lot of details
I also have the same question in my project ,this also need to to use the 3d path to sweep.
I 'm searching for the solution method until I meet this page.
If you can reply my letter ，I will be reaily happy
there is my question .
I want to set the SketchPlane .
but I noticed you use the method which "named ComputeSketchPlane"
to calculate the pathLine .
what reletionship beteen the pathline and the sketchPlane?
what should I notice?
waiting for your reply. thanks for your kindness