08-10-2020, 06:37 PM
If you will be ok with a horizontal line, then you may use the slicing functionality to slice the 3D model with a horizontal plane. Then you can create a 2D line at the edge of the sliced 3D model. See the SliceSample in the "Advanced 3D objects" sample in the Ab3d.PowerToys samples.
Andrej Benedik

