Curves planarization from double curvature surface

[laurent_delrieu]

I must be dumb, but if you don’t want to modify the edges and angles. What is allowed to be modified ???
If you want to flatten the object you could use the middle point to have flatenable hexagon. Look here :

Matsys: Chrysalis III Angle Sum

It is quite easy to calculate but most of the time there is 2 solutions. So I choose to use curve intersection of RhinoCommon to make the calculations. [image] 360deg_angle_polygon.gh (1.7 MB) /// <summary> /// Return points which have a 360° sum angle with the polygon points /// </summary> /// <param name="polyline">A closed polyline</param> /// <returns>The line</returns> public List<Point3d> GetFlatCenterOfPolyline(Polyline polyline) { //Center of polygon Point3d cent…