Mirco Bianchini

Could be an idea to have also an option to constrain the frame to a particular direction?

@d3ssy So all these functions don't check if the NURBS curve is closed (periodic). So if it is closed has to be clamped first to make the curve usable. 1....

I would keep perpendicolareFrame only for nurbs, there are plenty of method to construct the frame. Same for the line.

I would keep perpendicolareFrame only for nurbs, there are plenty of method to construct the frame. What is the advantage to have a metodo construction a frame along a line?

@mattxwang This could be very handy!!!

@d3ssy and @cesarecaoduro, what do we want to do with this issue?

@cesarecaoduro and @d3ssy can we close this issue, we have `PerpendicularFrameAt` implemented at the level of `NurbsBase` should be enough. Or do we want a specialized version for `Line`?

@d3ssy, can we close this one?

@cesarecaoduro and @d3ssy Do we need this?

After some resources, here are some solutions: - Use the implementation Grasshopper has. - [Alpha concave](https://stackoverflow.com/questions/16625063/alpha-shape-concave-hull-algorithm-in-c-sharp), which is a [generalisation](https://en.wikipedia.org/wiki/Alpha_shape) of the Concave Hull. - [K-nearest](https://www.researchgate.net/publication/220868874_Concave_hull_A_k-nearest_neighbours_approach_for_the_computation_of_the_region_occupied_by_a_set_of_points) - Or from [here](https://github.com/allfii/ConvexHull/tree/master/ConvexHull),...