Making a profile on specific mesh edges

[DanielPiker]

Are you after the edge normals? (as bisectors of the adjacent face normals)
Here’s a little script I made a while back to demonstrate this.

mesh_adjacentFaces.gh (31.9 KB)

See also this older thread:

Mesh Curvature confusion

Thanks Rolf, this does show it more clearly than what I’d written! One thing I found when writing this component (and you might need to watch out for if scripting something similar) was that if you want to distinguish between a ‘mountain’ and a ‘valley’ fold on the surface, you need to know which of the 2 faces sharing an edge is on the left, and which is on the right (when looking along the direction of the edge, and with ‘up’ being outside the surface). Without this you can get the angle betw…