Module tangent 

TangentChain: a tangent chain of edges — edges running on into one another between faces tangent across every vertex of it, as one smooth edge — found from any edge of it (tangent_chain), and the Links it is made of: each edge the way the chain runs along it, with the faces either side.

Structs

Link

One edge of a chain, as the chain runs along it: along the edge’s own direction, forward, or against it; with the faces on its left and right as it runs (seen from outside the solid).

TangentChain

The edges blended as one: a tangent chain (see the module docs), in the order it runs, around to the first again if closed.

Functions

tangent_chain

The tangent chain of edge (see the module docs), running the way the edge does.

vanishes_at

Whether faces could meet tangentially at vertex, their normals there parallel: where the edge between them vanishes, the corner between the faces opening out flat — two equal pipes joined, where they touch. Its chain ends there, and a blend of it narrows to nothing.