The shell or solid whose corners are looked up.
OptionalpointsPoints near the corners to classify; the vertex nearest each point is the one reported.
OptionalsnapHow far a point may be from a vertex and still pick it, in model units; 0 or less accepts the nearest vertex whatever the distance.
A shell or solid and points near its corners for
corners.classifyCornerByPoint, which reports what kind of corner each point picks.