Function medial_graph 

pub fn medial_graph(
    model: &Model,
    face: &Shape,
    tolerance: f64,
    tol: Tolerances,
) -> OgeomResult<MedialGraph>

The medial axis of a planar face: every point with two or more nearest boundary elements, as exact branches between branch points.

Holes, reflex corners and circular arcs are handled exactly; an edge on any other curve bisects along a fitted branch held to tolerance. The result’s own check is reported in MedialGraph::deviation.

Errors

OgeomError::Construction if the face is not planar or its boundary cannot be read; OgeomError::NotDone if the branches still fail their check after every refinement of the sampling.