What one edge of a shape is like: the kind of curve it runs along, its length, the point half way
along it and the unit tangent there, following the edge's orientation. A degenerate edge, such as
the pole of a sphere, or an edge with no curve to measure has isDegenerate true, type other,
length 0, no tangent ([0, 0, 0]) and its vertex as midpoint. index is its index as
shapes.edge.getEdges and the selectors number it.
What one edge of a shape is like: the kind of curve it runs along, its length, the point half way along it and the unit tangent there, following the edge's orientation. A degenerate edge, such as the pole of a sphere, or an edge with no curve to measure has
isDegeneratetrue, typeother, length 0, no tangent ([0, 0, 0]) and its vertex as midpoint.indexis its index asshapes.edge.getEdgesand the selectors number it.