A point where two curves meet: its parameter on each as a fraction of that curve, the index of the
edge it lies on in each as shapes.edge.getEdgesAlongWire numbers them, and whether it is an end
of a stretch where the curves run together rather than a crossing.
A point where two curves meet: its parameter on each as a fraction of that curve, the index of the edge it lies on in each as
shapes.edge.getEdgesAlongWirenumbers them, and whether it is an end of a stretch where the curves run together rather than a crossing.