CurveVector::IsPhysicallyClosedPath tells me if, say, a line-string has coincident start and end points. It looks like a shape, but remains an open curve vector.
I want to measure the area of that not-quite-a-shape. Should I copy the line-string and create a closed CurveVector that I can measure? Is there a CloseShape method I can call or should I extract the line-string points and create a new closed shape?
CurveVector contains some arcane methods: is there another way to get a closed CurveVector from a CurveVector that passes the IsPhysicallyClosedPath test?