RectClip doesn't split concave polygons

[Faydaen796]

RectClip connects all clipped parts into single polygon. It adds edges along rect border to connect different parts even if these edges don't belong to initial polygon or its border at all.

In the image clipping via polygon-polygon intersection would provide three different polygons 1, 2, 3, while RectClip provides single polygon with contour, highlighted by red curve.

RectClip overload for multiple polygons also doesn't split any individual polygon in paths.

[AngusJohnson]

This isn't a bug, but a current limitation of RectClip.
And it's something I'm working on.

[AngusJohnson]

See followup discussion here.