Fill every area, where, when travelling along a line, the
summed winding number (that is, -1 for a
counter-clockwise-oriented polygon, and +1 for a
clockwise-oriented) is non-zero.
Fill every area, where, when travelling along a line, the
summed winding number (that is, -1 for a
counter-clockwise-oriented polygon, and +1 for a
clockwise-oriented) is non-zero.
For example, a poly-polygon consisting of two concentric
circles with similar orientation is filled the same way as if
only the outer circle would exist. If both have opposite
orientation, then the filled representation looks the same as
if filled with the EVEN_ODD fill rule.
