set-polygon in region%

Sets the region to the interior of the specified polygon.

See also draw-polygon in dc<%>, since the region content is determined the same way as brush-based filling in a dc<%>.

The result is reliable for both unsmoothed and smoothed drawing. For smoothed drawing, the fill style affects how well the region reliably combines with other regions (via union, xor, and subtract). The region is also atomic for the purposes of region combination.

• (send a-region set-polygon points xoffset yoffset fill-style) -> void
     points : list of point% objects
     xoffset = 0 : real number
     yoffset = 0 : real number
     fill-style = 'odd-even : symbol in '(odd-even winding)