Polygon and line clipping and offsetting library (development files)

 The Clipper library performs polygon clipping, polygon offsetting and polyline
 offsetting. All four boolean clipping operations are supported - intersection,
 union, difference and exclusive-or. Also, there are no restrictions on the
 types of polygons that can be clipped - they can have holes, be
 self-intersecting, have coincident edges etc.
 .
 These are the files needed for compiling programs with libpolyclipping.