There seem to be some issues with PolyRegion2d caused by LibTess (see speps/LibTessDotNet#12).
This PR addresses these issues as explained in the LibTess issue above.
Some tests were added which reproduced the problems but work now (with the exception of one).
There seem to be some issues with PolyRegion2d caused by LibTess (see speps/LibTessDotNet#12).
This PR addresses these issues as explained in the LibTess issue above. Some tests were added which reproduced the problems but work now (with the exception of one).