Barend Gehrels wrote:
Where says the documentation actually that difference is implemented? I think it states that it is supported by the algorithm, but not implemented as a separate function... Like I said above.
It's the first line at:
http://geometrylibrary.geodan.nl/formal_review/sets.html
Introduction The GGL implementation of the algorithms intersection, union, difference and symmetric difference is based on set theory (a.o. http://en.wikipedia.org/wiki/Set_(mathematics)). OK, sorry about that. It is true. I wrote that page one week ago, during
Brandon Kohn wrote: the review, as additional doc, and it gives the necessary theoretical background. It *is or will be* (depending how you consider it) implemented like that but *not yet* as a separate function. It is written in the lower part of that page but not in the first line. Sorry about the confusion, and (I now understand better) also about my remark about invalid input, I understand the confusions now, you are right to test like that. Barend