
Geometry : 
Subject: Re: [geometry] difference algorithm produces invalid polygon?
From: Barend Gehrels (barend_at_[hidden])
Date: 20120228 13:51:43
Hi Volker,
In addition to this:
On 2822012 19:31, Barend Gehrels wrote:
>>  Why would a polygon of only two distinct points be invalid in the
>> first place? Is this considered "selfintersecting"?
It now throws because the intersection fails and it states that it is
selfintersecting. In a future version we will distinguish between
"selfintersecting", where a real intersection is, and "selftouching",
which has a self tangency or other kind of artefact, but is not really
intersecting. And it should not throw then (if throwing at all).
Regards, Barend
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