Subject: [ggl] Considering GEOS
From: Mateusz Loskot (mateusz)
Date: 2009-04-15 16:33:16
Barend Gehrels wrote:
> Hi Mateusz,
>> When I found GGL and started to work with it, I got an idea of
>> porting some of GEOS  algorithms to GGL.
> Actually I had seen that and had to think about it. Personally I
> don't think it is really useful to us. Our approach is totally
> different from theirs.
Yes, I'm aware of that.
> In the past I've looked to some implementations (not GEOS but e.g.
> geometryalgorithms). It is possible but in the end they turn out to
> be completely rewritten. It is justed an "influence" like reading an
I've been thinking of looking at some solutions,
constructions, algorithms and re-implement them completely,
according to GGL approach.
> Besides that I'm afraid that if we "copy" GEOS code we'll also get (a
> part of) its performance.
It is possible.
> Finally there is the license issue.
> It might seem attractive because they have much more (= all OGC)
> operations implemented. However, if we continue the step of the new
> segment intersection, together with the (completely revised) steps in
> the polygon clip (Weiler Atherton graph traversal), we have
> and buffer all implemented so it then becomes really useful.
Absolutely, I can see this potential.
> More about this will follow.
OK, no rush.
-- Mateusz Loskot, http://mateusz.loskot.net Charter Member of OSGeo, http://osgeo.org
Geometry list run by mateusz at loskot.net