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Impressive indeed<br>
For example, try (under windows) the demo of alpha shape (which we can
use to find concave hull of a set of points :<br>
<a class="moz-txt-link-freetext" href="http://www.cgal.org/demo/alpha_shapes_2.zip">http://www.cgal.org/demo/alpha_shapes_2.zip</a>) <br>
<br>
I had the idea looking the pyrol tools plugin under OpenJump which
provide delaunay triangulation, iso lines, terrain modeling, etc.<br>
(see : <a class="moz-txt-link-freetext" href="http://openjump.org/wiki/show/Plugins">http://openjump.org/wiki/show/Plugins</a>)<br>
<br>
I think native function under qgis will be a big step (for those who do
not want to create grass vector layers from existing ones)<br>
In the same direction, I "almost" finished a simple convex hull plugin
for qgis (using the python bindings).<br>
<br>
I also posted before to ask the list about intersection functionnality
under qgis, and I think it is "simple" to develop a layer intersection
plugin too. My pbm : too many ideas and few time :-)<br>
<br>
For the CGAL implementation under qgis, I think it is above my skill
now (I tried to use the python binding in a console, import
successfully the dll, but could not see how to use the functions :-(<br>
<br>
Regards<br>
Kimaidou<br>
<br>
Tim Sutton a écrit :
<blockquote
cite="mid:d368056f0801300624s7a76fdf0id3f9d4242f37d15c@mail.gmail.com"
type="cite">
<pre wrap="">Hi
Wow! That lib looks really impressive. Once QGIS 1.0 is out the way we
can start to look more seriously at creating these types of functions
in the core of QGIS.
Regards
Tim
2008/1/30, Michaël Douchin <a class="moz-txt-link-rfc2396E" href="mailto:michael.douchin@laposte.net"><michael.douchin@laposte.net></a>:
</pre>
<blockquote type="cite">
<pre wrap="">Hi all,
After a deep research, I found the projetct CGAL, wich provides
geometrical algorithm : voronoi diagram, convex hull, triangulation, etc.
<a class="moz-txt-link-freetext" href="http://www.cgal.org/">http://www.cgal.org/</a>
They provide python bindings too ( <a class="moz-txt-link-freetext" href="http://cgal-python.gforge.inria.fr/">http://cgal-python.gforge.inria.fr/</a> )
Do you think this could be used in qgis ? Or do you think the grass
tools a sufficent ?
Kimaidou
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