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List:       postgis-users
Subject:    [postgis-users] test for asX3D() for PostGIS 1.2.2 SVN
From:       TECHER David <davidtecher () yahoo ! fr>
Date:       2007-05-22 16:45:22
Message-ID: 46531E22.6010103 () yahoo ! fr
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Hi

thanks to the patch from Marc,


 I apply the some idea from his patch for asx3d() done by

David Desbuisson and Olivier Courtin 


from 
http://postgis.refractions.net/pipermail/postgis-users/2007-April/015166.html.

This works too :).


 In lwgeom/lwgeom_x3d.c at line 105, replace

VARATT_SIZEEP(result) = len;

by

SET_VARSIZE(result,len);

For example

testgis=# select asx3d(geomfromewkt('SRID=-1;MULTIPOINT(1.0 -1.0 -1.0, 
1.0 -1.0 1.0,
-1.0 -1.0 1.0, -1.0 -1.0 -1.0, 1.0 1.0 -1.0, 1.0 1.0 1.0, -1.0 1.0 1.0, 
-1.0 1.0 -1.0)'),
 array[[0,1,2,3],[4,7,6,5],[0,4,5,1],[1,5,6,2],[2,6,7,3],[4,0,3,7]]);
                                                                                      \
 asx3d
-------------------------------------------------------------------------------------- \
-------------------------------------------------------------------------------------------------------------
  <IndexedFaceSet 
coordIndex='0,1,2,3,-1,4,7,6,5,-1,0,4,5,1,-1,1,5,6,2,-1,2,6,7,3,-1,4,0,3,7'>
<Coordinate point='1 -1 -1,1 -1 1,-1 -1 1,-1 -1 -1,1 1 -1,1 1 1,-1 1 
1,-1 1 -1'/>
</IndexedFaceSet>

I asks myself about the use of XML native support from Postgresql 8.3. 
It should be very interesting for some useful output!

--david;

	

	
		
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