I honestly think that the 3d rectangle (cuboid) structure in oracle is erroneous. It is defined as (x1,y1,z1,x2,y2,z2), which lets the other two vertices without a Z definition (and this lets the user decide what assign them...), while it would have been consistent if it was (x1,y1,y1,y2,z): this define completely a cuboid (with a fixed Z for all the vertices). So, I would avoid using them but they exist and may create problems for viewers.
What to do? In a 2D canvas I would simply discard the Z, while in a 3D env I would simply use the first one (subjective but argumentative). This is just a workaround to not break the viewer, not a consistent choice... giovanni _______________________________________________ Gvsig_internacional mailing list [email protected] http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional
