Hi All, I need help with 2 hard problems. I store triangles in a table as POLYGON.
1. I want to know for a given triangle, which triangles share an edge (adjacent) with this triangle. 2. Then I have a line that cuts through a triangle's face and a point Q, away from this line and triangle. I would like to know amongst the neighbours of the triangle (calculated in 1), which ones fall *below* the line and closer to the point Q (where Q is the generator of a Voronoi cell). And also the set of triangles that are *above* the line and further from Q. Any suggestions as to how I can go about achieving this in postgis 2.0? Cheers, Ed
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