Changes

The pool consists of sectors, which are in fact triangles, each with there vertex their vertices position. For each sector there are 3 vertexs vertices (3 vertex_3s). Res and z values are often the same, for z this is expected (think planes of data), more study is needed as to what res might be being used for. The polygons are 'wound' clockwise, this makes determining if a point is within a triangle easier.