Changes

The pool of pool consists of sectors, which are in fact triangles , each with there vertex position. For each sector you have there are 3 vertexs (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, likely it is used for this makes determining if a point is in said within a triangleeasier.