This directory contains four 3d models that can be used to test metro. The models represent the same toroidal knot at two different level of details. - knot_orig.ply 12800 vertexes, 25600 triangles: the original high resolution mesh - knot_subsampled.ply 800 vertexes, 1600 triangles: a low res model obtained by simple uniform subsampling - knot_vcg_simplified.ply 800 vertexes, 1600 triangles: a low res model obtained by our library simplification code - knot_max_simplified.stl 800 vertexes, 1600 triangles: a low res model obtained by using a commercial tool