ply format ascii 1.0 comment Three.js r185 Float64 normalization fixture element vertex 3 property double x property double y property double z property uchar red property uchar green property uchar blue element face 1 property list uchar int vertex_indices end_header 0.0 0.0 0.0 255 0 0 100.0 0.0 0.0 0 255 0 0.0 100.0 0.0 0 0 255 3 0 1 2