Matlab读取ply文件，polydata

PLY_IO 
Read or Write a PLY File

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PLY_IO is a MATLAB library which reads or writes data describing a polygonal mesh in a PLY file.

A PLY file contains a sophisticated data structure describing a polygonal surface. A triangulated mesh is a very simply case of such a surface; a PLY file can also describe a mesh surface involving higher order polygons, and it can contain auxilliary information about normal vectors and so on.

A TRI_MESH or triangulated mesh surface, is described by a pair of arrays:

• a node coordinate array containing the coordinates of nodes;
• a triangle