/*

 The interface routines for reading and writing PLY polygon files.
 
  Greg Turk, February 1994
  
   ---------------------------------------------------------------
   
	A PLY file contains a single polygonal _object_.
	
	 An object is composed of lists of _elements_.  Typical elements are
	 vertices, faces, edges and materials.
	 
	  Each type of element for a given object has one or more _properties_
	  associated with the element type.  For instance, a vertex element may
	  have as properties the floating-point values x,y,z and the three unsigned
	  chars representing red, green and blue.
	  
	   ---------------------------------------------------------------
	   
		Copyright (c) 1994 The Board of Trustees of The Leland Stanford
		Junior University.  All rights reserved.   
		
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		 documentation for any purpose is hereby granted without fee, provided   
		 that the above copyright notice and this permission notice appear in   
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		  THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,   
		  EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY   
		  WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.   
		  
*/

/*
Copyright (c) 2006, Michael Kazhdan and Matthew Bolitho
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*/