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AnyToPL(3gv)							  AnyToPL(3gv)

       AnyToPL - convert an arbitrary geom to a	polylist (OFF file format)

       #include	"geomutil.h"

       Geom *AnyToPL(Geom *, Transform);

       AnyToPL()  takes	 any geom as an	arguement.  It then returns a polylist
       object which is geometrically identical	to  the	 original  geom.   The
       transform  argument  is	the transform applied to the entire object; it
       should generally	be set to TM_IDENTITY when AnyToPL() is	first  called.
       Geometric objects are handled in	the following ways:

       Polylists:  A transformed copy of the original is returned.

       Bezier:	The object is rediced if necessary, then handled as a mesh ob-

       Quad:  The object is directly transformed into a	new polylist.

       Mesh:  The object is directly transformed into a	new polylist, with ex-
       tra polygons added to do	the wrapping if	necessary.

       Vect:   The  object is converted	into a polylist	containing a 2-gon for
       every segment in	the original vector object.  The colors	of  the	 faces
       are  the	 same as the colors of the original object, but	this generally
       is irrelevant since the faces are not visible.  Note that edge visibil-
       ity  must be enabled for	an object which	has been converted from	a vect
       to a polylist to	be visible in geomview.

       List:  AnyToPL()	is called recursively and the resultant	polylists  are
       combined	 using	PLCombine(3).	Inst:  AnyToPL() is called recursively
       with a new transformation matrix.  The resultant	polylists are combined
       using PLCombine(3).

       No  effort is made to eliminate identical vertices.  However, no	extra-
       neous repeated vertexes should  be  created.   The  resultant  polylist
       should have the same number of vertexes as the original object.

       AnyToPL() is part of the	geomutil library; see geomutil(3) for informa-
       tion on how to link your	program	with this library.

       plcombine(3), anytooff(1), geomview(1), geomutil(3)

       Celeste Fowler
       The Geometry Center

Geometry Center			 June 15, 1992			  AnyToPL(3gv)


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