AnyToPL(3) Geometry Center (June 15, 1992) AnyToPL(3)
NAME
AnyToPL - convert an arbitrary geom to a polylist (OFF file
format)
SYNOPSIS
#include "geomutil.h"
Geom *AnyToPL(Geom *, Transform);
DESCRIPTION
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 object.
Quad: The object is directly transformed into a new
polylist.
Mesh: The object is directly transformed into a new
polylist, with extra 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 visibility 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 extraneous repeated vertexes should be created. The
resultant polylist should have the same number of vertexes
as the original object.
LINKING
AnyToPL() is part of the geomutil library; see geomutil(3)
for information on how to link your program with this
library.
Page 1 (printed 12/22/98)
AnyToPL(3) Geometry Center (June 15, 1992) AnyToPL(3)
SEE ALSO
plcombine(3), anytooff(1), geomview(1), geomutil(3)
AUTHOR
Celeste Fowler email: fowler@geom.umn.edu
The Geometry Center phone: (612) 626-8304
1300 South Second Street
Minneapolis, MN 55454
Page 2 (printed 12/22/98)
