s = vrml_faces(x,f,...) - VRML facet object (IndexedFaceSet node)

x : 3xP   : The 3D points
f : 3xQ   : The indexes of the points forming the faces. Indexes
should have values in 1:P.

Returns a Shape -> IndexedFaceSet vrml node.

No check is done on anything

Options :

"col" , col  : 3   : Color,                      default = [0.3,0.4,0.9]
or 3xP : Color of vertices
or 3xQ : Color of facets   (use "colorPerVertex" below to
disambiguate the case P==Q).

"emit", em   : 3   : Emissive color of the surface
: 3XP : (same as color)
: 3xQ :
: 1   : Use color as emissive color too         default = 0

"tran", tran : 1x1 : Transparency,                           default = 0

"creaseAngle", a
:  1  : vrml creaseAngle value. The browser may smoothe the
crease between facets whose angle is less than a.
default = 0
"tex", texfile
: string : Name of file containing texture.   default : none

"imsz", sz   : 2   : Size of texture image
default is determined by imginfo()

"tcoord", tcoord
: 2x3Q : Coordinates of vertices in texture image. Each 2x3
block contains coords of one facet's corners. The
coordinates should be in [0,1], as in a VRML
TextureCoordinate node.
default assumes faces are returned
by extex()

"smooth"           : same as "creaseAngle",pi.
"convex"
"colorPerVertex", c: If 1, col specifies color of vertices. If 0,
col specifies color of facets.         Default = 1

"DEFcoord",n : string : DEF the coord VRML node with name n. Default = ''
"DEFcol",  n : string : DEF the color VRML node with name n. Default = ''

See also: vrml_surf(), vmesh(), test_vrml_faces()