       SippPolygonPush [-flags] vertexList
              Create  a  polygon from a list of vertices and push
              it onto the polygon stack.  The following flags may
              be specified:

                 o -norm - User normal vectors are supplied.

                 o  -nonorm  -  User  normal vectors are not sup-
                 plied. This is the default.

                 o -tex - Texture coordinates are supplied.   The
                 behavior  of  texture coordinates depends on the
                 shader.

                 o -notex - Texture coordinates are not supplied.
                 This is the default.

                 o -clock - Vertices are in the list in clockwise
                 order when looking at  the  front  face  of  the
                 polygon.

                 o  -counter  - Vertices are in the list in coun-
                 terclockwise order when  looking  at  the  front
                 face of the polygon.  This is the default.

              The  vertices must be pushed on the vertex stack in
              either counterclockwise (the default) or  clockwise
              order when looking at the "front" face of the poly-
              gon.  Otherwise the front of the  surface  will  be
              defined in the wrong direction.

              If  neither  -tex  or -norm are specified, then the
              list contains just vertices, each element being  in
              the form "x y z".

              If  -norm is specified, then the list contains both
              vertices and normal vectors, each element being  in
              the form "{x y z} {nx ny nx}".

              If  -tex  is specified, then the list contains both
              vertices  and  texture  coordinates,  each  element
              being in the form "{x y z} {u v w}".

              If both -tex and -norm are specified, then the list
              contains both vertices, normal vectors and  texture
              coordinates,   each   element  being  in  the  form
              "{x y z} {nx ny nz} {u v w}".

              If a vertex in the polygon is already defined in  a
              previous  polygon that belongs to the same surface,
              the same vertex will be referenced,  i.e.  vertices
              shared  between  polygons are only stored once, but
              they must be repeated when defining the polygons.
