.TH GPOLYGON
 6 "IRIT Version 6.0" 
.SH NAME
GPOLYGON



 PolygonType GPOLYGON( GeometryTreeType Object, NumericType Normals )

Approximates all Surface(s)/Trimmed surface(s)/Trivariate(s) in Object
with polygons using the RESOLUTION and FLAT4PLY variables. The larger the
RESOLUTION is, the finer (more polygons) the resulting approximation will be.

FLAT4PLY is a Boolean flag controlling the conversion of an (almost) flat
patch into four (TRUE) or two (FALSE) polygons. Normals are computed to
polygon vertices using surface normals, so Gouraud or Phong shading can be
exploited. It returns a single polygonal object.

If Normals is set, surface normals will be evaluated at the
vertices. Otherwise flat shading and constant normals across polygons are
assumed.

Example:

    Polys = GPOLYGON( list( Srf1, Srf2, Srf3 ), off );

Converts to polygons the three surfaces Srf1, Srf2, and Srf3
with no normals.