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



 PolylineType GPOLYLINE( GeometryTreeType Object, NumericType Optimal )

Converts all Curves(s), (Trimmed) Surface(s), and Trivariate(s) Object
into polylines using the RESOLUTION variable. The larger the RESOLUTION is,
the finer the resulting approximation will be. It returns a single polyline
object.

If Optimal is false, the points are sampled at equally spaced
interval in the parametric space. If Optimal true, a better, more
expensive computationally, algorithm is used to derive optimal sampling
locations as to minimize the maximal distance between the curve and
piecewise linear approximation (L infinity norm).

Example:

    Polys = GPOLYLINE( list( Srf1, Srf2, Srf3, list( Crv1, Crv2, Crv3 ) ),
                       on );

converts to polylines the three surfaces Srf1, Srf2, and Srf3
and the three curves Crv1, Crv2, and Crv3.