getnur(3G)getnur(3G)NAMEgetnur - returns the current value of a trimmed NURBS surfaces display
property
FORTRAN 77 SPECIFICATION
subroutine getnur
integer*4 property
real value
PARAMETERS
property expects the name of the property to be queried.
value expects variable into which the system should write the value
of the named property.
DESCRIPTION
The display of NURBS surfaces can be controlled in different ways. The
following is a list of the display properties that can be affected.
NERRO: If value is 1.0, some error checking is enabled. If error
checking is disabled, the system runs slightly faster. The
default value is 0.0.
NPIXEL: The value is the maximum length, in pixels, of egdes of
polygons on the screen used to render trimmed NURBS surfaces.
The default value is 50.0 pixels.
An enumeration that dictates the surface rendering
format; it affects surfaces only. Possible values are NFILL,
NOUTPO, and NOUTPA. NFILL instructs the GL to fill all
polygons generated in the tessellation of the surface. NOUTPO
instructs the GL to outline all polygons generated. NOUTPA
instructs the GL to outline the boundary of all surface patches
and trim curves.
A Boolean value that, when TRUE, instructs the GL
to discard before tessellation, all patches that are outside
the current viewport.
SEE ALSO
bgnsur, bgntri, nurbsc, nurbss, pwlcur, setnur
NOTE
This routine is available only in immediate mode. Nurbs properties are
on a per window basis.
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