setnur(3G)setnur(3G)NAMEsetnur - sets a property for the display of trimmed NURBS surfaces
FORTRAN 77 SPECIFICATION
subroutine setnur
integer*4 property
real value
PARAMETERS
property expects the name of the property to be set.
value expects the value to which the named property will be set.
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 edges of
polygons on the screen used to render trimmed NURBS surfaces.
The default value is 50.0 pixels. NDISPL: 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.
NCULLI: 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, getnur, nurbsc, nurbss, pwlcur
NOTE
Nurbs properties are on a per window basis.
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