gpr_inq_triangle_fill_criteria() — Apollo Domain/OS SR10.3.5

GPR_$INQ_TRIANGLE_FILL_CRITERIA   GPR Calls    GPR_$INQ_TRIANGLE_FILL_CRITERIA


NAME
     gpr_$inq_triangle_fill_criteria - returns the filling criteria used with
     polygons decomposed into triangles.

FORMAT
     gpr_$inq_triangle_fill_criteria (fill_crit, status)

DESCRIPTION
     This routine returns the filling criteria used with polygons decomposed
     into triangles.  Use gpr_$pgon_decomp_technique to set a mode which con-
     trols the algorithm used to decompose polygons.  Use
     gpr_$set_triangle_fill_criteria to set the filling criteria used with
     polygons decomposed into triangles or for polygons rendered with the
     render exact algorithm.  For details on decomposition techniques, see the
     Programming with Domain Graphics Primitives manual.

   Output Parameters
     fill_crit
          Returns the filling criteria. This is a 2-byte integer.

          Possible values for this parameter are:

          gpr_$parity
               provides a means for filling polygons decomposed into triangles
               using an odd parity scheme. Regions filled in these polygons
               will match regions filled in polygons decomposed into tra-
               pezoids.

          gpr_$nonzero
               provides a means for filling all nonzero regions of a polygon.

          gpr_$specific
               provides a means for filling specific regions of a polygon.
               This is done by specifying a winding number.  The only restric-
               tion is that regions with a winding number of zero cannot be
               filled.

     status
          Completion status, in status_$t format.
Museum
