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     RGBrange(3G)                                         RGBrange(3G)



     NAME

          RGBrange - sets the range of color indices used in depth-

          cueing in RGB mode


     SPECIFICATION

          C         RGBrange(rmin, gmin, bmin, rmax, gmax, bmax,

                         zmin, zmax)

                    short rmin, gmin, bmin, rmax, gmax, bmax, zmin,

                         zmax;




          FORTRAN   subroutine RGBran(rmin, gmin, bmin, rmax, gmax,

                         bmax, zmin, zmax)

                    integer*2 rmin, gmin, bmin, rmax, gmax, bmax,

                         zmin, zmax


     DESCRIPTION

          RGBrange sets the range of color indices to use for depth-

          cueing in RGB mode. rmin and rmax are the minimum and

          maximum values stored in the red bitplanes.  Likewise, gmin,

          gmax, bmin, and bmax define the minimum and maximum values

          stored in the green and blue bitplanes respectively.  zmin

          and zmax define the z values that are mapped linearly into

          the RGB range.  z values less than zmin are mapped to rmax,

          gmax, and bmax; values greater than zmax are mapped to rmin,

          gmin, and bmin.


     SEE ALSO

          setdepth, depthcue


          Programming Guide, Section 13.2, Depth-Cueing
























     Page 1                                          (printed 8/20/87)