depthc(3G)

NAME
     depthc - turns depth-cue mode on and off

FORTRAN 77 SPECIFICATION
     subroutine depthc(mode)
     logical mode

PARAMETERS
     mode   expects either .TRUE. or .FALSE..

             .TRUE. turns depthcue mode on.

             .FALSE. turns depthcue mode off.

DESCRIPTION
     depthc turns depth-cue mode on or off. If depth-cue mode is on, all
     lines, points, characters, and polygons are drawn depth-cued. This means
     only the z values and the range of color values specified by lshade or
     lRGBra determine the color of the lines, points, characters, or polygons.
     The z values, whose range is set by lsetde, are mapped linearly into the
     range of color values.  In this mode, lines that vary greatly in z value
     span the range of colors specified by lshade or lRGBra.

     In color index mode, the color map entries specified by lshader should be
     loaded with a series of colors that gradually increase or decrease in
     intensity.

SEE ALSO
     lRGBra, lsetde, lshade

BUGS
     On Impact depthc does not work in Color Index mode. It will always force
     GOURAU, shading to be on.  On Impact and Infinite Reality depthc will not
     work with a singular MPROJE matrix.