depthcue(3G) depthcue(3G)
NAME
depthcue - turns depth-cue mode on and off
C SPECIFICATION
void depthcue(mode)
Boolean mode;
PARAMETERS
mode expects either TRUE or FALSE.
TRUE turns depthcue mode on.
FALSE turns depthcue mode off.
DESCRIPTION
depthcue 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 lshaderange
or lRGBrange determine the color of the lines, points, characters, or
polygons. The z values, whose range is set by lsetdepth, 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 lshaderange or
lRGBrange.
In color index mode, the color map entries specified by lshaderange
should be loaded with a series of colors that gradually increase or
decrease in intensity.
SEE ALSO
lRGBrange, lsetdepth, lshaderange
BUGS
On Impact depthcue does not work in Color Index mode. It will always
force GOURAUD, shading to be on. On Impact and Infinite Reality depthcue
will not work with a singular MPROJECTION matrix.
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