RGBcolor(3G) RGBcolor(3G)
NAME
RGBcolor - sets the current color in RGB mode
C SPECIFICATION
void RGBcolor(red, green, blue)
short red, green, blue;
PARAMETERS
red expects the value indicating the intensity of the red component.
green expects the value indicating the intensity of the green
component.
blue expects the value indicating the intensity of the blue component.
DESCRIPTION
RGBcolor sets the red, green, and blue color components of the currently
active GL framebuffer, one of normal, popup, overlay, or underlay as
specified by drawmode, to the specified values. Alpha, when supported,
is set to the maximum value. The current framebuffer must be in RGB mode
for the RGBcolor command to be applicable. Most drawing commands copy
the current RGBA color components into the color bitplanes of the current
framebuffer. Color components are retained in each draw mode, so when a
draw mode is re-entered, red, green, blue, and alpha are reset to the
last values specified in that draw mode.
Color component values range from 0, specifying no intensity, through
255, specifying maximum intensity. Values that exceed 255 are clamped to
it. Values less than 0 are not clamped, and therefore result in
unpredictable operation.
It is an error to call RGBcolor while the current framebuffer is in color
map mode.
The color components of all framebuffers in RGB mode are set to zero when
gconfig is called.
SEE ALSO
c, cpack, drawmode, gRGBcolor, lmcolor, RGBmode
NOTE
RGBcolor can also be used to modify the current material while lighting
is active (see lmcolor).
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