Previous: LUT /PEN
The command LUT can read the colormaps from a formatted file. A var-
ious number of these files is already available in the distribution.
Type "LUT ?" to see these files.
The files are searched in the path(s) contained in the SIC logical
LUT#DIR:. It can be a collection of paths customized by the user. By de-
fault LUTs are searched in the current directory and in GAG_LUT: (where
the standard GTV LUTs are stored). The default extension is ".lut".
User can define and save its own LUT in such a file. The formatted file
must be an ASCII file providing the three R, G and B intensities in
three columns, and there must be as many lines as color levels needed.
The intensities are three real numbers between 0.0 and 1.0.
The LUT loaded from such a file will then be resampled (using interpola-
tion) to match the effective number of colors the device supports. For
example, the file example.lut:
shell> cat example.lut
.00000 .00000 .00000
1.0000 .00000 .00000
will produce a black to red color map, with continuous color levels be-