AIPS HELP file for RAINLEVS in 31DEC24

As of Sun Sep 8 19:01:42 2024

INPUTS

LEVS     $                          Contour levels
RGBGAMMA $       0.0                Gamma correction parameter
RGBLEVS  @       0.0        1.0     RGB for each LEVS in order

HELP SECTION

RAINLEVS
Proc:  This procedure will set RGBGAMMA if it is not positive, will
       examine the LEVS values and set them to -10 to -1 followed by 1
       to 10 if they are not set.  Then it will determine a rainbow
       pattern of colors from blue to green to red.  It will set
       RGBLEVS so that the first positive LEVS and first negative LEVS
       will be blue, the 2nd positive and 2nd negative LEVS will be
       somewhat more green and so forth so the highest LEVS (positive
       and or negative) will be red.

       Before using this procedure you must enter
              RUN SETRGBL
       which will define this and 3 other procedures.  Any time you
       change the values in LEVS, you should then enter
              RAINLEVS
       again to select the new set of colors.  Note that these colors
       are similar to those of the verb TVPSEUDO with Button A.

Input/output adverbs:
  RGBGAMMA...If 0 on input, set to 2.2.  The gamma correction
             parameter to adjust colors (value used = input value to
             the 1/RGBGAMMA power).  Larger values make more pastel
             colors.
  LEVS.......Contour level multipliers.  Up to 30 values in increasing
             order - if all 0 on input, set to -10 to -1, 1, to 10.
             Defines which values require colors and what their range
             should be.  Thus, if you change LEVS, you should execute
             RAINLEVS again.
Output adverbs:
  RGBLEVS....RGB colors (3,30) for each of the LEVS in use.
"Scratch" adverbs:
  II, JJ, KK, XX, YY, RR, GG, BB, TT are all changed by the procedure.

EXPLAIN SECTION