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      Interpolate between two color table entries.


Calling Sequence

      ctint, r, g, b, i1, i2, [mode]


      i1, i2 = start and end index for interpolation. in
      mode = interpolation mode (def=1). in
        Color interpolation mode
      0 = Copy. Copy color i1 to i1:i2 range.
      1 = R,G,B. Interp each color independently.
      2 = H,S,V straight. Through less sat. hues (grays).
      3 = H,S,V curved. Through sat. in-between hues.
      4 = Reverse. Reverse colors in i1:i2 range.
      5 = Ramp value from i1 down to 0 at i2.

Keyword Parameters


      r,g,b = color table, red, green, blue. in out

Common Blocks


      Note: Modifies the color table.

Modification History

      R. Sterner, 6 Sep, 1990
      R. Sterner, 18 Oct, 1993 --- Added Copy and Reverse.
      R. Sterner, 21 Oct, 1993 --- Added Ramp mode.
      R. Sterner, 2010 May 04 --- Converted arrays from () to [].
  Copyright (C) 1990, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.

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