color/

vis_index2rgb.pro

includes main-level program

top vis_index2rgb

direct graphics

result = vis_index2rgb(indices [, /hex])

Converts color indices to RGB coordinates. Color indices are long integers used in decomposed color in direct graphics where the lowest order byte value is the red value, the next byte is the green value, the next byte is the blue value, and the highest order byte value is unused.

Return value

bytarr(3) or bytarr(n, 3); string or strarr(n)

Parameters

indices in required type=long or lonarr(n)

indices representing either a color or n colors

Keywords

hex in optional type=boolean: set to return a string instead of a bytarr(3); string formatted according to HTML/CSS conventions: #RRGGBB

Examples

For example:

  IDL> print, vis_index2rgb('ffff00'x)
     0 255 255

Multiple colors can be converted at once:

  IDL> colors = ['ffff00'x, 'ffffff'x, '0000ff'x, 'ff00ff'x]
  IDL> rgbColors = vis_index2rgb(colors)
  IDL> print, rgbColors
     0 255 255 255
   255 255   0   0
   255 255   0 255
  IDL> tvlct, rgbColors

File attributes

Modification date:	Mon Nov 29 18:33:10 2010
Lines:	63
Docformat:	rst rst

API documentation for visualization library

Michael Galloy