Use this procedure to get the RGB triplets associated with a graphics color index.

Syntax

---

ENVI_GET_RGB_TRIPLETS, Index, R, G, B

Arguments

---

Index

This is the graphics color index for the desired triplet. The modulo operator that uses the total number of graphics colors is applied to Index prior accessing the color triplets.

R

This is the red color value.

G

This is the green color value.

B

This is the blue color value.

Example

---

PRO EXAMPLE_ENVI_GET_RGB_TRIPLETS

  compile_opt IDL2  

  ;  

  ; Save the RGB values for 5   

  ; graphics colors into the  

  ; array lookup  

  ;

  lookup = bytarr(3,5)    

  for i=0L,4 do begin    

     envi_get_rgb_triplets, i+2, r, g, b    

     lookup[0,i] = [r,g,b]  

  endfor  

  ;  

  ; Print the resulting array  lookup  

  ;   

  print, lookup

END

API Version

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4.2