ENVI_GET_RGB_TRIPLETS

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

4.2