From a novice to script-fu and scheme

I typed the code below into the SFC and its ok as far as it goes ……


> (gimp-image-new 99 99 0)
(3)
> (gimp-layer-new 3 99 99 0 "snow" 100 0)
(10)
> (gimp-image-add-layer 3 10 0)
(#t)
> (gimp-display-new 3)
(2)
> (gimp-context-set-foreground '(0 0 255))
(#t)
> (gimp-edit-bucket-fill 10 0 0 100 0 TRUE 0 0)
(#t)
> (define (vary 0))
vary
> (set! vary (car (gimp-drawable-get-pixel 10 18 18)))
3
> (set! vary (cdr (gimp-drawable-get-pixel 10 18 18)))
(#( 0 0 255 ))


…… but i can’t work out how to set! vary to just one of the three values in (#( 0 0 255 ))

Thanks for looking

The # indicates you have a vector (also known as an array), so you use vector-ref to extract individual elements of the vector:


Kevin

Thanks for the speedy reply and example Kevin, I didn't know the # indicated it was a vector

Steve

Why don't you use Python instead? A lot easier to learn and more powerful. Now a standard part of Gimp.

I’ve heard of Python but must admit I’ve never looked into its capabilities. I sort of drifted into Scheme after finding the SFC and the PB while nosing around in Gimp. Scheme seemed to be the way to get things working. I had no real reason to learn Scheme other than curiosity and of how it related to the SFC, to scripts and Gimp. Then as time went by my interest in these things grew and I just carried on. Not sure I want to drop Scheme and start from scratch with Python but will look into Python and give it some thought.

Steve