from the code:

"//Get the colour pallette from an image.
This script is from Jared Tarbell (complexification.net).
takecolor("explosion.gif");"

so i guess any old image will do - it only supplies the colours and is never displayed itself.

andy

sorry for delay.

works for me using a 4x1 gif (the smaller the better) of red, orange and yellow. looks a bit odd in that it has a lot of black in it (which isn't in the gif) but is otherwise ok.

old versions of java didn't support certain graphical file types, maybe that's it.

(ok, explosion.gif is in the jar file included in the html, is here if you want it: http://www.koogy.clara.co.uk/explosion.gif )

http://www.ubuntu.com/ 8)

is it the gif that's the problem? code should work with any other graphic file, like a png. just keep them small because the code to extract the colours gets every pixel in turn (and does a linear search through the already seen colours to see if the new one is a duplicate, yikes.)

failing that, create your own colour array. just change color_picker.pde to fill goodcolor array and numpal with your own values.

in the tab for Transparent_Point, replace the stroke & point lines with:

set(x1, y1, nc);

which is many times faster than point(). apparently the difference is even more considerable on apple's poorly optimized java.

also, put size(600, 600) at the beginning of setup(), and remove the later size(w, h) line. variables *should not be used* with size(), and size() must be the first thing setup.