hue change - AVS Forums

macaroon

19th August 2003 10:50 UTC

hue change
It is possible to change the hue of what's on the avs (on a beat) through either random colours or a random colour from a previously set of pre-defined colours? ie on a beat everything goes red, next beat goes green etc..

Cheers

Magic.X

19th August 2003 11:23 UTC

UnConeD made an APE (additional Plugin) that will do fine. It's called ColorMap. Get it here.

Deamon

19th August 2003 11:49 UTC

Yep, that'll do the trick. Unless it's scopes you want to color, you can change color of scopes onbeat (or any trigger you want) as well. add rgb values to per point data.


x=i*2-1;
y=v/2;

r=1;
g=0;
b=0;

will result into a red colored scope. Values go from 0 to 1. You can of course always use all of avs coding terms, like sin, cos, abs and whatnot.

shreyas_potnis

19th August 2003 12:49 UTC

To change the hue of a color in a ssc, use this:

tpi=2*acos(-1) //twice pi 6.28...
hue=0..6.28;

red=sin(hue+tpi*.33)*.5+.5;
green=sin(hue+tpi*.66)*.5+.5;
blue=sin(hue+tpi*.99)*.5+.5;

dirkdeftly

20th August 2003 01:30 UTC

that's not really a hue setting, but it works okay....
and shreyas, that should be
red=abs(sin(hue));
green=abs(sin(hue+pi/3));
blue=abs(sin(hue-pi/3));
works correctly (as far as i can tell yours doesn't but i haven't tried it yet) and with less operators...

an actual hue shifter that was remotely customizeable would be hard because making a code parser even as simple as avs's in an ape is (afaik) pretty hard to do. unfortunately for us ape's don't come with internal avs language support. but i do think a simple hueshifter that shifted at a constant rate would be pretty easy....

shreyas_potnis

20th August 2003 06:50 UTC

Its all there in the Tips and Tricks thread, and btw mine works fine.

dirkdeftly

20th August 2003 07:51 UTC

it may work fine but it's --ing stupid. what the hell is *.99 about anyway? :P

Zevensoft

20th August 2003 08:27 UTC

You could set up a basic assembler-like language for use in a APE with no more than about 20KB worth of code. The problem is whether people would figure it out. Hell, Commodore made an entire BASIC interpreter in 8KB, and on a CPU without any floating point or division/multiplication instructions.