Expression for color control

[Jarek Borzecki]

thanks Dan, I’ll check again everything…

[Jarek Borzecki]

it’s working fine now! my fault, dont ask what happened please

thank you again for your help!
J

[Goran Milovanovic]

This is amazing script. Is it possible that instead of random color I use float values in range from example -25,453 to 25.453. -value is blue and +value would be red like gradient. I have around 700 float values that i want to change into colors per frame.

I am new to scripting so I would appreciate any help
Thanks in advance

[Rob Mcdougall]

Hello all,

I’m wanting to control a colour scheme using a slider.

So, if slider = 1

circle = red

square = green

triangle = blue

when the slider value increased to 2 each fill layer would move on to the next object…

circle = blue

square = red

triangle = green

So, I understand that I need to make a range of colour controls, then I want to store them in a list. What I don’t understand is how to chose a specific colour (or member of the index) based on the slider value. Any suggestions?

[Dan Ebberts]

Assuming your colors are stored in an array named “colors”, and your slider control value is ‘slider’, you could calculate an index for each layer like this:

idx = ((index-1) + Math.floor(slider))%colors.length;
colors[idx]

You might have to modify the index-1 if your shape layers aren’t at the top of the layer stack.

Dan

[Brandt Weisman]

This works great. Is there anyway to control the duration of the color cycle. Every frame is a bit fast for my needs. Thanks.

[Matthew Newcomb]

Hi, Not sure if you ever got an answer to your question, but if you did would you mind sharing it with me? I’m not very good at expressions yet!

[Deepak Kumar]

How to use this Scripts. Can you tell me what i have to do.

[Will Mcmillian]

To make this last longer than a single frame, this worked for me; pre-comp and enable time-remapping to your new layer. Then apply this expression to the time re-mapping:

framesToTime(Math.floor(timeToFrames()/4));


[Greta Senne]

Hey,
im using your code just added a little time-tweak. I have this Code on an Adjustment Layer because i have multiple layers that i want to change between the colors – but randomly in time. right know everything is changing together.. i hope you understand what i mean.

i think it could work about the “index”?!

— thank you —

here the code again (just added this holdTime-lines)

l=thisComp.layer("Colors");

// retrieve colors stored in the color controls
i=1;
colors=[];

try {
while(l.effect(i)) {
// an effect exists, but is it a color control ?
// We'll check if it's first parameter is called "Farbe"
if (l.effect(i)(1).name=="Farbe") {
colors.push(l.effect(i)(1).value); // store the color in a list
}
i++;
}
} catch (e) {}

// Now if the list of colors contains any elements
// we will get a random value from the list.

if (colors.length) {
holdTime = .5;
seed = Math.floor(time/holdTime);
seedRandom(seed,true);

r=Math.floor(random(colors.length)); // a random integer
colors[r]; // return the color

} else {
// the list of colors is empty, so we use the existing color value.
value;
}