Need assistance with expression

[Dan Ebberts]

Try this on the Fill effect’s Color parameter:

colors = [
[1,0,0,1], // red
[0,1,0,1], // green
[0,0,1,1], // blue
[1,.5,0,1]]; // orange

seedRandom(index,true);
colors[Math.floor(random(colors.length))]

Dan

[Yair Katznelson]

10x very much!!
can you explain what the numbers represent? / how do i represent specific colors i need with those numbers?

I guess this is not RGB…

[Dan Ebberts]

The numbers are rgba. It’s just that the values go from 0 to 1. So, 50% gray would be [.5,.5,.5,1], white would be [1,1,1,1], etc.

You can set them up this way if it makes you more comfortable:

[255,0,0,255]/255 (red)

Dan

[Yair Katznelson]

10x very much for your help!

[Kevin Camp]

i’m sure yo’re done with this by now, but if you didn’t like figuring out the numerical values for rgba colors, you could add keyframes for the color change (and use the picker to set the colors), the use a slight modification of dan’s expression to randomize the keyframed value that the expression will choose…

this way you wouldn’t need to build the array of rgb values.

seedRandom(index, true);
key(Math.floor(random(numKeys)+1)).value

Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW

[Dan Ebberts]

That’s a good idea. I like it.

Dan