Change the Color of Multiple Layers With Change to Color Effect

[John Cuevas]

I think you need to add another channel there for the alpha, that’s why you are missing a dimension.

Johnny Cuevas, Editor
Thinkck.com

“I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
—THOMAS EDISON on inventing the light bulb.

[Dorian Heller]

Okay, thanks! How exactly would I do that?

Thanks,
Dorian

[Cassius Marques]

you’re assigning to the variable “color” a 1 dimension value… and you’re passing that out to “rgbToHsl”

It should be something like

convert = rgbToHsl([color,0,0,0]) – [0, 0, 0, change];

or

convert = rgbToHsl([something,something,something,color]) – [0, 0, 0, change];

I’m not sure what should go what to give the desired effect…

but that’s your error there.

[Dorian Heller]

Thanks for the idea, unfortunately I’m still getting an error.

Here it is:

After Effects warning: Bad method arguments: rgbToHsl() needs exactly 1 argument
Expression disabled.

Thanks,
Dorian

[Cassius Marques]

It is one argument…are you sure you wrote it right?

You have to keep the “(” “)”

Worked here…

[Dorian Heller]

Cassius,

You were right, I did forget the quote marks. But now, I am getting a divide by zero error, (arg)! I have changed the values from 0 to 1 and random numeric values but still to no avail:

color = effect(“Change Color (Global)”)(“Hue Transform”);
change = 1;
convert = rgbToHsl(“1,.3,.6,color”) – [1,.2,.4, change];
hslToRgb(convert);

Thanks for all your help!
Dorian

[Cassius Marques]

I’m sorry if this is confusing…It’s kind of hard to give you the correct simple answer when i’m unsure what you’re going for…

but you got me wrong… I didn’t mean the quote marks…I meant you have to leave your 4 dimensions [1,2,3,4] inside the parentesis…so it is only one argument…

I copy and pasted what I wrote you before…and it returned no errors.

Good luck.

[Dorian Heller]

Hmmm… That is weird I am trying to get the shape layers Hue to be controlled by one central Hue control, based on expressions. I have the following expression:

color = effect(“Change Color (Global)”)(“Hue Transform”);
change = 1;
convert = rgbToHsl(“1,2,3,4color”) – [.2, 2, 2, change];
hslToRgb(convert);

This one is with quotes, and I get the following error:

After Effects warning: invalid numeric result (divide by zero?)
Expression disabled.

Then without quotes and just “color”:

color = effect(“Change Color (Global)”)(“Hue Transform”)
change = .2;
convert = rgbToHsl(color) – [0, 0, change];
hslToRgb(convert);

error:

After Effects warning: Bad method arguments: argument 1 to rgbToHsl() must be of dimension 4
Expression disabled.

Then with just numbers:

color = effect(“Change Color (Global)”)(“Hue Transform”)
change = .2;
convert = rgbToHsl(1,2,3,4) – [0, 0, change];
hslToRgb(convert);

After Effects warning: Bad method arguments: rgbToHsl() needs exactly 1 argument
Expression disabled.

So I do think it needs quotes. But I can’t seem to figure it out..

Here is the .aep, maybe you could look at it and tell me what I am doing wrong:

https://dl.dropbox.com/u/17788937/Test%201%20copy.aep

Once again, thanks for all your help, I really appreciate it.

Cheers,
Dorian