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Expression control for only the hue of a fill in a shape layer
Hi All,
Thanks to Mr. Soyka’s really cool hack of the After Effects editable text templates for Premiere, I’ve been able to add fields to change opacity and scaling to my templates.
So, for anyone out there, Mr. Soyka included 🙂
I’ve been trying to figure out how he/you changed the color using a single value and while I was trying to figure it out I was able to see how to extract the hsl values from rgb with the AE expression, but for the life of me I cannot get a suitable expression completed to have the text input control the hue value of the fill of a rectangle.When I pickwhip the color of the fill in the rectangle
it comes back with:content(“Rectangle 1”).content(“Fill 1”).color
but when I try to insert that value into a variable like I’ve seen in so many of the tutorials I’ve gone through like this:
rgb =content(“Rectangle 1”).content(“Fill 1”).color;
hsl = rgbToHsl(rgb)
I get an error saying that the expression result should be dimension 4 not 1 – which I understand, [h,s,l,a], but in all the different tutorials out there, this is how it was done.
Eventually, I’m wanting to use the parseFloat expression to take a numerical value from a hidden text box to change the value of the color of the text box.
Any ideas?
Thanks!
*steve
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13 Replies
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>I get an error saying that the expression result should be dimension 4 not 1
Where are you applying the expression? I just tried it on another color property and it works for me.
Dan
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I’m doing this in the color property of the rectangle’s fill.
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Strange. If I do this:
1. New comp
2. New rectangle shape
3. Add this expression to fill color:rgb =content(“Rectangle 1”).content(“Fill 1”).color;
hsl = rgbToHsl(rgb)I get no error, and the color turns olive green. I’m not sure why it doesn’t work for you.
This also works:
hsl = rgbToHsl(value)
Dan
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Dan,
Yeah, that’s the strange thing. When I created a new project and input the expression again, it all worked fine. I guess I might of had a typo or something that I didn’t see?
Anyway, here is the final expression on the fill color of a shape layer’s rectangle which allows a hidden text box control to change the hue of the fill. The reason for this is that with the text template feature in After Effects, I can create a template which the fill color can be changed in Premiere on the fly.
rgb = content(“Rectangle 1”).content(“Fill 1”).color;
n = parseFloat(thisComp.layer(“[Test]”).text.sourceText);
hsl = rgbToHsl(rgb);
changeHsl = [(n/360) , 1 , hsl[2] , hsl[3]];
hslToRgb(changeHsl);Thanks for the help!
*steve
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Hi-
I am trying your expression but I keep getting an error that the layer “Test” is missing. Is Test the name of your shape layer?..I changed it but nothing changes.
Also, in the text layer, are you using several expression color controls or the fill control? I guess what I;m asking is what are hsl 1,2 and 3? -
[Test] (including the brackets) would be the name of the text layer where he as specified the hue, with a value between 0 and 360.
Dan
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Rick, this is my final script that’s working for me:
{for changing a color based on the hue value (0-360), saturation (0-100) and lightness (0-100) from a hidden text layers
Apply this to the rectangle fill}rgb = content("Rectangle 1").content("Fill 1").color;
hue = parseFloat(thisComp.layer("[Hue]").text.sourceText);
saturation = parseFloat(thisComp.layer("[Saturation]").text.sourceText);
lightness = parseFloat(thisComp.layer("[Lightness]").text.sourceText);
hsl = rgbToHsl(rgb);
changeHsl = [(hue/360) , (saturation/100) , (lightness/100] , hsl[3]];
hslToRgb(changeHsl);
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can you give an example of what you type into the text layer to achieve this?
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the text layer names are [Hue], [Saturation] and [Lightness]
after you set up the expression, change hue from 0-360, saturation from 0-100, and lightness from 0-100 -
Sorry to be bugging you..There is an error on line 6-
Expected: ).
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