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Link rotation to two different slider controls
I’m pretty new to expressions, but it has surely opened a bunch of doors!
I’m rigging a face for animation. I’ve got two groups under one shape layer named “Eyebrows”: “Eyebrow L” and “Eyebrow R”.
I’ve linked each eyebrow’s position and rotation to two different slider controls so that the eyebrows will move symmetrically when I use the sliders.
Now, I want to be able to make a slider that controls a contra-rotation as well, where “Eyebrow L” goes from -25° to 45° and “Eyebrow R” goes from -30° to 40°, but at the same time be able to use the rotation-slider.
In other words; the conta-rotation will have to be relative to the symmetrical rotaton of the two shape layer groups.
Is it possible to make an expression on that, or do I need to put each eyebrow in seperate layers?
Thanks 🙂
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1 Reply
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I know you posted this like 8 years ago, I hope that by now you have found the solution but in case not, I figured it out. The secret to combining two sliders [or other expression controls] to one property is: Conditional Statement
The secret formula is the if/else statement and a checkbox control with two keyframes (on then off).
So, you need to have your sliders equal to a value. the value can be written as anything, a letter a word, a number. I wouldn’t use numbers because it might look confusing.v = (pick whip to the first slider);
z = (pick whip to the second slider);if (thisComp.layer(“LayerName”).effect(“CheckBoxName”)(“Checkbox”).value>0) {v}
else {z}v = thisComp.layer("LayerName").effect("1stExpressionControlName")("Point");
z = thisComp.layer("LayerName").effect("2ndExpressionControlName")("Point");if (thisComp.layer("LayerName").effect("CheckBoxName")("Checkbox").value>0) {v}
else {z}
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