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Control position based on a slider's valueAtTime, but with a custom easing
I’d like to control a layer’s position relative to its starting position, using an animated slider’s valueAtTime(). I want to do a sort of custom easing on the position change. Here’s an arbitrary example:
When the slider is at 100, the position should be 0. When the slider is at 0, the position should be 100. But when the slider is at 40, the position is 75. Is this possible using combinations of ease() or linear(), or something else entirely?
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6 Replies
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the ease you can do, and thats something else, but what do you want to do for the math ?
for example what if the slider is at 22, what do you want to the position to be ? there has to be some type of math, I am not sure how 40 and 75 relate to each other if 100 is 0 and 0 is 100
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Hey Joel, you should look exponential easing function, where “ratio of easing” could be adjusted
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Hi Tomas, I’m not familiar with this; can you elaborate?
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Hi Adam – well 40 and 75 don’t really relate to each other, that’s the point. I gave an arbitrary example, but I ran into a situation the other day where I was trying to rig up some automated movement so I didn’t have to keep animating something meticulously.
I had the object position keyframed, and was controlling the movement between the keyframes with eg. “valueAtTime(slider)”. I had an animated slider controlling various things, and I wanted an object to move a specific amount when the slider was at 75. Then when the slider animated the rest of the way, the object needed to move the rest of its distance.
Edit: Well, I guess some conditional statements seem to work ok.
s = thisComp.layer("Slider Control").effect("Slider Control")("Slider");
if (s <= 75) {
x = linear(s, 0, 75, 0, 40);
}
else {
x = linear(s, 75, 100, 40, 100);
}
y = value[1];
[x, y] -
Oh I see. There is a post in this forum that will allow to have more control over the animation curve if that is what you were looking for. Let me see if I can find it. In fact I remember saving a project that had 3 ways of doing this, and you pick the one that works best. I’ll check now and post back when I find it.
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We can thank Dan and Kevin for these methods.
( if they help you )
https://creativecow.net/forums/thread/better-than-ease/
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