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Variable 2nd position keyframe. (first one is locked)
Hi everyone,
I’m creating some mogrts. I’d like one of the available variables to control the x position of the 2nd key frame of an object.
In other words I want it to always start at the same place, but be able control where it goes to horizontally, via a slider control.
I’ve done some searching and nothing I’ve found seems to fit the bill.
Thanks in advance.
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5 Replies
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Try setting the second keyframe to the max position for your comp and then use the slider to offset the value?
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Hi Chris,
I’m getting stuck writing an expression where the slider only controls that second keyframe rather than both.
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Using an interpolation function like linear() will allow you to transition from one value to another over time. E.G.:
let kf1 = transform.position.key(1);
let kf2 = transform.position.key(2);
linear(kf1.time, kf2.time, kf1.value, [sliderVal, kf2.value[1]])You could also use ease(), easeIn() or easeOut() in place of linear, for smoothly eased motion.
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It took me minute to wrap my head around this, i’ve never used the key() before. After testing I was able to get this to work well for me.
p = thisLayer.transform.position[0];
k1 = key(1).value[0];
k2 = key(2).value[0];
v = k2 + effect("Slider Control")("Slider");
[linear(p,k1,k2,k1,v),540]
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Thanks Chris and Stephen. I’ll give these a go, thanks for your help so far.
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