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Mask path and linear expression
Hi all!
I’m trying to do a simple setup so that every time I move a layer, a mask path animates.
I know that the problem (at least for my newbieness) about mask path is that there’s no changeable value like any other properties, so I tried to use index key to set a linear expression.
It doesn’t work because the error says “Path object found where a number array or property is needed”.This is not urgent , I can skip this things by simply animating mask keyframes, but I don’t know how to do that, and that drives me crazy.
If anybody can help me, well… Thank you in advice!
var A = thisComp.layer("layer").transform.position[0];
linear (A,0,100,key(1),key(2))replied 3 weeks ago 4 Members · 4 Replies
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4 Replies
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try it like this:
valueAtTime(linear(A,0,100,key(1).time,key(2).time))Alex Printz
Mograph Designer -
Mmh, no I’m sorry, it doesn’t work.
I thought it was a issue with the inPoint of each layer, so I tried to add a var T= time – (thisComp.layer(“layer”).inPoint + inPoint) but then the expression becomes incorrect… -
Path interpolations can not be done like this. You need to place your keyframes at a fixed time interval (for example one second) and then apply the linear function to the mask path like this:
var A = thisComp.layer(“layer”).transform.position[0];
t = linear(A, 0, 100, 0, 1); valueAtTime(t+thisLayer.inPoint); -
I think this is what you’re after:
a = thisComp.layer("layer").transform.position[0];
t = linear(a,0,100,key(1).time,key(2).time);
valueAtTime(t)
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