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Control Scale with Null Position
Is there a way to control a layer’s scale by using the position of a null and/or gradient?
For example, let’s say that you have a grid of boxes. Each box is on it’s own layer. Is it possible to then drag a null from left to right that will scale those boxes up as it moves past them?
Thanks for any help!
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5 Replies
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Hi Brian,
Is there a reason you want to use a null or gradiant?
The way I would scale multiple items is like this-Create a null object and apply the “slider” effect from the
expression controlls effect catagory.Open the scale property of the first item I want to control the scale of (“layer_1” lets call it)
and option click on the stopwatch to reveal the expression controls. Quickwhip
the scale property to the slider effect on the null object.Now select layer_1 and go to edit>copy expression only.
Select the rest of the layers you want linked to the null and paste-
-Andy
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That works for scaling all of the objects at the same time. I’m trying to figure out a way to “grow” the objects on in a linear way.
It would be similar to manually setting the scale for all objects from 0 to 100%, and then offsetting the layers so that they scale up starting on the left and ending on the right. Does that make sense?
The problem is that I am going to be working with a ton of layers and would rather find a more efficient way of working.
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Hi Brian,
Yes that makes sense. You could use a “follow the leader” expression,
which would allow you to set a consistent offset between each scale.Is that what your looking for? Here is a article that does a good job
of breaking down Time offset in expressions.https://www.creativemac.com/2003/12_dec/tutorials/followtheleader.htm
-Andy
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I think that just may work; although I already have it set up in my 3D app for this particular project!!
Thanks for the tip…I’ll review that link for future use.
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Check this out. It uses expressions on a null object (mouse layer) to drive the scale of objects.
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