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Random Scale/Rotation/Level values.
Hi there,
I’m pretty new with AE, especially when it comes to expressions. I’m trying to figure out a way to add random scale and rotation values to multiple layers in after effects. I’m working on a music video that involves creating a photo mosaic look.
I’m trying to work out a manageable workflow that will enable me to achieve this desired look. I am thinking about using an action in Photoshop to “cut” my image into sections then animate them in after effects. I basically want each square/layer to animate on with a slightly different scale/rotation/exposure level to sell the homemade collage look.
I’m obviously working with a really large number of layers and I want to be able to do this as easily as possible. I don’t want the values to change over time. I simply want each layer to pop up with slightly different scale,rotation, levels value.
I hope that makes sense. If anyone could point me in the right direction I would be really grateful and if you need anymore information/explanation just ask.
Thanks!
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4 Replies
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I’m not sure what you have in mind for the “animating on” part, but you’ll probably end up with something like this for scale:
minVal = 75;
maxVal = 125;
seedRandom(index,true);
s = random(minVal,maxVal);
[s,s]and this for rotation:
minVal = -15;
maxVal = 15;
seedRandom(index,true);
random(minVal,maxVal)One you have an expression set up for one layer, you can select that property, Edit > Copy Expression Only, select all your other layers, Edit > Paste.
Hope that helps.
Dan
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Thanks for the fast response Dan!
Do you have a suggestion as how I could go about creating a random exposure level for each photo? Would it be a similar expression added to a levels effect?
Thanks so much for your time. You’ve been a really big help.
Rick
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Sure, or you could try the rotation expression on the Brightness and Contrast effect and mess around with minVal and maxVal until you get something you like.
Dan
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Thanks!!
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