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After Effects Grid maker

March 24, 2018

I was messing about with expressions in After Effects a while ago and this week I saw two people online talking about something similar to this, so I thought I'd post the expressions here...

 

Basically, you start with one layer in a comp, then add these expressions to position and to scale. Then when you duplicate that layer, say 9 times, you get a grid of 3 x 3 to fit your comp size. Then you'd just replace the footage in each layer as needed.

 

Position expression;

  

NumberAcross = Math.ceil(Math.sqrt(thisComp.numLayers));

 

W =  thisComp.width/NumberAcross;

H =  thisComp.height/NumberAcross;

 

gridPos = index ;

col =  gridPos      % (NumberAcross+0.0001)      ;

row = Math.ceil(1/(NumberAcross/gridPos));

 

xPos = (thisComp.width/NumberAcross)*(col-1);

yPos = (thisComp.height/NumberAcross)*(row-1);

 

[(xPos+W/2) ,(yPos+H/2)]

 

Scale expression;

  

NumberAcross = Math.ceil(Math.sqrt(thisComp.numLayers));

 

xSize = (thisComp.width/width)*100/NumberAcross;

ySize = (thisComp.height/height)*100/NumberAcross;

 

[xSize,ySize]

 

Then duplicate the item 4 times, 9 times, keep on duplicating

 

Let me know if it works! Seems to...

 

 

 

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