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Snap Zoom In and Out

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After Effects CS3
Text-FX
Expressions

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//applyTo: scale
//Snap zoom in and out
snapScale = 300; //percent of scale to zoom

trans = 4; //  transition time in frames
trans = trans * thisComp.frameDuration;
inTrans  = easeOut(time, inPoint, inPoint + trans, [snapScale,snapScale], [0,0]);
outTrans = easeIn(time, outPoint, outPoint - trans, [0,0], [snapScale, snapScale]);
value+ inTrans + outTrans
If you prefer to use Z space position instead of scale, try this one:
//Snap zoom in and out: apply to Z space position
zoom = 5000; //distance to zoom
trans = 4; //  transition time in frames
trans = trans * thisComp.frameDuration;

inTrans  = easeIn(time, inPoint, inPoint + trans, [0,0,zoom], [0,0,0]);
outTrans = easeOut(time, outPoint, outPoint - trans*2, [0,0,0], [0,0,zoom]);
value+ inTrans - outTrans
by Harry J. Frank, graymachine.com


(Min. Version: After Effects CS3, Category: Text-FX, Type: Expressions)
posted by MadDocc on Feb 24, 2010

 

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