Adobe After Effects CS3 User Manual

Page 591

AFTER EFFECTS CS3

User Guide

586

Example: Match camera’s focal plane to another layer

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Apply the following expression to a camera layer’s Focus Distance property to have its focus distance match the

distance to the anchor point of a layer named “target”:

target = thisComp.layer("target");

V1 = target.toWorld(target.anchorPoint) - toWorld([0,0,0]);

V2 = toWorldVec([0,0,1]);

dot(V1,V2);