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December 7th, 2010 By Harry Frank

Motion paths in Particular can be tricky. Harry Frank brings you this overview of how to set them up, and a foolproof way to align the spline in 3D space with a simple expression.

Expressions used in this tutorial:

Particular Emitter Position XY:

pos = thisComp.layer("Motion Path 1").position.valueAtTime(0);

[pos[0], pos[1]]


Particular Emitter Position Z:

thisComp.layer("Motion Path 1").position.valueAtTime(0)[2]


You can also use this preset Harry created for AE CS4+, to use (with a try/catch thing so it doesn't error):

redgiantpeople.com/​Explore/​PresetDetail.aspx?PresetId=1637