This compound animates the strand using the mathematical sine function, which creates an undulating wave motion. You can use this compound to animate the strands when using an unsimulated ICE tree (such as if the point cloud's ICETree node is in the Modeling region).
Create strands, then plug this compound's Execute output into a PostSimExecute port on the Simulation Root node or in a port on the ICETree node.
For information, see Shaping the Strands [ICE Particle Simulations].
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