Restrict Particles to an Axis

[YourDaftPunk]

Use a particle expression to kill the position on the Y axis:

vector $pos = particleShape1.position;
particleShape1.position = <<$pos.x, 0, $pos.z>>;
Make sure the expression is added to both Runtime After Dynamics and Creation.

A second alternative would be to add a Drag field with Direction turned on and set to (0,1,0) and a magnitude higher than your turb field.

-shawn

[Aikiman]

If you dont want all your particles to be placed at zero in Y then swap out position with velocity.

[fallenrelics]

thanks shawn,

i was close but maya didn't like
<<particleShape1.position.x, 0, particleShape1.position.y>>
so i thought i was barking up the wrong tree.

as for the drag method, it definitely helps flatten the particle volume, but i couldn't get it acting on a perfect plane. i suppose that method is more for adjusting the particles to be flat instead of setting them exactly.

thanks again.
paul

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