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Emit particles with particular from light parented to a null
Hi,
I’m trying to emit particles using particular from a light that is animated along a path. Problem is because the light is also parented to an animated null at the same time, Particular cannot read the actual position of the light.
I can’t parent particular to the null simultaneously as that just moves the layer around.
I vaguely know I should be using layer space transforms, but any combination of toWorld and toComp doesn’t work. Even when I get the particles following the right path of the light, it doesn’t pick up on the parented null.
I can’t change the way the comp is built, or the way the null is animated. It’s a finished comp and I just want to add particles to it.
Any ideas would be much appreciated. Many thanks!
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3 Replies
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You could use a null parented to the null instead. You’d need to use the toWorld() expression in both the XY position and the Z position property of the emitter (use an emitter shape that allows you to animate these properties).
I often like to use a Layer expression control effect to point particular to the layer I want my expressions to use.
Darby Edelen
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Thanks for your reply, but I still can’t figure it out.
I’ve already linked the position of the emitter to a null moving along the right path. Now, I want to offset that expression with the animation of another null. How do I create this parenting with just expressions?
Many thanks!
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The toWorld() expression should reference the null at the end of the parent/child chain in your case. There is no need to reference the parent, it’s only there to facilitate the childs animation.
Darby Edelen
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