Camera POI to Particle emiiter to Layers Position.

[Will Cavanagh]

This is fairly straightforward using expressions. I like to add the “Value” parts of these so that you can adjust things later if you wish. If you keep these in, you will need to set the value sliders to 0 first (set the emitter position to (0,0) in Particular, and set your camera’s POI to (0,0,0).) If you don’t need to use these just remove the “+value” part from each expression. Keeping them in will allow you to keyframe the relative position of the emitter, and have the camera tilt/pan.

First, to link Particular’s emitter to the layer…

Particular uses a seperate XY and Z property, so we’ll need to attach them seperately. First set the XY emitter position equal to an expression like this one:

temp = thisComp.layer(“YourLayer“).transform.position;
[temp[0], temp[1]]+value

Where YourLayer is the name of the layer you’re linking to. Then, set the z similarly with:

thisComp.layer(“YourLayer“).transform.position[2]+value

Then, to set the POI of the camera, use something like:

thisComp.layer(“YourLayer“).transform.position+value

[Eran Solomon]

Hey,
Thanks a lot for the help!

I’ve encoutred a first problem which is ..
when I link the XY of the particular to the layers position, its all good.
but when I link the Z , the smoke suddenly offsets off the layers. (alot..)

Any solution to this ?

[Will Cavanagh]

Double check that the values you have set for the XY and Z sliders are all 0, that the layer you’re attaching to is in 3d space, and that you have a camera in the scene.

Try orbiting around to see if the particles are lined up correctly on one or more axes, but not on others… Is the Z correct, but XY not? Without seeing what’s happening it’s hard to say what went wrong.

I’ve also never used Horizon, so I don’t know if this could be affecting things (I would hope it would play nice with other RGS/Trapcode products.)

[Eran Solomon]

Thanks for your help Will, solved my problem 🙂