Particular in 3D with a camera

[Rob Hindley]

maybe parent both the object and particle layer to a null then parent that null to the camera null?

Gribble
::: Time flies like an arrow but fruit flies like a banana :::

[Paul Prescott]

The the object and the particles must move independantly of the camera ….. so parenting everything to the camera wouldn’t work..

The camera is just dollying in towards the scene and the object with the particles are dancing in front of it and then going off deep into z space..

My problem is that when I move the camera inward the particles appear to ride higher and higher in the scene. so the camera is just not seeing the particles the same way that it sees the object..

Everything works fine as long as I don’t move the camera.

[Kevin Camp]

check the values of you emitter and the values of your nulls position as you step thru your animation.

if they are not the same, check your expressions and make sure they are correct. they should look something like this:

xy position:
temp = thisComp.layer(“Null 1”).transform.position;
[temp[0], temp[1]]

z position:
thisComp.layer(“Null 1”).transform.position[2]

Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW

[Kevin Camp]

also, if your null that your emitter is pulling coordinates from is parented to another layer, then the nulls position/anchor point is relative to the layer that it is parented to…

so if you have a parenting hirarchy like that, you’ll need another 3d null and an expression to convert the parented null’s positon to the compositions space to use for your emitter….

follow this thread:
https://forums.creativecow.net/thread/2/951457
about half way down, starting with francisco’s post, where he was trying to do the same thing.

Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW