[André Macedo]

Hi Darbi, thank you for responding –

Ok, 1 spherical field per emiter.
and, Trapcode Form would allow me to use 2 spherical fields per emitter.

– – – – –

Let me explain you better what my project is about. Its kind of a simple video mapping.
I have a white face mask, hanged on a wall i want to beam to. I am producing the video in after effect, and using particular.
I vectorized the outline of the mask + both eyes, resulting in 3 closed vector strokes.
I am already emiting particles (little dots) from both eyes, through layer emiter.
I want these particles to spread along the whole face, with the exception of 2 areas of the mask where i didnt want my particles to go.
These 2 areas were too drawn in vector strokes, nothing very sketchy..

And this is what ive so far.
So, testing the spherical fields, i have came up with 2 issues to resolve:

A)
Tell these 2 areas, (ideally) custom bezier or bitmap shapes, wich right now are circular spherical fields to repel the particles emited.

B)
Tell the outline stroke of my mask to repel the particles that — for this, i guess my outline stroke would have to be a Spherical Field itself.

– – – – – – – –

If theres the need for me to change to FORM:
– Do i need to forget about particular, and re-asign my emiters ?
– If i can still use particular, can my 2 existent emiters, and “connect” them to Form Spherical fields?

Note: i have form 2.0.3, if i changed would i be able to do this with this version?

Thank you very much!!
André Macedo

[André Macedo]

Hi John!
Thank You very much for your attention.

I have been watching your example layer order and trying to understand its logics.
I think i understood the use of the expression, wich is to link the layer containing the shape in the precomp, with the link in the final comp, containing the mask (will give me the exact same vector stroke).

Also, i think i understood that the particule emiter is Alpha inverted matte, below a mask (copied with the expression above), so that only the exterior of shape is seen.

Thank You.

I have another question, related with the physics, in trapcode particular wich is:

Can i customize a shape to do what the spherical field does (physics>Air>Spherical Field)? My objective is now to create a custom shape, so that the particles dont go to certain parts of my comp.
I dont seem to have that option, and someone told me to use trapcode form — should i go in that direction?

Again, thank you very much for your time.
André