Particles – to weave their way thru layers alpha/brickwork.

[Andrew Yoole]

You could try and fake the effect by letting the particles collect on the wall, then use a second particle generator to act as the escaping particles. Or manually animate the individual cells that escape.

Otherwise, you might need a true 3D application, where the particles and wall exist in the same 3D space, to achieve the effect you want.

[Mike Clasby]

Hey, I dunno but I may have stumbled across what you need, not perfect but it tries real hard to work.

First, Dan’s expression for magnet repel from an earlier post:

https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=729630&archive=T

p = thisComp.layer(“layer 1”).position;
r = 200000; //repulsion constant
dist = length(position,p);
dir = normalize(position – p);
offset = dir*r/(dist*dist);
value + offset

Read the post to see how to adjust the expression.

Anyway I made one particle, made it 3D, set keyframes for position to send it along a path. Later after I add the “layer 1″ (the Brick layer, your skin cells) I duped the particle layers and offset them in the timeline so I have a trail of layers following each other.

So for ‘layer 1” the brick layer, I used Shatter on a solid, brick pattern, I precomposed the layer sending the shatter with it. Anyway, using a still from the middle of the shatter (you could also up the viscosity a bunch to slow the shatter down to a crawl), when the brick aren’t widely spaced, I placed “layer 1” in the middle of the path, and sure enough the particle layers weave their way between the bricks… most of the time, a few go through the brick but I bought it. The particles take different ways through the brick field when I moves the brick layer up and down. I liked the look of the dodging particles, maybe it will work for you, pretty quick to test out.

[Max Bretherton]

thanks yikesmikes for that.

i did think that Dan Ebberts would have an expression that could help. i animated a ‘band’ playing music using expressions and ‘sound keys’ some time ago.

but i also thought it would get beyond my control – expression language wise.

i will try the expression you gave me.

i have solved my problem, had to get the job done, by just animating lots of different paths/routes for water particles/dots to take. and then duplicating the layers and off setting em over time + a little ‘wiggle’ now and then.

worx fine but not the neatest solution – particles would be.

thanks for your time and help though.

regards…max

thanks and regards…max