Creating realistic Beer foam

[creationz]

Hello to all. Did any one had any luck with realistic "BEER FOAM" setting using the "beer foam" script? I can use the script well but the foam sets on the bottom and the liquid on top. Just some settings that will produce good results will be helpful. Any help will be great. You guys are great for creating such a needed forum for people like us. Thank you.

[shaun_michael]

Is the density setting of your fluid greater than the density setting for your foam? The foam needs to be less dense so that it floats.

Shaun

[creationz]

Yes, the density is set correctly, but i still not getting the "look" i want. I played with settings but still no luck.

[shaun_michael]

What sort of look are you after, and exactly how does it differ from what you're getting. This may be down to other settings in your fulids rather than just the density of foam vs fluid. Do you have your emitter settings and a quick description of what you're after?

Shaun

[Robb Flynn]

Hi,

if you want to create realistic beer foam with Rf script, you have to improve the basic script.
Because the basic script just create foam when particle collide an object.
The problem is, there are always some particles colliding with the object faces and so, there always be foam around the beer.

The basic script works like this:

if a beer particle collide an object face, the particle change in foam.

what you need is more like this :

If a beer particle collide an object face, the particle change in foam and if the particle foam is less than a velocity like 1.0 and below a height like 2.0 change it in Beer.
(the value of velocity and height of course depend of your scene size)

you can add a random script on the beer emitter too, if the particles emit with the emitter beer have a velocity higher than 10.0 for example change it in foam.

it's the basic idea to create realistic beer foam behavior.

I already made test and it works well.

Cheers

[shaun_michael]

Hey Robb, thanks for that.

I already made test and it works well

Any chance you'd care to share your script? ... go on... it's Christmas after all...

Shaun

[brandony]

robb is right.. this is the basic outline of my spray script i wrote for my hallway flooding. i even wrote one which goes back and forth into different emitters.. so the foam changes to liquid and vice versa.

[shaun_michael]

Indeed it should. Perhaps, in conjunction with thomas, we can evolve the basic foam script that was one of his turials to include this important feature.

Shaun

[bealobo]

I'll try to help with this one on Monday.
I have another version that converts the foam back to beer randomly in time, but it does not look good.

By the way, I think the basic beer foam script can look good to make air bubbles inside a puring fluid.
Has anyone try to render this?
It is like meshing all the emitters together and additionally render foam as air particles (cristal).

[bealobo]

Hi!

I have made a version of the script with Robb Flynn's idea (I wrote that int he heading of the script too, let me know if you prefer a link or similar):

Medium Beer Foam

I haven't tested it very much, but I think the effect looks good.

Also, I think it can be optimized because right now it's importing a functino from a library at every substep, and that's probably not 100% ok for performance.

lease note that it works on axis setup where Y is the vertical axis.
It's easy to change thought:

Just replace this line

FHeight = foami.getPosition().getY()

to match the axis you need


FHeight = foami.getPosition().getX()


FHeight = foami.getPosition().getZ()

Cheers,