VOPPOP question

[Ezz]

Hey good peoples.

I am knocking of a thick layer of rust on my vectormath. Well Houdini is

a good place to learn and play :-)

So I have a little question that I need some help to figur out.

I have a POP-network containing a LocationPOP - So I want to emit

the particles from (0,0,0) evenly spaced forming a starlike movemen/figur.

How can I achive that in VOPPOP ?

Any help would be much appriciated

Thank a lot.

Erik

Edited April 29, 2009 by Ezz

[chumbuk]

direction of the velocity turns discreetly to a certain angle, depending on the ID particle

angle_velocity.hip

[Ezz]

direction of the velocity turns discreetly to a certain angle, depending on the ID particle

Hi Chumbuk

Thank you very much - Its a good solution.

I came up with this suggestion in the meantime - And it works good.

I used trigonomical-functions of the $ID and adjusted the frequence to fit the amount of particles so that

I get them nice an even distriputed.

But there is something that puzzles me, is when I connect my VOPPOP with

a SplitPOP it gives some strange result.

Erik

emit_as_circle.hipnc

[johner]

I came up with this suggestion in the meantime - And it works good.

I used trigonomical-functions of the $ID and adjusted the frequence to fit the amount of particles so that

I get them nice an even distriputed.

But there is something that puzzles me, is when I connect my VOPPOP with

a SplitPOP it gives some strange result.

Erik

It's because you're using npt as a variable in your VOPPop, and when you add a split POP it's taking into account the number of split particles as well. So you'll need to count only your primary particles if you want to use your formula. Or use something like chumbuk's. Or, and this will teach you nothing about vector math, just make a really small circle, add normals, and emit from that. See attached.

star_from_circle.hip