VEX Pop Help

[athomas]

I am fairly new to VEX and would like to achieve the following

count particles at every frame for soucres A & B

get the number of particles from A colliding with B

if the number of collisioned particles is more than 30% of total particles in the scene

then birth particles from source C (or location)

Any help would be greatly appreciated.

Cheers

Andre

[old school]

Phew. POPs aren't meant to work in such an absolute way. You could do this outside in SOPs then reference that back in to the POP network. I do remember a post a day ago that gave you this solution. It should work as the pop SOP has to keep up with the POP network it is referencing. The two are inter-dependent inside the Houdini cook method. Watch out for recursion though.

POPs are simply rules. You need to use a Pop SOP to reference the Pop rules in a real context.

You describe what you want to do but what is the effect you are trying to achieve?

[athomas]

The effect I'm trying to achieve is basically,

when two fluids or streams are colliding it changes their disrtibution patterns and depending on the force can look like an explosion.

I like to achieve this without SOPs, so you can easily change position, terrain etc. without having to worry about adjusting your collision geometry and I thought it may be as well achieved using VEX rather than writing a script.