Age of an attribute

[Macha]

I want to find the age of an attribute, starting from once it has passed a certain threshold.

I tried the sop solver but my geometry is deforming and it appears to reset it every frame.

Is there a pure SOP way of doing this?

[Macha]

An example with the sop solver that doesn't work.

I want to start counting once $CR is higher than for example 0.2

crap.hipnc

Edited July 15, 2010 by Macha

[NagyG]

An example with the sop solver that doesn't work.

I want to start counting once $CR is higher than for example 0.2

with chop.

G

crapchop.hipnc

[Macha]

Well, I made some progress.

In the file below I emitted particles and attached the nearest geometry $PT as an attribute and the made groups out of it. The idea is that now I can count how many particles are in each group and then use that as an age. It's quite acrobatic and I have to solve this problem before it works:

I have groups named

att_age_123

where the last numbers represent the $PT of the original geometry. Now I have to count the members of that group ( pointlist ? ) and apply that to the point number indicated in the last 3 digits from the group name.

Any ideas?

[Macha]

an image for aid.

Oh Gergely, I missed you there. Thanks for the cool CHOP but I wanted to avoid chops this time (I often get problems when the geometry is too heavy, using dops, or point count is changing)

Edited July 15, 2010 by Macha

[Macha]

Dang, I forgot the file, and I always need to start a new post to attach it. Sorry...

crap_better.hipnc

[ikarus]

in the past if i wanted to use a sop solver with deforming geometry i would just create a copy of the geo, having it non-animated, and use that as the place-holder for the sop solver, then i would dop import that and copy the attributes to the deforming version

would this solution not work for you?

[Macha]

Interesting idea Ikarus, I'll give it a go.

Here's what I did with it:

Edited July 16, 2010 by Macha

[ikarus]

hah nice work, your visualizations are always pretty and clean