Flip fluid ptnum changes over time

[bricecrv]

Hello,

I would like to interpolate the points of a flip fluid to test the slow motion.

The problem is that the ptnum of each point changes over time.
Do you know how to fix this problem?

Thank you very much,
Brice
 

[3dome]

use id attrib to track a point over time

Edited November 27, 2018 by 3dome

[ikoon]

It is off by default. You may need to turn it on and resimulate:

[evanrudefx]

if you drop a visualize node and set the type to marker and attribute to id you can see each particle's id in the viewport. I do this sometimes to delete stray particles

Edited November 27, 2018 by ejr32123

[bricecrv]

Thank you so much!
I understood that the problem with ptnum comes from resseeding.
I will test with the id directly to see if it is possible with reseeding,

Thank you.
 

[bricecrv]

The problem of the id is the same as the ptnum.
With reseeding it creates particles with the same id or ptnum.
Do you know how to solve this problem ? 

Thank you.

[3dome]

can you attach your scene? ID should always be unique, unless you create it yourself in VEX and mess up lol

just tried it myself, IDs get assigned as expected

Edited November 28, 2018 by 3dome

[bricecrv]

This is the scene.
I think that for interpolation reseed is a problem. 
But there are still several ids with -1.
what do you think of it? 

ID-reseed-01.hipnc

[3dome]

yeah i had a few of them too, but in a million points if you blast those guys away no one will notice

dropping down a timeblend and timewarp gives me pretty nice slowmotion

[bricecrv]

Oh great, thanks for the advice, that's very helpfull !

Thank you very much