Nacère Guerouaf

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Deleting point based on attribute? May 16, 2018, 8:48 a.m.

Hi everyone !

I think that my question have connections with this thread. I want to delete some elements (cloth, rbd) depending on their active attribut.
From here, nothing difficult but I want to apply a “delay” on the delete. Like delete elements after an amount of time activation (similar to age for particles) AND with randomness in this delay.

I wonder if i can give float value to activation? Because now it's strictly 0 or 1. And maybe use that in wrangle:

if (@active > ch('threshold')){
removepoint(0,@ptnum);
}


Maybe wrong code, I'm pretty new with vex… and with that there isn't randomness too.

EDIT: stupid question about float value. I guess that an object can just be active or inactive. Maybe more on the way “age of activation”?

Ship reactor Jan. 29, 2018, 10:48 a.m.

Anybody? Just want to add the rotation of my initial alembic from Maya to my fire pre-calculated in Houdini. Or another way to parenting this two elements..

I take this opportunity to ask another question: in my scene my groundplane catch some light of my fire. How can I keep just the light without the geometry of the ground? Light disappear with a matte_shading or shadow catcher..

I attach pictures for my two problems

Thanks !

Ship reactor Jan. 24, 2018, 12:35 p.m.

It does not seem to work with this method…
My ship was animated in Maya so i don't know if Houdini have the right informations.. I can see center positions but nothing about translate, rotation or scale

My problem is surely an amateur thing. Maybe with an animation constraints or something like that?

EDIT: Center positions of my alembic give me translate animation as I suspected but my object turns on itself at the beginning. My fire doesn't follow the rotation of the spaceship. Any idea?