Sop Animate Attribute in DOP

[philippecounter]

Hello everyone, I hope you are doing well under the houdini 19 sun.

Today I'm trying to do something that I thought was "simple" but I can't find the solution.

I try to import the animation of my @Cd in dop in order to control the "force" to be applied to my boxes. but when i look at the geometry spreadsheet in DOP, my "cd" attribute is static ...

[Sepu]

you need to fetch the attribute into dops, you can do that with a wrangle and point function.  if not just the first frame gets read. I can't really see what is that pops or rbd? if is rbd make sure that override attrib... is checked on the packed object node.  Post your scene to help further 

[philippecounter]

Thank you @Sepu, my problem came from the "overide attribute" function (I thought that by checking this option, i will overwritte the base attributes, whereas it is the reverse, if I understand correctly, it import attributes from sop).

Now i can control with pop wrangle, for exemple, if my objects are active or not but i can't use my "Cd" attribute to control, for exemple, the force scale of my pop attract...

Do you have any idea how to do that ?

 

Test_RBD.hiplc

[Sepu]

use vex expressions and just multiply by the parameter so forcescale *= @Cd.x; 

You can do this pretty much with all parameters 

 

Here is a similar example
 

 

Edited October 29, 2021 by Sepu

[philippecounter]

Thank you so much

So , to resume for people who will read this in future :

I want to control a parameter in pop force (like the forcescale), with an attribute that i had animate in Sop level (in this exemple Cd).

For this, in DOP you have to :

- In RBD Packed object, enable "overwrite Attribute" and type in the attribute you want to use (in this exemple, Cd)

- In the force (in my exemple, PopAttract), you have to enable "use VEXpressions" and type the commande, WITHOUT "@" before the parameter name, in this exemple "forcescale *= @Cd;"