Sticking Objects Together in Vellum

[RyanJP]

Hello, I'm relatively new to Houdini. Just playing around with Vellum, which is amazing, and can't quite figure out how to get an object to stick to another. In the demo video you see the rubber toy stick to a spider web- this is the basic gist of what I'm trying to do. Is it the Glue constraint I should be using? Any help much appreciated!

[mangi]

Hi Ryan,

I did a test and it can stick by using a vellumconstraints "TYPE GLUE" and it will stick.

There is probable another way , I just did it on the fly. 

MANGI

 

 

Edited October 14, 2018 by mangi

[HM_2020]

http://www.sidefx.com/docs/houdini/dyno/vellum.html

 

[RyanJP]

18 hours ago, mangi said:

Hi Ryan,

I did a test and it can stick by using a vellumconstraints "TYPE GLUE" and it will stick.

There is probable another way , I just did it on the fly. 

MANGI

 

Yes this sent me on the right path, thanks! I was trying to do it in the SOP but the constraint DOP actually allows you to calculate constraints on every frame which did the trick for me. Not sure how yours works actually without selecting that option but uh... good for you I guess, haha. Also it's not necessary to change the group to Points for me :/

Edited October 15, 2018 by RyanJP

[Kirosana]

Hey, hijacking this topic to not create a similar one.

 

I'm trying to make some (RBD) to stick on a moving Vellum Hair object. Using the Glue Vellum constraint, the Hair is sticking to itself and it's creating artifacts everywhere. I don't find a way to do differentiate the Hair and the RBD so that the Hair can only be glued with the RBD, and not with the hair itself ?

I tried playing with the "Define Pieces" and putting a unique attribut on the Hair and the RBD but nothing change.

Thanks !
 

Edit : The issue was the auto sleeping, processing the grain and the hair as well at the beginning of the sim. And putting the Hair in the Geo Group, and the Grain to the Target Group as well.

Edited November 30, 2018 by Kirosana
Found the solution