Hi there!

I'm new in Houdini, using now Houdini 16 Apprentice. I think my question may be very noob but I really don't find an asnwer.

I'm doing a Flip sim with the shelf tools. Just a flip tank and an animated sphere as static object. In the Collision Source node of the sphere I'm using velocity with central difference. The problem is that in the geometry spreadsheet, the value of the v attribute is 0, in x, y or z. Seems that velocity is not influencing my sim.

How to compute velocity of the sphere (or any other collision object) in H16 to have an impact in the fluid?

Thanks in advance!

Recreate your scene but instead of choosing static object for your sphere collision use Deforming object. Or dive into your existing AutoDopNetowkr and select the StaticObject node. On the StaticObject node enable deforming object and or inherit transform. It depends upon where you have animated your sphere. Standard Houdini practice is to NOT animate at the top level. Instead drop down a Transform node inside the Geometry node and follow that up with a Trail set to compute velocity. Animate the Transform node inside.

Thanks Enivob! Worked perfectly!
I was animating it in the top level. I recreate my scene and now I can see the velocity impacting my sim.
Thank you very much!