Jump to content

Sand Simulation


TimLG

Recommended Posts

Hi!

I'm a student at NAD in Montreal and I'm trying to learn Houdini.

I have a project in which I need to simulate sand on top of a falling rocks RBD simulation, which is on top of a FEM sim. (The FEM is the deforming ground)

So I cached every collision objects with the CollisionSource node (with 4 substeps to match de grain solver).

Now, if I simulate the sand, it explode on random frames. (see flipbook here: password: sandsim

This is my second attempt and it still explode (at fist I used 10 substeps)

 

Does somebody have any ideas on what could be the issue?

 

Thanks 

MountainGrowth_47.hipnc

Link to comment
Share on other sites

After some tests, the problem comes from the animated rocks. Even without animation on the rocks, the sand explode.

In my DOP, I load only 1 cached VDB of all the rocks as a collision object.

I tried to switch from a POP Solver to a FLIP Solver just to see the CollisionGuide of the rocks (how the solver see the rocks) . And it seems fine.

 

Any ideas?

Link to comment
Share on other sites

Ok, so now I know that

-It's working with static and not cached rocks

-It's NOT working with animated and not cached rocks

-It's NOT working with cached rocks, animated or not

(all tests with no substep)

 

Now I think that I may need to send to the DOP Network my 800 rocks separately... but how?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...