Crowd Sim popping animation

   1651   3   1
User Avatar
Member
5 posts
Joined: May 2017
Offline
Hi,
I've been using Houdini for a little while now and just getting into crowd sims. I wanted to setup one using the example crowd sim provided in Houdini. I grabbed a model from MakeHuman and animation from Mixamo. I was able to get it mostly working but when i run the sim there's random popping that happens that looks like the rig or cache is breaking. I can't seem to find out where this is coming from and I'm not sure what to even search for. I'm attaching my scene if anyone can give it a look or point me in the right direction I would appreciate your help.

Attachments:
sim_test_v01.zip (5.4 MB)

User Avatar
Member
2625 posts
Joined: June 2008
Offline
You probably need to resolve the bone name errors I see when I try to bake your agent.
Using Houdini Indie 20.0
Windows 11 64GB Ryzen 16 core.
nVidia 3050RTX 8BG RAM.
User Avatar
Member
5 posts
Joined: May 2017
Offline
Oh strange, I didnt notice those before. Going to see if i can use a different export other than fbx maybe to fix this. It looks like Mixamo and MakeHuman are applying animation to the geo instead of the bones themselves? Ill try a collada file maybe.

Also the issue goes away for the most part if i just turn the retiming off in the sim. Not sure what that means but it only pops when its being retimed or in a transition point.
User Avatar
Member
5 posts
Joined: May 2017
Offline
Ok so i've fixed it? Not really sure what it was since I still get the errors when baking the agent but here's what I did;

Under the assumption the rig and or the way the file was structured was the problem I imported the file FBX from MakeHuman into maya first (unsure if this step is necesary) and exported it back out of maya still as an FBX. This seems to restructure the FBX when importing into Houdini, perhaps an issue with how MakeHuman is exporting.

After that I used Mixamo, although it didnt recognize that my file was already rigged so I used the auto rigger and downloaded the FBX file. I still get similar error messages but as far as I can tell no popping or glitching.
Edited by jreeves - Sept. 26, 2018 17:23:47
  • Quick Links