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Shaking problem when collision - webmagic - 13-05-2025
Hi Obi,
for example , I have a ObiSoft body obj A (with Kinematic for particle set)
and then, I use another CUBE with Obi Collider to touch the obj A, the obj A keeps shaking
what I want is just the obj A shape changed like Jelly (the soft body!!) ,
but it keeps shaking so fast.
What can I do ?
Thanks
RE: Shaking problem when collision - josemendez - 13-05-2025
Hi,
(Yesterday, 10:57 AM)webmagic Wrote: for example , I have a ObiSoft body obj A (with Kinematic for particle set)
Softbodies don't have a "kinematic for particles" checkbox. Only rigidbodies do, since that setting does not make sense for a softbody.
(Yesterday, 10:57 AM)webmagic Wrote: and then, I use another CUBE with Obi Collider to touch the obj A, the obj A keeps shaking
what I want is just the obj A shape changed like Jelly (the soft body!!) ,
but it keeps shaking so fast.
I don't understand your setup: you have a softbody and a cube, but I fail to see the role "kinematic for particles" plays here since that's only possible for a rigidbody. Can you clarify this?
Keep in mind that having a softbody and a rigidbody component on the same object does not make sense, if that's what you did: an object can be either soft or rigid, not both at once.
kind regards,
RE: Shaking problem when collision - webmagic - 13-05-2025
(Yesterday, 11:02 AM)josemendez Wrote: Hi,OOPS, you are right , the rigidbody is not necessary,
Softbodies don't have a "kinematic for particles" checkbox. Only rigidbodies do, since that setting does not make sense for a softbody.
I don't understand your setup: you have a softbody and a cube, but I fail to see the role "kinematic for particles" plays here since that's only possible for a rigidbody. Can you clarify this?
Keep in mind that having a softbody and a rigidbody component on the same object does not make sense, if that's what you did: an object can be either soft or rigid, not both at once.
kind regards,
BUT , even I remove the rigidboy.
The soft body still shake so fast when collsion with the CUBE.
RE: Shaking problem when collision - josemendez - 13-05-2025
(Yesterday, 11:30 AM)webmagic Wrote: OOPS, you are right , the rigidbody is not necessary,
BUT , even I remove the rigidboy.
The soft body still shake so fast when collsion with the CUBE.
Can't think of a reason why a softbody would shake upon collision. Does this happen in any of the included sample scenes?
Would it be possible for you to share more details about your setup? (blueprint settings, solver settings, etc)
RE: Shaking problem when collision - webmagic - 13-05-2025
here is the solver and obi soft body and obi material setting.
we have a monster in Full body volumetric softbody.
When use a cube(weapon) to touch the monster, the touch area of the monster shaking ver fast.
your example video: https://www.youtube.com/watch?v=5YjbqyL_4Q0
so can you share your setting of it ?
RE: Shaking problem when collision - josemendez - 13-05-2025
(Yesterday, 11:49 AM)webmagic Wrote: here is the solver and obi soft body and obi material setting.
we have a monster in Full body volumetric softbody.
When use a cube(weapon) to touch the monster, the touch area of the monster shaking ver fast.
Not sure if it's the cause, but your collision material parameters don't make any sense. A negative distance for sticking is usually not what you want, and rolling contacts on softbodies are also not something you'd usually use. Set the stick distance to zero and disable rolling contacts.
Also in your solver you have a shock propagation value of 0.66, that's extremely high. Shock propagation is only used for piling lots of objects, and even then quite low values are typically used (eg 0.01).
You have surface collisions enabled in your softbody, for full-body volumetric setups this is typically a hindrance rather than a benefit because of the huge number of simplices that will be generated. Disable them.
Let me know whether these changes improve behavior.
kind regards,
RE: Shaking problem when collision - webmagic - 13-05-2025
Yes, it's better than before, the shake remains but may accetable.
Thank you