Is there a way to enable interactions with a unity particle system and Obi Soft body?...i suspect not

I seem to suspect it shoudl be possible with an OBI partilce system....but i cant seem to find out how to create an Obi Particle emitter... ( i have Obi soft body and Cloth)

essentially i want to simulate a  ( bio science) cell being targetted by a swarm of rigid body spheres.


any advice much appreciated

thanks,
DUncan

(Unity 2022.3.61f1, Obi 7.0.5, Windows 10)



Hey there, I've recently been updating my project from Obi 6 to 7, and also switching to use the GPU compute solver. I noticed in the editor after some testing and re-starting play mode, it would pop up 12 warnings with this:

Hi,
Using Obi 6.3. 
Here is my setup:
3--2-----1

1,2,3 are attachment on the rope.
I'm trying to extend or rewind the rope at these two position
3--2>-----<1 where > < can be < > (cursor direction), meaning rope can extend from the two points or rewind from the two.
It works fine with the one next to 1 (the start of the rope, cursor is at 0, source at .5
But if I try to place the cursor next to the 2, something like cursor at .3 and source still at .5 it behave differently, no particle are added to the rope at this position.

Is there something I should know about cursor and attachments?
Edit: IF I understand correctly one of the issue is, when the cursor is at .75 and the rope is getting bigger, the cursor move, so I need to find a way to dynamically set it to one particle...
Thanks a lot,

Hello,
I managed to save and reload particle positions in ObiRope v6.x using code under the Copy ropes in play mode thread. However, this no longer works in ObiRope v7.x. Could you help me identify what I might be missing?

Here’s my current code:

Hi All, thanks in advance for taking a look.

I am working with attachments for the first time using Obi Fluid. I am able to create the attachment with a proper target and particle group, but when adding particles to the particle group, nothing happens.

Additionally, if I try to disable/reenable the attachment at runtime (which I don't even think is necessary if I'm just adding/removing particles), then unity crashes and gives the GPU error "Failed to present D3D11 swapchain due to device reset/removed". I am using compute backend.

Do I understand correctly from documentation that only cloth has simulation of aerodynamics from particle velocity?
Is there a way to enable this, or do I need to do this by code or apply fake "wind" each tick? E.g. apply aerodynamics on bones for ears when moving a character.

Is it possible to have the root bone be part of the chain as if there was a parent transform with same position and rotation with "Fix Root" enabled?

I feel this should be a opt in to have the root bone be driven by animation or fully simualted. It is not great for workflow to have to modify existing rigs to enable this behaviour.

Hi, I've been heavily using Obi (cloth and rope) for several years now in the development of Following Seas. I'm quite happy with it overall, with really the biggest issue coming down to performance. Typically about 30-50% of total profiler load goes into the system -- which has been acceptable, but definitely reduces the number of runnable systems for users.

I've been looking into Obi 7, as performance seems to be a major focus, and have also split into a separate project branch to test it out -- but have a couple questions if you don't mind.

I'm struggling with the removal of Proxies -- are there any plans for a similar system, or revisions to the decimation? I like the automatic decimation, but I find that there isn't near the control that was available with proxies. For example, my cloth meshes rely on specific groups for attachment points, like the rays of a battened sail, or the corners where ropes would attach. Decimation on my more detailed meshes often causes these points to be far off from where they should be, or causes topology lines to become very wobbly due to merging inconsistently up and down when parallel lines of vertices are present. It would be nice to exclude vertex groups from decimation, or have a method of ensuring the shape of the mesh isn't overly affected.

I didn't see any method for controlling this, do you have any suggestions?

Secondly, it seems that ambient force zones have been removed -- is it preferred to have a wind force zone follow affected objects around, or to set wind directly through the solver?

I've attached a beautifully rendered version of my struggle with blueprints. The left indicates the result gained via the Obi 6 method, with the red dots representing vertices on the simplified mesh. The central black line is a group used for particle attachment, and the red corner is a point were a rope would attach.

On the right is a somewhat dramatized example of what I'm encountering through decimation.

   

Hello,
I am developing a project using the system in your Hook project as a reference. I can lengthen and shorten the rope, but the rope has problems interacting with colliders, as far as I understand the particle count is low. How can I increase this? If my method is wrong, please tell me.
When I wrap it around an obstacle, the rope vibrates.

Example of the project I am trying to make: https://play.google.com/store/apps/detai...lley&pli=1

Point A is fixed, point B is moveable.

Thank you

           

I have a soft body that I want to attach to a 3d object. When I work at the scale I want (size of around 0.1 units), it has zero structural integrity. I tried decreasing the mass of the particles but that didn't work. If I work with meshes around size of 1, then I can attach the soft body to an object and it has some structural integrity but it still flops around too much. Tried tweaking lots of params  (e.g. deformation resistance) but still the same. In older versions there was a control to increase connections between particles that has gone now. What I really want to achieve is to be able to interpolate between a rigid and a soft body, e.g. increase the stiffness of the spring programmatically between each particle. Can't see any kind of functionality like this exposed though. Any ideas?