Hi Obi team, thanks for developing the GPU version of Obi plugins! I got it to work on Windows, but it doesn't seem to work on my Ubuntu 20.04 system. I tried multiple Unity versions, including 2023.1.0a21, 2021.3.27f1(LTS), and 2020.3.48f1(LTS) but none of them worked. 

My GPU is a 4090.

The error logs are in the attachments.

Any help is appreciated!

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I have a similar setup as the above image,  How to know if the rope is not tangled anymore? like in the first image. I have enabled the surface collisions and tried with OnParticleCollision but it has not worked for me. can I ray cast from each particle of the rope a bit upward and check if it has collided with another rope? or is there any other simple workaround for this? 

We are using OBI on the standard render pipeline. Our water renders fine in-editor, but when built is invisible. There are no shader or burst related errors in the player log. I've also disabled all shader stripping.

Does anyone know why water would render in the editor but not a build, besides shader stripping?

I've tried reaching out to the OBI team about this, but their mailer is blocking me as spam with the following error:

Hi,
We need spiral cable kind (eg. telephone cable). Kindly help us to achieve to create spiral cable using obi rope.

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I'm trying to make a simulation of many sphere-shaped cells that swim around and squish into each other, with each sphere being a Softbody actor in a single Solver. Ideally I'd like to be able to change the size of a single cell during runtime, for instance if one eats a food particle it will bump up in size slightly. The bigger cell would push other cells out of the way as it takes up more space.

I did see one other post on the forum saying that scaling the actors is not possible, but I'm wondering if there's any potential workarounds? I figured that spheres are a lot simpler than a detailed mesh, so it could be possible to achieve the same effect somehow through a force, constraint value, modifying blueprint, etc., but I'm not familiar enough with the plugin yet to know what to try.

Does anyone know how to achieve something like this, or have any ideas for things to try out? Or is this not possible? Thanks!

First, I want to use Obi particle as a way to shoot things > collect contacts > do gameplay things like apply damage.

But when I use the Obi Emitter, I see there is really heavy limitation.
It only has a speed value, albeit having a lot of shapes to spawn from, it still cannot do things like shoot a particle(s) with a target velocity.

The speed value tied to both spawn rate and particle speed.
That is: low speed value will spawn less particles, and the spawned particles also have less speed.
Big speed value will spawn more particles, and they fly with high speed.

This is not good, this leaves a hole where we want a low particle spawn rate, but travel at high-speed.

So can you consider add a scripting API that does Spawn(int count, float velocity);
Thank you!

Edit: Anyway, I think I should forgo this idea about using particle > collect contacts > do damage thing, this is better task for shuriken since it has no limit in collision size.
Obi particle can't have big size as I just tinker with the Granular blueprint, and found out that it can only go as far as max 1.

As shown in the video:
20 softbodies + pool = 5ms.
but 2 ropes + pool = 30ms 
So I think this is a bug.
package: https://drive.google.com/file/d/120oZvq9...sp=sharing
Note that I do not pack the [Graphy] into the package.
scene: Assets/Spike/Scenes/Test OBI.unity

This maybe because I enabled all the constraints there is in the solver, making the simulation more complex than needed.
I know there is a recommend on the website that you should disable all the constraints you don't use to save performance, but to make use of
all the Obi actors, let them interact with each other, shouldn't we have to have a Solver with all the constraints On?
I plan to make a game world with only one Solver, and as my Player run around, I'll add / remove actors into that one Solver as they go into near Player range.
Is this a good setup?
If there is more good practices to setup game world with Obi world, pls tell me, thanks!

Hi, pls take a look at this video



package: https://drive.google.com/file/d/1WNSuRz9...sp=sharing
In this you will find the scene: Assets/Spike/Scenes/Cut the Rope.unity
In the scene you will have the rope cutter object Rope Cutter with script RopeCutOnCollide.cs
and the masterSolver object with script ObiContactDebug.cs

First part of the video, everything is fine, the rope cutter can cut rope at exact element.
But when it hit the softbody ball, it also treated as hit the rope.

Hi, I'm very close to achieve greatness 
The target: I want just the positions that the ObiParticleRenderer script is getting to render those spheres.
If I go to the solver and get the positions, the result is all the positions of particle in the solver, including non-active particles.
Which explains the bad effect in the video, we have many particles that just lying around.

Unity 2022.3.16f1 URP14, VFX graphs + samples installed.
Script and scene in this package: https://drive.google.com/file/d/1mmDuFSi...sp=sharing
Scene: Assets/Spike/Scenes/FireBreath VFX and Fluid.unity
Script: ObiVFXRenderer.cs

The script will set positions buffer to VFX graph through GraphicsBuffer, since there is no computation here, so no ComputeShader is needed.
All it need is correct positions that are same as the ObiParticleRenderer is using to render the spheres.
If this is doable, then I can have fireBreath effect that can collide with environment and damage character using Obi collisions.
The fire effect should match the particle 100%, so I can't use advection.