I need to select specific regions in the OBI blueprint to run different cloth simulations, but using Unity’s built-in UI makes it challenging to isolate and configure those parts. Therefore, I would like to pre-select the points I need using tools like Vertex Groups and Vertex Paint in a 3D modeling program such as Blender, and then export this data via an FBX file. My goal is to select this data in the OBI blueprint in Unity. Could you provide a guide for this process?

hello

I'm writing to ask a question while using Obi.

I am testing dynamically dressing a pants object(Obi Skinned Cloth, Obi Skinned Cloth Renderer) on a mannequin object (Obi solver, Obi Fixed Updater, Obi Collider, Distance Field).

I was able to get the pants to initially fall down from the loaded height and stop at the pelvis to become clothed.

Is there any way to get the simulation of the pants' clothing to work without falling down from the initial height?

I tried using Unity Joints but it didn't work the way I wanted it to

I am a beginner in Unity and my English is not very good, so I apologize in advance for any lack of explanation.

Hello, I am running a simulation with a closed loop ObiRope, that should simulate an elastic.
The objective is to grasp the elastic with a tool and hook it on some nails, to create different shapes. The nails are vertical and the elastic should be stretched to be hooked to nails at 10 cm of distance between each other.
I am encountering an issue with the collision, because i am able to grasp and release the object with no issues, and i am able to hook the elastic on one nail, but the when i stretch the elastic and i hook it on another nail, after the release the collision is broken, either for both nails or just for the second one and the elastic passes through them.
I initially thought of increasing the contact.stickImpulse to make the interface between nail and internal part of the elastic more "unbreakable" but it didn't work because of course I can't change that value.
I don't know if inserting some type of attachment can be helpful because i need the elastic to slide over the nail if the movement requires it.
Do you have any suggestion to address this problem?

Hello! I'm currently trying to add particle attachment component through the script before obi skinnedcloth asset is enabled during play.
The issue that I'm struggling is if I add particle attachment into cloth asset during the play using my script(below), particle attachment doesnt work, just falls until it reaches at pelvis, 
but! if I add particle attachment into same cloth asset before play, particle attachment works well!

both of the cases particle attachment is added into cloth asset well, but the problem is particle attachment doesnt work only if I add it on the cloth asset(object that has obi skinnedcloth component) through the script

<add particle attachment component through inspector before play>
   

<add particle attachment during the play through script>
   

and this is the script I wrote. I tried same part on "OnEnable","Start","Awake" and all of this didnt work.
I tried to add particle attachment component on disabled cloth, then I enable cloth asset, it didnt work. 
Particle attachment worked only I added that component on cloth asset through inspector whether it was play runtime or not. 
 

Actors do not render when manually using Camera.Render() and rendering to a texture. Steps to reproduce: 

1. Create actor in scene and place camera.
2. Add RawImage to scene to show camera output
3. Disable camera component.
4. Create script

Dear Developers,

I hope this message finds you well. Recently, I have been thoroughly studying the articles on PBD simulations and came across an issue related to the rebound behavior of simulated particles, which I have illustrated in some images.https://www.bilibili.com/opus/975052950303932425

In the first scenario, which reflects real-world physics, when an object collides with a flat surface, the rebound is similar to specular reflection of light. In the second scenario, within PBD, when a high Maxdepenetration value is used, the particles tend to slide along the surface after the collision. In the third scenario, with a low Maxdepenetration value, the particles are ejected perpendicularly from the surface due to the depenetration velocity limitation.

I understand that this behavior is a result of how PBD calculates velocity based on position adjustment and the previous frame’s position. My question is: how can I achieve a rebound that mimics the real-world reflection angle after a collision? Could it be possible to apply impulses to the particles, similar to how Obi rigid body impulses are applied in fluid-solid coupling, to achieve this?

In my research, achieving this type of specular reflection upon collision is crucial, rather than having only the options of surface sliding or vertical rebound. Is there a feasible way to modify the Obi code to implement this?

Thank you very much for your time and assistance!

Best regards.

Hi, I have a need to handle tree like rope structure with multiple rigidbody attachments and I am confused how to. The setup looks something like this:



   

or like this:

   

multiple ropes connect to other ropes and rigidbodies. Obviously I have a mess with collisions. I tried to solve collision problems with categories, but I am confused a bit. Seems like I can't set different categories per group? Changing 1 group category, changes for the whole rope. So seems that I can't ignore collisions between attached groups, but collide with the rest of the rope? Seems that rigidbodies kind of work if I set the rigid body to collide with everything, and the rope group to ignore the rigid body (collision mask does work per particle group), but this trick does not work for rope to rope. Is there a way to solve this?

This component will create a particle for every bone down its hierarchy in a recursive fashion -starting from the bone transform it has been added to, which will be referred to as its [b]root bone[/b]-, and rig them up using constraints. The bone that's furthest away from the root bone (measuring distances from each bone to the next) is known as the [b]tip bone[/b].


Hello!

I'm experimenting with making a tree with obi bones. I want to put leaves as childs of some of the middle branches or main trunk, but they end up also 'rigged' as obi bones. I only want them as something visual.

Is there a way to 'tell' obi bone to not take some specific childs of the hierarchy and not rig them /ignore them?

Hi, I'm wondering if there is a way to get obi rope to work with terrain holes. I can't find any mention of it except one other forum post that alluded to support being planned for 2022. If there is still no support, is there any kind of workaround besides disabling the entire obi collider on the terrain?

What is an easy way to select the particles in the center of a sphere when creating a particle group?

There is the method of removing layers by optimizing but is there a better way? 
Something like being able to specify a position to expand a selection from.

If I am missing some major tools for the particle group selector, I would greatly appreciate any directions.