I don't really need something like this for my project, but I've been following SIGGRAPH papers that deal with rope and cloth simulation and I think some of them managed to write their simulations such that, a knot for example, will never become untied by pulling on the two ends with any amount of force. Or if you tried to pull a cloth through another, it will never poke through.

Have you looked into any of these solutions? I'm guessing most of them are not realtime.

A method I had used to ensure tunnelling doesn't occur in some of my earlier simulation projects was fairly simple, though the content being simulated was also simple:

• A particle was in an 2D environment. In the environment were horizontal line segments that the particles would collide with.
  
• For simplicity, assume the particle and line segments have 0 radius.
  
• The space around a line segment was divided into 6 parts: above to the right, above, above to the left, below to the right, below, and below to the left. (I'll abbreviate these as AR, A, AL, BR, B, and BL.)
  
• If the particle passed through from one region to another suggesting a collision occurred, like A to B, it'd add a force that pushes the particle into region A (a point on the line segment).
  
• If, at the end of frame 1, after summing all forces acting on the particle still resulted in the particle being in region B, it'd remember that the particle is "supposed" to be in region A and continue pushing the particle into it on the next frame.
  
• If the particle passed through from, for example, AR to BR, the line segment would now remember that the particle switched from "supposed to be above" to "supposed to be below" and no longer try to push the particle above it.
  

Hi there, I am trying to grab my obi cloth in VR using steamVR. I tried attaching the cloth to the hand after any contact between the hand and any particle of the cloth using contact event handler and obi particle attachment but there is a huge gap between the hand and the particles attached. They’re attached correctly movement wise but they are not overlapping which makes it look weird. 
Thank you

Hello there,

Currently I am working on a game. In this game I have a rope and ball. Basically I want to do drag rope and push ball. But I've a problem with colliders I believe. When I added box collider it affects shape of my rope.



After I edited box collider I solved that problem but I want to push ball with Rope drag but also ball needs to follow rope when It dragged. But it stays on box collider and I cannot push up.

I dont know If I need to add something else or there are another ways to do it.

I was wondering if there was a way to show a trail renderer attached to the particles, either using Unity's built-in system or using something like Ara Trails?

Hello,

I am trying to set up a basic rope grabbing with a simple box collider. I added ObiContactGrabber to the box collider and a script RopeGrabber.cs which calls Grab() function. When the box collider is in contact with the particles it seems not working. What am I doing wrong ?

Here is the full sample project https://www.dropbox.com/s/a358ydt1gy2qk2...n.rar?dl=0

Thanks 
Eddy

Hello, let`s say there are A and B points between which i`m generating a rope. Then i want to add a 3rd C point and then move/repin constraint rope to new C point. Below steps:

1. spawn rope between A-B: two controll points and 2 pin constraints 
2. spawn new game object and adding on his transform new controll point using InsertControlPoint

Hi everyone,

I am trying to create a mobile game that involves having a net in which objects are placed inside. The net grows over the course of the game. The net also doesn't need to look super realistic or have a lot of density, but should sway a little bit and behave/look relatively satisfying/interesting.

I have been looking at Obi Cloth or Obi Rope to potentially implement this, as I am not getting far with the basic Unity toolset.

Is there any recommendations on what I should look at? Is what I am doing even possible with the current state of Unity and mobile hardware (especially in a way that it is performant on most devices)?

Appreciate any information - thanks!

We are using obi rope with the hope we will be able to tie knots for one of our projects.

Obi rope is working for most of what we need so far... However we have run into difficulty when trying to prevent knots from "slipping" through? 

Based on other forum posts on here you've suggested increasing resolution. Which still yields us the same results.


Any suggestions on other properties to try?


Please and thank you!

https://imgur.com/aFZnNee

https://imgur.com/Awos2Lp

Attached Files

Thumbnail(s)
           

Hi! 
I want to constantly changle length with cursor and adjust instances amount at runtime. But every time when I change instances amount, my rope teleports to some point and becomes straight, then cursor updates it and rope teleports back and becomes normal.
Is it a bug or setup issue or anything else?

Hi,



I'm working for a project that's trying to simulate a renaissance manuscript with interactive parchment pages. We're trying to build it for Oculus Quest 2 standalone.


I have the page set up and working well through Oculus Link, so plenty of CPU power, but when I try to build it to run on the quest alone, I only get about 10 frames per second.


I've been building this knowing there's a trade-off between processing power and stiffness, but I'm wondering if someone might know a way to optimize a cloth object while still keeping it stiff. Parchment is a really rigid material, and any time I try to decrease my settings, I get a rubbery sheet.


I'm attaching images of my settings below:


Obi solver:

and



Obi cloth object:




3D model:




Any help would be greatly appreciated!