Hi all,

I'm new here (also new to Obi). I recently used ObiCloth for my VR project. I do have a few quick questions:

1. Does ObiCloth (or any other Obi) utilize multithreading? If so, could someone point me as to where it is implemented?
   
2. I'm thinking about getting Obi Fluid as well for my VR project, but before I do, has anyone tried using it for VR? Is it fast enough to be used (with minimal settings)?
   

Hi all

I've just bought Obi Fluid with the goal of adding fluid physics to my augmented reality projects. Running the test scenes as is, they work perfectly. But I've encountered problems on two different AR platforms:

1) ARCore

On ARCore, the beaker (water container) needs to be scaled down a lot for it to appear the correct scale in the real world. Using the emitter material resolution setting, I've also resized the particles for them to fit in the tiny beaker. After this, the particles simply explode. Upon reading the forums, I need to fix the physics settings such as viscosity, surface tension, cutoff distance, etc. Has anyone successfully found good settings for this?

2) Vuforia

On Vuforia, it's the opposite: I need to scale up the beaker several times for it to appear normal size in the real world. The physics seem to work fine by going up in scale. My problem here now is, the minimum emitter material resolution is 0.001, corresponding to a particle size of 1.0. This would mean I would need hundreds of thousands of particles. Any way I can bypass this minimum resolution?


Thanks in advance!

I have a problem where the rope hanging from the end of my crane swings like a penduluum, but I want it to have some stiffness so as you rotate the crane it doesnt sway so much.  The rope starts at the tip of the crane arm.

I'd like to put two verts close together right at the top of my rope, so I can enforce a low-bending cable running off the end of a crane (see picture).
Alternatively, having the ability to pin 'angle' and not just 'position' would work too. 

Anyways to accomplish this?

Thank you!

Hi!

I'm using Obi for a 3D grappling hook function (similar to you 2D example, but in 3D).

I have tweaked the values for the weight of my player rigidbody, for the rope and for the ObiSolver a lot, and I'm beginning to be pretty happy with the result. I still have one big problem:

If my player comes with some speed and shoots the rope in front of her, she still has some speed forward. This means she moves a bit while the rope is generated (whic takes around 3 frames on my computer). This I've tried to compensate for by creating a proportionally smaller rope. Also the rope is generated still (i.e. with no velocity), while she is in movement. The result is that the rope, when it appears, is formning a backward bend, behind her, and starts to slow her down from some kind of drag.

I first guessed this drag was because of some constraints, so I minimized bend constraint and increased "slack" to maximum. This made the rope a bit more "ugly", because it bent too much, but still no huge improvement. So I thought perhaps the player had too little mass to drag the rope. I increased the mass from 1 to 10, and it helped a bit, but instead the rope acted more elastic. Also, I want other objects to be much heavier than the player, so I don't like to have her too heavy. I changed that back, and came up with the idea, that perhaps I just need to set the particles start speed to the same as the player from the beginning! This way, they shouldn't drag behind her and slow her down.

The problem is that this seems to cause som unpredicted results. For one, the whole rope seemed to get a little bit crazy (but perhaps this is something I can tweak). But the other problem is that the fixed particle which keeps the far end of the rope in place, starts moving too. I read on this forum that this may be because even a particle with inverse mass 0 will move, if you set its velocity to some value. So I tried to exclude this particle, by getting the mass of all particles and avoid giving velocity to the one with inverseMass > 0.

Strangely, if I Debug.Log () all the particle masses I don't get any one with a different mass. They all have mass 10.

Hi, everyone. I create some obi ropes in my game, then I need select them by mouse click (Input.GetMouseButtonDown) in game window, such like using Physics.Raycast to know whether mouse click on the rope , however the conventional way does not work . Any one help to solve this problem? Thanks a lot.

Hi,

Obi Cloth is a great Package!
I have a simulation that i want to reset at runtime. How do i achieve that ?

yours Damir

If i change the simulation order off of Fixed Update it will snap properly but need it to interact with other physic objects properly.

Any advice?

Hello all.

I found the crash of Unity Editer.
My enviroment are follows.
Obi Cloth version is 3.3.1.
Unity version 2017.2.0f3.
PC OS is Windows10 64bit.

When I refer Mesh at OnPreRender() of Camera, this issue will happen.
Moreover error.log says "Unity.exe caused an Access Violation (0xc0000005)" & "Read from location 00000000 caused an access violation.".
My PC Memory has enough space.


The Simple way for Reproduction is follows.

Step1
Use Obi Cloth Sample Scene named "CharacterCloth.unity" in "Sample Scene" directory.

Step2
Attach the following Script into "Main Camera".

-MeshTest.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MeshTest : MonoBehaviour
{
    void OnPreRender()
    {
        MeshRenderer[] meshrenderers = Component.FindObjectsOfType<MeshRenderer>();
        SkinnedMeshRenderer[] skinnedMeshRenderers = Component.FindObjectsOfType<SkinnedMeshRenderer>();

        foreach (MeshRenderer r in meshrenderers)
        {
            Mesh m = r.GetComponent<MeshFilter>().sharedMesh;
        }
        foreach (SkinnedMeshRenderer r in skinnedMeshRenderers)
        {
            Mesh m = new Mesh();
            r.BakeMesh(m);
        }
    }
}

Step3
Click the Play Button.

Step4
Probably you can see the Crash of Unity Editer.

Does anyone know how can I fix this issue?

Attached Files

  MeshTest.cs (Size: 643 bytes / Downloads: 1)

I "stitch" newly created skinned models for my main character to an existing skeleton in my Unity project using a script. That is the only way I know how to attach a new model to my skeletaly animated character. Unfortunately adding Obi cloth to such models makes the plugin work with bugs: editing points gets bugged because the plugin thinks that the points are still located where the initial cloth GameObject was, assigning parameters to points is impossible and I am pretty sure self-collision with other skinned meshes on the recipient skeleton is not working either. I have created a Unity 2017.2 project with a scene that has everything set up for stitching a model to an existing skeleton, to stitch the model - just right click on a "Stitcher editor" script located on a "Shirt" GameObject in the "Bug scene" ("Scenes/Bug scene") and choose "Stitch skinned mesh".

Link to a screenshot:
http://piccy.info/view3/12327021/da782b2...7d9e60eb3/



Link to the project:

https://drive.google.com/open?id=178A31T...j7r--g8qNf


Please try it out and tell me if there is a workaround for such case.

P.S. Jesus guys this forum tech is a mess. I had to attach my file from the google drive and screenshots are impossible to embed. Such a shame to have such poor forum for a HQ product like Obi.

I can't for the life of me get my collision to work with my character. I have a cloak on the character that is using Obi Cloth. Collisions are enabled in my solver, my collider is on a seperate layer from my cloth, I have the correct layer selected in my solver for collisions. I need saving.