Obi Official Forum
Portal

Search Forums

(Advanced Search)

Latest Threads
Stretching verts uniforml...
Forum: Obi Softbody
Last Post: Aroosh
Yesterday, 05:32 AM
» Replies: 0
» Views: 68
Scripting rod forces
Forum: Obi Rope
Last Post: chenji
11-09-2025, 01:15 PM
» Replies: 25
» Views: 2,767
Burst error causing crash...
Forum: Obi Rope
Last Post: josemendez
10-09-2025, 07:03 AM
» Replies: 1
» Views: 185
Controlling speed of emit...
Forum: Obi Fluid
Last Post: josemendez
06-09-2025, 06:29 AM
» Replies: 1
» Views: 436
Looks nice on editor but ...
Forum: Obi Fluid
Last Post: josemendez
04-09-2025, 07:20 AM
» Replies: 3
» Views: 688
How to Shorten or Scale t...
Forum: Obi Rope
Last Post: josemendez
02-09-2025, 09:53 AM
» Replies: 5
» Views: 777
The Limitation of Using O...
Forum: Obi Rope
Last Post: josemendez
01-09-2025, 10:30 PM
» Replies: 1
» Views: 518
Bug Where a Straight Segm...
Forum: Obi Rope
Last Post: josemendez
01-09-2025, 08:46 PM
» Replies: 1
» Views: 491
Having an issue with obi ...
Forum: Obi Rope
Last Post: Ben_bionic
29-08-2025, 04:23 PM
» Replies: 4
» Views: 986
Non-uniform particle dist...
Forum: Obi Rope
Last Post: chenji
29-08-2025, 09:05 AM
» Replies: 4
» Views: 834

 
  Disable rope inside animation event callback
Posted by: jacob - 10-04-2022, 01:21 PM - Forum: Obi Rope - Replies (2)

Hi, I am trying to disable rope at runtime inside both animation event callback and statemachinebehavior, but when "ObiRope.ropeBlueprint = null" is executed, DestroyImmediate will be called inside BurstColliderWorld.cs, which is not allowed by unity, it will throw an error as follows:

Destroying GameObjects immediately is not permitted during physics trigger/contact, animation event callbacks or OnValidate. You must use Destroy instead.
UnityEngine.Object: DestroyImmediate (UnityEngine.Object)
Obi.BurstColliderWorld: DecreaseReferenceCount () (at Assets/Obi/Scripts/Common/Backends/Burst/Collisions/BurstColliderWorld.cs:61)
Obi.BurstSolverImpl: Destroy () (at Assets/Obi/Scripts/Common/Backends/Burst/Solver/BurstSolverImpl.cs:186)
Obi.BurstBackend: DestroySolver (Obi.ISolverImpl) (at Assets/Obi/Scripts/Common/Backends/Burst/BurstBackend.cs:21)
Obi.ObiSolver:Teardown () (at Assets/Obi/Scripts/Common/Solver/ObiSolver.cs:873)
Obi.ObiSolver:RemoveActor (Obi.ObiActor) (at Assets/Obi/Scripts/Common/Solver/ObiSolver.cs:1165)
Obi.ObiActor:RemoveFromSolver () (at Assets/Obi/Scripts/Common/Actors/ObiActor.cs:362)
Obi.ObiActor:OnDisable () (at Assets/Obi/Scripts/Common/Actors/ObiActor.cs:328)


I tested to change DestroyImmediate to Destroy, currently everything works fine, but I'm fully aware of it is always recommended to use Destroy over DestroyImmediate, so I'm wondering you are intentionally use DestroyImmediate to prevent some unwanted behaviors, if so, should I keep using DestroyImmediate? And what are the workarounds for this problem? (except move my code to coroutine, it has to be synchronized at exact time in order to achieve my expected behavior)

Print this item

Pregunta Should ObiAmbientForceZone take into account isVisible and simulateWhenInvisible?
Posted by: niuage - 08-04-2022, 10:06 PM - Forum: Obi Rope - Replies (1)

I was just wondering if ObiAmbientForceZone couldnt be improved to not do any computation for the solvers that have been marked as "dont simulate when not visible"?

Solver_OnStepBegin could exit early for instance.

I could certainly make the changes myself, but just wanted to see if that made sense.

Print this item

  Does ObiStitcher has scriptable API ?
Posted by: SimonFu - 07-04-2022, 04:40 PM - Forum: Obi Softbody - Replies (1)

Recently, I tried Obistitcher, which perfectly matches my need.
However, I found that ObiStitcher can only support point-wise stitching, which is rather inconvenient.
So I want to ask whether ObiStitcher has some batch-process methods or API, or something like `group` in Obi Blueprint.
Hope to hear your reply soon~

Print this item

  Obi dragger in VR
Posted by: Darvy96 - 07-04-2022, 08:03 AM - Forum: Obi Cloth - Replies (1)

Hi, 

I'm developing a game with Obi Cloth for VR and i have a doubt. Is it possible to grab the clothes so that the user can bring them closer and further away from himself? in other words, can it move in Unity's z-axis?

Thanks.

Print this item

Pregunta How to create a tinsel?
Posted by: niuage - 06-04-2022, 02:03 PM - Forum: Obi Rope - Replies (2)

Hi,

I'm probably missing something obvious, but just reading the doc, I can't figure out how to make something similar to a tinsel.

Right now I have a rope attached to 2 points, so far so good, but how can I attach objects to the rope such as they follow it without influencing it, or very little?

Thanks for any pointers.


[Image: JePHV2g.png]

Print this item

  Rope created at runtime is longer than the distance between the two connection points
Posted by: NailEngine - 05-04-2022, 10:38 PM - Forum: Obi Rope - Replies (4)

[Image: img.png]

Code:
            const string STAND_PARTICLE_GROUP = "PointOnStand";
            const string TARGET_PARTICLE_GROUP = "PointOnTarget";

            int standFilter = Obi.ObiUtils.MakeFilter(Obi.ObiUtils.CollideWithEverything, 0);
            int targetFilter = Obi.ObiUtils.MakeFilter(Obi.ObiUtils.CollideWithNothing, 0);

            var localHit = pointOnStand.transform.InverseTransformPoint(pointOnTarget.position);

            var blueprint = ScriptableObject.CreateInstance<Obi.ObiRopeBlueprint>();
            blueprint.resolution = 0.5f;

            blueprint.path.Clear();
            blueprint.path.AddControlPoint(Vector3.zero, -localHit.normalized, localHit.normalized, Vector3.up, 0.1f, 0.1f, thickness, standFilter, UnityEngine.Color.white, STAND_PARTICLE_GROUP);
            blueprint.path.AddControlPoint(localHit, -localHit.normalized, localHit.normalized, Vector3.up, 0.1f, 0.1f, thickness, targetFilter, UnityEngine.Color.white, TARGET_PARTICLE_GROUP);
            blueprint.path.FlushEvents();

            var generate = blueprint.Generate();
            while (generate.MoveNext()) ;

            var ropeGameObject = new GameObject("Rope",
                typeof(Obi.ObiRope),
                typeof(Obi.ObiPathSmoother),
                typeof(Obi.ObiRopeChainRenderer));

            ropeGameObject.transform.SetParent(solver.transform);

            var ropeChainRenderer = ropeGameObject.GetComponent<Obi.ObiRopeChainRenderer>();
            ropeChainRenderer.linkPrefabs.Add(chainPrefab);
            ropeChainRenderer.sectionTwist = 90;
            ropeChainRenderer.linkScale = Vector3.one;

            var rope = ropeGameObject.GetComponent<Obi.ObiRope>();
            rope.ropeBlueprint = blueprint;

            if (!standEntity.ObiStandColliders.TryGetValue(pointOnStand, out var standObiColliderGO))
            {
                standObiColliderGO = GameObjectPool.For(m_StandObiColliderPrefab).Rent();
                standObiColliderGO.transform.SetParent(pointOnStand.parent);
                standObiColliderGO.transform.localScale = Vector3.one * 0.005f;
                standEntity.ObiStandColliders[pointOnStand] = standObiColliderGO;
            }

            standObiColliderGO.transform.position = pointOnStand.position;
            standObiColliderGO.transform.rotation = pointOnStand.rotation;
            standObiColliderGO.transform.localScale = pointOnStand.localScale;

            var standObiCollider = standObiColliderGO.GetComponent<Obi.ObiColliderBase>();

            var pinConstraints = rope.GetConstraintsByType(Oni.ConstraintType.Pin) as Obi.ObiConstraints<Obi.ObiPinConstraintsBatch>;
            pinConstraints.Clear();
            var batch = new Obi.ObiPinConstraintsBatch();
            batch.AddConstraint(rope.solverIndices[0], standObiCollider, Vector3.zero, Quaternion.identity, 0, 0, float.PositiveInfinity);
            batch.AddConstraint(
                rope.solverIndices[blueprint.activeParticleCount - 1],
                target.GetComponent<Obi.ObiColliderBase>(),
                target.InverseTransformPoint(pointOnTarget.position),
                Quaternion.identity,
                0,
                0,
                float.PositiveInfinity);
            batch.activeConstraintCount = 2;
            pinConstraints.AddBatch(batch);
            rope.SetConstraintsDirty(Oni.ConstraintType.Pin);

I'm basically trying to create a chain between these two objects at runtime. The length of the chain should be the distance between those two red X's which mark "mount points" to create the chain between. The circle object isn't "hanging" down because I currently have the rigidbody set to kinematic.

Any ideas?

Print this item

Pregunta Rope won't hang straight
Posted by: goldfire - 05-04-2022, 07:01 PM - Forum: Obi Rope - Replies (5)

I can't seem to get this rope with an object at the end to hang straight. I've been tinkering with all of the settings for quite a while and nothing seems to help, but I assume I'm missing something obvious.

Here's what the rope looks like after entering play mode:

[Image: 8w4lvjW.png]

Here's the rope settings:

[Image: qaOHj22.png]

Here's the solver settings:

[Image: IyfrbNo.png]

PS: The last update to Obi Rope has been fantastic for productivity with enabling support for enter play mode settings. Thanks for the hard work on that, it is much appreciated!

Print this item

  Freeze softbody in certain axis
Posted by: jaysama - 04-04-2022, 11:00 AM - Forum: Obi Softbody - Replies (3)

Hi Obi devs,

I want to have my softbody to fall to the ground with a fixed position, yet it moved a bit on X and Z axis.
Is there a way to freeze a softbody position in certain axis (X and Z) like in Unity's rigidbody setting?

Also how can I make all the softbodies to not interact with each other?
I figured out that I can use 1 solver for 1 softbody, but it'll bloat my scene with solvers, so is there any other way?

Thanks in advance!

Print this item

  Rope dynamic color change
Posted by: bubbbles - 04-04-2022, 08:35 AM - Forum: Obi Rope - Replies (2)

Hello,

Can some please help me how I would dynamically change the color of a rope like this video?

https://drive.google.com/drive/folders/1...sp=sharing

Thanks in advance

Print this item

  particle like obiactor
Posted by: maygdirf - 01-04-2022, 04:09 PM - Forum: Obi Cloth - Replies (5)

Hi again!

I was wondering if it's possible to treat each particle of a ObiCloth like a ObiActor, so move them in a desired position for example. In particular, I would like doing a suturing task like the medical procedure in which the two parts of a wound have to enlace using a rope. Thanks in advice.

Print this item