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Stretching verts uniforml...
Forum: Obi Softbody
Last Post: josemendez
15-09-2025, 04:32 PM
» Replies: 1
» Views: 230

Scripting rod forces
Forum: Obi Rope
Last Post: chenji
11-09-2025, 01:15 PM
» Replies: 25
» Views: 3,170

Burst error causing crash...
Forum: Obi Rope
Last Post: josemendez
10-09-2025, 07:03 AM
» Replies: 1
» Views: 305

Controlling speed of emit...
Forum: Obi Fluid
Last Post: josemendez
06-09-2025, 06:29 AM
» Replies: 1
» Views: 587

Looks nice on editor but ...
Forum: Obi Fluid
Last Post: josemendez
04-09-2025, 07:20 AM
» Replies: 3
» Views: 827

How to Shorten or Scale t...
Forum: Obi Rope
Last Post: josemendez
02-09-2025, 09:53 AM
» Replies: 5
» Views: 887

The Limitation of Using O...
Forum: Obi Rope
Last Post: josemendez
01-09-2025, 10:30 PM
» Replies: 1
» Views: 615

Bug Where a Straight Segm...
Forum: Obi Rope
Last Post: josemendez
01-09-2025, 08:46 PM
» Replies: 1
» Views: 579

Having an issue with obi ...
Forum: Obi Rope
Last Post: Ben_bionic
29-08-2025, 04:23 PM
» Replies: 4
» Views: 1,082

Non-uniform particle dist...
Forum: Obi Rope
Last Post: chenji
29-08-2025, 09:05 AM
» Replies: 4
» Views: 927

Fixed timestep issue

Posted by: Elastic Sea - 18-02-2020, 08:50 PM - Forum: Obi Rope - Replies (2)

	When I make the fixed timestamp shorter the rope starts behaving erratically and moves faster and faster. Do I have to keep the timestamp on 0.02? Opening the sample scene with the crane can cause this, please take a look at this video https://imgur.com/a/cGSBigv Unity 2019.3.1f1 Obi Rope 5.1

Does Obi 4.1 have better performance than Obi 5.1?

Posted by: IlyaZzz - 18-02-2020, 04:31 PM - Forum: Obi Cloth - Replies (1)

	After I moved my project from Obi 4.1 to Obi 5.1 I noticed performance issues. So I made some performance tests with example scene "Benchmark" in Obi assets. I set up same settings ("Time" in project settings too) and I saw that Obi 4.1 is faster in 1.6-1.9 times than obi 5.1. Here are some photos: (Obi 5.1 / Obi 4.1 ) (Obi 5.1 / Obi 4.1 ) ( Obi 4.1 ) (Obi 5.1)

skinned cloth simulating doesn't work on Android devices

Posted by: guoli - 17-02-2020, 09:41 AM - Forum: Obi Cloth - Replies (4)

I watched this video https://www.youtube.com/watch?v=usXaFr6N630, and created a similar project that simulating a t-shirt using skinned cloth. It worked good on Android platform on my PC, but failed to run on a real android device. It seems that the skinned cloth component was deactivated on my android device for some reason.
I wonder if this feature is supported on android devices?

I am using Unity2019.2.21f1

How To Increase Particle Elevation?

Posted by: GrimCaplan - 17-02-2020, 07:36 AM - Forum: Obi Cloth - Replies (4)

I'm attempting to put together a simple script based off ObiParticlePicker that supports multiple touches. The multiple touches is working fine. The issue I'm having is that when I select a particle index, I do not seem to understand how to modify the particle's position.

I'm attempting to add a value to the y-level of a renderable position in order to increase its height. I know the axis in which I need to affect depends on the rotation and position of the cloth.

I have also done some debugging and confirmed that an index is in-fact being selected.

The reason for this is because I don't really want the effect that the particle dragger produces. When moving the finger around the screen it attempts to hold on to that particle even if I swipe to the other side of the screen whereas my desired functionality is the elevation and/or depression of particles under the finger. I know I could simply adapt the OnParticleDragged and treat all movement as a sequence of OnParticlePicked and then OnParticleReleased, but my goal is not just functioning but actually increasing my understanding of the system. I'll probably be using it a lot in the future. Directly effecting the elevation also seems less 'hackish' than hooking the two events in series.

Also if it would be helpful you can use the multi-touch for the "courtesy" code because that does actually work. I promise I'm not a terrible developer, Obi has just been hard for me to absorb.

Code:
using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using Obi;

public class SlimeSolverManager : MonoBehaviour

{

    [SerializeField]

    ObiSolver m_Solver;

    [SerializeField]

    float m_TouchRadius;

    [SerializeField]

    float m_TouchDistortionLevel = 1;

    private int[] m_PickedParticleIndices;

    private float pickedParticleDepth = 0;

    private void OnEnable()

    {

        Debug.Assert(m_Solver != null, "Slime Solver Manager Missing Obi Solver Component Reference!");

    }

    // Update is called once per frame

    void LateUpdate()

    {

        if (m_Solver)

        {

            if (Input.touchCount > 0)

                m_PickedParticleIndices = new int[Input.touchCount];

            foreach (Touch touch in Input.touches)

            {

                m_PickedParticleIndices[touch.fingerId] = -1;

                Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);

                float closestMu = float.MaxValue;

                float closestDistance = float.MaxValue;

                // Find the closest particle hit by the ray:

                for (int i = 0; i < m_Solver.renderablePositions.count; ++i)

                {

                    float mu;

                    Vector3 projected = ObiUtils.ProjectPointLine

                        (m_Solver.renderablePositions[i], ray.origin, ray.origin + ray.direction, out mu, false);

                    float distanceToRay = Vector3.SqrMagnitude

                        ((Vector3)m_Solver.renderablePositions[i] - projected);

                    mu = Mathf.Max(0, mu);

                    float radius = m_Solver.principalRadii[i][0] * m_TouchRadius;

                    if (distanceToRay <= radius * radius && distanceToRay < closestDistance && mu < closestMu)

                    {

                        closestMu = mu;

                        closestDistance = distanceToRay;

                        m_PickedParticleIndices[touch.fingerId] = i;

                    }

                }

                if (m_PickedParticleIndices[touch.fingerId] >= 0)

                {

                    pickedParticleDepth = Camera.main.transform.InverseTransformVector((Vector3)m_Solver.renderablePositions

                        [m_PickedParticleIndices[touch.fingerId]] - Camera.main.transform.position).z;

                    Vector3 worldPosition = Camera.main.ScreenToWorldPoint

                            (new Vector3(Input.mousePosition.x, Input.mousePosition.y, pickedParticleDepth));

                    float x = m_Solver.renderablePositions[m_PickedParticleIndices[touch.fingerId]].x;

                    float y = m_Solver.renderablePositions[m_PickedParticleIndices[touch.fingerId]].y;

                    float z = m_Solver.renderablePositions[m_PickedParticleIndices[touch.fingerId]].z;

                    float w = m_Solver.renderablePositions[m_PickedParticleIndices[touch.fingerId]].w;

                    m_Solver.renderablePositions

                        [m_PickedParticleIndices[touch.fingerId]] = 

                            new Vector4(x, y + m_TouchDistortionLevel, z, w);

                }

            }

        }

    }

}

I know the declaration of four floats is a little lazy but at this point I'm simply trying to get results. I'll opt later.

Just Curious...

Posted by: GrimCaplan - 16-02-2020, 10:57 PM - Forum: Obi Cloth - Replies (2)

	I was wondering what 'Mu' means in the ObiParticlePicker? Like not just its function, but what the 'm' and the 'u' actually stand for? Is it like measured unit or..?

Custom Rig and Skinning

Posted by: kleptine - 16-02-2020, 07:05 PM - Forum: Obi Softbody - Replies (1)

	I have a variety of very spindly objects (plants mostly), with premade skeletons and skinning weights. Is there any way to specify Obi Softbody to use a custom set of points/physical properties/shape-matching groups for an object? The built-in generator is fine for simple objects, but it really doesn't work well for thin stuff (because the shape matching binds shapes across nearby leaves).

How to write Obi Shader for LWRP?

Posted by: NoDeadLine - 16-02-2020, 10:42 AM - Forum: Obi Fluid - No Replies

	it works perfect on mobiles, but i want to add 2d lights (LWRP) for my environment, when i change pipeline to LWRP - obi fluid renderer just empty(only Foam generater works, it's 2d particles). Any suggestions please?

Need help constraining the cape to a location

Posted by: invayne - 15-02-2020, 07:48 PM - Forum: Obi Cloth - Replies (5)

	So I am trying to set constraints to my cape so that only a part of it simulates cloth is there a way to do this? below is a before and after. I only want the bottom half of my cape to simulate cloth.

Water Balloon War

Posted by: Showva - 14-02-2020, 06:17 PM - Forum: Obi Fluid - Replies (1)

First I'm sorry for my English. The google translator who translated this text for me.

Contextualizing: I am creating a game to learn to develop. and my project is a "water balloon war" game, where each player will have a number of water balloons and the goal is to see who "wets" the opponent the most.
Doubts:
1 - How do I leave the fluid with infinite life? Just leaving the lifespan with an absurd number?
2 - It is difficult to explain this doubt and perhaps it is something obvious to you, but for me it is a little confused. What is the best method of creating a prefab using water balloon containing OBI fluid?

Modifying Emitter

Posted by: ilterbilguven - 14-02-2020, 01:59 PM - Forum: Obi Fluid - Replies (2)

Hi,

Current emitter kills particles by lifespan. I want emitter to kill by position (For example, if a particle's Y position is below -5).

I managed to kill by that, but now emitter isn't working properly after when a particle is killed. How can I fix this?

Here's my CustomEmitter:

Code:
namespace Obi

{

   [AddComponentMenu("Physics/Obi/Obi Emitter", 850)]

   [ExecuteInEditMode]

   public class CustomObiEmitter : ObiActor

   {

      .

      .

      .

      [SerializeField] private float[] _posYs;

      public override void LoadBlueprint(ObiSolver solver)

      {

         .

         _posYs = new float[particleCount];

         for (var i = 0; i < _posYs.Length; ++i)

            _posYs[i] = 1;

         .

      }

      .

      .

      .

      protected override void SwapWithFirstInactiveParticle(int index)

      {

         .

         _posYs.Swap(index, activeParticleCount);

      }

      public bool EmitParticle(float offset, float deltaTime)

      {

         .

         _posYs[activeParticleCount] = 1;

         .

         .

         .

      }

      public override void BeginStep(float stepTime)

      {

         .

         .

         .

         for (int i = activeParticleCount - 1; i >= 0; --i)

         {

            _posYs[i] = m_Solver.positions[i].y;

            if (_posYs[i] <= -5)

            {

               KillParticle(i);

            }

         }

         .

         .

         .

      }

   }

}

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