Collision Between 2 SoftBody - Printable Version

Collision Between 2 SoftBody - Printable Version

+- Obi Official Forum (https://obi.virtualmethodstudio.com/forum)
+-- Forum: Obi Users Category (https://obi.virtualmethodstudio.com/forum/forum-1.html)
+--- Forum: Obi Softbody (https://obi.virtualmethodstudio.com/forum/forum-12.html)
+--- Thread: Collision Between 2 SoftBody (/thread-3164.html)

Collision Between 2 SoftBody - dinhtai1104 - 04-11-2021

Hi devs, I've just implemented Obi Softbody plugin in game. And I don't know how to detect 2 softbody in scene (With others object is not softbody it's work perfect) here is my scripts for object softbody:

Code:
using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.UI;

using Obi;

public class BallObiCtr : MonoBehaviour

{

    public static int BallID = 0;

    private int ballID = 0;

    public ObiSolver obiSolver;

    private void Start()

    {

        ballID = BallID++;

        obiSolver.OnCollision += this.HandleCollisionCallback;

    }

    private void HandleCollisionCallback(ObiSolver solver, ObiSolver.ObiCollisionEventArgs e)

    {

        var world = ObiColliderWorld.GetInstance();

        foreach (Oni.Contact contact in e.contacts)

        {

            // look for actual contacts only:

            if (contact.distance < 0.01)

            {

                var col = world.colliderHandles[contact.bodyB].owner;

                if (col != null)

                {

                    Debug.Log(col.name);

                    if (col.gameObject.transform.CompareTag("Ball"))

                    {

                        Debug.Log("Callback collision ball!");

                    }

                }

            }

        }

    }

    private void OnDisable()

    {

        obiSolver.OnCollision -= this.HandleCollisionCallback;

    }

}

RE: Collision Between 2 SoftBody - josemendez - 04-11-2021

Hi,

Subscribe to OnParticleCollision instead of OnCollision. See the manual:
http://obi.virtualmethodstudio.com/manual/6.2/scriptingcollisions.html

Quote:To request the simplex-collider contact list from the solver, subscribe to its OnCollision event. To retrieve the simplex-simplex contact list, subscribe to its OnParticleCollision event.

RE: Collision Between 2 SoftBody - dinhtai1104 - 04-11-2021

(04-11-2021, 10:34 AM)josemendez Wrote: Hi,

Subscribe to OnParticleCollision instead of OnCollision. See the manual:
http://obi.virtualmethodstudio.com/manual/6.2/scriptingcollisions.html

Fast reply, thanks

(04-11-2021, 10:34 AM)josemendez Wrote: Hi,

Subscribe to OnParticleCollision instead of OnCollision. See the manual:
http://obi.virtualmethodstudio.com/manual/6.2/scriptingcollisions.html

Can you show me a sample about it, I change OnCollision to OnParticleCollision but it appears some error at line

Code:
var col = world.colliderHandles[contact.bodyB].owner;

Error is:

Quote:ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
System.ThrowHelper.ThrowArgumentOutOfRangeException (System.ExceptionArgument argument, System.ExceptionResource resource) (at <9577ac7a62ef43179789031239ba8798>:0)
System.ThrowHelper.ThrowArgumentOutOfRangeException () (at <9577ac7a62ef43179789031239ba8798>:0)
System.Collections.Generic.List`1[T].get_Item (System.Int32 index) (at <9577ac7a62ef43179789031239ba8798>:0)
BallObiCtr.HandleCollisionCallback (Obi.ObiSolver solver, Obi.ObiSolver+ObiCollisionEventArgs e) (at Assets/BallObiCtr.cs:29)
Obi.ObiSolver.EndStep (System.Single substepTime) (at Assets/Obi/Scripts/Common/Solver/ObiSolver.cs:1582)
Obi.ObiUpdater.EndStep (System.Single substepDeltaTime) (at Assets/Obi/Scripts/Common/Updaters/ObiUpdater.cs:92)
Obi.ObiFixedUpdater.FixedUpdate () (at Assets/Obi/Scripts/Common/Updaters/ObiFixedUpdater.cs:52)

RE: Collision Between 2 SoftBody - josemendez - 16-04-2025

(04-11-2021, 10:35 AM)dinhtai1104 Wrote: Fast reply, thanks

Can you show me a sample about it, I change OnCollision to OnParticleCollision but it appears some error at line

Code:
var col = world.colliderHandles[contact.bodyB].owner;
Error is:

Hi!

OnParticleCollision returns collisions between particles. You're trying to access the colliders array using the index of a simplex (which doesn't make sense) so you're getting an index out of range error since there's more simplices than colliders in the scene.

Instead, use solver.particleToActor to find the actor that the particle belongs to. See the manual for a detailed explanation and code examples:
https://obi.virtualmethodstudio.com/manual/7.0/scriptingcollisions.html

kind regards,