(22-10-2020, 03:26 PM)josemendez Wrote: Hi,

"idToCollider" was removed in 5.0. See the manual for details on how to do this, and an example on how to retrieve the collider involved in a contact.
http://obi.virtualmethodstudio.com/tutorials/scriptingcollisions.html

(23-10-2020, 11:35 AM)dabinzzang Wrote: I followed the example, but It still doesn't notice a collision and I think It's counting the number of just particles coming out of the emitter. Another solution I have in mind is to lower the version of Obi Fluid, is there a way to lower the version of Obi Fluid?

(23-10-2020, 11:39 AM)josemendez Wrote: Works just fine for me, can you share the exact code you're using?

(23-10-2020, 11:53 AM)dabinzzang Wrote:

Code:

[RequireComponent(typeof(ObiSolver))]
public class CollisionEventHandler : MonoBehaviour
{

    ObiSolver solver;
    public int counter = 0;
    public Collider targetCollider = null;
    Obi.ObiSolver.ObiCollisionEventArgs collisionEvent;

    HashSet<int> particles = new HashSet<int>();

    void Awake()
    {
        solver = GetComponent<Obi.ObiSolver>();
    }

    void OnEnable()
    {
        solver.OnCollision += Solver_OnCollision;
    }

    void OnDisable()
    {
        solver.OnCollision -= Solver_OnCollision;
    }

    void Solver_OnCollision(object sender, Obi.ObiSolver.ObiCollisionEventArgs e)
    {
        HashSet<int> currentParticles = new HashSet<int>();

        var world = ObiColliderWorld.GetInstance();
        foreach (Oni.Contact contact in e.contacts)
        {
            // this one is an actual collision:
            if (contact.distance < 0.00001)
            {
                ObiColliderBase collider = world.colliderHandles[contact.other].owner;
                if (collider != null)
                {
                    currentParticles.Add(contact.particle);
                }
            }
        }

        Debug.Log(currentParticles.Count);
        particles.ExceptWith(currentParticles);
        counter += particles.Count;
        particles = currentParticles;
    }
}

Here you are. Thank you very much.

(23-10-2020, 12:10 PM)josemendez Wrote: What this does is it counts the amount of new particle hits any collider has experienced (cumulative over time), and stores that in the "counter" variable. Works perfectly fine. Note that the number logged to the console is the total amount of current contacts with *any* collider or trigger in the scene, the "targetCollider" variable is completely unused in the script.

What is it that you want to count?

(24-10-2020, 06:47 AM)dabinzzang Wrote: First of all, thank you very much for your quick and accurate response.

My problem is that the number of particles released from the emitter is counting from before they hit the ground(here ground is designed as targetcollider).
I want to know the number of water particles that hit the ground.

(24-10-2020, 06:47 AM)dabinzzang Wrote: and, i have a question, "the "targetCollider" variable is completely unused in the script." what does it mean?