(06-06-2019, 12:00 PM)Smurfj3 Wrote: Hello, first off I want to say it's amazing asset, have messed around with it in the editor and everything worked as expected, however I have problems achieving the same on runtime.

I have checked the example code on 1 of your pages, but it seemed outdated. I have tried various things but can't seem to get it to work. I have tried the following code:

Code:

public class RopeGenerator : MonoBehaviour {

    private ObiRope rope;
    private ObiCurve path;
    private ObiSolver solver;
    private ObiRopeExtrudedRenderer ropeextruder;
    private ObiRopeCursor cursor;
    private MeshRenderer render;

    public Material RopeMaterial;

    public IEnumerator MakeRope(Transform fromtrans, Transform totrans, float ropeLength)
    {
        GameObject ropeObject = new GameObject("HitchRope", typeof(ObiSolver),
                                typeof(ObiRope),
                                typeof(ObiCurve),
                                typeof(ObiRopeExtrudedRenderer),
                                typeof(ObiRopeCursor));

        rope = ropeObject.GetComponent<ObiRope>();
        path = ropeObject.GetComponent<ObiCurve>();
        solver = ropeObject.GetComponent<ObiSolver>();
        ropeextruder = ropeObject.GetComponent<ObiRopeExtrudedRenderer>();
        cursor = ropeObject.GetComponent<ObiRopeCursor>();
        render = ropeObject.GetComponent<MeshRenderer>();

        rope.Solver = solver;
        rope.ropePath = path;
        ropeextruder.section = Resources.Load("DefaultRopeSection") as ObiRopeSection;

        render.material = RopeMaterial;
        
        ropeextruder.uvScale = new Vector2(1, 10);
       
        yield return rope.StartCoroutine(rope.GeneratePhysicRepresentationForMesh());

        cursor.ChangeLength(20);

        GameObject HandleObject01 = new GameObject("Obi Handle01", typeof(ObiParticleHandle));
        GameObject HandleObject02 = new GameObject("Obi Handle02", typeof(ObiParticleHandle));

        ObiParticleHandle handle01 = HandleObject01.GetComponent<ObiParticleHandle>();
        handle01.Actor = rope;
        handle01.AddParticle(0, fromtrans.position, Quaternion.identity, rope.invMasses[0], rope.invRotationalMasses[0]);
        handle01.AddParticle(1, fromtrans.position, Quaternion.identity, rope.invMasses[1], rope.invRotationalMasses[1]);  

        ObiParticleHandle handle02 = HandleObject02.GetComponent<ObiParticleHandle>();

        handle02.Actor = rope;
        int index = rope.UsedParticles - 1;
        handle02.AddParticle(index, totrans.position, Quaternion.identity, rope.invMasses[index], rope.invRotationalMasses[index]);
        handle02.AddParticle(index - 1, totrans.position, Quaternion.identity, rope.invMasses[index - 1], rope.invRotationalMasses[index - 1]);
        rope.AddToSolver(null);
    }
}

However I get an nullreferenceexception. that occurs in ObiRopeCursor.cs line 101.

The rope does appear in the scene tho. The effect I am going for is to generate a rope between 2 object where 1 of the objects could be both static or a moving object and the other object is always a moving object.

Help would be very much appreciated.

(06-06-2019, 04:34 PM)Smurfj3 Wrote: Awesome thanks for the quick reply and indeed got it all working now, is there a page that explains more about the Solver since I don't understand why it actually works now. I find the line 'rope.AddToSolver(null);' very confusing.

Quote:Now, the basic steps that take place when an ObiActor gets added to an ObiSolver are:

• ObiActor borrows a handful of particles from its ObiSolver, and sets their initial properties.
  
• ObiActor asks its ObiConstraints components to generate constraints of multiple kinds between these particles.
  
• In turn, each ObiConstraints component asks the ObiSolver to put these constraints in place
  

.

Quote:actor.Solver = solver;