NewMagneticPinch.cs

using UnityEngine;
using System.Collections;
using Leap.Unity;

public class NewMagneticPinch : MonoBehaviour {

    public float forceSpringConstant;
    public float magnetDistance;
	// In the unity component pannel, link the hand you are using here
    public GameObject leapHand;

    protected bool pinching;
    protected bool startPinch;
    protected bool endPinch;
    protected Collider objectGrabbed;
	
	// Do not forget to add the Leap Motion Orion PinchDetector script to your hand
    protected PinchDetector pinchScript;

    protected Vector3 pinch_position;
    protected Vector3 new_position;

    void Start () {
        pinching = false;
        objectGrabbed = null;
        pinchScript = leapHand.GetComponent<PinchDetector>();
    }
	
	void Update () {
	// Gets the state of your pinch
        startPinch = pinchScript.DidStartPinch;
        endPinch = pinchScript.DidEndPinch;
        pinching = pinchScript.IsPinching;

        // Does something once the state of the pinch changes
        if (startPinch)
        {
            pinch_position = pinchScript.Position;
            OnStartPinch(pinch_position);
        }
        else if (endPinch) {
            OnRelease();
        }
            
        if (pinching && objectGrabbed != null)
        {
            pinch_position = pinchScript.Position;
            new_position = pinch_position - objectGrabbed.transform.position;
		// Any object that should be grabbed must include a Rigidbody
            Rigidbody objectRB = objectGrabbed.GetComponent<Rigidbody>();
            if (objectRB.isKinematic) objectRB.isKinematic = false;
            if (!objectRB.useGravity) objectRB.useGravity = true;
		// Accelerates grabbed object towards the pinch
            objectRB.AddForce(forceSpringConstant * new_position);
            objectGrabbed.transform.rotation = pinchScript.Rotation;
        }
    }

    /** Finds an object to grab and grabs it. */
    void OnStartPinch(Vector3 pinch_position)
    {

        // Checks if there is  objects around and grabs the closest one
        Collider[] close_things = Physics.OverlapSphere(pinch_position, magnetDistance);
        for (int j = 0; j < close_things.Length; ++j)
        {
            float distance = Vector3.Distance(pinch_position, close_things[j].transform.position);
            if (close_things[j].GetComponent<Rigidbody>() != null && distance < magnetDistance && !close_things[j].transform.IsChildOf(transform))
            {
                objectGrabbed = close_things[j];
            }
        }
    }

    void OnRelease()
    {
        objectGrabbed = null;
    }


}