Unity3d ジェスチャー認識

patternTest

using UnityEngine;
using System.Collections.Generic;
using Leap;

public class patternTest_2 : MonoBehaviour {

    #region [Leap motion parameters]
    HandModel   handModel;
    Hand        leapHand;
    FingerModel indexFingerModel;
    #endregion

    #region [Public Parameters]
    public int      positionCacheNum = 180;    // 格納する最小点数（60 fps なら 180 で 3 sec 分保存）
    public Vector3  indexTip;
    public Vector3  thumbTip;
    #endregion

    #region [Velocity Parameters]
    public float velocity;  //velocity of the finger
    Vector3 currPosition;   //finger's current frame position
    Vector3 prePosition;    //finger's previous frame position
    #endregion

    #region [Private Parameters]
    private List<Vector3>   positions_              = new List<Vector3>();  //recording parameter
    private const float     THUMB_TRIGGER_DISTANCE  = 0.04f;                //Minimum distance to trigger the test
    private const float     MIN_CONFIDENCE          = 0.2f;                 //Minimum value of handmodel confidence
    #endregion

    // Update is called once per frame
    void Update () {
        //define LeapHands & Fingers
        handModel = GetComponent<HandModel> ();
        leapHand = handModel.GetLeapHand ();
        //get indexfinger
        indexFingerModel = handModel.fingers [1];
        //get indexfingerTip position
        indexTip = indexFingerModel.GetTipPosition ();  
        //get thumbTip position
        thumbTip = leapHand.Fingers [0].TipPosition.ToUnityScaled ();

        //calculating velocity of finger
        currPosition = thumbTip;
        velocity = (currPosition - prePosition).magnitude / Time.deltaTime;
        prePosition = thumbTip;

        //Trigger test (true: thumbTip got close to rest of fingers)
        bool patternTrigger = false;
        for (int i = 1; i<5 && !patternTrigger; ++i) {
            for(int j = 0; j<4 && !patternTrigger; ++j){
                Finger.FingerJoint joint = (Finger.FingerJoint)(j);
                Vector3 difference = leapHand.Fingers[i].JointPosition(joint).ToUnityScaled() - thumbTip;
                if(difference.magnitude < THUMB_TRIGGER_DISTANCE 
                   && leapHand.Confidence > MIN_CONFIDENCE){
                    //Trigger is ON
                    patternTrigger = true;
                }
            }
        }
        //Particle system On/Off
        switch (patternTrigger) {
        case(true): 
            //Start recording finger position
            AddPositionCache (indexTip);
            transform.FindChild("particle").gameObject.SetActive(true);
            break;
        case(false):
            transform.FindChild("particle").gameObject.SetActive(false);
            break;
        }

        if (DetectFingerGesture ()) {

            //Detected!
        }

    }

    //Add finger position
    void AddPositionCache(Vector3 position)
    {
        positions_.Insert(0, position);
        if (positions_.Count > positionCacheNum) {
            positions_.RemoveAt(positions_.Count - 1);
        }
    }

    //Detecting finger Gesture (Up||Down)
    bool DetectFingerGesture ()
    {
        var positionSum = Vector3.zero;

        for (int i = 0; i<positions_.Count; i++) {
            positionSum += positions_ [i];
            //Distance between First and Last Point
            float disBtwFirstLast = Vector3.Distance (positions_ [i], positions_ [0]);
            //X-coordinate distance change of the finger
            float xPositionCheck = Mathf.Abs (positions_ [i].x - positions_ [0].x);
            //Y-coordinate distance change of the finger
            float yPositionCheck = (positions_ [i].y - positions_ [0].y);

            //Gesture trigger checking point
            if (disBtwFirstLast > 3.0f && xPositionCheck < 0.05f && velocity>0.8f) {

                if (yPositionCheck > 0) {
                    //Downward Motion
                    Debug.Log ("Down Motion PASS");
                    Reset ();
                }else if (yPositionCheck < 0) {
                    //Upward Motion
                    Debug.Log ("Up Motion PASS");
                    Reset ();
                }
                return true;

            }
        }
        return false;
    }

    //Reseting position records
    void Reset ()
    {
        positions_.Clear();
    }
}

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pointerFollow

using UnityEngine;
using System.Collections;
using Leap;


public class mouseFollow : MonoBehaviour {

    void Start(){
        gameObject.SetActive (false);
    }

    // Update is called once per frame
    void Update () {
            transform.position = GetComponentInParent<patternTest> ().indexTip;
            transform.position = GetComponentInParent<patternTest_2> ().indexTip;

    }
}

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Youtube video: https://youtu.be/9jlVvRYOMvo