CymbalSound.cs

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


public class CymbalSound : AbstractSound{

	public int Index_Now = 0;
	static readonly float FingerStrightState_Radian = Mathf.PI/12;//15度
	public bool isDown = false;//手掌是不是已经向下运动
	public Vector[] LeftPosition;//指尖位置
	public Vector[] LeftDirection;//指尖方向
	public Vector[] LeftRoot;//根骨位置
	public Vector[] PalmPosition;//手掌掌心位置以及上一帧手掌掌心位置
	public Vector PalmNormal;//手掌法向量
	public Vector PalmVelocity;//手掌运动方向
	public bool[] IsAllStraight = new bool[5];
	public bool isIndexStraight = false;
	public bool isMiddleStraight = false;
	bool isHandDown = false;
	bool isMoveDown = false;
	bool isMoveUp = false;

	public CymbalSound() {
		LeftPosition  = new Vector[5];
		LeftDirection  = new Vector[5];
		PalmPosition = new Vector[2];
		PalmNormal = new Vector (0, 0, 0);
		PalmVelocity = new Vector (0, 0, 0);
		LeftRoot = new Vector[5];
		for (int j = 0; j < 5; j++) {
			LeftPosition [j] = new Vector (0, 0, 0);
			LeftDirection [j] = new Vector (0, 0, 0);
			LeftRoot [j] = new Vector (0, 0, 0);
		}
		for (int i = 0; i < 2; i++) {
			PalmPosition [i] = new Vector (0, 0, 0);
		}
	}
	public void MakeAllZero(){
		PalmPosition[Index_Now] = Vector.Zero;
		PalmNormal = Vector.Zero;
		PalmVelocity = Vector.Zero;
		for (int j = 0; j < 5; j++) {
			LeftPosition [j] = Vector.Zero;
			LeftDirection [j] = Vector.Zero;
			LeftRoot [j] = Vector.Zero;
		}
	}
	public bool IsStraight(int i, float adjustBorder=0f)
	{
		bool isStraight =false;
		Vector Dir = LeftDirection [i];
		//如果指尖方向为0向量，表示无效的数据
		if (!Dir.Equals(Vector.Zero)) 
		{
			Vector fingerDir = LeftPosition [i] - LeftRoot [i];//指尖位置减去指根位置，由指根指向指尖的向量	        
			float radian = fingerDir.AngleTo(Dir);

			if (radian < FingerStrightState_Radian + adjustBorder)
			{
				isStraight = true;//表示是伸直的
			}
		}
		return isStraight;
	}
	public void SetData(Hand hand){//参数为右手
		foreach (Finger finger in hand.Fingers) {
			Finger.FingerType fingerType = finger.Type;
			switch (fingerType) {
			case Finger.FingerType.TYPE_INDEX://食指
				LeftPosition [0] = finger.TipPosition;
				LeftDirection [0] = finger.Direction;
				LeftRoot [0] = finger.Bone (Bone.BoneType.TYPE_METACARPAL).Center;
				break;
			case Finger.FingerType.TYPE_MIDDLE://中指
				LeftPosition [1] = finger.TipPosition;
				LeftDirection [1] = finger.Direction;
				LeftRoot [1] = finger.Bone (Bone.BoneType.TYPE_METACARPAL).Center;
				break;
			case Finger.FingerType.TYPE_PINKY://小指
				LeftPosition [2] = finger.TipPosition;
				LeftDirection [2] = finger.Direction;
				LeftRoot [2] = finger.Bone (Bone.BoneType.TYPE_METACARPAL).Center;
				break;
			case Finger.FingerType.TYPE_RING://无名指
				LeftPosition [3] = finger.TipPosition;
				LeftDirection [3] = finger.Direction;
				LeftRoot [3] = finger.Bone (Bone.BoneType.TYPE_METACARPAL).Center;
				break;
			case Finger.FingerType.TYPE_THUMB://大拇指
				LeftPosition [4] = finger.TipPosition;
				LeftDirection [4] = finger.Direction;
				LeftRoot [4] = finger.Bone (Bone.BoneType.TYPE_PROXIMAL).Center;
				break;
			default:
				break;
			}
		}
	}
	double CalDis(Vector v,Vector e){
		double temp0 = System.Math.Pow((double)v.x-(double)e.x,2.0);
		double temp1 = System.Math.Pow((double)v.y-(double)e.y,2.0);
		double temp2 = System.Math.Pow((double)v.z-(double)e.z,2.0);
		double res = System.Math.Sqrt (temp0 + temp1 + temp2);
		return res;
	}
	override public bool UpdateFrame (ref Frame frame) {
		bool isTrue = false;
		HandList hands = frame.Hands;
		int count = hands.Count;
		if (count == 0) {
			MakeAllZero ();
		} else if (count == 1) {
			if (hands [0].IsLeft) {//场景中有左手
				PalmPosition[Index_Now] = hands [0].PalmPosition;
				PalmNormal = hands [0].PalmNormal;
				PalmVelocity = hands [0].PalmVelocity;
				SetData (hands [0]);
			} else {
				MakeAllZero ();
			}
		} else {//有两只手
			Hand hand = null;
			if (hands [0].IsLeft) {
				hand = hands [0];
			} else {
				hand = hands [1];
			}//hand为右手
			PalmPosition[Index_Now] = hand.PalmPosition;
			PalmNormal = hand.PalmNormal;
			PalmVelocity = hand.PalmVelocity;
			SetData(hand);
		}
		//数据采集完毕
		//首先看手指是不是伸直的,中食指必须伸直并且伸直手指数大于等于3
		int Sum = 0;
		for (int i = 0; i < 5; i++) {
			IsAllStraight[i] = IsStraight (i);
			if (i == 0) {
				isIndexStraight = IsAllStraight [i];//食指是否伸直
			}
			if (i == 1) {
				isMiddleStraight = IsAllStraight [i];//中指
			}
			if (IsAllStraight [i] == true) {
				Sum = Sum + 1;//伸直手指总数
			}
		}
		//然后看手是不是向下的,如果手掌法向量与（0,-1,0）夹角小于10度则是向下
		float f = Mathf.PI/24;//15度
		if (!PalmNormal.Equals (Vector.Zero)) {
			float radian = PalmNormal.AngleTo (new Vector (0, -1, 0));
			if (radian < f) {
				isHandDown = true;
			}
		}

		//然后计算手掌当前运动方向与（0,-1,0）夹角，小于5度认为是向下运动
		/*	if (!PalmVelocity.Equals (Vector.Zero)) {
			float radian = PalmVelocity.AngleTo (new Vector (0, -1, 0));
			if (radian < f) {
				isMoveDown = true;
			}
		}

		if (!PalmVelocity.Equals (Vector.Zero)) {
			float radian = PalmVelocity.AngleTo (new Vector (0, 1, 0));
			if (radian < f) {
				isMoveUp = true;
			}
		}*/
		//还需要限制移动速度
		/*double Downgg =400.0;
		double Upgg = 300.0;
		double temp0 = System.Math.Pow((double)PalmVelocity.x,2.0);
		double temp1 = System.Math.Pow((double)PalmVelocity.y,2.0);
		double temp2 = System.Math.Pow((double)PalmVelocity.z,2.0);
		double res = System.Math.Sqrt (temp0 + temp1 + temp2); 
		//Debug.Log (res);
		Debug.Log("速度：");
		Debug.Log (PalmVelocity.Normalized);*/
		//不通过手掌速度判断了，而是通过两帧之间的不用，需要缓存上一帧的PalmPosition
		double dis = 0.0;
		dis = CalDis (PalmPosition[Index_Now],PalmPosition[(Index_Now+1)%2]);//移动距离
		Vector vec = PalmPosition[Index_Now] - PalmPosition[(Index_Now+1)%2];//移动向量
		if (!vec.Equals (Vector.Zero)) {
			float radian = vec.AngleTo (new Vector (0, -1, 0));
			if (radian < f) {
				isMoveDown = true;
			}
		}

		if (!vec.Equals (Vector.Zero)) {
			float radian = vec.AngleTo (new Vector (0, 1, 0));
			if (radian < f) {
				isMoveUp = true;
			}
		}

		if (isHandDown && isMoveDown && PalmPosition[Index_Now].y < PalmPosition[(Index_Now+1)%2].y - 5.0 && Sum >= 3 && isMiddleStraight && isIndexStraight && !isDown) {
			isDown = true;
			AudioClip Cymbal = GameObject.Find("Hand Controller").GetComponent<AC>().cymbal;
			Vector3 position = GameObject.Find ("Hand Controller").GetComponent<AC> ().position;
			AudioSource.PlayClipAtPoint (Cymbal,position);
			isTrue = true;
		}

		if (isHandDown  && isMoveUp && PalmPosition[Index_Now].y > PalmPosition[(Index_Now+1)%2].y + 5.0 && Sum >= 3 && isMiddleStraight && isIndexStraight && isDown) {
			isDown = false;
		}

		Index_Now = (Index_Now + 1) % 2;
		return isTrue;
	}
}