手势插件引入暂存

Assets/TouchKit/TouchKitLite/TKLSwipeDetector.cs

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+using UnityEngine;
+using System.Collections.Generic;
+using System;
+
+
+namespace Prime31
+{
+
+public enum SwipeDirection
+{
+	Left = ( 1 << 0 ),
+	Right = ( 1 << 1 ),
+	Up = ( 1 << 2 ),
+	Down = ( 1 << 4 ),
+	Horizontal = ( Left | Right ),
+	Vertical = ( Up | Down ),
+	All = ( Horizontal | Vertical )
+}
+
+
+public class TKLSwipeDetector : MonoBehaviour
+{
+	public event Action<SwipeDirection> onSwipeDeteced;
+
+
+	public float timeToSwipe = 0.5f;
+	public float swipeVelocity;
+	SwipeDirection completedSwipeDirection;
+
+	public float _minimumDistance = 2f;
+	public float _allowedVariance = 1.5f;
+	public SwipeDirection _swipesToDetect = SwipeDirection.All;
+
+	// swipe state info
+	private Vector2 _startPoint;
+	private float _startTime;
+	private SwipeDirection _swipeDetectionState;
+	// the current swipes that are still possibly valid
+	bool _didCompleteDetection = true;
+
+
+	void Update()
+	{
+		// dont process drags if we have no input
+		if( TouchKitLite.instance.liveTouches.Count == 0 )
+			return;
+
+		var touch = TouchKitLite.instance.liveTouches[0];
+
+		// touch down, possible chance for a swipe
+		if( touch.phase == TouchPhase.Began )
+		{
+			_swipeDetectionState = _swipesToDetect;
+			_startPoint = touch.position;
+			_startTime = Time.time;
+			_didCompleteDetection = false;
+		}
+		else if( touch.phase == TouchPhase.Moved )
+		{
+			if( !_didCompleteDetection && checkForSwipeCompletion( touch ) )
+			{
+				_didCompleteDetection = true;
+				if( onSwipeDeteced != null )
+					onSwipeDeteced( completedSwipeDirection );
+			}
+		}
+	}
+
+
+	private bool checkForSwipeCompletion( TKLTouch touch )
+	{
+		// if we have a time stipulation and we exceeded it stop listening for swipes
+		if( timeToSwipe > 0.0f && ( Time.time - _startTime ) > timeToSwipe )
+		{
+			return false;
+		}
+
+
+		// when dealing with standalones (non touch-based devices) we need to be careful what we examaine
+		// we filter out all touches (mouse movements really) that didnt move
+		#if UNITY_EDITOR || UNITY_STANDALONE_OSX || UNITY_STANDALONE_WIN || UNITY_WEBPLAYER || UNITY_WEBGL
+		if( touch.deltaPosition.x != 0.0f || touch.deltaPosition.y != 0.0f )
+		{
+			#endif
+			// check the delta move positions.  We can rule out at least 2 directions
+			if( touch.deltaPosition.x > 0.0f )
+				_swipeDetectionState &= ~SwipeDirection.Left;
+			if( touch.deltaPosition.x < 0.0f )
+				_swipeDetectionState &= ~SwipeDirection.Right;
+
+			if( touch.deltaPosition.y < 0.0f )
+				_swipeDetectionState &= ~SwipeDirection.Up;			
+			if( touch.deltaPosition.y > 0.0f )
+				_swipeDetectionState &= ~SwipeDirection.Down;
+
+			#if UNITY_EDITOR || UNITY_STANDALONE_OSX || UNITY_STANDALONE_WIN || UNITY_WEBPLAYER || UNITY_WEBGL
+		}
+		#endif
+
+		//Debug.Log( string.Format( "swipeStatus: {0}", swipeDetectionState ) );
+
+		// Grab the total distance moved in both directions
+		var xDeltaAbsCm = Mathf.Abs( _startPoint.x - touch.position.x ) / TouchKitLite.instance.screenPixelsPerCm;
+		var yDeltaAbsCm = Mathf.Abs( _startPoint.y - touch.position.y ) / TouchKitLite.instance.screenPixelsPerCm;
+
+		// only check for swipes in directions that havent been ruled out yet
+		// left check
+		if( ( _swipeDetectionState & SwipeDirection.Left ) != 0 )
+		{
+			if( xDeltaAbsCm > _minimumDistance )
+			{
+				if( yDeltaAbsCm < _allowedVariance )
+				{
+					completedSwipeDirection = SwipeDirection.Left;
+					swipeVelocity = xDeltaAbsCm / ( Time.time - _startTime );
+					return true;
+				}
+
+				// We exceeded our variance so this swipe is no longer allowed
+				_swipeDetectionState &= ~SwipeDirection.Left;
+			}
+		}
+
+		// right check
+		if( ( _swipeDetectionState & SwipeDirection.Right ) != 0 )
+		{
+			if( xDeltaAbsCm > _minimumDistance )
+			{
+				if( yDeltaAbsCm < _allowedVariance )
+				{
+					completedSwipeDirection = SwipeDirection.Right;
+					swipeVelocity = xDeltaAbsCm / ( Time.time - _startTime );
+					return true;
+				}
+
+				// We exceeded our variance so this swipe is no longer allowed
+				_swipeDetectionState &= ~SwipeDirection.Right;
+			}
+		}
+
+		// up check
+		if( ( _swipeDetectionState & SwipeDirection.Up ) != 0 )
+		{
+			if( yDeltaAbsCm > _minimumDistance )
+			{
+				if( xDeltaAbsCm < _allowedVariance )
+				{
+					completedSwipeDirection = SwipeDirection.Up;
+					swipeVelocity = yDeltaAbsCm / ( Time.time - _startTime );
+					return true;
+				}
+
+				// We exceeded our variance so this swipe is no longer allowed
+				_swipeDetectionState &= ~SwipeDirection.Up;
+			}
+		}
+
+		// down check
+		if( ( _swipeDetectionState & SwipeDirection.Down ) != 0 )
+		{
+			if( yDeltaAbsCm > _minimumDistance )
+			{
+				if( xDeltaAbsCm < _allowedVariance )
+				{
+					completedSwipeDirection = SwipeDirection.Down;
+					swipeVelocity = yDeltaAbsCm / ( Time.time - _startTime );
+					return true;
+				}
+
+				// We exceeded our variance so this swipe is no longer allowed
+				_swipeDetectionState &= ~SwipeDirection.Down;
+			}
+		}
+
+		return false;
+	}
+}
+}