unity 手指上下左右滑动的判定
可能游戏中需要进行手指滑动的判定，
例如，向左滑动，向上滑动，
最常见的就是跑酷游戏中的动作。
我写了一个简单的处理方式，跟大家分享一下。
using UnityEngine;
using System.Collections;
public class jarodInputController : MonoBehaviour {
private float fingerActionSensitivity = Screen.width * 0.05f; //手指动作的敏感度，这里设定为 二十分之一的屏幕宽度.
//
private float fingerBeginX;
private float fingerBeginY;
private float fingerCurrentX;
private float fingerCurrentY;
private float fingerSegmentX;
private float fingerSegmentY;
//
private int fingerTouchState;
//
private int FINGER_STATE_NULL = 0;
private int FINGER_STATE_TOUCH = 1;
private int FINGER_STATE_ADD = 2;
// Use this for initialization
void Start ()
{
fingerActionSensitivity = Screen.width * 0.05f;
fingerBeginX = 0;
fingerBeginY = 0;
fingerCurrentX = 0;
fingerCurrentY = 0;
fingerSegmentX = 0;
fingerSegmentY = 0;
fingerTouchState = FINGER_STATE_NULL;
}
// Update is called once per frame
void Update ()
{
if (Input.GetKeyDown (KeyCode.Mouse0))
{
if(fingerTouchState == FINGER_STATE_NULL)
{
fingerTouchState = FINGER_STATE_TOUCH;
fingerBeginX = Input.mousePosition.x;
fingerBeginY = Input.mousePosition.y;
}
}
if(fingerTouchState == FINGER_STATE_TOUCH)
{
fingerCurrentX = Input.mousePosition.x;
fingerCurrentY = Input.mousePosition.y;
fingerSegmentX = fingerCurrentX - fingerBeginX;
fingerSegmentY = fingerCurrentY - fingerBeginY;
}
if (fingerTouchState == FINGER_STATE_TOUCH)
{
float fingerDistance = fingerSegmentX*fingerSegmentX + fingerSegmentY*fingerSegmentY;
if (fingerDistance > (fingerActionSensitivity*fingerActionSensitivity))
{
toAddFingerAction();
}
}
if (Input.GetKeyUp(KeyCode.Mouse0))
{
fingerTouchState = FINGER_STATE_NULL;
}
}
private void toAddFingerAction()
{
fingerTouchState = FINGER_STATE_ADD;
if (Mathf.Abs (fingerSegmentX) > Mathf.Abs (fingerSegmentY))
{
fingerSegmentY = 0;
}
else
{
fingerSegmentX = 0;
}
if (fingerSegmentX == 0)
{
if (fingerSegmentY > 0)
{
Debug.Log ("up");
}
else {
Debug.Log ("down");
}
}
else if(fingerSegmentY == 0)
{
if(fingerSegmentX > 0)
{
Debug.Log ("right");
}
else
{
Debug.Log("left");
}
}
}
}
如果感觉还可以，那么就在打印语句的部分，替换成自己想要的具体代码，
可能这个响应是主动的，
也有可能这个响应是被动的，
主动和被动就好像是快递，
一种是快递把你买的东西送到你的公司，直接打电话给你，你到公司门口去取，
这种方式，就像是主动的。
一种是快递把你买的东西送到你的公司，交给前台，前台统一放到一个地方，
可能你中午吃饭的时候，会去看看有没有自己的快递，
这种方式，就像是被动的。
一种要求立刻响应，一种什么时候响应是你说了算。