Unity 判断鼠标上下左右拖动

Unity 判断鼠标上下左右拖动

public class Logic : MonoBehaviour
{
    private float StartMouseLocationX;
    private float StartMouseLocationY;
    private float EndMouseLocationX;
    private float EndMouseLocationY;

    #region 记录鼠标拖动开始位置
    private void OnMouseDown()
    {
        if (Input.GetMouseButtonDown(0))
        {
            StartMouseLocationX = Input.mousePosition.x;
            StartMouseLocationY = Input.mousePosition.y;
            //避免在拖动过程中产生的位置变化
            EndMouseLocationX = StartMouseLocationX;
            EndMouseLocationY = StartMouseLocationY;
        }
    }
    #endregion
    
    #region 记录鼠标拖动结束位置
    private void OnMouseUp()
    {
        if (Input.GetMouseButtonUp(0))
        {
            EndMouseLocationX = Input.mousePosition.x;
            EndMouseLocationY = Input.mousePosition.y;
        }

    }
    #endregion

    #region 判断鼠标是否进行了拖动
     private bool IfDrag()
    {
        if (MouseMoveDistitens(StartMouseLocationX, StartMouseLocationY, EndMouseLocationX, EndMouseLocationY) < 10)
        {
            return false;
        }
        else
        {
            return true;
        }
    }
    #endregion

    #region 计算鼠标移动距离
    private float MouseMoveDistitens(float Startx,float Starty,float Endx,float Endy)
    {
        return Mathf.Sqrt((Startx - Endx) * (Startx - Endx) + (Starty - Endy) * (Starty - Endy));
    }
    #endregion

    #region 判断鼠标拖动方向
    private string MoveDirection()
    {
        if (Mathf.Abs(EndMouseLocationX - StartMouseLocationX) > Mathf.Abs(EndMouseLocationY - StartMouseLocationY))//判断是左右移动还是上下移动
        {
            if (EndMouseLocationX - StartMouseLocationX > 0)//判断是向左还是向右
            {
                DataZeroing();//清空本次鼠标拖动产生的位置信息
                return "Right";
            }
            else
            {
                DataZeroing();
                return "Left";
            }
        }
        else
        {
            if (EndMouseLocationY - StartMouseLocationY > 0)//判断是向上还是向下
            {
                DataZeroing();
                return "Up";
            }
            else
            {
                DataZeroing();
                return "Down";
            }
        }
    }
        #endregion

    #region 数据归零
       private void DataZeroing()
        {
            StartMouseLocationX = 0;
            StartMouseLocationY = 0;
            EndMouseLocationX = 0;
            EndMouseLocationY = 0;
        }
        #endregion

    void Update()
    {
        if (IfDrag())
        {
            Debug.Log(MoveDirection());
        }
    }


}