using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RichCreator.Utility.Structs
{
    /// <summary>
    /// 点
    /// </summary>
    public class ZTPoint 
    {
        public static ZTPoint Empty = new ZTPoint(0,0);

        public ZTPoint()
        {

        }
        public ZTPoint(Int32 x, Int32 y)
        {
            this.X = x;
            this.Y = y;
        }

        
        public Int32 X { get; set; }

        public Int32 Y { get; set; }
        
        public static ZTPoint operator +(ZTPoint a, ZTPoint b)
        {
            return new ZTPoint(a.X + b.X, a.Y + b.Y);
        }

        public static ZTPoint operator -(ZTPoint a, ZTPoint b)
        {
            return new ZTPoint(a.X - b.X, a.Y - b.Y);
        }

        public override string ToString()
        {
            return "(" + this.X.ToString() + "," + this.Y.ToString() + ")";
        }

        /// <summary>
        /// x,y坐标加上指定的值
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        public ZTPoint Add(Int32 val)
        {
            return new ZTPoint(this.X + val, this.Y + val);
        }

        /// <summary>
        /// 两个坐标相加
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        public ZTPoint Add(ZTPoint val)
        {
            return new ZTPoint(this.X + val.X, this.Y + val.Y);
        }

        /// <summary>
        /// 两个坐标相减
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        public ZTPoint Sub(ZTPoint val)
        {
            return new ZTPoint(this.X - val.X, this.Y - val.Y);
        }

        #region IEquatable
        public bool Equals(ZTPoint other)
        {
            if (other == null)
            {
                return false;
            }
            if (this.X == other.X && this.Y == other.Y)
            {
                return true;
            }
            return false;
        }
        #endregion
    }
}