72 lines
1.6 KiB
C#
72 lines
1.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Numerics;
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using System.Text;
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namespace CommonUsage.Geometries
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{
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/// <summary>
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/// MDCS数学类：向量。
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/// </summary>
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public class Vectoriel
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{
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public Vectoriel()
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{
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_vec2 = Vector2.Zero;
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_dir2 = Vector2.Normalize(_vec2);
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_len = _vec2.Length();
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_angle = (float)(Math.Atan2(_vec2.Y, _vec2.X) / Math.PI * 180f);
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}
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public Vectoriel(Vector2 vec)
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{
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_vec2 = vec;
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_dir2 = Vector2.Normalize(_vec2);
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_len = _vec2.Length();
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_angle = (float)(Math.Atan2(_vec2.Y, _vec2.X) / Math.PI * 180f);
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}
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/// <summary>
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/// 通过笛卡尔坐标系X和Y值构建向量。
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/// </summary>
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/// <param name="x"></param>
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/// <param name="y"></param>
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/// <returns></returns>
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public static Vectoriel FromXY(float x, float y)
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{
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return new Vectoriel(new Vector2(x, y));
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}
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/// <summary>
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/// 通过极坐标系的角度和距离值构建向量。
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/// </summary>
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/// <param name="angle"></param>
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/// <param name="len"></param>
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/// <returns></returns>
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public static Vectoriel FromAngleLen(float angle, float len)
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{
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var rad = angle / 180f * Math.PI;
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return new Vectoriel(new Vector2((float)Math.Cos(rad), (float)Math.Sin(rad)) * len);
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}
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public static implicit operator Vector2(Vectoriel vec)
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{
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return vec._vec2;
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}
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public static explicit operator Vectoriel(Vector2 vec)
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{
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return FromXY(vec.X, vec.Y);
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}
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public Vector2 Direction => _dir2;
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public float Length => _len;
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public float Angle => _angle;
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private Vector2 _vec2, _dir2;
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private float _len, _angle;
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}
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}
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