C#对比两个坐标点是否相同的多种方法

bool ArePointsEqual(Point a, Point b)
{
    return a.X == b.X && a.Y == b.Y;
}

bool ArePointsEqual(Point a, Point b)
{
    return a.Equals(b);
}

bool ArePointsEqual(Point? a, Point? b)
{
    return object.Equals(a, b);
}

//1
bool ArePointsEqual(Point a, Point b)
{
    return (a.X, a.Y).Equals((b.X, b.Y));
}

//2
bool ArePointsEqual(Point a, Point b)
{
    var pointA = new { X = a.X, Y = a.Y };
    var pointB = new { X = b.X, Y = b.Y };
    return pointA.Equals(pointB);
}

using System.Linq;

Point[] points1 = { new Point(0, 0), new Point(1, 1), new Point(2, 2) };
Point[] points2 = { new Point(0, 0), new Point(1, 1), new Point(2, 2) };

bool areEqual = points1.SequenceEqual(points2);

public static bool PointsAreEqual(Point[] a, Point[] b)
{
    if (a == b) return true; // 引用相同
    if (a == null || b == null) return false;
    if (a.Length != b.Length) return false;

    for (int i = 0; i < a.Length; i++)
    {
        if (a[i].X != b[i].X || a[i].Y != b[i].Y) // 或者用 a[i].Equals(b[i])
            return false;
    }
    return true;
}

var sorted1 = points1.OrderBy(p => p.X).ThenBy(p => p.Y).ToArray();
var sorted2 = points2.OrderBy(p => p.X).ThenBy(p => p.Y).ToArray();

bool areEqual = sorted1.SequenceEqual(sorted2);

var set1 = new HashSet<Point>(points1);
var set2 = new HashSet<Point>(points2);

bool areEqual = set1.SetEquals(set2); // 集合内容相等（忽略顺序和重复）

public class PointFComparer : IEqualityComparer<PointF>
{
    private readonly float _epsilon;

    public PointFComparer(float epsilon = 0.001f)
    {
        _epsilon = epsilon;
    }

    public bool Equals(PointF a, PointF b)
    {
        return Math.Abs(a.X - b.X) < _epsilon &&
               Math.Abs(a.Y - b.Y) < _epsilon;
    }

    public int GetHashCode(PointF obj)
    {
        // 简单哈希，实际项目中可优化
        return HashCode.Combine(
            (int)(obj.X / _epsilon),
            (int)(obj.Y / _epsilon)
        );
    }
}

// 使用：
PointF[] arr1 = { new PointF(0.1f, 0.2f), new PointF(1.0f, 1.0f) };
PointF[] arr2 = { new PointF(0.1001f, 0.1999f), new PointF(1.0f, 1.0f) };

bool areEqual = arr1.SequenceEqual(arr2, new PointFComparer(0.01f));