using IStation.Epanet.Util;
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namespace IStation.Epanet.Network.Structures
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{
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///<summary>Simple 2d point.</summary>
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public struct EnPoint : IComparable<EnPoint>, IEquatable<EnPoint>
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{
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public static readonly EnPoint Invalid = new EnPoint(double.NaN, double.NaN);
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private readonly double _x;
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private readonly double _y;
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public EnPoint(double x, double y)
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{
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_x = x;
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_y = y;
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}
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public bool IsInvalid => double.IsNaN(_x) || double.IsNaN(_y);
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///<summary>Absciss coordinate.</summary>
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public double X => _x;
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///<summary>Ordinate coordinate.</summary>
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public double Y => _y;
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public double DistanceTo(EnPoint other)
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{
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double dx = _x - other._x;
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double dy = _y - other._y;
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return Math.Sqrt(dx * dx + dy * dy);
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}
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public int CompareTo(EnPoint other)
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{
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var cmp = _x.CompareTo(other._x);
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return cmp == 0 ? _y.CompareTo(other._y) : cmp;
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}
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public bool Equals(EnPoint other)
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{
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bool ex = _x.EqualsTo(other._x) || double.IsNaN(_x) && double.IsNaN(other._x);
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bool ey = _y.EqualsTo(other._y) || double.IsNaN(_y) && double.IsNaN(other._y);
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return ex && ey;
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}
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public override bool Equals(object obj)
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{
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return obj is EnPoint point && Equals(point);
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}
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public override int GetHashCode()
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{
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return _x.GetHashCode() ^ _y.GetHashCode();
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}
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public override string ToString()
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{
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return string.Format(nameof(EnPoint) + "{{x={0}, y={1}}}", _x, _y);
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}
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}
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}
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