90 lines
1.8 KiB
C#
90 lines
1.8 KiB
C#
#region Copyright & License Information
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/*
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* Copyright (c) The OpenRA Developers and Contributors
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System.Collections;
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using System.Collections.Generic;
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namespace OpenRA
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{
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public readonly struct MapCoordsRegion : IEnumerable<MPos>
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{
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public struct MapCoordsEnumerator : IEnumerator<MPos>
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{
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readonly MapCoordsRegion r;
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public MapCoordsEnumerator(MapCoordsRegion region)
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: this()
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{
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r = region;
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Reset();
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}
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public bool MoveNext()
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{
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var u = Current.U + 1;
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var v = Current.V;
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// Check for column overflow
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if (u > r.BottomRight.U)
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{
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v += 1;
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u = r.TopLeft.U;
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// Check for row overflow
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if (v > r.BottomRight.V)
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return false;
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}
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Current = new MPos(u, v);
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return true;
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}
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public void Reset()
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{
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Current = new MPos(r.TopLeft.U - 1, r.TopLeft.V);
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}
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public MPos Current { get; private set; }
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object IEnumerator.Current => Current;
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public void Dispose() { }
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}
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public MapCoordsRegion(MPos mapTopLeft, MPos mapBottomRight)
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{
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TopLeft = mapTopLeft;
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BottomRight = mapBottomRight;
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}
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public override string ToString()
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{
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return $"{TopLeft}->{BottomRight}";
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}
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public MapCoordsEnumerator GetEnumerator()
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{
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return new MapCoordsEnumerator(this);
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}
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IEnumerator<MPos> IEnumerable<MPos>.GetEnumerator()
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{
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return GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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public MPos TopLeft { get; }
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public MPos BottomRight { get; }
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}
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}
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