121 lines
3.9 KiB
C#
121 lines
3.9 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2015 The OpenRA Developers (see AUTHORS)
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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. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using Eluant;
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using Eluant.ObjectBinding;
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using OpenRA.Scripting;
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namespace OpenRA
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{
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public struct CPos : IScriptBindable, ILuaAdditionBinding, ILuaSubtractionBinding, ILuaEqualityBinding, ILuaTableBinding, IEquatable<CPos>
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{
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public readonly int X, Y;
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public CPos(int x, int y) { X = x; Y = y; }
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public static readonly CPos Zero = new CPos(0, 0);
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public static explicit operator CPos(int2 a) { return new CPos(a.X, a.Y); }
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public static CPos operator +(CVec a, CPos b) { return new CPos(a.X + b.X, a.Y + b.Y); }
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public static CPos operator +(CPos a, CVec b) { return new CPos(a.X + b.X, a.Y + b.Y); }
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public static CPos operator -(CPos a, CVec b) { return new CPos(a.X - b.X, a.Y - b.Y); }
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public static CVec operator -(CPos a, CPos b) { return new CVec(a.X - b.X, a.Y - b.Y); }
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public static bool operator ==(CPos me, CPos other) { return me.X == other.X && me.Y == other.Y; }
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public static bool operator !=(CPos me, CPos other) { return !(me == other); }
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public static CPos Max(CPos a, CPos b) { return new CPos(Math.Max(a.X, b.X), Math.Max(a.Y, b.Y)); }
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public static CPos Min(CPos a, CPos b) { return new CPos(Math.Min(a.X, b.X), Math.Min(a.Y, b.Y)); }
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public override int GetHashCode() { return X.GetHashCode() ^ Y.GetHashCode(); }
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public bool Equals(CPos other) { return X == other.X && Y == other.Y; }
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public override bool Equals(object obj) { return obj is CPos && Equals((CPos)obj); }
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public override string ToString() { return X + "," + Y; }
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public MPos ToMPos(Map map)
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{
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return ToMPos(map.TileShape);
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}
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public MPos ToMPos(TileShape shape)
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{
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if (shape == TileShape.Rectangle)
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return new MPos(X, Y);
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// Convert from diamond cell (x, y) position to rectangular map position (u, v)
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// - The staggered rows make this fiddly (hint: draw a diagram!)
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// (a) Consider the relationships:
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// - +1x (even -> odd) adds (0, 1) to (u, v)
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// - +1x (odd -> even) adds (1, 1) to (u, v)
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// - +1y (even -> odd) adds (-1, 1) to (u, v)
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// - +1y (odd -> even) adds (0, 1) to (u, v)
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// (b) Therefore:
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// - ax + by adds (a - b)/2 to u (only even increments count)
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// - ax + by adds a + b to v
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var u = (X - Y) / 2;
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var v = X + Y;
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return new MPos(u, v);
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}
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#region Scripting interface
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public LuaValue Add(LuaRuntime runtime, LuaValue left, LuaValue right)
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{
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CPos a;
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CVec b;
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if (!left.TryGetClrValue<CPos>(out a) || !right.TryGetClrValue<CVec>(out b))
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throw new LuaException("Attempted to call CPos.Add(CPos, CVec) with invalid arguments ({0}, {1})".F(left.WrappedClrType().Name, right.WrappedClrType().Name));
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return new LuaCustomClrObject(a + b);
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}
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public LuaValue Subtract(LuaRuntime runtime, LuaValue left, LuaValue right)
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{
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CPos a;
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CVec b;
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if (!left.TryGetClrValue<CPos>(out a) || !right.TryGetClrValue<CVec>(out b))
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throw new LuaException("Attempted to call CPos.Subtract(CPos, CVec) with invalid arguments ({0}, {1})".F(left.WrappedClrType().Name, right.WrappedClrType().Name));
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return new LuaCustomClrObject(a - b);
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}
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public LuaValue Equals(LuaRuntime runtime, LuaValue left, LuaValue right)
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{
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CPos a, b;
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if (!left.TryGetClrValue<CPos>(out a) || !right.TryGetClrValue<CPos>(out b))
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return false;
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return a == b;
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}
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public LuaValue this[LuaRuntime runtime, LuaValue key]
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{
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get
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{
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switch (key.ToString())
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{
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case "X": return X;
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case "Y": return Y;
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default: throw new LuaException("CPos does not define a member '{0}'".F(key));
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}
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}
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set
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{
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throw new LuaException("CPos is read-only. Use CPos.New to create a new value");
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}
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}
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#endregion
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}
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} |