93 lines
2.2 KiB
C#
93 lines
2.2 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.Generic;
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using OpenRA.Traits;
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namespace OpenRA.Mods.Common.Traits
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{
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[TraitLocation(SystemActors.World)]
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[Desc("A dictionary of buildings placed on the map. Attach this to the world actor.")]
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public class BuildingInfluenceInfo : TraitInfo
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{
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public override object Create(ActorInitializer init) { return new BuildingInfluence(init.World); }
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}
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public class BuildingInfluence
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{
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class InfluenceNode
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{
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public InfluenceNode Next;
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public Actor Actor;
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}
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readonly Map map;
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readonly CellLayer<InfluenceNode> influence;
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public BuildingInfluence(World world)
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{
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map = world.Map;
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influence = new CellLayer<InfluenceNode>(map);
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}
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internal void AddInfluence(Actor a, IEnumerable<CPos> cells)
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{
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foreach (var c in cells)
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{
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var uv = c.ToMPos(map);
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if (influence.Contains(uv))
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influence[uv] = new InfluenceNode { Next = influence[uv], Actor = a };
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}
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}
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internal void RemoveInfluence(Actor a, IEnumerable<CPos> cells)
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{
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foreach (var c in cells)
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{
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var uv = c.ToMPos(map);
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if (!influence.Contains(uv))
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continue;
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influence[uv] = RemoveInfluenceInner(influence[uv], a);
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}
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}
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static InfluenceNode RemoveInfluenceInner(InfluenceNode influenceNode, Actor toRemove)
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{
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if (influenceNode == null)
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return null;
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influenceNode.Next = RemoveInfluenceInner(influenceNode.Next, toRemove);
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return influenceNode.Actor == toRemove ? influenceNode.Next : influenceNode;
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}
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public IEnumerable<Actor> GetBuildingsAt(CPos cell)
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{
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var uv = cell.ToMPos(map);
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if (!influence.Contains(uv))
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yield break;
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var node = influence[uv];
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while (node != null)
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{
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yield return node.Actor;
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node = node.Next;
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}
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}
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public bool AnyBuildingAt(CPos cell)
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{
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return influence.Contains(cell) && influence[cell] != null;
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}
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}
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}
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