110 lines
3.0 KiB
C#
110 lines
3.0 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
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* This file is part of OpenRA.
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*
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* OpenRA is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OpenRA is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OpenRA. If not, see <http://www.gnu.org/licenses/>.
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*/
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#endregion
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using System.Collections.Generic;
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using System.Linq;
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using OpenRA.FileFormats;
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using OpenRA.GameRules;
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namespace OpenRA.Traits
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{
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class ShroudInfo : ITraitInfo
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{
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public object Create(Actor self) { return new Shroud(self, this); }
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}
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class Shroud
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{
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Map map;
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int[,] visibleCells;
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bool[,] exploredCells;
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public Shroud(Actor self, ShroudInfo info)
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{
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map = self.World.Map;
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visibleCells = new int[map.MapSize, map.MapSize];
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exploredCells = new bool[map.MapSize, map.MapSize];
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self.World.ActorAdded += AddActor;
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self.World.ActorRemoved += RemoveActor;
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}
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// cache of positions that were added, so no matter what crazy trait code does, it
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// can't make us invalid.
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class ActorVisibility { public int range; public int2[] vis; }
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Dictionary<Actor, ActorVisibility> vis = new Dictionary<Actor, ActorVisibility>();
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void AddActor(Actor a)
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{
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if (a.Owner != a.Owner.World.LocalPlayer) return;
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var v = new ActorVisibility
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{
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range = a.Info.Traits.Get<OwnedActorInfo>().Sight,
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vis = GetVisOrigins(a).ToArray()
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};
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foreach (var p in v.vis)
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foreach (var q in a.World.FindTilesInCircle(p, v.range))
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{
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++visibleCells[q.X, q.Y];
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exploredCells[q.X, q.Y] = true;
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}
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vis[a] = v;
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}
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static IEnumerable<int2> GetVisOrigins(Actor a)
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{
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if (a.Info.Traits.Contains<BuildingInfo>())
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{
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var bi = a.Info.Traits.Get<BuildingInfo>();
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return Footprint.Tiles(a.Info.Name, bi, a.Location);
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}
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else
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{
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var mobile = a.traits.GetOrDefault<Mobile>();
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if (mobile != null)
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return new[] { mobile.fromCell, mobile.toCell };
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else
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return new[] { (1f / Game.CellSize * a.CenterLocation).ToInt2() };
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}
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}
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void RemoveActor(Actor a)
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{
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ActorVisibility v;
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if (!vis.TryGetValue(a, out v)) return;
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foreach (var p in v.vis)
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foreach (var q in a.World.FindTilesInCircle(p, v.range))
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--visibleCells[q.X, q.Y];
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vis.Remove(a);
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}
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public void UpdateActor(Actor a)
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{
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if (a.Owner != a.Owner.World.LocalPlayer) return;
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RemoveActor(a); AddActor(a);
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}
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}
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}
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