62 lines
1.4 KiB
C#
62 lines
1.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using OpenRa.Game.Traits;
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namespace OpenRa.Game
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{
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class UnitInfluenceMap
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{
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Actor[,] influence = new Actor[128, 128];
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readonly int2 searchDistance = new int2(2,2);
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public UnitInfluenceMap()
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{
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Game.world.ActorRemoved += a => Remove(a.traits.GetOrDefault<Mobile>());
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}
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public void Tick()
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{
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var units = Game.world.Actors
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.Select( a => a.traits.GetOrDefault<Traits.Mobile>() ).Where( m => m != null );
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foreach (var u in units)
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Update(u);
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}
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public Actor GetUnitAt( int2 a )
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{
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var actor = influence[ a.X, a.Y ];
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if( actor != null && !actor.traits.Get<Mobile>().OccupiedCells().Contains( a ) )
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throw new InvalidOperationException( "UIM: Unit is not in influenced square" );
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return actor;
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}
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public void Add(Mobile a)
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{
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foreach (var c in a.OccupiedCells())
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influence[c.X, c.Y] = a.self;
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}
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public void Remove(Mobile a)
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{
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if (a == null) return;
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var min = int2.Max(new int2(0, 0), a.self.Location - searchDistance);
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var max = int2.Min(new int2(128, 128), a.self.Location + searchDistance);
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for (var j = min.Y; j <= max.Y; j++)
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for (var i = min.X; i <= max.X; i++)
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if (influence[i, j] == a.self)
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influence[i, j] = null;
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}
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public void Update(Mobile a)
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{
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Remove(a);
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if (!a.self.IsDead) Add(a);
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}
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}
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}
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