61 lines
2.0 KiB
C#
61 lines
2.0 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2020 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, 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 System.Linq;
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using OpenRA.Primitives;
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using OpenRA.Traits;
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namespace OpenRA.Mods.Common.Activities
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{
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public class MoveWithinRange : MoveAdjacentTo
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{
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readonly WDist maxRange;
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readonly WDist minRange;
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public MoveWithinRange(Actor self, Target target, WDist minRange, WDist maxRange,
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WPos? initialTargetPosition = null, Color? targetLineColor = null)
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: base(self, target, initialTargetPosition, targetLineColor)
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{
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this.minRange = minRange;
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this.maxRange = maxRange;
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}
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protected override bool ShouldStop(Actor self)
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{
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// We are now in range. Don't move any further!
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// HACK: This works around the pathfinder not returning the shortest path
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return AtCorrectRange(self.CenterPosition) && Mobile.CanInteractWithGroundLayer(self) && Mobile.CanStayInCell(self.Location);
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}
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protected override bool ShouldRepath(Actor self, CPos targetLocation)
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{
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return lastVisibleTargetLocation != targetLocation && (!AtCorrectRange(self.CenterPosition)
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|| !Mobile.CanInteractWithGroundLayer(self) || !Mobile.CanStayInCell(self.Location));
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}
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protected override IEnumerable<CPos> CandidateMovementCells(Actor self)
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{
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var map = self.World.Map;
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var maxCells = (maxRange.Length + 1023) / 1024;
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var minCells = minRange.Length / 1024;
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return map.FindTilesInAnnulus(lastVisibleTargetLocation, minCells, maxCells)
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.Where(c => Mobile.CanStayInCell(c) && AtCorrectRange(map.CenterOfSubCell(c, Mobile.FromSubCell)));
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}
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bool AtCorrectRange(WPos origin)
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{
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return Target.IsInRange(origin, maxRange) && !Target.IsInRange(origin, minRange);
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}
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}
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}
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