112 lines
3.4 KiB
C#
112 lines
3.4 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2016 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.Linq;
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using OpenRA.Activities;
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using OpenRA.Mods.Common.Traits;
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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 HeliReturnToBase : Activity
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{
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readonly Aircraft heli;
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readonly bool alwaysLand;
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readonly bool abortOnResupply;
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Actor dest;
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public HeliReturnToBase(Actor self, bool abortOnResupply, Actor dest = null, bool alwaysLand = true)
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{
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heli = self.Trait<Aircraft>();
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this.alwaysLand = alwaysLand;
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this.abortOnResupply = abortOnResupply;
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this.dest = dest;
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}
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public Actor ChooseHelipad(Actor self)
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{
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var rearmBuildings = heli.Info.RearmBuildings;
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return self.World.Actors.Where(a => a.Owner == self.Owner).FirstOrDefault(
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a => rearmBuildings.Contains(a.Info.Name) && !Reservable.IsReserved(a));
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}
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public override Activity Tick(Actor self)
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{
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if (IsCanceled)
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return NextActivity;
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if (dest == null || Reservable.IsReserved(dest))
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dest = ChooseHelipad(self);
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var initialFacing = heli.Info.InitialFacing;
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if (dest == null)
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{
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var rearmBuildings = heli.Info.RearmBuildings;
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var nearestHpad = self.World.ActorsHavingTrait<Reservable>()
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.Where(a => a.Owner == self.Owner && rearmBuildings.Contains(a.Info.Name))
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.ClosestTo(self);
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if (nearestHpad == null)
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return ActivityUtils.SequenceActivities(new Turn(self, initialFacing), new HeliLand(self, true), NextActivity);
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else
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{
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var distanceFromHelipad = (nearestHpad.CenterPosition - self.CenterPosition).HorizontalLength;
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var distanceLength = heli.Info.WaitDistanceFromResupplyBase.Length;
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// If no pad is available, move near one and wait
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if (distanceFromHelipad > distanceLength)
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{
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var randomPosition = WVec.FromPDF(self.World.SharedRandom, 2) * distanceLength / 1024;
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var target = Target.FromPos(nearestHpad.CenterPosition + randomPosition);
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return ActivityUtils.SequenceActivities(new HeliFly(self, target, WDist.Zero, heli.Info.WaitDistanceFromResupplyBase), this);
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}
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return this;
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}
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}
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var exit = dest.Info.TraitInfos<ExitInfo>().FirstOrDefault();
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var offset = (exit != null) ? exit.SpawnOffset : WVec.Zero;
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if (ShouldLandAtBuilding(self, dest))
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{
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heli.MakeReservation(dest);
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return ActivityUtils.SequenceActivities(
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new HeliFly(self, Target.FromPos(dest.CenterPosition + offset)),
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new Turn(self, initialFacing),
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new HeliLand(self, false),
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new ResupplyAircraft(self),
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!abortOnResupply ? NextActivity : null);
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}
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return ActivityUtils.SequenceActivities(
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new HeliFly(self, Target.FromPos(dest.CenterPosition + offset)),
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NextActivity);
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}
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bool ShouldLandAtBuilding(Actor self, Actor dest)
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{
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if (alwaysLand)
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return true;
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if (heli.Info.RepairBuildings.Contains(dest.Info.Name) && self.GetDamageState() != DamageState.Undamaged)
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return true;
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return heli.Info.RearmBuildings.Contains(dest.Info.Name) && self.TraitsImplementing<AmmoPool>()
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.Any(p => !p.Info.SelfReloads && !p.FullAmmo());
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}
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}
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}
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