124 lines
3.2 KiB
C#
124 lines
3.2 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2019 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;
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using System.Collections.Generic;
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using OpenRA.Mods.Common.Activities;
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using OpenRA.Traits;
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namespace OpenRA.Mods.Common.Traits
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{
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[Desc("This unit can spawn and eject other actors while flying.")]
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public class ParaDropInfo : ITraitInfo, Requires<CargoInfo>
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{
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[Desc("Distance around the drop-point to unload troops.")]
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public readonly WDist DropRange = WDist.FromCells(4);
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[Desc("Wait at least this many ticks between each drop.")]
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public readonly int DropInterval = 5;
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[Desc("Sound to play when dropping.")]
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public readonly string ChuteSound = null;
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public object Create(ActorInitializer init) { return new ParaDrop(init.Self, this); }
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}
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public class ParaDrop : ITick, ISync, INotifyRemovedFromWorld
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{
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readonly ParaDropInfo info;
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readonly Actor self;
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readonly Cargo cargo;
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public event Action<Actor> OnRemovedFromWorld = self => { };
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public event Action<Actor> OnEnteredDropRange = self => { };
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public event Action<Actor> OnExitedDropRange = self => { };
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[Sync]
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bool inDropRange;
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[Sync]
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Target target;
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[Sync]
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int dropDelay;
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bool checkForSuitableCell;
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public ParaDrop(Actor self, ParaDropInfo info)
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{
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this.info = info;
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this.self = self;
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cargo = self.Trait<Cargo>();
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}
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public void SetLZ(CPos lz, bool checkLandingCell)
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{
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target = Target.FromCell(self.World, lz);
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checkForSuitableCell = checkLandingCell;
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}
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void ITick.Tick(Actor self)
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{
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if (dropDelay > 0)
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{
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dropDelay--;
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return;
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}
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var wasInDropRange = inDropRange;
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inDropRange = target.IsInRange(self.CenterPosition, info.DropRange);
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if (inDropRange && !wasInDropRange)
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OnEnteredDropRange(self);
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if (!inDropRange && wasInDropRange)
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OnExitedDropRange(self);
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// Are we able to drop the next trooper?
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if (!inDropRange || cargo.IsEmpty(self) || !self.World.Map.Contains(self.Location))
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return;
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var dropActor = cargo.Peek(self);
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var dropPositionable = dropActor.Trait<IPositionable>();
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var dropCell = self.Location;
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var dropSubCell = dropPositionable.GetAvailableSubCell(dropCell);
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if (dropSubCell == SubCell.Invalid)
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{
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if (checkForSuitableCell)
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return;
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dropSubCell = SubCell.Any;
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}
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// Unload here
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if (cargo.Unload(self) != dropActor)
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throw new InvalidOperationException("Peeked cargo was not unloaded!");
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self.World.AddFrameEndTask(w =>
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{
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dropPositionable.SetPosition(dropActor, dropCell, dropSubCell);
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var dropPosition = dropActor.CenterPosition + new WVec(0, 0, self.CenterPosition.Z - dropActor.CenterPosition.Z);
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dropPositionable.SetVisualPosition(dropActor, dropPosition);
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w.Add(dropActor);
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});
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Game.Sound.Play(SoundType.World, info.ChuteSound, self.CenterPosition);
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dropDelay = info.DropInterval;
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}
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void INotifyRemovedFromWorld.RemovedFromWorld(Actor self)
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{
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OnRemovedFromWorld(self);
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}
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}
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}
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