114 lines
3.1 KiB
C#
114 lines
3.1 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2014 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. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using System.Linq;
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using OpenRA.GameRules;
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using OpenRA.Mods.RA.Move;
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using OpenRA.Mods.RA.Render;
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using OpenRA.Traits;
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namespace OpenRA.Mods.D2k
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{
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enum AttackState { Burrowed, EmergingAboveGround, ReturningUnderground }
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class SwallowActor : Activity
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{
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readonly Target target;
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readonly WeaponInfo weapon;
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readonly RenderUnit renderUnit;
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readonly AttackSwallow swallow;
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readonly IPositionable positionable;
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int countdown;
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AttackState stance;
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public SwallowActor(Actor self, Target target, WeaponInfo weapon)
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{
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this.target = target;
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this.weapon = weapon;
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positionable = self.TraitOrDefault<Mobile>();
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swallow = self.TraitOrDefault<AttackSwallow>();
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renderUnit = self.TraitOrDefault<RenderUnit>();
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countdown = swallow.AttackSwallowInfo.AttackTime;
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renderUnit.DefaultAnimation.ReplaceAnim("burrowed");
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stance = AttackState.Burrowed;
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}
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bool WormAttack(Actor worm)
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{
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var targetLocation = target.Actor.Location;
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var lunch = worm.World.ActorMap.GetUnitsAt(targetLocation)
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.Where(t => !t.Equals(worm) && weapon.IsValidAgainst(t, worm));
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if (!lunch.Any())
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return false;
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stance = AttackState.EmergingAboveGround;
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lunch.Do(t => t.World.AddFrameEndTask(_ => { t.World.Remove(t); t.Kill(t); })); // Dispose of the evidence (we don't want husks)
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positionable.SetPosition(worm, targetLocation);
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PlayAttackAnimation(worm);
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return true;
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}
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void PlayAttackAnimation(Actor self)
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{
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renderUnit.PlayCustomAnim(self, "sand");
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renderUnit.PlayCustomAnim(self, "mouth");
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}
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public override Activity Tick(Actor self)
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{
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if (countdown > 0)
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{
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countdown--;
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return this;
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}
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if (stance == AttackState.ReturningUnderground) // Wait for the worm to get back underground
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{
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if (self.World.SharedRandom.Next()%2 == 0) // There is a 50-50 chance that the worm would just go away
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{
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self.CancelActivity();
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self.World.AddFrameEndTask(w => w.Remove(self));
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var wormManager = self.World.WorldActor.TraitOrDefault<WormManager>();
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if (wormManager != null)
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wormManager.DecreaseWorms();
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}
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else
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{
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renderUnit.DefaultAnimation.ReplaceAnim("idle");
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}
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return NextActivity;
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}
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if (stance == AttackState.Burrowed) // Wait for the worm to get in position
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{
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// This is so that the worm cancels an attack against a target that has reached solid rock
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if (positionable == null || !positionable.CanEnterCell(target.Actor.Location, null, false))
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return NextActivity;
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var success = WormAttack(self);
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if (!success)
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return NextActivity;
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countdown = swallow.AttackSwallowInfo.ReturnTime;
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stance = AttackState.ReturningUnderground;
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}
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return this;
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}
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}
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}
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