105 lines
2.8 KiB
C#
105 lines
2.8 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 OpenRA.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("Actor will follow units until in range to attack them.")]
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public class AttackFollowInfo : AttackBaseInfo
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{
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public override object Create(ActorInitializer init) { return new AttackFollow(init.self, this); }
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}
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public class AttackFollow : AttackBase, ITick, ISync
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{
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public Target Target { get; protected set; }
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public AttackFollow(Actor self, AttackFollowInfo info)
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: base(self, info) { }
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protected override bool CanAttack(Actor self, Target target)
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{
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if (!target.IsValidFor(self))
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return false;
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return base.CanAttack(self, target);
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}
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public virtual void Tick(Actor self)
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{
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DoAttack(self, Target);
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IsAttacking = Target.IsValidFor(self);
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}
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public override Activity GetAttackActivity(Actor self, Target newTarget, bool allowMove)
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{
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return new AttackActivity(self, newTarget, allowMove);
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}
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public override void ResolveOrder(Actor self, Order order)
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{
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base.ResolveOrder(self, order);
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if (order.OrderString == "Stop")
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Target = Target.Invalid;
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}
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class AttackActivity : Activity
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{
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readonly AttackFollow attack;
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readonly IMove move;
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readonly Target target;
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public AttackActivity(Actor self, Target target, bool allowMove)
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{
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attack = self.Trait<AttackFollow>();
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move = allowMove ? self.TraitOrDefault<IMove>() : null;
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// HACK: Mobile.OnRails is horrible
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var mobile = move as Mobile;
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if (mobile != null && mobile.Info.OnRails)
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move = null;
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this.target = target;
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}
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public override Activity Tick(Actor self)
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{
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if (IsCanceled || !target.IsValidFor(self))
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return NextActivity;
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if (self.IsDisabled())
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return this;
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var weapon = attack.ChooseArmamentForTarget(target);
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if (weapon != null)
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{
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var targetIsMobile = (target.Type == TargetType.Actor && target.Actor.HasTrait<IMove>())
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|| (target.Type == TargetType.FrozenActor && target.FrozenActor.Info.Traits.Contains<IMove>());
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// Try and sit at least one cell closer than the max range to give some leeway if the target starts moving.
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var maxRange = targetIsMobile ? new WRange(Math.Max(weapon.Weapon.MinRange.Range, weapon.Weapon.Range.Range - 1024))
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: weapon.Weapon.Range;
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attack.Target = target;
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if (move != null)
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return Util.SequenceActivities(move.MoveFollow(self, target, weapon.Weapon.MinRange, maxRange), this);
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}
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return NextActivity;
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}
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}
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}
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}
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