347 lines
11 KiB
C#
347 lines
11 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2015 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.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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using OpenRA.Activities;
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using OpenRA.Mods.Common.Warheads;
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using OpenRA.Traits;
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namespace OpenRA.Mods.Common.Traits
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{
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public abstract class AttackBaseInfo : UpgradableTraitInfo, ITraitInfo
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{
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[Desc("Armament names")]
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public readonly string[] Armaments = { "primary", "secondary" };
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public readonly string Cursor = null;
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public readonly string OutsideRangeCursor = null;
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[Desc("Does the attack type require the attacker to enter the target's cell?")]
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public readonly bool AttackRequiresEnteringCell = false;
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[Desc("Does not care about shroud or fog. Enables the actor to launch an attack against a target even if he has no visibility of it.")]
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public readonly bool IgnoresVisibility = false;
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[VoiceReference] public readonly string Voice = "Action";
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public override abstract object Create(ActorInitializer init);
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}
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public abstract class AttackBase : UpgradableTrait<AttackBaseInfo>, IIssueOrder, IResolveOrder, IOrderVoice, ISync
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{
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readonly string attackOrderName = "Attack";
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readonly string forceAttackOrderName = "ForceAttack";
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[Sync] public bool IsAttacking { get; internal set; }
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public IEnumerable<Armament> Armaments { get { return getArmaments(); } }
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protected Lazy<IFacing> facing;
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protected Lazy<Building> building;
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protected Lazy<IPositionable> positionable;
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protected Func<IEnumerable<Armament>> getArmaments;
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readonly Actor self;
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public AttackBase(Actor self, AttackBaseInfo info)
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: base(info)
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{
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this.self = self;
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var armaments = Exts.Lazy(() => self.TraitsImplementing<Armament>()
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.Where(a => info.Armaments.Contains(a.Info.Name)).ToArray());
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getArmaments = () => armaments.Value;
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facing = Exts.Lazy(() => self.TraitOrDefault<IFacing>());
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building = Exts.Lazy(() => self.TraitOrDefault<Building>());
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positionable = Exts.Lazy(() => self.Trait<IPositionable>());
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}
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protected virtual bool CanAttack(Actor self, Target target)
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{
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if (!self.IsInWorld || IsTraitDisabled)
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return false;
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if (!HasAnyValidWeapons(target))
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return false;
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// Building is under construction or is being sold
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if (building.Value != null && !building.Value.BuildComplete)
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return false;
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if (!target.IsValidFor(self))
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return false;
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if (Armaments.All(a => a.IsReloading))
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return false;
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if (self.IsDisabled())
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return false;
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return true;
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}
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public virtual void DoAttack(Actor self, Target target, IEnumerable<Armament> armaments = null)
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{
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if (armaments == null && !CanAttack(self, target))
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return;
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foreach (var a in armaments ?? Armaments)
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a.CheckFire(self, facing.Value, target);
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}
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public IEnumerable<IOrderTargeter> Orders
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{
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get
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{
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if (IsTraitDisabled)
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yield break;
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var armament = Armaments.FirstOrDefault(a => a.Weapon.Warheads.Any(w => (w is DamageWarhead)));
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if (armament == null)
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yield break;
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var negativeDamage = (armament.Weapon.Warheads.FirstOrDefault(w => (w is DamageWarhead)) as DamageWarhead).Damage < 0;
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yield return new AttackOrderTargeter(this, 6, negativeDamage);
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}
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}
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public Order IssueOrder(Actor self, IOrderTargeter order, Target target, bool queued)
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{
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if (order is AttackOrderTargeter)
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{
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switch (target.Type)
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{
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case TargetType.Actor:
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return new Order(order.OrderID, self, queued) { TargetActor = target.Actor };
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case TargetType.FrozenActor:
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return new Order(order.OrderID, self, queued) { ExtraData = target.FrozenActor.ID };
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case TargetType.Terrain:
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return new Order(order.OrderID, self, queued) { TargetLocation = self.World.Map.CellContaining(target.CenterPosition) };
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}
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}
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return null;
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}
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public virtual void ResolveOrder(Actor self, Order order)
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{
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var forceAttack = order.OrderString == forceAttackOrderName;
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if (forceAttack || order.OrderString == attackOrderName)
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{
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var target = self.ResolveFrozenActorOrder(order, Color.Red);
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if (!target.IsValidFor(self))
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return;
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self.SetTargetLine(target, Color.Red);
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AttackTarget(target, order.Queued, true, forceAttack);
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}
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}
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static Target TargetFromOrder(Actor self, Order order)
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{
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// Not targeting a frozen actor
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if (order.ExtraData == 0)
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return Target.FromOrder(self.World, order);
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// Targeted an actor under the fog
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var frozenLayer = self.Owner.PlayerActor.TraitOrDefault<FrozenActorLayer>();
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if (frozenLayer == null)
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return Target.Invalid;
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var frozen = frozenLayer.FromID(order.ExtraData);
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if (frozen == null)
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return Target.Invalid;
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// Target is still alive - resolve the real order
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if (frozen.Actor != null && frozen.Actor.IsInWorld)
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return Target.FromActor(frozen.Actor);
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return Target.Invalid;
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}
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public string VoicePhraseForOrder(Actor self, Order order)
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{
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return order.OrderString == attackOrderName || order.OrderString == forceAttackOrderName ? Info.Voice : null;
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}
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public abstract Activity GetAttackActivity(Actor self, Target newTarget, bool allowMove, bool forceAttack);
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public bool HasAnyValidWeapons(Target t)
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{
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if (IsTraitDisabled)
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return false;
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if (Info.AttackRequiresEnteringCell && !positionable.Value.CanEnterCell(t.Actor.Location, null, false))
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return false;
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return Armaments.Any(a => a.Weapon.IsValidAgainst(t, self.World, self));
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}
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public WDist GetMinimumRange()
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{
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if (IsTraitDisabled)
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return WDist.Zero;
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var min = Armaments.Where(a => !a.IsTraitDisabled)
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.Select(a => a.Weapon.MinRange)
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.Append(WDist.MaxValue).Min();
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return min != WDist.MaxValue ? min : WDist.Zero;
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}
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public WDist GetMaximumRange()
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{
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if (IsTraitDisabled)
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return WDist.Zero;
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return Armaments.Where(a => !a.IsTraitDisabled)
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.Select(a => a.MaxRange())
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.Append(WDist.Zero).Max();
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}
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// Enumerates all armaments, that this actor possesses, that can be used against Target t
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public IEnumerable<Armament> ChooseArmamentsForTarget(Target t, bool forceAttack, bool onlyEnabled = true)
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{
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// If force-fire is not used, and the target requires force-firing or the target is
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// terrain or invalid, no armaments can be used
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if (!forceAttack && (t.RequiresForceFire || t.Type == TargetType.Terrain || t.Type == TargetType.Invalid))
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return Enumerable.Empty<Armament>();
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// Get target's owner; in case of terrain or invalid target there will be no problems
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// with owner == null since forceFire will have to be true in this part of the method
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// (short-circuiting in the logical expression below)
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var owner = null as Player;
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if (t.Type == TargetType.FrozenActor)
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{
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owner = t.FrozenActor.Owner;
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}
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else if (t.Type == TargetType.Actor)
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{
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owner = t.Actor.EffectiveOwner != null && t.Actor.EffectiveOwner.Owner != null
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? t.Actor.EffectiveOwner.Owner
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: t.Actor.Owner;
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// Special cases for spies so we don't kill friendly disguised spies
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// and enable dogs to kill enemy disguised spies.
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if (self.Owner.Stances[t.Actor.Owner] == Stance.Ally || self.Info.HasTraitInfo<IgnoresDisguiseInfo>())
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owner = t.Actor.Owner;
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}
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return Armaments.Where(a => (!a.IsTraitDisabled || !onlyEnabled)
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&& a.Weapon.IsValidAgainst(t, self.World, self)
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&& (owner == null || (forceAttack ? a.Info.ForceTargetStances : a.Info.TargetStances)
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.HasStance(self.Owner.Stances[owner])));
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}
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public void AttackTarget(Target target, bool queued, bool allowMove, bool forceAttack = false)
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{
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if (self.IsDisabled() || IsTraitDisabled)
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return;
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if (!target.IsValidFor(self))
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return;
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if (!queued)
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self.CancelActivity();
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self.QueueActivity(GetAttackActivity(self, target, allowMove, forceAttack));
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}
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public bool IsReachableTarget(Target target, bool allowMove)
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{
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return HasAnyValidWeapons(target)
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&& (target.IsInRange(self.CenterPosition, GetMaximumRange()) || (allowMove && self.Info.HasTraitInfo<IMoveInfo>()));
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}
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class AttackOrderTargeter : IOrderTargeter
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{
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readonly AttackBase ab;
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public AttackOrderTargeter(AttackBase ab, int priority, bool negativeDamage)
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{
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this.ab = ab;
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this.OrderID = ab.attackOrderName;
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this.OrderPriority = priority;
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}
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public string OrderID { get; private set; }
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public int OrderPriority { get; private set; }
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public bool OverrideSelection { get { return true; } }
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bool CanTargetActor(Actor self, Target target, TargetModifiers modifiers, ref string cursor)
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{
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IsQueued = modifiers.HasModifier(TargetModifiers.ForceQueue);
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if (modifiers.HasModifier(TargetModifiers.ForceMove))
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return false;
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var forceAttack = modifiers.HasModifier(TargetModifiers.ForceAttack);
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var a = ab.ChooseArmamentsForTarget(target, forceAttack).FirstOrDefault();
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if (a == null)
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return false;
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cursor = !target.IsInRange(self.CenterPosition, a.MaxRange())
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? ab.Info.OutsideRangeCursor ?? a.Info.OutsideRangeCursor
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: ab.Info.Cursor ?? a.Info.Cursor;
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if (!forceAttack)
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return true;
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OrderID = ab.forceAttackOrderName;
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return true;
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}
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bool CanTargetLocation(Actor self, CPos location, List<Actor> actorsAtLocation, TargetModifiers modifiers, ref string cursor)
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{
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if (!self.World.Map.Contains(location))
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return false;
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IsQueued = modifiers.HasModifier(TargetModifiers.ForceQueue);
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// Targeting the terrain is only possible with force-attack modifier
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if (modifiers.HasModifier(TargetModifiers.ForceMove) || !modifiers.HasModifier(TargetModifiers.ForceAttack))
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return false;
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var target = Target.FromCell(self.World, location);
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var a = ab.ChooseArmamentsForTarget(target, true).FirstOrDefault();
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if (a == null)
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return false;
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cursor = !target.IsInRange(self.CenterPosition, a.MaxRange())
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? ab.Info.OutsideRangeCursor ?? a.Info.OutsideRangeCursor
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: ab.Info.Cursor ?? a.Info.Cursor;
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OrderID = ab.forceAttackOrderName;
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return true;
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}
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public bool CanTarget(Actor self, Target target, List<Actor> othersAtTarget, TargetModifiers modifiers, ref string cursor)
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{
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switch (target.Type)
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{
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case TargetType.Actor:
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case TargetType.FrozenActor:
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return CanTargetActor(self, target, modifiers, ref cursor);
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case TargetType.Terrain:
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return CanTargetLocation(self, self.World.Map.CellContaining(target.CenterPosition), othersAtTarget, modifiers, ref cursor);
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default:
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return false;
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}
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}
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public bool IsQueued { get; protected set; }
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}
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}
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}
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