112 lines
3.4 KiB
C#
112 lines
3.4 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007-2018 The OpenRA Developers (see AUTHORS)
|
|
* This file is part of OpenRA, which is free software. It is made
|
|
* available to you under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version. For more
|
|
* information, see COPYING.
|
|
*/
|
|
#endregion
|
|
|
|
using System.Drawing;
|
|
using System.Linq;
|
|
using OpenRA.Activities;
|
|
using OpenRA.Mods.Common.Traits;
|
|
using OpenRA.Traits;
|
|
|
|
namespace OpenRA.Mods.Common.Activities
|
|
{
|
|
public class HeliAttack : Activity
|
|
{
|
|
readonly Aircraft aircraft;
|
|
readonly AttackHeli attackHeli;
|
|
readonly bool attackOnlyVisibleTargets;
|
|
readonly Rearmable rearmable;
|
|
|
|
Target target;
|
|
bool canHideUnderFog;
|
|
protected Target Target
|
|
{
|
|
get
|
|
{
|
|
return target;
|
|
}
|
|
|
|
private set
|
|
{
|
|
target = value;
|
|
if (target.Type == TargetType.Actor)
|
|
canHideUnderFog = target.Actor.Info.HasTraitInfo<HiddenUnderFogInfo>();
|
|
}
|
|
}
|
|
|
|
public HeliAttack(Actor self, Target target, bool attackOnlyVisibleTargets = true)
|
|
{
|
|
Target = target;
|
|
aircraft = self.Trait<Aircraft>();
|
|
attackHeli = self.Trait<AttackHeli>();
|
|
this.attackOnlyVisibleTargets = attackOnlyVisibleTargets;
|
|
rearmable = self.TraitOrDefault<Rearmable>();
|
|
}
|
|
|
|
public override Activity Tick(Actor self)
|
|
{
|
|
// Refuse to take off if it would land immediately again.
|
|
if (aircraft.ForceLanding)
|
|
{
|
|
Cancel(self);
|
|
return NextActivity;
|
|
}
|
|
|
|
if (IsCanceled || !target.IsValidFor(self))
|
|
return NextActivity;
|
|
|
|
var pos = self.CenterPosition;
|
|
var targetPos = attackHeli.GetTargetPosition(pos, target);
|
|
if (attackOnlyVisibleTargets && target.Type == TargetType.Actor && canHideUnderFog
|
|
&& !target.Actor.CanBeViewedByPlayer(self.Owner))
|
|
{
|
|
var newTarget = Target.FromCell(self.World, self.World.Map.CellContaining(targetPos));
|
|
|
|
Cancel(self);
|
|
self.SetTargetLine(newTarget, Color.Green);
|
|
return new HeliFly(self, newTarget);
|
|
}
|
|
|
|
// If all valid weapons have depleted their ammo and Rearmable trait exists, return to RearmActor to reload and then resume the activity
|
|
if (rearmable != null && attackHeli.Armaments.All(x => x.IsTraitPaused || !x.Weapon.IsValidAgainst(target, self.World, self)))
|
|
return ActivityUtils.SequenceActivities(new HeliReturnToBase(self, aircraft.Info.AbortOnResupply), this);
|
|
|
|
var dist = targetPos - pos;
|
|
|
|
// Can rotate facing while ascending
|
|
var desiredFacing = dist.HorizontalLengthSquared != 0 ? dist.Yaw.Facing : aircraft.Facing;
|
|
aircraft.Facing = Util.TickFacing(aircraft.Facing, desiredFacing, aircraft.TurnSpeed);
|
|
|
|
if (HeliFly.AdjustAltitude(self, aircraft, aircraft.Info.CruiseAltitude))
|
|
return this;
|
|
|
|
// Fly towards the target
|
|
if (!target.IsInRange(pos, attackHeli.GetMaximumRangeVersusTarget(target)))
|
|
aircraft.SetPosition(self, aircraft.CenterPosition + aircraft.FlyStep(desiredFacing));
|
|
|
|
// Fly backwards from the target
|
|
if (target.IsInRange(pos, attackHeli.GetMinimumRangeVersusTarget(target)))
|
|
{
|
|
// Facing 0 doesn't work with the following position change
|
|
var facing = 1;
|
|
if (desiredFacing != 0)
|
|
facing = desiredFacing;
|
|
else if (aircraft.Facing != 0)
|
|
facing = aircraft.Facing;
|
|
aircraft.SetPosition(self, aircraft.CenterPosition + aircraft.FlyStep(-facing));
|
|
}
|
|
|
|
attackHeli.DoAttack(self, target);
|
|
|
|
return this;
|
|
}
|
|
}
|
|
}
|