78 lines
2.5 KiB
C#
78 lines
2.5 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
|
|
* This file is part of OpenRA.
|
|
*
|
|
* OpenRA is free software: you can redistribute it and/or modify
|
|
* it 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.
|
|
*
|
|
* OpenRA is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with OpenRA. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#endregion
|
|
|
|
using System.Linq;
|
|
|
|
namespace OpenRA.Traits
|
|
{
|
|
class AutoTargetInfo : StatelessTraitInfo<AutoTarget> { }
|
|
|
|
class AutoTarget : ITick, INotifyDamage
|
|
{
|
|
void AttackTarget(Actor self, Actor target)
|
|
{
|
|
var attack = self.traits.Get<AttackBase>();
|
|
if (target != null)
|
|
attack.ResolveOrder(self, new Order("Attack", self, target));
|
|
}
|
|
|
|
public void Tick(Actor self)
|
|
{
|
|
if (!self.IsIdle) return;
|
|
|
|
var attack = self.traits.Get<AttackBase>();
|
|
var range = Util.GetMaximumRange(self);
|
|
|
|
if (attack.target == null ||
|
|
(attack.target.Location - self.Location).LengthSquared > range * range + 2)
|
|
AttackTarget(self, ChooseTarget(self, range));
|
|
}
|
|
|
|
Actor ChooseTarget(Actor self, float range)
|
|
{
|
|
var inRange = self.World.FindUnitsInCircle(self.CenterLocation, Game.CellSize * range);
|
|
|
|
return inRange
|
|
.Where(a => a.Owner != null && a.Owner != self.Owner) /* todo: one day deal with friendly players */
|
|
.Where(a => Combat.HasAnyValidWeapons(self, a))
|
|
.OrderBy(a => (a.Location - self.Location).LengthSquared)
|
|
.FirstOrDefault();
|
|
}
|
|
|
|
public void Damaged(Actor self, AttackInfo e)
|
|
{
|
|
// not a lot we can do about things we can't hurt... although maybe we should automatically run away?
|
|
if (!Combat.HasAnyValidWeapons(self, e.Attacker))
|
|
return;
|
|
|
|
if (e.Attacker.Owner == self.Owner)
|
|
return; // don't retaliate against own units force-firing on us. it's usually not what the player wanted.
|
|
|
|
if (e.Damage < 0)
|
|
return; // don't retaliate against healers
|
|
|
|
var attack = self.traits.Get<AttackBase>();
|
|
if (attack.target != null) return;
|
|
|
|
AttackTarget(self, e.Attacker);
|
|
}
|
|
}
|
|
}
|