public override void Damage(Unit source, float amount)
{
base.Damage(source, amount);
// If an enemy attacked us, we should automatically attack back.
// Change this if you want to have certain orders for units (for
// example to force them to stand ground even when attacked).
if (this.AttackTarget == null && source != null)
this.AttackTarget = source;
}
public override bool RightAction(RTSWorld world)
{
MouseState mouse = Mouse.GetState();
// Cancel existing attack target.
this.AttackTarget = null;
// Handle enemy unit detection under mouse cursor here.
foreach (IEntity e in world.Entities)
{
if (e is Unit)
{
Unit u = e as Unit;
// Check to see if the unit is under the mouse cursor.
if (u.CollidesAt<Unit>(world, mouse.X, mouse.Y) != u)
continue;
// Check to see if this unit is on our team.
if (u.Team == this.Team)
continue;
// Check to make sure unit is synchronised across machines.
if (u.SynchronisationData == null)
throw new InvalidOperationException("Attack requested against unit that is not synchronised on network. Ensure it was spawned correctly.");
// Set this unit as our target.
this.AttackTarget = u;
if (this is MovableUnit)
(this as MovableUnit).MoveCancel();
if (this.SynchronisationData != null && u.SynchronisationData != null && this.LocallyOwned)
this.SynchronisationData.BroadcastAttack(u.SynchronisationData);
// We are attacking this unit.
return true;
}
}
return false;
}
public override void Update(World world)
{
// Check to see if we're attacking anything,
if (this.AttackTarget != null && this.AttackTarget.Team != this.Team && !this.Killed)
{
// Check to see if we need to move closer.
if ((new Vector2(this.AttackTarget.X, this.AttackTarget.Y) - new Vector2(this.X, this.Y)).Length() > this.AttackRange)
{
// Need to move closer, find a spot near the unit that
// is currently free.
if (this is MovableUnit)
{
// Check to make sure we're not already moving.
if (!(this as MovableUnit).MoveIsPathing)
{
(this.Level.World as RTSWorld).UiManager.Log("unit started pathing toward attack target.");
(this as MovableUnit).MoveTo(new Vector2(this.AttackTarget.X, this.AttackTarget.Y));
}
else
(this.Level.World as RTSWorld).UiManager.Log("unit attacking, out-of-range and pathing.");
}
else
{
(this.Level.World as RTSWorld).UiManager.Log("immovable unit attempting to attack unit outside range; cancelling.");
this.AttackTarget = null;
}
}
else
{
// Otherwise, we are in range of the attack target, so we
// can kill it.
// TODO: Use a timer with attack speed here.
(this.Level.World as RTSWorld).UiManager.Log("unit damaging it's attack target.");
if (this is MovableUnit)
(this as MovableUnit).MoveCancel();
this.AttackTarget.Damage(this, this.AttackPower);
}
}
base.Update(world);
}
/// <summary>
/// Damages this unit by the specified amount, killing it if applicable.
/// </summary>
/// <param name="source">The unit which damaged this unit, if applicable (null otherwise).</param>
/// <param name="amount">The initial damage done to the unit, prior to damage reduction.</param>
public virtual void Damage(Unit source, float amount)
{
this.CurrentHealth -= Math.Max(amount - this.Armor, 0);
(this.Level.World as RTSWorld).UiManager.Log("unit took " + Math.Max(amount - this.Armor, 0) + " damage.");
// Check to see if we are dead.
if (this.CurrentHealth < 0)
this.Kill();
}