protected void FindTarget()
{
float smallestDistance = float.MaxValue;
//This targeting scheme is just temporary, may need to send an update to the server for a set target event, similar to NPC logic
foreach (var kvp in PotentialTargets)
{
if (kvp.Value == this)
{
Console.WriteLine("Turret was targetting itself, removing from potential targets.");//Haven't been able to track down where a turret is added to its own list of potential targets
PotentialTargets.Remove(Id);
return;
}
if (kvp.Value.IsBodyValid && Vector2.Distance(kvp.Value.Position, Position) < smallestDistance && Vector2.Distance(kvp.Value.Position, Position) < turretRange)
{
smallestDistance = Vector2.Distance(kvp.Value.Position, Position);
CurrentTarget = kvp.Value;
}
}
}
public override void Simulate(IGameTimeService gameTime)
{
if (!IsBodyValid)
{
return;
}
Weapon.Update(gameTime);
DelayTime += gameTime.ElapsedMilliseconds; // Used for Loading.
#region Logic
if (logicState != LogicStates.Resting && (CurrentTarget == null || !CurrentTarget.IsBodyValid))
{
CurrentTarget = null;
logicState = LogicStates.SearchingForTarget;
}
switch (logicState)
{
case LogicStates.Resting:
if (PotentialTargets.Count > 0)
{
logicState = LogicStates.SearchingForTarget;
}
break;
case LogicStates.SearchingForTarget:
FindTarget();
if (CurrentTarget != null)
{
logicState = LogicStates.TurningTowardTarget;
}
break;
case LogicStates.TurningTowardTarget:
if (!CurrentTarget.IsBodyValid)
{
PotentialTargets.Remove(CurrentTarget.Id);
CurrentTarget = null;
logicState = LogicStates.Resting;
break;
}
if (gameTime.TotalMilliseconds - _lastTargetCheckTime > 200) //Retargets closest item 5 times per second
//Retargeting is expensive, if turrets lag this needs to be rethought
{
_lastTargetCheckTime = (float)gameTime.TotalMilliseconds;
CurrentTarget = null;
logicState = LogicStates.Resting;
break;
}
if (Vector2.Distance(CurrentTarget.Position, Position) > turretRange)
{
CurrentTarget = null;
logicState = LogicStates.Resting;
break;
}
var result = AIHelper.TurnTowardPosition(Rotation, rotationSpeed, Position, CurrentTarget.Position, gameTime.ElapsedMilliseconds, AimTolerance);
Rotation = result.Rotation;
if (!result.Rotated)
{
if (Weapon.CanFire())
{
Weapon.TimeOfWaitStart = gameTime.TotalMilliseconds;
Weapon.Fire_LocalOrigin(Rotation, 0, true);
Weapon.WaitingForFireResponse = true;
}
}
break;
}
#endregion
OldTime += gameTime.ElapsedMilliseconds; // Updates Time since Last Action
}
public override void Update(IGameTimeService gameTime)
{
if (IsLocalSim)
{
Simulate(gameTime);
return;
}
if (IsDead)
{
return;
}
Weapon.Update(gameTime);
DelayTime += gameTime.ElapsedMilliseconds; // Used for Loading.
#region Logic
//0 = No target(s) in range, laser at rest
//1 = Target(s) on planet, find one
//2 = Turn head to aim or Fire if within aim tolerance
//3 = Fire
switch (logicState)
//Just FYI in case you're confused, a locally simulated turret doesn't run this code, it runs .Simulate() instead.
{
case LogicStates.Resting:
if (PotentialTargets.Count > 0)
{
logicState = LogicStates.SearchingForTarget;
}
break;
case LogicStates.SearchingForTarget:
FindTarget();
if (CurrentTarget != null)
{
logicState = LogicStates.TurningTowardTarget;
}
break;
case LogicStates.TurningTowardTarget:
if (CurrentTarget == null)
{
logicState = LogicStates.Resting;
break;
}
else if (CurrentTarget != null && !CurrentTarget.IsBodyValid)
{
PotentialTargets.Remove(CurrentTarget.Id);
CurrentTarget = null;
logicState = LogicStates.Resting;
break;
}
else if (gameTime.TotalMilliseconds - _lastTargetCheckTime > 200)
//Retargets closest item 5 times per second
//Retargeting is expensive, if turrets lag this needs to be rethought
{
_lastTargetCheckTime = (float)gameTime.TotalMilliseconds;
CurrentTarget = null;
logicState = LogicStates.Resting;
break;
}
else if (Vector2.Distance(CurrentTarget.Position, Position) > turretRange)
{
CurrentTarget = null;
logicState = LogicStates.Resting;
break;
}
Rotation = AIHelper.TurnTowardPosition(
Rotation, rotationSpeed,
Position, CurrentTarget.Position,
gameTime.ElapsedMilliseconds, AimTolerance
).Rotation;
break;
}
#endregion
OldTime += gameTime.ElapsedMilliseconds; // Updates Time since Last Action
}