/// <summary>
/// Called during Preparation
/// </summary>
SpellFailedReason PrepareAI()
{
var caster = CasterUnit;
SourceLoc = caster.Position;
if (caster.Target != null)
{
caster.SpellCast.TargetLoc = caster.Target.Position;
}
// init handlers pre-maturely, to make sure we got any targets
// revalidate handlers again, later
var err = PrepareHandlers();
if (err == SpellFailedReason.Ok && Targets.Count == 0)
{
// NPC must have targets
err = SpellFailedReason.NoValidTargets;
}
if (Targets.Count == 1)
{
// look at single target
var target = Targets.First() as Unit;
if (target != null)
{
caster.Target = target;
}
}
return(err);
}
/// <summary>
/// Calculates the delay until a spell impacts its target in milliseconds
/// </summary>
/// <returns>delay in ms</returns>
private int CalculateImpactDelay()
{
if (Spell.ProjectileSpeed <= 0 || Targets.Count == 0)
{
return(0);
}
float distance;
if (TriggerAction != null)
{
distance = TriggerAction.Attacker.GetDist(TriggerAction.Victim);
}
else if (CasterObject != null)
{
var target = Targets.First();
distance = target.GetDistance(CasterObject);
}
else
{
return(0);
}
//projectile speed is distance per second
return((int)((distance / Spell.ProjectileSpeed) * 1000));
}
/// <summary>
/// Makes the main target the first element in 'Targets' List
/// </summary>
public void ReconsiderMainTarget()
{
if (Targets.Count > 0)
{
MainTarget = Targets.First();
RemoveTarget(MainTarget);
}
}
private void UpdateCurrentState()
{
int[] idx = new int[3];
idx[0] = 1;
idx[1] = Arm.Compartments.Length * 4 / 10;
idx[2] = Arm.Compartments.Length - 1;
int i = 0;
Vector2D target = Targets.First().Position;
for (i = 0; i < 3; i++)
{
IEnumerable <Node> nodes = Enumerable.Concat(Arm.UpperNodes.Skip(idx[i]), Arm.LowerNodes.Skip(idx[i]));
double totalMass = nodes.Sum(v => v.Mass);
double avx = nodes.Sum(v => v.Position.PositionX * v.Mass) / totalMass;
double avy = nodes.Sum(v => v.Position.PositionY * v.Mass) / totalMass;
Vector2D point = new Vector2D(avx, avy);
CurrentState[i * 2 + 4] = point.Norm - target.Norm;
CurrentState[i * 2 + 5] = target.AngleTo(point);
if (i == 0)
{
CurrentState[0] = target.Norm;
CurrentState[1] = (new Vector2D(1, 0)).AngleTo(target);
Vector2D vel = new Vector2D(
nodes.Sum(v => v.Velocity.PositionX) / totalMass,
nodes.Sum(v => v.Velocity.PositionY) / totalMass);
CurrentState[2] = vel.Norm < 1e-7 ? 0 : vel.Norm * System.Math.Cos(point.AngleTo(vel));
CurrentState[3] = vel.Norm < 1e-7 ? 0 : vel.Norm * System.Math.Sin(point.AngleTo(vel));
}
}
CurrentState[10] = System.Math.Sign(CurrentState[8]);
CurrentState[11] = System.Math.Sign(CurrentState[9]);
CurrentState.IsTerminal = Terminal;
}
