/// <summary>
/// Called in response to the BaseModel.Update signal. This method is responsible for rotating
/// the turret to face the nearest enemy.
/// </summary>
/// <param name="sender">The BaseModel object which sent the Update signal.</param>
/// <param name="e">The UpdateArgs containing the current TimeSpan.</param>
void OnUpdate(object sender, UpdateArgs e)
{
// Find the nearest enemy.
Enemy focus = Enemy.FindNearestLiving(this, playerId);
if (focus != null)
{
// Get the difference between the bullet's location and that of the target.
Vector2 target = focus.Location - Location;
// Figure out the relative orientation and cap the rate of rotation.
float orientMod = (float) Math.Atan2(target.Y, target.X) - Orientation;
float turnSpeed = Constants.TURRET_TURNSPEED / Constants.UPDATES_PER_SECOND;
while (orientMod < -Math.PI) orientMod += (float) Math.PI * 2;
if (Math.Abs(orientMod) > turnSpeed)
{
orientMod = orientMod > 0 ? turnSpeed : -turnSpeed;
}
Orientation += orientMod;
}
}
/// <summary>
/// Called in response to BaseModel.Update when the turret doesn't exist yet. Float around and
/// rotate idly.
/// </summary>
/// <param name="sender">The BaseModel object which sent the Update signal.</param>
/// <param name="e">The UpdateArgs containing the current TimeSpan.</param>
void GhostUpdate(object sender, UpdateArgs e)
{
BaseModel model = (BaseModel) sender;
Vector2 originPoint = model.Tower.Location;
switch (PlayerId)
{
case 0:
originPoint -= new Vector2(0, originPoint.Y / 2);
break;
case 1:
originPoint += new Vector2(originPoint.X / 2, 0);
break;
case 2:
originPoint += new Vector2(0, originPoint.Y / 2);
break;
case 3:
originPoint -= new Vector2(originPoint.X / 2, 0);
break;
}
Vector2 acc = originPoint - Location;
//acc.Normalize();
Vector2 vel = Vector2.Transform(acc, Matrix.CreateRotationZ((float) Math.PI / 2)) + (acc / Constants.UPDATES_PER_SECOND);
Location += vel / Constants.UPDATES_PER_SECOND;
Orientation += Constants.TURRET_TURNSPEED / Constants.UPDATES_PER_SECOND;
}
/// <summary>
/// Called whenever the game sends an update event. This method is responsible for determining whether or not a
/// Click, Beat or Bar event should occur.
/// </summary>
/// <param name="sender">The BaseModel object which sent the Update signal.</param>
/// <param name="args">UpdateArgs object containing the current TimeSpan snapshot.</param>
public void OnUpdate(object sender, UpdateArgs args)
{
TimeSpan time = args.Time;
if ((time - lastClick).TotalMilliseconds > ClickDuration())
{
if (Click != null) Click(this, null);
lastClick = time;
clickCount++;
if (clickCount % clicksPerBeat == 0)
{
if (Beat != null) Beat(this, null);
lastBeat = time;
beatCount++;
if (clickCount % (timeSignature.number * clicksPerBeat) == 0)
{
if (Bar != null) Bar(this, null);
lastBar = time;
barCount++;
clickCount = 0;
beatCount = 0;
}
}
}
}
