/// <summary>
/// Initializes a new instance of the <see cref="UpdateAsteroidStateMessage"/> class.
/// </summary>
/// <param name="asteroid">
/// The asteroid.
/// </param>
public UpdateAsteroidStateMessage(Asteroid asteroid)
{
this.Id = asteroid.Id;
this.Position = asteroid.SimulationState.Position;
this.Velocity = asteroid.SimulationState.Velocity;
this.Rotation = asteroid.SimulationState.Rotation;
this.MessageTime = NetTime.Now;
}
/// <summary>
/// Initializes a new instance of the <see cref="AsteroidStateChangedArgs"/> class.
/// </summary>
/// <param name="asteroid">
/// The asteroid.
/// </param>
public AsteroidStateChangedArgs(Asteroid asteroid)
{
this.Asteroid = asteroid;
}
/// <summary>
/// The is on screen.
/// </summary>
/// <param name="asteroid">
/// The asteroid.
/// </param>
/// <returns>
/// The is on screen.
/// </returns>
private bool IsOnScreen(Asteroid asteroid)
{
return
asteroid.Bounds.Intersects(
new Rectangle(
-this.screenPadding.Left,
-this.screenPadding.Top,
this.resolutionManager.DisplayViewport.Width + this.screenPadding.Right,
this.resolutionManager.DisplayViewport.Height + this.screenPadding.Bottom));
}
/// <summary>
/// The bounce asteroids.
/// </summary>
/// <param name="asteroid1">
/// The asteroid 1.
/// </param>
/// <param name="asteroid2">
/// The asteroid 2.
/// </param>
private void BounceAsteroids(Asteroid asteroid1, Asteroid asteroid2)
{
Vector2 cOfMass = (asteroid1.SimulationState.Velocity + asteroid2.SimulationState.Velocity) / 2;
Vector2 normal1 = asteroid2.Center - asteroid1.Center;
normal1.Normalize();
Vector2 normal2 = asteroid1.Center - asteroid2.Center;
normal2.Normalize();
Vector2 newVelocity = asteroid1.SimulationState.Velocity - cOfMass;
newVelocity = Vector2.Reflect(newVelocity, normal1);
asteroid1.SimulationState.Velocity = newVelocity + cOfMass;
newVelocity = asteroid2.SimulationState.Velocity - cOfMass;
newVelocity = Vector2.Reflect(newVelocity, normal2);
asteroid2.SimulationState.Velocity = newVelocity + cOfMass;
this.OnAsteroidStateChanged(asteroid1);
this.OnAsteroidStateChanged(asteroid2);
}
/// <summary>
/// The on asteroid state changed.
/// </summary>
/// <param name="asteroid">
/// The asteroid.
/// </param>
protected virtual void OnAsteroidStateChanged(Asteroid asteroid)
{
EventHandler<AsteroidStateChangedArgs> asteroidEntityStateChanged = this.AsteroidStateChanged;
if (asteroidEntityStateChanged != null)
{
asteroidEntityStateChanged(this, new AsteroidStateChangedArgs(asteroid));
}
}
/// <summary>
/// The add asteroid.
/// </summary>
/// <param name="id">
/// The id.
/// </param>
/// <param name="position">
/// The position.
/// </param>
/// <param name="velocity">
/// The velocity.
/// </param>
/// <param name="rotation">
/// The rotation.
/// </param>
/// <returns>
/// </returns>
public Asteroid AddAsteroid(long id, Vector2 position, Vector2 velocity, float rotation)
{
if (this.asteroids.ContainsKey(id))
{
return this.asteroids[id];
}
var asteroid = new Asteroid(
id,
this.spriteSheet,
this.initialAsteroidFrame,
this.noOfAsteroidFrames,
this.asteroidCollisionRadius,
new EntityState { Position = position, Rotation = rotation, Velocity = velocity });
this.asteroids.Add(asteroid.Id, asteroid);
return asteroid;
}