//
// Constructors
//
public CollisionSubscription() : base()
{
this.listOfSubscribers = new ContainerList();
this.collisionName = CollisionPairEvaluator.Name.UNINITIALIZED;
}
//
// Methods
//
/// <summary>
/// Sets the name of this collison subscription
/// </summary>
/// <param name="newName"></param>
public void SetName(CollisionPairEvaluator.Name newName)
{
this.collisionName = newName;
}
/// <summary>
/// Executes when a collison occurs with another GameObject
/// </summary>
/// <param name="collisonName"></param>
/// <param name="other"></param>
/// <returns>
/// <c>true</c> if the object is to be deleted
/// </returns>
public override bool OnCollide(CollisionPairEvaluator.Name collisonName, GameObject other)
{
bool willBeDeleted = false;
return(willBeDeleted);
}
/// <summary>
/// Set the name of this collision pair
/// </summary>
/// <param name="newName"></param>
public void SetName(CollisionPairEvaluator.Name newName)
{
this.name = newName;
this.subscription.SetName(newName);
}
//
// Methods
//
/// <summary>
/// Notifies the subscriber that a collison happened
/// </summary>
/// <param name="collisonName"></param>
public void NotifySubscriber(CollisionPairEvaluator.Name collisonName)
{
this.subscriber.OnCollisionNotified(collisonName);
}
/// <summary>
/// This method gets called when a collision occurs
/// that this object observes (subscribes to)
/// </summary>
/// <param name="collisionName"></param>
public void OnCollisionNotified(CollisionPairEvaluator.Name collisionName)
{
// Walls vs Aliens
if (collisionName == CollisionPairEvaluator.Name.Wall_vs_Alien)
{
if (this.isGoingDown == false)
{
// Prepare the aliens to move downward
// But only if the coordinator is moving right toward the right wall
bool approachingRightWall = this.progressionSteps > 0.0f && this.Collider.X > Constants.SCREEN_CENTER_X;
// Or if the coordinator is moving left toward the left wall
bool approachingLeftWall = this.progressionSteps < 0.0f && this.Collider.X < Constants.SCREEN_CENTER_X;
if (approachingLeftWall || approachingRightWall)
{
this.MoveDownward();
}
}
}
// PlayerLaser vs Alien
else if (collisionName == CollisionPairEvaluator.Name.PlayerLaser_vs_Alien)
{
// An alien died
this.numberOfAliens--;
// Get the new progression time
this.progressionTime = this.SpeedUpFormula(this.TotalAliens - this.numberOfAliens);
if (this.progressionTime < 0.0f)
{
this.progressionTime = 0.1f;
}
this.Animator.AssignNewIntervalTime(this.progressionTime);
// Get new progression step
float newProgressionDelta = this.ProgressionIncreaseFormula(this.TotalAliens - this.numberOfAliens);
if (progressionSteps > 0.0f) // positive
{
this.progressionSteps += newProgressionDelta;
}
else // negative
{
this.progressionSteps -= newProgressionDelta;
}
if (this.isGoingDown == false)
{
this.Animator.AssignNewXChange(this.progressionSteps);
}
// Sync the movement with the sprite animations
this.AnimatorSquid.AssignNewIntervalTime(this.progressionTime);
this.AnimatorCrab.AssignNewIntervalTime(this.progressionTime);
this.AnimatorOctopus.AssignNewIntervalTime(this.progressionTime);
}
// Player vs Alien
else if (collisionName == CollisionPairEvaluator.Name.Player_vs_Alien)
{
// Player just died. Stop moving.
this.StopMoving();
}
// For AlienLaser vs anything
else if (collisionName == CollisionPairEvaluator.Name.PlayerLaser_vs_AlienLaser ||
collisionName == CollisionPairEvaluator.Name.Player_vs_AlienLaser ||
collisionName == CollisionPairEvaluator.Name.AlienLaser_vs_Shield ||
collisionName == CollisionPairEvaluator.Name.AlienLaser_vs_WallBottom)
{
// A laser died. Allow more laser in the future.
this.numberOfLasers--;
if (this.numberOfLasers < 0)
{
this.numberOfLasers = 0;
}
// If specifically Player vs. AlienLaser
if (collisionName == CollisionPairEvaluator.Name.Player_vs_AlienLaser)
{
// Player just died. Stop moving.
this.StopMoving();
}
}
}
/// <summary> /// Executes when a collison occurs with another GameObject /// </summary> /// <param name="collisonName"></param> /// <param name="other"></param> /// <returns> /// <c>true</c> if the object is to be deleted /// </returns> abstract public bool OnCollide(CollisionPairEvaluator.Name collisonName, GameObject other);
