/// <summary>
/// Checks if there was a collision between a bomb and a player.
/// </summary>
/// <param name="bomb">Bomb that was launched by an Alien to be checked for collisions.</param>
protected override bool checkCollision(ProjectileSprite bomb)
{
bool collision = false;
if (bomb.GetBoundary().Intersects(player.GetBoundary()))
{
onPlayerCollision(player, 0);
collision = true;
playerDeathSound.Play();
}
return(collision);
}
/// <summary>
/// Allows the game component to update itself.
/// The AlienSquad will move to the edge of the screen, when reached will shift down 1 movement,
/// then start moving back across the screen.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Update(GameTime gameTime)
{
if (game.GetGameState() == Game1.GameState.Playing)
{
fireTime = 60;
for (int ctr1 = 0; ctr1 < alienSquad.GetLength(0); ctr1++)
{
for (int ctr2 = 0; ctr2 < alienSquad.GetLength(1); ctr2++)
{
switch (dir)
{
case Direction.LEFT:
{
if (alienSquad[ctr1, ctr2].GetAlienState() != AlienState.INACTIVE)
{
if (!alienSquad[ctr1, ctr2].TryMove(dir))
{
dir = Direction.DOWN;
previousDir = Direction.LEFT;
}
}
break;
}
case Direction.RIGHT:
{
if (alienSquad[ctr1, ctr2].GetAlienState() != AlienState.INACTIVE)
{
if (!alienSquad[ctr1, ctr2].TryMove(dir))
{
dir = Direction.DOWN;
previousDir = Direction.RIGHT;
}
}
break;
}
}
}
}
for (int ctr1 = 0; ctr1 < alienSquad.GetLength(0); ctr1++)
{
for (int ctr2 = 0; ctr2 < alienSquad.GetLength(1); ctr2++)
{
alienSquad[ctr1, ctr2].Move(dir);
if (alienSquad[ctr1, ctr2].GetAlienState() == AlienState.ACTIVE)
{
if (alienSquad[ctr1, ctr2].GetBoundary().Bottom >= screenHeight - playerSprite.GetBoundary().Height)
{
onGameOver();
}
}
}
}
if (dir == Direction.DOWN)
{
if (previousDir == Direction.LEFT)
{
dir = Direction.RIGHT;
}
if (previousDir == Direction.RIGHT)
{
dir = Direction.LEFT;
}
}
if (fireCap % fireTime == 0)
{
int squadRow = random.Next(0, alienSquad.GetLength(0));
int squadCol = random.Next(0, alienSquad.GetLength(1));
if (alienSquad[squadRow, squadCol].GetAlienState() != AlienState.INACTIVE)
{
bomb.Launch(alienSquad[squadRow, squadCol].GetBoundary(), gameTime);
}
}
fireCap++;
}
base.Update(gameTime);
}