/// <summary>
/// Invaders are shooting at player. There can be max Wave+1 shots in play area;
/// </summary>
private void ReturnFire()
{
if (_invaders.Count <= 0)
return;
int possibleShots = Wave + 1;
int shotsInvadersCanShot = _invaderShots.Count - possibleShots;
if (shotsInvadersCanShot > 0 && !(_random.Next(10)< 10 - Wave))
{
Point shotLocation;
Shot shot;
// Select invaders from last row ( only this invaders can shot)
var groupedByYPosition =
from invader in _invaders
group invader by invader.Location.Y
into invadersGroups
orderby invadersGroups.Key
select invadersGroups;
var bottomInvaders = groupedByYPosition.Last();
for (int i = 0; i < possibleShots; i++)
{
Invader invader = bottomInvaders.ElementAt(_random.Next(0, bottomInvaders.Count()));
shotLocation = new Point(invader.Location.X, invader.Location.Y + invader.Size.Height / 2);
shot = new Shot(shotLocation, Direction.Down);
_invaderShots.Add(shot);
OnShotMoved(_invaderShots.Last(), false);
}
}
}
public ShotMovedEventArgs(Shot shot, bool disappeared)
{
Shot = shot;
Disappeared = disappeared;
}
/// <summary>
/// Checks if shot collides with given invader
/// </summary>
/// <param name="playerShot"></param>
/// <param name="invader"></param>
/// <returns>True if there is collision</returns>
private bool CheckForInvaderCollision(Shot playerShot, Invader invader)
{
return CollisionHelper.CheckCollision(invader.Area, playerShot.Location);
}
/// <summary>
/// Checks if shot collides with player
/// </summary>
/// <param name="enemyShot"></param>
/// <returns>True if there is collision</returns>
private bool CheckForPlayerCollision(Shot enemyShot)
{
return CollisionHelper.CheckCollision(_player.Area, enemyShot.Location);
}
/// <summary>
/// Fire shot in the invaders
/// </summary>
public void FireShot()
{
//Check if there is place for next shot
if (MaximumPlayerShots <= _playerShots.Count)
return;
else
{
// Add new shot
Point shotLocation = new Point(_player.Location.X, _player.Location.Y + Player.PlayerSize.Height/2);
Shot shot = new Shot(shotLocation, Direction.Up);
_playerShots.Add(shot);
OnShotMoved(shot, false);
}
}
public void OnShotMoved(Shot shot, bool disappeared)
{
var shotMoved = ShotMoved;
if (shotMoved != null)
shotMoved(this, new ShotMovedEventArgs(shot, disappeared));
}
/// <summary>
/// Checks if shot collides with given invader
/// </summary>
/// <param name="playerShot"></param>
/// <param name="invader"></param>
/// <returns>True if there is collision</returns>
private bool CheckForInvaderCollision(Shot playerShot, Invader invader)
{
return(CollisionHelper.CheckCollision(invader.Area, playerShot.Location));
}
public ShotMovedEventArgs(Shot shot, bool disappeared)
{
Shot = shot;
Disappeared = disappeared;
}
private void ReturnFire()
{
if (_invaderShots.Count() > Wave + 1 || _random.Next(10) < 10 - Wave)
return;
var invaderColumns =
from invader in _invaders
group invader by invader.Location.X
into invaderGroup
orderby invaderGroup.Key descending
select invaderGroup;
var randomGroup = invaderColumns.ElementAt(_random.Next(invaderColumns.Count()));
var shooter = randomGroup.Last();
Point shotLocation = new Point(shooter.Area.X + (shooter.Size.Width / 2) - 1, shooter.Area.Bottom);
Shot invaderShot = new Shot(shotLocation, Direction.Down);
_invaderShots.Add(invaderShot);
OnShotMoved(invaderShot, false);
}
/// <summary>
/// Checks if shot collides with player
/// </summary>
/// <param name="enemyShot"></param>
/// <returns>True if there is collision</returns>
private bool CheckForPlayerCollision(Shot enemyShot)
{
return(CollisionHelper.CheckCollision(_player.Area, enemyShot.Location));
}
public void FireShot()
{
// This method checks the number of player shots on screen to make sure there aren’t too many,
// then it adds a new Shot to the _playerShots collection and fires the ShotMoved event.
if (GameOver || PlayerDying || _lastUpdated == DateTime.MinValue)
return;
if (_playerShots.Count < MaximumPlayerShots)
{
Shot shotFired = new Shot(new Point(_player.Location.X + (_player.Size.Width / 2) - 1, _player.Location.Y),
Direction.Up);
_playerShots.Add(shotFired);
OnShotMoved(shotFired, false);
}
}
public ShotMovedEventArgs(Shot shot, bool removed, bool isBomb)
{
Shot = shot;
Removed = removed;
IsBomb = isBomb;
}
public void FireShot()
{
if (_playerShots.Count() < MaximumPlayerShots)
{
Shot shot = new Shot(_player.Location, Direction.Up);
_playerShots.Add(shot);
OnShotMoved(shot, false);
}
}
private void InvaderFire(Invader invader)
{
// Get a point at the bottom center of the invader
Point shotLocation = new Point((invader.Area.BottomRight.X + invader.Area.BottomLeft.X) / 2,
invader.Area.Bottom);
Shot newShot = new Shot(shotLocation, Direction.Down);
_invaderShots.Add(newShot);
OnShotMoved(newShot, false);
}
protected void OnShotMoved(Shot shot, bool disappeared)
{
EventHandler<ShotMovedEventArgs> shotMoved = ShotMoved;
if (shotMoved != null)
{
shotMoved(this, new ShotMovedEventArgs(shot, disappeared));
}
}