} // end method CheckForInvadersShot
/// <summary>
/// This method checks to see if an invader was hit by bomb,
/// which expands outward and is different from a shot.
/// </summary>
private void CheckForInvadersBombed()
{
for (int i = playerBombs.Count - 1; i >= 0; i--)
{
if (!playerBombs[i].Exploded)
{
List<Point> bombLocations = playerBombs[i].AllCollisionPoints;
AreaUser expandingBomb = playerBombs[i];
var invaderCollisions =
from hitInvader in invaders
where WasHit(hitInvader, expandingBomb)
select hitInvader;
if (invaderCollisions.Count() > 0)
{
gotPointsFromShots = false;
if (!playerBombs[i].Expanding) playerBombs[i].Expanding = true;
List<Invader> deadInvaders = new List<Invader>();
foreach (var deadInvader in invaderCollisions)
deadInvaders.Add(deadInvader);
foreach (Invader deadInvader in deadInvaders)
{
KillInvader(deadInvader);
} // end foreach
} // end if
}
// If the bomb HAS exploded, remove it.
else playerBombs.Remove(playerBombs[i]);
}// end for
} // end method CheckForInvadersBombed
/// <summary>
/// This method checks to see if an invader was hit by an attack.
/// </summary>
/// <param name="hitInvader">The invader to check for hits.</param>
/// <param name="attackArea">The AreaUser reference to use to get
/// a list of points representing all points along the outer edge of the attack.</param>
/// <returns>A boolean indicating whether or not the invader was hit.</returns>
private bool WasHit(Invader hitInvader, AreaUser attackArea)
{
List<Point> hitPointList = attackArea.AllCollisionPoints;
List<Point> invaderCollisionList = hitInvader.AllCollisionPoints;
foreach (Point point in hitPointList)
if (hitInvader.Area.Contains(point)) return true;
foreach (Point point in invaderCollisionList)
if (attackArea.Area.Contains(point)) return true;
return false;
}