/// <summary>
/// When a ship is hit by a projectile then remove the a health point remove
/// the projectile form the world
/// </summary>
private void HitAProjectile(Ship ship, Projectile projectile)
{
if (kingIsOn)
{
// find the owner of the projectile
int shipID = projectile.GetOwner();
if (allShips.TryGetValue(shipID, out Ship projectileShip))
{
// if the projectile is from the king or the ship is the king then...
if (ship.IsKing() || projectileShip.IsKing())
{
// subtract a health point from the ship
ship.SetHP(ship.GetHP() - 1);
if (!ship.IsAlive())
{
// increase the ship's score who shot the projectile by 1
projectileShip.SetScore(projectileShip.GetScore() + 1);
}
// register that the projectile hit a non-team member
ship.ShotsHit++;
}
if (ship.IsKing() && !ship.IsAlive())
{
// make sure that the ship that died is no longer king
ship.SetKing(false);
ship.SetName(ship.GetName().Substring(5));
// select a new king
Ship newKingShip = RandomShip();
newKingShip.SetKing(true);
newKingShip.SetName("King " + newKingShip.GetName());
}
}
// set the projectile to dead
projectile.Alive(false);
}
else
{
// subtract a health point
ship.SetHP(ship.GetHP() - 1);
if (!ship.IsAlive())
{
// find the owner of the projectile
int shipID = projectile.GetOwner();
allShips.TryGetValue(shipID, out Ship projectileShip);
// increase the ship's score who shot the projectile by 1
projectileShip.SetScore(projectileShip.GetScore() + 1);
}
// set the projectile to dead
projectile.Alive(false);
// register that the projectile hit a ship
ship.ShotsHit++;
}
}
/// <summary>
/// Detects whether or not a ship is hit by a projectile
/// </summary>
private void CollisionBetweenAStarAndProjectile(Star star, Projectile projectile)
{
if (WithinARadius(star.GetLocation(), projectile.GetLocation(), starSize))
{
// the passed in projectile hit a star so we remove it from the world
projectile.Alive(false);
}
}
/// <summary>
/// When the projectile is off the screen then remove the projectile
/// from the world and return true. Else, if it was not removed return
/// false;
/// </summary>
private bool ProjectileOffScreen(Projectile projectile)
{
int borderCoordinate = universeSize / 2;
// check to see if its on the edge of the world
if (Math.Abs(projectile.GetLocation().GetX()) >= borderCoordinate)
{
projectile.Alive(false);
return(true);
}
// check to see if its on the edge of the world
else if (Math.Abs(projectile.GetLocation().GetY()) >= borderCoordinate)
{
projectile.Alive(false);
return(true);
}
return(false);
}