/// <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 CollisionWithAProjectile(Ship ship, Projectile projectile)
{
if (ship.GetID() != projectile.GetOwner() && ship.IsAlive())
{
if (WithinARadius(ship.GetLocation(), projectile.GetLocation(), shipSize))
{
// the passed in ship was hit by a projectile so we update health and remove
// the projectile from the world
HitAProjectile(ship, projectile);
}
}
}
/// <summary>
/// Returns true if ship and projectile are within collision distance, otherwise false.
/// </summary>
/// <param name="ship"></param>
/// <param name="proj"></param>
/// <returns></returns>
public bool HasCollidedShipProj(Ship ship, Projectile proj)
{
Vector2D shipLoc = ship.GetLocation();
Vector2D projLoc = proj.GetLocation();
Vector2D distanceVector = shipLoc - projLoc;
double distanceLength = distanceVector.Length();
if (distanceLength <= ShipSize && (ship.GetID() != proj.GetOwner()))
{
return(true);
}
return(false);
}
/// <summary>
/// Acts as a drawing delegate for DrawObjectWithTransform
/// After performing the necessary transformation (translate/rotate)
/// DrawObjectWithTransform will invoke this method
/// </summary>
/// <param name="o">The object to draw</param>
/// <param name="e">The PaintEventArgs to access the graphics</param>
private void ProjectileDrawer(object o, PaintEventArgs e)
{
Projectile proj = o as Projectile;
Bitmap projSprite;
int x, y;
Point p;
x = WorldSpaceToImageSpace(this.Size.Width, (int)proj.GetLocation().GetX() - (PROJECTILE_SIZE.Width / 2));
y = WorldSpaceToImageSpace(this.Size.Width, (int)proj.GetLocation().GetY() - (PROJECTILE_SIZE.Height / 2));
p = new Point(x, y);
if (theWorld.GetMarioMode() && proj.GetOwner() == theWorld.GetCurrentPlayer())
{
projSprite = marioFireball;
}
else
{
projSprite = projSprites[proj.GetOwner() % projSprites.Count];
}
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
e.Graphics.DrawImage(projSprite, p);
}
/// <summary>
/// Acts as a drawing delegate for DrawObjectWithTransform
/// After performing the necessary transformation (translate/rotate)
/// DrawObjectWithTransform will invoke this method
/// Draws a projectile accroding to the projectile images in the LoadImages method.
/// </summary>
/// <param name="o">The object to draw</param>
/// <param name="e">The PaintEventArgs to access the graphics</param>
private void ProjectileDrawer(object o, PaintEventArgs e)
{
Projectile p = o as Projectile;
int width = 20;
int height = 20;
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed;
e.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Low;
e.Graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighSpeed;
// Rectangles are drawn starting from the top-left corner.
// So if we want the rectangle centered on the projectiles's location, we have to offset it
// by half its size to the left (-width/2) and up (-height/2)
Rectangle r = new Rectangle(-(width / 2), -height, width, height);
int colorID = (p.GetOwner() % 8) + 16;
e.Graphics.DrawImage(shipImages[colorID], r);
}