protected override void Update(GameTime gameTime)
{
//Escape - quits the game
if (Keyboard.GetState().GetPressedKeys().Contains <Keys>(Keys.Escape))
{
this.Exit();
}
explosionEffect.Update(gameTime);
if (!lost)
{
//Space - fires a missile
if (Keyboard.GetState().GetPressedKeys().Contains <Keys>(Keys.Space))
{
fireMissile((int)gameTime.TotalGameTime.TotalMilliseconds);
}
ship.Update(gameTime, GraphicsDevice.Viewport.Bounds);
List <int> asteroidsToRemove = new List <int>();
List <int> missilesToRemove = new List <int>();
//Update missiles and remove ones that have gone off screen
float x, y;
for (int i = 0; i < projectiles.Count; i++)
{
projectiles[i].Update(gameTime, GraphicsDevice.Viewport.Bounds);
x = projectiles[i].Position.X;
y = projectiles[i].Position.Y;
if (x < -missileScreenPadding || x > WIDTH + missileScreenPadding ||
y < -missileScreenPadding || y > HEIGHT + missileScreenPadding)
{
missilesToRemove.Add(i);
}
}
//Update asteroids and handle collision with ship and missiles
bool done = false;
for (int i = 0; i < asteroids.Count && !done; i++)
{
asteroids[i].Update(gameTime, GraphicsDevice.Viewport.Bounds);
if (ship.CollisionRect.Intersects(asteroids[i].CollisionRect))
{
lost = true;
explode.Play();
explosionEffect.AddExplosion(ship.Position, 75, 1000, 3500, gameTime);
asteroidsToRemove.Add(i);
}
for (int j = 0; j < projectiles.Count && !done; j++)
{
projectiles[j].Update(gameTime, GraphicsDevice.Viewport.Bounds);
if (asteroids[i].CollisionRect.Intersects(projectiles[j].CollisionRect))
{
done = true;
gunshot.Play();
asteroidsToRemove.Add(i);
missilesToRemove.Add(j);
explosionEffect.AddExplosion(asteroids[i].Position, 20, 100, 1000, gameTime);
}
}
}
//Remove asteroids and missiles that have collided
for (int i = asteroidsToRemove.Count - 1; i >= 0; i--)
{
asteroids.RemoveAt(asteroidsToRemove[i]);
}
for (int i = missilesToRemove.Count - 1; i >= 0; i--)
{
projectiles.RemoveAt(missilesToRemove[i]);
}
}
base.Update(gameTime);
}
protected override void Update(GameTime gameTime)
{
//Escape - quits the game
if (Keyboard.GetState().GetPressedKeys().Contains <Keys>(Keys.Escape))
{
this.Exit();
}
explosionEffect.Update(gameTime);
if (!lost)
{
//Space - fires a missile
if (Keyboard.GetState().GetPressedKeys().Contains <Keys>(Keys.Space))
{
fireMissile((int)gameTime.TotalGameTime.TotalMilliseconds);
}
ship.Update(gameTime, GraphicsDevice.Viewport.Bounds);
int index = 0;
List <int> ids = new List <int>();
foreach (ProjectileSprite ps in projectiles)
{
ps.Update(gameTime, GraphicsDevice.Viewport.Bounds);
if (ps.Position.X < -missile.Height * MISSILE_SCALE * 2 || ps.Position.X > WIDTH + missile.Height * MISSILE_SCALE * 2 ||
ps.Position.Y < -missile.Height * MISSILE_SCALE * 2 || ps.Position.Y > HEIGHT + missile.Height * MISSILE_SCALE * 2)
{
ids.Add(index);
}
index++;
}
for (int i = ids.Count - 1; i >= 0; i--)
{
projectiles.RemoveAt(ids[i]);
}
//Check collision between ship/missile and asteroid
int d = 0;
foreach (BouncingSprite bs in asteroids)
{
bs.Update(gameTime, GraphicsDevice.Viewport.Bounds);
if (ship.CollisionRect.Intersects(bs.CollisionRect))
{
lost = true;
explode.Play();
explosionEffect.AddExplosion(ship.Position, 75, 1500, 3500, gameTime);
break;
}
d++;
}
List <int> hitAsteroids = new List <int>();
if (lost)
{
hitAsteroids.Add(d);
}
List <int> hitMissiles = new List <int>();
for (int i = 0; i < asteroids.Count; i++)
{
for (int j = 0; j < projectiles.Count; j++)
{
if (asteroids[i].CollisionRect.Intersects(projectiles[j].CollisionRect))
{
gunshot.Play();
hitAsteroids.Add(i);
hitMissiles.Add(j);
explosionEffect.AddExplosion(asteroids[i].Position, 20, 100, 1000, gameTime);
}
}
}
for (int i = hitAsteroids.Count - 1; i >= 0; i--)
{
asteroids.RemoveAt(hitAsteroids[i]);
}
for (int i = hitMissiles.Count - 1; i >= 0; i--)
{
projectiles.RemoveAt(hitMissiles[i]);
}
}
base.Update(gameTime);
}