public void AddEnemy(Enemy enemy)
{
enemies.Add(enemy);
}
public void Update(GameTime gameTime, KeyboardState keystate)
{
for (int i = 0; i < soundManagers.Count; i++)
soundManagers[i].isPlaying = false;
dt = (float)gameTime.ElapsedGameTime.TotalSeconds;
player.Update(dt, keystate);
// TEST : Adding test enemies
newEnemyWait -= dt;
if (newEnemyWait <= newEnemyDelay)
{
newEnemyWait += newEnemyDelay;
int testx = (int)(random.NextDouble() * (width - 40.0) + 20.0);
Enemy testenemy = new Enemy(this.game, this, testx, 16, 0, 50, 3);
AddEnemy(testenemy);
}
// :
// Update each explosion on the screen
Effect.Explosion explosion;
for (int i = 0; i < explosions.Count; i++)
{
explosion = explosions[i];
explosion.Update(dt);
if (explosion.destroyed == true)
{
explosions.RemoveAt(i);
i--;
}
}
// Update each enemy on the screen
Enemy enemy;
for (int i = 0; i < enemies.Count; i++)
{
enemy = enemies[i];
enemy.Update(dt);
// Check enemy collisions with the player
// Find the distance of the enemy from the player
double distance = Math.Sqrt(
(player.GetCenterX() - enemy.GetCenterX()) * (player.GetCenterX() - enemy.GetCenterX()) +
(player.GetCenterY() - enemy.GetCenterY()) * (player.GetCenterY() - enemy.GetCenterY())
);
if (distance <= enemy.radius + player.radius)
{
player.Kill();
}
if (enemy.destroyed == true)
{
enemies.RemoveAt(i);
i--;
}
}
//Update each bullet on the screen.
Bullet bullet;
for (int i = 0; i < playerBullets.Count; i++)
{
bullet = playerBullets[i];
bullet.Update(dt);
// Remove any off-screen bullets
if (bullet.position.X < 0 || bullet.position.X > screenWidth
|| bullet.position.Y < 0 || bullet.position.Y > screenHeight)
{
playerBullets.RemoveAt(i);
i--;
}
else
{
// Check any bullets for collision
for (int ii = 0; ii < enemies.Count; ii++)
{
enemy = enemies[ii];
// Find the distance from the bullet point to the center of the enemy circle
double distance = Math.Sqrt(
(bullet.position.X - enemy.GetCenterX()) * (bullet.position.X - enemy.GetCenterX()) +
(bullet.position.Y - enemy.GetCenterY()) * (bullet.position.Y - enemy.GetCenterY())
);
if (distance <= enemy.radius + bullet.radius)
{
enemy.Damage(bullet);
playerBullets.RemoveAt(i);
i--;
if (enemy.destroyed == true)
{
enemies.RemoveAt(ii);
ii--;
}
break;
}
}
}
}
for (int i = 0; i < enemyBullets.Count; i++)
{
bullet = enemyBullets[i];
bullet.Update(dt);
// Remove any off-screen bullets
if (bullet.position.X < 0 || bullet.position.X > screenWidth
|| bullet.position.Y < 0 || bullet.position.Y > screenHeight)
{
enemyBullets.RemoveAt(i);
i--;
}
else
{
// Check each enemy bullet for collision with the game player
double distance = Math.Sqrt(
(bullet.position.X - player.GetCenterX()) * (bullet.position.X - player.GetCenterX()) +
(bullet.position.Y - player.GetCenterY()) * (bullet.position.Y - player.GetCenterY())
);
if (distance <= player.radius + bullet.radius)
{
enemyBullets.RemoveAt(i);
i--;
player.Kill();
}
}
}
if (keystate.IsKeyDown(Keys.Escape))
game.Exit();
}