/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
// PLAYER CONTROLS
if (Keyboard.GetState().IsKeyDown(Keys.Escape))
{
Exit();
}
if (Keyboard.GetState().IsKeyDown(Keys.Left))
{
if (player.Position.X > 4)
{
player.Position.X -= 4;
player.UpdateBoundingBox();
}
}
if (Keyboard.GetState().IsKeyDown(Keys.Right))
{
if (player.Position.X + playerTex.Width < ResolutionX)
{
player.Position.X += 4;
player.UpdateBoundingBox();
}
}
if (Keyboard.GetState().IsKeyDown(Keys.Space))
{
if ((gameTime.TotalGameTime.TotalMilliseconds - playerFireCooldown) > lastFired)
{
FireBullet(player.Position, gameTime);
lastFired = (int)gameTime.TotalGameTime.TotalMilliseconds;
}
}
//----------------------------------------
// ENEMY PROCEDURES
foreach (Enemy enemy in enemies)
{
// Move enemy
if (enemy.Position.X - enemy.MovePattern[enemy.CurrentGoal].X < 0)
{
enemy.Position.X += enemy.MoveSpeed;
enemy.UpdateBoundingBox();
}
else if (enemy.Position.X - enemy.MovePattern[enemy.CurrentGoal].X > 0)
{
enemy.Position.X -= enemy.MoveSpeed;
enemy.UpdateBoundingBox();
}
else //current move goal reached, change move goal
{
if (enemy.CurrentGoal + 1 == enemy.MovePattern.Length)
{
enemy.CurrentGoal = 0;
}
else
{
enemy.CurrentGoal++;
}
}
// Detertime bomb dropping
if (gameTime.TotalGameTime.TotalMilliseconds - enemy.LastDropped > bombDropCooldown)
{
if (random.Next(1, bombDropChance + 1) == bombDropChance)
{
DropBomb(enemy.Position, gameTime);
}
enemy.LastDropped = (int)gameTime.TotalGameTime.TotalMilliseconds;
}
}
//----------------------------------------
// ADVANCE PROJECTILES AND CHECK COLLISIONS
for (int i = 0; i < bullets.Count; i++)
{
Projectile p = bullets[i];
p.Position.Y -= 10;
p.UpdateBoundingBox();
if (p.Position.Y < -(p.Texture.Height))
{
bullets.Remove(p);
continue;
}
// Collision detection
for (int j = 0; j < bunkers.Count; j++)
{
Bunker b = bunkers[j];
if (p.BoundingBox.Intersects(b.BoundingBox))
{
bullets.Remove(p);
b.Health--;
if (b.Health < 0)
{
bunkers.Remove(b);
}
else
{
b.Texture = bunker_hit[b.Health];
}
break;
}
}
for (int k = 0; k < enemies.Count; k++)
{
Enemy enemy = enemies[k];
if (p.BoundingBox.Intersects(enemy.BoundingBox))
{
enemies.Remove(enemy);
bullets.Remove(p);
break;
}
}
}
for (int i = 0; i < bombs.Count; i++)
{
Bomb b = bombs[i];
b.Position.Y += 10;
b.UpdateBoundingBox();
// Collision detection
for (int j = 0; j < bunkers.Count; j++)
{
Bunker bunker = bunkers[j];
if (b.BoundingBox.Intersects(bunker.BoundingBox))
{
bombs.Remove(b);
bunker.Health--;
if (bunker.Health < 0)
{
bunkers.Remove(bunker);
}
else
{
bunker.Texture = bunker_hit[bunker.Health];
}
break;
}
}
if (b.BoundingBox.Intersects(ground.BoundingBox) ||
b.Position.Y > ResolutionY)
{
bombs.Remove(b);
}
}
//----------------------------------------
base.Update(gameTime);
}
