/// <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)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
{
Exit();
}
KeyboardState state = Keyboard.GetState();
if (currentState == GameState.Playing || currentState == GameState.Victory)
{
// Moving Logic
if (state.IsKeyDown(Keys.A))
{
player.Position.X -= 7;
}
if (state.IsKeyDown(Keys.D))
{
player.Position.X += 7;
}
// Collision Logic
if (player.Position.X >= GraphicsDevice.Viewport.Width - player.GetWidth())
{
player.Position.X = GraphicsDevice.Viewport.Width - player.GetWidth();
}
else if (player.Position.X <= 0)
{
player.Position.X = 0;
}
// Shooting
if (state.IsKeyDown(Keys.Space) && cooldown >= 30)
{
Texture2D bullet = Content.Load <Texture2D>("blast_shot_blue");
playerBullets.Add(
new Bullet(bullet,
new Vector2(player.Position.X + player.GetWidth() / 2 - bullet.Width / 2, player.Position.Y),
player,
new Vector2(0, -8)
));
cooldown = 0;
}
// Player Bullets Logic
for (int i = 0; i < playerBullets.Count; i++)
{
Bullet bullet = playerBullets[i];
bullet.Move();
bullet.UpdateLogic();
if (bullet.Position.Y <= 0 - bullet.GetHeight() || bullet.Position.Y >= GraphicsDevice.Viewport.Height)
{
playerBullets.Remove(bullet);
}
foreach (List <Invader> invadersList in invaders)
{
foreach (Invader invader in invadersList)
{
invader.UpdateLogic();
if (bullet.Intersects(invader.Box) && invader.IsShot == false)
{
invader.IsShot = true;
bullet.isUsed = true;
break;
}
}
}
for (int a = 0; a < invaders.Count; a++)
{
List <Invader> invadersList = invaders[a];
for (int b = 0; b < invadersList.Count; b++)
{
if (invadersList[b].IsShot)
{
invadersList.Remove(invadersList[b]);
}
}
}
if (bullet.isUsed)
{
playerBullets.Remove(bullet);
}
}
// Invaders moving
foreach (List <Invader> invadersList in invaders)
{
foreach (Invader invader in invadersList)
{
invader.Move();
if (invader.Position.X >= GraphicsDevice.Viewport.Width - invader.GetWidth())
{
invader.Position.X = GraphicsDevice.Viewport.Width - invader.GetWidth();
invader.ChangeVelocityXSign();
}
if (invader.Position.X <= 0)
{
invader.Position.X = 0;
invader.ChangeVelocityXSign();
}
invader.UpdateLogic();
}
}
// Invaders Shooting
Random random = new Random();
foreach (List <Invader> invadersList in invaders)
{
foreach (Invader invader in invadersList)
{
if (invader.Position.Y >= 0 - invader.GetHeight() && invader.Cooldown >= invader.MaxCooldown)
{
Texture2D bullet = Content.Load <Texture2D>("blast_shot_red");
invaderBullets.Add(
new Bullet(bullet,
new Vector2(invader.Position.X + invader.GetWidth() / 2 - bullet.Width / 2, invader.Position.Y + invader.GetHeight()),
invader,
new Vector2(0, 8)
));
invader.ResetCooldown();
}
else if (invader.Position.Y >= 0 - invader.GetHeight())
{
invader.IncreaseCooldown();
}
}
}
// Invaders Bullets Logic
for (int i = 0; i < invaderBullets.Count; i++)
{
Bullet bullet = invaderBullets[i];
bullet.Move();
bullet.UpdateLogic();
if (bullet.Position.Y <= 0 - bullet.GetHeight() || bullet.Position.Y >= GraphicsDevice.Viewport.Height)
{
invaderBullets.Remove(bullet);
}
if (player.IntersectsCut(bullet.Box, 30))
{
bullet.isUsed = true;
currentState = GameState.GameOver;
}
if (bullet.isUsed)
{
invaderBullets.Remove(bullet);
}
}
// Check if row is empty
for (int a = 0; a < invaders.Count; a++)
{
if (invaders[a].Count == 0)
{
invaders.Remove(invaders[a]);
}
}
// Victory Conditions
if (invaders.Count == 0)
{
currentState = GameState.Victory;
}
player.UpdateLogic();
invaderCooldown += 1;
cooldown += 1;
}
// Fullscreen on or off
if (state.IsKeyDown(Keys.F))
{
if (graphics.IsFullScreen == true)
{
graphics.IsFullScreen = false;
}
else if (graphics.IsFullScreen == false)
{
graphics.IsFullScreen = true;
}
graphics.ApplyChanges();
}
// Runs this if it is game over.
if (currentState == GameState.GameOver || currentState == GameState.Victory)
{
if (state.IsKeyDown(Keys.R))
{
currentState = GameState.Restarting;
}
}
// Runs when restarting
if (currentState == GameState.Restarting)
{
if (restartingCounter == 0)
{
restartingCounter = 180;
currentState = GameState.Playing;
}
if (restartingCounter == 180)
{
Texture2D ship = Content.Load <Texture2D>("ship_2");
Texture2D invader = Content.Load <Texture2D>("invader_1");
player = new Player(ship, new Vector2(GraphicsDevice.Viewport.Width / 2 - (ship.Width / 2) * scale, GraphicsDevice.Viewport.Height - ship.Height * scale));
player.SetScale(scale);
int invaderCount = 8;
int rows = 4;
invaders = new List <List <Invader> >();
playerBullets = new List <Bullet>();
invaderBullets = new List <Bullet>();
Random random = new Random();
for (int a = 0; a < rows; a++)
{
invaders.Add(new List <Invader>());
for (int i = 0; i < invaderCount; i++)
{
invaders[a].Add(new Invader(
invader,
new Vector2(((GraphicsDevice.Viewport.Width / invaderCount) * i), 10 - (invader.Height + 20) * a),
new Vector2(4, 0.25f),
random.Next(160, 300)
));
}
}
}
restartingCounter -= 1;
}
base.Update(gameTime);
}