private void ProcessKeyboard(Vector3 direction, GameTime gameTime, SoundEngine soundEngine)
{
KeyboardState keys = Keyboard.GetState();
if (keys.GetPressedKeys().Length > 0)
{
if (keys.IsKeyDown(Keys.W))
{
Thrust(direction, gameTime);
soundEngine.ShipEngine.Play();
}
if (keys.IsKeyDown(Keys.D))
{
Roll(gameTime, "right");
soundEngine.ShipEngine.Play();
}
if (keys.IsKeyDown(Keys.A))
{
Roll(gameTime, "left");
soundEngine.ShipEngine.Play();
}
if (keys.IsKeyDown(Keys.Q))
{
if (this.Shrink != null)
{
this.Shrink.Activated = true;
this.ShrinkUsed = true;
soundEngine.Shrink.Play();
}
}
}
else
{
Stop(direction, gameTime);
soundEngine.ShipEngine.Stop();
}
}
private void CheckCollisions(CollisionEngine collisionEngine, SoundEngine soundEngine,
List<Powerup> powerups, List<Asteroid> asteroids)
{
// Check if the ship hits the edge of the universe
if (collisionEngine.CollidesWithEdge(this.Position, this.BoundingSphere))
{
float edge = collisionEngine.EDGE_OF_UNIVERSE;
Vector3 pos = this.Position;
if (pos.X > edge)
pos.X = edge;
if (pos.X < -edge)
pos.X = -edge;
if (pos.Y > edge)
pos.Y = edge;
if (pos.Y < -edge)
pos.Y = -edge;
if (pos.Z > edge)
pos.Z = edge;
if (pos.Z < -edge)
pos.Z = -edge;
UpdatePosition(pos);
}
// The ship is destroyed if it hits an asteroid unless it has a shield,
// in that case the asteroid is destroyed.
foreach (Asteroid asteroid in asteroids)
{
if (collisionEngine.CollideTwoObjects(this.BoundingSphere,
asteroid.BoundingSphere))
{
if (this.Shield != null)
{
asteroid.Destroyed = true;
this.Shield = null;
}
else
{
this.Destroyed = true;
LoseLife();
}
if (soundEngine.Explosion.State != SoundState.Playing)
soundEngine.Explosion.Play();
}
}
// The ship gets a powerup if it runs over it
foreach (Powerup powerup in powerups)
{
if (collisionEngine.CollideTwoObjects(this.BoundingSphere, powerup.BoundingSphere))
{
if (powerup.Type == Powerup.PowerupType.Shield && this.Shield == null)
this.Shield = powerup;
if (powerup.Type == Powerup.PowerupType.Shrink && this.Shrink == null)
this.Shrink = powerup;
powerup.Collected = true;
// The powerup is activated if it is a shield
if (powerup.Type == Powerup.PowerupType.Shield)
{
powerup.Activated = true;
soundEngine.Shield.Play();
}
break;
}
}
}
public void Update(Vector3 direction, CollisionEngine collisionEngine,
SoundEngine soundEngine, ParticleEngine particleEngine,List<Asteroid> asteroids,
List<Powerup> powerups, MouseState originalMouseState, GameTime gameTime,
GraphicsDevice device)
{
if (this.Shrink != null)
{
if (this.Shrink.Activated)
{
this.Shrink.Update(gameTime);
if (this.Shrink.Timer <= 0)
{
this.Shrink = null;
this.BoundingSphere = new BoundingSphere(
this.Position, this.BoundingSphere.Radius / 0.25f);
soundEngine.Grow.Play();
}
else
{
this.BoundingSphere = new BoundingSphere(
this.Position, this.BoundingSphere.Radius * 0.25f);
}
}
}
CheckCollisions(collisionEngine, soundEngine, powerups, asteroids);
if (this.Destroyed)
{
if (this.Lives == 0)
return;
else
{
particleEngine.AddParticle(gameTime, this.Position);
UpdatePosition(new Vector3(0, 0, 0));
this.Destroyed = false;
this.Speed = 0f;
this.Velocity = Vector3.Zero;
this.Rotation = Quaternion.Identity;
}
}
ProcessKeyboard(direction, gameTime, soundEngine);
ProcessMouse(originalMouseState, gameTime, device);
}
private void CheckCollisions(CollisionEngine collisionEngine, SoundEngine soundEngine,
ParticleEngine particleEngine, GameTime gameTime, List<Asteroid> asteroids)
{
// Destroy the torpedo if it hits the edge of the universe
if (collisionEngine.CollidesWithEdge(this.Position, this.BoundingSphere))
{
if (soundEngine.Explosion.State != SoundState.Playing)
soundEngine.Explosion.Play();
this.Destroyed = true;
particleEngine.AddParticle(gameTime, this.Position);
}
// Destroy the torpedo if it hits an asteroid
foreach (Asteroid asteroid in asteroids)
{
if (collisionEngine.CollideTwoObjects(this.BoundingSphere, asteroid.BoundingSphere))
{
particleEngine.AddParticle(gameTime, this.Position);
this.Destroyed = true;
break;
}
}
}
public void Update(CollisionEngine collisionEngine, SoundEngine soundEngine,
ParticleEngine particleEngine, GameTime gameTime, List<Asteroid> asteroids)
{
CheckCollisions(collisionEngine, soundEngine, particleEngine, gameTime, asteroids);
float speed = VELOCITY_CONST / gameTime.ElapsedGameTime.Milliseconds;
Vector3 velocity = speed * this.Direction;
Vector3 newPos = this.Position + velocity;
UpdatePosition(newPos);
}
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
device = graphics.GraphicsDevice;
Mouse.SetPosition(device.Viewport.Width / 2, device.Viewport.Height / 2);
originalMouseState = Mouse.GetState();
billboardEffect = this.Content.Load<Effect>("Shaders/billboard_effect");
camera = new Camera(device);
lifeTexture = this.Content.Load<Texture2D>("Sprites/spaceship_sprite");
explosionParticleTexture = this.Content.Load<Texture2D>("Sprites/explosion_particle");
shieldSprite = this.Content.Load<Texture2D>("Sprites/power_up_shield");
shrinkSprite = this.Content.Load<Texture2D>("Sprites/power_up_shrink");
timeFont = Content.Load<SpriteFont>("Fonts/Courier New");
collisionEngine = new CollisionEngine();
particleEngine = new ParticleEngine(explosionParticleTexture, billboardEffect, device);
soundEngine = new SoundEngine(this.Content);
skybox = new Skybox();
skybox.LoadModel(this.Content, effect);
spaceship = new Spaceship();
spaceship.LoadModelAndTexture(this.Content, effect);
torpedoes = new List<Torpedo>();
powerups = new List<Powerup>();
LoadAsteroids();
}