/// <summary>
/// Updates the position of the dog, and plays sounds.
/// </summary>
public override void Update(GameTime gameTime, AudioManager audioManager)
{
// Set the entity to a fixed position.
Position = new Vector3(0, 0, -4000);
Forward = Vector3.Forward;
Up = Vector3.Up;
Velocity = Vector3.Zero;
// If the time delay has run out, start or stop the looping sound.
// This would normally go on forever, but we stop it after a six
// second delay, then start it up again after four more seconds.
timeDelay -= gameTime.ElapsedGameTime;
if (timeDelay < TimeSpan.Zero)
{
if (activeSound == null)
{
// If no sound is currently playing, trigger one.
activeSound = audioManager.Play3DSound("DogSound", true, this);
timeDelay += TimeSpan.FromSeconds(6);
}
else
{
// Otherwise stop the current sound.
activeSound.Stop(false);
activeSound = null;
timeDelay += TimeSpan.FromSeconds(4);
}
}
}
/// <summary>
/// Updates the position of the cat, and plays sounds.
/// </summary>
public override void Update(GameTime gameTime, AudioManager audioManager)
{
// Move the cat in a big circle.
double time = gameTime.TotalGameTime.TotalSeconds;
float dx = (float)-Math.Cos(time);
float dz = (float)-Math.Sin(time);
Vector3 newPosition = new Vector3(dx, 0, dz) * 6000;
// Update entity position and velocity.
Velocity = newPosition - Position;
Position = newPosition;
if (Velocity == Vector3.Zero)
Forward = Vector3.Forward;
else
Forward = Vector3.Normalize(Velocity);
Up = Vector3.Up;
// If the time delay has run out, trigger another single-shot sound.
timeDelay -= gameTime.ElapsedGameTime;
if (timeDelay < TimeSpan.Zero)
{
// For variety, randomly choose between three slightly different
// variants of the sound (CatSound0, CatSound1, and CatSound2).
string soundName = "CatSound" + random.Next(3);
audioManager.Play3DSound(soundName, false, this);
timeDelay += TimeSpan.FromSeconds(1.25f);
}
}
public Audio3DGame()
{
Content.RootDirectory = "Content";
graphics = new GraphicsDeviceManager(this);
audioManager = new AudioManager(this);
Components.Add(audioManager);
cat = new Cat();
dog = new Dog();
}
/// <summary> /// Updates the position of the entity, and allows it to play sounds. /// </summary> public abstract void Update(GameTime gameTime, AudioManager audioManager);
