Step 8: SFX

• Lastly, we'll add a couple sounds.
• Get a sound for when the player walks (player_walk.wav) and a sound for when a bullet hits the player (player_die.wav) and add them to a new Resources/sounds/ folder.
• Create a Sound variable (_walkSound) in Player.cs, then override OnAudioLoaded and save the loaded sfx:

protected override void OnLoadAudio(Audio audio)
{
    _walkSound = audio.GetSound("Resources", "sounds", "player_walk");
}

• Add some logic to Player's update method so the sound plays while walking:

// play a sound when our animation frame changes while walking
if(!_moveAxis.IsZero)
{
    if(_walkAnim.Frame == 0 && _currentAnimFrame == 1)
        Stage.Audio.Play(_walkSound, 0.0f, 1.0f, 1.0f);

    _currentAnimFrame = _walkAnim.Frame;
}

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• In GameStage.cs, load the new variable _playerDieSound in the OnEnter method:

_playerDieSound = Audio.GetSound("Resources", "sounds", "player_die");

• and play it when the player dies:

// check distance from each bullet to the player
float distSqr = (bullet.Position - _player.Position).LengthSquared;
if(distSqr < 140.0f)
{
    // play death sound
    Audio.Play(_playerDieSound, 0.0f, 1.0f, 1.0f);

    // restart game
    Game.SetStage(new TitleStage(Game));
}

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