Crash Sound

Death Effect Prefab

When the player crashes, we spawn a little animation.
To save us time, I’ve already set that up for you using the same techniques we had in the previous lab. Crash In “Bird.cs”, take a look at the Die() function.

    public void Die()
    {
        if (null != m_deathEffect)
        {
            GameObject obj = Instantiate(m_deathEffect);
            obj.transform.position = transform.position;
        }
        Destroy(gameObject);
    }

That m_deathEffect is a prefab that contains this animation.
All we need to do is add a sound to it.

  • Open the “Assets/Prefabs/Explosion.prefab”
  • Drag “Assets/Sounds/BirdDeath.wav” onto that prefab

Randomize the Sound

Let’s get some random variation into the sound.
Find the TODO in SimpleAnim.Start()

    void Start()
    {
        m_anim = GetComponent<Animator>();
        m_audio = GetComponent<AudioSource>();
        if (null != m_anim)
        {
            m_anim.speed = Random.Range(m_minSpeed, m_maxSpeed);
        }
        transform.localScale = Random.Range(m_minScale, m_maxScale) * Vector3.one;
        if (m_randomRotate)
        {
            transform.localEulerAngles = new Vector3(0.0f, 0.0f, Random.Range(0.0f, 360.0f));
        }
        {   // TODO randomize the volume and pitch of m_audio if there is one
        }
        StartCoroutine(DeleteWhenDone());
    }
  • If m_audio is null, just skip it
  • Otherwise, use Random.Range() to set the volume between m_minVolume and m_maxVolume
  • Randomize the pitch between m_minPitch and m_maxPitch

DeleteWhenDone()

One of the main jobs of SimpleAnim is to delete the object when the animation is finished.
What if the animation finshes, but the sound is still going?
We need to wait until both the animation and the sound have finished.
Find the TODO in SimpleAnim.DeleteWhenDone()

    IEnumerator DeleteWhenDone()
    {
        if (null != m_anim)
        {
            var state = m_anim.GetCurrentAnimatorStateInfo(0);
            yield return new WaitForSeconds(state.length * state.speed);
        }
        {   // TODO yield until the m_audio is finished playing
        }
        Destroy(gameObject);
    }
  • If m_audio is null, just skip it
  • Otherwise, use m_audio.isPlaying to yield until the sound is finished
    • We’re talking about a while loop here.

Now when you crash, you should hear the bird squawk sound.

Flapping Sound

Bird.cs

Let’s add a flapping sound.

  • At the top of “Bird.cs”, add a new public variable of type AudioSource
    • Call your variable m_flapSound
  • In Bird.Update() find the TODO 
      protected virtual void Update()
  {
      Vector3 pos = transform.position;
      if (m_flap)
      {
          m_ySpeed += m_flapBoost;
          {   //TODO play the flap sound
          }
      }
      ...
  }
  • If the flap sound is not null, call .Play() on it

The sound is a variable of type AudioSource.
We might say we are calling the function AudioSource.Play().
That is NOT a static function, so we wouldn’t literally type “AudioSource.Play()”. You would put [your variable name].Play()

Player Prefab

  • Open “Assets/Prefabs/Penguin.prefab”
  • Drag “Assets/Sounds/joustfla.wav” onto it to add an AudioSource
    • Uncheck the “Play On Awake” flag. We only want it to play when we flap
  • Drag that AudioSource into the m_flapSound slot of the PlayerBird component

Try out the flap sound.
It should play and repeat every time you flap your wings.

If you don’t commit and push, you might lose all your work if anything goes wrong.