teaching machines

public void EnableJumping(bool isEnabled) {
  GetComponent<CharacterMotor>().jumping.enabled = isEnabled;
}

public bool CanJump() {
  return GetComponent<CharacterMotor>().jumping.enabled;
}

1. Place boat.
2. Add an empty on the shore near the boat.
3. Give it a sphere collider.
4. Make collider a trigger.
5. Add a script:

   private bool isNearBoat;
   private PlayerController player;
   public GUISkin skin;
   
   void Start() {
     player = GameObject.Find("Player").GetComponent<PlayerController>();
   }
   
   void OnGUI() {
     if (isNearBoat && !player.CanJump()) {
       GUI.Box(new Rect(10, Screen.height - 70, Screen.width - 20, 60), "You're too heavy laden to board the boat.", skin.box);
     }
   }
   
   void OnTriggerEnter(Collider collider) {
     isNearBoat = true;
   }
   
   void OnTriggerExit(Collider collider) {
     isNearBoat = false;
   }

6. Add GUI Skin in project panel.
7. Increase box font size.
8. Add script to empty.

1. Make a coin prefab, an empty with the model as a child.
2. Add a collider to the empty.
3. Make the collider a trigger.
4. Add a script to play the animation. Do we attach it to the parent or child? The parent. It’s easier to swap the child out with a different model that way.

   void OnTriggerEnter(Collider collider) {
     coin.animation.Play("dissipate");
     Destroy(gameObject, 2.0f);
   }

5. We need access to the child coin to get at the animation!

   private Transform coin;
   void Start() {
     coin = transform.Find("greedee_coin");
   }

6. Don’t play animation if already playing.

1. Add an Audio Source component to the coin prefab.
2. Generate a collect sound (sfxr).
3. Import audio file.
4. Set audio file as Audio Source’s audio clip.
5. Play in a script with:

   audio.Play();

1. Register player in CoinKiller.Start.
2. Disable jumping in OnTriggerEnter.

1. Try transforming it in Update to in front of the player.
2. Be disappointed.
3. Add a new layer named Overlay.
4. Add a second camera whose Culling Mask includes only Overlay, whose Depth is 1, and whose Clear Flags is Depth only.
5. Make it a child of the main camera. Switch to ortho, size 5 (a magic number).
6. Make the main camera Culling Mask not include Overlay.
7. On coin hit, change the layer of the coin and all it’s children:

   SetLayer(coin.gameObject, 8);
   
   static void SetLayer(GameObject gameObject,
                        int layer) {
     gameObject.layer = layer;
     foreach (Transform child in gameObject.transform) {
       SetLayer(child.gameObject, layer);
     }
   }

8. In Update, position the coin in front of the camera (all magic numbers):

   void Update() {
     if (isHit) {
       transform.position = player.transform.position + player.transform.forward * 3.0f + 8.0f * player.transform.right + -3.0f * player.transform.up;
     }
   }