1. Expandable Item Classes ch 3
Richard Gesick

2. Objectives Creating customizable classes for items
Learning how GameObjects can interact with each other through sending messages
Creating a Projectile item class
Utilizing a classification system for all objects to decide what they do
Using trigger-based collisions for the Melee and Projectile item classes
Using two types of movement for projectile items

3. Projectiles The first example:
GameObject instantiatedProjectile = Instantiate(bullet,
new Vector3(transform.position.x,
transform.position.y + 1,
transform.position.z + 1),
transform.rotation) as GameObject;
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4. Projectiles
GameObject instantiatedProjectile = Instantiate(shot, shotSpawn.position, shotSpawn.rotation) as GameObject; Destroy(instantiatedProjectile, 5f); Or GameObject go = GameObject.Find("shotspawn"); GameObject instantiatedProjectile = Instantiate(bullet, go.transform.position, go.transform.rotation) as GameObject;

5. KeyValuePair C# struct KeyValuePair<Tkey, Tval>
foreach( KeyValuePair<string, string> kvp in openWith ) {
Console.WriteLine("Key = {0}, Value = {1}",
kvp.Key, kvp.Value); }

6. More KeyValuePair
Uses parallel lists which is not normally a good idea but is probably the easiest way to handle this
List<KeyValuePair<int, string>> items = new List<KeyValuePair<int, string>>();
List<KeyValuePair<int, int>> itemCount = new List<KeyValuePair<int, int>>();
. . .
items.Add(new KeyValuePair<int, string>(i, invItems[i]));
itemCount.Add(new KeyValuePair<int, int>(i, 0));
Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley

7. Sending Messages
From a destroy by contact method void OnTriggerEnter(Collider col) { if (col.gameObject.name == "Eathan") col.gameObject.SendMessage("changeHealth", 10); Destroy(this.gameObject); } . . .
Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley

8. Triggers and actions void OnTriggerEnter(Collider col) {
switch(col.gameObject.tag)
case "Enemy":
if(meleeType != MeleeType.Potion)
break;
case "Environment":
if(meleeType == MeleeType.Potion)
break; }
Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley

9. Different movements
public MovementType moveType = MovementType.None; // reassigned in the inspector void Update() { switch(moveType) case MovementType.Basic: BasicMovement(); break; case MovementType.Drop: DropMovement(); break; }
Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley