Expandable Item Classes ch 3 Richard Gesick

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

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; Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley

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;

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

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

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

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

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