Real Simple Inventory and Vendor System Help

Questions & Answers
1

Ok so i’m trying to create a very simple inventory and vendor system using the scripts below. Right now, i’m stuck at the point where i want to just click on an item from the vendor window and then the GUI button of this item disappears from him and appears in the player’s inventory. I tried to use the “GetComponent” method which i’ve used successfully on other scripts but with no luck. Is there any other way to do such a thing? Of course, i’d love to have a drag-and-drop system but that’s a little more advanced than what i want right now. Thanks!

Vendor Script.js

var range : float;
var player : GameObject;

var close : boolean = false;
var vendorwindow : boolean = false;

function OnMouseOver(){
	if((Input.GetMouseButtonDown(0)) && close){
		vendorwindow = true;
	}	
}

function Update(){
	if(Vector3.Distance(player.transform.position, transform.position)<=range){
		close = true;
	}	
	else{
		close = false;
		vendorwindow = false;
	}
}

function OnGUI(){
	if(vendorwindow){
		GUI.Box(new Rect(20,10,160,160), "SHOP");
		
		if(GUI.Button(new Rect(40,40,50,40),"Sword")){
			Debug.Log("I bought a sword!");
		}
		if(GUI.Button(new Rect(40,90,50,40),"Shield")){
			Debug.Log("I bought a shield!");
		}
		if(GUI.Button(new Rect(110,40,50,40),"Bow")){
			Debug.Log("I bought a bow!");
		}
		if(GUI.Button(new Rect(110,90,50,40),"Arrows")){
			Debug.Log("I bought some arrows!");
		}	
	}
}

Player Inventory.js

var openINV : boolean = false;

function Update(){
	if(Input.GetKeyDown(KeyCode.I)){
		openINV = !openINV;
	}	
}

function OnGUI(){
	if(openINV){
		GUI.Box(new Rect(Screen.width - 180,Screen.height - 180,160,160),"INVENTORY");
		
		GUI.Box(new Rect(Screen.width - 160,Screen.height - 150,50,40),"");
		GUI.Box(new Rect(Screen.width - 160,Screen.height - 100,50,40),"");
		GUI.Box(new Rect(Screen.width - 90,Screen.height - 150,50,40),"");
		GUI.Box(new Rect(Screen.width - 90,Screen.height - 100,50,40),"");
	}
}
2

Edit : Just noted your answer was in JS. I don’t know shit about JS, but it should be easy to translate.

You should have a class named item that looks like this :

public class Item {
    private string _name;
    public string name {
        get { return _name; }
    }
    
    public Item(string name) {
        if(string.IsNullOrEmpty (name)) {
            throw new System.ArgumentNullException("name");
        }

        _name = name;
    }

    public void OnItemBought () {
        Debug.Log (string.Format "You bought a {0}!", _name);
    }
}

Then, you’d need to have a vendor and an inventory class who both has a list of items :

List<Item> items = new List<Item>();

After the vendor list has been initialized i.e. every item it can sell has been added to its item list. You’d be able to display dynamically the list with a function that looks something like :

for(int i = 0; i < vendor.items.Count; i++) {
    if(GUIButton(new Rect(40, 40 + 50*i, 50, 40), vendor.items*.name)) {*

inventory.Add (vendor.items*);*
vendor.items*.OnItemBought ();*
vendor.items.RemoveAt (i–);
}
}
The code won’t work as is. It’s up to you to apply this concept to your specific environment