Passing arguments to a script

Unity Engine
1

I am attempting to recreate a specific function from Game Maker called instance_create.

The original works in the following manner
instance_create(position_x, position_y, object_name);

which creates an object (clone of a prefab in Unity) at a specific x and y location in a 2d game.

I’ll sort out the details later, but how would I create the C# script in such a way as to accept the arguments in a single line as written? It doesn’t have to be specific to this case, I just need to know how to do it so I can make other scripts in a similar fashion as well, meaning I am able to just type

script_name(arg1, arg2, arg3, etc);

And have it carry out its function.

2

In a single line, you could do this by making a function that takes those parameters. You could make it a static function so it’s available anywhere.

//in the class SomeClass.cs
public static GameObject instance_create(float x, float y, string object_name) {
GameObject spawned = Instantiate<GameObject>(somePrefab);
spawned.transform.position = new Vector3(x, y, 0f);
spawned.name = object_name;
return spawned;
}

//anywhere else
SomeClass.instance_create(1f, 2f, "foobar");
2 Likes
3

That looks exactly like what I need. Time to test it out. Thanks!

4

Also note you probably want to make SomeClass static as well. That way there is just one copy of it, you don’t have to instantiate. Its often useful to make a static Tools class with some static methods you use in various places.

5

I’ve modified it as so, so I can pass the prefab name to the function. So far so good. How would I make the whole thing static?

I added “static” in between “public” and “class GM” and get an error, “Static class ‘GM’ cannot derive from type ‘MonoBehavior’. Static classes must derive from object”

Also, can I remove the void Start and void Update, as they will not be used?

public class GM : MonoBehaviour {
  public static GameObject instance_create(float x, float y, string object_name)
  {
  GameObject spawned = (GameObject)Instantiate(Resources.Load(object_name));
  spawned.transform.position = new Vector3(x, y, 0f);
  spawned.name = object_name;
  return spawned;
  }
  // Use this for initialization
  void Start () {
   
   }
 
   // Update is called once per frame
   void Update () {
   
   }
}