Changing a variable

Unity Engine
1

So i’m working on a game where we have you lay down tiles and objects in the game to help get through the level. Right now we’re experimenting with having a couple GUItextures along the side of the screen, each with a script tied to them and having a single instantiation script that they talk to. Then when you click on the GUI’s on the side it will change the variable in the instantiation script, I.E. changes from instantiating cubes to spheres, and so then you can lay an object to guide you or one to clear a path. Now i used a debug log in an update function in the instantiation script to tell me what the variable was. The problem was the variable was changing in the inspector when I looked at it, but the Log kept telling me the same object, so like the variable on the object with the instantiation script would cycle: cube,sphere, cylinder, but it would only tell me the variable was cube the whole time in game. Aside from only telling me the object didn’t change, the object that was instantiated stayed the same. But when I would stop the game and restart it, whatever object it ended on, say cube, would be the new variable and would only instantiate that the whole time until you stop it again.

using UnityEngine;
using System.Collections;

public class Instantiator : MonoBehaviour 
{

	public Transform Cheese;
	public Transform Location;
	private Button1 button1;
	private Button2 button2;
	private Button3 button3;

	void Start()
	{
		button1 = GameObject.FindGameObjectWithTag("Button1").GetComponent<Button1>();
		button2 = GameObject.FindGameObjectWithTag("Button2").GetComponent<Button2>();
		button3 = GameObject.FindGameObjectWithTag("Button3").GetComponent<Button3>(); 
	}

	void Update()
	{
		Debug.Log (Cheese);
	}

	void OnMouseDown()
	{
		Instantiate(Cheese, Location.position, Location.rotation);
		Debug.Log (Cheese);
	}

}

Now here’s the code I have to tell the instantiator to change the variable, there’s two others but they’re the exact same as this except being on different GUI’s so they’re a different “Button” and different variable for transform. The “CB” is merely my way of making it easy for Unity to access the object instead of using a “Find”. I dragged the object with the instantiation script into the “CB” slot so that’s where it looks immediately for the script.

using UnityEngine;
using System.Collections;

public class Button1 : MonoBehaviour 
{
	public Transform Cube;
	private Instantiator instantiator;
	public Transform CB;

	void Start () 
	{
		instantiator = CB.GetComponent<Instantiator>();
	}

	void OnMouseDown () 
	{
		instantiator.Cheese = Cube; 
	}

}
2

You have 3 nearly the same button-scripts, only difference in line 6 (public Transform Cube/Sphere/Cylinder)?
If all this scripts have a “private Instantiator instantiator” in line 7, you get 3 instances of your instantiator script. Each will work separately.
The first button will not switch the instantiator of the second and third inswtantiator.
I think you have to do it with a static variable in only one button script or do it by a “singelton class”.

3

Another thing: Why not use the Unity GUI?

Like:

private Transform CubeTransform;
private Transform SphereTransform;
private Transform Location;

// Draws 2 buttons, one for cube, one for sphere

void OnGUI() {

if (GUI.Button(Rect(10,10,50,50),“Cube Button”))
Instantiate(CubeTransform, Location.position, Location.rotation);

if (GUI.Button(Rect(10,70,50,30),“Sphere Button”))
Instantiate(SphereTransform, Location.position, Location.rotation);
}

4

Well the thing is that we’re using these GUI’s to talk to the instantiator, so we don’t want it instantiating every time you click them. Because the “Location” variable is a plane prefab so there’s a lot of them on the screen. Now i’m not very familiar with OnGUI but when I looked it up, it merely seemed like another way to make a GUI texture on the screen and not too much in the realm of interacting like we want.