Adding variable to object

Questions & Answers
1

I have the following situation:

I use Unity Playground to create some sort of Asteroids for practicing my unity skills, which realy suck a lot.

I followed the “How to Start Making Games - Unity Playground (Beginner Friendly)” instructions so far and replicated the identical concept. There is a script called “DestroyForPointsAttribute.cs”

I edited it like follows. (more on that below)
using UnityEngine;
using System.Collections;

[AddComponentMenu("Playground/Attributes/Destroy For Points")]
public class DestroyForPointsAttribute : MonoBehaviour
{
	public int pointsWorth = 5;
	private UIScript userInterface;
  private int this.gameObject.healthPoints = 15;
	private void Start()
	{
		// Find the UI in the scene and store a reference for later use
		userInterface = GameObject.FindObjectOfType<UIScript>();
	}
	

	//This will create a dialog window asking for which dialog to add
	private void Reset()
	{
		Utils.Collider2DDialogWindow(this.gameObject, false);
	}
	
	//duplication of the following function to accomodate both trigger and non-trigger Colliders
	private void OnCollisionEnter2D(Collision2D collisionData)
	{
		OnTriggerEnter2D(collisionData.collider);
	}

	// This function gets called everytime this object collides with another trigger
	private void OnTriggerEnter2D(Collider2D collisionData)
	{
		// is the other object a Bullet?
		if(collisionData.gameObject.CompareTag("Bullet"))
		{

       if(this.gameObject.healthPoints == null)
       {
        this.gameObject.healthPoints = 15;
       }
       this.gameObject.healthPoints -= 5;
       if (this.gameObject.healthPoints < 1)
       {
			 if(userInterface != null)
			 {
				  // add one point
				  BulletAttribute b = collisionData.gameObject.GetComponent<BulletAttribute>();
				  if(b != null)
				  {
					 userInterface.AddPoints(b.playerId, pointsWorth);
				  }
				  else
				  {
					 Debug.Log("Use a BulletAttribute on one of the objects involved in the collision if you want one of the players to receive points for destroying the target.");
				  }
			 }
			 else
			 {
				  Debug.Log("There is no UI in the scene, hence points can't be displayed.");
			 }

			 // then destroy this object
			 Destroy(gameObject);
		  }
     }
	}
}

I tried:
private int this.gameObject.healthPoints = 15;
private int gameObject.healthPoints = 15;
public >the rest = the same<

As you already can see, I cannot wrap arount my head around the structure of this stuff. C# is killing me. This script is directly linked to the asteroid.

Usually the script will just destroy asteroid and the bullet stays and it gives the player 1 point or what ever was configured.

I want the object to have health, but somehow I cannot set the variable to the object (asteroid).

I do not realy get it. Why can I not just use those variables?

2

Hey I just saw this. Sorry for that no one has replied sooner.

I want to understand your problem, so where is the issue: You are trying to set the health point on the gameobject this script is attached to?

If that is the case, I’m not sure why you are using:

  private int  this.gameObject.healthPoints = 15;

Instead, it should be:

  private int healthPoints = 15;

  // likewise elsewhere in the script, 
  // you just reference healthPoints

  if ( healthPoints < 1)

You do not need the ‘this.gameObject’ because you want to set the health points in the script, not on the game object the script is a component of. The game object “owns” the script when you attach it. You should not want/need/ or even try to add a property to the gameobject itself.