Instantiating an object then destroy, errors about Type/Casting - C# iOS

Scripting C# & .NET
1

Hi,
I am having some issue with Instantiating bullets, making them move then destroying them. I did check the documentation/API and forums and it sounds easy, problem is even when I copy and paste code from documentation I get errors. Got a quick hint from the irc channel that the c# code on the documentation is incorrect, if that is the case it is a bit irritating, but it may be just me (probably doing something really stupid).

This code appears to work, it is a bare bone setup I can get to work, anything more useful that I try I get errors:

using UnityEngine;
using System.Collections;

public class SpawnProjectile : MonoBehaviour {
	
	
	public Transform projOne;		

	// Use this for initialization
	void Start () {			
	}
	
	// Update is called once per frame
	void Update () {		
		
		if (Input.touchCount > 0  Input.GetTouch(0).phase == TouchPhase.Began) 		
		{
			DestroyOldProj();
			SpawnProjOne();			
		}					
	}
	
	
	void DestroyOldProj()
	{
		Destroy(projOne.gameObject);						
	}
	
	
	void SpawnProjOne()
	{
		Instantiate(projOne, new Vector3(1.3f, 0.5f, 0f), Quaternion.identity);										
	}
}

the code above creates an instance of my bullet sphere at the correct coordinates. Destroy old one and creates new one when I touch the iPhone.

Problem/Intention
What I need is for this sphere to travel on the terrain with an inpulse/force and I will want to indeed destroy it when I shoot a new bullet-sphere.
I would actually prefer to create a new variable that will be = Instantiate… etc
so I can do stuff with the newly named clone

Problem is that if I follow the documentation/examples, etc… all I get is errors for example if I follow the code from this Reference Page http://unity3d.com/support/documentation/ScriptReference/Object.Instantiate.html

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Rigidbody projectile;
    void Update() {
        if (Input.GetButtonDown("Fire1")) {
            Rigidbody clone;
            clone = Instantiate(projectile, transform.position, transform.rotation);
            clone.velocity = transform.TransformDirection(Vector3.forward * 10);
        }
    }
}

or any other from here http://unity3d.com/support/documentation/Manual/Instantiating%20Prefabs.html

I get errors of the type
"Cannot implicitly convert type ‘UnityEngine.Object’ to UnityEngine.Rigidbody’. An explicit conversion exists (are you missing a cast?)
I get similar messages if I try to work with Transforms or Rigidbody and any other example I see on docs or forums (even if most forum posts are about UnityScript no c#)

So is there a problem with docs examples, new version of Unity?
What I am trying to do is create a clone-sphere that rolls on the ground in a way that I can access this clone/do things to it (add particles, physics based movement, work with its position, etc…) But I need to get rid of these errors first

Any help/samples/ideas?

Thank you

2

Yes, the documentation has errors. This often stems from the fact that it was written in JavaScript, and then run through some sort of conversion for 3.0. If you find them, report bugs. For now, you just need to know that, as the documentation says, Object.Instantiate returns an Object. However, you can turn that object back to what it was stored as.

clone = Instantiate(projectile, transform.position, transform.rotation) as Rigidbody;

Also, the JavaScript code won’t compile for iOS. Using #pragma strict would display that for you.

3

thank you Jessy, you did steer me in the right direction.
No idea about JavaScript indeed, I am learning and only using c# at the moment

Cheers

4

good, made a couple of tests having the instance as a Rigidbody or as a GameObject and I can get it to create instances and destroy them as required.

Issue I have now is that I tried with AddForce, AddRelativeForce, but I can’t get the instance to move forward when it spawns.