Unity 2d Instantiate problems

[Matkenis]

hey, so im having this weird error: [B]Object reference not set to an instance of an object[/B]. Here's the script:

using UnityEngine;
using System.Collections;

public class AcidZombieControlls : MonoBehaviour {

public float X;
public float speed;
public bool paperStyle;
public bool scaleStyle;
private Transform myTransform;
public float moveSpeed;
public Transform target;
public Transform SpitAreaStart;
public Transform SpitAreaEnd;
public bool spotted = false;
Animator anim;
public Transform Acid;
public Transform AcidSpawnPos;
public bool ImFacingLeft;
public float timeBetweenShots = 5.0f;

void Start ()
{
X = transform.localScale.x;
anim = GetComponent <Animator> ();
InvokeRepeating("Spit", 1.0F, 2F);

}
void Spit()
{
[B]if(ImFacingLeft)
{
GameObject acid = Instantiate (Acid, AcidSpawnPos.position, AcidSpawnPos.transform.rotation) as GameObject;
acid.rigidbody2D.AddForce (Vector2.right * -200);
}

if(!ImFacingLeft)
{
GameObject acid = Instantiate (Acid, AcidSpawnPos.position, AcidSpawnPos.transform.rotation) as GameObject;
acid.rigidbody2D.AddForce (Vector2.right * 200);
}
[/B]
}

void Update ()
{
if(target.position.x < myTransform.position.x)
{
ImFacingLeft = true;
}
if(target.position.x > myTransform.position.x)
{
ImFacingLeft = false;
}

Vector3 oldEulers = myTransform.eulerAngles;

if (target.position.x < myTransform.position.x)
{
myTransform.position -= myTransform.right * moveSpeed * Time.deltaTime;
//We're checking inside a threshold so the object doesn't rapidly flip when even with the player.
if (target.position.x < myTransform.position.x-0.02f)
{
if (paperStyle)
{

oldEulers.y = Mathf.LerpAngle(oldEulers.y, 0, 0.25f);

}

else if (scaleStyle)

{

transform.localScale = new Vector3(-1, 1, 1);

}
else

{
oldEulers.y = 0;
}

}
}// player is left of enemy, move left
if (target.position.x > myTransform.position.x)
{
//If we're using either rotate style, transform.right will be relative.

if (scaleStyle && !paperStyle)

{
myTransform.position += myTransform.right * moveSpeed * Time.deltaTime;
}

else
{
myTransform.position -= myTransform.right * moveSpeed * Time.deltaTime;

}
//We're checking inside a threshold so the object doesn't rapidly flip when even with the player.

if (target.position.x > myTransform.position.x + 0.02f)
{
if (paperStyle)
{
oldEulers.y = Mathf.LerpAngle(oldEulers.y, 180, 0.25f);
}
else if (scaleStyle)

{

transform.localScale = new Vector3(1, 1, 1);
}
else
{
oldEulers.y = 180;
}
}
}// player is right of enemy, move right
transform.eulerAngles = oldEulers;

Raycasting();
Behaiviours();
}

void Raycasting()
{
Debug.DrawLine (SpitAreaStart.position, SpitAreaEnd.position, Color.green);
spotted = Physics2D.Linecast (SpitAreaStart.position, SpitAreaEnd.position, 1 << LayerMask.NameToLayer ("Player"));

if(spotted == true)
{
anim.SetBool ("Acid", true);
speed = 0;
}

if(!spotted)
{
anim.SetBool ("Acid", false);
speed = 0.1f;
}

}

void Behaiviours()
{
}

void Awake ()
{
myTransform = transform;

}

void FixedUpdate ()
{
float step = speed * Time.deltaTime;

transform.position = Vector3.MoveTowards(transform.position, target.position, step);

}
}

[Tamschi]

[QUOTE=Matkenis;44833768]hey, so im having this weird error: [B]Object reference not set to an instance of an object[/B]. Here's the script:

using UnityEngine;
using System.Collections;

public class AcidZombieControlls : MonoBehaviour {

	public float X;
	public float speed;
	public bool paperStyle;
	public bool scaleStyle;
	private Transform myTransform;
	public float moveSpeed;
	public Transform target;
	public Transform SpitAreaStart;
	public Transform SpitAreaEnd;
	public bool spotted = false;
	Animator anim;
	public Transform Acid;
	public Transform AcidSpawnPos;
	public bool ImFacingLeft;
	public float timeBetweenShots = 5.0f;

	void Start () 
	{
		X = transform.localScale.x;
		anim = GetComponent <Animator> ();
		InvokeRepeating("Spit", 1.0F, 2F);

	}
	void Spit()
	{
                // [B]
		if(ImFacingLeft)
		{
			GameObject acid = Instantiate (Acid, AcidSpawnPos.position, AcidSpawnPos.transform.rotation) as GameObject;
			acid.rigidbody2D.AddForce (Vector2.right * -200);
		}

		if(!ImFacingLeft)
		{
			GameObject acid = Instantiate (Acid, AcidSpawnPos.position, AcidSpawnPos.transform.rotation) as GameObject;
			acid.rigidbody2D.AddForce (Vector2.right * 200);
		}
                // [/B]
	}

	void Update () 
	{
		if(target.position.x < myTransform.position.x)
		{
			ImFacingLeft = true;
		}
		if(target.position.x > myTransform.position.x)
		{
			ImFacingLeft = false;
		}


			Vector3 oldEulers = myTransform.eulerAngles;
		
		if (target.position.x < myTransform.position.x)			
		{
			myTransform.position -= myTransform.right * moveSpeed * Time.deltaTime;
			//We're checking inside a threshold so the object doesn't rapidly flip when even with the player.			
			if (target.position.x < myTransform.position.x-0.02f)				
			{			
				if (paperStyle)				
				{
					
					oldEulers.y = Mathf.LerpAngle(oldEulers.y, 0, 0.25f);
					
				}
				
				else if (scaleStyle)
					
				{
					
					transform.localScale = new Vector3(-1, 1, 1);
					
				}
				else
					
				{
					oldEulers.y = 0;
				}
				
			}
		}// player is left of enemy, move left
		if (target.position.x > myTransform.position.x)	
		{	
			//If we're using either rotate style, transform.right will be relative.
			
			if (scaleStyle && !paperStyle)
				
			{
				myTransform.position += myTransform.right * moveSpeed * Time.deltaTime;
			}
			
			else
			{
				myTransform.position -= myTransform.right * moveSpeed * Time.deltaTime;
				
			}
			//We're checking inside a threshold so the object doesn't rapidly flip when even with the player.
			
			if (target.position.x > myTransform.position.x + 0.02f)
			{
				if (paperStyle)
				{
					oldEulers.y = Mathf.LerpAngle(oldEulers.y, 180, 0.25f);
				}
				else if (scaleStyle)
					
				{
					
					transform.localScale = new Vector3(1, 1, 1);
				}
				else
				{
					oldEulers.y = 180;
				}
			}
		}// player is right of enemy, move right    
		transform.eulerAngles = oldEulers;
		
		Raycasting();
		Behaiviours();
	}

	void Raycasting()
	{
		Debug.DrawLine (SpitAreaStart.position, SpitAreaEnd.position, Color.green);
		spotted = Physics2D.Linecast (SpitAreaStart.position, SpitAreaEnd.position, 1 << LayerMask.NameToLayer ("Player"));


		if(spotted == true)
		{
			anim.SetBool ("Acid", true);
			speed = 0;
		}

		if(!spotted)
		{
			anim.SetBool ("Acid", false);
			speed = 0.1f;
		}


	}

	void Behaiviours()
	{
	}

	void Awake ()
	{
		myTransform = transform;
		
	}

	void FixedUpdate () 
	{
		float step = speed * Time.deltaTime;
		
		transform.position = Vector3.MoveTowards(transform.position, target.position, step);
		
	}
}

[/QUOTE]

Use [noparse]

[/noparse] tags.

[editline]18th May 2014[/editline]

[b]bold[/b]
[editline]editline[/editline]

[editline]18th May 2014[/editline]

Oh wow, I never noticed :v:

[Ziks]

Do you get a line number with the error?

[editline]17th May 2014[/editline]

Or I guess it is at the bolded part.

[Tamschi]

I assume it's the use of

as

here, try with a normal cast and check if the conversion fails.

[Ziks]

Yep, looks like Acid is a transform rather than a GameObject and so the clone will become null after conversion.