Object Type Mismatch Error Dilema

Unity Engine
1

I’m getting the following error when I run my Unity project:

Here is an edited version of the code that it I believe it is refering to:

What I can’t figure out is what is causing the error.

It looks like Unity is telling me that the object declaration for “instantiatedProjectile” doesn’t match the instance parameters, but it is clearly a Rigidbody type in both. And, I can confirm that I have attached a Rigidbody (prefab) in the parameters panel.

So, what could be causing this error?

TIA, all!

2

Have you tried it with the variable declaration separate from the assignment to see if it works that way? i.e.

var instantiatedProjectile : Rigidbody;
instantiatedProjectile = Instantiate (projectile, transform.position, transform.rotation);
3

Are you sure you get the exception from the instantiate call?

4

lfrog: Thanks for the tip, but it didn’t change anything.

Joe: I put Debug.Log’s in a few places and it sure looks like it’s the instantiation that’s causing the error.

5

Can you post the full script.

6

Sure thing.

I’ve resisted the urge to clean it up so you can see the whole magillah. :wink:

var projectile : Rigidbody;  //  "projectilce" is a GameObject
//
var missileLife = 10.0;  //  destoy missile ten seconds after launch
var fireRate = 0.5;  //  wait half a second before alowing next missile launch
var initialSpeed = 20.0;
//
private var launcherOffset = 5;  //  missile up offset form launcher at launch
private var nextFire = 0.0;
//
var ammoCount;
var barGUIWidth;
var ammoStart = 20.0;
//
var barGUI : GUITexture;
var hudXTextureIndex = 0;
var hudXTexture1 : Texture2D;
var hudXTexture2 : Texture2D;




function Start ()
{
	ammoCount = ammoStart;  //  set ammo counter to start amount
	barGUIWidth = barGUI.pixelInset.width;
}



function Update () {
	
	//  fire processing
	
	if (Input.GetButton ("Fire1")  Time.time > nextFire) {

		//  reset fire timer
		nextFire = Time.time + fireRate;
		
		// create a new projectile, use the same position and rotation as the Launcher.
		//  var instantiatedProjectile : Rigidbody = Instantiate (projectile, transform.position, transform.rotation);
		var instantiatedProjectile : Rigidbody; 
		instantiatedProjectile = Instantiate (projectile, transform.position, transform.rotation); 
		
		// Give it an initial forward velocity. The direction is along the z-axis of the missile launcher's transform.
		//  instantiatedProjectile.velocity = transform.TransformDirection(Vector3 (0, 0, initialSpeed));

		// Ignore collisions between the missile and the character controller
		Physics.IgnoreCollision(instantiatedProjectile.collider, transform.root.collider);
			
		//  destroy this missile instance after a set time
        Destroy (instantiatedProjectile, missileLife);
   		
   		//  cycle texture index
   		hudXTextureIndex++;
   		if (hudXTextureIndex == 2) {hudXTextureIndex=0;}
   		//  Debug.Log(hudXTextureIndex);
   		
   		
   		//  update texture
        if (hudXTextureIndex == 1) {
        	barGUI.texture = hudXTexture1;
        	}
        else {
        	barGUI.texture = hudXTexture2;
        }
        
	}  //  end fire processing
	
}  //  end update
7

The script works fine for me. Try reassigning the projectile again in the inspector.

8

I already tried that. Repeatedly, in fact.

Tried closing and re-opening the Unity editor too.

All to no avil.

9

Solved! Although I’m not sure why …

I completely deleted all instances, reinstanced them, re-attached all scripts and now it works.

I guess my copy of Unity is being visited by Aunt Irma. :wink:

Thanks for your help, all!

10

‘resisted the urge’ :lol:

11

Try making a really simple scene with only a game object that has the script attached. and a cube with rigidbody that you then set to be the projectile.

Does that work?
With the script you posted, that worked fine for me.