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Question by everett24 · Jul 06, 2012 at 02:17 AM · errorgameobjectfloat

BCE0023 error

BCE0023: No appropriate version of 'UnityEngine.Mathf.SmoothDamp' for the argument list '(float, System.Object, float)' was found. I am getting this error from my script:

    var cameraObject : GameObject;
 var targetXRotation : float;
 var targetYRotation : float;
 var targetXRotationV : float;
 var targetYRotationV : float;
 var rotateSpeed : float = 0.2;
 var holdHeight : float = -0.2;
 var holdSide : float = 0.2;
 
 function Update () {
  transform.position = cameraObject.transform.position + (Quaternion.Euler(0,targetYRotation,0) * Vector3(holdSide, holdHeight, 0));
  targetXRotation = Mathf.SmoothDamp( targetXRotation, cameraObject.GetComponent(MouseLook).xRotation.targetXRotationV, rotateSpeed);
  targetYRotation = Mathf.SmoothDamp( targetYRotation, cameraObject.GetComponent(MouseLook).yRotation.targetYRotationV, rotateSpeed);
  
  transform.rotation = Quaternion.Euler(targetXRotation, targetYRotation,0);
 }

why is this?

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Answer by Brian Stone · Jul 06, 2012 at 03:58 AM

The error message tells you exactly why. Because targetXRotationV and targetYRotationV are "System.Object" references but SmoothDamp() expects them to be of type "float". This is documented.

http://docs.unity3d.com/Documentation/ScriptReference/Mathf.SmoothDamp.html

static function SmoothDamp (current : float, target : float, ref currentVelocity : float, smoothTime : float, maxSpeed : float = Mathf.Infinity, deltaTime : float = Time.deltaTime) : float

You need to look at what type those variables are and see if you can cast them to float. Simple as that.

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Answer by aldonaletto · Jul 06, 2012 at 02:57 AM

xRotation.targetXRotationV and yRotation.targetYRotationV don't exist in the original MouseLook.cs script - xRotation and yRotation are just float variables, thus they could not reference anything else.
Maybe you should use this instead:

 ...
 var mLook: MouseLook = cameraObject.GetComponent(MouseLook);
 targetXRotation = Mathf.SmoothDamp(targetXRotation, mLook.xRotation, rotateSpeed);
 targetYRotation = Mathf.SmoothDamp(targetYRotation, mLook.yRotation, rotateSpeed);
 ...

NOTE: This will only work if Axes = MouseXAndY in the MouseLook script instance - xRotation isn't used when MouseX or MouseY are selected.

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