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Question by Kaosaurus · Jul 15, 2013 at 01:19 PM · javascripterroranswer

Assets/Scripts/CarCameraScript.js(35,33) '+' Cannot be used with a left hand side of type 'float' and a right hand side of type 'UnityEngine.Vector3' Help?

 #pragma strict
 var car : Transform;
 var distance : float = 6.4;
 var height : float = 1.4;
 var rotationDamping : float = 3.0;
 var heightDamping : float = 2.0;
 var zoomRatio : float = 0.5;
 var DefaultFOV : float = 60;
 private var rotationVector : Vector3;
 function Start () {
 }
 
 function LateUpdate () {
 var wantedAngle = rotationVector.y;
 var wantedHeight = car.position.y + height;
 var myAngle = transform.eulerAngles.y;
 var myHeight = transform.position.y;
 myAngle = Mathf.LerpAngle(myAngle,wantedAngle,rotationDamping*Time.deltaTime);
 myHeight = Mathf.Lerp(myHeight,wantedHeight,heightDamping*Time.deltaTime);
 var currentRotation = Quaternion.Euler(0,myAngle,0);
 transform.position = car.position;
 transform.position -= currentRotation*Vector3.forward*distance;
 transform.position.y = myHeight;
 transform.LookAt(car);
 }
 function FixedUpdate (){
 var localVilocity = car.InverseTransformDirection(car.rigidbody.velocity);
 if (localVilocity.z<-0.5){
 rotationVector.y = car.eulerAngles.y + 180;
 }
 else {
 rotationVector.y = car.eulerAngles.y;
 }
 var acc = car.rigidbody.velocity;
 camera.fieldOfView = DefaultFOV + acc*zoomRatio;
 }
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avatar image InfiniBuzz · Jul 15, 2013 at 01:24 PM 1
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rigidbody.velocity is a Vector3. Assign one of the velocity's axes to acc.

 var acc = car.rigidbody.velocity.x;
 // or
 var acc = car.rigidbody.velocity.y;
 // or
 var acc = car.rigidbody.velocity.z;
 // or
 var acc = car.rigidbody.velocity.magnitude;


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Answer by EHogger · Jul 15, 2013 at 01:27 PM

The problem is exactly as the error message states. You can't add a float to a vector3.

 var DefaultFOV : float = 60; // <--- This is a float
 var acc = car.rigidbody.velocity; // <--- this is a vector3

 camera.fieldOfView = DefaultFOV + acc*zoomRatio; // <--- this line won't work.

You probably want to use car.rigidbody.velocity.magnitude instead.

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avatar image Kaosaurus · Jul 15, 2013 at 10:08 PM 0
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Thanks a Bunch!

avatar image EHogger · Jul 16, 2013 at 06:23 AM 0
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Accept? :)

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