Simple camera zoom function

Question

Hi everyone.

I have a camera in my game which is always on the same angle and following a player.

So, if I would want the camera to zoom in or out with mouse wheel, I would change its y and z values correspondingly.

I tried to code it up(started with c# few days ago, bear with me) and came up with this:

using UnityEngine; using System.Collections;

public class CameraControls : MonoBehaviour {

 public float zoomSpeed = 20;

 void Update () {

   float scroll = Input.GetAxis("Mouse ScrollWheel");
   if (scroll != 0.0f)
   {
       camera.transform.position.y += scroll*zoomSpeed;
       camera.transform.position.z += scroll*zoomSpeed;
   }

} }

but that doesn't seem to be the way to change the positions, what am I doing wrong here? Thanks in advance.

Answer 1

Best Answer

Answer by Bunny83 · Feb 26, 2011 at 01:28 PM

In C# position is a property. That means by accessing position you get a copy of the Vector3.
Use could use

transform.Translate(0,scroll*zoomSpeed,scroll*zoomSpeed,Space.World);

But normally to zoom in you just change the fov (field of view)

camera.fieldOfView += scroll*zoomSpeed;

or maybe:

camera.fieldOfView *= scroll*zoomSpeed;

ps. don't use camera.transform it's slower as transform

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Bablo · Feb 26, 2011 at 01:31 PM 0

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That clears it up, thanks. I already did it with fieldofview, but I didn't like it that way and as I have a fixed camera angle started working on this one.

Simple camera zoom function

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