MouseWheel

Unity Engine
1

Hi!

i am modifying the std mouseorbit script to allow it to zoom in and out with the mouse wheel. I am using the following code to increase/decrease the distance of the camera, but it doesn’t seem to do anything.

distance += Input.GetAxis("Mouse ScrollWheel");
2

You always have to set up your input axis before it will work. here is how: <link removed by mod as it’s now a website for cannabis after a decade or so>

It looks like there isn’t a way to get input from a mouse scroll wheel right now unless it is counted as a mouse button.

3

Yes, the scroll wheel is actually just two extra mouse buttons disguised as a wheel… buttons 4 and 5 if I’m not wrong.

4

Well, I can’t get it to work. Has someone here tried to implement that already?
I have mapped the Element 11 with:
Name: Zoom In
Negative Button: mouse 4
Positive Button: mouse 5
Gravity: 1000 ?
Dead: 0
Sensitivity: 1
Type: Key / Mouse Button
Axis: X axis

Here is my script:

function LateUpdate () {
    if (target) {
        x += Input.GetAxis("Horizontal") * xSpeed * 0.02;
        y -= Input.GetAxis("Vertical") * ySpeed * 0.02;
        distance += Input.GetAxis("Zoom In"); // this is where I am trying to get mouse the wheel working 
 		
 		y = ClampAngle(y, yMinLimit, yMaxLimit);
 		distance = Mathf.Clamp(distance, minDistance, maxDistance);
 		       
        var rotation = Quaternion.EulerAngles(y * Mathf.Deg2Rad, x * Mathf.Deg2Rad, 0);
        var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
        
        transform.rotation = rotation;
        transform.position = position;
    }
}
5

Are you using Unity 1.2.2?

In Unity 1.2.2 we added mouse wheel support and it was added to the default input settings. What might have happened is that the project was created with a previous version, so that the Input Settings didn’t have that axis setup.

In that case juse select Edit → Project Settings → Input

and in the inspectors titlebar choose Reset.

That will give you the default input settings which include mouse wheel support when using

Input.GetAxis("Mouse ScrollWheel")
6

Yes, I am using 1.2.2. and I have reset the input settings, but still nothing. The interesting part of the script looks like this:

function LateUpdate () {
    if (target) {
        x += Input.GetAxis("Horizontal") * xSpeed * 0.02;
        y -= Input.GetAxis("Vertical") * ySpeed * 0.02;
        distance += Input.GetAxis("Mouse ScrollWheel") * 300;
 		
 		y = ClampAngle(y, yMinLimit, yMaxLimit);
 		distance = Mathf.Clamp(distance, minDistance, maxDistance);
 		       
        var rotation = Quaternion.EulerAngles(y * Mathf.Deg2Rad, x * Mathf.Deg2Rad, 0);
        var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
        
        transform.rotation = rotation;
        transform.position = position;
    }
}

Could it be problematic that I am running unity on an intel iMac? I am asking this also because unity keeps crashing if I do something wrong in the scripts. My guess is that normally unity shouldn’t crash if you mess with scripts, right?

7

I’m looking to accomplish something similar for my zoom controls; were you ever able to get this worked out?

8

My game has mouse wheel zooming (and I find the response for each wheel click to be about 1/8, compared to 1.0 for a keypress, so I had to compensate for that).

Input.GetAxis(“Mouse ScrollWheel”) worked fine for me. (Unity 1.2 and 1.5.)

Re Intel Macs - my wheel zoom works on them too.

Re script crashing: my G4 will do that sometimes too. Luckily it shows an error message leading to the solution, and I’ve never lost any data, but Unity will occasionally exit from a bad script (and this might have stopped with 1.5 but I’m not sure). I fix the script before I run the game again and I’m OK.

9

That did it. Thanks.

10

The problem why my mousewheel didn’t work was because I use usb overdrive to program my mouse. If I disable it, everything works just fine.