Listening to the "Mouse Scroll Wheel"

Hello,

I need to listen to the mouse scroll view, and if the user scrolled up, increase the “Fire Power”. Following is my code.

using UnityEngine;
using System.Collections;

public class Shooter : MonoBehaviour {
	
	public Rigidbody bullet;
	public float power = 1500f;
	public float moveSpeed = 25f;

	
	// Update is called once per frame
	void Update () 
	{
		float h = Input.GetAxis("Horizontal") * Time.deltaTime * moveSpeed;
		float v = Input.GetAxis("Vertical") * Time.deltaTime * moveSpeed;
		
		transform.Translate(h,v,0);
		
		if(Input.GetButtonUp("Fire1"))
		{
			Rigidbody instance = Instantiate(bullet,transform.position,transform.rotation) as Rigidbody;
			
			Vector3 fwd = transform.TransformDirection(Vector3.forward);
			
			instance.AddForce(fwd*power);
		}
		else if(Input.GetButtonUp("Mouse ScrollWheel"))
		{
			power = power * 2;
		}
	
	}
}

But, this “MouseScrollWheel” part seems not working. What am I doing wrong?

Please help.

http://answers.unity3d.com/questions/13485/implementing-the-scrollwheel.html

I think it’s all here in this post

Input.GetAxis("Mouse ScrollWheel") in a nutshell

Must use GetAxis