Unity 4.x Game Development by Example Beginner's Guide

Time for action – declare a variable to store the Screen midpoint

1. Modify your Script so that it looks like this (you can get rid of the Debug.Log() function call):

     function Update () {
       var halfW : float = Screen.width/2;
       transform.position.x = (Input.mousePosition.x -halfW)/halfW;
     }

That code looks a lot cleaner. Not only is it easier to read, but we've knocked out some of those confusing brackets in the second line.

What just happened – we've gone too var

We've used the special var keyword to declare our variable (bucket). I chose the name halfW, which is short for "half width"—half the width of the screen. You can choose any name you like for a variable as long as it isn't a reserved Unity keyword, and it doesn't break any of the naming rules ...