Input.GetAxis 获取轴

// A very simplistic car driving on the x-z plane.
// 一个十分简单的在x-z平面的驾车例子
var speed : float = 10.0;
var rotationSpeed : float = 100.0;

function Update () {
    // Get the horizontal and vertical axis.
    //获取横向和纵向坐标轴
    // By default they are mapped to the arrow keys.
    //默认情况下他们关联到方向键上
    // The value is in the range -1 to 1
    //值的范围是在-1到1之间
    var translation : float = Input.GetAxis ("Vertical") * speed;
    var rotation : float = Input.GetAxis ("Horizontal") * rotationSpeed;

    // Make it move 10 meters per second instead of 10 meters per frame...
    // 使它每帧移动10米变为每秒移动10米...
    translation *= Time.deltaTime;
    rotation *= Time.deltaTime;

    // Move translation along the object‘s z-axis
    //沿着z轴平移对象
    transform.Translate (0, 0, translation);
    // Rotate around our y-axis
    //以我们的y轴为中心旋转
    transform.Rotate (0, rotation, 0);
}

// Performs a mouse look.
//执行一个鼠标观察
var horizontalSpeed : float = 2.0;
var verticalSpeed : float = 2.0;
function Update () {
    // Get the mouse delta. This is not in the range -1...1
    //获取鼠标增量，范围不在-1...1
    var h : float = horizontalSpeed * Input.GetAxis ("Mouse X");
    var v : float = verticalSpeed * Input.GetAxis ("Mouse Y");
    transform.Rotate (v, h, 0);
}