第一人称<Rotate>

using UnityEngine;
using System.Collections;

public class Rotate : MonoBehaviour {

    public float  speedHor=4.0f;
    public float  speedVer=4.0f;

    public float minnumVer=-45f;
    public float maxnumVer=45f;

    public enum RotateAxes{
        MouseXAndY=0,
        MouseX=1,
        MouseY=2
    }
    public RotateAxes axes=RotateAxes.MouseX;

    private float _rotationX=0.0f;
    private float _rotationY=0.0f;
    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {
     // transform.Rotate(0,Input.GetAxis("Mouse Y")*speed,0,Space.Self);
        if(axes==RotateAxes.MouseX){
            //horizontal rotation here
            transform.Rotate(0,Input.GetAxis("Mouse X")*speedHor,0);
        }
        else if(axes==RotateAxes.MouseY){
            //vertical rotation here
            _rotationX -=Input.GetAxis("Mouse Y")*speedVer;
            _rotationX=Mathf.Clamp(_rotationX,minnumVer,maxnumVer);

            _rotationY=transform.localEulerAngles.y;

            transform.localEulerAngles=new Vector3(_rotationX,_rotationY,0);

        }
        else{
            //horizontal and vertical rotation here

        }
    }

}