unity3D 视角随鼠标移动MouseLook.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class mouselook : MonoBehaviour {
    //MouseLook.cs
    //无重力：放在人上MouseXAndY 
    //加重力： 人水平MouseX 摄像机垂直MouseY 原因：P39
    public enum RotationAxes
    {
        MouseXAndY=0,
        MouseX=1,
        MouseY=2
    }
    public RotationAxes axes = RotationAxes.MouseXAndY;
    public float speedV = 9.0f;
    public float speedH = 9.0f;
    public float maxhead = 45.0f;
    public float minhead = -45.0f;
    private float _rotationX = 0.0f;
    // Use this for initialization
    void Start () {
        Rigidbody body = GetComponent<Rigidbody>();
        if (body != null)  body.freezeRotation = true;//禁止旋转
	}
	
	// Update is called once per frame
	void Update () {
        if (axes == RotationAxes.MouseX) { transform.Rotate(0, Input.GetAxis("Mouse X")*speedH, 0); }
        if (axes == RotationAxes.MouseY) {
            _rotationX -= Input.GetAxis("Mouse Y")*speedV;
            _rotationX = Mathf.Clamp(_rotationX, minhead, maxhead);//限仰视俯视角度范围
            float _rotationY = transform.localEulerAngles.y;
            transform.localEulerAngles = new Vector3(_rotationX, _rotationY, 0);//设置旋转角度
   
        }
        if (axes == RotationAxes.MouseXAndY) {
            _rotationX -= Input.GetAxis("Mouse Y")*speedV;//注意是-=
            _rotationX = Mathf.Clamp(_rotationX, minhead, maxhead);//水平Verital
            float _rotationY = transform.localEulerAngles.y+ Input.GetAxis("Mouse X") * speedH;
            transform.localEulerAngles=new Vector3( _rotationX, _rotationY,0);
        }
	}
}