Unity3D实现鼠标控制视角转动

前面，学了物体的移动功能，现在来学一下C#实现鼠标控制摄像机(视角)移动。

代码如下：

C#脚本(在Unity 5.5.1 下能运行)：

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

public class MouseView : MonoBehaviour {

 public enum RotationAxes
 {
  MouseXAndY = 0,
  MouseX = 1,
  MouseY = 2
 }

 public RotationAxes m_axes = RotationAxes.MouseXAndY;
 public float m_sensitivityX = 10f;
 public float m_sensitivityY = 10f;

 // 水平方向的 镜头转向
 public float m_minimumX = -360f;
 public float m_maximumX = 360f;
 // 垂直方向的 镜头转向 (这里给个限度 最大仰角为45°)
 public float m_minimumY = -45f;
 public float m_maximumY = 45f;

 float m_rotationY = 0f;

 // Use this for initialization
 void Start () {
  // 防止 刚体影响 镜头旋转
  if (GetComponent<Rigidbody>()) {
   GetComponent<Rigidbody> ().freezeRotation = true;
  }
 }

 // Update is called once per frame
 void Update () {
  if (m_axes == RotationAxes.MouseXAndY) {
   float m_rotationX = transform.localEulerAngles.y + Input.GetAxis ("Mouse X") * m_sensitivityX;
   m_rotationY += Input.GetAxis ("Mouse Y") * m_sensitivityY;
   m_rotationY = Mathf.Clamp (m_rotationY, m_minimumY, m_maximumY);

   transform.localEulerAngles = new Vector3 (-m_rotationY, m_rotationX, 0);
  } else if (m_axes == RotationAxes.MouseX) {
   transform.Rotate (0, Input.GetAxis ("Mouse X") * m_sensitivityX, 0);
  } else {
   m_rotationY += Input.GetAxis ("Mouse Y") * m_sensitivityY;
   m_rotationY = Mathf.Clamp (m_rotationY, m_minimumY, m_maximumY);

   transform.localEulerAngles = new Vector3 (-m_rotationY, transform.localEulerAngles.y, 0);
  }
 }
}

调用时，只需把该脚本绑定给物体即可。这里是绑定摄像机，以摄像机为第一人称视角转动。

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