根据游戏类型的不一样，会需要各种各样的摄像机，下面将分享三种典型的摄像机类型：（1）地下城摄像机；（2）第三人称跟随摄像机；（3）鼠标控制旋转摄像机。将这些控制脚本拖动到场景的MainCamera上即可。
为了辅助测试，使用了下面的角色移动/旋转控制脚本：
using UnityEngine;
using System.Collections; public class Player : MonoBehaviour
{
public float movementSpeed = ;
public float turningSpeed = ; void Update()
{
float horizontal = Input.GetAxis("Horizontal") * turningSpeed * Time.deltaTime;
transform.Rotate(, horizontal, ); float vertical = Input.GetAxis("Vertical") * movementSpeed * Time.deltaTime;
transform.Translate(, , vertical);
} }
看向固定目标的Camera的基本实现，主要使用transform.LookAt函数来实现：
public class LookAtCamera : MonoBehaviour
{
public GameObject target = null; void LateUpdate()
{
if (target == null)
return; transform.LookAt(target.transform);
}
}
（1）地下城摄像机，就像暗黑3那样的，摄像机和角色保持固定距离和角度，摄像机不会绕着角色旋转：
public class DungeonCamera : MonoBehaviour
{
public GameObject target = null;
public Vector3 offset = Vector3.zero;
public float damping = ; void Start()
{
if (target == null)
return;
offset = transform.position - target.transform.position;
} void LateUpdate()
{
if (target == null)
return; Vector3 desiredPosition = target.transform.position + offset;
// 平滑变换过程，即不要立即变换
Vector3 position = Vector3.Lerp(transform.position, desiredPosition, Time.deltaTime * damping);
transform.position = position; // Camera始终看向目标
transform.LookAt(target.transform.position);
}
}
（2）第三人称跟随摄像机，比较典型的3D游戏摄像机，摄像机会绕着角色一起旋转：
public class FollowCamera : MonoBehaviour
{
public GameObject target = null;
public Vector3 offset = Vector3.zero;
public float damping = ; void Start()
{
if (target == null)
return;
offset = transform.position - target.transform.position;
} void LateUpdate()
{
float currentAngle = transform.eulerAngles.y;
float desireAngle = target.transform.eulerAngles.y;
// 平滑角度变换
float angle = Mathf.LerpAngle(currentAngle, desireAngle, Time.deltaTime * damping);
Quaternion rotation = Quaternion.Euler(, angle, ); transform.position = target.transform.position + (rotation * offset); transform.LookAt(target.transform);
}
}
（3）鼠标控制角色旋转摄像机，注意，鼠标控制旋转时不要做Lerp，因为鼠标控制需要精确，比如玩CS的时候，鼠标控制角色转动还要过程那还能玩吗
public class MouseAimCamera : MonoBehaviour
{
public GameObject target = null;
public Vector3 offset = Vector3.zero;
public float rotateSpeed = ; void Start()
{
offset = target.transform.position - transform.position;
} void LateUpdate()
{
// 根据鼠标左键旋转目标物体
float horizontal = Input.GetAxis("Mouse X") * rotateSpeed;
target.transform.Rotate(, horizontal, ); float desiredAngle = target.transform.eulerAngles.y;
Quaternion rotation = Quaternion.Euler(, desiredAngle, );
transform.position = target.transform.position - (rotation * offset); transform.LookAt(target.transform); }
}
参考：http://code.tutsplus.com/tutorials/unity3d-third-person-cameras--mobile-11230