直接复制贴脚本就行，我代码中的注释很详细
using UnityEngine;using System;using System.Collections;public class CameraController : MonoBehaviour{/// <summary>/// 是否能旋转X轴/// </summary>public bool canRotation_X = true;/// <summary>/// 是否能旋转Y轴/// </summary>public bool canRotation_Y = true;/// <summary>/// 是否能缩放/// </summary>public bool canScale = true;#region 属性/// <summary>/// 相机看向的目标/// </summary>public Transform target;/// <summary>/// 鼠标按钮，指针和滚轮的设置/// </summary>public MouseSettings mouseSettings = new MouseSettings(0, 10, 10);/// <summary>/// 角度范围限制/// </summary>public Range angleRange = new Range(-90, 90);/// <summary>/// 距离极限范围/// </summary>public Range distanceRange = new Range(0, 10);/// <summary>/// 平面上的矩形区域/// </summary>public PlaneArea PlaneArea = new PlaneArea();/// <summary>/// 摄像机对准目标/// </summary>public AlignTarget AlignTarget = new AlignTarget();/// <summary>/// 阻尼器可移动和旋转的范围./// </summary>[Range(0, 10)]public float damper = 5;/// <summary>/// 相机当前的角度./// </summary>public Vector2 CurrentAngles {protected set; get; }/// <summary>/// 相机到目标的当前距离./// </summary>public float CurrentDistance {protected set; get; }/// <summary>/// 相机目标角度./// </summary>protected Vector2 targetAngles;/// <summary>/// 相机到目标的距离/// </summary>protected float targetDistance;#endregion#region Protected Methodprotected virtual void Start(){CurrentAngles = targetAngles = transform.eulerAngles;CurrentDistance = targetDistance = Vector3.Distance(transform.position, target.position);}protected virtual void LateUpdate(){#if UNITY_EDITORAroundByMouseInput();#elif UNITY_STANDALONE_WINAroundByMobileInput();#elif UNITY_ANDROID || UNITY_IPHONEAroundByMobileInput();#endif}//记录上一次手机触摸位置判断用户是在左放大还是缩小手势 private Vector2 oldPosition1;private Vector2 oldPosition2;//是否单指操作private bool m_IsSingleFinger;/// <summary>/// 移动端（Win平板）/// </summary>protected void AroundByMobileInput(){if (Input.touchCount == 1){if (Input.touches[0].phase == TouchPhase.Moved){//手机端可调用此代码（window电脑只能获取鼠标不能获取触摸板）targetAngles.y += Input.GetAxis("Mouse X") * mouseSettings.pointerSensitivity;targetAngles.x -= Input.GetAxis("Mouse Y") * mouseSettings.pointerSensitivity;//window电脑可获取（移动端也可以使用）targetAngles.y += Input.touches[0].deltaPosition.x * Time.deltaTime * 5;targetAngles.x -= Input.touches[0].deltaPosition.y * Time.deltaTime * 5;//范围targetAngles.x = Mathf.Clamp(targetAngles.x, angleRange.min, angleRange.max);}//鼠标指针m_IsSingleFinger = true;}//鼠标滚轮if (canScale){if (Input.touchCount > 1){//计算出当前两点触摸点的位置 if (m_IsSingleFinger){oldPosition1 = Input.GetTouch(0).position;oldPosition2 = Input.GetTouch(1).position;}if (Input.touches[0].phase == TouchPhase.Moved && Input.touches[1].phase == TouchPhase.Moved){var tempPosition1 = Input.GetTouch(0).position;var tempPosition2 = Input.GetTouch(1).position;float currentTouchDistance = Vector3.Distance(tempPosition1, tempPosition2);float lastTouchDistance = Vector3.Distance(oldPosition1, oldPosition2);//计算上次和这次双指触摸之间的距离差距 //然后去更改摄像机的距离 targetDistance -= (currentTouchDistance - lastTouchDistance) * Time.deltaTime * mouseSettings.wheelSensitivity;//备份上一次触摸点的位置，用于对比 oldPosition1 = tempPosition1;oldPosition2 = tempPosition2;m_IsSingleFinger = false;}}}targetDistance = Mathf.Clamp(targetDistance, distanceRange.min, distanceRange.max);//缓动CurrentAngles = Vector2.Lerp(CurrentAngles, targetAngles, damper * Time.deltaTime);CurrentDistance = Mathf.Lerp(CurrentDistance, targetDistance, damper * Time.deltaTime);if (!canRotation_X) targetAngles.y = 0;if (!canRotation_Y) targetAngles.x = 0;//实时位置旋转transform.rotation = Quaternion.Euler(CurrentAngles);//实时位置移动transform.position = target.position - transform.forward * CurrentDistance;}/// <summary>/// 相机通过鼠标输入围绕目标/// </summary>protected void AroundByMouseInput(){if (Input.GetMouseButton(mouseSettings.mouseButtonID)){//鼠标指针targetAngles.y += Input.GetAxis("Mouse X") * mouseSettings.pointerSensitivity;targetAngles.x -= Input.GetAxis("Mouse Y") * mouseSettings.pointerSensitivity;//范围targetAngles.x = Mathf.Clamp(targetAngles.x, angleRange.min, angleRange.max);}//鼠标滚轮if (canScale){targetDistance -= Input.GetAxis("Mouse ScrollWheel") * mouseSettings.wheelSensitivity;}targetDistance = Mathf.Clamp(targetDistance, distanceRange.min, distanceRange.max);//缓动CurrentAngles = Vector2.Lerp(CurrentAngles, targetAngles, damper * Time.deltaTime);CurrentDistance = Mathf.Lerp(CurrentDistance, targetDistance, damper * Time.deltaTime);if (!canRotation_X) targetAngles.y = 0;if (!canRotation_Y) targetAngles.x = 0;//实时位置旋转transform.rotation = Quaternion.Euler(CurrentAngles);//实时位置移动transform.position = target.position - transform.forward * CurrentDistance;}#endregion}[Serializable]public struct MouseSettings{/// <summary>/// 鼠标按键的ID/// </summary>public int mouseButtonID;/// <summary>/// 鼠标指针的灵敏度./// </summary>public float pointerSensitivity;/// <summary>/// 鼠标滚轮的灵敏度/// </summary>public float wheelSensitivity;/// <summary>/// 构造函数/// </summary>/// <param name="mouseButtonID">鼠标按钮的ID</param>/// <param name="pointerSensitivity">鼠标指针的灵敏度</param>/// <param name="wheelSensitivity">鼠标滚轮的灵敏度</param>public MouseSettings(int mouseButtonID, float pointerSensitivity, float wheelSensitivity){this.mouseButtonID = mouseButtonID;this.pointerSensitivity = pointerSensitivity;this.wheelSensitivity = wheelSensitivity;}}/// <summary>/// 范围从最小到最大/// </summary>[Serializable]public struct Range{/// <summary>/// 范围的最小值/// </summary>public float min;/// <summary>/// 范围的最大值/// </summary>public float max;/// <summary>/// 构造函数/// </summary>/// <param name="min">范围的最小值</param>/// <param name="max">范围的最大值</param>public Range(float min, float max){this.min = min;this.max = max;}}/// <summary>/// 平面上的矩形区域/// </summary>[Serializable]public struct PlaneArea{/// <summary>/// 区域中心/// </summary>public Transform center;/// <summary>/// 区域宽度/// </summary>public float width;/// <summary>/// 区域长度/// </summary>public float length;/// <summary>/// 平面区域_构造函数/// </summary>/// <param name="center">区域中心</param>/// <param name="width">区域宽度</param>/// <param name="length">区域长度</param>public PlaneArea(Transform center, float width, float length){this.center = center;this.width = width;this.length = length;}}/// <summary>/// 摄像机对准目标/// </summary>[Serializable]public struct AlignTarget{/// <summary>/// 对准目标中心/// </summary>public Transform center;/// <summary>/// 对齐角度/// </summary>public Vector2 angles;/// <summary>/// 相机到目标中心的距离/// </summary>public float distance;/// <summary>/// 角度范围限制/// </summary>public Range angleRange;/// <summary>/// 距离范围限制/// </summary>public Range distanceRange;/// <summary>/// 对准目标_构造函数/// </summary>/// <param name="center">对准目标中心</param>/// <param name="angles">对齐角度</param>/// <param name="distance">相机到目标中心的距离</param>/// <param name="angleRange">角度范围限制</param>/// <param name="distanceRange">距离范围限制</param>public AlignTarget(Transform center, Vector2 angles, float distance, Range angleRange, Range distanceRange){this.center = center;this.angles = angles;this.distance = distance;this.angleRange = angleRange;this.distanceRange = distanceRange;}}
