Tz2/Assets/Framework/Scripts/Runtime/Engine/Engine.Camera/CameraControl/CameraControlComponent.cs

using DG.Tweening;
using UnityEngine;
using NaughtyAttributes;
using UnityEngine.EventSystems;

namespace Framework.Scripts.Runtime.Engine.Engine.Camera.CameraControl
{
    public class CameraControlComponent : ICameraController
    {
        public enum CameraEnum
        {
            TopView,
            FrontView
        }

        //相机跟随的目标物体，一般是一个空物体
        [SerializeField] private GameObject target;

        [HorizontalLine(color: EColor.Blue)] [SerializeField] [Label("启用旋转")]
        private bool enableMouseFunctions = true;

        [SerializeField] [Label("启用鼠标碰到UI禁用脚本")]
        private bool enableMouseOverUI = true;

        [SerializeField] private CameraEnum cameraEnum;

        private float middleSpeed = 2;

        private int MouseWheelSensitivity = 1; //滚轮灵敏度设置

        private int MouseZoomMin = 10; //相机距离最小值

        private int MouseZoomMax = 9999; //相机距离最大值

        private float xSpeed = 250.0f; //旋转视角时相机x轴转速

        private float ySpeed = 120.0f; //旋转视角时相机y轴转速

        private float Distance = 20; //相机和target之间的距离，因为相机的Z轴总是指向target，也就是相机z轴方向上的距离

        //[BoxGroup("参数")][SerializeField][Label("角度最小限制")] private int yMinLimit = -360;
        //[BoxGroup("参数")][SerializeField][Label("角度最大限制")] private int yMaxLimit = 360;

        private Vector2 minMaxSlider;

        private float x = 0.0f; //存储相机的euler角
        private float y = 0.0f; //存储相机的euler角
        private Vector3 targetOnScreenPosition; //目标的屏幕坐标，第三个值为z轴距离

        private Quaternion storeRotation; //存储相机的姿态四元数
        private Vector3 CameraTargetPosition; //target的位置
        private Vector3 initPosition; //平移时用于存储平移的起点位置
        private Vector3 cameraX; //相机的x轴方向向量
        private Vector3 cameraY; //相机的y轴方向向量
        private Vector3 cameraZ; //相机的z轴方向向量

        private Vector3 initScreenPos; //中键刚按下时鼠标的屏幕坐标（第三个值其实没什么用）
        private Vector3 curScreenPos; //当前鼠标的屏幕坐标（第三个值其实没什么用）


        private Vector2 jilu;

        private Transform cameraTransform;

        public void Init(Transform cam, Transform target)
        {
            cameraTransform = cam;
            this.target = target.gameObject;

            cameraEnum = CameraEnum.FrontView;
            Vector3 angles = cameraTransform.eulerAngles;
            x = angles.y;
            y = angles.x;
            CameraTargetPosition = target.transform.position;

            Distance = Vector3.Distance(cameraTransform.position, target.transform.position);

            // 给摄像机一个初始的位置和角度
            SetCameraPositionAndRotation();
        }

        public void MoveTargetTo(Vector3 newPosition, float newfloat)
        {
            target.transform.DOMove(newPosition, 2).OnUpdate(() =>
                {
                    Vector3 mPosition = storeRotation * new Vector3(0.0F, 0.0F, -Distance) + target.transform.position;
                    cameraTransform.position = mPosition;
                    CameraTargetPosition = target.transform.position;
                }
            );
        }

        void SetCameraPositionAndRotation()
        {
            //Vector3 position = rotation * new Vector3(0.0f, 0.0f, -11) + target.transform.position;

            x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
            y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;

            y = ClampAngle(y, minMaxSlider.x, minMaxSlider.y);

            storeRotation = Quaternion.Euler(y, x, 0);
            var position = storeRotation * new Vector3(0.0f, 0.0f, -Distance) + CameraTargetPosition;

            cameraTransform.rotation = storeRotation;
            cameraTransform.position = position;
        }


        //将angle限制在min~max之间
        static float ClampAngle(float angle, float min, float max)
        {
            if (angle < -360)
                angle += 360;
            if (angle > 360)
                angle -= 360;
            return Mathf.Clamp(angle, min, max);
        }


        public GameObject GetTarget()
        {
            return target;
        }

        public void UpdateValue(Vector2 minMax)
        {
            minMaxSlider = minMax;
        }


        public void ControlCamera()
        {
            if (enableMouseOverUI)
            {
                if (EventSystem.current.IsPointerOverGameObject())
                {
                    return;
                }
            }

            if (enableMouseFunctions)
            {
                //鼠标右键旋转功能
                if (Input.GetMouseButton(1))
                {
                    //如果是顶视图，只能左右旋转，不能上下
                    if (cameraEnum == CameraEnum.FrontView)
                    {
                        x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
                        y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;

                        y = ClampAngle(y, minMaxSlider.x, minMaxSlider.y);

                        storeRotation = Quaternion.Euler(y, x, 0);
                        var position = storeRotation * new Vector3(0.0f, 0.0f, -Distance) + CameraTargetPosition;

                        Debug.Log(storeRotation);
                        cameraTransform.rotation = storeRotation;
                        cameraTransform.position = position;
                    }
                    else
                    {
                        x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
                        //y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;

                        //y = ClampAngle(y, minMaxSlider.x, minMaxSlider.y);

                        storeRotation = Quaternion.Euler(90, x, 0);
                        var position = storeRotation * new Vector3(0.0f, 0.0f, -Distance) + CameraTargetPosition;

                        cameraTransform.rotation = storeRotation;
                        cameraTransform.position = position;
                    }
                }
                else if (Input.GetAxis("Mouse ScrollWheel") != 0) //鼠标滚轮缩放功能
                {
                    if (Distance >= MouseZoomMin && Distance <= MouseZoomMax)
                    {
                        Distance -= Input.GetAxis("Mouse ScrollWheel") * MouseWheelSensitivity;
                    }

                    if (Distance < MouseZoomMin)
                    {
                        Distance = MouseZoomMin;
                    }

                    if (Distance > MouseZoomMax)
                    {
                        Distance = MouseZoomMax;
                    }

                    cameraTransform.position = storeRotation * new Vector3(0.0F, 0.0F, -Distance) + CameraTargetPosition;
                }

                //鼠标中键平移
                if (Input.GetMouseButtonDown(2))
                {
                    cameraX = cameraTransform.right;
                    cameraY = cameraTransform.up;
                    cameraZ = cameraTransform.forward;

                    initScreenPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, targetOnScreenPosition.z);
                    Debug.Log("downOnce");

                    //targetOnScreenPosition.z为目标物体到相机xmidbuttonDownPositiony平面的法线距离
                    if (UnityEngine.Camera.main != null) targetOnScreenPosition = UnityEngine.Camera.main.WorldToScreenPoint(CameraTargetPosition);
                    initPosition = CameraTargetPosition;
                }

                if (Input.GetMouseButton(2))
                {
                    curScreenPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, targetOnScreenPosition.z);
                    //0.01这个系数是控制平移的速度，要根据相机和目标物体的distance来灵活选择
                    Vector3 vv = initPosition - (0.01f * middleSpeed) * ((curScreenPos.x - initScreenPos.x) * cameraX +
                                                                         (curScreenPos.y - initScreenPos.y) * cameraY);
                    target.transform.position = new Vector3(vv.x, vv.y, vv.z);

                    //重新计算位置
                    Vector3 mPosition = storeRotation * new Vector3(0.0F, 0.0F, -Distance) + target.transform.position;
                    cameraTransform.position = mPosition;

                    // //用这个会让相机的平移变得更平滑，但是可能在你buttonup时未使相机移动到应到的位置，导致再进行旋转与缩放操作时出现短暂抖动
                    //transform.position=Vector3.Lerp(transform.position,mPosition,Time.deltaTime*moveSpeed);
                }

                if (Input.GetMouseButtonUp(2))
                {
                    Debug.Log("upOnce");
                    //平移结束把cameraTargetPosition的位置更新一下，不然会影响缩放与旋转功能
                    CameraTargetPosition = target.transform.position;
                }
            }
        }
    }
}