NLDClient-yudde/ProjectNLD/Assets/Code/Scripts/Gameplay/Map/CameraController.cs

using Gameplay;
using System;
using UnityEngine;


public class CameraController : MonoBehaviour
{
    public float leftMargin = 1.5f;

    public float rightMargin = 1.5f;

    public float topMargin = 0.9f;

    public float bottomMargin = 0.9f;

    public float moveSpeedX = 0.19f;

    public float moveSpeedY = 0.3f;

    public float unitPerPixel = 0.01f;

    public int CameraMinSize = 6;

    public int CameraMaxSize = 12;

    private const int CameraStartY = 25;

    private Vector3 cameraStartRotation = new Vector3(37.5f, -10f, 0f);

    private Vector3 cameraDefaultRotation = new Vector3(90, 0, 0);

    private const int CameraStartSize = 6;

    private const float NearClipPlane = 0.03f;

    private const float FarClipPlane = 60;

    private const bool IsOrthographic = true;

    private Camera mainCamera;

    private bool isIgnoreZoomLimit;

    public Map Map
    {
        get => map;
        set { map = value; }
    }

    private Map map;

    private void Awake()
    {
        mainCamera = GetComponent<Camera>();

        mainCamera.transform.SetPositionAndRotation(new Vector3(0, CameraStartY, 0),
            Quaternion.Euler(cameraStartRotation));

        mainCamera.orthographic = IsOrthographic;

        mainCamera.orthographicSize = CameraStartSize;

        mainCamera.nearClipPlane = NearClipPlane;

        mainCamera.farClipPlane = FarClipPlane;

        var endPosition = AdjustPosition(mainCamera.orthographicSize, out var canZoom);

        mainCamera.transform.position = endPosition;
    }

    private void OnEnable()
    {
        InputManager.Instance.OnFingerMove += OnFingerMove2;
        InputManager.Instance.OnFingersMove += OnFingersMove;
    }

    private void OnDisable()
    {
        InputManager.Instance.OnFingerMove -= OnFingerMove2;
        InputManager.Instance.OnFingersMove -= OnFingersMove;
    }

    private void OnFingerMove2(Vector2 delta)
    {
        var touchDeltaPosition = -delta;
        var ratio = mainCamera.orthographicSize * unitPerPixel;
        var cameraMove = new Vector2(touchDeltaPosition.x * moveSpeedX * ratio,
            touchDeltaPosition.y * moveSpeedY * ratio);

        var cameraTransform = transform;
        var moveY = cameraTransform.up;
        moveY.y = 0;
        moveY = moveY.normalized * cameraMove.y;

        var moveX = cameraTransform.right;
        moveX.y = 0;
        moveX = moveX.normalized * cameraMove.x;

        transform.Translate(moveX + moveY, Space.World);
        var endPosition = AdjustPosition(mainCamera.orthographicSize, out var canZoom);
        mainCamera.transform.position = endPosition;
    }
    
    private void OnFingersMove(float delta)
    {
        if (delta < 0)
        {
            var endPosition = AdjustPosition(mainCamera.orthographicSize + 1, out var canZoom);
            if ((canZoom && mainCamera.orthographicSize < CameraMaxSize) || isIgnoreZoomLimit)
            {
                mainCamera.orthographicSize++;
                mainCamera.transform.position = endPosition;
            }
        }
        else
        {
            if (mainCamera.orthographicSize > CameraMinSize)
            {
                mainCamera.orthographicSize--;
            }
        }
    }
    
    Vector3 CalculateHitHorizontalPosition(Vector3 startPosition, Vector3 dir, float y)
    {
        if (dir.y == 0)
            return Vector3.zero;

        var p1 = startPosition; // 直线上一点
        var v = dir; // 直线的方向向量
        float x, z;

        // 已知直线上一点 p1(x1, y1, z1) 和 直线的方向向量 v(m, n, p)
        // 根据点向式
        // (x - x1) / m = (y - y1) / n = (z - z1) / p
        // 有:
        // (x - p1.x) / v.x = (y - p1.y) / v.y = (z - p1.z) / v.z
        // 有:
        // x = p1.x + v.x * (y - p1.y) / v.y
        // z = p1.z + v.z * (y - p1.y) / v.y
        // 与平面 y = y 的交点坐标为

        x = p1.x + v.x * (y - p1.y) / v.y;
        z = p1.z + v.z * (y - p1.y) / v.y;
        return new Vector3(x, y, z);
    }
    
    public void InitializeCameraPosition(Vector2