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using UnityEngine;
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using UnityEngine.UI;
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using DG.Tweening;
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using TMPro;
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public class MouseFollowAndZoom : MonoBehaviour
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{
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public float parallaxEffectMultiplier = 0.1f;
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public Vector2 maxOffset = new Vector2(2f, 2f);
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public GameObject targetIndicator; // UI 目标框
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public TMP_Text targetNameText; // 显示目标名称的文本
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public Button exitZoomButton; // 退出缩放的按钮
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public float zoomInScale = 1.5f; // 缩放倍数
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public float zoomDuration = 1.0f; // 缩放持续时间（减慢）
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public Vector2 sceneBoundsMin; // 场景边界的左下角
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public Vector2 sceneBoundsMax; // 场景边界的右上角
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private Camera mainCamera;
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private Vector3 initialPosition;
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private Vector3 zoomedInPosition; // 保存缩放时的相机位置
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private bool isZoomedIn = false;
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private Transform currentTarget;
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void Start()
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{
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mainCamera = Camera.main;
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initialPosition = transform.position;
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targetIndicator.SetActive(false); // 初始时隐藏目标框
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exitZoomButton.gameObject.SetActive(false); // 初始时隐藏退出按钮
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exitZoomButton.onClick.AddListener(ExitZoom);
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}
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void Update()
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{
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if (isZoomedIn) return; // 如果已经缩放，不再更新位置
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HandleMouseMovement();
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HandleTargetIndicator();
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}
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void HandleMouseMovement()
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{
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// 获取鼠标位置
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Vector3 mousePosition = Input.mousePosition;
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Vector3 worldMousePosition = mainCamera.ScreenToWorldPoint(mousePosition);
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worldMousePosition.z = 0; // 确保 z 为 0
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// 计算偏移量并反向
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Vector3 offset = (mainCamera.transform.position - worldMousePosition) * parallaxEffectMultiplier;
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offset.x = Mathf.Clamp(offset.x, -maxOffset.x, maxOffset.x);
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offset.y = Mathf.Clamp(offset.y, -maxOffset.y, maxOffset.y);
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// 更新位置
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Vector3 targetPosition = initialPosition + offset;
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transform.DOMove(targetPosition, 0.2f).SetEase(Ease.OutSine);
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}
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void HandleTargetIndicator()
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{
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// 获取鼠标位置
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Vector3 mousePosition = Input.mousePosition;
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RaycastHit2D hit = Physics2D.Raycast(mainCamera.ScreenToWorldPoint(mousePosition), Vector2.zero);
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if (hit.collider != null && hit.collider.CompareTag("Target")) // 检查是否是目标 Sprite
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{
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targetIndicator.SetActive(true);
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BoxCollider2D boxCollider = hit.collider.GetComponent<BoxCollider2D>();
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if (boxCollider != null)
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{
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// 获取 BoxCollider2D 的大小和位置
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Vector3 boxCenter = boxCollider.bounds.center;
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Vector3 boxSize = boxCollider.bounds.size;
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// 转换为屏幕坐标
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Vector3 screenCenter = mainCamera.WorldToScreenPoint(boxCenter);
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Vector2 screenSize = mainCamera.WorldToScreenPoint(boxCenter + boxSize) - mainCamera.WorldToScreenPoint(boxCenter);
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// 设置目标框位置和大小
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RectTransform indicatorRectTransform = targetIndicator.GetComponent<RectTransform>();
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indicatorRectTransform.position = screenCenter;
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// 动画效果：先放大再缩小
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indicatorRectTransform.localScale = Vector3.one * 1.5f;
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indicatorRectTransform.DOScale(Vector3.one, 0.2f).SetEase(Ease.OutBounce);
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indicatorRectTransform.sizeDelta = screenSize;
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// 设置目标名称
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targetNameText.text = hit.collider.name;
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}
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// 点击目标框触发缩放
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if (Input.GetMouseButtonDown(0))
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{
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currentTarget = hit.collider.transform;
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ZoomIn();
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}
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}
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else
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{
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targetIndicator.SetActive(false);
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}
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}
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void ZoomIn()
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{
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isZoomedIn = true;
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targetIndicator.SetActive(false); // 隐藏目标框
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Vector3 targetPosition = currentTarget.position;
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targetPosition.z = -10; // 确保 Z 轴位置为 -10
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// 防止相机超出场景边界
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float cameraHalfHeight = mainCamera.orthographicSize;
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float cameraHalfWidth = cameraHalfHeight * mainCamera.aspect;
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targetPosition.x = Mathf.Clamp(targetPosition.x, sceneBoundsMin.x + cameraHalfWidth, sceneBoundsMax.x - cameraHalfWidth);
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targetPosition.y = Mathf.Clamp(targetPosition.y, sceneBoundsMin.y + cameraHalfHeight, sceneBoundsMax.y - cameraHalfHeight);
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// 动画效果：缩放相机
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mainCamera.transform.DOMove(targetPosition, zoomDuration).SetEase(Ease.OutExpo); // 使用更平滑的缓动
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mainCamera.DOOrthoSize(mainCamera.orthographicSize / zoomInScale, zoomDuration).SetEase(Ease.OutExpo).OnComplete(() =>
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{
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// 缩放结束后显示退出按钮
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ShowExitButton();
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});
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}
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void ShowExitButton()
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{
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// 设置按钮位置在目标上方
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Vector3 buttonPosition = currentTarget.position;
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buttonPosition.z = 0; // 确保 z 为 0
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buttonPosition.y += 1.0f; // 根据需要调整按钮的高度
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exitZoomButton.transform.position = mainCamera.WorldToScreenPoint(buttonPosition); // 将按钮位置设置为目标上方
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exitZoomButton.gameObject.SetActive(true); // 显示退出缩放按钮
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}
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void ExitZoom()
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{
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if (!isZoomedIn) return; // 如果没有缩放则直接返回
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isZoomedIn = false;
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targetIndicator.SetActive(false); // 确保在退出缩放时隐藏目标框
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exitZoomButton.gameObject.SetActive(false); // 隐藏退出缩放按钮
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// 计算目标缩放
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float targetOrthoSize = mainCamera.orthographicSize * zoomInScale;
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// 获取缩放时的目标位置
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Vector3 targetPosition = currentTarget.position;
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targetPosition.z = -10; // 确保 Z 轴位置为 -10
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// 确保目标位置在边界内
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float cameraHalfHeight = targetOrthoSize; // 使用目标缩放计算边界
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float cameraHalfWidth = cameraHalfHeight * mainCamera.aspect;
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targetPosition.x = Mathf.Clamp(targetPosition.x, sceneBoundsMin.x + cameraHalfWidth, sceneBoundsMax.x - cameraHalfWidth);
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targetPosition.y = Mathf.Clamp(targetPosition.y, sceneBoundsMin.y + cameraHalfHeight, sceneBoundsMax.y - cameraHalfHeight);
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// 动画效果：先缩放再移动
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Sequence zoomOutSequence = DOTween.Sequence();
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zoomOutSequence.Append(mainCamera.DOOrthoSize(targetOrthoSize, zoomDuration).SetEase(Ease.OutExpo));
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zoomOutSequence.Join(mainCamera.transform.DOMove(targetPosition, zoomDuration).SetEase(Ease.OutExpo));
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}
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void OnDrawGizmos()
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{
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// 设置 Gizmos 颜色
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Gizmos.color = Color.red;
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// 绘制场景边界
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Vector3 bottomLeft = new Vector3(sceneBoundsMin.x, sceneBoundsMin.y, 0);
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Vector3 topRight = new Vector3(sceneBoundsMax.x, sceneBoundsMax.y, 0);
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// 绘制边界框
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Gizmos.DrawLine(bottomLeft, new Vector3(bottomLeft.x, topRight.y, 0));
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Gizmos.DrawLine(bottomLeft, new Vector3(topRight.x, bottomLeft.y, 0));
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Gizmos.DrawLine(topRight, new Vector3(bottomLeft.x, topRight.y, 0));
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Gizmos.DrawLine(topRight, new Vector3(topRight.x, bottomLeft.y, 0));
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}
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}
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