修复三维地图楼层自动切换误触发

src/components/map/ThreeMap.vue

@@ -213,6 +213,7 @@ let modelLoadVersion = 0
 let pointerDownState: { x: number; y: number } | null = null
 let cachedOverviewModel: THREE.Object3D | null = null
 let cachedSharedModelUrl = ''
+let autoSwitchOverviewMaxDim = 0
 
 // 自动切换状态
 let isAutoSwitchLocked = false
@@ -933,6 +934,7 @@ const showFocusHallHighlight = (poi: RenderPoi) => {
 }
 
 const disposeCachedOverviewModel = () => {
+  autoSwitchOverviewMaxDim = 0
   if (!cachedOverviewModel) return
 
   disposeObject(cachedOverviewModel)
@@ -1159,6 +1161,15 @@ const getObjectSize = (object: THREE.Object3D) => (
   getObjectBox(object).getSize(new THREE.Vector3())
 )
 
+const getObjectMaxDim = (object: THREE.Object3D) => {
+  const size = getObjectSize(object)
+  return Math.max(size.x, size.y, size.z, 1)
+}
+
+const cacheAutoSwitchOverviewMaxDim = (model: THREE.Object3D) => {
+  autoSwitchOverviewMaxDim = getObjectMaxDim(model)
+}
+
 const getMultiFloorVerticalGap = (items: MultiFloorModelItem[]) => {
   const maxFloorHeight = Math.max(...items.map((item) => item.size.y), 1)
   const maxFootprint = Math.max(...items.map((item) => Math.max(item.size.x, item.size.z)), 1)
@@ -1205,9 +1216,8 @@ const checkAutoSwitch = () => {
   // 获取当前距离
   const distance = controls.getDistance()
 
-  // 计算模型尺寸和阈值
-  const size = getObjectSize(activeModel)
-  const maxDim = Math.max(size.x, size.y, size.z, 1)
+  // 自动切换使用全馆稳定尺寸，避免单楼层可见性过滤压低 floor -> overview 阈值。
+  const maxDim = autoSwitchOverviewMaxDim || getObjectMaxDim(activeModel)
 
   const thresholdLow = maxDim * props.autoSwitchThresholdLow
   const thresholdHigh = maxDim * props.autoSwitchThresholdHigh
@@ -1388,6 +1398,7 @@ const loadOverview = async () => {
     activeModel = cachedOverviewModel
     activeModel.visible = true
     applyModelVisibilityForView(activeModel, 'overview')
+    cacheAutoSwitchOverviewMaxDim(activeModel)
     targetScene.add(activeModel)
     fitCameraToObject(activeModel)
     refreshPoiVisibilityByDistance()
@@ -1410,6 +1421,7 @@ const loadOverview = async () => {
   activeModel.name = 'GuideOverviewModel'
   prepareModel(activeModel)
   applyModelVisibilityForView(activeModel, 'overview')
+  cacheAutoSwitchOverviewMaxDim(activeModel)
   cachedOverviewModel = activeModel
   cachedSharedModelUrl = packageData.overviewModelUrl
   targetScene.add(activeModel)
@@ -1461,6 +1473,9 @@ const loadFloor = async (floorId: string) => {
     activeModel.name = `GuideFloorModel_${floor.floorId}`
     activeModel.userData.floorId = floor.floorId
     prepareModel(activeModel)
+    if (floor.sharedModelAsset) {
+      cacheAutoSwitchOverviewMaxDim(activeModel)
+    }
     applyModelVisibilityForView(activeModel, 'floor', floor.floorId)
     if (floor.sharedModelAsset) {
       cachedOverviewModel = activeModel