diff --git a/src/core/Constract.ts b/src/core/Constract.ts
index b97c525..34d4c0a 100644
--- a/src/core/Constract.ts
+++ b/src/core/Constract.ts
@@ -10,6 +10,9 @@ export default Object.freeze({
   CursorModeLinkAdd: 'LinkAdd',
   CursorModeLinkAdd2: 'LinkAdd2',
 
+  Mode2D: '2D',
+  Mode3D: '3D',
+
   // 测量相关的光标模式
   CursorModeMeasure: 'measure',
   CursorModeWay: 'way',
@@ -17,4 +20,4 @@ export default Object.freeze({
 
   // 选择模式
   CursorModeSelectByRec: 'selectByRec'
-})
\ No newline at end of file
+})
diff --git a/src/core/ModelUtils.ts b/src/core/ModelUtils.ts
index 2fe0620..3abd3ec 100644
--- a/src/core/ModelUtils.ts
+++ b/src/core/ModelUtils.ts
@@ -100,6 +100,24 @@ export function getLineId(startId: string, endId: string, type: LinkType): strin
 }
 
 /**
+ * 获取某个 Object3D 先上查找最近的有效业务 Object3D
+ * @param object
+ */
+export function getClosestObject(object: THREE.Object3D) {
+  if (!object) {
+    return undefined
+  }
+  while (object) {
+    if (object.userData && object.userData.t && object.userData.entityId) {
+      // 找到第一个有效的业务 Object3D
+      return object
+    }
+    // 向上查找父级
+    object = object.parent
+  }
+}
+
+/**
  * 解析线条 ID, 返回 线条类型, 起点 ID 和终点 ID
  */
 export function parseLineId(lineId): [LinkType, string, string] {
@@ -434,4 +452,4 @@ function loadObject3DFromJson(items: ItemJson[]): THREE.Object3D[] {
   }
 
   return result
-}
\ No newline at end of file
+}
diff --git a/src/core/base/BaseRenderer.ts b/src/core/base/BaseRenderer.ts
index e65a077..1455622 100644
--- a/src/core/base/BaseRenderer.ts
+++ b/src/core/base/BaseRenderer.ts
@@ -79,7 +79,7 @@ export default abstract class BaseRenderer {
   }
 
   fillObjectUserDataFromItem(item: ItemJson, ...objects: THREE.Object3D[]) {
-    _.forEach(objects, (object) => {
+    for (const object of objects) {
       if (!object.name && item.name) {
         object.name = item.name
       }
@@ -90,12 +90,12 @@ export default abstract class BaseRenderer {
         draggable: item.dt.protected !== true,
         t: item.t
       }
-    })
+    }
   }
 
   fillObjectUserDataFromLine(start: ItemJson, end: ItemJson, type: LinkType, ...objects: THREE.Object3D[]) {
     const id = getLineId(start.id, end.id, type)
-    _.forEach(objects, (object) => {
+    for (const object of objects) {
       if (!object.name) {
         object.name = id
       }
@@ -105,7 +105,7 @@ export default abstract class BaseRenderer {
         entityId: getLineId(start.id, end.id, type),
         t: start.t
       }
-    })
+    }
   }
 
   /**
@@ -116,9 +116,10 @@ export default abstract class BaseRenderer {
       console.warn('No active viewport to append objects to.')
       return
     }
-    // const dragObjects = objects.filter(obj => !!obj.userData.draggable)
-    // this.tempViewport.dragControl.setDragObjects(dragObjects, 'push')
+
     this.tempViewport.scene.add(...objects)
+    const dragObjects = objects.filter(obj => !!obj.userData.draggable)
+    this.tempViewport.dragControl.setDragObjects(dragObjects, 'push')
   }
 
   removeFromScene(...objects: THREE.Object3D[]) {
diff --git a/src/core/controls/DragControls.js b/src/core/controls/DragControls.js
index a4a7c74..7e777df 100644
--- a/src/core/controls/DragControls.js
+++ b/src/core/controls/DragControls.js
@@ -1,38 +1,45 @@
-import {
-  EventDispatcher,
-  Matrix4,
-  Plane,
-  Raycaster,
-  Vector2,
-  Vector3
-} from 'three'
-import { calcPositionUseSnap } from '@/core/ModelUtils.js'
-
-const _plane = new Plane()
-const _raycaster = new Raycaster()
-
-const _pointer = new Vector2()
-const _offset = new Vector3()
-const _intersection = new Vector3()
-const _worldPosition = new Vector3()
-const _inverseMatrix = new Matrix4()
+import { EventDispatcher, Matrix4, Plane, Raycaster, Vector2, Vector3 } from 'three'
 
+import { calcPositionUseSnap, getClosestObject } from '@/core/ModelUtils.js'
+
+const _plane = new Plane() // 用于拖拽操作的平面
+const _raycaster = new Raycaster() // 射线检测器，用于拾取物体
+
+const _pointer = new Vector2() // 屏幕坐标指针位置 (归一化设备坐标)
+const _offset = new Vector3() // 拖动时相对于点击点的偏移量
+const _intersection = new Vector3() // 与平面相交的点
+const _worldPosition = new Vector3() // 世界坐标位置
+const _inverseMatrix = new Matrix4() // 用于将位置转换到局部空间
+
+/**
+ * DragControls 控制器类
+ * 提供基于鼠标或触摸的拖拽交互功能，并支持 hover 和 clickblank 等事件
+ */
 class DragControls extends EventDispatcher {
+  /**
+   * 构造函数
+   * @param _objects 可拖拽的对象数组
+   * @param _camera 当前使用的相机
+   * @param _domElement 绑定事件的目标 DOM 元素（通常是 canvas）
+   */
   constructor(_objects, _camera, _domElement) {
     super()
 
-    _domElement.style.touchAction = 'none' // disable touch scroll
-
-    let _selected = null, _hovered = null
+    // 禁止触摸滚动行为
+    _domElement.style.touchAction = 'none'
 
-    const _intersections = []
+    let _selected = null // 当前选中（正在拖动）的对象
+    let _hovered = null // 当前悬停的对象
 
-    //
+    const _intersections = [] // 存储射线检测结果的数组
 
-    let isMove = false
-    let isMouseDownClicked = false
-    const scope = this
+    let isMove = false // 标记是否发生了移动
+    let isMouseDownClicked = false // 标记是否按下了鼠标
+    const scope = this // 保存当前上下文
 
+    /**
+     * 激活事件监听器
+     */
     function activate() {
       _domElement.addEventListener('pointermove', onPointerMove)
       _domElement.addEventListener('pointerdown', onPointerDown)
@@ -40,6 +47,9 @@ class DragControls extends EventDispatcher {
       _domElement.addEventListener('pointerleave', onPointerCancel)
     }
 
+    /**
+     * 去激活事件监听器
+     */
     function deactivate() {
       _domElement.removeEventListener('pointermove', onPointerMove)
       _domElement.removeEventListener('pointerdown', onPointerDown)
@@ -49,22 +59,41 @@ class DragControls extends EventDispatcher {
       _domElement.style.cursor = ''
     }
 
+    /**
+     * 销毁控制器并释放资源
+     */
     function dispose() {
       deactivate()
     }
 
+    /**
+     * 设置可拖拽的对象列表
+     * @param {Array} objects - 新的对象数组
+     */
     function setObjects(objects) {
       _objects = objects
     }
 
+    /**
+     * 获取当前可拖拽的对象列表
+     * @returns {Array}
+     */
     function getObjects() {
       return _objects
     }
 
+    /**
+     * 获取内部的 Raycaster 实例
+     * @returns {Raycaster}
+     */
     function getRaycaster() {
       return _raycaster
     }
 
+    /**
+     * 鼠标/指针移动事件处理函数
+     * 处理悬停、拖拽等交互逻辑
+     */
     function onPointerMove(event) {
       if (!scope.enabled || !scope.enabledMove) return
 
@@ -76,6 +105,7 @@ class DragControls extends EventDispatcher {
       updatePointer(event)
       _raycaster.setFromCamera(_pointer, _camera)
 
+      // 如果有选中的对象，则更新其位置
       if (_selected) {
         if (_raycaster.ray.intersectPlane(_plane, _intersection)) {
           const pos = _intersection.sub(_offset).applyMatrix4(_inverseMatrix)
@@ -86,7 +116,7 @@ class DragControls extends EventDispatcher {
         return
       }
 
-      // hover support
+      // 鼠标/笔悬停检测
       if (event.pointerType === 'mouse' || event.pointerType === 'pen') {
 
         _intersections.length = 0
@@ -98,24 +128,21 @@ class DragControls extends EventDispatcher {
 
           const object = _intersections[0].object
 
-          _plane.setFromNormalAndCoplanarPoint(_camera.getWorldDirection(_plane.normal), _worldPosition.setFromMatrixPosition(object.matrixWorld))
+          _plane.setFromNormalAndCoplanarPoint(
+            _camera.getWorldDirection(_plane.normal),
+            _worldPosition.setFromMatrixPosition(object.matrixWorld)
+          )
 
           if (_hovered !== object && _hovered !== null) {
-
             scope.dispatchEvent({ type: 'hoveroff', object: _hovered })
-
             _domElement.style.cursor = 'auto'
             _hovered = null
-
           }
 
           if (_hovered !== object) {
-
             scope.dispatchEvent({ type: 'hoveron', object: object })
-
             _domElement.style.cursor = 'pointer'
             _hovered = object
-
           }
 
         } else {
@@ -132,6 +159,10 @@ class DragControls extends EventDispatcher {
 
     }
 
+    /**
+     * 鼠标按下事件处理函数
+     * 检测是否点击了可拖拽对象，并准备开始拖拽
+     */
     function onPointerDown(event) {
       if (scope.enabled === false) return
 
@@ -145,41 +176,58 @@ class DragControls extends EventDispatcher {
       _raycaster.intersectObjects(objects, true, _intersections)
 
       if (_intersections.length > 0) {
+        // 判断是否启用组拖动模式
         _selected = (scope.transformGroup === true) ? _objects[0] : _intersections[0].object
 
         if (scope.enabledMove) {
-          _plane.setFromNormalAndCoplanarPoint(_camera.getWorldDirection(_plane.normal), _worldPosition.setFromMatrixPosition(_selected.matrixWorld))
+          // 设置拖拽平面
+          _plane.setFromNormalAndCoplanarPoint(
+            _camera.getWorldDirection(_plane.normal),
+            _worldPosition.setFromMatrixPosition(_selected.matrixWorld)
+          )
           if (_raycaster.ray.intersectPlane(_plane, _intersection)) {
+            // 计算偏移量
             _inverseMatrix.copy(_selected.parent.matrixWorld).invert()
-            _offset.copy(_intersection).sub(_worldPosition.setFromMatrixPosition(_selected.matrixWorld))
+            _offset.copy(_intersection).sub(
+              _worldPosition.setFromMatrixPosition(_selected.matrixWorld)
+            )
           }
 
-          // setTimeout(() => {
-          //   _domElement.style.cursor = 'move'
-          // }, 20)
           isMouseDownClicked = true
         }
+
+        // 触发 dragstart 事件
         scope.dispatchEvent({ type: 'dragstart', object: _selected, e: event })
       }
 
       isMove = false
     }
 
+    /**
+     * 鼠标释放或离开事件处理函数
+     * 结束拖拽操作或触发点击空白区域事件
+     */
     function onPointerCancel(event) {
       if (scope.enabled === false) return
 
       if (_selected) {
+        // 结束拖拽
         scope.dispatchEvent({ type: 'dragend', object: _selected, e: event })
         _selected = null
       } else if (!isMove) {
-        // 添加点击空白处的事件
+        // 如果没有发生移动，则认为是点击空白处
         scope.dispatchEvent({ type: 'clickblank', e: event })
       }
 
+      // 恢复光标状态
       _domElement.style.cursor = _hovered ? 'pointer' : 'auto'
       isMouseDownClicked = false
     }
 
+    /**
+     * 更新指针位置
+     * 将屏幕坐标转换为 NDC 设备坐标 (-1 ~ 1)
+     */
     function updatePointer(event) {
       const rect = _domElement.getBoundingClientRect()
 
@@ -187,13 +235,13 @@ class DragControls extends EventDispatcher {
       _pointer.y = -(event.clientY - rect.top) / rect.height * 2 + 1
     }
 
+    // 初始化：激活事件监听器
     activate()
 
-    // API
-
-    this.enabled = true
-    this.enabledMove = true
-    this.transformGroup = false
+    // 暴露 API 方法和属性
+    this.enabled = true // 是否启用控制器
+    this.enabledMove = true // 是否允许移动操作
+    this.transformGroup = false // 是否以组形式变换多个对象
 
     this.activate = activate
     this.deactivate = deactivate
@@ -201,9 +249,7 @@ class DragControls extends EventDispatcher {
     this.setObjects = setObjects
     this.getObjects = getObjects
     this.getRaycaster = getRaycaster
-
   }
-
 }
 
 export { DragControls }
diff --git a/src/core/controls/EsDragControls.ts b/src/core/controls/EsDragControls.ts
index 6a0b66e..83f4935 100644
--- a/src/core/controls/EsDragControls.ts
+++ b/src/core/controls/EsDragControls.ts
@@ -71,7 +71,7 @@ export default class EsDragControls {
   // 拖拽开始
   dragControlsStart(e) {
     // 右键拖拽不响应
-    if (e.e.button === 2 || !e.object.visible) return
+    if (e.e.button === 2 || !e.object?.visible) return
 
     const type = e.object.userData?.t
     const entityId = e.object.userData?.entityId
@@ -127,25 +127,6 @@ export default class EsDragControls {
       if (e.object.userData.onClick) {
         e.object.userData.onClick(e)
       }
-      if (e.object.userData?.entityId) {
-        const entityId = e.object.userData.entityId
-        const item = this.viewport.entityManager.findItemById(entityId)
-        const itemTypeName = e.object.userData.t
-        if (item.dt.protected !== true) {
-          this.viewport.state.selectedObject = markRaw(e.object)
-          this.viewport.state.selectedItem = markRaw(item)
-          this.viewport.state.selectedEntityId = entityId
-          this.viewport.state.selectedObjectMeta = getMeta(itemTypeName)
-
-          EventBus.dispatch('selectedObjectChanged', {
-            viewport: this,
-            selectedObject: this.viewport.state.selectedObject,
-            selectedItem: this.viewport.state.selectedItem,
-            selectedEntityId: this.viewport.state.selectedEntityId,
-            selectedObjectMeta: this.viewport.state.selectedObjectMeta
-          })
-        }
-      }
     }
 
     const ret = this.currentInteraction?.dragPointComplete(this.viewport, e)
@@ -182,4 +163,4 @@ export default class EsDragControls {
     this.dragControls.removeEventListener('dragend', dragEndFn)
     this.dragControls.dispose()
   }
-}
\ No newline at end of file
+}
diff --git a/src/core/controls/SelectInspect.ts b/src/core/controls/SelectInspect.ts
index f2def9f..62c3eff 100644
--- a/src/core/controls/SelectInspect.ts
+++ b/src/core/controls/SelectInspect.ts
@@ -19,7 +19,12 @@ export default class SelectInspect implements IControls {
   /**
    * 线框材质，用于显示选中对象的包围盒
    */
-  material: LineMaterial = new LineMaterial({ color: 0xffff00, linewidth: 2 })
+  yellowMaterial: LineMaterial = new LineMaterial({ color: 0xffff00, linewidth: 2 })
+
+  /**
+   * 线框材质，用于显示选中对象的包围盒
+   */
+  redMaterial: LineMaterial = new LineMaterial({ color: 0xff0000, linewidth: 2 })
 
   /**
    * 矩形材质，用于显示鼠标拖拽选择的矩形区域
@@ -76,6 +81,11 @@ export default class SelectInspect implements IControls {
       this.updateSelectionBox(this.viewport.state.selectedObject)
     })
 
+    EventBus.on('multiSelectedObjectsChanged', (data) => {
+      // 如果多选对象发生变化，清除当前选中对象的包围盒线框
+      this.updateMultiSelectionBoxes(data.multiSelectedObjects)
+    })
+
     EventBus.on('selectedObjectPropertyChanged', (data) => {
       this.updateSelectionBox(this.viewport.state.selectedObject)
     })
@@ -90,6 +100,69 @@ export default class SelectInspect implements IControls {
     })
   }
 
+  redSelectionGroup = new THREE.Group()
+
+  private updateMultiSelectionBoxes(multiSelectedObjects: THREE.Object3D[]) {
+    // 为所有多选对象创建包围盒线框
+    this.clearRedSelectionBoxes()
+
+    if (!multiSelectedObjects || multiSelectedObjects.length === 0) {
+      return
+    }
+
+    for (const object of multiSelectedObjects) {
+      if (object.userData.entityId) {
+        this.createRedSelectionBox(object)
+      }
+    }
+  }
+
+  clearRedSelectionBoxes() {
+    // 清除之前的红色包围盒线框
+    if (this.redSelectionGroup.children.length > 0) {
+      for (const child of this.redSelectionGroup.children) {
+        this.redSelectionGroup.remove(child)
+      }
+    }
+    this.viewport.scene.remove(this.redSelectionGroup)
+    this.redSelectionGroup = new THREE.Group()
+    this.viewport.scene.add(this.redSelectionGroup)
+  }
+
+  createRedSelectionBox(object: THREE.Object3D) {
+    // 如果对象没有 entityId，则不创建包围盒线框
+    if (!object.userData.entityId) {
+      return
+    }
+
+    // 如果选中的对象小于 0.5，要扩展包围盒
+    const RED_EXPAND_AMOUNT = 0.01 // 扩展包围盒的大小
+    // 避免某些蒙皮网格的帧延迟效应(e.g. Michelle.glb)
+    object.updateWorldMatrix(false, true)
+
+    const box = new THREE.Box3().setFromObject(object)
+    box.expandByScalar(RED_EXPAND_AMOUNT)
+
+    const size = new THREE.Vector3()
+    box.getSize(size)
+
+    const center = new THREE.Vector3()
+    box.getCenter(center)
+
+    // 创建包围盒几何体
+    const helperGeometry = new THREE.BoxGeometry(size.x, size.y, size.z)
+    const edgesGeometry = new THREE.EdgesGeometry(helperGeometry)
+    const lineGeom = new LineGeometry()
+    // @ts-ignore
+    lineGeom.setPositions(edgesGeometry.attributes.position.array)
+
+    const selectionBox = new Line2(lineGeom, this.redMaterial)
+    selectionBox.computeLineDistances()
+    selectionBox.position.copy(center)
+
+    this.redSelectionGroup.add(selectionBox)
+  }
+
   /**
    * 更新选中对象的包围盒线框
    */
@@ -101,12 +174,13 @@ export default class SelectInspect implements IControls {
     }
     this.selectionId = selectedObject.userData?.entityId
 
-    const expandAmount = 0.2 // 扩展包围盒的大小
+    // 如果选中的对象小于 0.5，要扩展包围盒
+    const YELLOW_EXPAND_AMOUNT = 0.03 // 扩展包围盒的大小
     // 避免某些蒙皮网格的帧延迟效应(e.g. Michelle.glb)
     selectedObject.updateWorldMatrix(false, true)
 
     const box = new THREE.Box3().setFromObject(selectedObject)
-    box.expandByScalar(expandAmount)
+    box.expandByScalar(YELLOW_EXPAND_AMOUNT)
 
     const size = new THREE.Vector3()
     box.getSize(size)
@@ -117,16 +191,13 @@ export default class SelectInspect implements IControls {
     // 创建包围盒几何体
     const helperGeometry = new THREE.BoxGeometry(size.x, size.y, size.z)
     const edgesGeometry = new THREE.EdgesGeometry(helperGeometry)
-
-    // 使用 LineGeometry 包装 edgesGeometry
     const lineGeom = new LineGeometry()
-    //@ts-ignore
+    // @ts-ignore
     lineGeom.setPositions(edgesGeometry.attributes.position.array)
 
-    const selectionBox = new Line2(lineGeom, this.material)
+    const selectionBox = new Line2(lineGeom, this.yellowMaterial)
     selectionBox.computeLineDistances()
     selectionBox.position.copy(center)
-    selectionBox.name = 'selectionBox'
     this.selectionBox = selectionBox
 
     console.log('selectedItem', this.viewport.state.selectedItem)
@@ -162,7 +233,7 @@ export default class SelectInspect implements IControls {
     if (this.recStartPos) {
       // 创建矩形
       this.rectangle = new THREE.Mesh(
-        new THREE.PlaneGeometry(1, 1),
+        new THREE.PlaneGeometry(0.001, 0.001),
         this.rectMaterial
       )
       this.rectangle.name = 'selectRectangle'
@@ -176,6 +247,7 @@ export default class SelectInspect implements IControls {
     }
   }
 
+
   updateRectangle(position: THREE.Vector3) {
     if (!this.rectangle || !this.recStartPos) return
     // console.log('updateRectangle', this.recStartPos, position)
@@ -201,6 +273,8 @@ export default class SelectInspect implements IControls {
       // 记录鼠标按下位置
       this.recStartPos = this.viewport.getClosestIntersection(event)
       this.createRectangle()
+      this.viewport.controls.enabled = false // 禁用控制器
+
     } else {
       // 为 click 事件添加处理逻辑
       this.clickTime = Date.now()
@@ -220,11 +294,14 @@ export default class SelectInspect implements IControls {
 
   disposeRect() {
     if (this.rectangle !== null) {
+      // 查找在这个矩形内的所有有效业务对象，并将他们添加进 viewport.state.multiSelectedObjects
+      this.multipleSelectedObjects()
       this.viewport.scene.remove(this.rectangle)
       this.rectangle.geometry.dispose()
       this.rectangle = null
     }
     this.recStartPos = null
+    this.viewport.controls.enabled = true // 启用控制器
   }
 
   onMouseUp(event: MouseEvent) {
@@ -235,6 +312,7 @@ export default class SelectInspect implements IControls {
       // 如果是点击事件，触发选中逻辑
       const objects: THREE.Object3D[] = this.viewport.entityManager.getObjectByCanvasMouse(event)
       if (objects.length > 0) {
+        console.log('mouseClick', objects)
         const object = objects[0]
         const entityId = object.userData.entityId
         const item = this.viewport.entityManager.findItemById(entityId)
@@ -244,7 +322,6 @@ export default class SelectInspect implements IControls {
           this.viewport.state.selectedItem = markRaw(item)
           this.viewport.state.selectedEntityId = entityId
           this.viewport.state.selectedObjectMeta = getMeta(itemTypeName)
-
           EventBus.dispatch('selectedObjectChanged', {
             viewport: markRaw(this.viewport),
             selectedObject: this.viewport.state.selectedObject,
@@ -253,7 +330,71 @@ export default class SelectInspect implements IControls {
             selectedObjectMeta: this.viewport.state.selectedObjectMeta
           })
         }
+      } else {
+        // 如果没有选中任何对象，清除选中状态
+        this.viewport.state.selectedObject = null
+        this.viewport.state.selectedItem = null
+        this.viewport.state.selectedEntityId = null
+        this.viewport.state.selectedObjectMeta = null
+        EventBus.dispatch('selectedObjectChanged', {
+          viewport: markRaw(this.viewport),
+          selectedObject: null,
+          selectedItem: null,
+          selectedEntityId: null,
+          selectedObjectMeta: null
+        })
+      }
+    }
+  }
+
+  private multipleSelectedObjects() {
+    if (!this.rectangle || !this.recStartPos) return
+
+    // 获取矩形的包围盒
+    const box = new THREE.Box3().setFromObject(this.rectangle)
+
+    // 获取盒子的 startX, startZ, endX, endZ
+    const startX = box.min.x
+    const startZ = box.min.z
+    const endX = box.max.x
+    const endZ = box.max.z
+
+    // 查找所有在矩形内的对象
+    const objects = this.viewport.entityManager.getObjectsInBox(startX, startZ, endX, endZ)
+
+    // 清空之前的多选对象
+    this.viewport.state.multiSelectedObjects = []
+
+    // 遍历找到的对象，添加到多选对象中
+    const multiSelectedObjects = []
+    const multiSelectedItems = []
+    const multiSelectedEntityIds = []
+    const multiSelectedObjectMetas = []
+    for (const object of objects) {
+      if (object.userData.entityId && object.userData.t) {
+        const item = this.viewport.entityManager.findItemById(object.userData.entityId)
+        if (item && item.dt.protected !== true) {
+          multiSelectedObjects.push(object)
+          multiSelectedItems.push(item)
+          multiSelectedEntityIds.push(object.userData.entityId)
+          multiSelectedObjectMetas.push(getMeta(object.userData.t))
+        }
       }
     }
+
+    // 触发多选对象更新事件
+    this.viewport.state.multiSelectedObjects = markRaw(objects)
+    this.viewport.state.multiSelectedItems = markRaw(multiSelectedItems)
+    this.viewport.state.multiSelectedEntityIds = multiSelectedEntityIds
+    this.viewport.state.multiSelectedObjectMetas = multiSelectedObjectMetas
+    EventBus.dispatch('multiSelectedObjectsChanged', {
+      viewport: markRaw(this.viewport),
+      multiSelectedObjects: this.viewport.state.multiSelectedObjects,
+      multiSelectedItems: this.viewport.state.multiSelectedItems,
+      multiSelectedEntityIds: this.viewport.state.multiSelectedEntityIds,
+      multiSelectedObjectMetas: this.viewport.state.multiSelectedObjectMetas
+    })
   }
+
+
 }
diff --git a/src/core/engine/Viewport.ts b/src/core/engine/Viewport.ts
index f1f41b2..c87036f 100644
--- a/src/core/engine/Viewport.ts
+++ b/src/core/engine/Viewport.ts
@@ -20,6 +20,7 @@ import InteractionManager from '@/core/manager/InteractionManager'
 import { calcPositionUseSnap } from '@/core/ModelUtils'
 import StateManager from '@/core/manager/StateManager.ts'
 import EventBus from '@/runtime/EventBus.ts'
+import Constract from '@/core/Constract.ts'
 import type { IMeta } from '@/core/base/IMeta.ts'
 
 /**
@@ -28,7 +29,7 @@ import type { IMeta } from '@/core/base/IMeta.ts'
  */
 export default class Viewport {
   viewerDom: HTMLElement
-  camera: THREE.OrthographicCamera
+  camera: THREE.Camera // THREE.OrthographicCamera
   renderer: THREE.WebGLRenderer
   statsControls: Stats
   controls: OrbitControls
@@ -65,7 +66,18 @@ export default class Viewport {
     isReady: false,
     isUpdating: false,
     cursorMode: 'normal',
-    selectedObject: null,
+
+    selectedObject: undefined,
+    selectedItem: undefined,
+    selectedEntityId: undefined,
+    selectedObjectMeta: undefined,
+
+    multiSelectedObjects: [],
+    multiSelectedItems: [],
+    multiSelectedEntityIds: [],
+    multiSelectedObjectMetas: [],
+
+    view3DMode: Constract.Mode2D,
     camera: {
       position: { x: 0, y: 0, z: 0 },
       rotation: { x: 0, y: 0, z: 0 }
@@ -142,7 +154,14 @@ export default class Viewport {
     this.renderer = renderer
 
     // 创建正交摄像机
-    this.initMode2DCamera()
+    // this.initMode2DCamera()
+    this.watchList.push(watch(() => this.state.view3DMode, (newVal) => {
+      if (newVal === Constract.Mode3D) {
+        this.initMode3DCamera()
+      } else {
+        this.initMode2DCamera()
+      }
+    }, { immediate: true }))
 
     // 注册拖拽组件
     this.dragControl = new EsDragControls(this)
@@ -165,6 +184,7 @@ export default class Viewport {
       this.updateGridVisibility()
     }))
 
+
     // 监听窗口大小变化
     if (this.resizeObserver) {
       this.resizeObserver.unobserve(this.viewerDom)
@@ -211,6 +231,44 @@ export default class Viewport {
   }
 
   /**
+   * 初始化3D相机
+   */
+  initMode3DCamera() {
+    if (this.camera) {
+      this.scene.remove(this.camera)
+    }
+
+    // ============================ 创建透视相机
+    const viewerDom = this.viewerDom
+    const cameraNew = new THREE.PerspectiveCamera(
+      25,
+      viewerDom.clientWidth / viewerDom.clientHeight,
+      1,
+      2000
+    )
+    cameraNew.position.set(4, 2, -3)
+    cameraNew.lookAt(0, 0, 0)
+    this.camera = cameraNew
+    this.scene.add(this.camera)
+
+    // ============================ 创建控制器
+    const controls = new OrbitControls(
+      this.camera,
+      this.renderer?.domElement
+    )
+    controls.enableDamping = false
+    controls.screenSpacePanning = false // 定义平移时如何平移相机的位置 控制不上下移动
+    controls.minDistance = 2
+    controls.maxDistance = 1000
+    controls.mouseButtons = { LEFT: THREE.MOUSE.PAN, RIGHT: THREE.MOUSE.ROTATE }
+    // 下面这句话非常影响性能
+    // this.controls.addEventListener('change', ()=>{
+    //     this.renderer.render(this.scene, this.camera);
+    // });
+    this.controls = controls
+  }
+
+  /**
    * 初始化2D相机
    */
   initMode2DCamera() {
@@ -253,7 +311,7 @@ export default class Viewport {
     controlsNew.maxDistance = 1000
     this.controls = controlsNew
 
-    this.camera.updateProjectionMatrix()
+    cameraNew.updateProjectionMatrix()
 
     this.syncCameraState()
   }
@@ -290,26 +348,32 @@ export default class Viewport {
   syncCameraState() {
     if (this.camera) {
       const camera = this.camera
+      if (this.camera instanceof THREE.PerspectiveCamera) {
+        this.state.camera.position.x = camera.position.x
+        this.state.camera.position.y = (camera as THREE.PerspectiveCamera).zoom // this.getEffectiveViewDistance()
+        this.state.camera.position.z = camera.position.z
 
-      this.state.camera.position.x = camera.position.x
-      this.state.camera.position.y = camera.zoom // this.getEffectiveViewDistance()
-      this.state.camera.position.z = camera.position.z
+      } else {
+        this.state.camera.position.x = camera.position.x
+        this.state.camera.position.y = 5
+        this.state.camera.position.z = camera.position.z
+      }
     }
   }
 
-  /**
-   * 计算相机到目标的有效视距
-   */
-  getEffectiveViewDistance() {
-    if (!this.camera) {
-      return 10
-    }
-    const camera = this.camera
-    const viewHeight = (camera.top - camera.bottom) / camera.zoom
-    // 假设我们希望匹配一个虚拟的透视相机（通常使用45度fov作为参考）
-    const referenceFOV = 45 // 参考视场角
-    return viewHeight / (2 * Math.tan(THREE.MathUtils.degToRad(referenceFOV) / 2))
-  }
+  // /**
+  //  * 计算相机到目标的有效视距
+  //  */
+  // getEffectiveViewDistance() {
+  //   if (!this.camera || !(this.camera instanceof THREE.PerspectiveCamera)) {
+  //     return 5
+  //   }
+  //   const camera = this.camera as THREE.PerspectiveCamera
+  //   const viewHeight = (camera.top - camera.bottom) / camera.zoom
+  //   // 假设我们希望匹配一个虚拟的透视相机（通常使用45度fov作为参考）
+  //   const referenceFOV = 45 // 参考视场角
+  //   return viewHeight / (2 * Math.tan(THREE.MathUtils.degToRad(referenceFOV) / 2))
+  // }
 
   handleResize(entries: any) {
     for (let entry of entries) {
@@ -358,6 +422,12 @@ export default class Viewport {
    * 根据可视化范围更新网格的透明度
    */
   updateGridVisibility() {
+    if (this.camera === undefined || !(this.camera instanceof THREE.PerspectiveCamera)) {
+      // 如果没有相机或相机不是透视相机，则不更新网格可见性
+      this.gridHelper.visible = true
+      this.gridHelper.material.opacity = 1
+      return
+    }
     const cameraDistance = this.state.camera.position.y
     const maxVisibleDistance = 4 // 网格完全不可见的最小距离
     const fadeStartDistance = 9 // 开始淡出的最大距离
@@ -490,18 +560,22 @@ export interface ViewportState {
   cursorMode: string // CursorMode,
 
   /**
-   * 选中的对象
+   * 黄选的对象
    */
   selectedObject: THREE.Object3D | undefined
-
   selectedItem: ItemJson | undefined
-
   selectedEntityId: string | undefined
+  selectedObjectMeta: IMeta | undefined
 
   /**
-   * 选中的对象的元数据
+   * 红选的对象集
    */
-  selectedObjectMeta: IMeta | undefined
+  multiSelectedObjects: THREE.Object3D[]
+  multiSelectedItems: ItemJson[]
+  multiSelectedEntityIds: string[]
+  multiSelectedObjectMetas: IMeta[]
+
+  view3DMode: string // Constract.Mode2D | Constract.Mode3D
 
   /**
    * 是否正在更新中
diff --git a/src/core/manager/EntityManager.ts b/src/core/manager/EntityManager.ts
index a09fc19..2fa5744 100644
--- a/src/core/manager/EntityManager.ts
+++ b/src/core/manager/EntityManager.ts
@@ -2,7 +2,7 @@ import * as THREE from 'three'
 import type Viewport from '@/core/engine/Viewport'
 import type BaseRenderer from '@/core/base/BaseRenderer'
 import { getRenderer } from './ModuleManager'
-import { getLineId, parseLineId } from '@/core/ModelUtils'
+import { getClosestObject, getLineId, parseLineId } from '@/core/ModelUtils'
 import { Vector2 } from 'three'
 
 /**
@@ -541,11 +541,33 @@ export default class EntityManager {
     if (!_intersections || _intersections.length === 0) {
       return []
     }
+
     // 根据距离排序射线命中的对象集
     return _.map(
       _intersections.sort((a, b) => a.distance - b.distance),
-      r => r.object
+      r => getClosestObject(r.object)
+    ).filter(obj => obj?.userData && obj.userData.selectable !== false)
+  }
+
+  /**
+   * 获取指定范围内的所有对象
+   */
+  getObjectsInBox(startX: number, startZ: number, endX: number, endZ: number) {
+    const box = new THREE.Box2(
+      new THREE.Vector2(startX, startZ),
+      new THREE.Vector2(endX, endZ)
     )
+    const objectsInBox: THREE.Object3D[] = []
+
+    for (const [id, objects] of this.objects.entries()) {
+      for (const obj of objects) {
+        if (box.containsPoint(new Vector2(obj.position.x, obj.position.z))) {
+          objectsInBox.push(obj)
+        }
+      }
+    }
+
+    return objectsInBox
   }
 }
 
@@ -585,4 +607,4 @@ export class Relation {
     else
       throw new Error(`Unknown link type: ${type}`)
   }
-}
\ No newline at end of file
+}
diff --git a/src/editor/Model2DEditor.vue b/src/editor/Model2DEditor.vue
index 364a4fd..136f18f 100644
--- a/src/editor/Model2DEditor.vue
+++ b/src/editor/Model2DEditor.vue
@@ -7,6 +7,15 @@
       <el-cascader placeholder="选择楼层" size="small" v-model="currentLevel"
                    :options="calcCatalog" filterable :show-all-levels="false" clearable
                    :props="{emitPath:false}" />
+      <span class="section-toolbar-line"></span>
+      <el-button-group>
+        <el-button :icon="renderIcon('antd CameraFilled')" link
+                   :type="state?.view3DMode===Constract.Mode2D?'primary':''"
+                   @click="state.view3DMode = Constract.Mode2D">2D</el-button>
+        <el-button :icon="renderIcon('fa CameraRetro')" link
+                   :type="state?.view3DMode===Constract.Mode3D?'primary':''"
+                   @click="state.view3DMode = Constract.Mode3D">3D</el-button>
+      </el-button-group>
     </div>
     <div class="section-content">
       <div v-if="currentStateManagerId" :key="currentStateManagerId || getRandom()"
@@ -250,4 +259,4 @@ export default defineComponent({
     }
   }
 })
-</script>
\ No newline at end of file
+</script>
diff --git a/src/editor/widgets/property/PropertyView.vue b/src/editor/widgets/property/PropertyView.vue
index 4ea9053..67acf02 100644
--- a/src/editor/widgets/property/PropertyView.vue
+++ b/src/editor/widgets/property/PropertyView.vue
@@ -93,12 +93,14 @@ export default {
     selectedObjectChanged(state) {
       const data = state.selectedItem;
       console.log("selectedObjectChanged data", data)
-      this.viewport.stateManager.beginStateUpdate()
-      const item = _.find(this.viewport.stateManager.vdata.items, item=>item.id === data.id)
-      // item.tf[0][0] = item.tf[0][0] / 2;
-      console.log("selectedObjectChanged item", item)
-      // _.extend(item, data)
-      this.viewport.stateManager.endStateUpdate()
+      if(data) {
+        this.viewport.stateManager.beginStateUpdate()
+        const item = _.find(this.viewport.stateManager.vdata.items, item => item.id === data.id)
+        // item.tf[0][0] = item.tf[0][0] / 2;
+        console.log("selectedObjectChanged item", item)
+        // _.extend(item, data)
+        this.viewport.stateManager.endStateUpdate()
+      }
     },
   },
   mounted() {
@@ -170,4 +172,4 @@ export default {
     margin: 5px 0;
   }
 }
-</style>
\ No newline at end of file
+</style>
diff --git a/src/modules/gstore/GstoreRenderer.ts b/src/modules/gstore/GstoreRenderer.ts
index 96fcc95..40c284e 100644
--- a/src/modules/gstore/GstoreRenderer.ts
+++ b/src/modules/gstore/GstoreRenderer.ts
@@ -56,7 +56,7 @@ export default class GstoreRenderer extends BaseRenderer {
     group.name = GstoreRenderer.POINT_NAME
 
     // 绘制背景矩形框
-    const planeGeometry = new THREE.PlaneGeometry(item.dt.storeWidth, item.dt.storeDepth);
+    const planeGeometry = new THREE.PlaneGeometry(item.dt.storeWidth, item.dt.storeDepth)
     planeGeometry.rotateX(-Math.PI / 2)
     const planeMaterial = new THREE.MeshBasicMaterial({
       color: 'white',
@@ -64,8 +64,8 @@ export default class GstoreRenderer extends BaseRenderer {
       opacity: 0.2,       // 50%透明度
       depthWrite: false,   // 防止深度冲突
       side: THREE.DoubleSide  // 双面渲染:ml-citation{ref="5,8" data="citationList"}
-    });
-    const planeMesh = new THREE.Mesh(planeGeometry, planeMaterial);
+    })
+    const planeMesh = new THREE.Mesh(planeGeometry, planeMaterial)
     group.add(planeMesh)
 
     if (!item.dt.storeWidth || !item.dt.storeDepth) {
@@ -77,12 +77,12 @@ export default class GstoreRenderer extends BaseRenderer {
     const lineYLen = item.dt.storeDepth - this.defaultLineWidth
 
     const lineGeometry = new LineGeometry().setPositions([
-      -(lineXLen/2),-(lineYLen/2),0,
-      lineXLen/2,-(lineYLen/2),0,
-      lineXLen/2,lineYLen/2,0,
-      -(lineXLen/2),lineYLen/2,0,
-      -(lineXLen/2),-(lineYLen/2),0
-    ]);
+      -(lineXLen / 2), -(lineYLen / 2), 0,
+      lineXLen / 2, -(lineYLen / 2), 0,
+      lineXLen / 2, lineYLen / 2, 0,
+      -(lineXLen / 2), lineYLen / 2, 0,
+      -(lineXLen / 2), -(lineYLen / 2), 0
+    ])
     lineGeometry.rotateX(-Math.PI / 2)
     const lineMaterial = new LineMaterial({
       color: 0x00ff00,
@@ -90,9 +90,9 @@ export default class GstoreRenderer extends BaseRenderer {
       worldUnits: true,
       resolution: new THREE.Vector2(window.innerWidth, window.innerHeight),
       side: THREE.DoubleSide
-    });
+    })
     //
-    const line = new Line2(lineGeometry, lineMaterial);
+    const line = new Line2(lineGeometry, lineMaterial)
     group.add(line as THREE.Object3D)
 
     return [group]
@@ -100,6 +100,6 @@ export default class GstoreRenderer extends BaseRenderer {
 
   dispose() {
     super.dispose()
-    this.pointMaterial.dispose()
+    this.pointMaterial?.dispose()
   }
 }
diff --git a/src/modules/rack/RackMeta.ts b/src/modules/rack/RackMeta.ts
index 2273048..77b81e9 100644
--- a/src/modules/rack/RackMeta.ts
+++ b/src/modules/rack/RackMeta.ts
@@ -7,8 +7,49 @@ export default [
   { editor: 'TransformEditor', category: 'basic' },
   { field: 'dt.color', editor: 'Color', label: '颜色', category: 'basic' },
   { editor: '-', category: 'basic' },
+
+
+  { field: 'dt.rackDepth', editor: 'NumberInput', label: '货架深度', category: 'basic' },
+  { field: 'dt.levelCount', editor: 'NumberInput', label: '总层数', category: 'basic' },
+  { field: 'dt.bayCount', editor: 'NumberInput', label: '总列数', category: 'basic' },
+  { field: 'dt.hideFloor', editor: 'NumberInput', label: '隐藏底板', category: 'basic' },
+  { field: 'dt.extendColumns', editor: 'NumberInput', label: '扩展挡板', category: 'basic' },
+  { field: 'dt.columnSpacing', editor: 'NumberInput', label: '支脚跨越', category: 'basic' },
+  { field: 'dt.bays', editor: 'BayEditor', category: 'basic' },
+  /**
+   * dt.bays 5列3层货架示例
+   * {
+   *   dt: {
+   *     rackDepth: 1.1, // 货架深度
+   *     levelCount: 3,  // 总层数
+   *     bayCount: 5,    // 总列数
+   *     hideFloor: false,  // 隐藏底板
+   *     extendColumns: true, // 扩展挡板
+   *     columnSpacing: 1, // 支脚跨越
+   *     bays: [  // 每列的配置
+   *       {
+   *         bayWidth: 1.6,  // 列的宽度
+   *         levelHeight: [ 1.4, 1.4, 1.4 ] // 每层的高度
+   *       },
+   *       {bayWidth: 1.6, levelHeight: [ 1.4, 1.4, 1.4 ]},
+   *       {bayWidth: 1.6, levelHeight: [ 1.4, 1.4, 1.4 ]},
+   *       {bayWidth: 1.6, levelHeight: [ 1.4, 1.4, 1.4 ]},
+   *       {bayWidth: 1.6, levelHeight: [ 1.4, 1.4, 1.4 ]},
+   *     ]
+   *   }
+   * }
+   *
+   *
+   *
+   *
+   *
+   *
+   *
+   */
+
+
   { field: 'tf', editor: 'InOutCenterEditor', category: 'basic' },
   { field: 'dt.selectable', editor: 'Switch', label: '可选中', category: 'basic' },
   { field: 'dt.protected', editor: 'Switch', label: '受保护', category: 'basic' },
   { field: 'visible', editor: 'Switch', label: '可见', category: 'basic' }
-] as IMeta
\ No newline at end of file
+] as IMeta
diff --git a/src/modules/way/WayRenderer.ts b/src/modules/way/WayRenderer.ts
index a1e3fee..ac468ab 100644
--- a/src/modules/way/WayRenderer.ts
+++ b/src/modules/way/WayRenderer.ts
@@ -87,7 +87,7 @@ export default class WayRenderer extends BaseRenderer {
     const width = 1
 
     const curve = new THREE.LineCurve3(startPosition, endPosition)
-    const tubeGeometry = new THREE.TubeGeometry(curve, 1, width / 2, 8, false)
+    const tubeGeometry = new THREE.TubeGeometry(curve, 1, width / 2, 2, false)
     const lineMesh = new THREE.Mesh(tubeGeometry, this.lineMaterial)
     group.add(lineMesh)
 
@@ -169,4 +169,4 @@ export default class WayRenderer extends BaseRenderer {
     this.pointMaterial.dispose()
     this.lineMaterial.dispose()
   }
-}
\ No newline at end of file
+}
diff --git a/src/runtime/EventBus.ts b/src/runtime/EventBus.ts
index 87350e4..160ce28 100644
--- a/src/runtime/EventBus.ts
+++ b/src/runtime/EventBus.ts
@@ -6,7 +6,8 @@ export type DispatchNames = 'selectedObjectChanged' |
   'catalogChanged' |
   'dataLoadComplete' |
   'entityDeleted' |
-  'selectedObjectPropertyChanged'
+  'selectedObjectPropertyChanged' |
+  'multiSelectedObjectsChanged'
 
 export default {
   dispatch(name: DispatchNames, data?: any) {
@@ -18,4 +19,4 @@ export default {
   off(name: DispatchNames, callback: (data?: any) => void) {
     instance.off(name, callback)
   }
-}
\ No newline at end of file
+}