measure createLabel

src/designer/Viewport.ts

@@ -23,6 +23,8 @@ import MeasureTool from '@/designer/model2DEditor/tools/MeasureTool.ts'
 import { CSS3DRenderer } from 'three/examples/jsm/renderers/CSS3DRenderer'
 import { CSS2DRenderer } from 'three/examples/jsm/renderers/CSS2DRenderer'
 import type { ICursorTool } from '@/designer/model2DEditor/tools/CursorTool.ts'
+import { getAllItemTypes } from '@/runtime/DefineItemType.ts'
+import type { ItemTypeDefineOption } from '@/model/itemType/ItemTypeDefine.ts'
 
 /**
  * 编辑器对象
@@ -81,7 +83,7 @@ export default class Viewport {
   }
 
   dispatchSignal(signal: string, data?: any) {
-    console.log('signal', signal, data)
+    // console.log('signal', signal, data)
   }
 
   /**
@@ -246,6 +248,10 @@ export default class Viewport {
     this.measure = new MeasureTool()
     this.measure.init(this)
 
+    _.forEach(getAllItemTypes(), (itemType: ItemTypeDefineOption) => {
+      itemType.clazz.afterAddViewport(this)
+    })
+
     this.state.isReady = true
   }
 

src/designer/model2DEditor/EsDragControls.ts

@@ -2,6 +2,8 @@ import { DragControls } from './DragControls.js'
 import * as THREE from 'three'
 import type Viewport from '@/designer/Viewport.ts'
 import Constract from '@/designer/Constract.ts'
+import { getItemTypeByName } from '@/runtime/DefineItemType.ts'
+import type { ItemTypeDefineOption } from '@/model/itemType/ItemTypeDefine.ts'
 
 // dragControls 绑定函数
 let dragStartFn, dragFn, dragEndFn, clickblankFn
@@ -77,11 +79,17 @@ export default class EsDragControls {
     // 记录拖拽按下的位置和对象
     this.onDownPosition = { x: e.e.clientX, y: e.e.clientY }
 
-    switch (e.object.userData.type) {
-      case Constract.MeasureMarker:
-        this.viewport.measure.dragPointStart(e.object)
-        break
+    if (e.object.userData?.type) {
+      const itemType: ItemTypeDefineOption = getItemTypeByName(e.object.userData.type)
+      if (itemType?.clazz) {
+        itemType.clazz.dragPointStart(this.viewport, e.object, e.e)
+      }
     }
+    // switch (e.object.userData.type) {
+    //   case Constract.MeasureMarker:
+    //     this.viewport.measure.dragPointStart(e.object)
+    //     break
+    // }
   }
 
   // 拖拽中
@@ -108,11 +116,17 @@ export default class EsDragControls {
       }
     }
 
-    switch (e.object.userData.type) {
-      case Constract.MeasureMarker:
-        this.viewport.measure.dragPointComplete()
-        break
+    if (e.object.userData?.type) {
+      const itemType: ItemTypeDefineOption = getItemTypeByName(e.object.userData.type)
+      if (itemType?.clazz) {
+        itemType.clazz.dragPointComplete(this.viewport)
+      }
     }
+    // switch (e.object.userData.type) {
+    //   case Constract.MeasureMarker:
+    //     this.viewport.measure.dragPointComplete()
+    //     break
+    // }
   }
 
   // 点击可拖拽物体之外

src/designer/model2DEditor/tools/MeasureTool.ts

@@ -4,6 +4,9 @@ import { getUnitString, numberToString } from '@/utils/webutils'
 import { CSS2DObject } from 'three/examples/jsm/renderers/CSS2DRenderer'
 import Constract from '@/designer/Constract.ts'
 import type { ICursorTool } from '@/designer/model2DEditor/tools/CursorTool.ts'
+import type Measure from '@/model/itemType/measure/Measure.ts'
+import { getItemTypeByName } from '@/runtime/DefineItemType.ts'
+import { LABEL_NAME, LINE_NAME } from '@/model/itemType/measure/Measure.ts'
 
 let pdFn, pmFn, puFn, kdFn
 
@@ -11,11 +14,6 @@ let pdFn, pmFn, puFn, kdFn
  * 用于在 threejs 中创建一系列的 object_for_measure 点，并标记他的距离
  */
 export default class MeasureTool implements ICursorTool {
-  static OBJ_NAME = 'measure_'
-  static LABEL_NAME = 'measure_label'
-  static LINE_NAME = 'measure_line'
-  static MAX_DISTANCE = 500  //当相交物体的距离太远时，忽略它
-
   /**
    * 测量工具所在的视图窗口，从这里可以取到 所有 Three.js 相关的对象.
    * 比如:
@@ -32,7 +30,8 @@ export default class MeasureTool implements ICursorTool {
   /**
    * 当前测绘内容组, 所有测量点、线、标签都在这个组中. 但不包括临时点、线
    */
-  group: THREE.Group
+  measure: Measure
+
   /**
    * 是否完成测量
    */
@@ -88,6 +87,11 @@ export default class MeasureTool implements ICursorTool {
 
   mode: CursorMode
 
+  private draggingIndex: number = -1
+  private connectedLines: THREE.Line[] = []
+  private connectedLabels: CSS2DObject[] = []
+  private originalPosition: THREE.Vector3 = new THREE.Vector3()
+
   /**
    * 测量工具初始化
    */
@@ -95,12 +99,7 @@ export default class MeasureTool implements ICursorTool {
     this.viewport = viewport
     this.canvas = this.viewport.renderer.domElement as HTMLCanvasElement
 
-    this.group = new THREE.Group()
-    this.group.name = `${MeasureTool.OBJ_NAME}_group`
-    this.group.userData = {
-      mode: Constract.CursorModeMeasure
-    }
-    this.viewport.scene.add(this.group)
+    this.measure = getItemTypeByName('measure')!.clazz
   }
 
   /**
@@ -204,12 +203,10 @@ export default class MeasureTool implements ICursorTool {
         geom.setFromPoints([lastPoint, point])
       }
 
-      if (this.mode === Constract.CursorModeMeasure) {
-        const dist = p0.distanceTo(point)
-        const label = `${numberToString(dist)} ${getUnitString(this.mode)}`
-        const position = new THREE.Vector3((point.x + p0.x) / 2, (point.y + p0.y) / 2, (point.z + p0.z) / 2)
-        this.addOrUpdateTempLabel(label, position)
-      }
+      const dist = p0.distanceTo(point)
+      const label = `${numberToString(dist)} ${getUnitString(this.mode)}`
+      const position = new THREE.Vector3((point.x + p0.x) / 2, (point.y + p0.y) / 2, (point.z + p0.z) / 2)
+      this.addOrUpdateTempLabel(label, position)
     }
 
     // this.viewport.dispatchSignal('sceneGraphChanged')
@@ -259,7 +256,7 @@ export default class MeasureTool implements ICursorTool {
     const marker = this.createPointMarker(point)
     marker.userData.point = point
     marker.userData.pointIndex = count - 1
-    this.group.add(marker)
+    this.measure.group.add(marker)
 
     // 把点加入拖拽控制器
     this.viewport.dragControl.setDragObjects([marker], 'push')
@@ -270,13 +267,13 @@ export default class MeasureTool implements ICursorTool {
 
       this.tempLabel.position.set((p0.x + point.x) / 2, (p0.y + point.y) / 2, (p0.z + point.z) / 2)
       this.tempLabel.userData.pointIndices = [count - 2, count - 1]
-      this.group.add(this.tempLabel)
+      this.measure.group.add(this.tempLabel)
       this.tempLabel = undefined
 
       // 临时线
       this.tempLine.geometry.setFromPoints([p0, point])
       this.tempLine.userData.pointIndices = [count - 2, count - 1]
-      this.group.add(this.tempLine)
+      this.measure.group.add(this.tempLine)
       this.tempLine = undefined
     }
 
@@ -327,154 +324,12 @@ export default class MeasureTool implements ICursorTool {
    */
   addOrUpdateTempLabel(label: string, position: THREE.Vector3) {
     if (!this.tempLabel) {
-      this.tempLabel = this.createLabel(label)
-      console.log('addOrUpdateTempLabel', label, position)
+      this.tempLabel = this.measure.createLabel(label)
       this.viewport.scene.add(this.tempLabel)
     }
     this.tempLabel.position.set(position.x, position.y, position.z)
     this.tempLabel.element.innerHTML = label
   }
 
-  /**
-   * 创建标签
-   */
-  createLabel(text: string): CSS2DObject {
-    const div = document.createElement('div')
-    div.className = 'css2dObjectLabel'
-    div.innerHTML = text
-    div.style.padding = '5px 8px'
-    div.style.color = '#fff'
-    div.style.fontSize = '14px'
-    div.style.position = 'absolute'
-    div.style.backgroundColor = 'rgba(25, 25, 25, 0.3)'
-    div.style.borderRadius = '12px'
-    div.style.top = '0px'
-    div.style.left = '0px'
-    // div.style.pointerEvents = 'none' //避免HTML元素影响场景的鼠标事件
-    const obj = new CSS2DObject(div)
-    obj.name = MeasureTool.LABEL_NAME
-    obj.userData = {
-      type: Constract.MeasureLabel
-    }
-    return obj
-  }
-
-  private draggingIndex: number = -1
-  private connectedLines: THREE.Line[] = []
-  private connectedLabels: CSS2DObject[] = []
-  private originalPosition: THREE.Vector3 = new THREE.Vector3()
-
-  /**
-   * 测量点被 DragControls 拖拽时触发这个方法
-   * description:
-   * 这个方法会在拖拽开始时被调用，记录当前点的索引和位置，并创建临时线条用于连接前后点。
-   * 需要找到与这个点相关的所有测量点、线、标签，并将它们添加到临时数组中。
-   * 在拖拽过程中，监听鼠标move方法，更新临时点的位置，并根据当前点的索引更新临时线条的几何体、更新标签位置、重新计算长度等。
-   * @param point 拖拽的点.
-   */
-  dragPointStart(point: THREE.Mesh) {
-    this.group = point.parent as THREE.Group
-    this.isCompleted = false
-
-    // 获取当前拖拽点的索引
-    this.draggingIndex = point.userData.pointIndex
-    this.originalPosition.copy(point.position)
-
-    // 收集相关联的线段和标签
-    this.connectedLines = []
-    this.connectedLabels = []
-
-    // 遍历group查找相关线段和标签
-    this.group.children.forEach(child => {
-      // 处理线段
-      if (child.name === MeasureTool.LINE_NAME && child.userData.pointIndices) {
-        const [startIdx, endIdx] = child.userData.pointIndices
-        if (startIdx === this.draggingIndex || endIdx === this.draggingIndex) {
-          this.connectedLines.push(child as THREE.Line)
-        }
-      }
-
-      // 处理标签
-      if (child.name === MeasureTool.LABEL_NAME && child.userData.pointIndices) {
-        const [startIdx, endIdx] = child.userData.pointIndices
-        if (startIdx === this.draggingIndex || endIdx === this.draggingIndex) {
-          this.connectedLabels.push(child as CSS2DObject)
-        }
-      }
-    })
-
-    // 监听move事件
-    pmFn = this.redrawMousemove.bind(this)
-    this.canvas.addEventListener('pointermove', pmFn)
-
-    console.log('connectedLines:', this.connectedLines)
-    console.log('connectedLabels:', this.connectedLabels)
-
-    // 这个方法会在拖拽开始时被调用，记录当前点的索引和位置，
-    // 需要找到与这个点相关的所有测量点、线、标签，并将它们添加到临时数组中。
-    // 并创建临时线条用于连接前后点。
-  }
-
 
-  /**
-   * 重绘监听鼠标移动
-   */
-  redrawMousemove(e: MouseEvent) {
-    if (this.draggingIndex === -1) return
-
-    let newPosition = this.viewport.getClosestIntersection(e)
-    // 更新点数组中的坐标
-    this.pointArray[this.draggingIndex].copy(newPosition)
-
-    // 更新所有相关线段
-    this.connectedLines.forEach(line => {
-      const [startIdx, endIdx] = line.userData.pointIndices
-      const startPoint = this.pointArray[startIdx]
-      const endPoint = this.pointArray[endIdx]
-
-      // 更新线段几何体
-      const geometry = line.geometry as THREE.BufferGeometry
-      geometry.setFromPoints([startPoint, endPoint])
-      geometry.attributes.position.needsUpdate = true
-    })
-
-    // 更新所有相关标签
-    this.connectedLabels.forEach(label => {
-      const [startIdx, endIdx] = label.userData.pointIndices
-      const startPoint = this.pointArray[startIdx]
-      const endPoint = this.pointArray[endIdx]
-
-      // 计算中间位置和距离
-      const midPoint = new THREE.Vector3()
-        .addVectors(startPoint, endPoint)
-        .multiplyScalar(0.5)
-      const distance = startPoint.distanceTo(endPoint)
-
-      // 更新标签位置和内容
-      label.position.copy(midPoint)
-      label.element.innerHTML = `${numberToString(distance)} ${getUnitString(this.mode)}`
-    })
-
-    // 更新点的可视化位置
-    const pointObj = this.group.children.find(child =>
-      child.userData.pointIndex === this.draggingIndex
-    ) as THREE.Mesh
-    if (pointObj) {
-      pointObj.position.copy(newPosition)
-    }
-    // 在拖拽过程中，监听鼠标move方法
-    // 更新临时点的位置，并根据当前点的索引更新临时线条的几何体、重新计算长度、更新标签位置等
-  }
-
-  /**
-   * 测量点被 DragControls 拖拽完成后触发这个方法
-   */
-  dragPointComplete() {
-
-    // 将临时点、线、标签添加到 group 中, 变成正式的测量
-
-    // 删除鼠标事件监听
-    this.canvas.removeEventListener('pointermove', pmFn)
-    pmFn = undefined
-  }
 }

src/model/ModelUtils.ts

@@ -2,6 +2,41 @@ import * as THREE from 'three'
 import type { ItemJson, ItemTypeDefineOption } from '@/model/itemType/ItemTypeDefine.ts'
 import { getAllItemTypes, getItemTypeByName } from '@/runtime/DefineItemType.ts'
 
+/**
+ * 在给定的场景中查找具有指定 uuid 的 Object3D 对象
+ */
+export function findObject3DById(scene: THREE.Object3D, uuid: string): THREE.Object3D | undefined {
+  const rets = findObject3DByCondition(scene, object => object.uuid === uuid)
+  if (rets.length > 0) {
+    return rets[0]
+  }
+  return undefined
+}
+
+/**
+ * 在给定场景中查找满足特定条件的 Object3D 对象集合
+ */
+export function findObject3DByCondition(scene: THREE.Object3D, condition: (object: THREE.Object3D) => boolean): THREE.Object3D[] {
+  const foundObjects: THREE.Object3D[] = []
+
+  // 定义一个内部递归函数来遍历每个节点及其子节点
+  function traverse(obj: THREE.Object3D) {
+    if (condition(obj)) {
+      foundObjects.push(obj)
+    }
+
+    // 遍历当前对象的所有子对象
+    for (let i = 0; i < obj.children.length; i++) {
+      traverse(obj.children[i])
+    }
+  }
+
+  // 开始从场景根节点进行遍历
+  traverse(scene)
+
+  return foundObjects
+}
+
 export function loadSceneFromJson(scene: THREE.Scene, items: ItemJson[]) {
   console.time('loadSceneFromJson')
   const object3ds = loadObject3DFromJson(items)

src/model/example1.js

@@ -43,7 +43,7 @@ export default {
               t: 'measure', a: 'ln', l: '测量2', c: '#ff0000',
               tf: [[-9.0, 0, 3], [0, 0, 0], [0.25, 0.1, 0.25]],
               dt: {
-                link: ['p3']
+                link: ['p3', 'p4']
               }
             },
             {
@@ -53,6 +53,14 @@ export default {
               dt: {
                 link: []
               }
+            },
+            {
+              id: 'p4',
+              t: 'measure', a: 'ln', l: '测量3', c: '#ff0000',
+              tf: [[-9.0, 0, 8], [0, 0, 0], [0.25, 0.1, 0.25]],
+              dt: {
+                link: []
+              }
             }
           ]
         }

src/model/itemType/ItemTypeBase.ts

@@ -2,8 +2,15 @@ import { type Object3D } from 'three'
 import type WorldModel from '@/model/WorldModel.ts'
 import type { ItemJson, ItemTypeDefineOption } from '@/model/itemType/ItemTypeDefine.ts'
 import * as THREE from 'three'
+import type Viewport from '@/designer/Viewport.ts'
 
 export default abstract class ItemTypeBase {
+
+  /**
+   * 所有点的数组
+   */
+  pointArray: THREE.Object3D[] = []
+
   name: string
   option: ItemTypeDefineOption
   worldModel: WorldModel
@@ -26,4 +33,21 @@ export default abstract class ItemTypeBase {
    */
   afterAddScene(scene: THREE.Scene, objects: THREE.Object3D[]): void {
   }
+
+  /**
+   * 添加到 viewport 后的回调
+   */
+  afterAddViewport(viewport: Viewport): void {
+    viewport.dragControl.setDragObjects(this.pointArray, 'push')
+  }
+
+  /**
+   * EsDragControls 开始拖拽某个点时的回调
+   */
+  abstract dragPointStart(viewport: Viewport, point: THREE.Mesh)
+
+  /**
+   * EsDragControls 拖拽完成（放开鼠标）时的回调
+   */
+  abstract dragPointComplete(viewport: Viewport)
 }

src/model/itemType/ItemTypeLineBase.ts

@@ -2,40 +2,79 @@ import * as THREE from 'three'
 import ItemTypeBase from '@/model/itemType/ItemTypeBase.ts'
 import type { ItemJson } from '@/model/itemType/ItemTypeDefine.ts'
 import type WorldModel from '@/model/WorldModel.ts'
+import type Viewport from '@/designer/Viewport.ts'
+import { findObject3DByCondition, findObject3DById } from '@/model/ModelUtils.ts'
+
+let pmFn
 
 /**
  * ILineType 接口定义了线类型的基本方法
- * 用于创建点和线
+ * 用于创建点和线, 以及处理拖拽事件, 以及交互事件
  */
 export default abstract class ItemTypeLineBase extends ItemTypeBase {
+  private relationPoints: THREE.Mesh[] = []
+  private dragViewport: Viewport | undefined
+  private dragPoint: THREE.Mesh | undefined
 
-  /**
-   * 所有点的数组
-   */
-  pointArray: THREE.Object3D[] = []
+  abstract createPointBasic(position: THREE.Vector3): THREE.Object3D
 
-  /**
-   * 所有连接线的数组
-   */
-  linkArray: THREE.Object3D[] = []
+  abstract createLineBasic(): THREE.Line
 
   public init(worldModel: WorldModel) {
     return super.init(worldModel).then(() => {
-      // 初始化方法，子类可以重写
-      this.pointArray.length = 0
-      this.linkArray.length = 0
     })
   }
 
   afterLoadGroup(group: THREE.Group): void {
   }
 
-  afterLoadLine(line: THREE.Line): void {
+  afterCreateLine(line: THREE.Line, startPoint: THREE.Object3D, endPoint: THREE.Object3D): void {
   }
 
   afterLoadPoint(point: THREE.Object3D): void {
   }
 
+  afterUpdatePoint(point: THREE.Object3D, updatedLines: THREE.Object3D[]): void {
+  }
+
+  afterUpdateLine(line: THREE.Line, startPoint: THREE.Object3D, endPoint: THREE.Object3D): void {
+  }
+
+  createLine(scene: THREE.Scene, startPoint: THREE.Object3D, endPoint: THREE.Object3D): THREE.Line {
+    const line = this.createLineBasic()
+    const geom = line.geometry
+    geom.setFromPoints([startPoint.position, endPoint.position])
+
+    if (!line.userData) {
+      line.userData = {}
+    }
+    line.userData.lineStartId = startPoint.uuid
+    line.userData.lineEndId = endPoint.uuid
+
+    if (startPoint.parent) {
+      startPoint.parent.add(line)
+    } else {
+      scene.add(line)
+    }
+
+    if (!startPoint.userData.lines) {
+      startPoint.userData.lines = []
+    }
+    startPoint.userData.lines.push(line.uuid)
+
+    if (!endPoint.userData.lines) {
+      endPoint.userData.lines = []
+    }
+    endPoint.userData.lines.push(line.uuid)
+
+    this.afterCreateLine(line, startPoint, endPoint)
+
+    return line
+  }
+
+  /**
+   * 所有点数据加载完成后，添加进场景之后，需要根据 link 数组创建连接线
+   */
   afterAddScene(scene: THREE.Scene, objects: THREE.Object3D[]) {
     super.afterAddScene(scene, objects)
 
@@ -49,28 +88,43 @@ export default abstract class ItemTypeLineBase extends ItemTypeBase {
       for (let j = 0; j < linkArray.length; j++) {
         const linkId = linkArray[j]
         // 在 pointArray 中查找对应的点
-        const endPoint = this.pointArray.find(p => p.uuid === linkId)
+        const endPoint = findObject3DById(scene, linkId)
         if (!endPoint) {
           console.warn('not found link point uuid=${}', linkId)
           continue
         }
 
-        const line = this.createLine()
-        const geom = line.geometry
-        geom.setFromPoints([startPoint.position, endPoint.position])
-
-        if (startPoint.parent) {
-          startPoint.parent.add(line)
-        } else {
-          scene.add(line)
-        }
-
-        this.afterLoadLine(line)
-        this.linkArray.push(line)
+        const line = this.createLine(scene, startPoint, endPoint)
       }
     }
   }
 
+  createPoint(position: THREE.Vector3, item: ItemJson): THREE.Object3D {
+    const point = this.createPointBasic(position)
+    point.name = item.name
+    point.uuid = item.id || THREE.MathUtils.generateUUID()
+    point.userData = _.cloneDeep(item.dt) || {}
+    point.userData.type = item.t
+    point.userData.actionType = item.a
+    point.userData.label = item.l
+    point.userData.color = item.c
+
+    point.rotation.set(
+      THREE.MathUtils.degToRad(item.tf[1][0]),
+      THREE.MathUtils.degToRad(item.tf[1][1]),
+      THREE.MathUtils.degToRad(item.tf[1][2])
+    )
+
+    point.scale.set(item.tf[2][0], item.tf[2][1], item.tf[2][2])
+    this.pointArray.push(point)
+
+    this.afterLoadPoint(point)
+    return point
+  }
+
+  /**
+   * 从 Json 某个 item 加载数据
+   */
   override loadFromJson(item: ItemJson): undefined | THREE.Object3D {
     if (item.a === 'gp') {
       // gp 是为了分组而存在的
@@ -95,32 +149,97 @@ export default abstract class ItemTypeLineBase extends ItemTypeBase {
         item.tf[0][2]
       )
 
-      const point = this.createPoint(position)
-      point.name = item.name
-      point.uuid = item.id || THREE.MathUtils.generateUUID()
-      point.userData = _.cloneDeep(item.dt) || {}
-      point.userData.type = item.t
-      point.userData.actionType = item.a
-      point.userData.label = item.l
-      point.userData.color = item.c
-
-      point.rotation.set(
-        THREE.MathUtils.degToRad(item.tf[1][0]),
-        THREE.MathUtils.degToRad(item.tf[1][1]),
-        THREE.MathUtils.degToRad(item.tf[1][2])
-      )
-
-      point.scale.set(item.tf[2][0], item.tf[2][1], item.tf[2][2])
-      this.pointArray.push(point)
-
-      this.afterLoadPoint(point)
-      return point
+      return this.createPoint(position, item)
     }
 
     console.error('ItemTypeLineBase.loadFromJson: Unsupported', item)
   }
 
-  abstract createPoint(position: THREE.Vector3): THREE.Object3D
 
-  abstract createLine(): THREE.Line
+  /**
+   * 被 DragControls 拖拽时触发这个方法
+   */
+  dragPointStart(viewport: Viewport, point: THREE.Mesh) {
+    console.log('dragPoint:', point)
+    this.dragViewport = viewport
+    this.dragPoint = point
+    const canvas = viewport.renderer.domElement
+
+    // 收集相关联的线段和标签
+    const relationPoints = new Set<THREE.Object3D>()
+
+    // 找到与 point 有关联的节点, 无论是 a->b 还是 b->a 都需要收集
+    findObject3DByCondition(viewport.scene, (targetObj: THREE.Object3D) => {
+      if (targetObj.uuid === point.uuid) {
+        return false
+      }
+
+      // 无论 a->b 还是 b->a 都需要收集
+      if (_.includes(targetObj.userData?.link, point.uuid) || _.includes(point.userData?.link, targetObj.uuid)) {
+        relationPoints.add(targetObj)
+      }
+    })
+
+    //@ts-ignore
+    this.relationPoints = Array.from(relationPoints)
+
+    // 监听move事件
+    pmFn = this.redrawMousemove.bind(this)
+    canvas.addEventListener('pointermove', pmFn)
+  }
+
+  /**
+   * DragControls 拖拽过程中鼠标移动时触发这个方法
+   */
+  redrawMousemove(e: MouseEvent) {
+    if (!this.dragViewport || !this.dragPoint) return
+
+    const updateLines: THREE.Object3D[] = []
+    // 更新所有相关线段
+    _.forEach(this.relationPoints, (targetPoint, idx) => {
+      if (targetPoint.uuid === this.dragPoint.uuid) {
+        return
+      }
+
+      // 判断谁是起点，谁是终点
+      let startPoint: THREE.Object3D
+      let endPoint: THREE.Object3D
+      if (_.includes(targetPoint.userData?.link, this.dragPoint.uuid)) {
+        startPoint = targetPoint
+        endPoint = this.dragPoint
+
+      } else {
+        startPoint = this.dragPoint
+        endPoint = targetPoint
+      }
+
+      // 找到 startPoint 与 this.dragPoint 之间的线段
+      let line = findObject3DByCondition(this.dragViewport.scene, (obj) => {
+        return obj.userData.lineStartId === startPoint.uuid && obj.userData.lineEndId === endPoint.uuid
+      })[0] as THREE.Line
+
+      if (!line) {
+        line = this.createLine(this.dragViewport.scene, startPoint, endPoint)
+      }
+
+      // 更新线段几何体
+      const geometry = line.geometry as THREE.BufferGeometry
+      geometry.setFromPoints([startPoint.position, endPoint.position])
+      geometry.attributes.position.needsUpdate = true
+      this.afterUpdateLine(line, startPoint, endPoint)
+
+      updateLines.push(line)
+    })
+
+    this.afterUpdatePoint(this.dragPoint, updateLines)
+  }
+
+  /**
+   * DragControls 拖拽完成后触发这个方法
+   */
+  dragPointComplete(viewport: Viewport) {
+    // 删除鼠标事件监听
+    viewport.renderer.domElement.removeEventListener('pointermove', pmFn)
+    pmFn = undefined
+  }
 }

src/model/itemType/measure/Measure.ts

@@ -2,6 +2,10 @@ import * as THREE from 'three'
 import ItemTypeLineBase from '@/model/itemType/ItemTypeLineBase.ts'
 import { Material, Object3D, Scene } from 'three'
 import WorldModel from '@/model/WorldModel.ts'
+import { CSS2DObject } from 'three/examples/jsm/renderers/CSS2DRenderer'
+import Constract from '@/designer/Constract.ts'
+import { numberToString } from '@/utils/webutils.ts'
+import { findObject3DById } from '@/model/ModelUtils.ts'
 
 export const GROUP_NAME = 'measure-group'
 export const POINT_NAME = 'measure_point'
@@ -39,11 +43,6 @@ export default class Measure extends ItemTypeLineBase {
     return Promise.resolve()
   }
 
-  // 创建完线之后，创建 label
-  afterLoadLine(line: THREE.Line) {
-    super.afterLoadLine(line)
-  }
-
 
   afterLoadGroup(group: THREE.Group) {
     super.afterLoadGroup(group)
@@ -67,7 +66,7 @@ export default class Measure extends ItemTypeLineBase {
   /**
    * 创建测量点
    */
-  createPoint(position?: THREE.Vector3): THREE.Object3D {
+  createPointBasic(position?: THREE.Vector3): THREE.Object3D {
     const p = position
     const scale = 0.25
 
@@ -84,7 +83,7 @@ export default class Measure extends ItemTypeLineBase {
   /**
    * 创建测量线
    */
-  createLine(): THREE.Line {
+  createLineBasic(): THREE.Line {
     const geom = new THREE.BufferGeometry()
     const obj = new THREE.Line(geom, this.lineMaterial)
     obj.frustumCulled = false
@@ -92,4 +91,72 @@ export default class Measure extends ItemTypeLineBase {
     obj.uuid = THREE.MathUtils.generateUUID()
     return obj
   }
+
+  // 创建完线之后，创建 label
+  afterCreateLine(line: THREE.Line, startPoint: THREE.Object3D, endPoint: THREE.Object3D) {
+    super.afterCreateLine(line, startPoint, endPoint)
+
+    const p0 = startPoint.position
+    const p1 = endPoint.position
+
+    const dist = p0.distanceTo(p1)
+    const label = `${numberToString(dist)} m`
+
+    const position = new THREE.Vector3().addVectors(p0, p1).multiplyScalar(0.5)
+    const labelObj = this.createLabel(label)
+    labelObj.position.set(position.x, 0.1, position.z)
+    labelObj.element.innerHTML = label
+
+    line.userData.labelId = labelObj.uuid
+    this.group.add(labelObj)
+  }
+
+  afterUpdateLine(line: THREE.Line, startPoint: THREE.Object3D, endPoint: THREE.Object3D) {
+    super.afterUpdateLine(line, startPoint, endPoint)
+
+    const p0 = startPoint.position
+    const p1 = endPoint.position
+
+    const dist = p0.distanceTo(p1)
+    const label = `${numberToString(dist)} 米`
+    const position = new THREE.Vector3().addVectors(p0, p1).multiplyScalar(0.5)
+
+    const labelObj: CSS2DObject = findObject3DById(this.group, line.userData.labelId) as CSS2DObject
+    if (labelObj) {
+      labelObj.position.set(position.x, 0.1, position.z)
+      labelObj.element.innerHTML = label
+
+    } else {
+      // 如果没有找到，则创建新的标签
+      const newLabelObj = this.createLabel(label)
+      newLabelObj.position.set(position.x, position.y, position.z)
+      newLabelObj.element.innerHTML = label
+      line.userData.labelId = labelObj.uuid
+      this.group.add(newLabelObj)
+    }
+  }
+
+  /**
+   * 创建标签
+   */
+  createLabel(text: string): CSS2DObject {
+    const div = document.createElement('div')
+    div.className = 'css2dObjectLabel'
+    div.innerHTML = text
+    div.style.padding = '5px 8px'
+    div.style.color = '#fff'
+    div.style.fontSize = '14px'
+    div.style.position = 'absolute'
+    div.style.backgroundColor = 'rgba(25, 25, 25, 0.3)'
+    div.style.borderRadius = '12px'
+    div.style.top = '0px'
+    div.style.left = '0px'
+    // div.style.pointerEvents = 'none' //避免HTML元素影响场景的鼠标事件
+    const obj = new CSS2DObject(div)
+    obj.name = LABEL_NAME
+    obj.userData = {
+      type: Constract.MeasureLabel
+    }
+    return obj
+  }
 }