无情编码机器

forge viewer部件异常移动应该如何解决？

我的本意是想让整块部件往x轴方向移动，但是当我获取他们的位置的时候，部分部件就会偏移原来的位置，移动到异常的地方 以下是我的部分代码： 这个是初始化代码 /* 连接入口 */ // 设置模型交互的方法 const setupModelInteraction = () => { tree = viewer.model.getData().instanceTree; const partNamesList = { basePart: ["T1"], Part: ["X1", "X2", "X3", "X5", "X6", "X12", "X13", "Z1", "Z2"] } const nodeIds = getModelNodeIds(partNamesList); baseRodPivot = createPivot(nodeIds.T1NodeId); // 获取除basePart外的所有部件名称 const nonBasePartNames = Object.keys(partNamesList) .filter(key => key !== 'basePart') // 排除基础部件 .flatMap(key => partNamesList[key]); // 展平名称数组 // 为每个非基础部件创建辅助对象 const helperObjects = nonBasePartNames.map(name => createHelper(nodeIds[`${name}NodeId`], baseRodPivot.position)); //添加非基础件部件 addHelpersToPivot(baseRodPivot, helperObjects); initializeRotation(helperObjects, nodeIds); }; /* 运动入口 */ // 初始化旋转的方法，接收辅助对象和节点ID对象作为参数 const initializeRotation = (helperObjects, nodeIds) => { const partSuffixes = { linePart: { x: ["X1", "X2", "X3", "X5", "X6", "X12", "X13"], z: ["Z1", "Z2"] }, }; // 获取辅助对象和节点ID的对应关系 const helperNodeIdPairs = getHelperNodeIdPairs(partSuffixes, helperObjects, nodeIds); console.log(helperNodeIdPairs) startRotationAnimation(helperNodeIdPairs); }; 上下文：(就是在applyHelpersTransformations这个函数之后就会出现问题） // 应用辅助对象变换的方法，接收辅助对象和节点ID对象作为参数 const applyHelpersTransformations = (helperNodeIdPairs) => { for (const pair of helperNodeIdPairs) { assignTransformations(pair.helper, pair.id); } }; // 动画辅助对象的方法，接收一个包含基准点、辅助对象、X轴偏移量、Z轴偏移量的对象作为参数 const animateHelpers = ({ helperNodeIdPairs, xOffsetAmount, zOffsetAmount }) => { const render = () => { const positions = calculateHelpersNewPositions(helperNodeIdPairs, xOffsetAmount, zOffsetAmount); updateHelpersPositions(helperNodeIdPairs, positions); applyHelpersTransformations(helperNodeIdPairs); viewer.impl.sceneUpdated(true); requestAnimationFrame(render); }; render(); }; 核心代码： // 辅助函数 const assignTransformations = (refererence_dummy, nodeId) => { refererence_dummy.parent.updateMatrixWorld(); const position = new THREE.Vector3(); const rotation = new THREE.Quaternion(); const scale = new THREE.Vector3(); refererence_dummy.matrixWorld.decompose(position, rotation, scale); tree.enumNodeFragments(nodeId, (frag) => { const fragProxy = viewer.impl.getFragmentProxy(viewer.model, frag); fragProxy.getAnimTransform(); fragProxy.position = position; fragProxy.quaternion = rotation; fragProxy.updateAnimTransform(); }); } const findNodeIdbyName = (name) => { let nodeList = Object.values(tree.nodeAccess.dbIdToIndex); for (let i = 1, len = nodeList.length; i { let result = { fragId: [], matrix: [], }; tree.enumNodeFragments(nodeId, (frag) => { let fragProxy = viewer.impl.getFragmentProxy(viewer.model, frag); let matrix = new THREE.Matrix4(); fragProxy.getWorldMatrix(matrix); result.fragId.push(frag); result.matrix.push(matrix); }); return result; } 我想要知道fusion360建出来的模型应该如何获取他们的位置，为什么这个代码获取出来的部分位置是错误的

777七月

为什么这段代码运行的时候点击部件会出现错误?

我运行这段代码的时候，点击部件就会出现 Uncaught TypeError: Cannot read properties of undefined (reading 'position')at VertexEnumerator.js:87:28 这样的错误 const options = { env: "AutodeskProduction", api: "derivativeV2", getAccessToken: (callback) => { fetch("http://localhost:8080/api/auth/token") .then((response) => response.json()) .then((json) => { const auth = json.access_token; callback(auth, 3600); }); }, language: 'en' }; Autodesk.Viewing.Initializer(options, () => { const urn = "dXJuOmFkc2sub2JqZWN0czpvcy5vYmplY3Q6ZmRzaGZqc19mZHNrZmxzal8xMjM0NTY2Ni8lRTQlQkElOTQlRTglQkQlQjQlRTYlOTYlOUMlRTclQkElQkYlRTYlQTglQTElRTUlOUUlOEIlMjB2My5mM2Q"; let htmlDiv = document.getElementById("MyViewerDiv"); viewer = new Autodesk.Viewing.GuiViewer3D(htmlDiv); viewer.start(); loadModel(urn); }); let loadModel = (urn) => { return new Promise((resolve, reject) => { function onDocumentLoadSuccess(doc) { const node = doc.getRoot().getDefaultGeometry(); viewer.loadDocumentNode(doc, node).then(() => { viewer.addEventListener( Autodesk.Viewing.GEOMETRY_LOADED_EVENT, setupModelInteraction ); }); resolve(); } Autodesk.Viewing.Document.load("urn:" + urn, onDocumentLoadSuccess, reject); }); }; const getModelNodeIds = (names, tree) => { const nodeIds = {}; names.forEach(name => { nodeIds[`${name}NodeId`] = findNodeIdbyName(name, tree); }); return nodeIds; }; const setupModelInteraction = () => { const partNames = ["T1", "X1", "Z1", "Z2"]; let tree = viewer.model.getData().instanceTree; let nodeIds = getModelNodeIds(partNames, tree); console.log(nodeIds) setUpPiovt(nodeIds, tree) } const setUpPiovt = (nodeIds, tree) => { baseRodPivot(nodeIds.T1NodeId, tree) } const baseRodPivot = (ID_BaseRod, tree) => { let Pivot_BaseRod = new THREE.Mesh(new THREE.BoxGeometry(5, 5, 5), new THREE.MeshBasicMaterial({ color: 0xff0000 })); let Position_BaseRod = getFragmentWorldMatrixByNodeId(ID_BaseRod, tree).matrix[0].getPosition().clone(); Pivot_BaseRod.position.x = Position_BaseRod.x; Pivot_BaseRod.position.y = Position_BaseRod.y; Pivot_BaseRod.position.z = Position_BaseRod.z; viewer.impl.scene.add(Pivot_BaseRod); }