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{\n BufferGeometry,\n EllipseCurve,\n FileLoader,\n Float32BufferAttribute,\n Group,\n Line,\n LineBasicMaterial,\n Loader,\n LoadingManager,\n Points,\n PointsMaterial,\n Vector2,\n Vector3,\n} from \"three\";\n\n/**\n * Entity attribute interface for IGES entities\n */\ninterface EntityAttribute {\n entityType: number;\n entityIndex?: number;\n igesVersion?: number;\n lineType?: number;\n level?: number;\n view?: number;\n transMatrix?: number;\n labelDisp?: number;\n status?: string;\n sequenceNumber?: number;\n lineWidth?: number;\n color?: number;\n paramLine?: number;\n formNumber?: number;\n entityName?: string;\n entitySub?: number;\n}\n\n/**\n * Entity parameter type - can be string or number\n */\ntype EntityParam = string | number;\n\n/**\n * IGES Entity class\n */\nclass Entity {\n type: string;\n attr: EntityAttribute;\n params: EntityParam[];\n\n constructor(attribute: EntityAttribute = { entityType: 0 }, params: EntityParam[] = []) {\n this.type = attribute.entityType.toString();\n this.attr = attribute;\n this.params = params;\n }\n}\n\n/**\n * IGES file structure interface\n */\ninterface IGESData {\n fieldDelimiter: string;\n termDelimiter: string;\n entities: Entity[];\n comment?: string;\n exportID?: string;\n fileName?: string;\n systemID?: string;\n translateVer?: string;\n integerBits?: string;\n singleExpBits?: string;\n singleMantissaBits?: string;\n doubleExpBits?: string;\n doubleMantissaBits?: string;\n receiveID?: string;\n scale?: string;\n unitFlag?: string;\n unit?: string;\n maxStep?: string;\n maxWidth?: string;\n createDate?: string;\n resolution?: string;\n maxValue?: string;\n createUser?: string;\n createOrg?: string;\n igesVer?: string;\n formatCode?: string;\n lastModifiedDate?: string;\n lineNum_S?: number;\n lineNum_G?: number;\n lineNum_D?: number;\n lineNum_P?: number;\n}\n\n/**\n * Description: A THREE loader for IGES files, as created by Solidworks and other CAD programs.\n *\n * @see https://wiki.eclipse.org/IGES_file_Specification\n * @see https://web.archive.org/web/20120821190122/http://www.uspro.org/documents/IGES5-3_forDownload.pdf\n * @see https://filemonger.com/specs/igs/devdept.com/version6.pdf - IGES Version 6.0\n * @see https://en.wikipedia.org/wiki/IGES - More info on IGES\n *\n * @example\n * ```typescript\n * const loader = new IGESLoader();\n * loader.load('/path/to/file.igs', (geometry) => {\n * scene.add(geometry);\n * });\n * ```\n */\nclass IGESLoader extends Loader {\n constructor(manager?: LoadingManager) {\n super(manager);\n }\n\n /**\n * Load an IGES file from a URL\n * @param url - The URL or path to the IGES file\n * @param onLoad - Callback when loading is complete\n * @param onProgress - Callback for loading progress\n * @param onError - Callback when an error occurs\n */\n override load(\n url: string,\n onLoad: (geometry: Group) => void,\n onProgress?: (event: ProgressEvent) => void,\n onError?: (event: unknown) => void\n ): void {\n const loader = new FileLoader(this.manager);\n loader.setPath(this.path);\n loader.setResponseType(\"text\");\n\n loader.load(\n url,\n (text: unknown) => {\n try {\n onLoad(this.parse(text as string));\n } catch (e) {\n if (onError) {\n onError(e instanceof Error ? e : new Error(String(e)));\n } else {\n console.error(e);\n }\n this.manager.itemError(url);\n }\n },\n onProgress,\n onError\n );\n }\n\n /**\n * Parse IGES file content\n * @param data - The IGES file content as string\n * @returns A Three.js Group containing the parsed geometry\n */\n parse(data: string): Group {\n class IGES implements IGESData {\n fieldDelimiter = \",\"; // as default\n termDelimiter = \";\"; // as default\n entities: Entity[] = [];\n comment?: string;\n exportID?: string;\n fileName?: string;\n systemID?: string;\n translateVer?: string;\n integerBits?: string;\n singleExpBits?: string;\n singleMantissaBits?: string;\n doubleExpBits?: string;\n doubleMantissaBits?: string;\n receiveID?: string;\n scale?: string;\n unitFlag?: string;\n unit?: string;\n maxStep?: string;\n maxWidth?: string;\n createDate?: string;\n resolution?: string;\n maxValue?: string;\n createUser?: string;\n createOrg?: string;\n igesVer?: string;\n formatCode?: string;\n lastModifiedDate?: string;\n lineNum_S?: number;\n lineNum_G?: number;\n lineNum_D?: number;\n lineNum_P?: number;\n\n parseStart(data: string): void {\n this.comment = data;\n }\n\n parseGlobal(data: string): void {\n if (data[0] !== \",\") {\n this.fieldDelimiter = parseIgesString(data) || \",\";\n }\n const fields = data.split(this.fieldDelimiter);\n if (data[0] !== \",\") {\n fields.splice(0, 1);\n }\n\n this.termDelimiter = parseIgesString(fields[1] ?? \"\") || \";\";\n this.exportID = parseIgesString(fields[2] ?? \"\");\n this.fileName = parseIgesString(fields[3] ?? \"\");\n this.systemID = parseIgesString(fields[4] ?? \"\");\n this.translateVer = parseIgesString(fields[5] ?? \"\");\n this.integerBits = fields[6];\n this.singleExpBits = fields[7];\n this.singleMantissaBits = fields[8];\n this.doubleExpBits = fields[9];\n this.doubleMantissaBits = fields[10];\n this.receiveID = parseIgesString(fields[11] ?? \"\");\n this.scale = fields[12];\n this.unitFlag = fields[13];\n this.unit = parseIgesString(fields[14] ?? \"\");\n this.maxStep = fields[15];\n this.maxWidth = fields[16];\n this.createDate = parseIgesString(fields[17] ?? \"\");\n this.resolution = fields[18];\n this.maxValue = fields[19];\n this.createUser = parseIgesString(fields[20] ?? \"\");\n this.createOrg = parseIgesString(fields[21] ?? \"\");\n this.igesVer = fields[22];\n this.formatCode = fields[23];\n this.lastModifiedDate = parseIgesString(fields[24] ?? \"\");\n }\n\n parseDirection(data: string): void {\n for (let i = 0; i < data.length; i += 160) {\n const entity = new Entity();\n const attr = entity.attr;\n const item = data.substr(i, 160);\n attr.entityType = parseInt(item.substr(0, 8));\n attr.entityIndex = parseInt(item.substr(8, 8));\n attr.igesVersion = parseInt(item.substr(16, 8));\n attr.lineType = parseInt(item.substr(24, 8));\n attr.level = parseInt(item.substr(32, 8));\n attr.view = parseInt(item.substr(40, 8));\n attr.transMatrix = parseInt(item.substr(48, 8));\n attr.labelDisp = parseInt(item.substr(56, 8));\n attr.status = item.substr(64, 8);\n attr.sequenceNumber = parseInt(item.substr(73, 7));\n\n attr.lineWidth = parseInt(item.substr(88, 8));\n attr.color = parseInt(item.substr(96, 8));\n attr.paramLine = parseInt(item.substr(104, 8));\n attr.formNumber = parseInt(item.substr(112, 8));\n\n attr.entityName = item.substr(136, 8).trim();\n attr.entitySub = parseInt(item.substr(144, 8));\n\n this.entities.push(entity);\n }\n }\n\n parseParameter(data: string): void {\n const params = data.split(\";\");\n params.pop();\n const splitParams = params.map((item) => item.split(\",\"));\n\n for (let i = 0; i < splitParams.length; i++) {\n const entity = this.entities[i];\n if (entity) {\n const paramArray = splitParams[i];\n if (paramArray) {\n entity.type = paramArray.shift() || \"\";\n entity.params = paramArray.map(parseIgesFloat);\n }\n }\n }\n }\n\n parseTerminate(data: string): void {\n this.lineNum_S = parseInt(data.substr(1, 7));\n this.lineNum_G = parseInt(data.substr(9, 7));\n this.lineNum_D = parseInt(data.substr(17, 7));\n this.lineNum_P = parseInt(data.substr(25, 7));\n\n if (this.lineNum_D && this.entities.length !== this.lineNum_D / 2) {\n throw new Error(\"ERROR: Inconsistent entity count\");\n }\n }\n }\n\n function parseIges(data: string): Group {\n const geometry = new Group();\n geometry.name = \"Group_\" + Math.floor(Math.random() * 10000000);\n\n const iges = new IGES();\n\n // Split by newline and filter out completely empty lines\n // Don't trim before filtering as IGES lines can be space-padded\n const lines = data.split(/\\r?\\n/).filter((item) => item.length > 0);\n\n let currentSection = \"\";\n let startSec = \"\",\n globalSec = \"\",\n dirSec = \"\",\n paramSec = \"\",\n terminateSec = \"\";\n\n for (let i = 0; i < lines.length; i++) {\n let line = lines[i] ?? \"\";\n\n // Skip lines that are too short (less than 73 characters for valid IGES)\n if (line.length < 73) {\n console.warn(\n `Skipping invalid IGES line ${i}: line too short (${line.length} chars): \"${line.substring(0, 50)}\"`\n );\n continue;\n }\n\n currentSection = line[72] ?? \"\";\n line = line.substr(0, 80);\n\n switch (currentSection) {\n case \"S\": {\n startSec += line.substr(0, 72).trim();\n break;\n }\n case \"G\": {\n globalSec += line.substr(0, 72).trim();\n break;\n }\n case \"D\": {\n dirSec += line;\n break;\n }\n case \"P\": {\n paramSec += line.substr(0, 64).trim();\n break;\n }\n case \"T\": {\n terminateSec += line.substr(0, 72).trim();\n break;\n }\n default:\n console.warn(\n `Skipping line ${i} with unknown section type: '${currentSection}' (char code: ${currentSection.charCodeAt(0)})`\n );\n // Don't throw error, just skip unknown section types\n break;\n }\n }\n\n iges.parseStart(startSec);\n iges.parseGlobal(globalSec);\n iges.parseDirection(dirSec);\n iges.parseParameter(paramSec);\n iges.parseTerminate(terminateSec);\n\n const entities = iges.entities;\n\n /**\n * CIRCULAR ARC ENTITY (TYPE 100)\n *\n * Parameter Data\n *\n * Index Name Type Description\n * 1 ZT Real Parallel ZT displacement of arc from XT ; YT plane\n * 2 X1 Real Arc center abscissa\n * 3 Y1 Real Arc center ordinate\n * 4 X2 Real Start point abscissa\n * 5 Y2 Real Start point ordinate\n * 6 X3 Real Terminate point abscissa\n * 7 Y3 Real Terminate point ordinate\n */\n function drawCArc(entity: Entity): void {\n const entityParams = entity.params;\n\n const startVector = new Vector2(\n Number(entityParams[3]) - Number(entityParams[1]),\n Number(entityParams[4]) - Number(entityParams[2])\n );\n const endVector = new Vector2(\n Number(entityParams[5]) - Number(entityParams[1]),\n Number(entityParams[6]) - Number(entityParams[2])\n );\n\n const startAngle = startVector.angle();\n const endAngle = endVector.angle();\n\n const curve = new EllipseCurve(\n Number(entityParams[1]),\n Number(entityParams[2]), // ax, aY\n 1,\n 1, // xRadius, yRadius\n startAngle,\n endAngle, // aStartAngle, aEndAngle\n false, // aClockwise\n 0 // aRotation\n );\n\n const points = curve.getPoints(50);\n\n const geom = new BufferGeometry();\n geom.setFromPoints(points);\n\n const material = new LineBasicMaterial({ color: 0x0000ff });\n const mesh = new Line(geom, material);\n\n mesh.position.set(0, 0, 0);\n mesh.rotation.set(-Math.PI / 2, 0, 0);\n\n mesh.castShadow = true;\n mesh.receiveShadow = true;\n\n geometry.add(mesh);\n }\n\n /**\n * COMPOSITE CURVE ENTITY (TYPE 102)\n *\n * Parameter Data\n *\n * Index Name Type Description\n * 1 N Integer Number of entities\n * 2 DE(1) Pointer Pointer to the DE of the first constituent entity\n * ...\n * 1+N DE(N) Pointer Pointer to the DE of the last constituent entity\n */\n function drawCCurve(_entity: Entity): void {\n // TODO: Implement composite curve\n }\n\n /**\n * COPIOUS DATA ENTITY (TYPE 106, FORMS 1-3)\n * LINEAR PATH ENTITY (TYPE 106, FORMS 11-13)\n * CENTERLINE ENTITY (TYPE 106, FORMS 20-21)\n * SECTION ENTITY (TYPE 106, FORMS 31–38)\n * WITNESS LINE ENTITY (TYPE 106, FORM 40)\n * SIMPLE CLOSED PLANAR CURVE ENTITY (TYPE 106, FORM 63)\n */\n function drawPath(entity: Entity): void {\n const entityAttr = entity.attr;\n const entityParams = entity.params;\n\n const geom = new BufferGeometry();\n const points: Vector3[] = [];\n\n switch (entityAttr.formNumber?.toString()) {\n /**\n * LINEAR PATH ENTITY (TYPE 106, FORMS 11-13)\n *\n * For IP=2 (x,y,z triples), i.e., for Form 12:\n * Index Name Type Description\n * 1 IP Integer Interpretation Flag (1/2/3)\n * 2 N Integer Number of n-tuples; N >= 2\n * 3 X(1) Real First data point x value\n * 4 Y(1) Real First data point y value\n * 5 Z(1) Real First data point z value\n * ...\n * 2+3*N Z(N) Real Last data point z value\n */\n case \"12\":\n for (let i = 0; i < Number(entityParams[1]); i++) {\n points.push(\n new Vector3(\n Number(entityParams[2 + 3 * i]),\n Number(entityParams[3 + 3 * i]),\n Number(entityParams[4 + 3 * i])\n )\n );\n }\n break;\n /**\n * WITNESS LINE ENTITY (TYPE 106, FORM 40)\n *\n * Index Name Type Description\n * 1 IP Integer Interpretation Flag: IP = 1\n * 2 N Integer Number of data points: N ≥ 3 and odd\n * 3 ZT Real Common z displacement\n * 4 X(1) Real First data point abscissa\n * 5 Y(1) Real First data point ordinate\n * ...\n */\n case \"40\":\n for (let i = 0; i < Number(entityParams[1]); i++) {\n points.push(\n new Vector3(\n Number(entityParams[3 + 2 * i]),\n Number(entityParams[4 + 2 * i]),\n Number(entityParams[2])\n )\n );\n }\n break;\n\n case \"63\":\n for (let i = 0; i < Number(entityParams[1]); i++) {\n points.push(\n new Vector3(Number(entityParams[3 + 2 * i]), Number(entityParams[4 + 2 * i]), 0)\n );\n }\n break;\n\n default:\n console.log(\"Unsupported Form Number: \", entityAttr.formNumber);\n }\n\n geom.setFromPoints(points);\n\n const material = new LineBasicMaterial({ color: 0x0000ff });\n const mesh = new Line(geom, material);\n\n mesh.position.set(0, 0, 0);\n mesh.rotation.set(-Math.PI / 2, 0, 0);\n\n mesh.castShadow = true;\n mesh.receiveShadow = true;\n\n geometry.add(mesh);\n }\n\n /**\n * PLANE ENTITY (TYPE 108)\n *\n * Unbounded Plane Entity (Type 108, Form 0)\n */\n function drawPlane(_entity: Entity): void {\n // TODO: Implement plane entity\n }\n\n /**\n * LINE ENTITY (TYPE 110, FORM 0)\n * LINE ENTITY (TYPE 110, FORMS 1-2)\n */\n function drawLine(entity: Entity): void {\n const entityAttr = entity.attr;\n const entityParams = entity.params;\n\n const geom = new BufferGeometry();\n const points: Vector3[] = [];\n\n switch (entityAttr.formNumber?.toString()) {\n /**\n * LINE ENTITY (TYPE 110, FORMS 0)\n *\n * Index Name Type Description\n * 1 X1 Real Start Point P1\n * 2 Y1 Real\n * 3 Z1 Real\n * 4 X2 Real Terminate Point P2\n * 5 Y2 Real\n * 6 Z2 Real\n */\n case \"0\":\n case \"2\":\n points.push(\n new Vector3(Number(entityParams[0]), Number(entityParams[1]), Number(entityParams[2]))\n );\n points.push(\n new Vector3(Number(entityParams[3]), Number(entityParams[4]), Number(entityParams[5]))\n );\n break;\n\n default:\n if (isNaN(Number(entityAttr.formNumber))) {\n points.push(\n new Vector3(\n Number(entityParams[0]),\n Number(entityParams[1]),\n Number(entityParams[2])\n )\n );\n points.push(\n new Vector3(\n Number(entityParams[3]),\n Number(entityParams[4]),\n Number(entityParams[5])\n )\n );\n } else {\n console.log(\n \"LINE ENTITY - TYPE 110 - Unsupported Form Number: \",\n entityAttr.formNumber\n );\n }\n }\n\n geom.setFromPoints(points);\n\n const material = new LineBasicMaterial({ color: 0x0000ff });\n const mesh = new Line(geom, material);\n\n mesh.position.set(0, 0, 0);\n mesh.rotation.set(-Math.PI / 2, 0, 0);\n\n mesh.castShadow = true;\n mesh.receiveShadow = true;\n\n geometry.add(mesh);\n }\n\n /**\n * POINT ENTITY (TYPE 116)\n */\n function drawPoint(entity: Entity): void {\n const entityParams = entity.params;\n\n const geom = new BufferGeometry();\n\n const points: number[] = [];\n points.push(Number(entityParams[0]), Number(entityParams[1]), Number(entityParams[2]));\n\n geom.setAttribute(\"position\", new Float32BufferAttribute(points, 3));\n\n const material = new PointsMaterial({\n size: 5,\n sizeAttenuation: false,\n });\n const mesh = new Points(geom, material);\n\n mesh.position.set(0, 0, 0);\n mesh.rotation.set(-Math.PI / 2, 0, 0);\n\n mesh.castShadow = true;\n mesh.receiveShadow = true;\n\n geometry.add(mesh);\n }\n\n /**\n * SURFACE OF REVOLUTION ENTITY (TYPE 120)\n */\n function drawRSurface(_entity: Entity): void {\n // TODO: Implement surface of revolution\n }\n\n /**\n * TABULATED CYLINDER ENTITY (TYPE 122)\n */\n function drawTCylinder(_entity: Entity): void {\n // TODO: Implement tabulated cylinder\n }\n\n /**\n * TRANSFORMATION MATRIX ENTITY (TYPE 124)\n *\n * Parameter Data\n *\n * Index Name Type Description\n * 1 R11 Real Top Row\n * 2 R12 Real\n * 3 R13 Real\n * 4 T1 Real\n * 5 R21 Real Second Row\n * 6 R22 Real\n * 7 R23 Real\n * 8 T2 Real\n * 9 R31 Real Third Row\n * 10 R32 Real\n * 11 R33 Real\n * 12 T3 Real\n */\n function drawTransMatrix(entity: Entity): void {\n const entityAttr = entity.attr;\n\n switch (entityAttr.formNumber?.toString()) {\n /**\n * Form 0: (default) R is an orthonormal matrix with determinant equal to positive one.\n * T is arbitrary. The columns of R, taken in order, form a right-handed triple\n * in the output coordinate system.\n */\n case \"0\":\n // TODO: Implement transformation matrix\n break;\n default:\n console.log(\n \"TRANSFORMATION MATRIX - TYPE 124 - Unsupported Form Number: \",\n entityAttr.formNumber\n );\n }\n }\n\n /**\n * RATIONAL B-SPLINE CURVE ENTITY (TYPE 126)\n */\n function drawRBSplineCurve(entity: Entity): void {\n const entityAttr = entity.attr;\n const entityParams = entity.params;\n\n const geom = new BufferGeometry();\n const points: Vector3[] = [];\n\n const K = Number(entityParams[0]);\n const M = Number(entityParams[1]);\n const N = 1 + K - M;\n const A = N + 2 * M;\n\n switch (entityAttr.formNumber?.toString()) {\n /**\n * Form Meaning\n * 0 Form of curve is determined from the rational B-spline parameters\n * 1 Line\n * 2 Circular arc\n * 3 Elliptical arc\n * 4 Parabolic arc\n * 5 Hyperbolic arc\n */\n case \"0\":\n case \"1\":\n for (let i = 0; i < K + 1; i++) {\n points.push(\n new Vector3(\n Number(entityParams[i * 3 + 8 + A + K]),\n Number(entityParams[i * 3 + 9 + A + K]),\n Number(entityParams[i * 3 + 10 + A + K])\n )\n );\n }\n break;\n default:\n // TODO: Implement other B-spline forms\n }\n\n geom.setFromPoints(points);\n\n const material = new LineBasicMaterial({ color: 0x0000ff });\n const mesh = new Line(geom, material);\n\n mesh.position.set(0, 0, 0);\n mesh.rotation.set(-Math.PI / 2, 0, 0);\n\n mesh.castShadow = true;\n mesh.receiveShadow = true;\n\n geometry.add(mesh);\n }\n\n /**\n * RATIONAL B-SPLINE SURFACE ENTITY (TYPE 128)\n */\n function drawRBSplineSurface(_entity: Entity): void {\n // TODO: Implement B-spline surface\n }\n\n /**\n * CURVE ON A PARAMETRIC SURFACE ENTITY (TYPE 142)\n */\n function drawCurveOnPSurface(_entity: Entity): void {\n // TODO: Implement curve on parametric surface\n }\n\n /**\n * TRIMMED (PARAMETRIC) SURFACE ENTITY (TYPE 144)\n */\n function drawTPSurface(_entity: Entity): void {\n // TODO: Implement trimmed parametric surface\n }\n\n /**\n * GENERAL NOTE ENTITY (TYPE 212)\n */\n function drawGeneralNote(_entity: Entity): void {\n // TODO: Implement general note\n }\n\n /**\n * LEADER (ARROW) ENTITY (TYPE 214)\n */\n function drawLeaderArrow(_entity: Entity): void {\n // TODO: Implement leader arrow\n }\n\n /**\n * LINEAR DIMENSION ENTITY (TYPE 216)\n */\n function drawLinearDimension(_entity: Entity): void {\n // TODO: Implement linear dimension\n }\n\n /**\n * COLOR DEFINITION ENTITY (TYPE 314)\n */\n function drawColor(_entity: Entity): void {\n // TODO: Implement color definition\n }\n\n /**\n * ASSOCIATIVITY INSTANCE ENTITY (TYPE 402)\n */\n function drawAInstance(_entity: Entity): void {\n // TODO: Implement associativity instance\n }\n\n /**\n * PROPERTY ENTITY (TYPE 406)\n */\n function propertyEntity(_entity: Entity): void {\n // TODO: Implement property entity\n }\n\n // Process all entities\n for (const entity of entities) {\n switch (entity.type) {\n case \"100\":\n drawCArc(entity);\n break;\n case \"102\":\n drawCCurve(entity);\n break;\n case \"106\":\n drawPath(entity);\n break;\n case \"108\":\n drawPlane(entity);\n break;\n case \"110\":\n drawLine(entity);\n break;\n case \"116\":\n drawPoint(entity);\n break;\n case \"120\":\n drawRSurface(entity);\n break;\n case \"122\":\n drawTCylinder(entity);\n break;\n case \"124\":\n drawTransMatrix(entity);\n break;\n case \"126\":\n drawRBSplineCurve(entity);\n break;\n case \"128\":\n drawRBSplineSurface(entity);\n break;\n case \"142\":\n drawCurveOnPSurface(entity);\n break;\n case \"144\":\n drawTPSurface(entity);\n break;\n case \"212\":\n drawGeneralNote(entity);\n break;\n case \"214\":\n drawLeaderArrow(entity);\n break;\n case \"216\":\n drawLinearDimension(entity);\n break;\n case \"314\":\n drawColor(entity);\n break;\n case \"402\":\n drawAInstance(entity);\n break;\n case \"406\":\n propertyEntity(entity);\n break;\n default:\n console.log(\"Uncompliment entity type\", entity.type);\n }\n }\n\n return geometry;\n }\n\n function parseIgesFloat(p: string): number {\n return parseFloat(p.replace(/D/g, \"e\"));\n }\n\n function parseIgesString(str: string): string | undefined {\n try {\n const d = str.indexOf(\"H\");\n if (d === -1) return undefined;\n const digit = str.substr(0, d);\n const value = str.substr(d + 1, parseInt(digit));\n return value;\n } catch (e) {\n console.error(e);\n return undefined;\n }\n }\n\n return parseIges(data);\n }\n}\n\nexport { IGESLoader };\nexport type { EntityAttribute, EntityParam, IGESData };\n"]}