API Reference > imodeljs-common > Geometry > GeometryStreamBuilder > appendGeometryPart3d appendGeometryPart3d Method Append a GeometryPart instance with relative position, orientation, and scale to a GeometryStreamProps array for creating a GeometricElement3d. Not valid when defining a GeometryPart as nesting of parts is not supported. appendGeometryPart3d(partId: string, instanceOrigin?: Point3d, instanceRotation?: YawPitchRollAngles, instanceScale?: number): boolean Parameter Type Description partId string instanceOrigin Point3d instanceRotation YawPitchRollAngles instanceScale number Returns - boolean Defined in core/common/src/geometry/GeometryStream.ts Line 289 Last Updated: 11 June, 2024