API Reference > geometry-core > ArraysAndInterfaces > Point3dArrayCarrier > getVector3dAtCheckedVectorIndex getVector3dAtCheckedVectorIndex Method Access by index, returning strongly typed Vector3d getVector3dAtCheckedVectorIndex(index: number, result?: Vector3d): Vector3d | undefined Parameter Type Description index number index of point within the array result Vector3d caller-allocated destination Returns - Vector3d | undefined undefined if the index is out of bounds Defined in core/geometry/src/geometry3d/Point3dArrayCarrier.ts Line 61 Last Updated: 13 June, 2024