API Reference > geometry-core > CartesianGeometry > Vector3d > rotate90Around rotate90Around Method Rotate this vector 90 degrees around an axis vector. rotate90Around(axis: Vector3d, result?: Vector3d): undefined | Vector3d Parameter Type Description axis Vector3d result Vector3d Returns - undefined | Vector3d the (new or optionally reused result) rotated vector, or undefined if the axis vector cannot be normalized. Defined in geometry3d/Point3dVector3d.ts Line 887 Last Updated: 11 June, 2024