API Reference > geometry-core > ArraysAndInterfaces > Point3dArrayCarrier > crossProductXYAndZIndexIndex crossProductXYAndZIndexIndex Method Return the cross product of vectors from origin to points at indexA and indexB crossProductXYAndZIndexIndex(origin: XYAndZ, indexA: number, indexB: number, result?: Vector3d): Vector3d | undefined Parameter Type Description origin XYAndZ origin for vector indexA number index of first target within the array indexB number index of second target within the array result Vector3d caller-allocated vector. Returns - Vector3d | undefined undefined if either index is out of bounds Defined in core/geometry/src/geometry3d/Point3dArrayCarrier.ts Line 114 Last Updated: 13 June, 2024