API Reference > geometry-core > ArraysAndInterfaces > Point3dArrayCarrier > crossProductIndexIndexIndex crossProductIndexIndexIndex Method Return the cross product of vectors from point at originIndex to points at indexA and indexB crossProductIndexIndexIndex(originIndex: number, indexA: number, indexB: number, result?: Vector3d): Vector3d | undefined Parameter Type Description originIndex number index of origin 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 return true if indexA, indexB both valid Defined in core/geometry/src/geometry3d/Point3dArrayCarrier.ts Line 127 Last Updated: 13 June, 2024