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): undefined | Vector3d 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 - undefined | Vector3d return true if indexA, indexB both valid Defined in geometry3d/Point3dArrayCarrier.ts Line 128 Last Updated: 12 June, 2024