Not Carmack's, it says so in the link you provided. > The algorithm was originally attributed to John Carmack, but an investigation showed that the code had de

Not Carmack's, it says so in the link you provided. > The algorithm was originally attributed to John Carmack, but an investigation showed that the code had deeper roots in the hardware and software side of computer graphics. Adjustments and alterations passed through both Silicon Graphics and 3dfx Interactive, with the original constant being derived in a collaboration between Cleve Moler and Gregory Walsh, while Gregory worked for Ardent Computing in the late 1980s.[3] Walsh and Moler adapted their version from an unpublished paper by William Kahan and K.C. Ng circulated in May 1986.