Function GetFace

src/projections/s2.cpp:226–243

}

inline int GetFace(const PJ_XYZ &p) {
    int face = LargestAbsComponent(p);
    double pFace;
    switch (face) {
    case 0:
        pFace = p.x;
        break;
    case 1:
        pFace = p.y;
        break;
    default:
        pFace = p.z;
        break;
    }
    if (pFace < 0)
        face += 3;
    return face;
}

inline int XYZtoFaceUV(const PJ_XYZ &p, double *pu, double *pv) {
    int face = GetFace(p);