Function det

src/projections/airocean.cpp:637–641

} // anonymous namespace

inline double det(const PJ_XYZ *u, const PJ_XYZ *v, const PJ_XYZ *w) {
    return (u->x * (v->y * w->z - v->z * w->y) -
            v->x * (u->y * w->z - u->z * w->y) +
            w->x * (u->y * v->z - u->z * v->y));
}

inline bool is_point_in_face(const PJ_XYZ *p, const pj_face *face) {
    return (det(p, &face->p2, &face->p3) <= 0 &&