Function pj_fwd

src/fwd.cpp:185–218

}

PJ_XY pj_fwd(PJ_LP lp, PJ *P) {
    PJ_COORD coo = {{0, 0, 0, 0}};
    coo.lp = lp;

    const int last_errno = P->ctx->last_errno;
    P->ctx->last_errno = 0;

    if (!P->skip_fwd_prepare)
        fwd_prepare(P, coo);
    if (HUGE_VAL == coo.v[0] || HUGE_VAL == coo.v[1])
        return proj_coord_error().xy;

    /* Do the transformation, using the lowest dimensional transformer available
     */
    if (P->fwd) {
        const auto xy = P->fwd(coo.lp, P);
        coo.xy = xy;
    } else if (P->fwd3d) {
        const auto xyz = P->fwd3d(coo.lpz, P);
        coo.xyz = xyz;
    } else if (P->fwd4d)
        P->fwd4d(coo, P);
    else {
        proj_errno_set(P, PROJ_ERR_OTHER_NO_INVERSE_OP);
        return proj_coord_error().xy;
    }
    if (HUGE_VAL == coo.v[0])
        return proj_coord_error().xy;

    if (!P->skip_fwd_finalize)
        fwd_finalize(P, coo);

    return error_or_coord(P, coo, last_errno).xy;
}

PJ_XYZ pj_fwd3d(PJ_LPZ lpz, PJ *P) {
    PJ_COORD coo = {{0, 0, 0, 0}};