Why closed-source code is closed-source

This is an actual if statement from my gravity program:

if( (m_bRunEveryFrame || m_nFrameSkip <= 0) &&
    ((m_aTrail[i].planet == -2 && m_ship.alive ) ||
    sim.IsValidIndex(m_aTrail[i].planet) &&
    sim.p[m_aTrail[i].planet].alive &&
    (sim.nAlive == 2 || tCalm > 60 ||
    m_aTrail[i].planet == m_nCurPlanet ||
    m_aTrail[i].planet == m_nSecPlanet ||
    (sim.p[m_aTrail[i].planet].stable &&
    (sim.p[m_aTrail[i].planet].mass >= DUSTMASS*2 || sim.nAlive < 10)) )) )
{
    //do something
}
else
{
    //do something else
}

I think I may have a problem.