Function GetOverlapSector

source/games/sw/src/player.cpp:3848–3915

//---------------------------------------------------------------------------

int GetOverlapSector(const DVector2& pos, sectortype** over, sectortype** under)
{
    int i, found = 0;
    sectortype* sf[3]= {nullptr,nullptr};                       // sectors found
    auto secto = *over;
    auto sectu = *under;

    if ((sectu->hasU() && sectu->number >= 30000) || (secto->hasU() && secto->number >= 30000))
        return GetOverlapSector2(pos, over, under);

    // instead of check ALL sectors, just check the two most likely first
    if (inside(pos.X, pos.Y, *over))
    {
        sf[found] = *over;
        found++;
    }

    if (inside(pos.X, pos.Y, *under))
    {
        sf[found] = *under;
        found++;
    }

    // if nothing was found, check them all
    if (found == 0)
    {
        for (auto& sect: sector)
        {
            if (inside(pos.X, pos.Y, &sect))
            {
                sf[found] = §
                found++;
                if (found > 2) return 0;
            }
        }
    }

    if (!found)
    {
        // Contrary to expectations, this *CAN* happen in valid scenarios and therefore should not abort.
        return 0;
    }

    PRODUCTION_ASSERT(found <= 2);

    // the are overlaping - check the z coord
    if (found == 2)
    {
        if (sf[0]->floorz > sf[1]->floorz)
        {
            *under = sf[0];
            *over = sf[1];
        }
        else
        {
            *under = sf[1];
            *over = sf[0];
        }