Method UpdateMap

engine/Poseidon/AI/AICenterImplPreview.cpp:379–467

}

void AICenter::UpdateMap()
{
    //  due to bus limitation it is not possible to check all fields
    //  for dirty flag in every simulation cycle
    //  (it took 10-15% for 20fps when there were no dirty fields)
    //  limit dirty flag checking is important when there are little dirty fields
    int i;
    int n = TargetsPerCycle;
    for (i = 0; i < n; i++)
    {
        _map->ProcessChange();
    }

    n = FieldsPerCycle;
    int nRows = 16;
    int nAll = LandRange * LandRange;

    // finish row
    if (_column != 0)
    {
        bool dirty = false;
        for (i = 0; i < _column; i++)
        {
            if (_map->_dirty(i, _row) != 0)
            {
                dirty = true;
            }
        }

        while (_column != 0)
        {
            if (n <= 0 || nAll <= 0)
            {
                goto EndOfUpdateMap;
            }
            if (_map->_dirty(_column, _row) != 0)
            {
                UpdateField(_column, _row);
                n--;
            }
            _column = (_column + 1) & (LandRangeMask);
            nAll--;
        }
        if (!dirty)
        {
            _map->_dirtyRow[_row] = 0;
        }
        _row = (_row + 1) & (LandRangeMask);
        nRows--;
    }

    while (true)
    {
        AI_ERROR(_column == 0);
        if (n <= 0 || nRows <= 0 || nAll <= 0)
        {
            goto EndOfUpdateMap;
        }