void GridManager::addThreat(UnitInfo& unit)
    {
        if (unit.getType().isWorker() && (!unit.unit()->exists() || (Terrain().isInAllyTerritory(unit.getTilePosition()) && (Broodwar->getFrameCount() - unit.getLastAttackFrame() > 500))))
            return;

        if (unit.getVisibleGroundStrength() <= 0.0 && unit.getVisibleAirStrength() <= 0.0)
            return;

        if (unit.getType() == UnitTypes::Protoss_Interceptor)
            return;

        // Speed multipled by 4.0 because we want WalkPositions per second
        // unit.getSpeed() returns pixels per frame
        // Walks/Second = speed * 24 / 8

        // Setup parameters
        int maxRange = int(max({ unit.getGroundRange(), unit.getAirRange(), 64.0 }) / 8.0);
        int speed = int(unit.getSpeed());
        int radius = maxRange + (speed * 3);
        int walkWidth = (int)ceil(unit.getType().width() / 8.0);
        int walkHeight = (int)ceil(unit.getType().height() / 8.0);
        int grdReach = int(max(unit.getGroundRange(), 64.0) + (speed * 24.0) + (unit.getType().width() / 2));
        int airReach = int(max(unit.getAirRange(), 64.0) + (speed * 24.0) + (unit.getType().width() / 2));
        //int frame = Broodwar->getFrameCount();


        // Choose the grid - NULL self grid for now
        auto grdGrid = unit.getPlayer() == Broodwar->self() ? nullptr : eGroundThreat;
        auto airGrid = unit.getPlayer() == Broodwar->self() ? nullptr : eAirThreat;

        WalkPosition start(unit.getWalkPosition());

        // Safety
        if (!grdGrid || !airGrid)
            return;

        // Iterate tiles and add to grid
        for (int x = start.x - radius; x < start.x + walkWidth + radius; x++) {
            for (int y = start.y - radius; y < start.y + walkHeight + radius; y++) {

                WalkPosition w(x, y);
                Position p = Position(w) + Position(4, 4);

                if (!w.isValid() || !p.isValid())
                    continue;

                grdGrid[x][y] += (unit.getVisibleGroundStrength() * (p.getDistance(unit.getPosition()) < grdReach));
                airGrid[x][y] += (unit.getVisibleAirStrength() * (p.getDistance(unit.getPosition()) < airReach));
                saveReset(w);
            }
        }
    }