// Sniffing
    public boolean isFoodInDir(Direction dir)
    {
        int[][] grid = world.getGrid();
        switch (dir)
        {
            case SOUTH:
                for (int i = x_pos + 1; i < (x_pos + MAX_SNIFF_DIST); ++i)
                {
                    if (i > x_pos - 1)
                        return false;
                    if (grid[i][y_pos] == BLOCK_VALUE || grid[i][y_pos] == LIFE_VALUE)
                        return false;
                    if (grid[i][y_pos] == FOOD_VALUE)
                        return true;
                }
                break;
            case EAST:
                for (int i = y_pos + 1; i < (y_pos + MAX_SNIFF_DIST); ++i)
                {
                    if (i > sizeY - 1)
                        return false;
                    if (grid[x_pos][i] == BLOCK_VALUE || grid[x_pos][i] == LIFE_VALUE)
                        return false;
                    if (grid[x_pos][i] == FOOD_VALUE)
                        return true;
                }
                break;
            case NORTH:
                for (int i = x_pos - 1; i > (x_pos - MAX_SNIFF_DIST); --i)
                {
                    if (i < 0)
                        return false;
                    if (grid[i][y_pos] == BLOCK_VALUE || grid[i][y_pos] == LIFE_VALUE)
                        return false;
                    if (grid[i][y_pos] == FOOD_VALUE)
                        return true;
                }
                break;
            case WEST:
                for (int i = y_pos - 1; i > (y_pos - MAX_SNIFF_DIST); --i)
                {
                    if (i < 0)
                        return false;
                    if (grid[x_pos][i] == BLOCK_VALUE || grid[x_pos][i] == LIFE_VALUE)
                        return false;
                    if (grid[x_pos][i] == FOOD_VALUE)
                        return true;
                }
                break;
        }
        return false;
    }