Hydraulic shape factor

[gxw-ll]

Hi，Prof，When I am calculating the hydraulic shape factor, I noticed that the coordinates of the throat are missing. How should I choose the coordinates for the throat?intersecting_cones, hybrid_cones_and_cylinders, intersecting_trapezoids, hybrid_trapezoids_and_rectangles, intersecting_pyramids, hybrid_pyramids_and_cuboids—all of these functions require throat.coords. Below is the error part you provided:
`pn.add_model(propname='throat.hydraulic_size_factor', model=op.models.geometry.hydraulic_size_factors.intersecting_cones)
Traceback (most recent call last):

File D:\anaconda\lib\site-packages\openpnm\core_base2.py:173 in getitem
return super().getitem(key)

KeyError: 'throat.coords'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

Input In [30] in <cell line: 1>
pn.add_model(propname='throat.hydraulic_size_factor', model=op.models.geometry.hydraulic_size_factors.intersecting_cones)

File D:\anaconda\lib\site-packages\openpnm\core_models.py:405 in add_model
self.run_model(propname+'@'+domain)

File D:\anaconda\lib\site-packages\openpnm\core_models.py:507 in run_model
self.run_model(propname=propname, domain=domain)

File D:\anaconda\lib\site-packages\openpnm\core_models.py:526 in run_model
vals = mod_dict['model'](self, **kwargs)

File D:\anaconda\lib\site-packages\openpnm\models\geometry\hydraulic_size_factors_funcs.py:199 in intersecting_cones
L1, Lt, L2 = _conduit_lengths.intersecting_cones(

File D:\anaconda\lib\site-packages\openpnm\models\geometry\conduit_lengths_funcs.py:154 in intersecting_cones
t_coords = network[throat_coords]

File D:\anaconda\lib\site-packages\openpnm\core_base2.py:188 in getitem
raise KeyError(key)

KeyError: 'throat.coords'`