How to retrieve the face with the largest area

Akane Ito

I want to retrieve the ID of the face with the largest area among those selected in 'named selection'

Pernelle Marone-Hitz

my_NS = ExtAPI.DataModel.GetObjectsByName('Casing')[0]
geodata = ExtAPI.DataModel.GeoData
area = 0
my_id = 0
for face_id in my_NS.Ids:
    if geodata.GeoEntityById(face_id).Area >area:
        area = geodata.GeoEntityById(face_id).Area
        my_id = face_id
print('Face Id is: ' + str(my_id) + ' and area is: ' + str(area))

Mike.Thompson

You can also use a python sort method on a list and sort on the Area property. Then look at the last in the list. This is less coding and probably faster than a for loop.

Pernelle Marone-Hitz

One way to go could be:

my_NS = ExtAPI.DataModel.GetObjectsByName('Casing')[0]
geodata = ExtAPI.DataModel.GeoData
face_tuples = [(geodata.GeoEntityById(face_id), geodata.GeoEntityById(face_id).Area) for face_id in my_NS.Ids]
sorted_faces = sorted(face_tuples, key=lambda face: face[1]) 
print('Face Id is: ' + str(sorted_faces[-1][0].Id) + ' and area is: ' + str(sorted_faces[-1][1]))

Akane Ito

@Mike.Thompson
Please teach me the specific method you just told me.
I don't want just the largest area, but I want to get up to the second largest one.

Akane Ito

Thank you, I was able to do it with the method you taught me