Unite function with Surface Body

[martin-woodplc]

Dear Developers,

I'm trying to generate an eccentric conical shape. the only way I found is using a combination of create_surface and create_body_from_loft_profile function to obtain the 3 surfaces body that will form my solid. When assembling these 3 surfaces in SpaceClaim using the Combine button, it works well, ending up with the desired solid body.

However when using the unite function from the API I got the following error:
"ValueError: Boolean operation of type 'unite' failed: union operation failed."

Is this normal behavior? Is there a different way to "stitch" multiple surface body into a solid body?

The code:

#1st Surface - Start
plane = Plane(Point3D([0,0,0]), direction_x=Vector3D([1,0,0]), direction_y=Vector3D([0,1,0]))
sketch = Sketch(plane)
sketch.circle(Point2D([0, 0]), 0.1 * UNITS.m)
surface1 = design.create_surface("surface1",sketch)

#2nd Surface - End
plane = Plane(Point3D([0,0,0.3]), direction_x=Vector3D([1,0,0]), direction_y=Vector3D([0,1,0]))
sketch = Sketch(plane)
sketch.circle(Point2D([0.05, 0]), 0.15 * UNITS.m)
surface2 = design.create_surface("surface2",sketch)

#3rd Surface - Loft
circleStart = Circle(Point3D([0,0,0]), 0.1 ,reference=Vector3D([1,0,0]),axis=Vector3D([0,0,1])).trim(Interval(0, 2 * np.pi))
circleEnd = Circle(Point3D([0.05,0,0.3]), 0.15 ,reference=Vector3D([1,0,0]),axis=Vector3D([0,0,1])).trim(Interval(0, 2 * np.pi))
surface3 = design.create_body_from_loft_profile("surface3", [[circleStart],[circleEnd]])

#Unite all surfaces
surface3.unite([surface2,surface1]) #Error here

Thanks in advance.

Martin

[RobPasMue]

Hi @martin-woodplc - thanks for opening this discussion!

Let's figure out some extra details from your request:

1. Which Ansys SpaceClaim version are you using?
2. Which ansys-geometry-core version are you using?
3. What is your Python version and what is your dev environment (i.e. run pip list and post the output - packages installed and specific verrsions)?

Pinging @jonahrb @b-matteo for visibility

[martin-woodplc]

Hi @RobPasMue,

Thanks for the quick reply. Here are the info:

• I'm using version Ansys SpaceClaim 24r2 (I tested also on Discovery 24r2 with same error)
• With ansys-geometry-core 0.8.1
• Python 3.11.4 with the following package:

Package                               Version
------------------------------------- -----------
aiohappyeyeballs                      2.4.4
aiohttp                               3.11.11
aiosignal                             1.3.2
ansys-api-dbu                         0.3.8
ansys-api-geometry                    0.4.27
ansys-api-mechanical                  0.1.2
ansys-api-platform-instancemanagement 1.1.0
ansys-geometry-core                   0.8.1
ansys-mechanical-core                 0.11.8
ansys-mechanical-env                  0.1.8
ansys-platform-instancemanagement     1.1.2
ansys-pythonnet                       3.1.0rc3
ansys-tools-path                      0.7.1
ansys-tools-visualization-interface   0.8.1
appdirs                               1.4.4
attrs                                 24.2.0
beartype                              0.19.0
certifi                               2024.12.14
cffi                                  1.17.1
charset-normalizer                    3.4.1
click                                 8.1.8
clr-loader                            0.2.6
colorama                              0.4.6
contourpy                             1.3.1
cycler                                0.12.1
flexcache                             0.3
flexparser                            0.4
fonttools                             4.55.4
frozenlist                            1.5.0
grpcio                                1.67.1
grpcio-health-checking                1.67.1
idna                                  3.10
importlib_metadata                    8.5.0
kiwisolver                            1.4.8
matplotlib                            3.10.0
more-itertools                        10.6.0
msgpack                               1.1.0
multidict                             6.1.0
numpy                                 2.2.2
packaging                             24.2
pillow                                11.1.0
Pint                                  0.24.4
pip                                   24.2
platformdirs                          4.3.6
pooch                                 1.8.2
propcache                             0.2.1
protobuf                              5.29.3
psutil                                6.0.0
pycparser                             2.22
pyparsing                             3.2.1
python-dateutil                       2.9.0.post0
pyvista                               0.44.2
requests                              2.32.3
scipy                                 1.15.1
scooby                                0.10.0
semver                                3.0.2
setuptools                            65.5.0
six                                   1.17.0
tqdm                                  4.66.5
trame                                 3.7.6
trame-client                          3.5.2
trame-server                          3.3.0
trame-vtk                             2.8.14
trame-vuetify                         2.8.0
typing_extensions                     4.12.2
urllib3                               2.3.0
vtk                                   9.3.1
websockets                            14.2
wslink                                2.2.2
yarl                                  1.18.3
zipp                                  3.20.2