Example proposal: How can I plot in pydpf-post results on a mesh part linked to a named selection?

[jviqueg]

📝 Description of the example

'Extract results on named selections - Modal Simulation' example shows how to plot results on a specific named selection. Results are only shown on that named selection, but the rest of the structure is kept grey. Is there any way to only plot the mesh which is linked to the named selection and not the whole structure?
Having a look at pydpf-post manual, we can see that simulation.plot has only mesh=true or mesh=false, but it does not allow to link to a specific part of the mesh. What it can be done is to use plot contour and its pyvista options, for instance opacity.
Here the code to plot on BAR_1 named selection from the example commented before:

from ansys.dpf import post
from ansys.dpf.post import examples

example_path = examples.download_modal_frame()
solution = post.load_solution(example_path)

disp = solution.displacement()
disp_on_named_selection = solution.displacement(named_selection='BAR_1')
dx = disp_on_named_selection.x

all_elem = solution.mesh.elements.scoping.ids
elem_ns = solution.mesh.named_selection('BAR_1').ids

pl = dx.plot_contour("time", [1], nan_opacity = 0.0) 

📁 Files needed for running the example

None

💻 Which operating system are you using?

Windows

📀 Which ANSYS version are you using?

Ansys 2023R2

🐍 Which Python version are you using?

3.8

📦 Installed packages

aiohttp==3.8.3
aiosignal==1.2.0
ansys-api-mapdl==0.5.1
ansys-api-mechanical==0.1.0
ansys-api-meshing-prime==0.1.1
ansys-api-platform-instancemanagement==1.0.0b3
ansys-corba==0.1.1
ansys-dpf-composites==0.3.1
ansys-dpf-core==0.9.0
ansys-dpf-gate==0.4.1
ansys-dpf-gatebin==0.3.1
ansys-dpf-post==0.4.0
ansys-grpc-dpf==0.7.1
ansys-mapdl-core==0.65.2
ansys-mapdl-reader==0.52.20
ansys-mechanical-core==0.9.2
ansys-meshing-prime==0.3.2
ansys-platform-instancemanagement==1.1.1
ansys-pythonnet==3.1.0rc1
ansys-tools-path==0.3.1
anyio==3.6.1
appdirs==1.4.4
argon2-cffi==21.3.0
argon2-cffi-bindings==21.2.0
asttokens==2.0.8
async-timeout==4.0.2
attrs==22.1.0
backcall==0.2.0
beautifulsoup4==4.11.1
bleach==5.0.1
cachetools==5.3.1
certifi==2023.5.7
cffi==1.15.1
charset-normalizer==2.1.1
click==8.1.7
clr-loader==0.2.5
colorama==0.4.6
contourpy==1.0.5
cycler==0.11.0
debugpy==1.6.3
decorator==5.1.1
defusedxml==0.7.1
entrypoints==0.4
executing==1.1.1
fastjsonschema==2.16.2
fatpack==0.7.3
fonttools==4.37.4
frozenlist==1.3.1
geomdl==5.3.1
google-api-core==2.11.1
google-api-python-client==2.93.0
google-auth==2.22.0
google-auth-httplib2==0.1.0
googleapis-common-protos==1.59.1
grpcio==1.56.0
httplib2==0.22.0
idna==3.4
imageio==2.22.2
importlib-metadata==6.8.0
importlib-resources==5.10.0
ipykernel==6.16.0
ipython==8.5.0
ipython-genutils==0.2.0
ipywidgets==8.0.2
jedi==0.18.1
Jinja2==3.1.2
jsonschema==4.16.0
jupyter==1.0.0
jupyter-console==6.4.4
jupyter-core==4.11.1
jupyter-server==1.21.0
jupyter_client==7.4.2
jupyterlab-pygments==0.2.2
jupyterlab-widgets==3.0.3
kiwisolver==1.4.4
MarkupSafe==2.1.1
matplotlib==3.6.1
matplotlib-inline==0.1.6
mistune==2.0.4
multidict==6.0.2
nbclassic==0.4.5
nbclient==0.7.0
nbconvert==7.2.1
nbformat==5.7.0
nest-asyncio==1.5.6
notebook==6.5.1
notebook_shim==0.2.0
numpy==1.24.4
packaging==23.1
pandas==1.5.1
pandocfilters==1.5.0
parso==0.8.3
pickleshare==0.7.5
Pillow==9.2.0
pkgutil_resolve_name==1.3.10
platformdirs==3.9.1
pooch==1.7.0
prometheus-client==0.15.0
prompt-toolkit==3.0.31
protobuf==3.20.3
protoc-gen-swagger==0.1.0
psutil==5.9.5
pure-eval==0.2.2
pyansys-tools-versioning==0.4.0
pyasn1==0.5.0
pyasn1-modules==0.3.0
pycparser==2.21
Pygments==2.13.0
pyiges==0.3.1
pyparsing==3.1.0
pyrsistent==0.18.1
python-dateutil==2.8.2
pytz==2022.6
pyvista==0.42.2
pywin32==304
pywinpty==2.0.8
pyzmq==24.0.1
qtconsole==5.3.2
QtPy==2.2.1
requests==2.31.0
rsa==4.9
scipy==1.10.0
scooby==0.6.0
Send2Trash==1.8.0
six==1.16.0
sniffio==1.3.0
soupsieve==2.3.2.post1
stack-data==0.5.1
terminado==0.16.0
tinycss2==1.2.1
tornado==6.2
tqdm==4.65.0
traitlets==5.4.0
uritemplate==4.1.1
urllib3==1.26.16
vtk==9.2.2
wcwidth==0.2.5
webencodings==0.5.1
websocket-client==1.4.1
widgetsnbextension==4.0.3
wslink==1.9.0
yarl==1.8.1
zipp==3.16.1