How to create a composed Polydata in order to perform boolean_difference ?

[rkenko]

Discussed in #3429

^{Originally posted by rkenko October 7, 2022}
Hi,

I am really new to Pyvista and i need help to 1. create a Polydata from multiple shapes then 2. perform boolean difference between a solid A and the previously created polydata. Below you have the detail of what i want to do:

I want to generate the volume C resulting from a boolean difference between the volumes A and B (please refer to the picture below: step 0). Currently, i succeeded in the importation of the volume A (step 1 in the picture). Now, i need help in order to generate the volume B. I think i have process in two steps: generate a surface from 3 lines and 1 arc of center pointe defined in the script (step 2 in the picture, i need help for this please), then extrude with a length of 64 the surface generated (step 3 in the picture). At the end i want to perform the boolean difference between this newly created volume and the volume imported at the step 1 (step C in the picture).

Please could you help me to create the solid B and perform the boolean difference ? Here you have my code and the vtk volume needed to run it (it is above 25MB so i sent it using a ink). In the python script i have already defined the points needed to create the solid B, i don't know how to create the composed polydata with lines and arcs...

https://filesender.renater.fr/?s=download&token=309573d7-f433-400f-ab47-43dc4e23fb8f