Thank you for your detailed explanation.
It helped me to understand.
Thanks to your help, I have a rough understanding of the cut plane matrix and compute method.
Also, I could understand how to compute ‘v1’ and ‘v2’.
What should I do as a next step in creating a program?
Is it difficult to incorporate it into the program of ImplicitPlaneWidget2 from the beginning?
I’m having trouble getting started with program improvement.