Carlos Bueno

I wrote an implementation of the vector angle function that may be useful. #4362

I added another function to compute the angle between two vectors comparable to pointvectorangle called arrayvectorangle that only depends on 6 parameters as you suggested. However, I think it can...

@peastman This PR is ready for review.

@peastman, thank you for your response. I agree with your suggestion to simplify the functions and make the names clearer. I'll eliminate the pointvectorangle function and rename arrayvectorangle to simply...

Sorry for the delay in answering this thread. I encountered some challenges implementing the `vectorangle(x2-x1, y2-y1, z2-z1, x4-x3, y4-y3, z4-z3)` (currently `arrayvectorangle`) under periodic boundary conditions. Currently this commit has...

@peastman, I renamed the functions to: ``` angle4(g1,g2,g3,g4) vectorangle(x2-x1, y2-y1, z2-z1, x4-x3, y4-y3, z4-z3) pointvectorangle(x1, y1, z1, x2, y2, z2, x3, y3, z3, x4, y4, z4) ``` I don't know...

Thank you for writing the steps so clearly, I could easily reproduce the segmentation fault. I still find it strange that the error only happens at the end of the...