What does this MR do?
- Fix an error in the calculation of the stress eigenvectors. The strain tensor contained a wrong summation, which has been removed. Additionally, the stress tensor did not contain the full strain trace on its diagonal. Both issues have been fixed.
- Add the configuration option
continuousto the stress EV visualization. This allows toggling of a P1 (vertex) or a P0 (cell) representation of the EVs.
- Remove output of the index of the largest EV. This simply was leftover code from !8 (merged).