Hello, I have just noticed that the dihedral angle obtained by Ctrl-Click (in Edit mode) on Ca-C bond in protein backbone is not actually the psi dihedral (N-Ca-C-N) but rather the angle between N-Ca-C-O (shown in white on the attached picture)! "dihedral" command shows the right value for psi (shown in yellow on the picture).
This is not a bug though it is confusing because phi angle is calculated correctly in both cases. Furthermore the necessity of rerunning "dihedral" each time psi adjustment is needed and lack of "live-preview" is not very comfortable. It might be worth tweaking this issue. SDA
<<attachment: psi2.jpg>>
