CHARMM Development Project
Dear all.
I want to fix angle of the two atoms and one plane by using mmfp or others but I don't know how to do.

For example,
plane : z = 2
type : atomA
type : atomB
atomA and atomB are in the same resname(molecule).

I want to fix the ANGLE(plane - atomA - atomB) = 180.

Thank you very much.
It is not clear exactly what you are trying to do (or why).
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