This is a derivative of function resolve2.
function resolve2_der import Modelica.Mechanics.MultiBody.Frames; extends Modelica.Icons.Function; input Orientation R "Orientation object to rotate frame 1 into frame 2"; input Real v1[3] "Vector resolved in frame 1"; input Real v1_der[3] "= der(v1)"; output Real v2_der[3] "Derivative of vector v resolved in frame 2"; end resolve2_der;