e = Frames.axis(axis);
A unit vector e is returned depending on whether x-, y-, or z-axis is required.
axis | e
-------+-----------
1 | {1,0,0}
2 | {1,0,0}
3 | {1,0,0}
function axis extends Modelica.Icons.Function; input Integer axis(min = 1, max = 3) "Axis vector to be returned"; output Real e[3](each final unit = "1") "Unit axis vector"; end axis;