Rotation in GAP Could I understand like this?

I didn’t know this option in Karamba3D, which version do you use? Is it a load case?

yes the new 2.2 version add more loads

Hi @lujiaxing2007,
sorry for my late reply, there were Easter holidays in Austria.
I am not sure whether I understand the question correctly.
You can prescribe arbitrary angles as kinks. They remain constant throughout the rest of the calculation. When displaying the deformed system the angle depends on the displacement scale. For a unit displacement scale the correct angle should appear.
– Clemens

get it dear Clemens. thanks alot and be safe pls~~