Question #234062 on Yade changed: https://answers.launchpad.net/yade/+question/234062
Bruno Chareyre posted a new comment: >you can track it directly from python with O.bodies[id].state.rot() In fact state.rot() is first computing a quaternion, then converting to axisAngle. As pointed out by kelaogui, it will not work for very large rotations (more than 2*pi). >It gives the same result than recording the cumulative rotation in python for each time step with rot = rot_prev + angVel*dt . I don't think so. state.rot() is always exact, while "rot = rot_prev+angVel*dt" is only correct when the rotation axis is constant (else it becomes completely wrong for large rotations, even if each increment is small). That is why I was asking the equations. -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
