THANK YOU ALL for the help! It helped me a lot, I've found my mistake. Your advices helped me to create such objects: http://geom.com.ua/s1.png http://geom.com.ua/s2.png
After that I'm getting "quaternion expert" :) Actually I used another library http://www.sacredsoftware.net/tutorials/Tutorials.xhtml for creating quaternion. Also I would recommend this tutorials for understanding this complicated topic. Maybe it is a good idea to add this link to wiki? Thanks again Best Regards / Mit freundlichen Grüßen / С наилучшими пожеланиями Anton Gladkyy 2009/5/7 Sergei D. <[email protected]> > > > If want to play with Quaternions in python, I recommend very simple > > euclid module: http://partiallydisassembled.net/euclid.html > > > > Vaclav > > > Anton, I have attached modified scene.xml, which I have get from your > scene.xml > with Vaclav's euclid.py (Vaclav, thanks!) and typing the follow commands > in YADE console: > > from euclid import * > O.load('scene.xml') > > q1 = Quaternion.new_rotate_axis(pi/6, Vector3(0,1,0)) # rotate about Y > on pi/6 angles > q2 = Quaternion.new_rotate_axis(pi/2, Vector3(0,0,1)) # rotate about Z > on pi/2 angles > > # now, YADE's se3 is [X,Y,Z, Ax,Ay,Az, a] > # where X,Y,Z is the body's position; > # Ax,Ay,Az is the rotation axis, > # a is the rotation angle. > # So, we... > o1 = q1.get_angle_axis() # get angle and axis for the first blue box > (rotation about Y) > o2 = (q2*q1).get_angle_axis() # get angle and axis for the second blue > box (first rotation about Y, after this rotation aboud Z) > # Then, we set the parameters, > O.bodies[1].phys['se3'] = [0,0,0, o1[1][0], o1[1][1], o1[1][2], o1[0]] > O.bodies[3].phys['se3'] = [0,0,0, o2[1][0], o2[1][1], o2[1][2], o2[0]] > > > > > _______________________________________________ > Mailing list: > https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users> > Post to : [email protected] > Unsubscribe : > https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users> > More help : https://help.launchpad.net/ListHelp > >
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