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[Lei Hang <question691702@xxxxxxxxxxxxxxxxxxxxx>]

New question #691702 on Yade:
https://answers.launchpad.net/yade/+question/691702

Dear all,

The script of periodic simple shear is as following:
https://gitlab.com/yade-dev/trunk/blob/master/doc/sphinx/tutorial/04-periodic-simple-shear.py

My questions:
1.Does the “if 0” in line 82 mean the following script (for b in O.bodies: b.state.blockedDOFs='XYZ' b.state.angVel=(0,0,0)) will never be executed? If we change it to "if 1", the following script will be always executed?

2.In line 85(b.state.blockedDOFs='XYZ'),it blocks  X,Y,Z rotations of spheres. Why in line 87 (b.state.angVel=(0,0,0)) still set the angle velocity to be 0? Isn't it blocking  X,Y,Z rotations of spheres equivalent to  the angle velocity being 0?

3.What's the meaning of "if stress[2,2]!=0 else 0" in line 112?

4.The former content of the script ( b.state.blockedDOFs='XYZ', b.state.angVel=(0,0,0)) blocks the rotation of the particles. Does the rotation of the particles equal to 0? Why it still set "Gl1_Sphere.stripes=True" to show rotation of particles? 

Many thanks in advance!

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