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[gaoxuesong <question677084@xxxxxxxxxxxxxxxxxxxxx>]

New question #677084 on Yade:
https://answers.launchpad.net/yade/+question/677084

I want to get the information of some specific spheres during the calculation when it meets some condition, like the time larger than some point. i have used two run mode of yade, one is just normal mode, the other is batch mode. 

The flowchart of my code is that, 

### to invode getDemandbody to get what i want 
def getDandBody():

    # input a box 
        vboxMin = (2.1,0.1,0.72)
        vboxMax = (2.9,0.9,0.98)
        vPorosity = utils.voxelPorosity(resolution=400, start=vboxMin, end=vboxMax)

    # use the box the select the spheres and erase outside spheres 
        for eb in O.bodies:
            if not isinstance(eb.shape, Sphere):
                continue 
            if not (vboxMin[0]<= eb.state.pos[0]<= vboxMax[0] and vboxMin[1]<= eb.state.pos[1] <= vboxMax[1] and vboxMin[2] <= 
            eb.state.pos[2] <= vboxMax[2]):
                O.bodies.erase(eb.id)

    # output the information 
       with open('rel.txt', 'w') as fd:
            fd.write('%e %e\n' % (sthrd, lthrd))
            fd.write('%.4f, %d, %d, %.2f\n' % (1-vPorosity, snum, inum, inum*1.0/snum))       
           O.pause()

#define the new thread to load saved file 
def newThread():
    if O.time > 3.6:   
        import thread 
        thread.start_new_thread(newRun,())
        
def newRun(): 
    O.pause();O.wait()

    ### import saved state 
    O.load('./svdir/t3-3.5')

    ### new engines and new run
   ### the function of getDemandBody is what i need to run to get sphere information 
    O.engines = [
            PyRunner(iterPeriod=1,command='getDemandBody()'),
            ]
    O.run(1)

### the save file function 
def svfun():
    some expressions 
         

#define engines:
O.engines=[
	ForceResetter(),
	InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
	InteractionLoop(
      	# handle sphere+sphere and facet+sphere collisions
     	   [Ig2_Sphere_Sphere_ScGeom6D(),Ig2_Facet_Sphere_ScGeom6D()],
     	   [Ip2_CohFrictMat_CohFrictMat_CohFrictPhys()],
      	   [Law2_ScGeom6D_CohFrictPhys_CohesionMoment()]
   	),
       PyRunner(iterPeriod=100,command='svfun()'),
       PyRunner(iterPeriod=100,command='newThread()'),
       NewtonIntegrator(damping=0.75, exactAsphericalRot=True, gravity=(0,0,-9810*gcof)),

]

O.run() 

### script finished #####

I have two problems,
1. when i use the normal mode, like the command, yade  myscript.py, it works. I can get the information of the selected spheres. But i want to ask, using a new thread is a must? In fact, i don't want to load saved file, just the current state is also ok.
2. when i use the yade-batch mode, it doesn't work. There is no output file. So i doubt there is a problem when create a new thread in batch mode.  

So any suggestions? 

Thanks, 
Xuesong 


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