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New question #677977 on Yade:
https://answers.launchpad.net/yade/+question/677977

hello
i have creat a fecetBox with many polyhedra in it and expect them collide with each other, but when i click the "start" button, the polyhedra just go through the facetBox. my code is as below:

from yade import polyhedra_utils,pack,plot
import random

polyMat = PolyhedraMat(density=3000,young=1e10,poisson=.5,frictionAngle=atan(0.8))
O.materials.append(polyMat)

O.bodies.append(geom.facetBox((5,5,5),(5,5,5),wallMask=31))
polyhedra_utils.fillBox((0,0,0),(10,10,10),polyMat,seed=1)

O.engines=[
   ForceResetter(),
   InsertionSortCollider([Bo1_Polyhedra_Aabb(),Bo1_Facet_Aabb()]),
   InteractionLoop(
      [Ig2_Polyhedra_Polyhedra_PolyhedraGeom(),Ig2_Facet_Polyhedra_PolyhedraGeom()],
      [Ip2_PolyhedraMat_PolyhedraMat_PolyhedraPhys()],
      [Law2_PolyhedraGeom_PolyhedraPhys_Volumetric()]
   ),
   NewtonIntegrator(gravity=(0,0,-9.81),damping=0.4),
   # call the checkUnbalanced function (defined below) every 2 seconds
   PyRunner(command='checkUnbalanced()',realPeriod=2),
   # call the addPlotData function every 200 steps
   PyRunner(command='addPlotData()',iterPeriod=100)
]
O.dt=.5*PWaveTimeStep()

# enable energy tracking; any simulation parts supporting it
# can create and update arbitrary energy types, which can be
# accessed as O.energy['energyName'] subsequently
O.trackEnergy=True

# if the unbalanced forces goes below .05, the packing
# is considered stabilized, therefore we stop collected
# data history and stop
def checkUnbalanced():
   if unbalancedForce()<.05:
      O.pause()
      plot.saveDataTxt('bbb.txt.bz2')
      # plot.saveGnuplot('bbb') is also possible

# collect history of data which will be plotted
def addPlotData():
   # each item is given a names, by which it can be the unsed in plot.plots
   # the **O.energy converts dictionary-like O.energy to plot.addData arguments
   plot.addData(i=O.iter,unbalanced=unbalancedForce(),**O.energy)

# define how to plot data: 'i' (step number) on the x-axis, unbalanced force
# on the left y-axis, all energies on the right y-axis
# (O.energy.keys is function which will be called to get all defined energies)
# None separates left and right y-axis
plot.plots={'i':('unbalanced',None,O.energy.keys)}

# show the plot on the screen, and update while the simulation runs
plot.plot()

O.saveTmp()
##end

i have no idea why this situation happend because when i tried with sphere, everything is just fine. i would appreciate it if you can help me!


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