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[rhaven <question670501@xxxxxxxxxxxxxxxxxxxxx>]

New question #670501 on Yade:
https://answers.launchpad.net/yade/+question/670501

Hi,
I am trying to use gravity (based on the gravity deposition example) to fill a volume with clumps and have them fall. I have several issues at the moment however. When I use makeClumpCloud to add clumps to the simulation only a few clumps are added. Sometimes only 1 clump other times 20 or so, even though the volume is quite large (error: Exceeded 200 attempts to place non-overlapping clump. Only 22 clumps were added, although you requested 1000)

Then once the clumps have been added to the simulation I try to run the gravity deposition but end up with error 
UserWarning: No labelled objects found. Use label='...' kwarg on individual plots.

This error also appears when running the gravity_deposition example from https://yade-dem.org/doc/tutorial-examples.html is there a matplotlib work around for this? 

many thanks in advance
Jesse

code is pasted below

######################################################################
# A script for creating a dense packing of clumps
#
# Each aggragate is a dense packing, but macroscopically the packing
# is loose
######################################################################
def getClumpInfo():
	c = []
	for b in O.bodies:
		#print(b.isClump)
		if b.isClump:
			c.append(b) 
			#print(b.shape)
			print('Clump ',b.id,' has following members:')
			keys = b.shape.members.keys()
			for ii in range(0,len(keys)):
				print('- Body ',keys[ii])
	#print(c)
	return c
	
def setClumpInfo(disp=False):
	c = []
	aggNum = -1
	for b in O.bodies:
		#print(b.isClump)
		
		if b.isClump:
			aggNum+=1
			c.append(b) 
			#print(b.shape)
			if disp: print('Clump ',b.id,' has following members:')
			keys = b.shape.members.keys()
			for ii in range(0,len(keys)):
				if disp: print('- Body ',keys[ii])
				#O.bodies[keys[ii]].agglomerate = b.id # tell each particle who is its agglomerate
				O.bodies[keys[ii]].agglomerate = aggNum # tell each particle who is its agglomerate
	print(str(len(c))+ ' ' + str(aggNum))
	return len(c)	#number of clumps	
	
def gravityDeposition():
	# gravity deposition in box, showing how to plot and save history of data,
	# and how to control the simulation while it is running by calling
	# python functions from within the simulation loop

	# import yade modules that we will use below
	from yade import pack, plot

	# create rectangular box from facets
	O.bodies.append(geom.facetBox(center,extend,wallMask=31))



	O.engines=[
	   ForceResetter(),
	   InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
	   InteractionLoop(
		  # handle sphere+sphere and facet+sphere collisions
		  [Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()],
		  [Ip2_FrictMat_FrictMat_FrictPhys()],
		  [Law2_ScGeom_FrictPhys_CundallStrack()]
	   ),
	   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
	
	O.run(500,True)
	
	raw_input('test')

	# 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()


from yade import pack,export,ymport
import random
random.seed(1) # to make colors always the same

numClumps = 2

minCorner = (0,0,0)
maxCorner = (7e-7,7e-7,7e-7)


#O.periodic=True
sp = pack.SpherePack()


# load clumps
ymport.textClumps('/tmp/clump0.txt')

c0 = pack.SpherePack()
c0.fromSimulation()

ymport.textClumps('/tmp/clump1.txt')
#c1 = getClumpInfo()
c1 = pack.SpherePack()
c1.fromSimulation()



	
O.switchScene(); O.resetThisScene() #####!!!!!!!	


print('Creating Clump Cloud')
test = sp.makeClumpCloud(minCorner, maxCorner, [c0,c1], periodic=True, num = 1000)#, periodic=True, num=-1, seed=1)
print(test)



sp.toSimulation()

dim=utils.aabbExtrema()
dim=utils.aabbExtrema()
xinf=dim[0][0]
xsup=dim[1][0]
xdim = xsup-xinf
X=xinf+(xdim)/2.
yinf=dim[0][1]
ysup=dim[1][1]
ydim = ysup-yinf
Y=yinf+(ydim)/2.
zinf=dim[0][2]
zsup=dim[1][2]
zdim = zsup-zinf
Z=zinf+(zdim)/2.

center = Vector3(X,Y,Z) #center of the packing
extend = Vector3(xdim,ydim,zdim) #extends of the packing

raw_input('Before gravity')
gravityDeposition()
raw_input('After gravity')
quit()

setClumpInfo()
#print(enumerate(sp))





# save the result, including information of agglomerates which the particle belongs to
export.textExt('/tmp/divided.txt','x_y_z_r_attrs',attrs=['b.agglomerate'])

print('Number of particles = ' , len(O.bodies))

try:
	from yade import qt
	qt.View()
except:
	pass
	



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