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[nobody <question685055@xxxxxxxxxxxxxxxxxxxxx>]

New question #685055 on Yade:
https://answers.launchpad.net/yade/+question/685055

Hi All,

I want to use this command :   yade.export.text(filename, mask=-1) to export the particle position and radius.  the explanation for this command is:  mask (int) – export only spheres with the corresponding mask.



here is the MWE:


import numpy as np
from yade import pack, plot, export, utils
import math
O.bodies.append(geom.facetBox((.5,.5,.5),(.5,.5,.5),wallMask=31))
sp=pack.SpherePack()
sp.makeCloud((0,0,0),(1,1,1),rMean=.07,rRelFuzz=.5)
sp.toSimulation()
O.engines=[
	ForceResetter(),
	InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
	InteractionLoop(
		[Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()],
		[Ip2_FrictMat_FrictMat_FrictPhys()],
		[Law2_ScGeom_FrictPhys_CundallStrack()]
	),
	PyRunner(command='checkUnbalanced()',realPeriod=2),
	PyRunner(command='subbox()',iterPeriod=1000),
	#PyRunner(command='displacement()',iterPeriod=30000),
	#VTKRecorder(fileName='3d-vtk-',recorders=['all','bstresses'],iterPeriod=1000),
	PyRunner(command='get_po()',iterPeriod=1000),
	NewtonIntegrator(gravity=(0,0,-9.81),damping=0.4),
	
]
O.dt=.5*PWaveTimeStep()
print(len(O.bodies))
def checkUnbalanced():
	if unbalancedForce()<.001:
		O.pause()
#plot.plots={'i':('unbalanced')}
#plot.plot()
x0 = 0.5
y0 = 0.5
z0 = 0.5
######################## sub-region and coloring#########################################
ball_list1 =[]
def subbox():
	global ball_list1
	aaa = 0.0
	for b in O.bodies:
		brp = math.sqrt((b.state.pos[0]-x0)**2 + (b.state.pos[1]-y0)**2)
		if brp >= 0.2:
			if brp <= 0.4:
				if (b.state.pos[2]-z0 >= -0.5) and (b.state.pos[2]-z0 <= 0.0):
					if isinstance(b.shape,Sphere):
						b.shape.color =Vector3(255,255,255) # white
						m = b.id
						ball_list1.append(m)
for i in ball_list1:		
	for b in O.bodies[i]:
		b.mask = 1
def get_po():
	export.text(filename = "state1.txt",mask = 1)


but it seems this command just export all particle' information. not just ball_list1.

Is there anyone can give me some suggestions.

best,
yong





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