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#############################################################
## ##
## Copyright (c) 2007-2017 by The University of Queensland ##
## Centre for Geoscience Computing ##
## http://earth.uq.edu.au/centre-geoscience-computing ##
## ##
## Primary Business: Brisbane, Queensland, Australia ##
## Licensed under the Open Software License version 3.0 ##
## http://www.apache.org/licenses/LICENSE-2.0 ##
## ##
#############################################################
from gengeo import Vector3, Line2D, BoxWithLines2D, MNTable2D, InsertGenerator2D
#An example python script to generate a 2D bonded rectangle of particles
# Define region extremities:
minPoint = Vector3(0.0,0.0,0.0)
maxPoint = Vector3(10.0,10.0,0.0)
# Define the volume to be filled with spheres:
box = BoxWithLines2D (
minPoint = minPoint,
maxPoint = maxPoint
)
# Define the geometrical constraints for packing
top_line = Line2D (
startPoint = Vector3(10.0,0.0,0.0),
endPoint = minPoint
)
bottom_line = Line2D (
startPoint = maxPoint,
endPoint = Vector3(0.0,10.0,0.0)
)
left_line = Line2D (
startPoint = Vector3(10.0,0.0,0.0),
endPoint = maxPoint
)
right_line = Line2D (
startPoint = minPoint,
endPoint = Vector3(0.0,10.0,0.0)
)
box.addLine(top_line)
box.addLine(bottom_line)
box.addLine(left_line)
box.addLine(right_line)
# Create a multi-group neighbour table to contain the particles:
mntable = MNTable2D (
minPoint = minPoint, # specific regional extremities
maxPoint = maxPoint,
gridSize = 2.5 # neighbour search algorithm grid size
)
# Fill the volume with particles:
packer = InsertGenerator2D (
minRadius = 0.1, # minimum radius of spheres to insert
maxRadius = 0.4, # maximum radius of spheres to insert
insertFails = 5000, # maximum number of insertion failures
maxIterations = 1000, # max. iterations for Newton-Raphson solver
tolerance = 1.0e-5 # max. allowable overlap of spheres
)
packer.generatePacking( volume = box, ntable = mntable, tag = 0)
# create bonds between neighbouring particles:
mntable.generateBonds(
tolerance = 1.0e-5, # max. gap between "touching" particles
bondID = 0 # bond ID of created bonds
)
# write the geometry to a file in raw format
mntable.write(
fileName = "temp/geo_example1.txt",
outputStyle = 0
)
# write the geometry to an ESyS-Particle geometry file
mntable.write(
fileName = "temp/geo_example1.geo",
outputStyle = 1
)
# write the geometry as a VTK file
mntable.write(
fileName = "temp/geo_example1.vtu",
outputStyle = 2
)
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