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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 *
#An example python script to generate a bonded rectangle of particles with a discrete fracture network included
width = 50.0
height = width
# Define region extremities:
minPoint = Vector3(0.0,0.0,0.0)
maxPoint = Vector3(width,height,0.0)
# Define the geometrical constraints for packing
# (e.g. lines bordering a rectangular region in 2D)
# QUESTION: Is there a particular order for defining endpoints of lines?
top_line = Line2D (
startPoint = Vector3(width,0.0,0.0),
endPoint = minPoint
)
bottom_line = Line2D (
startPoint = maxPoint,
endPoint = Vector3(0.0,height,0.0)
)
left_line = Line2D (
startPoint = Vector3(width,0.0,0.0),
endPoint = maxPoint
)
right_line = Line2D (
startPoint = minPoint,
endPoint = Vector3(0.0,height,0.0)
)
# Define the Volume to be filled with spheres:
# (e.g. a BoxWithLines2D)
box = BoxWithLines2D (
minPoint = minPoint,
maxPoint = maxPoint
)
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,
maxPoint = maxPoint,
gridSize = 2.5
)
# Fill the volume with particles:
packer = InsertGenerator2D (
minRadius = 0.1,
maxRadius = 1.0,
insertFails = 10000,
maxIterations = 10000,
tolerance = 1.0e-6
)
packer.generatePacking( volume = box, ntable = mntable, tag = 0)
# create bonds between neighbouring particles:
mntable.generateBonds(
tolerance = 1.0e-5,
bondID = 0
)
#Add a discrete fracture network
brkLine = LineSegment2D (
startPoint = Vector3(0.4*width,0.4*height,0.0),
endPoint = Vector3(0.6*width,0.6*height,0.0)
)
mntable.breakBondsAlongLineSegment(
lineSegment = brkLine,
distance = 0.25,
tag = 0
)
# write a geometry file
mntable.write(
fileName = "temp/geo_crack.geo",
outputStyle = 1
)
# write a vtk file
mntable.write(
fileName = "temp/geo_crack.vtu",
outputStyle = 2
)
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