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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 *
from math import sqrt
#An example python script to generate a regular aggregate of hexagonal grains
# with bonds broken along lines
# Define region extremities:
size = 150.0
xsize = size
ysize = size
minPoint = Vector3(0.0,0.0,0.0)
maxPoint = Vector3(xsize,ysize,0.0)
# Define the geometrical constraints for packing
top_line = Line2D (
startPoint = minPoint,
endPoint = Vector3(size,0.0,0.0)
)
bottom_line = Line2D (
startPoint = Vector3(0.0,40.,0.0),
endPoint = Vector3(40.,40.,0.0)
)
#or compact form:
left_line = Line2D(Vector3(40.,40.,0.0),Vector3(40.,0.0,0.0))
right_line = Line2D(minPoint, Vector3(0.0,ysize,0.0))
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 = 1.25
)
# Fill the volume with particles:
packer = HGrainGenerator2D (
radius = 0.5
)
# Generate the packing
packer.generatePacking(
volume = box,
ntable = mntable,
tag = 0
)
# bond the particles
#mntable.generateBonds(0,1.0e-5,3)
# tag particles along the boundary lines (e.g. top_line, left_line etc.)
# using the compact form:
mntable.tagParticlesAlongLineWithMask(bottom_line, 5.0, 4, -1, 0)
mntable.tagParticlesAlongLineWithMask(top_line, 5.0, 8, -1, 0)
mntable.tagParticlesAlongLineWithMask(left_line, 8.0, 16, -1, 0)
mntable.tagParticlesAlongLineWithMask(right_line, 8.0, 32,-1, 0)
# write a geometry file in VTK format
mntable.write(
fileName = "temp/geo_example8.vtu",
outputStyle = 2
)
# write a geometry file in ESyS-Particle geo format
mntable.write(
fileName = "temp/geo_example8.geo",
outputStyle = 1
)
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