DAMASK_EICMD/processing/pre/geom_fromMinimalSurface.py

107 lines
5.1 KiB
Python
Executable File

#!/usr/bin/env python
# -*- coding: UTF-8 no BOM -*-
import os,sys,string,re,math,random
import numpy as np
from optparse import OptionParser
import damask
scriptID = string.replace('$Id$','\n','\\n')
scriptName = scriptID.split()[1][:-3]
# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
minimal_surfaces = ['primitive','gyroid','diamond',]
surface = {
'primitive': lambda x,y,z: math.cos(x)+math.cos(y)+math.cos(z),
'gyroid': lambda x,y,z: math.sin(x)*math.cos(y)+math.sin(y)*math.cos(z)+math.cos(x)*math.sin(z),
'diamond': lambda x,y,z: math.cos(x-y)*math.cos(z)+math.sin(x+y)*math.sin(z),
}
parser = OptionParser(option_class=damask.extendableOption, usage='%prog', description = """
Generate a geometry file of a bicontinuous structure of given type.
""", version = scriptID)
parser.add_option('-t','--type', dest='type', choices=minimal_surfaces, metavar='string', \
help='type of minimal surface (%s) [primitive]' %(','.join(minimal_surfaces)))
parser.add_option('-f','--threshold', dest='threshold', type='float', metavar='float', \
help='threshold value defining minimal surface [%default]')
parser.add_option('-g', '--grid', dest='grid', type='int', nargs=3, metavar='int int int', \
help='a,b,c grid of hexahedral box %default')
parser.add_option('-s', '--size', dest='size', type='float', nargs=3, metavar='float float float', \
help='x,y,z size of hexahedral box %default')
parser.add_option('-p', '--periods', dest='periods', type='int', metavar= 'int', \
help='number of repetitions of unit cell [%default]')
parser.add_option('--homogenization', dest='homogenization', type='int', metavar= 'int', \
help='homogenization index to be used [%default]')
parser.add_option('--m', dest='microstructure', type='int', nargs = 2, metavar= 'int int', \
help='two microstructure indices to be used %default')
parser.add_option('-2', '--twodimensional', dest='twoD', action='store_true', \
help='output geom file with two-dimensional data arrangement [%default]')
parser.set_defaults(type = minimal_surfaces[0])
parser.set_defaults(threshold = 0.0)
parser.set_defaults(periods = 1)
parser.set_defaults(grid = np.array([16,16,16]))
parser.set_defaults(size = np.array([1.0,1.0,1.0]))
parser.set_defaults(homogenization = 1)
parser.set_defaults(microstructure = [1,2])
parser.set_defaults(twoD = False)
(options,filename) = parser.parse_args()
# ------------------------------------------ setup file handle -------------------------------------
if filename == []:
file = {'output':sys.stdout, 'croak':sys.stderr}
else:
file = {'output':open(filename[0],'w'), 'croak':sys.stderr}
info = {
'grid': np.array(options.grid),
'size': np.array(options.size),
'origin': np.zeros(3,'d'),
'microstructures': max(options.microstructure),
'homogenization': options.homogenization
}
#--- report ---------------------------------------------------------------------------------------
file['croak'].write('\033[1m'+scriptName+'\033[0m\n')
file['croak'].write('grid a b c: %s\n'%(' x '.join(map(str,info['grid']))) + \
'size x y z: %s\n'%(' x '.join(map(str,info['size']))) + \
'origin x y z: %s\n'%(' : '.join(map(str,info['origin']))) + \
'homogenization: %i\n'%info['homogenization'] + \
'microstructures: %i\n\n'%info['microstructures'])
if np.any(info['grid'] < 1):
file['croak'].write('invalid grid a b c.\n')
sys.exit()
if np.any(info['size'] <= 0.0):
file['croak'].write('invalid size x y z.\n')
sys.exit()
#--- write header ---------------------------------------------------------------------------------
header = [scriptID + ' ' + ' '.join(sys.argv[1:])+'\n']
header.append("grid\ta %i\tb %i\tc %i\n"%(info['grid'][0],info['grid'][1],info['grid'][2],))
header.append("size\tx %f\ty %f\tz %f\n"%(info['size'][0],info['size'][1],info['size'][2],))
header.append("origin\tx %f\ty %f\tz %f\n"%(info['origin'][0],info['origin'][1],info['origin'][2],))
header.append("microstructures\t%i\n"%info['microstructures'])
header.append("homogenization\t%i\n"%info['homogenization'])
file['output'].write('%i\theader\n'%(len(header))+''.join(header))
#--- write data -----------------------------------------------------------------------------------
for z in xrange(options.grid[2]):
Z = options.periods*2.0*math.pi*(z+0.5)/options.grid[2]
for y in xrange(options.grid[1]):
Y = options.periods*2.0*math.pi*(y+0.5)/options.grid[1]
for x in xrange(options.grid[0]):
X = options.periods*2.0*math.pi*(x+0.5)/options.grid[0]
file['output'].write(\
str({True:options.microstructure[0],False:options.microstructure[1]}[options.threshold > \
surface[options.type](X,Y,Z)]) + {True:' ',False:'\n'}[options.twoD] )
file['output'].write({True:'\n',False:''}[options.twoD])