120 lines
5.7 KiB
Python
Executable File
120 lines
5.7 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: UTF-8 no BOM -*-
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import os,sys,string,math,numpy
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from optparse import OptionParser, OptionGroup, Option, SUPPRESS_HELP
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#--------------------------------------------------------------------------------------------------
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class extendedOption(Option):
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#--------------------------------------------------------------------------------------------------
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# used for definition of new option parser action 'extend', which enables to take multiple option arguments
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# taken from online tutorial http://docs.python.org/library/optparse.html
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ACTIONS = Option.ACTIONS + ("extend",)
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STORE_ACTIONS = Option.STORE_ACTIONS + ("extend",)
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TYPED_ACTIONS = Option.TYPED_ACTIONS + ("extend",)
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ALWAYS_TYPED_ACTIONS = Option.ALWAYS_TYPED_ACTIONS + ("extend",)
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def take_action(self, action, dest, opt, value, values, parser):
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if action == "extend":
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lvalue = value.split(",")
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values.ensure_value(dest, []).extend(lvalue)
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else:
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Option.take_action(self, action, dest, opt, value, values, parser)
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#--------------------------------------------------------------------------------------------------
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# MAIN
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#--------------------------------------------------------------------------------------------------
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minimal_surfaces = ['primitive','gyroid','diamond',]
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surface = {
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'primitive': lambda x,y,z: math.cos(x)+math.cos(y)+math.cos(z),
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'gyroid': lambda x,y,z: math.sin(x)*math.cos(y)+math.sin(y)*math.cos(z)+math.cos(x)*math.sin(z),
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'diamond': lambda x,y,z: math.cos(x-y)*math.cos(z)+math.sin(x+y)*math.sin(z),
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}
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parser = OptionParser(option_class=extendedOption, usage='%prog', description = """
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Generate a geometry file of a bicontinuous structure of given type.
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""" + string.replace('$Id$','\n','\\n')
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)
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parser.add_option('-t','--type', dest='type', type='string', \
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help='type of minimal surface (%s)'%(','.join(minimal_surfaces)))
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parser.add_option('-f','--threshold', dest='threshold', type='float', \
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help='threshold value defining minimal surface [%default]')
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parser.add_option('-g', '--grid', dest='grid', type='int', nargs=3, \
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help='a,b,c grid of hexahedral box %default')
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parser.add_option('-s', '--size', dest='size', type='float', nargs=3, \
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help='x,y,z size of hexahedral box %default')
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parser.add_option('-p', '--periods', dest='periods', type='int', \
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help='number of repetitions of unit cell [%default]')
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parser.add_option('--homogenization', dest='homogenization', type='int', \
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help='homogenization index to be used [%defaults]')
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parser.add_option('--m', dest='microstructure', type='int', nargs = 2, \
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help='two microstructure indices to be used %default')
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parser.add_option('-2', '--twodimensional', dest='twoD', action='store_true', \
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help='output geom file with two-dimensional data arrangement [%default]')
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parser.set_defaults(type = minimal_surfaces[0])
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parser.set_defaults(threshold = 0.0)
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parser.set_defaults(periods = 1)
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parser.set_defaults(grid = numpy.array([16,16,16]))
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parser.set_defaults(size = numpy.array([1.0,1.0,1.0]))
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parser.set_defaults(homogenization = 1)
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parser.set_defaults(microstructure = [1,2])
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parser.set_defaults(twoD = False)
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(options, args) = parser.parse_args()
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#--- setup file handles ---------------------------------------------------------------------------
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file = {'name':'STDIN',
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'input':sys.stdin,
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'output':sys.stdout,
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'croak':sys.stderr,
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}
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if numpy.any(options.grid < 1):
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file['croak'].write('invalid grid...\n')
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sys.exit()
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if numpy.any(options.size < 0.0):
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file['croak'].write('invalid size...\n')
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sys.exit()
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info = {
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'grid': numpy.array(options.grid),
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'size': numpy.array(options.size),
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'origin': numpy.zeros(3,'d'),
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'microstructures': max(options.microstructure),
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'homogenization': options.homogenization
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}
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#--- report ---------------------------------------------------------------------------------------
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file['croak'].write('grid a b c: %s\n'%(' x '.join(map(str,info['grid']))) + \
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'size x y z: %s\n'%(' x '.join(map(str,info['size']))) + \
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'origin x y z: %s\n'%(' : '.join(map(str,info['origin']))) + \
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'homogenization: %i\n'%info['homogenization'] + \
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'microstructures: %i\n\n'%info['microstructures'])
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#--- write header ---------------------------------------------------------------------------------
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header = ['$Id$\n']
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header.append("grid\ta %i\tb %i\tc %i\n"%(info['grid'][0],info['grid'][1],info['grid'][2],))
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header.append("size\tx %f\ty %f\tz %f\n"%(info['size'][0],info['size'][1],info['size'][2],))
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header.append("origin\tx %f\ty %f\tz %f\n"%(info['origin'][0],info['origin'][1],info['origin'][2],))
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header.append("microstructures\t%i\n"%info['microstructures'])
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header.append("homogenization\t%i\n"%info['homogenization'])
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file['output'].write('%i\theader\n'%(len(header))+''.join(header))
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#--- write data -----------------------------------------------------------------------------------
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for z in xrange(options.grid[2]):
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Z = options.periods*2.0*math.pi*(z+0.5)/options.grid[2]
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for y in xrange(options.grid[1]):
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Y = options.periods*2.0*math.pi*(y+0.5)/options.grid[1]
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for x in xrange(options.grid[0]):
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X = options.periods*2.0*math.pi*(x+0.5)/options.grid[0]
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file['output'].write(\
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str({True:options.microstructure[0],False:options.microstructure[1]}[options.threshold > \
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surface[options.type](X,Y,Z)]) + {True:' ',False:'\n'}[options.twoD] )
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file['output'].write({True:'\n',False:''}[options.twoD])
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