69 lines
2.9 KiB
Python
Executable File
69 lines
2.9 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,re,math,random
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import numpy as np
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from optparse import OptionParser
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import damask
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scriptID = string.replace('$Id$','\n','\\n')
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scriptName = scriptID.split()[1][:-3]
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# --------------------------------------------------------------------
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# MAIN
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# --------------------------------------------------------------------
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parser = OptionParser(option_class=damask.extendableOption, usage='%prog [options]', description = """
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Distribute given number of points randomly within the three-dimensional cube [0.0,0.0,0.0]--[1.0,1.0,1.0].
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Reports positions with random crystal orientations in seeds file format to STDOUT.
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""", version = scriptID)
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parser.add_option('-N', dest='N', type='int', metavar='int', \
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help='number of seed points to distribute [%default]')
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parser.add_option('-g','--grid', dest='grid', type='int', nargs=3, metavar='int int int', \
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help='min a,b,c grid of hexahedral box %default')
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parser.add_option('-r', '--rnd', dest='randomSeed', type='int', metavar='int', \
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help='seed of random number generator [%default]')
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parser.set_defaults(randomSeed = None)
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parser.set_defaults(grid = (16,16,16))
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parser.set_defaults(N = 20)
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(options, extras) = parser.parse_args()
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Npoints = reduce(lambda x, y: x * y, options.grid)
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if 0 in options.grid:
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file['croak'].write('invalid grid a b c.\n')
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sys.exit()
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if options.N > Npoints:
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sys.stderr.write('Warning: more seeds than grid points at minimum resolution.\n')
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options.N = Npoints
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if options.randomSeed == None:
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options.randomSeed = int(os.urandom(4).encode('hex'), 16)
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seeds = np.zeros((3,options.N),float)
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np.random.seed(options.randomSeed)
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grainEuler = np.random.rand(3,options.N)
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grainEuler[0,:] *= 360.0
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grainEuler[1,:] = np.arccos(2*grainEuler[1,:]-1)*180.0/math.pi
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grainEuler[2,:] *= 360.0
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seedpoint = np.random.permutation(Npoints)[:options.N]
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seeds[0,:]=(np.mod(seedpoint ,options.grid[0])\
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+np.random.random())/options.grid[0]
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seeds[1,:]=(np.mod(seedpoint// options.grid[0] ,options.grid[1])\
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+np.random.random())/options.grid[1]
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seeds[2,:]=(np.mod(seedpoint//(options.grid[1]*options.grid[0]),options.grid[2])\
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+np.random.random())/options.grid[2]
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sys.stdout.write("5\theader\n")
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sys.stdout.write(scriptID + " " + " ".join(sys.argv[1:])+"\n")
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sys.stdout.write("grid\ta {}\tb {}\tc {}\n".format(options.grid[0],options.grid[1],options.grid[2]))
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sys.stdout.write("microstructures\t{}\n".format(options.N))
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sys.stdout.write("randomSeed\t{}\n".format(options.randomSeed))
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sys.stdout.write("x\ty\tz\tphi1\tPhi\tphi2\n")
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np.savetxt(sys.stdout,np.transpose(np.concatenate((seeds,grainEuler),axis = 0)),fmt='%10.6f',delimiter='\t')
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