DAMASK_EICMD/processing/pre/mentat_pbcOnBoxMesh.py

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#!/usr/bin/env python
import sys,os,pwd,math,re,string,numpy, damask
from optparse import OptionParser
sys.path.append(damask.solver.Marc().libraryPath('../../'))
try:
from py_mentat import *
except:
print('error: no valid Mentat release found')
sys.exit(-1)
def outMentat(cmd,locals):
if cmd[0:3] == '(!)':
exec(cmd[3:])
elif cmd[0:3] == '(?)':
cmd = eval(cmd[3:])
py_send(cmd)
else:
py_send(cmd)
return
def outStdout(cmd,locals):
if cmd[0:3] == '(!)':
exec(cmd[3:])
elif cmd[0:3] == '(?)':
cmd = eval(cmd[3:])
print cmd
else:
print cmd
return
def output(cmds,locals,dest):
for cmd in cmds:
if isinstance(cmd,list):
output(cmd,locals,dest)
else:
{\
'Mentat': outMentat,\
'Stdout': outStdout,\
}[dest](cmd,locals)
return
def servoLink():
cmds = []
base = ['x','y','z']
box = {'min': numpy.zeros(3,dtype='d'),
'max': numpy.zeros(3,dtype='d'),
'delta': numpy.zeros(3,dtype='d'),
}
Nnodes = py_get_int("nnodes()")
NodeCoords = numpy.zeros((Nnodes,3),dtype='d')
for node in xrange(Nnodes):
NodeCoords[node,0] = py_get_float("node_x(%i)"%(node+1))
NodeCoords[node,1] = py_get_float("node_y(%i)"%(node+1))
NodeCoords[node,2] = py_get_float("node_z(%i)"%(node+1))
box['min'] = NodeCoords.min(axis=0) # find the bounding box
box['max'] = NodeCoords.max(axis=0)
box['delta'] = box['max']-box['min']
for coord in xrange(3): # calc the dimension of the bounding box
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if box['delta'][coord] != 0.0:
for extremum in ['min','max']:
rounded = round(box[extremum][coord]*1e+15/box['delta'][coord]) * \
1e-15*box['delta'][coord] # rounding to 1e-15 of dimension
box[extremum][coord] = {False: rounded,
True: 0.0}[rounded == 0.0] # get rid of -0.0 (negative zeros)
baseNode = {}
linkNodes = []
for node in xrange(Nnodes): # loop over all nodes
pos = {}
key = {}
maxFlag = [False, False, False]
Nmax = 0
Nmin = 0
for coord in xrange(3): # for each direction
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if box['delta'][coord] != 0.0:
rounded = round(NodeCoords[node,coord]*1e+15/box['delta'][coord]) * \
1e-15*box['delta'][coord] # rounding to 1e-15 of dimension
NodeCoords[node,coord] = {False: rounded,
True: 0.0}[rounded == 0.0] # get rid of -0.0 (negative zeros)
key[base[coord]] = "%.8e"%NodeCoords[node,coord] # translate position to string
if (key[base[coord]] == "%.8e"%box['min'][coord]): # compare to min of bounding box (i.e. is on outer face?)
Nmin += 1 # count outer (back) face membership
elif (key[base[coord]] == "%.8e"%box['max'][coord]): # compare to max of bounding box (i.e. is on outer face?)
Nmax += 1 # count outer (front) face membership
maxFlag[coord] = True # remember face membership (for linked nodes)
if Nmin > 0 and Nmin > Nmax: # node is on more back than front faces
# prepare for any non-existing entries in the data structure
if key['x'] not in baseNode.keys():
baseNode[key['x']] = {}
if key['y'] not in baseNode[key['x']].keys():
baseNode[key['x']][key['y']] = {}
if key['z'] not in baseNode[key['x']][key['y']].keys():
baseNode[key['x']][key['y']][key['z']] = 0
baseNode[key['x']][key['y']][key['z']] = node+1 # remember the base node id
elif Nmax > 0 and Nmax >= Nmin: # node is on at least as many front than back faces
linkNodes.append({'id': node+1,'coord': NodeCoords[node], 'onFaces': Nmax,'faceMember': maxFlag})
baseCorner = baseNode["%.8e"%box['min'][0]]["%.8e"%box['min'][1]]["%.8e"%box['min'][2]] # detect ultimate base node
for node in linkNodes: # loop over all linked nodes
linkCoord = [node['coord']] # start list of control node coords with my coords
for dir in xrange(3): # check for each direction
if node['faceMember'][dir]: # me on this front face
linkCoord[0][dir] = box['min'][dir] # project me onto rear face along dir
linkCoord.append(box['min']) # append base corner
linkCoord[-1][dir] = box['max'][dir] # stretch it to corresponding control leg of "dir"
nLinks = len(linkCoord)
for dof in [1,2,3]:
cmds.append([
"*new_link *link_class servo",
"*link_class servo *tied_node %i"%node['id'],
"*link_class servo *tied_dof %i"%dof,
"*servo_nterms %i"%(1+nLinks),
])
for i in range(nLinks):
cmds.append([
"*link_class servo *servo_ret_node %i %i"%(i+1,baseNode["%.8e"%linkCoord[i][0]]["%.8e"%linkCoord[i][1]]["%.8e"%linkCoord[i][2]]),
"*link_class servo *servo_ret_dof %i %i"%(i+1,dof),
"*link_class servo *servo_ret_coef %i 1"%(i+1),
])
cmds.append([
"*link_class servo *servo_ret_node %i %i"%(1+nLinks,baseCorner),
"*link_class servo *servo_ret_dof %i %i"%(1+nLinks,dof),
"*link_class servo *servo_ret_coef %i -%i"%(1+nLinks,nLinks-1),
])
cmds.append([
"*select_nodes",
["%i"%node['id'] for node in linkNodes],
"#",
])
return cmds
# ----------------------- MAIN -------------------------------
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parser = OptionParser(usage='%prog [options]', description = """
Set up servo linking to achieve periodic boundary conditions for a regular hexahedral mesh presently opened in MSC.Mentat
""" + string.replace('$Id$','\n','\\n')
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)
parser.add_option("-p", "--port", type="int",\
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dest="port",\
help="Mentat connection port [%default]")
parser.add_option("-v", "--verbose", action="store_true",\
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dest="verbose",\
help="write Mentat command stream also to stdout [%default]")
parser.set_defaults(port = 40007)
parser.set_defaults(verbose = False)
(options, args) = parser.parse_args()
outputLocals = {}
print 'waiting to connect...'
py_connect('',options.port)
print 'connected...'
output([\
'*remove_all_servos',
'*sweep_all',
'*renumber_nodes',
'*set_links off',
],outputLocals,'Mentat') # script depends on consecutive numbering of nodes
cmds = servoLink()
output(cmds,outputLocals,'Mentat')
output([\
'*set_links on',
'*draw',
],outputLocals,'Mentat') # script depends on consecutive numbering of nodes
py_disconnect()
if options.verbose:
output(cmds,outputLocals,'Stdout')