DAMASK_EICMD/processing/pre/mentat_pbcOnBoxMesh.py

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#!/usr/bin/env python
import sys,os,pwd,math,re,string,msc_tools
from optparse import OptionParser
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sys.path.append(msc_tools.MSC_TOOLS().library_paths(sys.argv[0],'../../'))
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': {'x': float(sys.maxint),'y': float(sys.maxint),'z': float(sys.maxint)},
'max': {'x':-float(sys.maxint),'y':-float(sys.maxint),'z':-float(sys.maxint)},
'delta': {'x':0,'y':0,'z':0},
}
Nnodes = py_get_int("nnodes()")
NodeCoords = [{'x':py_get_float("node_x(%i)"%(node)),
'y':py_get_float("node_y(%i)"%(node)),
'z':py_get_float("node_z(%i)"%(node)),} for node in range(1,1+Nnodes)]
for node in range(Nnodes): # find the bounding box
for coord in base: # check each direction in turn
box['min'][coord] = min(box['min'][coord],NodeCoords[node][coord])
box['max'][coord] = max(box['max'][coord],NodeCoords[node][coord])
for coord in base: # calc the dimension of the bounding box
box['delta'][coord] = box['max'][coord] - box['min'][coord]
baseNode = {}
linkNodes = []
for node in range(Nnodes): # loop over all nodes
pos = {}
key = {}
maxFlag = {'x': False, 'y': False, 'z': False}
Nmax = 0
Nmin = 0
for coord in base: # for each direction
key[coord] = "%.8e"%NodeCoords[node][coord] # translate position to string
if (key[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[coord] == "%.8e"%box['max'][coord]): # compare to max of bounding box (i.e. is on outer face?)
Nmax += 1 # count outer (front) face memebership
maxFlag[coord] = True # remember face membership (for linked nodes)
if Nmin > 0 and Nmin > Nmax: # node is on more back than font 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']['x']]["%.8e"%box['min']['y']]["%.8e"%box['min']['z']] # 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 base: # 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({'x':box['min']['x'],'y':box['min']['y'],'z':box['min']['z'],}) # 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]['x']]["%.8e"%linkCoord[i]['y']]["%.8e"%linkCoord[i]['z']]),
"*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)
output([\
'*remove_all_servos',
'*sweep_all',
'*renumber_nodes',
'*set_links off',
],outputLocals,'Mentat') # script depends on consecutive numbering of nodes
cmds = servoLink()
print 'connected...'
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')