src/MEDLoader/Swig/CaseReader.py

   1 #  -*- coding: iso-8859-1 -*-
   2 # Copyright (C) 2007-2016  CEA/DEN, EDF R&D
   3 #
   4 # This library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the License, or (at your option) any later version.
   8 #
   9 # This library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Lesser General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with this library; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17 #
  18 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  19 #
  20 # Author : Anthony GEAY (CEA/DEN/DM2S/STMF/LGLS)
  21
  22 # http://www-vis.lbl.gov/NERSC/Software/ensight/doc/OnlineHelp/UM-C11.pdf
  23 import numpy as np
  24 from MEDLoader import *
  25 from CaseIO import CaseIO
  26 import sys,re,os
  27
  28 class CaseReader(CaseIO):
  29     """ Converting a file in the Case format (Ensight) to the MED format.
  30     A new file with the same base name and the .med extension is created.
  31     """
  32
  33     @classmethod
  34     def New(cls,fileName):
  35         """ Static constructor. """
  36         return CaseReader(fileName)
  37         pass
  38
  39     def __init__(self,fileName):
  40         """ Constructor """
  41         CaseIO.__init__(self)
  42         self._fileName=fileName
  43         self._dirName=os.path.dirname(self._fileName)
  44         pass
  45
  46     def __traduceMesh(self,name,typ,coords,cells):
  47         """ Convert a CASE mesh into a MEDCouplingUMesh. """
  48         nbCoords=len(coords)
  49         coo=np.array(coords,dtype="float64") ; coo=coo.reshape(nbCoords,3)
  50         coo=DataArrayDouble(coo) ; coo=coo.fromNoInterlace()
  51         ct=self.dictMCTyp2[typ]
  52         m=MEDCouplingUMesh(str(name),MEDCouplingUMesh.GetDimensionOfGeometricType(ct))
  53         m.setCoords(coo)
  54         nbNodesPerCell=MEDCouplingMesh.GetNumberOfNodesOfGeometricType(ct)
  55         cI=DataArrayInt(len(cells)+1) ; cI.iota() ; cI*=nbNodesPerCell+1
  56         #
  57         cells2=cells.reshape(len(cells),nbNodesPerCell)
  58         if cells2.dtype=='int32':
  59             c2=DataArrayInt(cells2)
  60         else:
  61             c2=DataArrayInt(np.array(cells2,dtype="int32"))
  62             pass
  63         c=DataArrayInt(len(cells),nbNodesPerCell+1) ; c[:,0]=ct ; c[:,1:]=c2-1 ; c.rearrange(1)
  64         m.setConnectivity(c,cI,True)
  65         m.checkConsistency()
  66         return m
  67
  68     def __traduceMeshForPolyhed(self,name,coords,arr0,arr1,arr2):
  69         nbCoords=len(coords)
  70         coo=np.array(coords,dtype="float64") ; coo=coo.reshape(nbCoords,3)
  71         coo=DataArrayDouble(coo) ; coo=coo.fromNoInterlace()
  72         m=MEDCouplingUMesh(name,3)
  73         m.setCoords(coo)
  74         #
  75         arr2=arr2[:]-1
  76         arr0mc0=DataArrayInt(arr0) ; arr0mc0.computeOffsetsFull()
  77         arr0mc1=DataArrayInt(arr0).deepCopy()
  78         arr0mc2=DataArrayInt(len(arr0),2) ; arr0mc2[:,0]=DataArrayInt(arr0)-1 ; arr0mc2[:,1]=1 ; arr0mc2.rearrange(1) ; arr0mc2.computeOffsetsFull()
  79         arr0mc3=DataArrayInt.Range(0,2*len(arr0),2).buildExplicitArrByRanges(arr0mc2)
  80         arr1mc0=DataArrayInt(arr1) ; arr1mc0.computeOffsetsFull()
  81         arr1mc1=arr1mc0[arr0mc0] ; arr1mc1[1:]+=arr0mc0[1:]
  82         arr1mc2=DataArrayInt(arr1).deepCopy() ; arr1mc2+=1 ; arr1mc2.computeOffsetsFull()
  83         arr2mc0=(arr1mc2[1:])[arr0mc3]
  84         #
  85         c=DataArrayInt(arr1.size+arr2.size)
  86         c[arr1mc1[:-1]]=NORM_POLYHED
  87         c[arr2mc0]=-1
  88         a=arr2mc0.buildUnion(arr1mc1[:-1]).buildComplement(len(c))
  89         c[a]=DataArrayInt(arr2)
  90         #
  91         m.setConnectivity(c,arr1mc1,True)
  92         m.checkConsistency()
  93         return m
  94
  95     def __traduceMeshForPolygon(self,name,coords,arr0,arr1):
  96         nbCoords=len(coords)
  97         coo=np.array(coords,dtype="float64") ; coo=coo.reshape(nbCoords,3)
  98         coo=DataArrayDouble(coo) ; coo=coo.fromNoInterlace()
  99         m=MEDCouplingUMesh(name,2)
 100         m.setCoords(coo)
 101         #
 102         arr0_0=DataArrayInt(arr0+1) ; arr0_0.computeOffsetsFull()
 103         arr0_1=DataArrayInt(len(arr0),2) ; arr0_1[:,1]=DataArrayInt(arr0) ; arr0_1[:,0]=1 ; arr0_1.rearrange(1) ; arr0_1.computeOffsetsFull()
 104         arr0_2=DataArrayInt.Range(1,2*len(arr0),2).buildExplicitArrByRanges(arr0_1)
 105         c=DataArrayInt(len(arr0)+len(arr1)) ; c[:]=0 ; c[arr0_0[:-1]]=NORM_POLYGON
 106         c[arr0_2]=DataArrayInt(arr1-1)
 107         #
 108         m.setConnectivity(c,arr0_0,True)
 109         m.checkConsistency()
 110         return m
 111
 112     def __convertGeo2MED(self,geoFileName):
 113         """ Convert all the geometry (all the meshes) contained in the CASE file into MEDCouplingUMesh'es. """
 114         fd=open(os.path.join(self._dirName,geoFileName),"r+b") ; fd.seek(0,2) ; end=fd.tell() ; fd.seek(0) ; title=fd.read(80)
 115         title=title.strip().lower()
 116         if b"binary" not in title:
 117             raise Exception("Error only binary geo files are supported for the moment !")
 118             pass
 119         zeType=True
 120         if b"fortran" in title:
 121             mcmeshes=self.__convertGeo2MEDFortran(fd,end) ; zeType=False
 122         else:
 123             mcmeshes=self.__convertGeo2MEDC(fd,end)
 124         #
 125         ms=MEDFileMeshes()
 126         ms.resize(len(mcmeshes))
 127         for i,m in enumerate(mcmeshes):
 128             mlm=MEDFileUMesh()
 129             mlm.setMeshAtLevel(0,m)
 130             ms.setMeshAtPos(i,mlm)
 131             pass
 132         return mcmeshes,ms,zeType
 133
 134     def __convertGeo2MEDFortran(self,fd,end):
 135         mcmeshes=[]
 136         fd.read(80) # comment 1
 137         fd.read(80) # comment 2
 138         fd.read(80) # node id
 139         fd.read(80) # element id
 140         pos=fd.tell()
 141         elt=fd.read(80) ; elt=elt.strip() ; pos=fd.tell()
 142         mcmeshes2=[]
 143         typ=b"part"
 144         nbOfTurn=0
 145         while abs(pos-end)>8 and b"part" in typ:
 146             if b"part" not in elt:
 147                 raise Exception("Error on reading mesh fortran #1 !")
 148             fd.seek(fd.tell()+4)# skip #
 149             tmp=fd.read(80) ; meshName=tmp.split("P")[-1]
 150             tmp=fd.read(80)
 151             if b"coordinates" not in tmp:
 152                 raise Exception("Error on reading mesh fortran #2 !")
 153             pos=fd.tell() # 644
 154             if nbOfTurn==0:
 155                 pos+=76 # what else ?
 156             else:
 157                 pos+=40
 158                 pass
 159             nbNodes=np.memmap(fd,dtype='>i4',mode='r',offset=int(pos),shape=(1,)).tolist()[0]
 160             pos+=12 # what else ?
 161             a=np.memmap(fd,dtype='>f4',mode='r',offset=int(pos),shape=(nbNodes))
 162             b=np.memmap(fd,dtype='>f4',mode='r',offset=int(pos+nbNodes*4+2*4),shape=(nbNodes))
 163             c=np.memmap(fd,dtype='>f4',mode='r',offset=int(pos+nbNodes*2*4+4*4),shape=(nbNodes))
 164             coo=np.zeros(dtype=">f4",shape=(nbNodes*3))
 165             coo[:nbNodes]=a ; coo[nbNodes:2*nbNodes]=b ; coo[2*nbNodes:]=c
 166             coo=coo.reshape(nbNodes,3)
 167             pos+=nbNodes*3*4 ; fd.seek(pos)#np.array(0,dtype='float%i'%(typeOfCoo)).nbytes
 168             typ=fd.read(80).strip() ; pos=fd.tell()
 169             zeK=b""
 170             for k in self.dictMCTyp2:
 171                 if k in typ:
 172                     zeK=k
 173                     break
 174                     pass
 175                 pass
 176             pos+=8*4 # yeh man !
 177             nbCellsOfType=np.memmap(fd,dtype='>i4',mode='r',offset=int(pos),shape=(1,)).tolist()[0]
 178             pos+=4 # for the number of cells
 179             pos+=2*4 # because it's great !
 180             nbNodesPerCell=MEDCouplingMesh.GetNumberOfNodesOfGeometricType(self.dictMCTyp2[zeK])
 181             nodalConn=np.memmap(fd,dtype='>i4',mode='r',offset=pos,shape=(nbCellsOfType,nbNodesPerCell))
 182             meshName=meshName.strip()
 183             mcmeshes2.append(self.__traduceMesh(meshName,zeK,coo,nodalConn))
 184             pos+=nbNodesPerCell*nbCellsOfType*4
 185             if abs(pos-end)>8:
 186                 fd.seek(pos) ;elt=fd.read(80) ; typ=elt[:] ; pos+=80
 187                 pass
 188             nbOfTurn+=1
 189             pass
 190         #coo=mcmeshes2[0].getCoords() ; name=mcmeshes2[0].getName()
 191         #for itmesh in mcmeshes2: itmesh.setCoords(coo)
 192         #m=MEDCouplingUMesh.MergeUMeshesOnSameCoords(mcmeshes2) ; m.setName(name)
 193         #mcmeshes.append(m)
 194         return mcmeshes2
 195
 196     def __convertGeo2MEDC(self,fd,end):
 197         #fd.readline()
 198         #name=fd.readline().strip() ; fd.readline() ; fd.readline()
 199         name=fd.read(80)
 200         descrip=fd.read(80).strip() ; fd.read(80) ; fd.read(80)
 201         pos=fd.tell()
 202         mcmeshes=[]
 203         elt=fd.read(80) ; elt=elt.strip() ; pos+=80
 204         while pos!=end:
 205             if b"part" not in elt:
 206                 raise Exception("Error on reading mesh #1 !")
 207             fd.seek(fd.tell()+4)
 208             meshName=fd.read(80).strip()
 209             if fd.read(len("coordinates"))!=b"coordinates":
 210                 raise Exception("Error on reading mesh #2 !")
 211             pos=fd.tell()
 212             typeOfCoo=np.memmap(fd,dtype='byte',mode='r',offset=int(pos),shape=(1)).tolist()[0]
 213             pos+=1+17*4
 214             nbNodes=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(1,)).tolist()[0]
 215             pos+=4
 216             coo=np.memmap(fd,dtype='float32',mode='r',offset=int(pos),shape=(nbNodes,3))
 217             pos+=nbNodes*3*4 ; fd.seek(pos)#np.array(0,dtype='float%i'%(typeOfCoo)).nbytes
 218             typ=fd.read(80).strip() ; pos=fd.tell()
 219             mcmeshes2=[]
 220             while pos!=end and typ!=b"part":
 221                 if typ[0]=='\0': pos+=1; continue
 222                 mctyp=self.dictMCTyp2[typ]
 223                 nbCellsOfType=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(1,)).tolist()[0]
 224                 pos+=4
 225                 if mctyp!=NORM_POLYHED and mctyp!=NORM_POLYGON:
 226                     nbNodesPerCell=MEDCouplingMesh.GetNumberOfNodesOfGeometricType(mctyp)
 227                     cells=np.memmap(fd,dtype='int32',mode='r',offset=pos,shape=(nbCellsOfType,nbNodesPerCell))
 228                     pos+=nbCellsOfType*nbNodesPerCell*4
 229                     fd.seek(pos)
 230                     mcmeshes2.append(self.__traduceMesh(meshName,typ,coo,cells))
 231                 elif mctyp==NORM_POLYHED:
 232                     nbOfFacesPerCell=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(nbCellsOfType,))
 233                     pos+=nbCellsOfType*4
 234                     szOfNbOfNodesPerFacePerCellArr=int(nbOfFacesPerCell.sum())
 235                     arr1=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(szOfNbOfNodesPerFacePerCellArr,))#arr1 -> nbOfNodesPerFacePerCellArr
 236                     pos+=szOfNbOfNodesPerFacePerCellArr*4
 237                     szOfNodesPerFacePerCellArr=arr1.sum()
 238                     arr2=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(szOfNodesPerFacePerCellArr,))#arr2 -> nodesPerFacePerCellArr
 239                     pos+=szOfNodesPerFacePerCellArr*4 ; fd.seek(pos)
 240                     mcmeshes2.append(self.__traduceMeshForPolyhed(meshName,coo,nbOfFacesPerCell,arr1,arr2))
 241                     pass
 242                 else:
 243                     nbOfNodesPerCell=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(nbCellsOfType,))
 244                     pos+=nbCellsOfType*4
 245                     szOfNbOfNodesPerCellArr=int(nbOfNodesPerCell.sum())
 246                     arr1=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(szOfNbOfNodesPerCellArr,))
 247                     pos+=szOfNbOfNodesPerCellArr*4  ; fd.seek(pos)
 248                     mcmeshes2.append(self.__traduceMeshForPolygon(meshName,coo,nbOfNodesPerCell,arr1))
 249                 if pos!=end:
 250                     elt=fd.read(80) ; elt=elt.strip() ; typ=elt[:] ; pos+=80
 251                     pass
 252                 pass
 253             if mcmeshes2:
 254                 coo=mcmeshes2[0].getCoords() ; name=mcmeshes2[0].getName()
 255                 for itmesh in mcmeshes2: itmesh.setCoords(coo)
 256                 m=MEDCouplingUMesh.MergeUMeshesOnSameCoords(mcmeshes2) ; m.setName(name)
 257                 mcmeshes.append(m)
 258             pass
 259         return mcmeshes
 260
 261
 262     def __convertField(self,mlfields, mcmeshes, fileName, fieldName, discr, nbCompo, locId, it):
 263         """ Convert the fields. """
 264         stars=re.search("[\*]+",fileName).group()
 265         st="%0"+str(len(stars))+"i"
 266         trueFileName=fileName.replace(stars,st%(it))
 267         fd=open(os.path.join(self._dirName,trueFileName),"r+b") ; fd.seek(0,2) ; end=fd.tell() ; fd.seek(0)
 268         name=fd.read(80).strip().split(b" ")[0]
 269         if name!=fieldName:
 270             raise Exception("ConvertField : mismatch")
 271         pos=fd.tell()
 272         st=fd.read(80) ; st=st.strip() ; pos=fd.tell()
 273         while pos!=end:
 274             if st!=b"part":
 275                 raise Exception("ConvertField : mismatch #2")
 276             fdisc=MEDCouplingFieldDiscretization.New(self.discSpatial2[discr])
 277             meshId=np.memmap(fd,dtype='int32',mode='r',offset=int(pos),shape=(1)).tolist()[0]-1
 278             if meshId >= len( mcmeshes ):
 279                 return
 280             nbOfValues=fdisc.getNumberOfTuples(mcmeshes[meshId])
 281             vals2=DataArrayDouble(nbOfValues,nbCompo)
 282             fd.seek(pos+4)
 283             st=fd.read(80).strip() ; pos=fd.tell()
 284             offset=0
 285             while pos!=end and st!=b"part":
 286                 if st!=b"coordinates":
 287                     nbOfValsOfTyp=mcmeshes[meshId].getNumberOfCellsWithType(self.dictMCTyp2[st])
 288                 else:
 289                     nbOfValsOfTyp=nbOfValues
 290                     pass
 291                 vals=np.memmap(fd,dtype='float32',mode='r',offset=int(pos),shape=(nbOfValsOfTyp,nbCompo))#np.memmap(fd,dtype='int32',mode='r',offset=159,shape=(1))
 292                 vals2[offset:offset+nbOfValsOfTyp]=DataArrayDouble(np.array(vals,dtype='float64')).fromNoInterlace()
 293                 pos+=nbOfValsOfTyp*nbCompo*4 ; fd.seek(pos)
 294                 st=fd.read(80) ; st=st.strip() ; pos=fd.tell()
 295                 offset+=nbOfValsOfTyp
 296                 pass
 297             f=MEDCouplingFieldDouble(self.discSpatial2[discr],ONE_TIME) ; f.setName("%s_%s"%(fieldName,mcmeshes[meshId].getName()))
 298             f.setMesh(mcmeshes[meshId]) ; f.setArray(vals2) ; f.setTime(float(it),it,-1)
 299             f.checkConsistencyLight()
 300             mlfields[locId+meshId].appendFieldNoProfileSBT(f)
 301             pass
 302
 303     def __convertFieldFortran(self,mlfields, mcmeshes, fileName, fieldName, discr, nbCompo, locId, it):
 304         """ Convert the fields. """
 305         if re.search("[\*]+",fileName):
 306             stars=re.search("[\*]+",fileName).group()
 307             st="%0"+str(len(stars))+"i"
 308             trueFileName=fileName.replace(stars,st%(it))
 309             pass
 310         else:
 311             trueFileName=fileName
 312             pass
 313         fd=open(os.path.join(self._dirName,trueFileName),"r+b") ; fd.seek(0,2) ; end=fd.tell() ; fd.seek(0)
 314         name=fd.read(80)
 315         if fieldName not in name:
 316             raise Exception("ConvertField : mismatch")
 317         pos=fd.tell()
 318         st=fd.read(80) ; st=st.strip() ; pos=fd.tell()
 319         if b"part" not in st:
 320             raise Exception("ConvertField : mismatch #2")
 321         st=fd.read(80).strip() ; pos=fd.tell()
 322         pos+=12 # I love it
 323         offset=0
 324         nbTurn=0
 325         while pos!=end and b"part" not in st:
 326             fdisc=MEDCouplingFieldDiscretization.New(self.discSpatial2[discr])
 327             nbOfValues=fdisc.getNumberOfTuples(mcmeshes[nbTurn])
 328             vals2=DataArrayDouble(nbOfValues,nbCompo)
 329             pos+=24 # I love it again !
 330             nbOfValsOfTyp=np.memmap(fd,dtype='>i4',mode='r',offset=pos,shape=(1)).tolist()[0]/4
 331             pos+=4
 332             vals=np.zeros(dtype=">f4",shape=(nbOfValsOfTyp*nbCompo))
 333             for iii in range(nbCompo):
 334                 valsTmp=np.memmap(fd,dtype='>f4',mode='r',offset=int(pos),shape=(nbOfValsOfTyp))
 335                 vals[iii*nbOfValsOfTyp:(iii+1)*nbOfValsOfTyp]=valsTmp
 336                 pos+=nbOfValsOfTyp*4
 337                 pos+=2*4 ## hey hey, that is the ultimate class !
 338                 vals2.setInfoOnComponent(iii,chr(ord('X')+iii))
 339                 pass
 340             if pos>end:
 341                 pos=end
 342                 pass
 343             vals=vals.reshape(nbOfValsOfTyp,nbCompo)
 344             vals2[offset:offset+nbOfValsOfTyp]=DataArrayDouble(np.array(vals,dtype='float64')).fromNoInterlace()
 345             if pos!=end:
 346                 fd.seek(pos)
 347                 st=fd.read(80) ; st=st.strip() ; pos=fd.tell()
 348                 st=fd.read(80) ; st=st.strip() ; pos=fd.tell()
 349                 pass
 350             f=MEDCouplingFieldDouble(self.discSpatial2[discr],ONE_TIME) ; f.setName("%s_%s"%(fieldName,mcmeshes[nbTurn].getName()))
 351             f.setMesh(mcmeshes[nbTurn]) ; f.setArray(vals2) ; f.setTime(float(it),it,-1)
 352             f.checkConsistencyLight()
 353             mlfields[locId+nbTurn].appendFieldNoProfileSBT(f)
 354             nbTurn+=1
 355             pass
 356         pass
 357
 358     def loadInMEDFileDS(self):
 359         """ Load a CASE file into a MEDFileData object. """
 360         f=open(self._fileName)
 361         lines=f.readlines()
 362         ind=lines.index("GEOMETRY\n")
 363         if ind==-1:
 364             raise Exception("Error with file %s"%(fname))
 365         geoName=re.match("model:([\W]*)([\w\.]+)",lines[ind+1]).group(2)
 366         m1,m2,typeOfFile=self.__convertGeo2MED(geoName)
 367         fieldsInfo=[] ; nbOfTimeSteps=0
 368         if "VARIABLE\n" in lines:
 369             ind=lines.index("VARIABLE\n")
 370             end=len(lines)-1
 371             if "TIME\n" in lines:
 372                 end=lines.index("TIME\n")
 373                 pass
 374             for i in range(ind + 1,end):
 375                 m=re.match("^([\w]+)[\s]+\per[\s]+([\w]+)[\s]*\:[\s]*[0-9]*[\s]*([\w]+)[\s]+([\S]+)$",lines[i])
 376                 if m:
 377                     if m.groups()[0]=="constant":
 378                         continue
 379                     spatialDisc=m.groups()[1] ; fieldName=m.groups()[2] ; nbOfCompo=self.dictCompo2[m.groups()[0]] ; fieldFileName=m.groups()[3]
 380                     if fieldFileName.endswith("*"):
 381                       fieldsInfo.append((fieldName,spatialDisc,nbOfCompo,fieldFileName))
 382                     pass
 383                 pass
 384
 385             expr=re.compile("number[\s]+of[\s]+steps[\s]*\:[\s]*([\d]+)")
 386             tmp = [line for line in lines if expr.search(line)]
 387             if tmp:
 388                 nbOfTimeSteps = int(expr.search(tmp[0]).group(1))
 389                 expr=re.compile("filename[\s]+start[\s]+number[\s]*\:[\s]*([\d]+)")
 390                 startIt = int(expr.search([line for line in lines if expr.search(line)][0]).group(1))
 391                 expr=re.compile("filename[\s]+increment[\s]*\:[\s]*([\d]+)")
 392                 incrIt = int(expr.search([line for line in lines if expr.search(line)][0]).group(1))
 393             else:
 394                 nbOfTimeSteps=1
 395                 startIt=0
 396                 incrIt=1
 397                 pass
 398             curIt=startIt
 399             pass
 400         mlfields=MEDFileFields()
 401         mlfields.resize(len(fieldsInfo)*len(m1))
 402         i=0
 403         for field in fieldsInfo:
 404             for m in m1:
 405                 mlfields.setFieldAtPos(i,MEDFileFieldMultiTS())
 406                 i+=1
 407                 pass
 408             pass
 409         for ts in range(nbOfTimeSteps):
 410             i=0
 411             for field in fieldsInfo:
 412                 if typeOfFile:
 413                     self.__convertField(mlfields,m1,field[3],field[0],field[1],field[2],i,curIt);
 414                 else:
 415                     self.__convertFieldFortran(mlfields,m1,field[3],field[0],field[1],field[2],i,curIt)
 416                     pass
 417                 i+=len(m1)
 418                 pass
 419             curIt+=incrIt
 420             pass
 421         ret=MEDFileData()
 422         ret.setMeshes(m2)
 423         del mlfields[[x for x in range(len(mlfields)) if len(mlfields[x]) == 0]]
 424         ret.setFields(mlfields)
 425         return ret
 426
 427     pass