Major Update of Pizza3 (a lot of POST tools, region working with forcefield)

Author: ovitrac

pizza/region.py

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+wget https://raw.githubusercontent.com/CFDEMproject/LAMMPS/master/python/examples/pizza/dump.py

pizza/src/HowToRegenerateDump.txt

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+# Pizza.py toolkit, www.cs.sandia.gov/~sjplimp/pizza.html
+# Steve Plimpton, sjplimp@sandia.gov, Sandia National Laboratories
+#
+# Copyright (2005) Sandia Corporation.  Under the terms of Contract
+# DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
+# certain rights in this software.  This software is distributed under 
+# the GNU General Public License.
+
+# data tool
+
+oneline = "Read, write, manipulate LAMMPS data files"
+
+docstr = """
+d = data("data.poly")            read a LAMMPS data file, can be gzipped
+d = data()			 create an empty data file
+
+d.map(1,"id",3,"x")              assign names to atom columns (1-N)
+
+coeffs = d.get("Pair Coeffs")    extract info from data file section
+q = d.get("Atoms",4)
+
+  1 arg = all columns returned as 2d array of floats
+  2 args = Nth column returned as vector of floats
+
+d.reorder("Atoms",1,3,2,4,5)     reorder columns (1-N) in a data file section
+
+  1,3,2,4,5 = new order of previous columns, can delete columns this way
+
+d.title = "My LAMMPS data file"	 set title of the data file
+d.headers["atoms"] = 1500        set a header value
+d.sections["Bonds"] = lines      set a section to list of lines (with newlines)
+d.delete("bonds")		 delete a keyword or section of data file
+d.delete("Bonds")
+d.replace("Atoms",5,vec)      	 replace Nth column of section with vector
+d.newxyz(dmp,1000)		 replace xyz in Atoms with xyz of snapshot N
+
+  newxyz assumes id,x,y,z are defined in both data and dump files
+    also replaces ix,iy,iz if they are defined
+  
+index,time,flag = d.iterator(0/1)          loop over single data file snapshot
+time,box,atoms,bonds,tris,lines = d.viz(index)   return list of viz objects
+
+  iterator() and viz() are compatible with equivalent dump calls
+  iterator() called with arg = 0 first time, with arg = 1 on subsequent calls
+    index = timestep index within dump object (only 0 for data file)
+    time = timestep value (only 0 for data file)
+    flag = -1 when iteration is done, 1 otherwise
+  viz() returns info for specified timestep index (must be 0)
+    time = 0
+    box = [xlo,ylo,zlo,xhi,yhi,zhi]
+    atoms = id,type,x,y,z for each atom as 2d array
+    bonds = id,type,x1,y1,z1,x2,y2,z2,t1,t2 for each bond as 2d array
+      NULL if bonds do not exist
+    tris = NULL
+    lines = NULL
+    
+d.write("data.new")             write a LAMMPS data file
+"""
+
+# History
+#   8/05, Steve Plimpton (SNL): original version
+#   11/07, added triclinic box support
+
+# ToDo list
+
+# Variables
+#   title = 1st line of data file
+#   names = dictionary with atom attributes as keys, col #s as values 
+#   headers = dictionary with header name as key, value or tuple as values
+#   sections = dictionary with section name as key, array of lines as values
+#   nselect = 1 = # of snapshots
+
+# Imports and external programs
+
+from os import popen
+
+try: tmp = PIZZA_GUNZIP
+except: PIZZA_GUNZIP = "gunzip"
+
+# Class definition
+
+class data:
+
+  # --------------------------------------------------------------------
+
+  def __init__(self,*list):
+    self.nselect = 1
+    
+    if len(list) == 0:
+      self.title = "LAMMPS data file"
+      self.names = {}
+      self.headers = {}
+      self.sections = {}
+      return
+
+    file = list[0]
+    if file[-3:] == ".gz": f = popen("%s -c %s" % (PIZZA_GUNZIP,file),'r')
+    else: f = open(file)
+
+    self.title = f.readline()
+    self.names = {}
+    
+    headers = {}
+    while 1:
+      line = f.readline()
+      line = line.strip()
+      if len(line) == 0:
+        continue
+      found = 0
+      for keyword in hkeywords:
+        if line.find(keyword) >= 0:
+	  found = 1
+	  words = line.split()
+	  if keyword == "xlo xhi" or keyword == "ylo yhi" or \
+	    keyword == "zlo zhi":
+	    headers[keyword] = (float(words[0]),float(words[1]))
+	  elif keyword == "xy xz yz":
+	    headers[keyword] = \
+              (float(words[0]),float(words[1]),float(words[2]))
+          else:
+	    headers[keyword] = int(words[0])
+      if not found:
+        break
+
+    sections = {}
+    while 1:
+      found = 0
+      for pair in skeywords:
+        keyword,length = pair[0],pair[1]
+        if keyword == line:
+	  found = 1
+          if not headers.has_key(length):
+            raise StandardError, \
+                  "data section %s has no matching header value" % line
+	  f.readline()
+          list = []
+          for i in xrange(headers[length]): list.append(f.readline())
+          sections[keyword] = list
+      if not found:
+        raise StandardError,"invalid section %s in data file" % line
+      f.readline()
+      line = f.readline()
+      if not line:
+        break
+      line = line.strip()
+      
+    f.close()
+    self.headers = headers
+    self.sections = sections
+
+  # --------------------------------------------------------------------
+  # assign names to atom columns
+
+  def map(self,*pairs):
+    if len(pairs) % 2 != 0:
+      raise StandardError, "data map() requires pairs of mappings"
+    for i in range(0,len(pairs),2):
+      j = i + 1
+      self.names[pairs[j]] = pairs[i]-1
+
+  # --------------------------------------------------------------------
+  # extract info from data file fields
+
+  def get(self,*list):
+    if len(list) == 1:
+      field = list[0]
+      array = []
+      lines = self.sections[field]
+      for line in lines:
+        words = line.split()
+        values = map(float,words)
+        array.append(values)
+      return array
+    elif len(list) == 2:
+      field = list[0]
+      n = list[1] - 1
+      vec = []
+      lines = self.sections[field]
+      for line in lines:
+        words = line.split()
+        vec.append(float(words[n]))
+      return vec
+    else:
+      raise StandardError, "invalid arguments for data.get()"
+
+  # --------------------------------------------------------------------
+  # reorder columns in a data file field
+
+  def reorder(self,name,*order):
+    n = len(order)
+    natoms = len(self.sections[name])
+    oldlines = self.sections[name]
+    newlines = natoms*[""]
+    for index in order:
+      for i in xrange(len(newlines)):
+        words = oldlines[i].split()
+        newlines[i] += words[index-1] + " "
+    for i in xrange(len(newlines)):
+      newlines[i] += "\n"
+    self.sections[name] = newlines
+
+  # --------------------------------------------------------------------
+  # replace a column of named section with vector of values
+
+  def replace(self,name,icol,vector):
+    lines = self.sections[name]
+    newlines = []
+    j = icol - 1
+    for i in xrange(len(lines)):
+      line = lines[i]
+      words = line.split()
+      words[j] = str(vector[i])
+      newline = ' '.join(words) + '\n'
+      newlines.append(newline)
+    self.sections[name] = newlines
+
+  # --------------------------------------------------------------------
+  # replace x,y,z in Atoms with x,y,z values from snapshot ntime of dump object
+  # assumes id,x,y,z are defined in both data and dump files
+  # also replaces ix,iy,iz if they are defined
+
+  def newxyz(self,dm,ntime):
+    nsnap = dm.findtime(ntime)
+
+    dm.sort(ntime)
+    x,y,z = dm.vecs(ntime,"x","y","z")
+
+    self.replace("Atoms",self.names['x']+1,x)
+    self.replace("Atoms",self.names['y']+1,y)
+    self.replace("Atoms",self.names['z']+1,z)
+    
+    if dm.names.has_key("ix") and self.names.has_key("ix"):
+      ix,iy,iz = dm.vecs(ntime,"ix","iy","iz")
+      self.replace("Atoms",self.names['ix']+1,ix)
+      self.replace("Atoms",self.names['iy']+1,iy)
+      self.replace("Atoms",self.names['iz']+1,iz)
+      
+  # --------------------------------------------------------------------
+  # delete header value or section from data file
+
+  def delete(self,keyword):
+
+    if self.headers.has_key(keyword): del self.headers[keyword]
+    elif self.sections.has_key(keyword): del self.sections[keyword]
+    else: raise StandardError, "keyword not found in data object"
+
+  # --------------------------------------------------------------------
+  # write out a LAMMPS data file
+
+  def write(self,file):
+    f = open(file,"w")
+    print >>f,self.title
+    for keyword in hkeywords:
+      if self.headers.has_key(keyword):
+        if keyword == "xlo xhi" or keyword == "ylo yhi" or \
+               keyword == "zlo zhi":
+	  pair = self.headers[keyword]
+	  print >>f,pair[0],pair[1],keyword
+        elif keyword == "xy xz yz":
+	  triple = self.headers[keyword]
+	  print >>f,triple[0],triple[1],triple[2],keyword
+        else:
+	  print >>f,self.headers[keyword],keyword
+    for pair in skeywords:
+      keyword = pair[0]
+      if self.sections.has_key(keyword):
+        print >>f,"\n%s\n" % keyword
+        for line in self.sections[keyword]:
+	  print >>f,line,
+    f.close()
+
+  # --------------------------------------------------------------------
+  # iterator called from other tools
+
+  def iterator(self,flag):
+    if flag == 0: return 0,0,1
+    return 0,0,-1
+
+  # --------------------------------------------------------------------
+  # time query from other tools
+
+  def findtime(self,n):
+    if n == 0: return 0
+    raise StandardError, "no step %d exists" % (n)
+   
+  # --------------------------------------------------------------------
+  # return list of atoms and bonds to viz for data object
+
+  def viz(self,isnap):
+    if isnap: raise StandardError, "cannot call data.viz() with isnap != 0"
+    
+    id = self.names["id"]
+    type = self.names["type"]
+    x = self.names["x"]
+    y = self.names["y"]
+    z = self.names["z"]
+    
+    xlohi = self.headers["xlo xhi"]
+    ylohi = self.headers["ylo yhi"]
+    zlohi = self.headers["zlo zhi"]
+    box = [xlohi[0],ylohi[0],zlohi[0],xlohi[1],ylohi[1],zlohi[1]]
+
+    # create atom list needed by viz from id,type,x,y,z
+
+    atoms = []
+    atomlines = self.sections["Atoms"]
+    for line in atomlines:
+      words = line.split()
+      atoms.append([int(words[id]),int(words[type]),
+                    float(words[x]),float(words[y]),float(words[z])])
+
+    # create list of current bond coords from list of bonds
+    # assumes atoms are sorted so can lookup up the 2 atoms in each bond
+
+    bonds = []
+    if self.sections.has_key("Bonds"):
+      bondlines = self.sections["Bonds"]
+      for line in bondlines:
+        words = line.split()
+        bid,btype   = int(words[0]),int(words[1])
+        atom1,atom2 = int(words[2]),int(words[3])
+        atom1words  = atomlines[atom1-1].split()
+        atom2words  = atomlines[atom2-1].split()
+        bonds.append([bid,btype,
+                      float(atom1words[x]),float(atom1words[y]),
+                      float(atom1words[z]),
+                      float(atom2words[x]),float(atom2words[y]),
+                      float(atom2words[z]),
+		      float(atom1words[type]),float(atom2words[type])])
+      
+    tris = []
+    lines = []
+    return 0,box,atoms,bonds,tris,lines
+
+  # --------------------------------------------------------------------
+  # return box size
+
+  def maxbox(self):
+    xlohi = self.headers["xlo xhi"]
+    ylohi = self.headers["ylo yhi"]
+    zlohi = self.headers["zlo zhi"]
+    return [xlohi[0],ylohi[0],zlohi[0],xlohi[1],ylohi[1],zlohi[1]]
+
+  # --------------------------------------------------------------------
+  # return number of atom types
+
+  def maxtype(self):
+    return self.headers["atom types"]
+
+# --------------------------------------------------------------------
+# data file keywords, both header and main sections
+
+hkeywords = ["atoms","ellipsoids","lines","triangles","bodies",
+             "bonds","angles","dihedrals","impropers",
+	     "atom types","bond types","angle types","dihedral types",
+	     "improper types","xlo xhi","ylo yhi","zlo zhi","xy xz yz"]
+
+skeywords = [["Masses","atom types"],
+             ["Atoms","atoms"],["Ellipsoids","ellipsoids"],
+             ["Lines","lines"],["Triangles","triangles"],["Bodies","bodies"],
+             ["Bonds","bonds"],
+	     ["Angles","angles"],["Dihedrals","dihedrals"],
+	     ["Impropers","impropers"],["Velocities","atoms"],
+             ["Pair Coeffs","atom types"],
+	     ["Bond Coeffs","bond types"],["Angle Coeffs","angle types"],
+	     ["Dihedral Coeffs","dihedral types"],
+	     ["Improper Coeffs","improper types"],
+             ["BondBond Coeffs","angle types"],
+             ["BondAngle Coeffs","angle types"],
+             ["MiddleBondTorsion Coeffs","dihedral types"],
+             ["EndBondTorsion Coeffs","dihedral types"],
+             ["AngleTorsion Coeffs","dihedral types"],
+             ["AngleAngleTorsion Coeffs","dihedral types"],
+             ["BondBond13 Coeffs","dihedral types"],
+             ["AngleAngle Coeffs","improper types"],
+             ["Molecules","atoms"],
+             ["Tinker Types","atoms"]]
+