Source Code for Module mbdyn.general

  1  #!/usr/bin/env python 
  2  # -*- coding: utf-8 -*- 
  3  # 
  4  # This file is part of MBDyn sim suite. 
  5  # Copyright (C) 2007 André ESPAZE, as part of a Master thesis supervised by 
  6  # Martin O.L.Hansen (DTU) and Nicolas Chauvat (Logilab) 
  7   
  8  # MBDyn sim suite is free software; you can redistribute it and/or modify 
  9  # it under the terms of the GNU General Public License as published by 
 10  # the Free Software Foundation; either version 2 of the License, or 
 11  # (at your option) any later version. 
 12  # 
 13  # This program is distributed in the hope that it will be useful, 
 14  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
 15  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 16  # GNU General Public License for more details. 
 17  # 
 18  # You should have received a copy of the GNU General Public License 
 19  # along with this program; if not, write to the Free Software 
 20  # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
 21  # 
 22  """All the built-in objects for working with MBDyn. 
 23   
 24  The two mains objects are C{NULL} and C{EYE}, there is also C{MATRIX_NULL}  
 25  in use. 
 26  C{NULL} is the vector null of size 3x1 
 27  C{EYE} is the identity matrix of size 3x3 
 28   
 29  The class L{Real} and L{Int} were started at the beginning but are not in use, 
 30  all the pre processing is done from Python. 
 31  """ 
 32  import numpy as N 
 33   
 34 -class Real: 
 35      """A MBDyn real for the input file 
 36      """ 
 37   
 38 -    def __init__(self, name=None, value=None, comment=None): 
 39          self.name = name 
 40          if not isinstance(value, float): 
 41              value = float(value) 
 42          self.value = value 
 43          self.comment = comment 
 44       
 45 -    def __repr__(self): 
 46          return self.__str__() 
 47       
 48 -    def __str__(self): 
 49          return "real %s = %f " % (self.name, self.value) 
 50   
 51   
 52 -class Int: 
 53      """A MBDyn integer for the input file 
 54      """ 
 55   
 56 -    def __init__(self, name=None, value=None, comment=None): 
 57          self.name = name 
 58          if not isinstance(value, int): 
 59              value = int(value) 
 60          self.value = value 
 61          self.comment = comment 
 62   
 63 -    def __repr__(self): 
 64          return self.__str__() 
 65       
 66 -    def __str__(self): 
 67          return "integer %s = %f " % (self.name, self.value) 
 68   
 69   
 70 -class Null: 
 71      """The vector Null 
 72      """ 
 73       
 74 -    def __init__(self): 
 75          self.value = N.array([0., 0., 0.]) 
 76          self.name = "null" 
 77   
 78   
 79 -class MatrixNull: 
 80      """The matrix Null 
 81      """ 
 82 -    def __init__(self): 
 83          self.value = N.array([[0., 0., 0.], 
 84                                [0., 0., 0.], 
 85                                [0., 0., 0.]]) 
 86          self.name = "null" 
 87   
 88   
 89 -class Eye: 
 90      """The eye matrix 
 91      """ 
 92   
 93 -    def __init__(self): 
 94          self.value = N.eye(3) 
 95          self.name = "eye" 
 96   
 97   
 98  # Those objects can just exist as instance, they are MBDyn built-in 
 99  NULL = Null() 
100  MAT_NULL = MatrixNull() 
101  EYE = Eye() 
102   
103  # Used by the MANAGER in 'common.py' for scanning the arguments 
104  EYE_NAME = "Eye" 
105  VECTOR_NAMES = ["Null"] 
106  MATRIX_NAMES = ["Eye", "MatrixNull"] 
107