578 lines
27 KiB
Python
578 lines
27 KiB
Python
#***************************************************************************
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#* *
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#* Copyright (c) 2017 *
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#* FastFieldSolvers S.R.L. http://www.fastfieldsolvers.com *
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#* *
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#* This program is free software; you can redistribute it and/or modify *
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#* it under the terms of the GNU Lesser General Public License (LGPL) *
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#* as published by the Free Software Foundation; either version 2 of *
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#* the License, or (at your option) any later version. *
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#* for detail see the LICENCE text file. *
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#* *
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#* This program is distributed in the hope that it will be useful, *
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#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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#* GNU Library General Public License for more details. *
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#* *
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#* You should have received a copy of the GNU Library General Public *
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#* License along with this program; if not, write to the Free Software *
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#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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#* USA *
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#* *
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#***************************************************************************
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import FreeCAD, Mesh, Draft, Part, os
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from collections import namedtuple
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from FreeCAD import Vector
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if FreeCAD.GuiUp:
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import FreeCADGui
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from PySide import QtCore, QtGui
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else:
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def translate(ctxt,txt):
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return txt
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__title__="FreeCAD E.M. FasterCap Importer"
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__author__ = "FastFieldSolvers S.R.L."
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__url__ = "http://www.fastfieldsolvers.com"
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DEF_FOLDER = "."
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COLORMAP_LEN = 256
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AUTOREFINE_MAX_PARSE_LEVEL = 32
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# filePosMap members
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filePosData = namedtuple('filePosData', ['lineNum', 'filePos'])
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# global vars
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#
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m_lDielNum = 0
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m_lCondNum = 0
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m_iParseLevel = -1
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m_iGroupNum = [1]
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m_lGroupDielNum = 0
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m_bUseMesh = True
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# number of input panels
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m_ulInputPanelNum = 0
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def read_fastcap_file(filename, folder=DEF_FOLDER, usePartType='compound'):
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'''Import file in FasterCap format as Mesh or Part.compound
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'filename' is the name of the export file
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'folder' is the folder where the file resides
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Example:
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fastercapObj = read_fastcap_file('cube.txt')
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'''
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#
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# this function is a Python-converted version of the FasterCap C++
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# ReadFastCapFile() import function (and associated functions)
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#
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global m_lDielNum
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global m_lCondNum
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global m_iParseLevel
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global m_iGroupNum
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global m_lGroupDielNum
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global m_sUsePartType
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global m_ulInputPanelNum
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# init global vars
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m_lDielNum = 0
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m_lCondNum = 0
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m_iParseLevel = -1
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m_iGroupNum = [1 for x in range(0,AUTOREFINE_MAX_PARSE_LEVEL)]
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m_lGroupDielNum = 0
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m_sUsePartType = usePartType
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# init number of input panels
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m_ulInputPanelNum = 0
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if not os.path.isdir(folder):
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FreeCAD.Console.PrintMessage("Error: '" + folder + "' is not a valid folder\n")
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return False
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if not os.path.exists(folder + os.sep + filename):
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FreeCAD.Console.PrintMessage("Error: '" + filename + "' is not a valid file in the directory " + folder + "\n")
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return False
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# understand the type of input file (2D or 3D)
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fileinname =fol
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der + os.sep + filename
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line = ''
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try:
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with open(fileinname, 'r') as fid:
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line = fid.readline()
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fid.closed
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except OSError as err:
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FreeCAD.Console.PrintMessage("OS error: " + format(err) + "\n")
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return False
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# clear filePosMap dictionary
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filePosMap = {}
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if '2d' in line or '2D' in line:
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# passing dummy 'fid' and 'filePosMap' (that must be empty) since
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# there is no parent file
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ret = parse_2D_input_file(fileinname, fid, filePosMap);
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else:
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# passing dummy 'fid' and 'filePosMap' (that must be empty) since
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# there is no parent file
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ret = parse_3D_input_file(fileinname, fid, filePosMap);
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return ret
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def parse_2D_input_file(fileinname, fid, filePosMap, use_mesh):
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FreeCAD.Console.PrintMessage("Parse 2D\n")
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return True
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def parse_3D_input_file(fileinname, parentFid, parentFilePosMap, isdiel = False, offset = Vector(0.0, 0.0, 0.0),
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outperm = complex(1.0), groupname = '', inperm = complex(1.0), dielrefpoint = Vector(0.0, 0.0, 0.0)):
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global m_iParseLevel
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global m_iGroupNum
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global m_lGroupDielNum
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global m_sUsePartType
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global m_ulInputPanelNum
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# increment the recursion level counter
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m_iParseLevel = m_iParseLevel + 1
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if m_iParseLevel >= AUTOREFINE_MAX_PARSE_LEVEL:
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FreeCAD.Console.PrintMessage("Warning: maximum number (" + format(AUTOREFINE_MAX_PARSE_LEVEL) +
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") of recursive files exceeded, skipping file " + fileinname + "\n")
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return True
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# reset group number for current parse level
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m_iGroupNum[m_iParseLevel] = 1;
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# init filePosMap
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filePosMap = {}
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# check if the conductor file is a sub-file
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if fileinname in parentFilePosMap:
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# if it is a sub-file, copy parent data
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filePosMap = parentFilePosMap
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fid = parentFid
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try:
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# store current file position to restore it at the end
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# Remark: tell() in Python under Windows must be used with files opened as 'rb'
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# as Unix-style endings may cause tell() to return illegal values
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startPos = fid.tell()
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# and get linenum and position
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linenum = parentFilePosMap[fileinname].linenum
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fid.seek(parentFilePosMap[fileinname].filePos)
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except IOError as err:
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FreeCAD.Console.PrintMessage("OS error: " + format(err) + "\n")
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fid.closed
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return False
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else:
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try:
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# open the sub file id
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fid = open(fileinname, 'rb')
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linenum = 1
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fid.closed
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except OSError as err:
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FreeCAD.Console.PrintMessage("OS error: " + format(err) + "\n")
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return False
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# build the file map (for single input file)
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ret = create_file_map(fileinname, fid, filePosMap)
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if ret != True:
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return ret
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panelVertexes = []
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chargeDensity = []
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panelColors = []
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for line in fid:
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# if subfile definitions (starting or ending), stop here
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if line[0] in ('E', 'e', 'F', 'f'):
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break
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# now check for actual statements
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#
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# first split the line into the components
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splitLine = line.split()
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# if the line was actually composed only by separators, continue
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if len(splitLine) == 0:
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continue
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# if conductor file
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if splitLine[0] == 'C':
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try:
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# read file name
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name = splitline[1]
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# read outer permittivity
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if 'j' in splitline[2]:
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# as the complex format in FasterCap is 'a-jb' and not 'a-bj' as the Python 'complex' class
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# would like, this trick modifies the string to be parsable by 'complex'
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# Remark: we assume that the complex number has no spaces; FasterCap would accept
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# also syntax like 'a - jb', here it would cause errors
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localOutPerm = complex(splitline[2].replace('j', '') + 'j')
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else:
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localOutPerm = complex(splitline[2])
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# read offset coordinates
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localOffset = Vector(float(splitLine[3]), float(splitLine[4]), float(splitLine[5]))
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localOffset = localOffset + offset
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# compute group name (to distinguish between panels with the same
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# conductor name because in the same file called more than once)
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if m_iParseLevel == 0:
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localGroupname = "g"
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else:
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localGroupname = groupname
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localGroupname = localGroupname + str(m_iGroupNum[m_iParseLevel]) + '_'
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# read optional values
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if len(splitLine) >= 7:
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# read optional '+'. If not a '+', increment the group
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if splitLine[6] != '+':
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# increase group name
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m_iGroupNum[m_iParseLevel] = m_iGroupNum[m_iParseLevel] + 1
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# read optional color; if present, it is the last element of the line
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if splitLine[-1][0:2] in ("0x", "0X"):
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groupcolor = splitLine[5]
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# recurse into new conductor file
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m_iGroupNum[m_iParseLevel+1] = 1
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except (IndexError, ValueError):
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FreeCAD.Console.PrintMessage("Error in file " + fileinname + " at line " + format(linenum) + " : " + line + "\n")
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ret = Parse3DInputFile(name, fid, filePosMap, False, localOffset, localOutperm, localGroupname)
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if ret == False:
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break
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# if dielectric file
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if splitLine[0] == 'D':
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try:
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# read file name
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name = splitline[1]
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# read outer permittivity
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if 'j' in splitline[2]:
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# as the complex format in FasterCap is 'a-jb' and not 'a-bj' as the Python 'complex' class
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# would like, this trick modifies the string to be parsable by 'complex'
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# Remark: we assume that the complex number has no spaces; FasterCap would accept
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# also syntax like 'a - jb', here it would cause errors
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localOutPerm = complex(splitline[2].replace('j', '') + 'j')
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else:
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localOutPerm = complex(splitline[2])
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# read inner permittivity
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if 'j' in splitline[3]:
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# as the complex format in FasterCap is 'a-jb' and not 'a-bj' as the Python 'complex' class
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# would like, this trick modifies the string to be parsable by 'complex'
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# Remark: we assume that the complex number has no spaces; FasterCap would accept
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# also syntax like 'a - jb', here it would cause errors
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localOutPerm = complex(splitline[3].replace('j', '') + 'j')
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else:
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localOutPerm = complex(splitline[3])
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# read offset coordinates
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localOffset = Vector(float(splitLine[4]), float(splitLine[5]), float(splitLine[6]))
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localOffset = localOffset + offset
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# read dielectric reference point coordinates
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localDielrefpoint = Vector(float(splitLine[7]), float(splitLine[8]), float(splitLine[9]))
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localDielrefpoint = localDielrefpoint + offset
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# read optional values
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if len(splitLine) >= 11:
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# read optional '-'
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# if '-', reverse outperm and inperm;
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# in this way, the reference point is always on the outperm side
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if splitLine[10] == '-':
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localInperm, localOutperm = localOutperm, localInperm
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# read optional color; if present, it is the last element of the line
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if splitLine[-1][0:2] in ("0x", "0X"):
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groupcolor = splitLine[5]
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# compute dielectric name (to distinguish between panels
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# in the same file called more than once)
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localGroupname = "diel" + str(m_lGroupDielNum)
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sprintf(localGroupname, "diel%ld", m_lGroupDielNum)
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# increase group name
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m_lGroupDielNum = m_lGroupDielNum + 1
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except (IndexError, ValueError):
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FreeCAD.Console.PrintMessage("Error in file " + fileinname + " at line " + format(linenum) + " : " + line + "\n")
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# recurse into new dielectric file
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ret = Parse3DInputFile(name, fid, filePosMap, True, localOffset, localOutperm, localGroupname, localInperm, localDielrefpoint)
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if ret == False:
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break
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# if triangle
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if splitLine[0] == 'T':
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try:
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# read conductor name to which the patch belongs
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tmpname = splitline[1]
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# read panel coordinates
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#
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# if using mesh, we need a flat list of vertexes, that will be used in triplets
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# to build the triangular-only mesh faces
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if m_sUsePartType == 'mesh':
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panelVertexes.extend( [ [float(splitLine[2]), float(splitLine[3]), float(splitLine[4])],
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[float(splitLine[5]), float(splitLine[6]), float(splitLine[7])],
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[float(splitLine[8]), float(splitLine[9]), float(splitLine[10])] ])
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# if using faces, we need FreeCAD.Vector or tuple of three floats for each vertex, in a vector
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# with as many elements as the vertexes of the polygon supporting the face
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else:
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panelVertexes.append( [ (float(splitLine[2]), float(splitLine[3]), float(splitLine[4])),
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(float(splitLine[5]), float(splitLine[6]), float(splitLine[7])),
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(float(splitLine[8]), float(splitLine[9]), float(splitLine[10])) ])
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# read optional reference point
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if len(splitLine) >= 14:
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localDielrefpoint = Vector(float(splitLine[11]), float(splitLine[12]), float(splitLine[13]))
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localDielrefpoint = localDielrefpoint + offset
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uselocaldiel = True
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else
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uselocaldiel = False
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# read optional trailing charge density information, or color
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# Note that charge density is alternative to color (cannot have both), but charge density could
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# be confused with the last coordinate of the optional reference point. So if there are three
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# additional optional float values, this is the reference point, and if there is something else still,
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# this must be charge density or color; if there are not three additional optional float values,
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# but there is something else, again this must be charge density or color, so look at the last value
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# on the line
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if (uselocaldiel == True and len(splitLine) >= 15) or (uselocaldiel == false and len(splitline) >= 12):
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# if color, read it
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if splitLine[-1][0:2] in ("0x", "0X"):
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panelColors.append(splitLine[-1])
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else
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chargeDensity.append(float(splitLine[11]))
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except (IndexError, ValueError):
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FreeCAD.Console.PrintMessage("Error on line " + format(i) + " : " + line + "\n")
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name = groupname
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# if this is a conductor panel, compose the actual name; otherwise, for dielectric interfaces,
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# we can ignore specific conductor names
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if isdiel == False:
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# concat name with group name
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name = name + tmpname
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ret = GetConductor(&(itc), &dielIndex, name, isdiel, outpermRe, outpermIm, inpermRe, inpermIm, dielrefpoint)
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if(ret == False)
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break
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# ret = (long)CreatePanel(vertex, tmpname, dielIndex, &itc, fileinname, linenum, AUTOREFINE_SIMPLE_CREATE_PANEL, globalVars, uselocaldiel, localDielrefpoint);
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# counting panels (i.e. the panel # in the input file, no input refinement,
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# e.g. Q panels split in two triangles)
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if isdiel == False:
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m_ulInputPanelNum = m_ulInputPanelNum + 1
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else:
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m_ulInputPanelNum = m_ulInputPanelNum + 1
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return True
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def create_file_map(fileinname, fid, filePosMap)
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return False
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def import_fastercap(filename, folder=DEF_FOLDER, use_mesh=True):
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'''Import file in FasterCap format as Mesh or Part.compound
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'filename' is the name of the export file
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'folder' is the folder where the file resides
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Example:
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fastercapObj = import_fastercap('cube.txt')
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'''
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if not os.path.isdir(folder):
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FreeCAD.Console.PrintMessage("Error: '" + folder + "' is not a valid folder\n")
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return
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if not os.path.exists(folder + os.sep + filename):
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FreeCAD.Console.PrintMessage("Error: '" + filename + "' is not a valid file in the directory " + folder + "\n")
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return
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try:
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with open(folder + os.sep + filename, 'rb') as fid:
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# reset the list of triangle vertexes
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panelVertexes = []
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chargeDensity = []
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# and scan all the file
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for i, line in enumerate(fid):
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# if first line, or empty line, skip
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if i == 0 or line in ['', '\n', '\r\n']:
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continue
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# now check for actual statements
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#
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# first split the line into the components
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splitLine = line.split()
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# if the line was actually composed only by separators, continue
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if len(splitLine) == 0:
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continue
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# then check content
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#
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# if triangle
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if splitLine[0] == 'T':
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try:
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# if using mesh, we need a flat list of vertexed, that will be used in triplets
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# to build the triangular-only mesh faces
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if use_mesh == True:
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panelVertexes.extend( [ [float(splitLine[2]), float(splitLine[3]), float(splitLine[4])],
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[float(splitLine[5]), float(splitLine[6]), float(splitLine[7])],
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[float(splitLine[8]), float(splitLine[9]), float(splitLine[10])] ])
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# if using faces, we need FreeCAD.Vector or tuple of three floats for each vertex, in a vector
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# with as many elements as the vertexes of the polygon supporting the face
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else:
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panelVertexes.append( [ (float(splitLine[2]), float(splitLine[3]), float(splitLine[4])),
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(float(splitLine[5]), float(splitLine[6]), float(splitLine[7])),
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(float(splitLine[8]), float(splitLine[9]), float(splitLine[10])) ])
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except (IndexError, ValueError):
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FreeCAD.Console.PrintMessage("Error on line " + format(i) + " : " + line + "\n")
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# if there is trailing charge density information, store it
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if len(splitLine) >= 12:
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chargeDensity.append(float(splitLine[11]))
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# if quadrilateral
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if splitLine[0] == 'Q':
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try:
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if use_mesh == True:
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panelVertexes.extend( [ [float(splitLine[2]), float(splitLine[3]), float(splitLine[4])],
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[float(splitLine[5]), float(splitLine[6]), float(splitLine[7])],
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[float(splitLine[8]), float(splitLine[9]), float(splitLine[10])],
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[float(splitLine[2]), float(splitLine[3]), float(splitLine[4])],
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[float(splitLine[8]), float(splitLine[9]), float(splitLine[10])],
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[float(splitLine[11]), float(splitLine[12]), float(splitLine[13])] ])
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# if there is trailing charge density information, store it
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if len(splitLine) >= 15:
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# add twice, as a quadrilateral panel spits into two triangles in a triangular mesh
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chargeDensity.extend([float(splitLine[14]), float(splitLine[14])])
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else:
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panelVertexes.extend( [[ (float(splitLine[2]), float(splitLine[3]), float(splitLine[4])),
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(float(splitLine[5]), float(splitLine[6]), float(splitLine[7])),
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(float(splitLine[8]), float(splitLine[9]), float(splitLine[10])),
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(float(splitLine[11]), float(splitLine[12]), float(splitLine[13])) ]])
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# if there is trailing charge density information, store it
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|
if len(splitLine) >= 15:
|
|
chargeDensity.append(float(splitLine[14]))
|
|
except ValueError:
|
|
FreeCAD.Console.PrintMessage("Error on line " + format(i) + " : " + line + "\n")
|
|
# if there is trailing charge density information, store it
|
|
if len(splitLine) >= 15:
|
|
chargeDensity.append(float(splitLine[14]))
|
|
|
|
fid.closed
|
|
|
|
except OSError as err:
|
|
FreeCAD.Console.PrintMessage("OS error: " + format(err) + "\n")
|
|
return
|
|
|
|
if use_mesh == True:
|
|
# now create the mesh. As of FreeCAD 0.16 we cannot color the mesh faces individually,
|
|
# so we'll ignore the charge information, even if present
|
|
fastercapMesh = Mesh.Mesh(panelVertexes)
|
|
# and show it
|
|
Mesh.show(fastercapMesh)
|
|
return fastercapMesh
|
|
else:
|
|
# check if there is charge information
|
|
if len(chargeDensity) > 0:
|
|
# check if every panel has the info
|
|
if len(chargeDensity) != len(panelVertexes):
|
|
FreeCAD.Console.PrintMessage("\nWarning: charge densities vector has length " +
|
|
format(len(chargeDensity)) + " while panels are " +
|
|
format(len(panelVertexes)))
|
|
chargeDensity = []
|
|
# create faces
|
|
facelist = []
|
|
for panel in panelVertexes:
|
|
# to create closed wires, the last point should be identical to the first
|
|
wirepoly = Part.makePolygon(panel + [panel[0]])
|
|
face = Part.Face(wirepoly)
|
|
facelist.append(face)
|
|
# cannot use a shell, otherwise face order will be all scrambled up,
|
|
# as Part will stitch faces when building the shell, cutting the
|
|
# edges where there are other triangle vertexes in contact, and
|
|
# doing so changes the face order
|
|
#shellObj = Part.makeShell(facelist)
|
|
# a compound instead will just contain a list of faces
|
|
compObj = Part.makeCompound(facelist)
|
|
# might use "Part.show(compObj)" but we need access to the Part::Feature 'featObj'
|
|
# to be able to change its ViewObject properties
|
|
doc = App.ActiveDocument
|
|
partFeatObj = doc.addObject("Part::Feature","FasterCap_Compound")
|
|
partFeatObj.Shape = compObj
|
|
doc.recompute()
|
|
# add density color
|
|
if len(chargeDensity) > 0:
|
|
# create colormap
|
|
gradTable = [ (0.0, 1.0, 1.0), (0.0, 0.0, 1.0),
|
|
(0.0, 0.0, 0.0), (1.0, 0.0, 0.0), (1.0, 1.0, 0.0)]
|
|
colorMap = colormap(gradTable)
|
|
|
|
#
|
|
# create gradient table (debug only). Should implement using Pivy to have a fixed table at the side
|
|
#~ facelist = []
|
|
#~ for i in range(0,256):
|
|
#~ wirepoly = Part.makePolygon( [ (0.0, i*10.0, 0.0), (0.0, (i+1)*10.0, 0.0), (0.0, (i+1)*10.0, 50.0),
|
|
#~ (0.0, i*10.0, 50.0), (0.0, i*10.0, 0.0) ] )
|
|
#~ face = Part.Face(wirepoly)
|
|
#~ facelist.append(face)
|
|
#~ shellGradObj = Part.makeShell(facelist)
|
|
#~ gradObj = doc.addObject("Part::Feature","Gradient_Table")
|
|
#~ gradObj.Shape = shellGradObj
|
|
#~ doc.recompute()
|
|
#~ gradObj.ViewObject.DiffuseColor = [colorMap[x] for x in range(0,256)]
|
|
# end debug
|
|
#
|
|
|
|
# convert the charge density values into color indexes
|
|
coeff = (COLORMAP_LEN - 1) / (max(chargeDensity) - min(chargeDensity))
|
|
partFeatObj.ViewObject.DiffuseColor = [colorMap[(int)((x-min(chargeDensity))*coeff)] for x in chargeDensity]
|
|
return partFeatObj
|
|
|
|
def colormap(gradientTable, maplen = COLORMAP_LEN):
|
|
'''create a color map based on the given gradient table.
|
|
|
|
'gradientTable' is a list of colors, represented as 3-tuples
|
|
'maplen' is the length of the map that will be generated.
|
|
The map will consist of 4-tuples, where the 4th
|
|
element (alpha, transparency) is always zero.
|
|
|
|
Example:
|
|
gradientTable = [ (1.0, 0.0, 0.0), (0.0, 1.0, 0.0), (0.0, 0.0, 1.0)]
|
|
myMap = colormap(gradientTable)
|
|
'''
|
|
colorMap = []
|
|
step = maplen / (float)(len(gradientTable) - 1)
|
|
for i in range(0, maplen):
|
|
gradientIndex = (int) (i/step)
|
|
base = (int) (gradientIndex * step)
|
|
# init color
|
|
color = [0.0, 0.0, 0.0, 0.0]
|
|
for j in range(0,3):
|
|
colorstep = (gradientTable[gradientIndex+1][j] - gradientTable[gradientIndex][j]) / step
|
|
color[j] = gradientTable[gradientIndex][j] + (i-base)*colorstep
|
|
if(color[j] > 1.0):
|
|
color[j] = 1.0
|
|
elif(color[j] < 0.0):
|
|
color[j] = 0.0
|
|
colorMap.append((color[0], color[1], color[2], 0.0))
|
|
return colorMap
|
|
|
|
|