Cura/util/gcodeInterpreter.py

   1 from __future__ import absolute_import
   2 import __init__
   3
   4 import sys
   5 import math
   6 import re
   7 import os
   8
   9 from util import util3d
  10
  11 class gcodePath():
  12         def __init__(self, newType, pathType, layerNr, startPoint):
  13                 self.type = newType
  14                 self.pathType = pathType
  15                 self.list = [startPoint]
  16                 self.layerNr = layerNr
  17
  18 class gcode():
  19         def __init__(self):
  20                 self.regMatch = {}
  21                 self.layerCount = 0
  22                 self.pathList = []
  23                 self.extrusionAmount = 0
  24                 self.totalMoveTimeMinute = 0
  25                 self.progressCallback = None
  26
  27         def load(self, filename):
  28                 fileSize = os.stat(filename).st_size
  29                 filePos = 0
  30                 gcodeFile = open(filename, 'r')
  31                 pos = util3d.Vector3()
  32                 posOffset = util3d.Vector3()
  33                 currentE = 0.0
  34                 totalExtrusion = 0.0
  35                 maxExtrusion = 0.0
  36                 totalMoveTimeMinute = 0.0
  37                 pathList = []
  38                 scale = 1.0
  39                 posAbs = True
  40                 feedRate = 3600
  41                 pathType = 'CUSTOM';
  42                 layerNr = 0;    #Note layer 0 will be the start code.
  43                 startCodeDone = False
  44                 currentPath = gcodePath('move', pathType, layerNr, pos.copy())
  45                 currentPath.list[0].e = totalExtrusion
  46                 pathList.append(currentPath)
  47                 for line in gcodeFile:
  48                         if filePos != gcodeFile.tell():
  49                                 filePos = gcodeFile.tell()
  50                                 if self.progressCallback != None:
  51                                         self.progressCallback(float(filePos) / float(fileSize))
  52                         if line.startswith(';TYPE:'):
  53                                 pathType = line[6:].strip()
  54                                 if pathType != "CUSTOM":
  55                                         startCodeDone = True
  56
  57                         if ';' in line:
  58                                 #Slic3r GCode comment parser
  59                                 comment = line[line.find(';')+1:].strip()
  60                                 if comment == 'fill':
  61                                         pathType = 'FILL'
  62                                 elif comment == 'perimeter':
  63                                         pathType = 'WALL-INNER'
  64                                 elif comment == 'skirt':
  65                                         pathType = 'SKIRT'
  66                                 if pathType != "CUSTOM":
  67                                         startCodeDone = True
  68                                 line = line[0:line.find(';')]
  69
  70                         G = self.getCodeInt(line, 'G')
  71                         if G is not None:
  72                                 if G == 0 or G == 1:    #Move
  73                                         x = self.getCodeFloat(line, 'X')
  74                                         y = self.getCodeFloat(line, 'Y')
  75                                         z = self.getCodeFloat(line, 'Z')
  76                                         e = self.getCodeFloat(line, 'E')
  77                                         f = self.getCodeFloat(line, 'F')
  78                                         oldPos = pos.copy()
  79                                         if x is not None:
  80                                                 if posAbs:
  81                                                         pos.x = x * scale
  82                                                 else:
  83                                                         pos.x += x * scale
  84                                         if y is not None:
  85                                                 if posAbs:
  86                                                         pos.y = y * scale
  87                                                 else:
  88                                                         pos.y += y * scale
  89                                         if z is not None:
  90                                                 if posAbs:
  91                                                         pos.z = z * scale
  92                                                 else:
  93                                                         pos.z += z * scale
  94                                                 if oldPos.z != pos.z and startCodeDone:
  95                                                         layerNr += 1
  96                                         if f is not None:
  97                                                 feedRate = f
  98                                         if x is not None or y is not None or z is not None:
  99                                                 totalMoveTimeMinute += (oldPos - pos).vsize() / feedRate
 100                                         moveType = 'move'
 101                                         if e is not None:
 102                                                 if posAbs:
 103                                                         if e > currentE:
 104                                                                 moveType = 'extrude'
 105                                                         if e < currentE:
 106                                                                 moveType = 'retract'
 107                                                         totalExtrusion += e - currentE
 108                                                         currentE = e
 109                                                 else:
 110                                                         if e > 0:
 111                                                                 moveType = 'extrude'
 112                                                         if e < 0:
 113                                                                 moveType = 'retract'
 114                                                         totalExtrusion += e
 115                                                         currentE += e
 116                                                 if totalExtrusion > maxExtrusion:
 117                                                         maxExtrusion = totalExtrusion
 118                                         if currentPath.type != moveType or currentPath.pathType != pathType:
 119                                                 currentPath = gcodePath(moveType, pathType, layerNr, currentPath.list[-1])
 120                                                 pathList.append(currentPath)
 121                                         newPos = pos.copy()
 122                                         newPos.e = totalExtrusion
 123                                         currentPath.list.append(newPos)
 124                                 elif G == 20:   #Units are inches
 125                                         scale = 25.4
 126                                 elif G == 21:   #Units are mm
 127                                         scale = 1.0
 128                                 elif G == 28:   #Home
 129                                         x = self.getCodeFloat(line, 'X')
 130                                         y = self.getCodeFloat(line, 'Y')
 131                                         z = self.getCodeFloat(line, 'Z')
 132                                         if x is None and y is None and z is None:
 133                                                 pos = util3d.Vector3()
 134                                         else:
 135                                                 if x is not None:
 136                                                         pos.x = 0.0
 137                                                 if y is not None:
 138                                                         pos.y = 0.0
 139                                                 if z is not None:
 140                                                         pos.z = 0.0
 141                                 elif G == 90:   #Absolute position
 142                                         posAbs = True
 143                                 elif G == 91:   #Relative position
 144                                         posAbs = False
 145                                 elif G == 92:
 146                                         x = self.getCodeFloat(line, 'X')
 147                                         y = self.getCodeFloat(line, 'Y')
 148                                         z = self.getCodeFloat(line, 'Z')
 149                                         e = self.getCodeFloat(line, 'E')
 150                                         if e is not None:
 151                                                 currentE = e
 152                                         if x is not None:
 153                                                 posOffset.x = pos.x + x
 154                                         if y is not None:
 155                                                 posOffset.y = pos.y + y
 156                                         if z is not None:
 157                                                 posOffset.z = pos.z + z
 158                                 else:
 159                                         print "Unknown G code:" + str(G)
 160                         else:
 161                                 M = self.getCodeInt(line, 'M')
 162                                 if M is not None:
 163                                         if M == 1:      #Message with possible wait (ignored)
 164                                                 pass
 165                                         elif M == 84:   #Disable step drivers
 166                                                 pass
 167                                         elif M == 92:   #Set steps per unit
 168                                                 pass
 169                                         elif M == 104:  #Set temperature, no wait
 170                                                 pass
 171                                         elif M == 105:  #Get temperature
 172                                                 pass
 173                                         elif M == 106:  #Enable fan
 174                                                 pass
 175                                         elif M == 107:  #Disable fan
 176                                                 pass
 177                                         elif M == 108:  #Extruder RPM (these should not be in the final GCode, but they are)
 178                                                 pass
 179                                         elif M == 109:  #Set temperature, wait
 180                                                 pass
 181                                         elif M == 113:  #Extruder PWM (these should not be in the final GCode, but they are)
 182                                                 pass
 183                                         else:
 184                                                 print "Unknown M code:" + str(M)
 185                 gcodeFile.close()
 186                 self.layerCount = layerNr
 187                 self.pathList = pathList
 188                 self.extrusionAmount = maxExtrusion
 189                 self.totalMoveTimeMinute = totalMoveTimeMinute
 190                 print "Extruded a total of: %d mm of filament" % (self.extrusionAmount)
 191                 print "Estimated print duration: %.2f minutes" % (self.totalMoveTimeMinute)
 192
 193         def getCodeInt(self, line, code):
 194                 if code not in self.regMatch:
 195                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 196                 m = self.regMatch[code].search(line)
 197                 if m == None:
 198                         return None
 199                 try:
 200                         return int(m.group(1))
 201                 except:
 202                         return None
 203
 204         def getCodeFloat(self, line, code):
 205                 if code not in self.regMatch:
 206                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 207                 m = self.regMatch[code].search(line)
 208                 if m == None:
 209                         return None
 210                 try:
 211                         return float(m.group(1))
 212                 except:
 213                         return None
 214
 215 if __name__ == '__main__':
 216         for filename in sys.argv[1:]:
 217                 gcode().load(filename)
 218