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 from util import profile
  11
  12 class gcodePath():
  13         def __init__(self, newType, pathType, startPoint):
  14                 self.type = newType
  15                 self.pathType = pathType
  16                 self.list = [startPoint]
  17
  18 class gcode():
  19         def __init__(self):
  20                 self.regMatch = {}
  21                 self.layerList = []
  22                 self.extrusionAmount = 0
  23                 self.totalMoveTimeMinute = 0
  24                 self.progressCallback = None
  25
  26         def load(self, filename):
  27                 self._fileSize = os.stat(filename).st_size
  28                 gcodeFile = open(filename, 'r')
  29                 self._load(gcodeFile)
  30                 gcodeFile.close()
  31
  32         def loadList(self, l):
  33                 self._load(l)
  34
  35         def calculateWeight(self):
  36                 #Calculates the weight of the filament in kg
  37                 radius = float(profile.getProfileSetting('filament_diameter')) / 2
  38                 volumeM3 = (self.extrusionAmount * (math.pi * radius * radius)) / (1000*1000*1000)
  39                 return volumeM3 * float(profile.getPreference('filament_density'))
  40
  41         def _load(self, gcodeFile):
  42                 filePos = 0
  43                 pos = util3d.Vector3()
  44                 posOffset = util3d.Vector3()
  45                 currentE = 0.0
  46                 totalExtrusion = 0.0
  47                 maxExtrusion = 0.0
  48                 totalMoveTimeMinute = 0.0
  49                 scale = 1.0
  50                 posAbs = True
  51                 feedRate = 3600
  52                 pathType = 'CUSTOM';
  53                 startCodeDone = False
  54                 currentLayer = []
  55                 currentPath = gcodePath('move', pathType, pos.copy())
  56                 currentPath.list[0].e = totalExtrusion
  57                 currentLayer.append(currentPath)
  58                 for line in gcodeFile:
  59                         if self.progressCallback != None:
  60                                 if filePos != gcodeFile.tell():
  61                                         filePos = gcodeFile.tell()
  62                                         self.progressCallback(float(filePos) / float(self._fileSize))
  63
  64                         #Parse Cura_SF comments
  65                         if line.startswith(';TYPE:'):
  66                                 pathType = line[6:].strip()
  67                                 if pathType != "CUSTOM":
  68                                         startCodeDone = True
  69
  70                         if ';' in line:
  71                                 #Slic3r GCode comment parser
  72                                 comment = line[line.find(';')+1:].strip()
  73                                 if comment == 'fill':
  74                                         pathType = 'FILL'
  75                                 elif comment == 'perimeter':
  76                                         pathType = 'WALL-INNER'
  77                                 elif comment == 'skirt':
  78                                         pathType = 'SKIRT'
  79                                 if pathType != "CUSTOM":
  80                                         startCodeDone = True
  81                                 line = line[0:line.find(';')]
  82
  83                         G = self.getCodeInt(line, 'G')
  84                         if G is not None:
  85                                 if G == 0 or G == 1:    #Move
  86                                         x = self.getCodeFloat(line, 'X')
  87                                         y = self.getCodeFloat(line, 'Y')
  88                                         z = self.getCodeFloat(line, 'Z')
  89                                         e = self.getCodeFloat(line, 'E')
  90                                         f = self.getCodeFloat(line, 'F')
  91                                         oldPos = pos.copy()
  92                                         if x is not None:
  93                                                 if posAbs:
  94                                                         pos.x = x * scale
  95                                                 else:
  96                                                         pos.x += x * scale
  97                                         if y is not None:
  98                                                 if posAbs:
  99                                                         pos.y = y * scale
 100                                                 else:
 101                                                         pos.y += y * scale
 102                                         if z is not None:
 103                                                 if posAbs:
 104                                                         pos.z = z * scale
 105                                                 else:
 106                                                         pos.z += z * scale
 107                                                 #Check if we have a new layer.
 108                                                 if oldPos.z != pos.z and startCodeDone:
 109                                                         self.layerList.append(currentLayer)
 110                                                         currentLayer = []
 111                                         if f is not None:
 112                                                 feedRate = f
 113                                         if x is not None or y is not None or z is not None:
 114                                                 totalMoveTimeMinute += (oldPos - pos).vsize() / feedRate
 115                                         moveType = 'move'
 116                                         if e is not None:
 117                                                 if posAbs:
 118                                                         if e > currentE:
 119                                                                 moveType = 'extrude'
 120                                                         if e < currentE:
 121                                                                 moveType = 'retract'
 122                                                         totalExtrusion += e - currentE
 123                                                         currentE = e
 124                                                 else:
 125                                                         if e > 0:
 126                                                                 moveType = 'extrude'
 127                                                         if e < 0:
 128                                                                 moveType = 'retract'
 129                                                         totalExtrusion += e
 130                                                         currentE += e
 131                                                 if totalExtrusion > maxExtrusion:
 132                                                         maxExtrusion = totalExtrusion
 133                                         if currentPath.type != moveType or currentPath.pathType != pathType:
 134                                                 currentPath = gcodePath(moveType, pathType, currentPath.list[-1])
 135                                                 currentLayer.append(currentPath)
 136                                         newPos = pos.copy()
 137                                         newPos.e = totalExtrusion
 138                                         currentPath.list.append(newPos)
 139                                 elif G == 20:   #Units are inches
 140                                         scale = 25.4
 141                                 elif G == 21:   #Units are mm
 142                                         scale = 1.0
 143                                 elif G == 28:   #Home
 144                                         x = self.getCodeFloat(line, 'X')
 145                                         y = self.getCodeFloat(line, 'Y')
 146                                         z = self.getCodeFloat(line, 'Z')
 147                                         if x is None and y is None and z is None:
 148                                                 pos = util3d.Vector3()
 149                                         else:
 150                                                 if x is not None:
 151                                                         pos.x = 0.0
 152                                                 if y is not None:
 153                                                         pos.y = 0.0
 154                                                 if z is not None:
 155                                                         pos.z = 0.0
 156                                 elif G == 90:   #Absolute position
 157                                         posAbs = True
 158                                 elif G == 91:   #Relative position
 159                                         posAbs = False
 160                                 elif G == 92:
 161                                         x = self.getCodeFloat(line, 'X')
 162                                         y = self.getCodeFloat(line, 'Y')
 163                                         z = self.getCodeFloat(line, 'Z')
 164                                         e = self.getCodeFloat(line, 'E')
 165                                         if e is not None:
 166                                                 currentE = e
 167                                         if x is not None:
 168                                                 posOffset.x = pos.x + x
 169                                         if y is not None:
 170                                                 posOffset.y = pos.y + y
 171                                         if z is not None:
 172                                                 posOffset.z = pos.z + z
 173                                 else:
 174                                         print "Unknown G code:" + str(G)
 175                         else:
 176                                 M = self.getCodeInt(line, 'M')
 177                                 if M is not None:
 178                                         if M == 1:      #Message with possible wait (ignored)
 179                                                 pass
 180                                         elif M == 84:   #Disable step drivers
 181                                                 pass
 182                                         elif M == 92:   #Set steps per unit
 183                                                 pass
 184                                         elif M == 104:  #Set temperature, no wait
 185                                                 pass
 186                                         elif M == 105:  #Get temperature
 187                                                 pass
 188                                         elif M == 106:  #Enable fan
 189                                                 pass
 190                                         elif M == 107:  #Disable fan
 191                                                 pass
 192                                         elif M == 108:  #Extruder RPM (these should not be in the final GCode, but they are)
 193                                                 pass
 194                                         elif M == 109:  #Set temperature, wait
 195                                                 pass
 196                                         elif M == 113:  #Extruder PWM (these should not be in the final GCode, but they are)
 197                                                 pass
 198                                         else:
 199                                                 print "Unknown M code:" + str(M)
 200                 self.layerList.append(currentLayer)
 201                 self.extrusionAmount = maxExtrusion
 202                 self.totalMoveTimeMinute = totalMoveTimeMinute
 203                 print "Extruded a total of: %d mm of filament" % (self.extrusionAmount)
 204                 print "Estimated print duration: %.2f minutes" % (self.totalMoveTimeMinute)
 205
 206         def getCodeInt(self, line, code):
 207                 if code not in self.regMatch:
 208                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 209                 m = self.regMatch[code].search(line)
 210                 if m == None:
 211                         return None
 212                 try:
 213                         return int(m.group(1))
 214                 except:
 215                         return None
 216
 217         def getCodeFloat(self, line, code):
 218                 if code not in self.regMatch:
 219                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 220                 m = self.regMatch[code].search(line)
 221                 if m == None:
 222                         return None
 223                 try:
 224                         return float(m.group(1))
 225                 except:
 226                         return None
 227
 228 if __name__ == '__main__':
 229         for filename in sys.argv[1:]:
 230                 gcode().load(filename)
 231