Cura/util/gcodeInterpreter.py

   1 import sys
   2 import math
   3 import re
   4 import os
   5
   6 import util3d
   7 import profile
   8
   9 class gcodePath(object):
  10         def __init__(self, newType, pathType, layerThickness, startPoint):
  11                 self.type = newType
  12                 self.pathType = pathType
  13                 self.layerThickness = layerThickness
  14                 self.list = [startPoint]
  15
  16 class gcode(object):
  17         def __init__(self):
  18                 self.regMatch = {}
  19                 self.layerList = []
  20                 self.extrusionAmount = 0
  21                 self.totalMoveTimeMinute = 0
  22                 self.progressCallback = None
  23
  24         def load(self, filename):
  25                 if os.path.isfile(filename):
  26                         self._fileSize = os.stat(filename).st_size
  27                         gcodeFile = open(filename, 'r')
  28                         self._load(gcodeFile)
  29                         gcodeFile.close()
  30
  31         def loadList(self, l):
  32                 self._load(l)
  33
  34         def calculateWeight(self):
  35                 #Calculates the weight of the filament in kg
  36                 radius = float(profile.getProfileSetting('filament_diameter')) / 2
  37                 volumeM3 = (self.extrusionAmount * (math.pi * radius * radius)) / (1000*1000*1000)
  38                 return volumeM3 * profile.getPreferenceFloat('filament_density')
  39
  40         def calculateCost(self):
  41                 cost_kg = profile.getPreferenceFloat('filament_cost_kg')
  42                 cost_meter = profile.getPreferenceFloat('filament_cost_meter')
  43                 if cost_kg > 0.0 and cost_meter > 0.0:
  44                         return "%.2f / %.2f" % (self.calculateWeight() * cost_kg, self.extrusionAmount / 1000 * cost_meter)
  45                 elif cost_kg > 0.0:
  46                         return "%.2f" % (self.calculateWeight() * cost_kg)
  47                 elif cost_meter > 0.0:
  48                         return "%.2f" % (self.extrusionAmount / 1000 * cost_meter)
  49                 return False
  50
  51         def _load(self, gcodeFile):
  52                 filePos = 0
  53                 pos = util3d.Vector3()
  54                 posOffset = util3d.Vector3()
  55                 currentE = 0.0
  56                 totalExtrusion = 0.0
  57                 maxExtrusion = 0.0
  58                 currentExtruder = 0
  59                 totalMoveTimeMinute = 0.0
  60                 scale = 1.0
  61                 posAbs = True
  62                 feedRate = 3600
  63                 layerThickness = 0.1
  64                 pathType = 'CUSTOM';
  65                 startCodeDone = False
  66                 currentLayer = []
  67                 currentPath = gcodePath('move', pathType, layerThickness, pos.copy())
  68                 currentPath.list[0].e = totalExtrusion
  69                 currentLayer.append(currentPath)
  70                 for line in gcodeFile:
  71                         if self.progressCallback != None:
  72                                 if filePos != gcodeFile.tell():
  73                                         filePos = gcodeFile.tell()
  74                                         self.progressCallback(float(filePos) / float(self._fileSize))
  75
  76                         #Parse Cura_SF comments
  77                         if line.startswith(';TYPE:'):
  78                                 pathType = line[6:].strip()
  79                                 if pathType != "CUSTOM":
  80                                         startCodeDone = True
  81
  82                         if ';' in line:
  83                                 #Slic3r GCode comment parser
  84                                 comment = line[line.find(';')+1:].strip()
  85                                 if comment == 'fill':
  86                                         pathType = 'FILL'
  87                                 elif comment == 'perimeter':
  88                                         pathType = 'WALL-INNER'
  89                                 elif comment == 'skirt':
  90                                         pathType = 'SKIRT'
  91                                 if comment.startswith('LAYER:'):
  92                                         self.layerList.append(currentLayer)
  93                                         currentLayer = []
  94                                 if pathType != "CUSTOM":
  95                                         startCodeDone = True
  96                                 line = line[0:line.find(';')]
  97                         T = self.getCodeInt(line, 'T')
  98                         if T is not None:
  99                                 if currentExtruder > 0:
 100                                         posOffset.x -= profile.getPreferenceFloat('extruder_offset_x%d' % (currentExtruder))
 101                                         posOffset.y -= profile.getPreferenceFloat('extruder_offset_y%d' % (currentExtruder))
 102                                 currentExtruder = T
 103                                 if currentExtruder > 0:
 104                                         posOffset.x += profile.getPreferenceFloat('extruder_offset_x%d' % (currentExtruder))
 105                                         posOffset.y += profile.getPreferenceFloat('extruder_offset_y%d' % (currentExtruder))
 106
 107                         G = self.getCodeInt(line, 'G')
 108                         if G is not None:
 109                                 if G == 0 or G == 1:    #Move
 110                                         x = self.getCodeFloat(line, 'X')
 111                                         y = self.getCodeFloat(line, 'Y')
 112                                         z = self.getCodeFloat(line, 'Z')
 113                                         e = self.getCodeFloat(line, 'E')
 114                                         f = self.getCodeFloat(line, 'F')
 115                                         oldPos = pos.copy()
 116                                         if x is not None:
 117                                                 if posAbs:
 118                                                         pos.x = x * scale + posOffset.x
 119                                                 else:
 120                                                         pos.x += x * scale
 121                                         if y is not None:
 122                                                 if posAbs:
 123                                                         pos.y = y * scale + posOffset.y
 124                                                 else:
 125                                                         pos.y += y * scale
 126                                         if z is not None:
 127                                                 if posAbs:
 128                                                         pos.z = z * scale + posOffset.z
 129                                                 else:
 130                                                         pos.z += z * scale
 131                                         if f is not None:
 132                                                 feedRate = f
 133                                         if x is not None or y is not None or z is not None:
 134                                                 totalMoveTimeMinute += (oldPos - pos).vsize() / feedRate
 135                                         moveType = 'move'
 136                                         if e is not None:
 137                                                 if posAbs:
 138                                                         if e > currentE:
 139                                                                 moveType = 'extrude'
 140                                                         if e < currentE:
 141                                                                 moveType = 'retract'
 142                                                         totalExtrusion += e - currentE
 143                                                         currentE = e
 144                                                 else:
 145                                                         if e > 0:
 146                                                                 moveType = 'extrude'
 147                                                         if e < 0:
 148                                                                 moveType = 'retract'
 149                                                         totalExtrusion += e
 150                                                         currentE += e
 151                                                 if totalExtrusion > maxExtrusion:
 152                                                         maxExtrusion = totalExtrusion
 153                                         if moveType == 'move' and oldPos.z != pos.z:
 154                                                 layerThickness = abs(oldPos.z - pos.z)
 155                                         if currentPath.type != moveType or currentPath.pathType != pathType:
 156                                                 currentPath = gcodePath(moveType, pathType, layerThickness, currentPath.list[-1])
 157                                                 currentLayer.append(currentPath)
 158                                         newPos = pos.copy()
 159                                         newPos.e = totalExtrusion
 160                                         currentPath.list.append(newPos)
 161                                 elif G == 20:   #Units are inches
 162                                         scale = 25.4
 163                                 elif G == 21:   #Units are mm
 164                                         scale = 1.0
 165                                 elif G == 28:   #Home
 166                                         x = self.getCodeFloat(line, 'X')
 167                                         y = self.getCodeFloat(line, 'Y')
 168                                         z = self.getCodeFloat(line, 'Z')
 169                                         if x is None and y is None and z is None:
 170                                                 pos = util3d.Vector3()
 171                                         else:
 172                                                 if x is not None:
 173                                                         pos.x = 0.0
 174                                                 if y is not None:
 175                                                         pos.y = 0.0
 176                                                 if z is not None:
 177                                                         pos.z = 0.0
 178                                 elif G == 90:   #Absolute position
 179                                         posAbs = True
 180                                 elif G == 91:   #Relative position
 181                                         posAbs = False
 182                                 elif G == 92:
 183                                         x = self.getCodeFloat(line, 'X')
 184                                         y = self.getCodeFloat(line, 'Y')
 185                                         z = self.getCodeFloat(line, 'Z')
 186                                         e = self.getCodeFloat(line, 'E')
 187                                         if e is not None:
 188                                                 currentE = e
 189                                         if x is not None:
 190                                                 posOffset.x = pos.x + x
 191                                         if y is not None:
 192                                                 posOffset.y = pos.y + y
 193                                         if z is not None:
 194                                                 posOffset.z = pos.z + z
 195                                 else:
 196                                         print "Unknown G code:" + str(G)
 197                         else:
 198                                 M = self.getCodeInt(line, 'M')
 199                                 if M is not None:
 200                                         if M == 1:      #Message with possible wait (ignored)
 201                                                 pass
 202                                         elif M == 84:   #Disable step drivers
 203                                                 pass
 204                                         elif M == 92:   #Set steps per unit
 205                                                 pass
 206                                         elif M == 104:  #Set temperature, no wait
 207                                                 pass
 208                                         elif M == 105:  #Get temperature
 209                                                 pass
 210                                         elif M == 106:  #Enable fan
 211                                                 pass
 212                                         elif M == 107:  #Disable fan
 213                                                 pass
 214                                         elif M == 108:  #Extruder RPM (these should not be in the final GCode, but they are)
 215                                                 pass
 216                                         elif M == 109:  #Set temperature, wait
 217                                                 pass
 218                                         elif M == 110:  #Reset N counter
 219                                                 pass
 220                                         elif M == 113:  #Extruder PWM (these should not be in the final GCode, but they are)
 221                                                 pass
 222                                         else:
 223                                                 print "Unknown M code:" + str(M)
 224                 self.layerList.append(currentLayer)
 225                 self.extrusionAmount = maxExtrusion
 226                 self.totalMoveTimeMinute = totalMoveTimeMinute
 227                 #print "Extruded a total of: %d mm of filament" % (self.extrusionAmount)
 228                 #print "Estimated print duration: %.2f minutes" % (self.totalMoveTimeMinute)
 229
 230         def getCodeInt(self, line, code):
 231                 if code not in self.regMatch:
 232                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 233                 m = self.regMatch[code].search(line)
 234                 if m == None:
 235                         return None
 236                 try:
 237                         return int(m.group(1))
 238                 except:
 239                         return None
 240
 241         def getCodeFloat(self, line, code):
 242                 if code not in self.regMatch:
 243                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 244                 m = self.regMatch[code].search(line)
 245                 if m == None:
 246                         return None
 247                 try:
 248                         return float(m.group(1))
 249                 except:
 250                         return None
 251
 252 if __name__ == '__main__':
 253         for filename in sys.argv[1:]:
 254                 gcode().load(filename)
 255