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(object):
  13         def __init__(self, newType, pathType, startPoint):
  14                 self.type = newType
  15                 self.pathType = pathType
  16                 self.list = [startPoint]
  17
  18 class gcode(object):
  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 * profile.getPreferenceFloat('filament_density')
  40
  41         def calculateCost(self):
  42                 cost_kg = profile.getPreferenceFloat('filament_cost_kg')
  43                 cost_meter = profile.getPreferenceFloat('filament_cost_meter')
  44                 if cost_kg > 0.0 and cost_meter > 0.0:
  45                         return "%.2f / %.2f" % (self.calculateWeight() * cost_kg, self.extrusionAmount / 1000 * cost_meter)
  46                 elif cost_kg > 0.0:
  47                         return "%.2f" % (self.calculateWeight() * cost_kg)
  48                 elif cost_meter > 0.0:
  49                         return "%.2f" % (self.extrusionAmount / 1000 * cost_meter)
  50                 return False
  51
  52         def _load(self, gcodeFile):
  53                 filePos = 0
  54                 pos = util3d.Vector3()
  55                 posOffset = util3d.Vector3()
  56                 currentE = 0.0
  57                 totalExtrusion = 0.0
  58                 maxExtrusion = 0.0
  59                 currentExtruder = 0
  60                 totalMoveTimeMinute = 0.0
  61                 scale = 1.0
  62                 posAbs = True
  63                 feedRate = 3600
  64                 pathType = 'CUSTOM';
  65                 startCodeDone = False
  66                 currentLayer = []
  67                 currentPath = gcodePath('move', pathType, 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 pathType != "CUSTOM":
  92                                         startCodeDone = True
  93                                 line = line[0:line.find(';')]
  94                         T = self.getCodeInt(line, 'T')
  95                         if T is not None:
  96                                 if currentExtruder > 0:
  97                                         posOffset.x -= profile.getPreferenceFloat('extruder_offset_x%d' % (currentExtruder))
  98                                         posOffset.y -= profile.getPreferenceFloat('extruder_offset_y%d' % (currentExtruder))
  99                                 currentExtruder = T
 100                                 if currentExtruder > 0:
 101                                         posOffset.x += profile.getPreferenceFloat('extruder_offset_x%d' % (currentExtruder))
 102                                         posOffset.y += profile.getPreferenceFloat('extruder_offset_y%d' % (currentExtruder))
 103
 104                         G = self.getCodeInt(line, 'G')
 105                         if G is not None:
 106                                 if G == 0 or G == 1:    #Move
 107                                         x = self.getCodeFloat(line, 'X')
 108                                         y = self.getCodeFloat(line, 'Y')
 109                                         z = self.getCodeFloat(line, 'Z')
 110                                         e = self.getCodeFloat(line, 'E')
 111                                         f = self.getCodeFloat(line, 'F')
 112                                         oldPos = pos.copy()
 113                                         if x is not None:
 114                                                 if posAbs:
 115                                                         pos.x = x * scale + posOffset.x
 116                                                 else:
 117                                                         pos.x += x * scale
 118                                         if y is not None:
 119                                                 if posAbs:
 120                                                         pos.y = y * scale + posOffset.y
 121                                                 else:
 122                                                         pos.y += y * scale
 123                                         if z is not None:
 124                                                 if posAbs:
 125                                                         pos.z = z * scale + posOffset.z
 126                                                 else:
 127                                                         pos.z += z * scale
 128                                                 #Check if we have a new layer.
 129                                                 if oldPos.z < pos.z and startCodeDone and len(currentLayer) > 0:
 130                                                         self.layerList.append(currentLayer)
 131                                                         currentLayer = []
 132                                         if f is not None:
 133                                                 feedRate = f
 134                                         if x is not None or y is not None or z is not None:
 135                                                 totalMoveTimeMinute += (oldPos - pos).vsize() / feedRate
 136                                         moveType = 'move'
 137                                         if e is not None:
 138                                                 if posAbs:
 139                                                         if e > currentE:
 140                                                                 moveType = 'extrude'
 141                                                         if e < currentE:
 142                                                                 moveType = 'retract'
 143                                                         totalExtrusion += e - currentE
 144                                                         currentE = e
 145                                                 else:
 146                                                         if e > 0:
 147                                                                 moveType = 'extrude'
 148                                                         if e < 0:
 149                                                                 moveType = 'retract'
 150                                                         totalExtrusion += e
 151                                                         currentE += e
 152                                                 if totalExtrusion > maxExtrusion:
 153                                                         maxExtrusion = totalExtrusion
 154                                         if currentPath.type != moveType or currentPath.pathType != pathType:
 155                                                 currentPath = gcodePath(moveType, pathType, currentPath.list[-1])
 156                                                 currentLayer.append(currentPath)
 157                                         newPos = pos.copy()
 158                                         newPos.e = totalExtrusion
 159                                         currentPath.list.append(newPos)
 160                                 elif G == 20:   #Units are inches
 161                                         scale = 25.4
 162                                 elif G == 21:   #Units are mm
 163                                         scale = 1.0
 164                                 elif G == 28:   #Home
 165                                         x = self.getCodeFloat(line, 'X')
 166                                         y = self.getCodeFloat(line, 'Y')
 167                                         z = self.getCodeFloat(line, 'Z')
 168                                         if x is None and y is None and z is None:
 169                                                 pos = util3d.Vector3()
 170                                         else:
 171                                                 if x is not None:
 172                                                         pos.x = 0.0
 173                                                 if y is not None:
 174                                                         pos.y = 0.0
 175                                                 if z is not None:
 176                                                         pos.z = 0.0
 177                                 elif G == 90:   #Absolute position
 178                                         posAbs = True
 179                                 elif G == 91:   #Relative position
 180                                         posAbs = False
 181                                 elif G == 92:
 182                                         x = self.getCodeFloat(line, 'X')
 183                                         y = self.getCodeFloat(line, 'Y')
 184                                         z = self.getCodeFloat(line, 'Z')
 185                                         e = self.getCodeFloat(line, 'E')
 186                                         if e is not None:
 187                                                 currentE = e
 188                                         if x is not None:
 189                                                 posOffset.x = pos.x + x
 190                                         if y is not None:
 191                                                 posOffset.y = pos.y + y
 192                                         if z is not None:
 193                                                 posOffset.z = pos.z + z
 194                                 else:
 195                                         print "Unknown G code:" + str(G)
 196                         else:
 197                                 M = self.getCodeInt(line, 'M')
 198                                 if M is not None:
 199                                         if M == 1:      #Message with possible wait (ignored)
 200                                                 pass
 201                                         elif M == 84:   #Disable step drivers
 202                                                 pass
 203                                         elif M == 92:   #Set steps per unit
 204                                                 pass
 205                                         elif M == 104:  #Set temperature, no wait
 206                                                 pass
 207                                         elif M == 105:  #Get temperature
 208                                                 pass
 209                                         elif M == 106:  #Enable fan
 210                                                 pass
 211                                         elif M == 107:  #Disable fan
 212                                                 pass
 213                                         elif M == 108:  #Extruder RPM (these should not be in the final GCode, but they are)
 214                                                 pass
 215                                         elif M == 109:  #Set temperature, wait
 216                                                 pass
 217                                         elif M == 113:  #Extruder PWM (these should not be in the final GCode, but they are)
 218                                                 pass
 219                                         else:
 220                                                 print "Unknown M code:" + str(M)
 221                 self.layerList.append(currentLayer)
 222                 self.extrusionAmount = maxExtrusion
 223                 self.totalMoveTimeMinute = totalMoveTimeMinute
 224                 #print "Extruded a total of: %d mm of filament" % (self.extrusionAmount)
 225                 #print "Estimated print duration: %.2f minutes" % (self.totalMoveTimeMinute)
 226
 227         def getCodeInt(self, line, code):
 228                 if code not in self.regMatch:
 229                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 230                 m = self.regMatch[code].search(line)
 231                 if m == None:
 232                         return None
 233                 try:
 234                         return int(m.group(1))
 235                 except:
 236                         return None
 237
 238         def getCodeFloat(self, line, code):
 239                 if code not in self.regMatch:
 240                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 241                 m = self.regMatch[code].search(line)
 242                 if m == None:
 243                         return None
 244                 try:
 245                         return float(m.group(1))
 246                 except:
 247                         return None
 248
 249 if __name__ == '__main__':
 250         for filename in sys.argv[1:]:
 251                 gcode().load(filename)
 252