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 calculateCost(self):
  42                 cost_kg = float(profile.getPreference('filament_cost_kg'))
  43                 cost_meter = float(profile.getPreference('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                 totalMoveTimeMinute = 0.0
  60                 scale = 1.0
  61                 posAbs = True
  62                 feedRate = 3600
  63                 pathType = 'CUSTOM';
  64                 startCodeDone = False
  65                 currentLayer = []
  66                 currentPath = gcodePath('move', pathType, pos.copy())
  67                 currentPath.list[0].e = totalExtrusion
  68                 currentLayer.append(currentPath)
  69                 for line in gcodeFile:
  70                         if self.progressCallback != None:
  71                                 if filePos != gcodeFile.tell():
  72                                         filePos = gcodeFile.tell()
  73                                         self.progressCallback(float(filePos) / float(self._fileSize))
  74
  75                         #Parse Cura_SF comments
  76                         if line.startswith(';TYPE:'):
  77                                 pathType = line[6:].strip()
  78                                 if pathType != "CUSTOM":
  79                                         startCodeDone = True
  80
  81                         if ';' in line:
  82                                 #Slic3r GCode comment parser
  83                                 comment = line[line.find(';')+1:].strip()
  84                                 if comment == 'fill':
  85                                         pathType = 'FILL'
  86                                 elif comment == 'perimeter':
  87                                         pathType = 'WALL-INNER'
  88                                 elif comment == 'skirt':
  89                                         pathType = 'SKIRT'
  90                                 if pathType != "CUSTOM":
  91                                         startCodeDone = True
  92                                 line = line[0:line.find(';')]
  93
  94                         G = self.getCodeInt(line, 'G')
  95                         if G is not None:
  96                                 if G == 0 or G == 1:    #Move
  97                                         x = self.getCodeFloat(line, 'X')
  98                                         y = self.getCodeFloat(line, 'Y')
  99                                         z = self.getCodeFloat(line, 'Z')
 100                                         e = self.getCodeFloat(line, 'E')
 101                                         f = self.getCodeFloat(line, 'F')
 102                                         oldPos = pos.copy()
 103                                         if x is not None:
 104                                                 if posAbs:
 105                                                         pos.x = x * scale
 106                                                 else:
 107                                                         pos.x += x * scale
 108                                         if y is not None:
 109                                                 if posAbs:
 110                                                         pos.y = y * scale
 111                                                 else:
 112                                                         pos.y += y * scale
 113                                         if z is not None:
 114                                                 if posAbs:
 115                                                         pos.z = z * scale
 116                                                 else:
 117                                                         pos.z += z * scale
 118                                                 #Check if we have a new layer.
 119                                                 if oldPos.z < pos.z and startCodeDone and len(currentLayer) > 0:
 120                                                         self.layerList.append(currentLayer)
 121                                                         currentLayer = []
 122                                         if f is not None:
 123                                                 feedRate = f
 124                                         if x is not None or y is not None or z is not None:
 125                                                 totalMoveTimeMinute += (oldPos - pos).vsize() / feedRate
 126                                         moveType = 'move'
 127                                         if e is not None:
 128                                                 if posAbs:
 129                                                         if e > currentE:
 130                                                                 moveType = 'extrude'
 131                                                         if e < currentE:
 132                                                                 moveType = 'retract'
 133                                                         totalExtrusion += e - currentE
 134                                                         currentE = e
 135                                                 else:
 136                                                         if e > 0:
 137                                                                 moveType = 'extrude'
 138                                                         if e < 0:
 139                                                                 moveType = 'retract'
 140                                                         totalExtrusion += e
 141                                                         currentE += e
 142                                                 if totalExtrusion > maxExtrusion:
 143                                                         maxExtrusion = totalExtrusion
 144                                         if currentPath.type != moveType or currentPath.pathType != pathType:
 145                                                 currentPath = gcodePath(moveType, pathType, currentPath.list[-1])
 146                                                 currentLayer.append(currentPath)
 147                                         newPos = pos.copy()
 148                                         newPos.e = totalExtrusion
 149                                         currentPath.list.append(newPos)
 150                                 elif G == 20:   #Units are inches
 151                                         scale = 25.4
 152                                 elif G == 21:   #Units are mm
 153                                         scale = 1.0
 154                                 elif G == 28:   #Home
 155                                         x = self.getCodeFloat(line, 'X')
 156                                         y = self.getCodeFloat(line, 'Y')
 157                                         z = self.getCodeFloat(line, 'Z')
 158                                         if x is None and y is None and z is None:
 159                                                 pos = util3d.Vector3()
 160                                         else:
 161                                                 if x is not None:
 162                                                         pos.x = 0.0
 163                                                 if y is not None:
 164                                                         pos.y = 0.0
 165                                                 if z is not None:
 166                                                         pos.z = 0.0
 167                                 elif G == 90:   #Absolute position
 168                                         posAbs = True
 169                                 elif G == 91:   #Relative position
 170                                         posAbs = False
 171                                 elif G == 92:
 172                                         x = self.getCodeFloat(line, 'X')
 173                                         y = self.getCodeFloat(line, 'Y')
 174                                         z = self.getCodeFloat(line, 'Z')
 175                                         e = self.getCodeFloat(line, 'E')
 176                                         if e is not None:
 177                                                 currentE = e
 178                                         if x is not None:
 179                                                 posOffset.x = pos.x + x
 180                                         if y is not None:
 181                                                 posOffset.y = pos.y + y
 182                                         if z is not None:
 183                                                 posOffset.z = pos.z + z
 184                                 else:
 185                                         print "Unknown G code:" + str(G)
 186                         else:
 187                                 M = self.getCodeInt(line, 'M')
 188                                 if M is not None:
 189                                         if M == 1:      #Message with possible wait (ignored)
 190                                                 pass
 191                                         elif M == 84:   #Disable step drivers
 192                                                 pass
 193                                         elif M == 92:   #Set steps per unit
 194                                                 pass
 195                                         elif M == 104:  #Set temperature, no wait
 196                                                 pass
 197                                         elif M == 105:  #Get temperature
 198                                                 pass
 199                                         elif M == 106:  #Enable fan
 200                                                 pass
 201                                         elif M == 107:  #Disable fan
 202                                                 pass
 203                                         elif M == 108:  #Extruder RPM (these should not be in the final GCode, but they are)
 204                                                 pass
 205                                         elif M == 109:  #Set temperature, wait
 206                                                 pass
 207                                         elif M == 113:  #Extruder PWM (these should not be in the final GCode, but they are)
 208                                                 pass
 209                                         else:
 210                                                 print "Unknown M code:" + str(M)
 211                 self.layerList.append(currentLayer)
 212                 self.extrusionAmount = maxExtrusion
 213                 self.totalMoveTimeMinute = totalMoveTimeMinute
 214                 #print "Extruded a total of: %d mm of filament" % (self.extrusionAmount)
 215                 #print "Estimated print duration: %.2f minutes" % (self.totalMoveTimeMinute)
 216
 217         def getCodeInt(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 int(m.group(1))
 225                 except:
 226                         return None
 227
 228         def getCodeFloat(self, line, code):
 229                 if code not in self.regMatch:
 230                         self.regMatch[code] = re.compile(code + '([^\s]+)')
 231                 m = self.regMatch[code].search(line)
 232                 if m == None:
 233                         return None
 234                 try:
 235                         return float(m.group(1))
 236                 except:
 237                         return None
 238
 239 if __name__ == '__main__':
 240         for filename in sys.argv[1:]:
 241                 gcode().load(filename)
 242