Adding Slic3r preprocessor.

Resources/Slic3r-plugin/TinyG2.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+import re
+import sys
+import argparse
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--eto', nargs=1, default='A')
+    parser.add_argument('filenames', nargs='+')
+    args = parser.parse_args()
+    return args
+
+def process(filename, eto):
+  with open(filename, "r") as f:
+    lines = f.readlines()
+
+  with open(filename, "w") as f:
+    for line in lines:
+      line_split = list(line.partition(";"))
+
+      # Fix E to A or B
+      line_split[0] = re.sub(r"^([^;\(\)]+)[Ee]([-.0-9]+)", "\\1"+eto+"\\2", line_split[0])
+
+      # Fix assinine G0 F...
+      line_split[0] = re.sub(r"^[Gg]0 *(.*?)([Ff][-.0-9]+ *)(.*)$", "G0 \\1\\3", line_split[0])
+
+      # Retraction should be using G0, not G1 with a feedrate
+      match = re.search(r"^[Gg]1 *((?:[FfAaBb][-.0-9]+ *?)+)( *;.*)?$", line_split[0])
+      if (match != None):
+        tail = match.group(2)
+        if (tail == None):
+          tail = ""
+        new_line = ["G0"]
+        for option in re.findall(r"([FfAaBb])([-.0-9]+) *", match.group(1)):
+          if option[0] in ['a', 'A', 'b', 'B']:
+            new_line.append("".join(option))
+        line_split[0] = " ".join(new_line) + tail + "\n"
+
+      # G92 -> G28.3
+      line_split[0] = re.sub(r"^[Gg]92([^0-9.].*)$", "G28.3\\1", line_split[0])
+
+      # Disable fan controls
+      line_split[0] = re.sub(r"([Mm]107)\b", ";\\1", line_split[0])
+
+      # Disable temperature controls
+      line_split[0] = re.sub(r"([Mm]10[469])\b", ";\\1", line_split[0])
+
+      # Remove errant T[01]s
+      line_split[0] = re.sub(r"^([Tt][01])\b", ";\\1", line_split[0])
+
+      line = "".join(line_split)
+      f.write(line)
+
+
+def main(argv):
+  args = parse_args()
+
+  for filename in args.filenames:
+    process(filename, args.eto)
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))