Adding new macro to send individual parts to the slicer

Conversion/3dPrinterSlicerIndividualParts.FCMacro

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+# This code, when run, will export the visible bodies at the top level (bodies deeper in the tree will be ignored) 
+# of the currently open design to individual STL files, and open them it in the slicing software that you use. 
+# This macro will look for Cura as the default but you can change it to any other slider by changing the 
+# SLICERAPP variable in the source code.
+
+# It is best used by creating a link to the macro on the toolbar, and when your ready to slice the object, 
+# just click it and your objects, as they appear on the screen in FreeCAD will appear on your slicing software's 
+# interface, ready to slice. It will also create several STL files with the same filename as the design file and 
+# the part label in the same directory as the design file. 
+
+__Name__ = '3d Printer Slicer Individual Parts'
+__Comment__ = 'Exports each visible body indiviually and sends the parts to the slicer'
+__Author__ = 'wayofwood,cae2100'
+__Version__ = '1.0'
+__Date__ = '2020-11-10'
+__License__ = 'LGPL-2.0-or-later'
+__Web__ = 'https://wiki.freecadweb.org/Macro_3d_Printer_Slicer_Individual_Parts'
+__Wiki__ = 'https://wiki.freecadweb.org/Macro_3d_Printer_Slicer_Individual_Parts'
+__Icon__ = '3d_Printer_Slicer.FCMacro.svg'
+__Help__ = 'If you want to use a different slicer than cura please change the SLICERAPP variable in the source code'
+__Status__ = 'Alpha'
+__Requires__ = 'no limitations known'
+__Communication__ = 'https://forum.freecadweb.org/viewtopic.php?f=22&t=51867&p=445679#p445679'
+__Files__ = '3d_Printer_Slicer.FCMacro.svg'
+
+
+import FreeCAD
+import Mesh
+import sys
+import math
+import os
+import subprocess
+
+SLICERAPP= "cura"		 			# Put your Slicer program here
+
+# some fuctions
+def getPlacement(quat,vect,obj):
+  if quat[3] > -1  and quat[3] < 1:
+    delta = math.acos(quat[3])*2.0
+    scale = math.sin(delta/2)
+    rx = quat[0]/scale
+    ry = quat[1]/scale
+    rz = quat[2]/scale
+  else:
+    delta = 0
+    rx = 0
+    ry = 0
+    rz = 1
+  info0 = "translation "+str(vect.x)+" "+str(vect.y)+" "+str(vect.z)
+  info1 = "rotation "+str(rx)+" "+str(ry)+" "+str(rz)+" "+str(delta)
+  return info0+" "+info1
+# some definitions
+placement = App.Placement(App.Vector(0,0,0),App.Rotation(0,0,0,1))
+# user need to set this directory where slicing software is located
+OutDir = FreeCAD.ActiveDocument.FileName.replace(".FCStd", "--")
+visible_objs = []
+# Get Objects in document
+doc = App.ActiveDocument
+objs = doc.Objects
+stlFile = ""
+stlFiles = [ SLICERAPP ]
+# hide all
+for obj in objs:
+   #print(obj.Label + "//" + obj.TypeId)
+   #print(len(obj.InList))
+   if obj.ViewObject.isVisible() and hasattr(obj, 'Shape') and (len(obj.InList) <= 1):
+      visible_objs.append(obj)
+for obj in visible_objs:
+  stlFile = OutDir+str(obj.Label)+".stl"
+  Mesh.export([obj],stlFile)
+  stlFiles.append(stlFile)
+  print ("Exporting " + stlFile + "\n")
+print ("Calling subprocess: " + str(stlFiles)+"\n")
+subprocess.Popen(stlFiles)
+