Placement link: expose placement as Placement property

latticeArrayFromShape.py

@@ -197,6 +197,7 @@ def CreateLatticeArrayFromShape(name, nonArray = False):
     FreeCADGui.doCommand("f.Base = App.ActiveDocument."+sel[0].ObjectName)
     if nonArray:
         FreeCADGui.doCommand("f.WholeObject = True")
+        FreeCADGui.doCommand("f.SingleByDesign = True")
         FreeCADGui.doCommand("f.Label = 'Placement of ' + f.Base.Label")
     else:
         FreeCADGui.doCommand("f.Label = 'Array from ' + f.Base.Label")

latticeBaseFeature.py

@@ -31,6 +31,7 @@ import Part
 from latticeCommon import *
 import latticeCompoundExplorer as LCE
 import latticeMarkers
+import latticeExecuter
 
 def getDefLatticeFaceColor():
     return (1.0, 0.7019608020782471, 0.0, 0.0) #orange
@@ -93,6 +94,10 @@ class LatticeFeature():
         obj.addProperty("App::PropertyInteger",prop,"Lattice","Info: number of placements in the array")
         obj.setEditorMode(prop, 1) # set read-only
         
+        prop = "SingleByDesign"
+        obj.addProperty("App::PropertyBool",prop,"Lattice","Makes the element be populated into object's Placement property")
+        obj.setEditorMode(prop, 2) # set hidden
+
         obj.addProperty("App::PropertyLength","MarkerSize","Lattice","Size of placement markers (set to zero for automatic).")
 
         obj.addProperty("App::PropertyEnumeration","isLattice","Lattice","Sets whether this object should be treated as a lattice by further operations")
@@ -121,6 +126,12 @@ class LatticeFeature():
                 markerSize = getMarkerSizeEstimate(plms)
             marker = latticeMarkers.getPlacementMarker(scale=markerSize)
             #FIXME: make hierarchy-aware
+            if obj.SingleByDesign:
+                if len(plms) != 1:
+                    latticeExecuter.warning(obj,"Multiple placements are being fed, but object is single by design. Only fisrt placement will be used...")
+                obj.Shape = marker.copy()
+                obj.Placement = plms[0]
+            else:
                 for plm in plms:
                     sh = marker.copy()
                     sh.Placement = plm
@@ -131,7 +142,6 @@ class LatticeFeature():
                     raise ValueError('Lattice object is null') #Feeding empty compounds to FreeCAD seems to cause rendering issues, otherwise it would have been a good idea to output nothing.
                 
                 sh = Part.makeCompound(shapes)
-            sh.Placement = obj.Placement #Fix single placement behaving badly
                 obj.Shape = sh
 
             if obj.isLattice == 'Auto-Off':

latticePlacement.py

@@ -54,6 +54,8 @@ class LatticePlacement(latticeBaseFeature.LatticeFeature):
         
         obj.addProperty("App::PropertyBool","Invert","Lattice Placement","Invert the placement")
         
+        obj.SingleByDesign = True
+        
     def updateReadOnlyness(self, obj):
         m = obj.PlacementChoice
         obj.setEditorMode("Placement", 0 if m == "Custom" else 1)        
@@ -86,7 +88,7 @@ class LatticePlacement(latticeBaseFeature.LatticeFeature):
             if obj.PlacementChoice == 'Custom':
                 obj.Invert = False
         
-        return [App.Placement()] #always return default placement, because Placement property is automatically applied on top of it.
+        return [obj.Placement]
 
 class ViewProviderLatticePlacement(latticeBaseFeature.ViewProviderLatticeFeature):