From 783ec34967454766d4cb497aece281dd86746b74 Mon Sep 17 00:00:00 2001
From: Yorik van Havre <yorik@uncreated.net>
Date: Fri, 26 Aug 2016 15:10:33 -0300
Subject: [PATCH] Minor bugfixes in Arch & Draft

---
 src/Mod/Arch/ArchEquipment.py | 3 +++
 src/Mod/Draft/Draft.py        | 7 +++++--
 src/Mod/Draft/DraftTools.py   | 5 +++--
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/Mod/Arch/ArchEquipment.py b/src/Mod/Arch/ArchEquipment.py
index ea1c67edb..6562ce440 100644
--- a/src/Mod/Arch/ArchEquipment.py
+++ b/src/Mod/Arch/ArchEquipment.py
@@ -299,11 +299,14 @@ class _ViewProviderEquipment(ArchComponent.ViewProviderComponent):
         sep = coin.SoSeparator()
         self.coords = coin.SoCoordinate3()
         sep.addChild(self.coords)
+        self.coords.point.deleteValues(0)
         symbol = coin.SoMarkerSet()
         symbol.markerIndex = coin.SoMarkerSet.CIRCLE_FILLED_5_5
         sep.addChild(symbol)
         rn = vobj.RootNode
         rn.addChild(sep)
+        ArchComponent.ViewProviderComponent.attach(self,vobj)
+        
         
     def updateData(self, obj, prop):
         if prop == "SnapPoints":
diff --git a/src/Mod/Draft/Draft.py b/src/Mod/Draft/Draft.py
index 505967df1..8d27270de 100644
--- a/src/Mod/Draft/Draft.py
+++ b/src/Mod/Draft/Draft.py
@@ -4522,8 +4522,11 @@ class _ViewProviderWire(_ViewProviderDraft):
                     self.coords.scaleFactor.setValue((s,s,s))
                     rn.addChild(self.pt)
                 else:
-                    self.pt.removeChild(self.symbol)
-                    rn.removeChild(self.pt)
+                    if self.symbol:
+                        if self.pt.findChild(self.symbol) != -1:
+                            self.pt.removeChild(self.symbol)
+                        if rn.findChild(self.pt) != -1:
+                            rn.removeChild(self.pt)
         _ViewProviderDraft.onChanged(self,vobj,prop)
         return
 
diff --git a/src/Mod/Draft/DraftTools.py b/src/Mod/Draft/DraftTools.py
index 44cf592cb..69ff8ed3e 100644
--- a/src/Mod/Draft/DraftTools.py
+++ b/src/Mod/Draft/DraftTools.py
@@ -4608,8 +4608,9 @@ class Draft_Slope():
                             if not lp:
                                 lp = p
                             else:
-                                z = pc*FreeCAD.Vector(p.x,p.y,lp.z).Length
-                                lp = FreeCAD.Vector(p.x,p.y,z)
+                                v = p.sub(lp)
+                                z = pc*FreeCAD.Vector(v.x,v.y,0).Length
+                                lp = FreeCAD.Vector(p.x,p.y,lp.z+z)
                             np.append(lp)
                         obj.Points = np
             FreeCAD.ActiveDocument.commitTransaction()