diff --git a/invesalius/data/measures.py b/invesalius/data/measures.py
index 5c0b410..8637aff 100644
--- a/invesalius/data/measures.py
+++ b/invesalius/data/measures.py
@@ -38,14 +38,14 @@ class CirclePointRepresentation(object):
         sphere.SetCenter(x, y, z)
         sphere.SetRadius(self.radius)
         
-        c = vtk.vtkCoordinate()
-        c.SetCoordinateSystemToWorld()
+#        c = vtk.vtkCoordinate()
+#        c.SetCoordinateSystemToWorld()
         
-        m = vtk.vtkPolyDataMapper2D()
+        m = vtk.vtkPolyDataMapper()
         m.SetInputConnection(sphere.GetOutputPort())
-        m.SetTransformCoordinate(c)
+#        m.SetTransformCoordinate(c)
 
-        a = vtk.vtkActor2D()
+        a = vtk.vtkActor()
         a.SetMapper(m)
         a.GetProperty().SetColor(self.colour)
 
diff --git a/invesalius/data/viewer_volume.py b/invesalius/data/viewer_volume.py
index dcf2b28..06be475 100755
--- a/invesalius/data/viewer_volume.py
+++ b/invesalius/data/viewer_volume.py
@@ -91,8 +91,8 @@ class Viewer(wx.Panel):
 
         self.points_reference = []
 
-        self.measure_picker = vtk.vtkPointPicker()
-        self.measure_picker.SetTolerance(0.005)
+        self.measure_picker = vtk.vtkPropPicker()
+        #self.measure_picker.SetTolerance(0.005)
         self.measures = []
         
 
@@ -299,6 +299,10 @@ class Viewer(wx.Panel):
               const.STATE_MEASURE_DISTANCE:
                   {
                   "LeftButtonPressEvent": self.OnInsertLinearMeasurePoint
+                  },
+              const.STATE_ANGULAR_MEASURE:
+                  {
+                  "LeftButtonPressEvent": self.OnInsertAngularMeasurePoint
                   }
               }
 
@@ -312,7 +316,8 @@ class Viewer(wx.Panel):
             self.text.Hide()
             self.interactor.Render()
 
-        if state == const.STATE_MEASURE_DISTANCE:
+        if state in (const.STATE_MEASURE_DISTANCE,
+                const.STATE_MEASURE_ANGLE):
             self.interactor.SetPicker(self.measure_picker)
 
         if (state == const.STATE_ZOOM_SL):
@@ -610,17 +615,20 @@ class Viewer(wx.Panel):
         x,y = self.interactor.GetEventPosition()
         self.measure_picker.Pick(x, y, 0, self.ren)
         x, y, z = self.measure_picker.GetPickPosition()
-        if self.measure_picker.GetPointId() != -1: 
-            if not self.measures or self.measures[-1].point_actor2:
-                m = measures.LinearMeasure(self.ren)
-                m.SetPoint1(x, y, z)
-                self.measures.append(m)
-            else:
-                m = self.measures[-1]
-                m.SetPoint2(x, y, z)
-                ps.Publisher().sendMessage("Add measure to list", 
-                        ("3D", _("%.3f mm3" % m.GetValue())))
-            self.interactor.Render()
+#        if self.measure_picker.GetPointId() != -1: 
+        if not self.measures or self.measures[-1].point_actor2:
+            m = measures.LinearMeasure(self.ren)
+            m.SetPoint1(x, y, z)
+            self.measures.append(m)
+        else:
+            m = self.measures[-1]
+            m.SetPoint2(x, y, z)
+            ps.Publisher().sendMessage("Add measure to list", 
+                    ("3D", _("%.3f mm3" % m.GetValue())))
+        self.interactor.Render()
+
+    def OnInsertAngularMeasurePoint(self, obj, evt):
+        print "Hey, you inserted a angular point"
 
 
 class SlicePlane:
diff --git a/invesalius/gui/task_tools.py b/invesalius/gui/task_tools.py
index 573fd8f..b596790 100644
--- a/invesalius/gui/task_tools.py
+++ b/invesalius/gui/task_tools.py
@@ -121,12 +121,12 @@ class InnerTaskPanel(wx.Panel):
         print "TODO: Send Signal - Add text annotation (both 2d and 3d)"
 
     def OnLinkLinearMeasure(self):
-        #print "TODO: Send Signal - Add linear measure (both 2d and 3d)"
         ps.Publisher().sendMessage('Enable style',
-                constants.STATE_LINEAR_MEASURE)
+                constants.STATE_MEASURE_DISTANCE)
 
     def OnLinkAngularMeasure(self):
-        print "TODO: Send Signal - Add angular measure (both 2d and 3d)"
+        ps.Publisher().sendMessage('Enable style',
+                constants.STATE_MEASURE_ANGLE)
 
     def OnButton(self, evt):
         id = evt.GetId()
--
libgit2 0.21.2