Extensions. Fix Render extensions applied in transformed layers or groups (bug #1503882)

Fixed bugs:
  - https://launchpad.net/bugs/1503882

(bzr r14531)

22 files changed, 86 insertions, 45 deletions

diff --git a/share/extensions/foldablebox.py b/share/extensions/foldablebox.py
index b504de89f..9d58974c5 100755
--- a/share/extensions/foldablebox.py
+++ b/share/extensions/foldablebox.py
@@ -22,6 +22,7 @@ __version__ = "0.2"
 import inkex, simplestyle
 from math import *
 from simplepath import formatPath
+import simpletransform
 
 class FoldableBox(inkex.Effect):
 
@@ -258,6 +259,12 @@ class FoldableBox(inkex.Effect):
 
         g.set( 'transform', 'translate(%f,%f)' % ( (docW-left_pos)/2, (docH-lower_pos)/2 ) )
 
+        # compensate preserved transforms of parent layer
+        if self.current_layer.getparent() is not None:
+            mat = simpletransform.composeParents(self.current_layer, [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
+            simpletransform.applyTransformToNode(simpletransform.invertTransform(mat), g)
+
+
 if __name__ == '__main__':   #pragma: no cover
     e = FoldableBox()
     e.affect()
diff --git a/share/extensions/grid_cartesian.py b/share/extensions/grid_cartesian.py
index 23df0ff84..ae4c6b6b4 100755
--- a/share/extensions/grid_cartesian.py
+++ b/share/extensions/grid_cartesian.py
@@ -25,6 +25,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 import inkex
 import simplestyle, sys
 from math import *
+from simpletransform import computePointInNode
 
 def draw_SVG_line(x1, y1, x2, y2, width, name, parent):
     style = { 'stroke': '#000000', 'stroke-width':str(width), 'fill': 'none' }
@@ -139,8 +140,9 @@ class Grid_Polar(inkex.Effect):
         
         # Embed grid in group
         #Put in in the centre of the current view
-        t = 'translate(' + str( self.view_center[0]- xmax/2.0) + ',' + \
-                           str( self.view_center[1]- ymax/2.0) + ')'
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
+        t = 'translate(' + str( view_center[0]- xmax/2.0) + ',' + \
+                           str( view_center[1]- ymax/2.0) + ')'
         g_attribs = {inkex.addNS('label','inkscape'):'Grid_Polar:X' + \
                      str( self.options.x_divs )+':Y'+str( self.options.y_divs ),
                      'transform':t }
diff --git a/share/extensions/grid_isometric.py b/share/extensions/grid_isometric.py
index 8ac407613..6202fd9e2 100755
--- a/share/extensions/grid_isometric.py
+++ b/share/extensions/grid_isometric.py
@@ -26,6 +26,7 @@
 import inkex
 import simplestyle, sys
 from math import *
+from simpletransform import computePointInNode
 
 
 def draw_SVG_line(x1, y1, x2, y2, width, name, parent):
@@ -101,8 +102,9 @@ class Grid_Polar(inkex.Effect):
 
         #Embed grid in group
         #Put in in the centre of the current view
-        t = 'translate(' + str( self.view_center[0]- xmax/2.0) + ',' + \
-                           str( self.view_center[1]- ymax/2.0) + ')'
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
+        t = 'translate(' + str( view_center[0]- xmax/2.0) + ',' + \
+                           str( view_center[1]- ymax/2.0) + ')'
         g_attribs = {inkex.addNS('label','inkscape'):'Grid_Polar:X' + \
                      str( self.options.x_divs )+':Y'+str( self.options.y_divs ),
                      'transform':t }
diff --git a/share/extensions/grid_polar.py b/share/extensions/grid_polar.py
index 17c3499cb..350b21195 100755
--- a/share/extensions/grid_polar.py
+++ b/share/extensions/grid_polar.py
@@ -23,6 +23,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 import inkex
 import simplestyle, sys
 from math import *
+from simpletransform import computePointInNode
 
 def draw_SVG_circle(r, cx, cy, width, fill, name, parent):
     style = { 'stroke': '#000000', 'stroke-width':str(width), 'fill': fill }
@@ -131,7 +132,8 @@ class Grid_Polar(inkex.Effect):
 
         # Embed grid in group
         #Put in in the centre of the current view
-        t = 'translate(' + str( self.view_center[0] ) + ',' + str( self.view_center[1] ) + ')'
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
+        t = 'translate(' + str( view_center[0] ) + ',' + str( view_center[1] ) + ')'
         g_attribs = {inkex.addNS('label','inkscape'):'Grid_Polar:R' +
                                  str( self.options.r_divs )+':A'+str( self.options.a_divs ),
                      'transform':t }
diff --git a/share/extensions/hershey.py b/share/extensions/hershey.py
index 1ddabfbe0..d0b27b129 100755
--- a/share/extensions/hershey.py
+++ b/share/extensions/hershey.py
@@ -22,6 +22,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 import hersheydata          #data file w/ Hershey font data
 import inkex
 import simplestyle
+from simpletransform import computePointInNode
 
 Debug = False
 
@@ -98,7 +99,8 @@ class Hershey( inkex.Effect ):
             w = wmax
             
         #  Translate group to center of view, approximately
-        t = 'translate(' + str( self.view_center[0] - scale*w/2) + ',' + str( self.view_center[1] ) + ')'
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
+        t = 'translate(' + str( view_center[0] - scale*w/2) + ',' + str( view_center[1] ) + ')'
         if scale != 1:
             t += ' scale(' + str(scale) + ')'
         g.set( 'transform',t)
diff --git a/share/extensions/lindenmayer.py b/share/extensions/lindenmayer.py
index 2e058f541..eb0d84328 100755
--- a/share/extensions/lindenmayer.py
+++ b/share/extensions/lindenmayer.py
@@ -17,6 +17,7 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 '''
 import inkex, simplestyle, pturtle, random
+from simpletransform import computePointInNode
 
 def stripme(s):
     return s.strip()
@@ -68,7 +69,7 @@ class LSystem(inkex.Effect):
         return self.turtle.getPath()
     def __compose_path(self, string):
         self.turtle.pu()
-        self.turtle.setpos(self.view_center)
+        self.turtle.setpos(computePointInNode(list(self.view_center), self.current_layer))
         self.turtle.pd()
         for c in string:
             if c in 'ABCDEF':
diff --git a/share/extensions/perspective.py b/share/extensions/perspective.py
index 044257ae8..a6ee5810b 100755
--- a/share/extensions/perspective.py
+++ b/share/extensions/perspective.py
@@ -32,7 +32,6 @@ import inkex
 import simplepath
 import cubicsuperpath
 import simpletransform
-import voronoi2svg
 from ffgeom import *
 
 inkex.localize()
@@ -139,7 +138,7 @@ class Project(inkex.Effect):
                 csp[0] = self.project_point(csp[0],m)
                 csp[1] = self.project_point(csp[1],m)
                 csp[2] = self.project_point(csp[2],m)
-        mat = voronoi2svg.Voronoi2svg().invertTransform(mat)
+        mat = simpletransform.invertTransform(mat)
         simpletransform.applyTransformToPath(mat, p)
         path.set('d',cubicsuperpath.formatPath(p))
 
diff --git a/share/extensions/polyhedron_3d.py b/share/extensions/polyhedron_3d.py
index f191d7f89..8e4a8e8e6 100755
--- a/share/extensions/polyhedron_3d.py
+++ b/share/extensions/polyhedron_3d.py
@@ -55,6 +55,7 @@ from math import *
 # local library
 import inkex
 import simplestyle
+from simpletransform import computePointInNode
 
 inkex.localize()
 
@@ -467,7 +468,8 @@ class Poly_3D(inkex.Effect):
         #INKSCAPE GROUP TO CONTAIN THE POLYHEDRON
         
         #Put in in the centre of the current view
-        poly_transform = 'translate(' + str( self.view_center[0]) + ',' + str( self.view_center[1]) + ')'
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
+        poly_transform = 'translate(' + str( view_center[0]) + ',' + str( view_center[1]) + ')'
         if scale != 1:
             poly_transform += ' scale(' + str(scale) + ')'
         #we will put all the rotations in the object name, so it can be repeated in 
diff --git a/share/extensions/render_alphabetsoup.py b/share/extensions/render_alphabetsoup.py
index 083f03af9..a2cbcb978 100755
--- a/share/extensions/render_alphabetsoup.py
+++ b/share/extensions/render_alphabetsoup.py
@@ -33,6 +33,7 @@ import simplestyle
 import render_alphabetsoup_config
 import bezmisc
 import simplepath
+import simpletransform
 
 inkex.localize()
 
@@ -533,6 +534,12 @@ class AlphabetSoup(inkex.Effect):
 			new.set('d', simplepath.formatPath(image))
 			self.current_layer.append(new)
 
+			# compensate preserved transforms of parent layer
+			if self.current_layer.getparent() is not None:
+				mat = simpletransform.composeParents(self.current_layer, [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
+				simpletransform.applyTransformToNode(simpletransform.invertTransform(mat), new)
+
+
 if __name__ == '__main__':
     e = AlphabetSoup()
     e.affect()
diff --git a/share/extensions/render_barcode.py b/share/extensions/render_barcode.py
index 694dcc8f3..4f1464a92 100755
--- a/share/extensions/render_barcode.py
+++ b/share/extensions/render_barcode.py
@@ -24,6 +24,7 @@ Barcode module provided for outside or scripting.
 import inkex
 import sys
 from Barcode import getBarcode
+from simpletransform import computePointInNode
 
 class InsertBarcode(inkex.Effect):
     def __init__(self):
@@ -42,7 +43,7 @@ class InsertBarcode(inkex.Effect):
                         help="Text to print on barcode")
 
     def effect(self):
-        x, y = self.view_center
+        x, y = computePointInNode(list(self.view_center), self.current_layer)
         bargen = getBarcode( self.options.type,
             text=self.options.text,
             height=self.options.height,
diff --git a/share/extensions/render_barcode_datamatrix.py b/share/extensions/render_barcode_datamatrix.py
index 83d009db8..72ffddbe6 100755
--- a/share/extensions/render_barcode_datamatrix.py
+++ b/share/extensions/render_barcode_datamatrix.py
@@ -54,6 +54,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 # local library
 import inkex
 import simplestyle
+from simpletransform import computePointInNode
 
 inkex.localize()
     
@@ -680,7 +681,7 @@ class DataMatrix(inkex.Effect):
         
             #INKSCAPE GROUP TO CONTAIN EVERYTHING
             
-            centre = self.view_center   #Put in in the centre of the current view
+            centre = tuple(computePointInNode(list(self.view_center), self.current_layer))   #Put in in the centre of the current view
             grp_transform = 'translate' + str( centre ) + ' scale(%f)' % scale
             grp_name = 'DataMatrix'
             grp_attribs = {inkex.addNS('label','inkscape'):grp_name,
diff --git a/share/extensions/render_barcode_qrcode.py b/share/extensions/render_barcode_qrcode.py
index 7b4895195..d4cffd3e2 100755
--- a/share/extensions/render_barcode_qrcode.py
+++ b/share/extensions/render_barcode_qrcode.py
@@ -2,6 +2,7 @@
 
 import math, sys
 import inkex
+from simpletransform import computePointInNode
 
 inkex.localize()
 
@@ -1057,7 +1058,7 @@ class QRCodeInkscape(inkex.Effect):
             #INKSCAPE GROUP TO CONTAIN EVERYTHING
             
             so.TEXT = unicode(so.TEXT, so.input_encode)
-            centre = self.view_center   #Put in in the centre of the current view
+            centre = tuple(computePointInNode(list(self.view_center), self.current_layer))   #Put in in the centre of the current view
             grp_transform = 'translate' + str( centre ) + ' scale(%f)' % scale
             grp_name = 'QR Code: '+so.TEXT
             grp_attribs = {inkex.addNS('label','inkscape'):grp_name,
diff --git a/share/extensions/render_gear_rack.py b/share/extensions/render_gear_rack.py
index dfecf0438..63433aadb 100755
--- a/share/extensions/render_gear_rack.py
+++ b/share/extensions/render_gear_rack.py
@@ -19,6 +19,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 import inkex
 import simplestyle
+from simpletransform import computePointInNode
 from math import *
 
 
@@ -85,8 +86,9 @@ class RackGear(inkex.Effect):
 
         # Embed gear in group to make animation easier:
         #  Translate group, Rotate path.
-        t = 'translate(' + str(self.view_center[0]) + ',' + \
-            str(self.view_center[1]) + ')'
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
+        t = 'translate(' + str(view_center[0]) + ',' + \
+            str(view_center[1]) + ')'
         g_attribs = {
             inkex.addNS('label', 'inkscape'): 'RackGear' + str(length),
             'transform': t}
diff --git a/share/extensions/render_gears.py b/share/extensions/render_gears.py
index 8a481cdb9..2584117f2 100755
--- a/share/extensions/render_gears.py
+++ b/share/extensions/render_gears.py
@@ -20,6 +20,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 import inkex
 import simplestyle, sys
+from simpletransform import computePointInNode
 from math import *
 import string
 
@@ -158,7 +159,8 @@ class Gears(inkex.Effect):
 
         # Embed gear in group to make animation easier:
         #  Translate group, Rotate path.
-        t = 'translate(' + str( self.view_center[0] ) + ',' + str( self.view_center[1] ) + ')'
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
+        t = 'translate(' + str( view_center[0] ) + ',' + str( view_center[1] ) + ')'
         g_attribs = {inkex.addNS('label','inkscape'):'Gear' + str( teeth ),
                      'transform':t }
         g = inkex.etree.SubElement(self.current_layer, 'g', g_attribs)
diff --git a/share/extensions/rtree.py b/share/extensions/rtree.py
index 7123beb1e..c0dc1cca6 100755
--- a/share/extensions/rtree.py
+++ b/share/extensions/rtree.py
@@ -18,6 +18,7 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 '''
 import inkex, simplestyle, pturtle, random
+from simpletransform import computePointInNode
 
 def rtree(turtle, size, min, pt=False):
     if size < min:
@@ -61,7 +62,7 @@ class RTreeTurtle(inkex.Effect):
             'fill': 'none'}
         t = pturtle.pTurtle()
         t.pu()
-        t.setpos(self.view_center)
+        t.setpos(computePointInNode(list(self.view_center), self.current_layer))
         t.pd()
         rtree(t, self.options.size, self.options.minimum, self.options.pentoggle)
         
diff --git a/share/extensions/simpletransform.py b/share/extensions/simpletransform.py
index 8a097f46e..8b6f46935 100644
--- a/share/extensions/simpletransform.py
+++ b/share/extensions/simpletransform.py
@@ -78,6 +78,21 @@ def parseTransform(transf,mat=[[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]):
 def formatTransform(mat):
     return ("matrix(%f,%f,%f,%f,%f,%f)" % (mat[0][0], mat[1][0], mat[0][1], mat[1][1], mat[0][2], mat[1][2]))
 
+def invertTransform(mat):
+    det = mat[0][0]*mat[1][1] - mat[0][1]*mat[1][0]
+    if det !=0:  # det is 0 only in case of 0 scaling
+        # invert the rotation/scaling part
+        a11 =  mat[1][1]/det
+        a12 = -mat[0][1]/det
+        a21 = -mat[1][0]/det
+        a22 =  mat[0][0]/det
+        # invert the translational part
+        a13 = -(a11*mat[0][2] + a12*mat[1][2])
+        a23 = -(a21*mat[0][2] + a22*mat[1][2])
+        return [[a11,a12,a13],[a21,a22,a23]]
+    else:
+        return[[0,0,-mat[0][2]],[0,0,-mat[1][2]]]
+
 def composeTransform(M1,M2):
     a11 = M1[0][0]*M2[0][0] + M1[0][1]*M2[1][0]
     a12 = M1[0][0]*M2[0][1] + M1[0][1]*M2[1][1]
@@ -237,4 +252,10 @@ def computeBBox(aList,mat=[[1,0,0],[0,1,0]]):
     return bbox
 
 
+def computePointInNode(pt, node, mat=[[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]):
+    if node.getparent() is not None:
+        applyTransformToPoint(invertTransform(composeParents(node, mat)), pt)
+    return pt
+
+
 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
diff --git a/share/extensions/spirograph.py b/share/extensions/spirograph.py
index 77a258d5f..e702344a5 100755
--- a/share/extensions/spirograph.py
+++ b/share/extensions/spirograph.py
@@ -17,6 +17,7 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 '''
 import inkex, simplestyle, math
+from simpletransform import computePointInNode
 
 class Spirograph(inkex.Effect):
     def __init__(self):
@@ -81,12 +82,13 @@ class Spirograph(inkex.Effect):
 
             theta = i * scale
 
+            view_center = computePointInNode(list(self.view_center), self.current_layer)
             x = a * math.cos(theta + rotation) + \
                 self.options.penr * math.cos(ratio * theta + rotation) * flip + \
-                self.view_center[0]
+                view_center[0]
             y = a * math.sin(theta + rotation) - \
                 self.options.penr * math.sin(ratio * theta + rotation) + \
-                self.view_center[1]
+                view_center[1]
 
             dx = (-a * math.sin(theta + rotation) - \
                 ratio * self.options.penr * math.sin(ratio * theta + rotation) * flip) * scale / 3
diff --git a/share/extensions/summersnight.py b/share/extensions/summersnight.py
index 67413a05c..fbf88fe92 100755
--- a/share/extensions/summersnight.py
+++ b/share/extensions/summersnight.py
@@ -24,7 +24,6 @@ import cubicsuperpath
 import inkex
 import simplepath
 import simpletransform
-import voronoi2svg
 from ffgeom import *
 
 inkex.localize()
@@ -115,7 +114,7 @@ class Project(inkex.Effect):
                 csp[0] = self.trafopoint(csp[0])
                 csp[1] = self.trafopoint(csp[1])
                 csp[2] = self.trafopoint(csp[2])
-        mat = voronoi2svg.Voronoi2svg().invertTransform(mat)
+        mat = simpletransform.invertTransform(mat)
         simpletransform.applyTransformToPath(mat, p)
         path.set('d',cubicsuperpath.formatPath(p))
 
diff --git a/share/extensions/triangle.py b/share/extensions/triangle.py
index 019db3147..ecd977d40 100755
--- a/share/extensions/triangle.py
+++ b/share/extensions/triangle.py
@@ -34,6 +34,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 import inkex
 import simplestyle, sys
+from simpletransform import computePointInNode
 from math import *
 
 def draw_SVG_tri( (x1, y1), (x2, y2), (x3, y3), (ox,oy), width, name, parent):
@@ -121,7 +122,7 @@ class Grid_Polar(inkex.Effect):
     def effect(self):
         
         tri = self.current_layer
-        offset = (self.view_center[0],self.view_center[1]) #the offset require to centre the triangle
+        offset = computePointInNode(list(self.view_center), self.current_layer) #the offset require to centre the triangle
         self.options.s_a = self.unittouu(str(self.options.s_a) + 'px')
         self.options.s_b = self.unittouu(str(self.options.s_b) + 'px')
         self.options.s_c = self.unittouu(str(self.options.s_c) + 'px')
diff --git a/share/extensions/voronoi2svg.py b/share/extensions/voronoi2svg.py
index 289c352e3..26a89393c 100755
--- a/share/extensions/voronoi2svg.py
+++ b/share/extensions/voronoi2svg.py
@@ -171,23 +171,6 @@ class Voronoi2svg(inkex.Effect):
 
   #{{{ Transformation helpers
 
-  def invertTransform(self,mat):
-    det = mat[0][0]*mat[1][1] - mat[0][1]*mat[1][0]
-    if det !=0: #det is 0 only in case of 0 scaling
-      #invert the rotation/scaling part
-      a11 =  mat[1][1]/det
-      a12 = -mat[0][1]/det
-      a21 = -mat[1][0]/det
-      a22 =  mat[0][0]/det
-
-      #invert the translational part
-      a13 = -(a11*mat[0][2] + a12*mat[1][2])
-      a23 = -(a21*mat[0][2] + a22*mat[1][2])
-
-      return [[a11,a12,a13],[a21,a22,a23]]
-    else:
-      return[[0,0,-mat[0][2]],[0,0,-mat[1][2]]]
-
   def getGlobalTransform(self,node):
     parent = node.getparent()
     myTrans = simpletransform.parseTransform(node.get('transform'))
@@ -239,7 +222,7 @@ class Voronoi2svg(inkex.Effect):
     trans = self.getGlobalTransform(parentGroup)
     invtrans = None
     if trans:
-      invtrans = self.invertTransform(trans)
+      invtrans = simpletransform.invertTransform(trans)
 
     #}}}
 
diff --git a/share/extensions/whirl.py b/share/extensions/whirl.py
index cea9da8df..7ee9cc0a2 100755
--- a/share/extensions/whirl.py
+++ b/share/extensions/whirl.py
@@ -17,6 +17,7 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 '''
 import math, inkex, cubicsuperpath
+from simpletransform import computePointInNode
 
 class Whirl(inkex.Effect):
     def __init__(self):
@@ -30,6 +31,7 @@ class Whirl(inkex.Effect):
                         dest="rotation", default=True,
                         help="direction of rotation")
     def effect(self):
+        view_center = computePointInNode(list(self.view_center), self.current_layer)
         for id, node in self.selected.iteritems():
             rotation = -1
             if self.options.rotation == True:
@@ -41,16 +43,16 @@ class Whirl(inkex.Effect):
                 for sub in p:
                     for csp in sub:
                         for point in csp:
-                            point[0] -= self.view_center[0]
-                            point[1] -= self.view_center[1]
+                            point[0] -= view_center[0]
+                            point[1] -= view_center[1]
                             dist = math.sqrt((point[0] ** 2) + (point[1] ** 2))
                             if dist != 0:
                                 a = rotation * dist * whirl
                                 theta = math.atan2(point[1], point[0]) + a
                                 point[0] = (dist * math.cos(theta))
                                 point[1] = (dist * math.sin(theta))
-                            point[0] += self.view_center[0]
-                            point[1] += self.view_center[1]
+                            point[0] += view_center[0]
+                            point[1] += view_center[1]
                 node.set('d',cubicsuperpath.formatPath(p))
 
 if __name__ == '__main__':
diff --git a/share/extensions/wireframe_sphere.py b/share/extensions/wireframe_sphere.py
index bcd676dc4..bda06af21 100755
--- a/share/extensions/wireframe_sphere.py
+++ b/share/extensions/wireframe_sphere.py
@@ -59,6 +59,7 @@ from math import *
 # local library
 import inkex
 import simplestyle
+from simpletransform import computePointInNode
 
 inkex.localize()
 
@@ -129,7 +130,7 @@ class Wireframe_Sphere(inkex.Effect):
 
             #INKSCAPE GROUP TO CONTAIN EVERYTHING
             
-            centre = self.view_center   #Put in in the centre of the current view
+            centre = tuple(computePointInNode(list(self.view_center), self.current_layer))   #Put in in the centre of the current view
             grp_transform = 'translate' + str( centre ) + flip
             grp_name = 'WireframeSphere'
             grp_attribs = {inkex.addNS('label','inkscape'):grp_name,