X-Git-Url: https://git.ao2.it/vrm.git/blobdiff_plain/de221ecd94607f731bb5d39c4d71447e3b545098..efa292dcd4cfb88bb0a1d45147c408e500a86d73:/vrm.py

diff --git a/vrm.py b/vrm.py
index 15fba09..86c8fba 100755
--- a/vrm.py
+++ b/vrm.py
@@ -8,14 +8,14 @@ Tooltip: 'Vector Rendering Method script'
 
 __author__ = "Antonio Ospite"
 __url__ = ["http://vrm.ao2.it"]
-__version__ = "0.3.beta"
+__version__ = "0.3"
 
 __bpydoc__ = """\
     Render the scene and save the result in vector format.
 """
 
 # ---------------------------------------------------------------------
-#    Copyright (c) 2006, 2007, 2008, 2009 Antonio Ospite
+#    Copyright (c) 2006, 2007, 2008, 2009, 2012 Antonio Ospite
 #
 #    This program is free software; you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -66,7 +66,8 @@ import Blender
 from Blender import Scene, Object, Mesh, NMesh, Material, Lamp, Camera, Window
 from Blender.Mathutils import *
 from math import *
-import sys, time
+import sys
+import time
 
 try:
     set()
@@ -76,7 +77,7 @@ except NameError:
 
 def uniq(alist):
     tmpdict = dict()
-    return [tmpdict.setdefault(e,e) for e in alist if e not in tmpdict]
+    return [tmpdict.setdefault(e, e) for e in alist if e not in tmpdict]
     # in python > 2.4 we ca use the following
     #return [ u for u in alist if u not in locals()['_[1]'] ]
 
@@ -93,8 +94,8 @@ progress = None
 class config:
     polygons = dict()
     polygons['SHOW'] = True
-    polygons['SHADING'] = 'FLAT' # FLAT or TOON
-    polygons['HSR'] = 'PAINTER' # PAINTER or NEWELL
+    polygons['SHADING'] = 'FLAT'  # FLAT or TOON
+    polygons['HSR'] = 'PAINTER'  # PAINTER or NEWELL
     # Hidden to the user for now
     polygons['EXPANSION_TRICK'] = True
 
@@ -103,7 +104,7 @@ class config:
     edges = dict()
     edges['SHOW'] = False
     edges['SHOW_HIDDEN'] = False
-    edges['STYLE'] = 'MESH' # MESH or SILHOUETTE
+    edges['STYLE'] = 'MESH'  # MESH or SILHOUETTE
     edges['WIDTH'] = 2
     edges['COLOR'] = [0, 0, 0]
 
@@ -115,14 +116,14 @@ class config:
     def saveToRegistry():
         registry = {}
 
-        for k,v in config.__dict__.iteritems():
+        for k, v in config.__dict__.iteritems():
 
             # config class store settings in dictionaries
             if v.__class__ == dict().__class__:
 
-                regkey_prefix = k.upper()+"_"
+                regkey_prefix = k.upper() + "_"
 
-                for opt_k,opt_v in v.iteritems():
+                for opt_k, opt_v in v.iteritems():
                     regkey = regkey_prefix + opt_k
 
                     registry[regkey] = opt_v
@@ -134,15 +135,15 @@ class config:
     def loadFromRegistry():
         registry = Blender.Registry.GetKey('VRM', True)
         if not registry:
-           return
+            return
 
-        for k,v in registry.iteritems():
+        for k, v in registry.iteritems():
             k_tmp = k.split('_')
             conf_attr = k_tmp[0].lower()
-            conf_key = str.join("_",k_tmp[1:])
+            conf_key = str.join("_", k_tmp[1:])
             conf_val = v
 
-            if config.__dict__.has_key(conf_attr):
+            if conf_attr in config.__dict__:
                 config.__dict__[conf_attr][conf_key] = conf_val
 
     loadFromRegistry = staticmethod(loadFromRegistry)
@@ -151,6 +152,7 @@ class config:
 # Utility functions
 print_debug = False
 
+
 def dumpfaces(flist, filename):
     """Dump a single face to a file.
     """
@@ -170,17 +172,20 @@ def dumpfaces(flist, filename):
 
     writerobj.close()
 
+
 def debug(msg):
     if print_debug:
         sys.stderr.write(msg)
 
+
 def EQ(v1, v2):
-    return (abs(v1[0]-v2[0]) < EPS and
-            abs(v1[1]-v2[1]) < EPS )
+    return (abs(v1[0] - v2[0]) < EPS and
+            abs(v1[1] - v2[1]) < EPS)
 by_furthest_z = (lambda f1, f2:
-    cmp(max([v.co[2] for v in f1]), max([v.co[2] for v in f2])+EPS)
+    cmp(max([v.co[2] for v in f1]), max([v.co[2] for v in f2]) + EPS)
     )
 
+
 def sign(x):
 
     if x < -EPS:
@@ -202,6 +207,7 @@ def sign(x):
 EPS = 10e-5
 INF = 10e5
 
+
 class HSR:
     """A utility class for HSR processing.
     """
@@ -212,9 +218,9 @@ class HSR:
         From: http://mathworld.wolfram.com/Coplanar.html
 
         Geometric objects lying in a common plane are said to be coplanar.
-        Three noncollinear points determine a plane and so are trivially coplanar.
-        Four points are coplanar iff the volume of the tetrahedron defined by them is
-        0,
+        Three noncollinear points determine a plane and so are trivially
+        coplanar. Four points are coplanar iff the volume of the tetrahedron
+        defined by them is 0,
 
             | x_1 y_1 z_1 1 |
             | x_2 y_2 z_2 1 |
@@ -222,8 +228,8 @@ class HSR:
             | x_4 y_4 z_4 1 | == 0
 
         Coplanarity is equivalent to the statement that the pair of lines
-        determined by the four points are not skew, and can be equivalently stated
-        in vector form as (x_3-x_1).[(x_2-x_1)x(x_4-x_3)]==0.
+        determined by the four points are not skew, and can be equivalently
+        stated in vector form as (x_3-x_1).[(x_2-x_1)x(x_4-x_3)]==0.
 
         An arbitrary number of n points x_1, ..., x_n can be tested for
         coplanarity by finding the point-plane distances of the points
@@ -243,13 +249,13 @@ class HSR:
         elif n == 3:
             # three points must be complanar
             return False
-        else: # n == 4
+        else:  # n == 4
             x1 = Vector(face[0].co)
             x2 = Vector(face[1].co)
             x3 = Vector(face[2].co)
             x4 = Vector(face[3].co)
 
-            v = (x3-x1) * CrossVecs((x2-x1), (x4-x3))
+            v = (x3 - x1) * CrossVecs((x2 - x1), (x4 - x3))
             if v != 0:
                 return True
 
@@ -275,25 +281,24 @@ class HSR:
         #z3 = s2[0].co[2]
         #z4 = s2[1].co[2]
 
-
         # calculate delta values (vector components)
-        dx1 = x2 - x1;
-        dx2 = x4 - x3;
-        dy1 = y2 - y1;
-        dy2 = y4 - y3;
+        dx1 = x2 - x1
+        dx2 = x4 - x3
+        dy1 = y2 - y1
+        dy2 = y4 - y3
 
-        #dz1 = z2 - z1;
-        #dz2 = z4 - z3;
+        #dz1 = z2 - z1
+        #dz2 = z4 - z3
 
-        C = dy2 * dx1 - dx2 * dy1 #  /* cross product */
-        if C == 0:  #/* parallel */
+        C = dy2 * dx1 - dx2 * dy1  # cross product
+        if C == 0:  # parallel
             return None
 
-        dx3 = x1 - x3 # /* combined origin offset vector */
+        dx3 = x1 - x3  # combined origin offset vector
         dy3 = y1 - y3
 
-        a1 = (dy3 * dx2 - dx3 * dy2) / C;
-        a2 = (dy3 * dx1 - dx3 * dy1) / C;
+        a1 = (dy3 * dx2 - dx3 * dy2) / C
+        a2 = (dy3 * dx1 - dx3 * dy1) / C
 
         # check for degeneracies
         #print_debug("\n")
@@ -304,11 +309,11 @@ class HSR:
             # Intersection on boundaries, we consider the point external?
             return None
 
-        elif (a1>0.0 and a1<1.0 and a2>0.0 and a2<1.0): #  /* lines cross */
-            x = x1 + a1*dx1
-            y = y1 + a1*dy1
+        elif (a1 > 0.0 and a1 < 1.0 and a2 > 0.0 and a2 < 1.0):  # lines cross
+            x = x1 + a1 * dx1
+            y = y1 + a1 * dy1
 
-            #z = z1 + a1*dz1
+            #z = z1 + a1 * dz1
             z = 0
             return (NMesh.Vert(x, y, z), a1, a2)
 
@@ -327,7 +332,7 @@ class HSR:
 
         for i in range(len(self.v)):
             s1 = (point_at_infinity, v)
-            s2 = (self.v[i-1], self.v[i])
+            s2 = (self.v[i - 1], self.v[i])
 
             if EQ(v.co, s2[0].co) or EQ(v.co, s2[1].co):
                 coincidence = True
@@ -336,7 +341,7 @@ class HSR:
                 winding_number += 1
 
         # Check even or odd
-        if winding_number % 2 == 0 :
+        if (winding_number % 2) == 0:
             return False
         else:
             if coincidence:
@@ -345,10 +350,9 @@ class HSR:
 
     isVertInside = staticmethod(isVertInside)
 
-
     def det(a, b, c):
         return ((b[0] - a[0]) * (c[1] - a[1]) -
-                (b[1] - a[1]) * (c[0] - a[0]) )
+                (b[1] - a[1]) * (c[0] - a[0]))
 
     det = staticmethod(det)
 
@@ -360,13 +364,13 @@ class HSR:
         det = HSR.det
 
         for i in range(len(P.v)):
-            p0 = P.v[i-1]
+            p0 = P.v[i - 1]
             p1 = P.v[i]
-            if (det(q.co, point_at_infinity.co, p0.co)<0) != (det(q.co, point_at_infinity.co, p1.co)<0):
-                if det(p0.co, p1.co, q.co) == 0 :
+            if (det(q.co, point_at_infinity.co, p0.co) < 0) != (det(q.co, point_at_infinity.co, p1.co) < 0):
+                if det(p0.co, p1.co, q.co) == 0:
                     #print "On Boundary"
                     return False
-                elif (det(p0.co, p1.co, q.co)<0) != (det(p0.co, p1.co, point_at_infinity.co)<0):
+                elif (det(p0.co, p1.co, q.co) < 0) != (det(p0.co, p1.co, point_at_infinity.co) < 0):
                     is_in = not is_in
 
         return is_in
@@ -386,7 +390,6 @@ class HSR:
 
         for i in range(len(f1.v)):
 
-
             # If a point of f1 in inside f2, there is an overlap!
             v1 = f1.v[i]
             #if HSR.isVertInside(f2, v1):
@@ -396,10 +399,10 @@ class HSR:
             # If not the polygon can be ovelap as well, so we check for
             # intersection between an edge of f1 and all the edges of f2
 
-            v0 = f1.v[i-1]
+            v0 = f1.v[i - 1]
 
             for j in range(len(f2.v)):
-                v2 = f2.v[j-1]
+                v2 = f2.v[j - 1]
                 v3 = f2.v[j]
 
                 e1 = v0, v1
@@ -433,7 +436,7 @@ class HSR:
         """
 
         by_furthest_z = (lambda f1, f2:
-                cmp(max([v.co[2] for v in f1]), max([v.co[2] for v in f2])+EPS)
+                cmp(max([v.co[2] for v in f1]), max([v.co[2] for v in f2]) + EPS)
                 )
 
         # Choose if split P on Q plane or vice-versa
@@ -497,7 +500,6 @@ class HSR:
             #
             #newfaces = splitOn(plane, f)
 
-
         if newfaces == None:
             print "Big FAT problem, we weren't able to split POLYGONS!"
             raise AssertionError
@@ -537,8 +539,8 @@ class HSR:
         """Check if point p is in segment v1v2.
         """
 
-        l1 = (v1-p).length
-        l2 = (v2-p).length
+        l1 = (v1 - p).length
+        l2 = (v2 - p).length
 
         # Should we consider extreme points as internal ?
         # The test:
@@ -546,10 +548,10 @@ class HSR:
         if l1 < EPS or l2 < EPS:
             return extremes_internal
 
-        l = (v1-v2).length
+        l = (v1 - v2).length
 
         # if the sum of l1 and l2 is circa l, then the point is on segment,
-        if abs(l - (l1+l2)) < EPS:
+        if abs(l - (l1 + l2)) < EPS:
             return True
         else:
             return False
@@ -622,16 +624,15 @@ class HSR:
         """
 
         # Check if P and Q are parallel
-        u = CrossVecs(Vector(Q.no),Vector(P.no))
+        u = CrossVecs(Vector(Q.no), Vector(P.no))
         ax = abs(u[0])
         ay = abs(u[1])
         az = abs(u[2])
 
-        if (ax+ay+az) < EPS:
+        if (ax + ay + az) < EPS:
             print "PARALLEL planes!!"
             return
 
-
         # The final aim is to find the intersection line between P
         # and the plane of Q, and split P along this line
 
@@ -647,8 +648,8 @@ class HSR:
         posVertList = []
         negVertList = []
         for i in range(nP):
-            d0 = d[i-1]
-            V0 = P.v[i-1]
+            d0 = d[i - 1]
+            V0 = P.v[i - 1]
 
             d1 = d[i]
             V1 = P.v[i]
@@ -672,7 +673,7 @@ class HSR:
                         negVertList.append(V1)
                 else:
                     # if they are on the same side of the plane
-                    if d1*d0 > 0:
+                    if (d1 * d0) > 0:
                         #print "On the same half-space"
                         if d1 > 0:
                             #print "d1 on positive Halfspace"
@@ -688,7 +689,7 @@ class HSR:
                         e = Vector(V0), Vector(V1)
                         tri = Vector(Q[0]), Vector(Q[1]), Vector(Q[2])
 
-                        inters = Intersect(tri[0], tri[1], tri[2], e[1]-e[0], e[0], 0)
+                        inters = Intersect(tri[0], tri[1], tri[2], e[1] - e[0], e[0], 0)
                         if inters == None:
                             print "Split Break"
                             break
@@ -706,7 +707,6 @@ class HSR:
                         else:
                             negVertList.append(V1)
 
-
         # uniq for python > 2.4
         #posVertList = [ u for u in posVertList if u not in locals()['_[1]'] ]
         #negVertList = [ u for u in negVertList if u not in locals()['_[1]'] ]
@@ -715,7 +715,6 @@ class HSR:
         posVertList = uniq(posVertList)
         negVertList = uniq(negVertList)
 
-
         # If vertex are all on the same half-space, return
         #if len(posVertList) < 3:
         #    print "Problem, we created a face with less that 3 vertices??"
@@ -745,16 +744,15 @@ class HSR:
         if len(posVertList) or len(negVertList):
 
             #newfaces = [posVertList] + [negVertList]
-            newfaces = ( [[ NMesh.Vert(v[0], v[1], v[2]) for v in posVertList]] +
-                    [[ NMesh.Vert(v[0], v[1], v[2]) for v in negVertList]] )
+            newfaces = ([[NMesh.Vert(v[0], v[1], v[2]) for v in posVertList]] +
+                    [[NMesh.Vert(v[0], v[1], v[2]) for v in negVertList]])
 
             for nf in newfaces:
-                if nf and len(nf)>2:
+                if nf and len(nf) > 2:
                     outfaces += HSR.makeFaces(nf)
 
         return outfaces
 
-
     addNewFaces = staticmethod(addNewFaces)
 
 
@@ -777,28 +775,27 @@ class MeshUtils:
         '''
 
         def sorted_edge_indicies(ed):
-            i1= ed.v1.index
-            i2= ed.v2.index
-            if i1>i2:
-                i1,i2= i2,i1
+            i1 = ed.v1.index
+            i2 = ed.v2.index
+            if i1 > i2:
+                i1, i2 = i2, i1
             return i1, i2
 
-
-        face_edges_dict= dict([(sorted_edge_indicies(ed), (ed.index, [])) for ed in me.edges])
+        face_edges_dict = dict([(sorted_edge_indicies(ed), (ed.index, [])) for ed in me.edges])
         for f in me.faces:
-            fvi= [v.index for v in f.v]# face vert idx's
+            fvi = [v.index for v in f.v]  # face vert idx's
             for i in xrange(len(f)):
-                i1= fvi[i]
-                i2= fvi[i-1]
+                i1 = fvi[i]
+                i2 = fvi[i - 1]
 
-                if i1>i2:
-                    i1,i2= i2,i1
+                if i1 > i2:
+                    i1, i2 = i2, i1
 
-                face_edges_dict[i1,i2][1].append(f)
+                face_edges_dict[i1, i2][1].append(f)
 
-        face_edges= [None] * len(me.edges)
+        face_edges = [None] * len(me.edges)
         for ed_index, ed_faces in face_edges_dict.itervalues():
-            face_edges[ed_index]= ed_faces
+            face_edges[ed_index] = ed_faces
 
         return face_edges
 
@@ -854,8 +851,8 @@ class ShadingUtils:
     def toonShadingMapSetup():
         levels = config.polygons['TOON_LEVELS']
 
-        texels = 2*levels - 1
-        tmp_shademap = [0.0] + [(i)/float(texels-1) for i in xrange(1, texels-1) ] + [1.0]
+        texels = 2 * levels - 1
+        tmp_shademap = [0.0] + [(i) / float(texels - 1) for i in xrange(1, texels - 1)] + [1.0]
 
         return tmp_shademap
 
@@ -867,13 +864,13 @@ class ShadingUtils:
             shademap = ShadingUtils.toonShadingMapSetup()
 
         v = 1.0
-        for i in xrange(0, len(shademap)-1):
-            pivot = (shademap[i]+shademap[i+1])/2.0
-            j = int(u>pivot)
+        for i in xrange(0, len(shademap) - 1):
+            pivot = (shademap[i] + shademap[i + 1]) / 2.0
+            j = int(u > pivot)
 
-            v = shademap[i+j]
+            v = shademap[i + j]
 
-            if v < shademap[i+1]:
+            if v < shademap[i + 1]:
                 return v
 
         return v
@@ -907,15 +904,14 @@ class Projector:
 
         camera = cameraObj.getData()
 
-        aspect = float(canvasRatio[0])/float(canvasRatio[1])
+        aspect = float(canvasRatio[0]) / float(canvasRatio[1])
         near = camera.clipStart
         far = camera.clipEnd
 
         scale = float(camera.scale)
 
-        fovy = atan(0.5/aspect/(camera.lens/32))
-        fovy = fovy * 360.0/pi
-
+        fovy = atan(0.5 / aspect / (camera.lens / 32))
+        fovy = fovy * 360.0 / pi
 
         if Blender.Get('version') < 243:
             camPersp = 0
@@ -930,7 +926,6 @@ class Projector:
         elif camera.type == camOrtho:
             mP = self._calcOrthoMatrix(fovy, aspect, near, far, scale)
 
-
         # View transformation
         cam = Matrix(cameraObj.getInverseMatrix())
         cam.transpose()
@@ -958,9 +953,9 @@ class Projector:
 
         # Perspective division
         if p[3] != 0:
-            p[0] = p[0]/p[3]
-            p[1] = p[1]/p[3]
-            p[2] = p[2]/p[3]
+            p[0] = p[0] / p[3]
+            p[1] = p[1] / p[3]
+            p[2] = p[2] / p[3]
 
         # restore the size
         p[3] = 1.0
@@ -968,7 +963,6 @@ class Projector:
 
         return p
 
-
     ##
     # Private methods
     #
@@ -979,14 +973,14 @@ class Projector:
 
         top = near * tan(fovy * pi / 360.0)
         bottom = -top
-        left = bottom*aspect
-        right= top*aspect
-        x = (2.0 * near) / (right-left)
-        y = (2.0 * near) / (top-bottom)
-        a = (right+left) / (right-left)
-        b = (top+bottom) / (top - bottom)
-        c = - ((far+near) / (far-near))
-        d = - ((2*far*near)/(far-near))
+        left = bottom * aspect
+        right = top * aspect
+        x = (2.0 * near) / (right - left)
+        y = (2.0 * near) / (top - bottom)
+        a = (right + left) / (right - left)
+        b = (top + bottom) / (top - bottom)
+        c = - ((far + near) / (far - near))
+        d = - ((2 * far * near) / (far - near))
 
         m = Matrix(
                 [x,   0.0,    a,    0.0],
@@ -996,7 +990,7 @@ class Projector:
 
         return m
 
-    def _calcOrthoMatrix(self, fovy, aspect , near, far, scale):
+    def _calcOrthoMatrix(self, fovy, aspect, near, far, scale):
         """Return an orthogonal projection matrix.
         """
 
@@ -1004,19 +998,19 @@ class Projector:
         top = near * tan(fovy * pi / 360.0) * (scale * 11)
         bottom = -top
         left = bottom * aspect
-        right= top * aspect
-        rl = right-left
-        tb = top-bottom
-        fn = near-far
-        tx = -((right+left)/rl)
-        ty = -((top+bottom)/tb)
-        tz = ((far+near)/fn)
+        right = top * aspect
+        rl = right - left
+        tb = top - bottom
+        fn = near - far
+        tx = -((right + left) / rl)
+        ty = -((top + bottom) / tb)
+        tz = ((far + near) / fn)
 
         m = Matrix(
-                [2.0/rl, 0.0,    0.0,     tx],
-                [0.0,    2.0/tb, 0.0,     ty],
-                [0.0,    0.0,    2.0/fn,  tz],
-                [0.0,    0.0,    0.0,    1.0])
+                [2.0 / rl, 0.0,      0.0,       tx],
+                [0.0,      2.0 / tb, 0.0,       ty],
+                [0.0,      0.0,      2.0 / fn,  tz],
+                [0.0,      0.0,      0.0,      1.0])
 
         return m
 
@@ -1069,7 +1063,7 @@ class Progress:
             return False
 
         self.completed += 1
-        self.progress = ( float(self.completed) / float(self.steps) ) * 100
+        self.progress = (float(self.completed) / float(self.steps)) * 100
         self.progress = int(self.progress)
 
         return True
@@ -1143,15 +1137,15 @@ class ConsoleProgressIndicator(ProgressIndicator):
         ProgressIndicator.show(self, progress, name)
 
         bar_length = 70
-        bar_progress = int( (progress/100.0) * bar_length )
+        bar_progress = int((progress / 100.0) * bar_length)
         bar = ("=" * bar_progress).ljust(bar_length)
 
-        self.swirl_count = (self.swirl_count+1)%len(self.swirl_chars)
+        self.swirl_count = (self.swirl_count + 1) % len(self.swirl_chars)
         swirl_char = self.swirl_chars[self.swirl_count]
 
         progress_bar = "%s |%s| %c %3d%%" % (name, bar, swirl_char, progress)
 
-        sys.stderr.write(progress_bar+"\r")
+        sys.stderr.write(progress_bar + "\r")
         if progress == 100:
             sys.stderr.write("\n")
 
@@ -1172,21 +1166,19 @@ class GraphicalProgressIndicator(ProgressIndicator):
     def show(self, progress, name):
         ProgressIndicator.show(self, progress)
 
-        self.swirl_count = (self.swirl_count+1)%len(self.swirl_chars)
+        self.swirl_count = (self.swirl_count + 1) % len(self.swirl_chars)
         swirl_char = self.swirl_chars[self.swirl_count]
 
         progress_text = "%s - %c %3d%%" % (name, swirl_char, progress)
 
         # Finally draw  the Progress Bar
-        Window.WaitCursor(1) # Maybe we can move that call in the constructor?
-        Window.DrawProgressBar(progress/100.0, progress_text)
+        Window.WaitCursor(1)  # Maybe we can move that call in the constructor?
+        Window.DrawProgressBar(progress / 100.0, progress_text)
 
         if progress == 100:
             Window.DrawProgressBar(1, progress_text)
             Window.WaitCursor(0)
 
-
-
 # ---------------------------------------------------------------------
 #
 ## 2D Object representation class
@@ -1232,7 +1224,7 @@ class VectorWriter:
         self.outputFileName = fileName
 
         context = Scene.GetCurrent().getRenderingContext()
-        self.canvasSize = ( context.imageSizeX(), context.imageSizeY() )
+        self.canvasSize = (context.imageSizeX(), context.imageSizeY())
 
         self.fps = context.fps
 
@@ -1240,7 +1232,6 @@ class VectorWriter:
         self.endFrame = 1
         self.animation = False
 
-
     ##
     # Public Methods
     #
@@ -1278,7 +1269,6 @@ class SVGVectorWriter(VectorWriter):
 
         self.file = None
 
-
     ##
     # Public Methods
     #
@@ -1303,7 +1293,6 @@ class SVGVectorWriter(VectorWriter):
         # remember to call the close method of the parent as last
         VectorWriter.close(self)
 
-
     def printCanvas(self, scene, doPrintPolygons=True, doPrintEdges=False,
             showHiddenEdges=False):
         """Convert the scene representation to SVG.
@@ -1321,12 +1310,11 @@ class SVGVectorWriter(VectorWriter):
 
         # Assign an id to this group so we can set properties on it using DOM
         self.file.write("<g id=\"frame%d\" style=\"%s\">\n" %
-                (framenumber, framestyle) )
-
+                (framenumber, framestyle))
 
         for obj in Objects:
 
-            if(obj.getType() != 'Mesh'):
+            if obj.getType() != 'Mesh':
                 continue
 
             self.file.write("<g id=\"%s\">\n" % obj.getName())
@@ -1343,7 +1331,6 @@ class SVGVectorWriter(VectorWriter):
 
         self.file.write("</g>\n")
 
-
     ##
     # Private Methods
     #
@@ -1354,12 +1341,12 @@ class SVGVectorWriter(VectorWriter):
 
         pt = Vector([0, 0, 0])
 
-        mW = float(self.canvasSize[0])/2.0
-        mH = float(self.canvasSize[1])/2.0
+        mW = float(self.canvasSize[0]) / 2.0
+        mH = float(self.canvasSize[1]) / 2.0
 
         # rescale to canvas size
-        pt[0] = v.co[0]*mW + mW
-        pt[1] = v.co[1]*mH + mH
+        pt[0] = v.co[0] * mW + mW
+        pt[1] = v.co[1] * mH + mH
         pt[2] = v.co[2]
 
         # For now we want (0,0) in the top-left corner of the canvas.
@@ -1381,7 +1368,7 @@ class SVGVectorWriter(VectorWriter):
                 self.canvasSize)
 
         if self.animation:
-            delay = 1000/self.fps
+            delay = 1000 / self.fps
 
             self.file.write("""\n<script type="text/javascript"><![CDATA[
             globalStartFrame=%d;
@@ -1389,7 +1376,7 @@ class SVGVectorWriter(VectorWriter):
 
             timerID = setInterval("NextFrame()", %d);
             globalFrameCounter=%d;
-            \n""" % (self.startFrame, self.endFrame, delay, self.startFrame) )
+            \n""" % (self.startFrame, self.endFrame, delay, self.startFrame))
 
             self.file.write("""\n
             function NextFrame()
@@ -1435,7 +1422,7 @@ class SVGVectorWriter(VectorWriter):
 
         for face in mesh.faces:
             if not face.sel:
-               continue
+                continue
 
             self.file.write("<path d=\"")
 
@@ -1464,7 +1451,7 @@ class SVGVectorWriter(VectorWriter):
             # Handle transparent polygons
             opacity_string = ""
             if color[3] != 255:
-                opacity = float(color[3])/255.0
+                opacity = float(color[3]) / 255.0
                 opacity_string = " fill-opacity: %g; stroke-opacity: %g; opacity: 1;" % (opacity, opacity)
                 #opacity_string = "opacity: %g;" % (opacity)
 
@@ -1510,9 +1497,9 @@ class SVGVectorWriter(VectorWriter):
             p2 = self._calcCanvasCoord(e.v2)
 
             self.file.write("<line x1=\"%g\" y1=\"%g\" x2=\"%g\" y2=\"%g\"\n"
-                    % ( p1[0], p1[1], p2[0], p2[1] ) )
-            self.file.write(" style=\"stroke:rgb("+str(stroke_col[0])+","+str(stroke_col[1])+","+str(stroke_col[2])+");")
-            self.file.write(" stroke-width:"+str(stroke_width)+";\n")
+                    % (p1[0], p1[1], p2[0], p2[1]))
+            self.file.write(" style=\"stroke:rgb(" + str(stroke_col[0]) + "," + str(stroke_col[1]) + "," + str(stroke_col[2]) + ");")
+            self.file.write(" stroke-width:" + str(stroke_width) + ";\n")
             self.file.write(" stroke-linecap:round;stroke-linejoin:round")
             self.file.write(hidden_stroke_style)
             self.file.write("\"/>\n")
@@ -1528,6 +1515,7 @@ try:
 except:
     SWFSupported = False
 
+
 class SWFVectorWriter(VectorWriter):
     """A concrete class for writing SWF output.
     """
@@ -1540,7 +1528,6 @@ class SWFVectorWriter(VectorWriter):
         self.movie = None
         self.sprite = None
 
-
     ##
     # Public Methods
     #
@@ -1598,7 +1585,6 @@ class SWFVectorWriter(VectorWriter):
         if self.animation:
             self.movie.nextFrame()
 
-
     ##
     # Private Methods
     #
@@ -1609,12 +1595,12 @@ class SWFVectorWriter(VectorWriter):
 
         pt = Vector([0, 0, 0])
 
-        mW = float(self.canvasSize[0])/2.0
-        mH = float(self.canvasSize[1])/2.0
+        mW = float(self.canvasSize[0]) / 2.0
+        mH = float(self.canvasSize[1]) / 2.0
 
         # rescale to canvas size
-        pt[0] = v.co[0]*mW + mW
-        pt[1] = v.co[1]*mH + mH
+        pt[0] = v.co[0] * mW + mW
+        pt[1] = v.co[1] * mH + mH
         pt[2] = v.co[2]
 
         # For now we want (0,0) in the top-left corner of the canvas.
@@ -1633,7 +1619,7 @@ class SWFVectorWriter(VectorWriter):
 
         for face in mesh.faces:
             if not face.sel:
-               continue
+                continue
 
             if face.col:
                 fcol = face.col[0]
@@ -1659,7 +1645,6 @@ class SWFVectorWriter(VectorWriter):
             s.end()
             sprite.add(s)
 
-
     def _printEdges(self, mesh, sprite, showHiddenEdges=False):
         """Print the wireframe using mesh edges.
         """
@@ -1681,7 +1666,7 @@ class SWFVectorWriter(VectorWriter):
                 else:
                     # SWF does not support dashed lines natively, so -for now-
                     # draw hidden lines thinner and half-trasparent
-                    s.setLine(stroke_width/2, stroke_col[0], stroke_col[1],
+                    s.setLine(stroke_width / 2, stroke_col[0], stroke_col[1],
                             stroke_col[2], 128)
 
             p1 = self._calcCanvasCoord(e.v1)
@@ -1702,6 +1687,7 @@ try:
 except:
     PDFSupported = False
 
+
 class PDFVectorWriter(VectorWriter):
     """A concrete class for writing PDF output.
     """
@@ -1713,7 +1699,6 @@ class PDFVectorWriter(VectorWriter):
 
         self.canvas = None
 
-
     ##
     # Public Methods
     #
@@ -1767,12 +1752,12 @@ class PDFVectorWriter(VectorWriter):
 
         pt = Vector([0, 0, 0])
 
-        mW = float(self.canvasSize[0])/2.0
-        mH = float(self.canvasSize[1])/2.0
+        mW = float(self.canvasSize[0]) / 2.0
+        mH = float(self.canvasSize[1]) / 2.0
 
         # rescale to canvas size
-        pt[0] = v.co[0]*mW + mW
-        pt[1] = v.co[1]*mH + mH
+        pt[0] = v.co[0] * mW + mW
+        pt[1] = v.co[1] * mH + mH
         pt[2] = v.co[2]
 
         # For now we want (0,0) in the top-left corner of the canvas.
@@ -1791,12 +1776,12 @@ class PDFVectorWriter(VectorWriter):
 
         for face in mesh.faces:
             if not face.sel:
-               continue
+                continue
 
             if face.col:
                 fcol = face.col[0]
-                color = [fcol.r/255.0, fcol.g/255.0, fcol.b/255.0,
-                        fcol.a/255.0]
+                color = [fcol.r / 255.0, fcol.g / 255.0, fcol.b / 255.0,
+                        fcol.a / 255.0]
             else:
                 color = [1, 1, 1, 1]
 
@@ -1829,8 +1814,8 @@ class PDFVectorWriter(VectorWriter):
         self.canvas.setLineCap(1)
         self.canvas.setLineJoin(1)
         self.canvas.setLineWidth(stroke_width)
-        self.canvas.setStrokeColorRGB(stroke_col[0]/255.0, stroke_col[1]/255.0,
-            stroke_col[2]/255)
+        self.canvas.setStrokeColorRGB(stroke_col[0] / 255.0, stroke_col[1] / 255.0,
+            stroke_col[2] / 255)
 
         for e in mesh.edges:
 
@@ -1842,15 +1827,13 @@ class PDFVectorWriter(VectorWriter):
                 else:
                     # PDF does not support dashed lines natively, so -for now-
                     # draw hidden lines thinner
-                    self.canvas.setLineWidth(stroke_width/2.0)
+                    self.canvas.setLineWidth(stroke_width / 2.0)
 
             p1 = self._calcCanvasCoord(e.v1)
             p2 = self._calcCanvasCoord(e.v2)
 
             self.canvas.line(p1[0], p1[1], p2[0], p2[1])
 
-
-
 # ---------------------------------------------------------------------
 #
 ## Rendering Classes
@@ -1898,8 +1881,8 @@ class Renderer:
         # Use the aspect ratio of the scene rendering context
         context = self._SCENE.getRenderingContext()
 
-        aspect_ratio = float(context.imageSizeX())/float(context.imageSizeY())
-        self.canvasRatio = (float(context.aspectRatioX())*aspect_ratio,
+        aspect_ratio = float(context.imageSizeX()) / float(context.imageSizeY())
+        self.canvasRatio = (float(context.aspectRatioX()) * aspect_ratio,
                             float(context.aspectRatioY())
                             )
 
@@ -1908,7 +1891,6 @@ class Renderer:
 
         self.lights = []
 
-
     ##
     # Public Methods
     #
@@ -1936,13 +1918,13 @@ class Renderer:
             outputWriter.open(startFrame, endFrame)
 
         # Do the rendering process frame by frame
-        print "Start Rendering of %d frames" % (endFrame-startFrame+1)
-        for f in xrange(startFrame, endFrame+1):
+        print "Start Rendering of %d frames" % (endFrame - startFrame + 1)
+        for f in xrange(startFrame, endFrame + 1):
             print "\n\nFrame: %d" % f
 
             # FIXME To get the correct camera position we have to use +1 here.
             # Is there a bug somewhere in the Scene module?
-            context.currentFrame(f+1)
+            context.currentFrame(f + 1)
             self.cameraObj = self._SCENE.objects.camera
 
             # Use some temporary workspace, a full copy of the scene
@@ -1952,7 +1934,6 @@ class Renderer:
             ctx = inputScene.getRenderingContext()
             ctx.currentFrame(f)
 
-
             # Get a projector for this camera.
             # NOTE: the projector wants object in world coordinates,
             # so we should remember to apply modelview transformations
@@ -1961,7 +1942,7 @@ class Renderer:
 
             try:
                 renderedScene = self.doRenderScene(inputScene)
-            except :
+            except:
                 print "There was an error! Aborting."
                 import traceback
                 print traceback.print_exc()
@@ -1972,9 +1953,9 @@ class Renderer:
                 return
 
             outputWriter.printCanvas(renderedScene,
-                    doPrintPolygons = config.polygons['SHOW'],
-                    doPrintEdges    = config.edges['SHOW'],
-                    showHiddenEdges = config.edges['SHOW_HIDDEN'])
+                    doPrintPolygons=config.polygons['SHOW'],
+                    doPrintEdges=config.edges['SHOW'],
+                    showHiddenEdges=config.edges['SHOW_HIDDEN'])
 
             # delete the rendered scene
             self._SCENE.makeCurrent()
@@ -1985,7 +1966,6 @@ class Renderer:
         print "Done!"
         context.currentFrame(origCurrentFrame)
 
-
     def doRenderScene(self, workScene):
         """Control the rendering process.
 
@@ -2013,7 +1993,7 @@ class Renderer:
         Objects = workScene.objects
 
         print "Total Objects: %d" % len(Objects)
-        for i,obj in enumerate(Objects):
+        for i, obj in enumerate(Objects):
             print "\n\n-------"
             print "Rendering Object: %d" % i
 
@@ -2029,12 +2009,11 @@ class Renderer:
 
             self._doBackFaceCulling(mesh)
 
-
             # When doing HSR with NEWELL we may want to flip all normals
             # toward the viewer
             if config.polygons['HSR'] == "NEWELL":
                 for f in mesh.faces:
-                    f.sel = 1-f.sel
+                    f.sel = 1 - f.sel
                 mesh.flipNormals()
                 for f in mesh.faces:
                     f.sel = 1
@@ -2056,7 +2035,6 @@ class Renderer:
 
         return workScene
 
-
     ##
     # Private Methods
     #
@@ -2073,7 +2051,6 @@ class Renderer:
         """
         return Vector(self.cameraObj.matrix[2]).resize3D()
 
-
     # Faces methods
 
     def _isFaceVisible(self, face):
@@ -2109,10 +2086,9 @@ class Renderer:
         # the difference between the camera position and one point of
         # the face, we choose the farthest point from the camera.
         if self.cameraObj.data.getType() == 0:
-            vv = max( [ ((camPos - Vector(v.co)).length, (camPos - Vector(v.co))) for v in face] )
+            vv = max([((camPos - Vector(v.co)).length, (camPos - Vector(v.co))) for v in face])
             view_vect = vv[1]
 
-
         # if d > 0 the face is visible from the camera
         d = view_vect * normal
 
@@ -2121,7 +2097,6 @@ class Renderer:
         else:
             return False
 
-
     # Scene methods
 
     def _filterHiddenObjects(self, scene):
@@ -2130,8 +2105,8 @@ class Renderer:
 
         Objects = scene.objects
 
-        visible_obj_list = [ obj for obj in Objects if
-                set(obj.layers).intersection(set(scene.getLayers())) ]
+        visible_obj_list = [obj for obj in Objects if
+                set(obj.layers).intersection(set(scene.getLayers()))]
 
         for o in Objects:
             if o not in visible_obj_list:
@@ -2139,12 +2114,10 @@ class Renderer:
 
         scene.update()
 
-
-
     def _buildLightSetup(self, scene):
         # Get the list of lighting sources
         obj_lst = scene.objects
-        self.lights = [ o for o in obj_lst if o.getType() == 'Lamp' ]
+        self.lights = [o for o in obj_lst if o.getType() == 'Lamp']
 
         # When there are no lights we use a default lighting source
         # that have the same position of the camera
@@ -2155,7 +2128,6 @@ class Renderer:
             lobj.link(l)
             self.lights.append(lobj)
 
-
     def _doSceneClipping(self, scene):
         """Clip whole objects against the View Frustum.
 
@@ -2166,16 +2138,17 @@ class Renderer:
         view_vect = self._cameraViewVector()
 
         near = self.cameraObj.data.clipStart
-        far  = self.cameraObj.data.clipEnd
+        far = self.cameraObj.data.clipEnd
 
-        aspect = float(self.canvasRatio[0])/float(self.canvasRatio[1])
-        fovy = atan(0.5/aspect/(self.cameraObj.data.lens/32))
-        fovy = fovy * 360.0/pi
+        aspect = float(self.canvasRatio[0]) / float(self.canvasRatio[1])
+        fovy = atan(0.5 / aspect / (self.cameraObj.data.lens / 32))
+        fovy = fovy * 360.0 / pi
 
         Objects = scene.objects
 
         for o in Objects:
-            if o.getType() != 'Mesh': continue;
+            if o.getType() != 'Mesh':
+                continue
 
             """
             obj_vect = Vector(cam_pos) - self._getObjPosition(o)
@@ -2209,8 +2182,6 @@ class Renderer:
             if points_outside == len(bb):
                 scene.objects.unlink(o)
 
-
-
     def _doConvertGeometricObjsToMesh(self, scene):
         """Convert all "geometric" objects to mesh ones.
         """
@@ -2219,27 +2190,29 @@ class Renderer:
 
         Objects = scene.objects
 
-        objList = [ o for o in Objects if o.getType() in geometricObjTypes ]
+        objList = [o for o in Objects if o.getType() in geometricObjTypes]
         for obj in objList:
             old_obj = obj
             obj = self._convertToRawMeshObj(obj)
             scene.objects.link(obj)
             scene.objects.unlink(old_obj)
 
-
             # XXX Workaround for Text and Curve which have some normals
             # inverted when they are converted to Mesh, REMOVE that when
             # blender will fix that!!
             if old_obj.getType() in ['Curve', 'Text']:
                 me = obj.getData(mesh=1)
-                for f in me.faces: f.sel = 1;
-                for v in me.verts: v.sel = 1;
+
+                for f in me.faces:
+                    f.sel = 1
+                for v in me.verts:
+                    v.sel = 1
+
                 me.remDoubles(0)
                 me.triangleToQuad()
                 me.recalcNormals()
                 me.update()
 
-
     def _doSceneDepthSorting(self, scene):
         """Sort objects in the scene.
 
@@ -2258,12 +2231,11 @@ class Renderer:
         # nearest to the camera should be drawn as last.
         by_nearest_bbox_point = (lambda o1, o2:
                 (o1.getType() == 'Mesh' and o2.getType() == 'Mesh') and
-                cmp( min( [(Vector(p) - Vector(c)).length for p in o1.getBoundBox()] ),
-                     min( [(Vector(p) - Vector(c)).length for p in o2.getBoundBox()] )
+                cmp(min([(Vector(p) - Vector(c)).length for p in o1.getBoundBox()]),
+                    min([(Vector(p) - Vector(c)).length for p in o2.getBoundBox()])
                 )
             )
 
-
         Objects = list(scene.objects)
 
         #Objects.sort(by_obj_center_pos)
@@ -2278,7 +2250,7 @@ class Renderer:
         """Merge all the Mesh Objects in a scene into a single Mesh Object.
         """
 
-        oList = [o for o in scene.objects if o.getType()=='Mesh']
+        oList = [o for o in scene.objects if o.getType() == 'Mesh']
 
         # FIXME: Object.join() do not work if the list contains 1 object
         if len(oList) == 1:
@@ -2304,16 +2276,15 @@ class Renderer:
 
         scene.update()
 
-
     # Per object/mesh methods
 
     def _convertToRawMeshObj(self, object):
         """Convert geometry based object to a mesh object.
         """
-        me = Mesh.New('RawMesh_'+object.name)
+        me = Mesh.New('RawMesh_' + object.name)
         me.getFromObject(object.name)
 
-        newObject = Object.New('Mesh', 'RawMesh_'+object.name)
+        newObject = Object.New('Mesh', 'RawMesh_' + object.name)
         newObject.link(me)
 
         # If the object has no materials set a default material
@@ -2395,7 +2366,7 @@ class Renderer:
             elif mat.getMode() & Material.Modes['SHADELESS']:
                 I = mat.getRGBCol()
                 # Convert to a value between 0 and 255
-                tmp_col = [ int(c * 255.0) for c in I]
+                tmp_col = [int(c * 255.0) for c in I]
 
                 for c in f.col:
                     c.r = tmp_col[0]
@@ -2405,7 +2376,6 @@ class Renderer:
 
                 continue
 
-
             # do vertex color calculation
 
             TotDiffSpec = Vector([0.0, 0.0, 0.0])
@@ -2422,12 +2392,12 @@ class Renderer:
                 N = Vector(f.no).normalize()
 
                 if config.polygons['SHADING'] == 'TOON':
-                    NL = ShadingUtils.toonShading(N*L)
+                    NL = ShadingUtils.toonShading(N * L)
                 else:
-                    NL = (N*L)
+                    NL = (N * L)
 
                 # Should we use NL instead of (N*L) here?
-                R = 2 * (N*L) * N - L
+                R = 2 * (N * L) * N - L
 
                 Ip = light.getEnergy()
 
@@ -2438,36 +2408,33 @@ class Renderer:
 
                 Idiff = Ip * kd * max(0, NL)
 
-
                 # Specular component
                 ks = mat.getSpec() * Vector(mat.getSpecCol())
                 ns = mat.getHardness()
-                Ispec = Ip * ks * pow(max(0, (V*R)), ns)
-
-                TotDiffSpec += (Idiff+Ispec)
+                Ispec = Ip * ks * pow(max(0, (V * R)), ns)
 
+                TotDiffSpec += (Idiff + Ispec)
 
             # Ambient component
             Iamb = Vector(Blender.World.Get()[0].getAmb())
             ka = mat.getAmb()
 
             # Emissive component (convert to a triplet)
-            ki = Vector([mat.getEmit()]*3)
+            ki = Vector([mat.getEmit()] * 3)
 
             #I = ki + Iamb + (Idiff + Ispec)
             I = ki + (ka * Iamb) + TotDiffSpec
 
-
             # Set Alpha component
             I = list(I)
             I.append(mat.getAlpha())
 
             # Clamp I values between 0 and 1
-            I = [ min(c, 1) for c in I]
-            I = [ max(0, c) for c in I]
+            I = [min(c, 1) for c in I]
+            I = [max(0, c) for c in I]
 
             # Convert to a value between 0 and 255
-            tmp_col = [ int(c * 255.0) for c in I]
+            tmp_col = [int(c * 255.0) for c in I]
 
             for c in f.col:
                 c.r = tmp_col[0]
@@ -2546,7 +2513,7 @@ class Renderer:
                     # TODO: Do this test before, it is more efficient
                     points_outside = 0
                     for v in f:
-                        if abs(v[0]) > 1-EPS or abs(v[1]) > 1-EPS or abs(v[2]) > 1-EPS:
+                        if abs(v[0]) > (1 - EPS) or abs(v[1]) > (1 - EPS) or abs(v[2]) > (1 - EPS):
                             points_outside += 1
 
                     if points_outside != len(f):
@@ -2563,11 +2530,9 @@ class Renderer:
                         clippedfaces.append(nf)
             facelist = clippedfaces[:]
 
-
         nmesh.faces = facelist
         nmesh.update()
 
-
     # HSR routines
     def __simpleDepthSort(self, mesh):
         """Sort faces by the furthest vertex.
@@ -2580,10 +2545,10 @@ class Renderer:
 
         # The sorting requires circa n*log(n) steps
         n = len(mesh.faces)
-        progress.setActivity("HSR: Painter", n*log(n))
+        progress.setActivity("HSR: Painter", n * log(n))
 
         by_furthest_z = (lambda f1, f2: progress.update() and
-                cmp(max([v.co[2] for v in f1]), max([v.co[2] for v in f2])+EPS)
+                cmp(max([v.co[2] for v in f1]), max([v.co[2] for v in f2]) + EPS)
                 )
 
         # FIXME: using NMesh to sort faces. We should avoid that!
@@ -2595,7 +2560,6 @@ class Renderer:
 
         nmesh.update()
 
-
     def __newellDepthSort(self, mesh):
         """Newell's depth sorting.
 
@@ -2610,7 +2574,6 @@ class Renderer:
         #        print "NON QUAD??"
         #        f.sel = 1
 
-
         # Now reselect all faces
         for f in mesh.faces:
             f.sel = 1
@@ -2632,13 +2595,11 @@ class Renderer:
         facelist = nmesh.faces[:]
         maplist = []
 
-
         # The steps are _at_least_ equal to len(facelist), we do not count the
         # feces coming out from splitting!!
         progress.setActivity("HSR: Newell", len(facelist))
         #progress.setQuiet(True)
 
-
         while len(facelist):
             debug("\n----------------------\n")
             debug("len(facelits): %d\n" % len(facelist))
@@ -2680,31 +2641,28 @@ class Renderer:
                         debug("met a marked face\n")
                         continue
 
-
                 # Test 1: X extent overlapping
                 xP = [v.co[0] for v in P.v]
                 xQ = [v.co[0] for v in Q.v]
                 #notXOverlap = (max(xP) <= min(xQ)) or (max(xQ) <= min(xP))
-                notXOverlap = (min(xQ) >= max(xP)-EPS) or (min(xP) >= max(xQ)-EPS)
+                notXOverlap = min(xQ) >= (max(xP) - EPS) or min(xP) >= (max(xQ) - EPS)
 
                 if notXOverlap:
                     debug("\nTest 1\n")
                     debug("NOT X OVERLAP!\n")
                     continue
 
-
                 # Test 2: Y extent Overlapping
                 yP = [v.co[1] for v in P.v]
                 yQ = [v.co[1] for v in Q.v]
-                #notYOverlap = (max(yP) <= min(yQ)) or (max(yQ) <= min(yP))
-                notYOverlap = (min(yQ) >= max(yP)-EPS) or (min(yP) >= max(yQ)-EPS)
+                #notYOverlap = max(yP) <= min(yQ) or max(yQ) <= min(yP)
+                notYOverlap = min(yQ) >= (max(yP) - EPS) or min(yP) >= (max(yQ) - EPS)
 
                 if notYOverlap:
                     debug("\nTest 2\n")
                     debug("NOT Y OVERLAP!\n")
                     continue
 
-
                 # Test 3: P vertices are all behind the plane of Q
                 n = 0
                 for Pi in P:
@@ -2718,7 +2676,6 @@ class Renderer:
                     debug("P BEHIND Q!\n")
                     continue
 
-
                 # Test 4: Q vertices in front of the plane of P
                 n = 0
                 for Qi in Q:
@@ -2732,12 +2689,11 @@ class Renderer:
                     debug("Q IN FRONT OF P!\n")
                     continue
 
-
                 # Test 5: Check if projections of polygons effectively overlap,
                 # in previous tests we checked only bounding boxes.
 
                 #if not projectionsOverlap(P, Q):
-                if not ( HSR.projectionsOverlap(P, Q) or HSR.projectionsOverlap(Q, P)):
+                if not (HSR.projectionsOverlap(P, Q) or HSR.projectionsOverlap(Q, P)):
                     debug("\nTest 5\n")
                     debug("Projections do not overlap!\n")
                     continue
@@ -2757,7 +2713,6 @@ class Renderer:
 
                 # The question now is: Does Q obscure P?
 
-
                 # Test 3bis: Q vertices are all behind the plane of P
                 n = 0
                 for Qi in Q:
@@ -2770,7 +2725,6 @@ class Renderer:
                     debug("\nTest 3bis\n")
                     debug("Q BEHIND P!\n")
 
-
                 # Test 4bis: P vertices in front of the plane of Q
                 n = 0
                 for Pi in P:
@@ -2783,7 +2737,6 @@ class Renderer:
                     debug("\nTest 4bis\n")
                     debug("P IN FRONT OF Q!\n")
 
-
                 # We don't even know if Q does obscure P, so they should
                 # intersect each other, split one of them in two parts.
                 if not qVerticesBehindPlaneP and not pVerticesInFrontPlaneQ:
@@ -2806,14 +2759,13 @@ class Renderer:
             if split_done == 0 and face_marked == 0:
                 facelist.remove(P)
                 maplist.append(P)
-                dumpfaces(maplist, "dump"+str(len(maplist)).zfill(4)+".svg")
+                dumpfaces(maplist, "dump" + str(len(maplist)).zfill(4) + ".svg")
 
                 progress.update()
 
             if len(facelist) == 870:
                 dumpfaces([P, Q], "loopdebug.svg")
 
-
             #if facelist == None:
             #    maplist = [P, Q]
             #    print [v.co for v in P]
@@ -2822,14 +2774,12 @@ class Renderer:
 
             # end of while len(facelist)
 
-
         nmesh.faces = maplist
         #for f in nmesh.faces:
         #    f.sel = 1
 
         nmesh.update()
 
-
     def _doHiddenSurfaceRemoval(self, mesh):
         """Do HSR for the given mesh.
         """
@@ -2844,7 +2794,6 @@ class Renderer:
             print "\nUsing the Newell's algorithm for HSR."
             self.__newellDepthSort(mesh)
 
-
     def _doEdgesStyle(self, mesh, edgestyleSelect):
         """Process Mesh Edges accroding to a given selection style.
 
@@ -2863,7 +2812,7 @@ class Renderer:
 
         edge_cache = MeshUtils.buildEdgeFaceUsersCache(mesh)
 
-        for i,edge_faces in enumerate(edge_cache):
+        for i, edge_faces in enumerate(edge_cache):
             mesh.edges[i].sel = 0
             if edgestyleSelect(edge_faces):
                 mesh.edges[i].sel = 1
@@ -2884,17 +2833,17 @@ class Renderer:
 #
 # ---------------------------------------------------------------------
 
-
 from Blender import BGL, Draw
 from Blender.BGL import *
 
+
 class GUI:
 
     def _init():
 
         # Output Format menu
         output_format = config.output['FORMAT']
-        default_value = outputWriters.keys().index(output_format)+1
+        default_value = outputWriters.keys().index(output_format) + 1
         GUI.outFormatMenu = Draw.Create(default_value)
         GUI.evtOutFormatMenu = 0
 
@@ -2911,7 +2860,7 @@ class GUI:
 
         # Shading Style menu
         shading_style = config.polygons['SHADING']
-        default_value = shadingStyles.keys().index(shading_style)+1
+        default_value = shadingStyles.keys().index(shading_style) + 1
         GUI.shadingStyleMenu = Draw.Create(default_value)
         GUI.evtShadingStyleMenu = 21
 
@@ -2928,7 +2877,7 @@ class GUI:
 
         # Edge Style menu
         edge_style = config.edges['STYLE']
-        default_value = edgeStyles.keys().index(edge_style)+1
+        default_value = edgeStyles.keys().index(edge_style) + 1
         GUI.edgeStyleMenu = Draw.Create(default_value)
         GUI.evtEdgeStyleMenu = 6
 
@@ -2938,7 +2887,7 @@ class GUI:
 
         # Edge Color Picker
         c = config.edges['COLOR']
-        GUI.edgeColorPicker = Draw.Create(c[0]/255.0, c[1]/255.0, c[2]/255.0)
+        GUI.edgeColorPicker = Draw.Create(c[0] / 255.0, c[1] / 255.0, c[2] / 255.0)
         GUI.evtEdgeColorPicker = 71
 
         # Render Button
@@ -2961,7 +2910,7 @@ class GUI:
         Draw.Text("VRM: Vector Rendering Method script. Version %s." %
                 __version__)
         glRasterPos2i(10, 365)
-        Draw.Text("%s (c) 2006, 2007" % __author__)
+        Draw.Text("%s (c) 2012" % __author__)
 
         glRasterPos2i(10, 335)
         Draw.Text("Press Q or ESC to quit.")
@@ -2971,26 +2920,26 @@ class GUI:
         Draw.Text("Select the output Format:")
         outMenuStruct = "Output Format %t"
         for t in outputWriters.keys():
-           outMenuStruct = outMenuStruct + "|%s" % t
+            outMenuStruct = outMenuStruct + "|%s" % t
         GUI.outFormatMenu = Draw.Menu(outMenuStruct, GUI.evtOutFormatMenu,
-                10, 285, 160, 18, GUI.outFormatMenu.val, "Choose the Output Format")
+            10, 285, 160, 18, GUI.outFormatMenu.val, "Choose the Output Format")
 
         # Animation toggle
         GUI.animToggle = Draw.Toggle("Animation", GUI.evtAnimToggle,
-                10, 260, 160, 18, GUI.animToggle.val,
-                "Toggle rendering of animations")
+            10, 260, 160, 18, GUI.animToggle.val,
+            "Toggle rendering of animations")
 
         # Join Objects toggle
         GUI.joinObjsToggle = Draw.Toggle("Join objects", GUI.evtJoinObjsToggle,
-                10, 235, 160, 18, GUI.joinObjsToggle.val,
-                "Join objects in the rendered file")
+            10, 235, 160, 18, GUI.joinObjsToggle.val,
+            "Join objects in the rendered file")
 
         # Render Button
-        Draw.Button("Render", GUI.evtRenderButton, 10, 210-25, 75, 25+18,
-                "Start Rendering")
-        Draw.Button("Exit", GUI.evtExitButton, 95, 210-25, 75, 25+18, "Exit!")
+        Draw.Button("Render", GUI.evtRenderButton, 10, 210 - 25, 75, 25 + 18,
+            "Start Rendering")
+        Draw.Button("Exit", GUI.evtExitButton, 95, 210 - 25, 75, 25 + 18, "Exit!")
 
-        Draw.Button("Save settings as default", GUI.evtSaveDefaultButton, 10, 210-50, 160, 18,
+        Draw.Button("Save settings as default", GUI.evtSaveDefaultButton, 10, 210 - 50, 160, 18,
             "Save settings as default")
 
         # Rendering Styles
@@ -2999,8 +2948,8 @@ class GUI:
 
         # Render Polygons
         GUI.polygonsToggle = Draw.Toggle("Filled Polygons", GUI.evtPolygonsToggle,
-                200, 285, 160, 18, GUI.polygonsToggle.val,
-                "Render filled polygons")
+            200, 285, 160, 18, GUI.polygonsToggle.val,
+            "Render filled polygons")
 
         if GUI.polygonsToggle.val == 1:
 
@@ -3009,14 +2958,13 @@ class GUI:
             for t in shadingStyles.keys():
                 shadingStyleMenuStruct = shadingStyleMenuStruct + "|%s" % t.lower()
             GUI.shadingStyleMenu = Draw.Menu(shadingStyleMenuStruct, GUI.evtShadingStyleMenu,
-                    200, 260, 160, 18, GUI.shadingStyleMenu.val,
-                    "Choose the shading style")
-
+                200, 260, 160, 18, GUI.shadingStyleMenu.val,
+                "Choose the shading style")
 
         # Render Edges
         GUI.showEdgesToggle = Draw.Toggle("Show Edges", GUI.evtShowEdgesToggle,
-                200, 235, 160, 18, GUI.showEdgesToggle.val,
-                "Render polygon edges")
+            200, 235, 160, 18, GUI.showEdgesToggle.val,
+            "Render polygon edges")
 
         if GUI.showEdgesToggle.val == 1:
 
@@ -3025,24 +2973,23 @@ class GUI:
             for t in edgeStyles.keys():
                 edgeStyleMenuStruct = edgeStyleMenuStruct + "|%s" % t.lower()
             GUI.edgeStyleMenu = Draw.Menu(edgeStyleMenuStruct, GUI.evtEdgeStyleMenu,
-                    200, 210, 160, 18, GUI.edgeStyleMenu.val,
-                    "Choose the edge style")
+                200, 210, 160, 18, GUI.edgeStyleMenu.val,
+                "Choose the edge style")
 
             # Edge size
             GUI.edgeWidthSlider = Draw.Slider("Width: ", GUI.evtEdgeWidthSlider,
-                    200, 185, 140, 18, GUI.edgeWidthSlider.val,
-                    0.0, 10.0, 0, "Change Edge Width")
+                200, 185, 140, 18, GUI.edgeWidthSlider.val,
+                0.0, 10.0, 0, "Change Edge Width")
 
             # Edge Color
             GUI.edgeColorPicker = Draw.ColorPicker(GUI.evtEdgeColorPicker,
-                    342, 185, 18, 18, GUI.edgeColorPicker.val, "Choose Edge Color")
+                342, 185, 18, 18, GUI.edgeColorPicker.val, "Choose Edge Color")
 
             # Show Hidden Edges
             GUI.showHiddenEdgesToggle = Draw.Toggle("Show Hidden Edges",
-                    GUI.evtShowHiddenEdgesToggle,
-                    200, 160, 160, 18, GUI.showHiddenEdgesToggle.val,
-                    "Render hidden edges as dashed lines")
-
+                GUI.evtShowHiddenEdgesToggle,
+                200, 160, 160, 18, GUI.showHiddenEdgesToggle.val,
+                "Render hidden edges as dashed lines")
 
     def event(evt, val):
 
@@ -3060,7 +3007,7 @@ class GUI:
 
         elif evt == GUI.evtOutFormatMenu:
             i = GUI.outFormatMenu.val - 1
-            config.output['FORMAT']= outputWriters.keys()[i]
+            config.output['FORMAT'] = outputWriters.keys()[i]
             # Set the new output file
             global outputfile
             outputfile = Blender.sys.splitext(basename)[0] + "." + str(config.output['FORMAT']).lower()
@@ -3092,7 +3039,7 @@ class GUI:
             config.edges['WIDTH'] = float(GUI.edgeWidthSlider.val)
 
         elif evt == GUI.evtEdgeColorPicker:
-            config.edges['COLOR'] = [int(c*255.0) for c in GUI.edgeColorPicker.val]
+            config.edges['COLOR'] = [int(c * 255.0) for c in GUI.edgeColorPicker.val]
 
         elif evt == GUI.evtRenderButton:
             label = "Save %s" % config.output['FORMAT']
@@ -3123,6 +3070,7 @@ class GUI:
     button_event = staticmethod(button_event)
     conf_debug = staticmethod(conf_debug)
 
+
 # A wrapper function for the vectorizing process
 def vectorize(filename):
     """The vectorizing process is as follows:
@@ -3137,7 +3085,8 @@ def vectorize(filename):
 
     from Blender import Window
     editmode = Window.EditMode()
-    if editmode: Window.EditMode(0)
+    if editmode:
+        Window.EditMode(0)
 
     actualWriter = outputWriters[config.output['FORMAT']]
     writer = actualWriter(filename)
@@ -3145,8 +3094,8 @@ def vectorize(filename):
     renderer = Renderer()
     renderer.doRendering(writer, config.output['ANIMATION'])
 
-    if editmode: Window.EditMode(1)
-
+    if editmode:
+        Window.EditMode(1)
 
 
 # Here the main