diff --git a/topics/three_dimensions.py b/topics/three_dimensions.py
index 5fc3fe68..752e4818 100644
--- a/topics/three_dimensions.py
+++ b/topics/three_dimensions.py
@@ -7,7 +7,7 @@ from scene import Scene
 from camera import Camera
 from animation.continual_animation import AmbientMovement
 from animation.transform import ApplyMethod
-import numpy as np
+
 class CameraWithPerspective(Camera):
     CONFIG = {
         "camera_distance" : 20,
@@ -237,139 +237,53 @@ class ThreeDMobject(VMobject):
         VMobject.__init__(self, *args, **kwargs)
         shade_in_3d(self)
 
-
 class Cube(ThreeDMobject):
     CONFIG = {
-        'fill_opacity': 0.75,
-        'fill_color': BLUE,
-        'stroke_width': 0,
-        'propagate_style_to_family': True,
-        'side_length': 2
+        "fill_opacity" : 0.75,
+        "fill_color" : BLUE,
+        "stroke_width" : 0,
+        "propagate_style_to_family" : True,
+        "side_length" : 2,
     }
-
     def generate_points(self):
-        for vect in (IN,
-         OUT,
-         LEFT,
-         RIGHT,
-         UP,
-         DOWN):
-            face = Square(side_length=self.side_length)
-            face.shift(self.side_length * OUT / 2.0)
-            face.apply_function(lambda p: np.dot(p, z_to_vector(vect).T))
+        for vect in IN, OUT, LEFT, RIGHT, UP, DOWN:
+            face = Square(side_length = self.side_length)
+            face.shift(self.side_length*OUT/2.0)
+            face.apply_function(lambda p : np.dot(p, z_to_vector(vect).T))
+
             self.add(face)
 
-
-class Sphere(ThreeDMobject):
-    CONFIG = {
-        'fill_opacity': .75,
-        'fill_color': BLUE,
-        'stroke_width': 0,
-        'propagate_style_to_family': True,
-        'side_length': 2
-    }
-    def __init__(self, r, eps, opacity = .75):
-        self.r = r
-        self.eps = eps
-        self.CONFIG['fill_opacity'] = opacity
-        ThreeDMobject.__init__(self)
-
-    def generate_points(self):
-        points = [
-            (
-                self.r * (np.sin(phi) * np.cos(theta)), 
-                self.r * (np.sin(phi) * np.sin(theta)), 
-                self.r * np.cos(phi)
-            ) 
-            for phi in np.arange(0, 2 * np.pi, self.eps) 
-            for theta in np.arange(0, 2 * np.pi, self.eps) 
-        ]
-        for vect in points:
-            face = Square(side_length=self.eps)
-            scalefactor = np.linalg.norm(vect)
-            face.shift(scalefactor * OUT / 2.0)
-            face.apply_function(lambda p: np.dot(p, z_to_vector(vect).T))
-            self.add(face)
-        shade_in_3d(self)
-
-class Torus(ThreeDMobject):
-    CONFIG = {
-        'fill_opacity': .75,
-        'fill_color': BLUE,
-        'stroke_width': 0,
-        'propagate_style_to_family': True,
-        'side_length': 2
-     }
-    def __init__(self, r1, r2, eps, opacity=.75):
-        self.r1 = r1
-        self.r2 = r2
-        self.eps = eps
-        self.CONFIG['fill_opacity'] = opacity
-        ThreeDMobject.__init__(self)
-
-
-    def generate_points(self):
-        points = [ 
-            (
-                (self.r1 + self.r2 * np.cos(theta)) * np.cos(phi),
-                (self.r1 + self.r2 * np.cos(theta)) * np.sin(phi), 
-                self.r2 * np.sin(theta)
-            ) 
-            for phi in np.arange(0, 2 * np.pi, self.eps) 
-            for theta in np.arange(0, 2 * np.pi, self.eps) 
-        ]
-        for vect in points:
-            face = Square(side_length=self.eps)
-            scalefactor = np.linalg.norm(vect)
-            face.shift(scalefactor * OUT / 2.0)
-            face.apply_function(lambda p: np.dot(p, z_to_vector(vect).T))
-            self.add(face)
-        shade_in_3d(self)
-
-
-class Parametric3D(ThreeDMobject):
-    CONFIG = {
-        'fill_opacity': 0.75,
-        'fill_color': BLUE,
-        'stroke_width': 0,
-        'propagate_style_to_family': True
-    }
-
-    def __init__(self, f, g, h, phi_min, phi_max, theta_min, theta_max, eps, opacity = .75):
-        self.f = f
-        self.g = g
-        self.h = h
-        self.phi_min = phi_min
-        self.phi_max = phi_max
-        self.theta_min = theta_min
-        self.theta_max = theta_max
-        self.eps = eps
-        self.CONFIG['fill_opacity'] = opacity
-        ThreeDMobject.__init__(self)
-
-    def generate_points(self):
-        points = [
-            (
-                self.f(phi, theta), 
-                self.g(phi, theta), 
-                self.h(phi, theta)
-            ) 
-            for phi in np.arange(self.phi_min, self.phi_max, self.eps) 
-            for theta in np.arange(self.theta_min, self.theta_max, self.eps) 
-        ]
-        for vect in points:
-            face = Square(side_length=self.eps)
-            scalefactor = np.linalg.norm(vect)
-            face.shift(scalefactor * OUT / 2.0)
-            face.apply_function(lambda p: np.dot(p, z_to_vector(vect).T))
-            self.add(face)
-        shade_in_3d(self)
-
-
 class Prism(Cube):
-    CONFIG = {'dimensions': [3, 2, 1]}
-
+    CONFIG = {
+        "dimensions" : [3, 2, 1]
+    }
     def generate_points(self):
         Cube.generate_points(self)
         for dim, value in enumerate(self.dimensions):
-            self.rescale_to_fit(value, dim, stretch=True)
\ No newline at end of file
+            self.rescale_to_fit(value, dim, stretch = True)
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