Added GAN visualization.

Readme.md

@@ -31,43 +31,40 @@ Checkout the ```examples``` directory for some example videos with source code.
 
 ### Neural Networks
 
-This is a visualization of a Neural Network made using ManimML. It has a Pytorch style list of layers that can be composed in arbitrary order. The following video is made with the code from below.  
+This is a visualization of a Variational Autoencoder made using ManimML. It has a Pytorch style list of layers that can be composed in arbitrary order. The following video is made with the code from below.  
 
-<img src="examples/media/ImageNeuralNetworkScene.gif">
+<img src="examples/media/VAEScene.gif">
 
 ```python
-from manim import *
-from manim_ml.neural_network.layers import FeedForwardLayer, ImageLayer
-from manim_ml.neural_network.neural_network import NeuralNetwork
-from PIL import Image
-import numpy as np
-
-class ImageNeuralNetworkScene(Scene):
+class VariationalAutoencoderScene(Scene):
 
     def construct(self):
+        embedding_layer = EmbeddingLayer(dist_theme="ellipse").scale(2)
+        
         image = Image.open('images/image.jpeg')
         numpy_image = np.asarray(image)
         # Make nn
-        layers = [
-            ImageLayer(numpy_image, height=1.0),
-            FeedForwardLayer(3), 
+        neural_network = NeuralNetwork([
+            ImageLayer(numpy_image, height=1.4),
             FeedForwardLayer(5),
-            FeedForwardLayer(3)
-        ]
-        nn = NeuralNetwork(layers)
-        # Center the nn
-        nn.move_to(ORIGIN)
-        self.add(nn)
-        # Play animation
-        self.play(nn.make_forward_pass_animation())
+            FeedForwardLayer(3),
+            embedding_layer,
+            FeedForwardLayer(3),
+            FeedForwardLayer(5),
+            ImageLayer(numpy_image, height=1.4),
+        ], layer_spacing=0.1)
+
+        neural_network.scale(1.3)
+
+        self.play(Create(neural_network))
+        self.play(neural_network.make_forward_pass_animation(run_time=15))
 ```
 
+### Generative Adversarial Network
 
-### Variational Autoencoders
+This is a visualization of a Generative Adversarial Network made using ManimML. 
 
-This is a visualization of a Variational Autoencoder. 
-
-<img src="examples/media/VAEScene.gif">
+<img src="examples/media/GANScene.gif">
 
 ### VAE Disentanglement 
 

examples/gan/gan.py

@@ -0,0 +1,190 @@
+import random
+from PIL import Image
+from manim import *
+from manim_ml.neural_network.layers.embedding import EmbeddingLayer
+from manim_ml.neural_network.layers.feed_forward import FeedForwardLayer
+from manim_ml.neural_network.layers.image import ImageLayer
+from manim_ml.neural_network.layers.vector import VectorLayer
+
+from manim_ml.neural_network.neural_network import NeuralNetwork
+
+config.pixel_height = 1080
+config.pixel_width = 1080
+config.frame_height = 8.3
+config.frame_width = 8.3
+
+class GAN(Mobject):
+    """Generative Adversarial Network"""
+    
+    def __init__(self):
+        super().__init__()
+        self.make_entities()
+        self.place_entities()
+        self.titles = self.make_titles()
+
+    def make_entities(self, image_height=1.2):
+        """Makes all of the network entities"""
+        # Make the fake image layer
+        default_image = Image.open('../../assets/gan/fake_image.png')
+        numpy_image = np.asarray(default_image)
+        self.fake_image_layer = ImageLayer(numpy_image, height=image_height, show_image_on_create=False) 
+        # Make the Generator Network
+        self.generator = NeuralNetwork([
+            EmbeddingLayer(covariance=np.array([[3.0, 0], [0, 3.0]])).scale(1.3),
+            FeedForwardLayer(3),
+            FeedForwardLayer(5),
+            self.fake_image_layer
+        ], layer_spacing=0.1)
+
+        self.add(self.generator)
+        # Make the Discriminator
+        self.discriminator = NeuralNetwork([
+            FeedForwardLayer(5),
+            FeedForwardLayer(1),
+            VectorLayer(1, value_func=lambda: random.uniform(0, 1)),
+        ], layer_spacing=0.1)
+        self.add(self.discriminator)
+        # Make Ground Truth Dataset
+        default_image = Image.open('../../assets/gan/real_image.jpg')
+        numpy_image = np.asarray(default_image)
+        self.ground_truth_layer = ImageLayer(numpy_image, height=image_height)
+        self.add(self.ground_truth_layer)
+
+        self.scale(1)
+
+    def place_entities(self):
+        """Positions entities in correct places"""
+        # Place relative to generator
+        # Place the ground_truth image layer
+        self.ground_truth_layer.next_to(self.fake_image_layer, DOWN, 0.8)
+        # Group the images
+        image_group = Group(self.ground_truth_layer, self.fake_image_layer)
+        # Move the discriminator to the right of thee generator
+        self.discriminator.next_to(self.generator, RIGHT, 0.2)
+        self.discriminator.match_y(image_group)
+        # Move the discriminator to the height of the center of the image_group
+        # self.discriminator.match_y(image_group)
+        # self.ground_truth_layer.next_to(self.fake_image_layer, DOWN, 0.5)
+
+    def make_titles(self):
+        """Makes titles for the different entities"""
+        titles = VGroup()
+
+        self.ground_truth_layer_title = Text("Real Image").scale(0.3)
+        self.ground_truth_layer_title.next_to(self.ground_truth_layer, UP, 0.1)
+        self.add(self.ground_truth_layer_title)
+        titles.add(self.ground_truth_layer_title)
+        self.fake_image_layer_title = Text("Fake Image").scale(0.3)
+        self.fake_image_layer_title.next_to(self.fake_image_layer, UP, 0.1)
+        self.add(self.fake_image_layer_title)
+        titles.add(self.fake_image_layer_title)
+        # Overhead title
+        overhead_title = Text("Generative Adversarial Network").scale(0.75)
+        overhead_title.shift(np.array([0, 3.5, 0]))
+        titles.add(overhead_title)
+        # Probability title
+        self.probability_title = Text("Probability").scale(0.5)
+        self.probability_title.move_to(self.discriminator.input_layers[-2])
+        self.probability_title.shift(UP)
+        self.probability_title.shift(RIGHT*1.05)
+        titles.add(self.probability_title)
+
+        return titles
+
+    def make_highlight_generator_rectangle(self):
+        """Returns animation that highlights the generators contents"""
+        group = VGroup()
+
+        generator_surrounding_group = Group(
+            self.generator, 
+            self.fake_image_layer_title
+        )
+
+        generator_surrounding_rectangle = SurroundingRectangle(
+            generator_surrounding_group,
+            buff=0.1, 
+            stroke_width=4.0,
+            color="#0FFF50"
+        )
+        group.add(generator_surrounding_rectangle)
+        title = Text("Generator").scale(0.5)
+        title.next_to(generator_surrounding_rectangle, UP, 0.2)
+        group.add(title)
+
+        return group
+
+    def make_highlight_discriminator_rectangle(self):
+        """Makes a rectangle for highlighting the discriminator"""
+        discriminator_group = Group(
+            self.discriminator,
+            self.fake_image_layer,
+            self.ground_truth_layer,
+            self.fake_image_layer_title,
+            self.probability_title
+        )
+
+        group = VGroup()
+
+        discriminator_surrounding_rectangle = SurroundingRectangle(
+            discriminator_group,
+            buff=0.05, 
+            stroke_width=4.0,
+            color="#0FFF50"
+        )
+        group.add(discriminator_surrounding_rectangle)
+        title = Text("Discriminator").scale(0.5)
+        title.next_to(discriminator_surrounding_rectangle, UP, 0.2)
+        group.add(title)
+
+        return group
+
+    def make_generator_forward_pass(self):
+        """Makes forward pass of the generator"""
+        
+        forward_pass = self.generator.make_forward_pass_animation(dist_theme="ellipse")
+
+        return forward_pass
+
+    def make_discriminator_forward_pass(self):
+        """Makes forward pass of the discriminator"""
+
+        disc_forward = self.discriminator.make_forward_pass_animation()
+        
+        return disc_forward
+
+    @override_animation(Create)
+    def _create_override(self):
+        """Overrides create"""
+        animation_group = AnimationGroup(
+            Create(self.generator),
+            Create(self.discriminator),
+            Create(self.ground_truth_layer),
+            Create(self.titles)
+        )
+        return animation_group
+
+class GANScene(Scene):
+    """GAN Scene"""
+
+    def construct(self):
+        gan = GAN().scale(1.70)
+        gan.move_to(ORIGIN)
+        gan.shift(DOWN*0.35)
+        gan.shift(LEFT*0.1)
+        self.play(Create(gan), run_time=3)
+        # Highlight generator
+        highlight_generator_rectangle = gan.make_highlight_generator_rectangle()
+        self.play(Create(highlight_generator_rectangle), run_time=1)
+        # Generator forward pass
+        gen_forward_pass = gan.make_generator_forward_pass()
+        self.play(gen_forward_pass, run_time=5)
+        # Fade out generator highlight
+        self.play(Uncreate(highlight_generator_rectangle), run_time=1)
+        # Highlight discriminator 
+        highlight_discriminator_rectangle = gan.make_highlight_discriminator_rectangle()
+        self.play(Create(highlight_discriminator_rectangle), run_time=1)
+        # Discriminator forward pass
+        discriminator_forward_pass = gan.make_discriminator_forward_pass()
+        self.play(discriminator_forward_pass, run_time=5)
+        # Unhighlight discriminator
+        self.play(Uncreate(highlight_discriminator_rectangle), run_time=1)

examples/variational_autoencoder/variational_autoencoder.py

@@ -8,7 +8,12 @@ from manim import *
 import pickle
 import numpy as np
 import os
+from PIL import Image
 import manim_ml.neural_network as neural_network
+from manim_ml.neural_network.embedding import EmbeddingLayer
+from manim_ml.neural_network.feed_forward import FeedForwardLayer
+from manim_ml.neural_network.image import ImageLayer
+from manim_ml.neural_network.neural_network import NeuralNetwork
 
 class VariationalAutoencoder(VGroup):
     """Variational Autoencoder Manim Visualization"""
@@ -239,6 +244,29 @@ class VariationalAutoencoder(VGroup):
 
         return animation_group
 
+class VariationalAutoencoder(VGroup):
+
+    def __init__(self):
+        embedding_layer = EmbeddingLayer()
+        
+        image = Image.open('images/image.jpeg')
+        numpy_image = np.asarray(image)
+        # Make nn
+        neural_network = NeuralNetwork([
+            ImageLayer(numpy_image, height=1.4),
+            FeedForwardLayer(5),
+            FeedForwardLayer(3),
+            embedding_layer,
+            FeedForwardLayer(3),
+            FeedForwardLayer(5),
+            ImageLayer(numpy_image, height=1.4),
+        ])
+
+        neural_network.scale(1.3)
+
+        self.play(Create(neural_network))
+        self.play(neural_network.make_forward_pass_animation(run_time=15))
+
 class MNISTImageHandler():
     """Deals with loading serialized VAE mnist images from "autoencoder_models" """
 
@@ -295,19 +323,4 @@ class VAEScene(Scene):
         # Interpolation animation
         interpolation_images = mnist_image_handler.interpolation_images
         interpolation_animation = vae.make_interpolation_animation(interpolation_images)
-        self.play(interpolation_animation)
-
-class VAEImage(Scene):
-
-    def construct(self):
-        # Set Scene config
-        vae = VariationalAutoencoder()
-        mnist_image_handler = MNISTImageHandler()
-        image_pair = mnist_image_handler.image_pairs[3]
-        vae.move_to(ORIGIN)
-        vae.scale(1.3)
-        self.play(Create(vae), run_time=3)
-        # Make a forward pass animation
-        forward_pass_animation = vae.make_forward_pass_animation(image_pair)
-        self.play(forward_pass_animation)
- 
+        self.play(interpolation_animation)

manim_ml/neural_network/layers/embedding.py

@@ -5,18 +5,17 @@ from manim_ml.neural_network.layers.parent_layers import VGroupNeuralNetworkLaye
 class EmbeddingLayer(VGroupNeuralNetworkLayer):
     """NeuralNetwork embedding object that can show probability distributions"""
 
-    def __init__(self, point_radius=0.02, **kwargs):
+    def __init__(self, point_radius=0.02, mean = np.array([0, 0]), 
+                covariance=np.array([[1.5, 0], [0, 1.5]]), **kwargs):
         super(VGroupNeuralNetworkLayer, self).__init__(**kwargs)
         self.point_radius = point_radius
         self.axes = Axes(
             tips=False,
-            x_length=1,
-            y_length=1
+            x_length=0.8,
+            y_length=0.8
         )
         self.add(self.axes)
         # Make point cloud
-        mean = np.array([0, 0])
-        covariance = np.array([[1.5, 0], [0, 1.5]])
         self.point_cloud = self.construct_gaussian_point_cloud(mean, covariance)
         self.add(self.point_cloud)
         # Make latent distribution
@@ -50,10 +49,14 @@ class EmbeddingLayer(VGroupNeuralNetworkLayer):
 
         return point_dots
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, dist_theme="gaussian", **kwargs):
         """Forward pass animation"""
         # Make ellipse object corresponding to the latent distribution
-        self.latent_distribution = GaussianDistribution(self.axes) # Use defaults
+        self.latent_distribution = GaussianDistribution(
+            self.axes, 
+            dist_theme=dist_theme, 
+            cov=np.array([[0.8, 0], [0.0, 0.8]])
+        ) # Use defaults
         # Create animation
         animations = []
         #create_distribution = Create(self.latent_distribution.construct_gaussian_distribution(self.latent_distribution.mean, self.latent_distribution.cov)) #Create(self.latent_distribution)

manim_ml/neural_network/layers/embedding_to_feed_forward.py

@@ -17,7 +17,7 @@ class EmbeddingToFeedForward(ConnectiveLayer):
         self.animation_dot_color = animation_dot_color
         self.dot_radius = dot_radius
 
-    def make_forward_pass_animation(self, run_time=1.5):
+    def make_forward_pass_animation(self, run_time=1.5, **kwargs):
         """Makes dots diverge from the given location and move the decoder"""
         # Find point to converge on by sampling from gaussian distribution
         location = self.embedding_layer.sample_point_location_from_distribution()

manim_ml/neural_network/layers/feed_forward.py

@@ -44,7 +44,7 @@ class FeedForwardLayer(VGroupNeuralNetworkLayer):
         # Add the objects to the class
         self.add(self.surrounding_rectangle, self.node_group)
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         # make highlight animation
         succession = Succession(
             ApplyMethod(self.node_group.set_color, self.animation_dot_color, run_time=0.25),

manim_ml/neural_network/layers/feed_forward_to_feed_forward.py

@@ -33,7 +33,18 @@ class FeedForwardToFeedForward(ConnectiveLayer):
         edges = VGroup(*edges)
         return edges
 
-    def make_forward_pass_animation(self, run_time=1):
+    @override_animation(FadeOut)
+    def _fadeout_animation(self):
+        animations = []
+        
+        for edge in self.edges:
+            animations.append(FadeOut(edge))
+
+        animation_group = AnimationGroup(*animations)
+
+        return animation_group
+
+    def make_forward_pass_animation(self, run_time=1, **kwargs):
         """Animation for passing information from one FeedForwardLayer to the next"""
         path_animations = []
         dots = []

manim_ml/neural_network/layers/feed_forward_to_image.py

@@ -18,7 +18,7 @@ class FeedForwardToImage(ConnectiveLayer):
         self.feed_forward_layer = input_layer
         self.image_layer = output_layer
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         """Makes dots diverge from the given location and move to the feed forward nodes decoder"""
         animations = []
         image_mobject = self.image_layer.image_mobject

manim_ml/neural_network/layers/image.py

@@ -5,9 +5,10 @@ from manim_ml.neural_network.layers.parent_layers import NeuralNetworkLayer
 class ImageLayer(NeuralNetworkLayer):
     """Single Image Layer for Neural Network"""
 
-    def __init__(self, numpy_image, height=1.5, **kwargs):
+    def __init__(self, numpy_image, height=1.5, show_image_on_create=True, **kwargs):
         super().__init__(**kwargs)
         self.numpy_image = numpy_image
+        self.show_image_on_create = show_image_on_create
         if len(np.shape(self.numpy_image)) == 2:
             # Assumed Grayscale
             self.image_mobject = GrayscaleImageMobject(self.numpy_image, height=height)
@@ -21,9 +22,12 @@ class ImageLayer(NeuralNetworkLayer):
         debug_mode = False
         if debug_mode:
             return FadeIn(SurroundingRectangle(self.image_mobject))
-        return FadeIn(self.image_mobject)
+        if self.show_image_on_create:
+            return FadeIn(self.image_mobject)
+        else:
+            return AnimationGroup()
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         return FadeIn(self.image_mobject)
     
     # def move_to(self, location):
@@ -36,4 +40,8 @@ class ImageLayer(NeuralNetworkLayer):
 
     @property
     def width(self):
-        return self.image_mobject.width
+        return self.image_mobject.width
+
+    @property
+    def height(self):
+        return self.image_mobject.height

manim_ml/neural_network/layers/image_to_feed_forward.py

@@ -18,7 +18,7 @@ class ImageToFeedForward(ConnectiveLayer):
         self.feed_forward_layer = output_layer
         self.image_layer = input_layer
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         """Makes dots diverge from the given location and move to the feed forward nodes decoder"""
         animations = []
         dots = []

manim_ml/neural_network/layers/paired_query.py

@@ -60,6 +60,6 @@ class PairedQueryLayer(NeuralNetworkLayer):
         # TODO make Create animation that is custom
         return FadeIn(self.assets)
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         """Forward pass for query"""
         return AnimationGroup()

manim_ml/neural_network/layers/paired_query_to_feed_forward.py

@@ -17,7 +17,7 @@ class PairedQueryToFeedForward(ConnectiveLayer):
         self.paired_query_layer = input_layer
         self.feed_forward_layer = output_layer
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         """Makes dots diverge from the given location and move to the feed forward nodes decoder"""
         animations = []
         # Loop through each image

manim_ml/neural_network/layers/parent_layers.py

@@ -7,10 +7,12 @@ class NeuralNetworkLayer(ABC, Group):
     def __init__(self, text=None, **kwargs):
         super(Group, self).__init__()
         self.title_text = kwargs["title"] if "title" in kwargs else " "
-        self.title = Text(self.title_text, font_size=DEFAULT_FONT_SIZE/3)
+        self.title = Text(self.title_text, font_size=DEFAULT_FONT_SIZE/3).scale(0.6)
+        # self.title.next_to(self, UP, 1.2)
+        # self.add(self.title)
 
     @abstractmethod
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         pass
 
     @override_animation(Create)
@@ -26,7 +28,7 @@ class VGroupNeuralNetworkLayer(NeuralNetworkLayer):
         super().__init__(**kwargs)
 
     @abstractmethod
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         pass 
 
     @override_animation(Create)
@@ -49,7 +51,7 @@ class ConnectiveLayer(VGroupNeuralNetworkLayer):
         assert isinstance(output_layer, self.output_class)
 
     @abstractmethod
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         pass
 
     @override_animation(Create)

manim_ml/neural_network/layers/triplet.py

@@ -71,6 +71,6 @@ class TripletLayer(NeuralNetworkLayer):
         # TODO make Create animation that is custom
         return FadeIn(self.assets)
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         """Forward pass for triplet"""
         return AnimationGroup()

manim_ml/neural_network/layers/triplet_to_feed_forward.py

@@ -18,7 +18,7 @@ class TripletToFeedForward(ConnectiveLayer):
         self.feed_forward_layer = output_layer
         self.triplet_layer = input_layer
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         """Makes dots diverge from the given location and move to the feed forward nodes decoder"""
         animations = []
         # Loop through each image

manim_ml/neural_network/layers/vector.py

@@ -23,12 +23,12 @@ class VectorLayer(VGroupNeuralNetworkLayer):
             values = values[None, :].T
             vector = Matrix(values)
 
-        vector_label = Text(f"[{self.value_func():.2}]")
-        vector_label.scale(0.5)
+        vector_label = Text(f"[{self.value_func():.2f}]")
+        vector_label.scale(0.3)
 
         return vector_label
 
-    def make_forward_pass_animation(self):
+    def make_forward_pass_animation(self, **kwargs):
         return AnimationGroup()
         
     @override_animation(Create)

manim_ml/neural_network/neural_network.py

@@ -9,35 +9,15 @@ Example:
     # Create the object with default style settings
     NeuralNetwork(layer_node_count)
 """
-from socket import create_connection
 from manim import *
 import warnings
 import textwrap
 
-from manim_ml.neural_network.layers import connective_layers_list
 from manim_ml.neural_network.layers.feed_forward import FeedForwardLayer
 from manim_ml.neural_network.layers.util import get_connective_layer
 from manim_ml.list_group import ListGroup
 
-class LazyAnimation(Animation):
-    """
-        Lazily creates animation when the animation is called.
-
-        This is helpful when creating the animation depends upon the internal
-        state of some set of objects. 
-    """
-
-    def __init__(self, animation_func):
-        self.animation_func = animation_func
-        super().__init__(None)
-
-    def begin(self):
-        """Begins animation"""
-        self.mobject, animation = self.animation_func()
-        animation = Create(self.mobject)
-        animation.begin()
-
-class RemoveLayer(Succession):
+class RemoveLayer(AnimationGroup):
     """
         Animation for removing a layer from a neural network.
 
@@ -183,6 +163,99 @@ class RemoveLayer(Succession):
         update_func_anim = UpdateFromFunc(self.neural_network, create_new_connective)
 
         return update_func_anim
+
+class InsertLayer(AnimationGroup):
+    """Animation for inserting layer at given index"""
+
+    def __init__(self, layer, index, neural_network):
+        self.layer = layer
+        self.index = index
+        self.neural_network = neural_network
+        # Layers before and after
+        self.layers_before = self.neural_network.all_layers[:self.index]
+        self.layers_after = self.neural_network.all_layers[self.index:]
+
+        remove_connective_layer = self.remove_connective_layer()
+        move_layers = self.make_move_layers()
+        # create_layer = self.make_create_layer()
+        # create_connective_layers = self.make_create_connective_layers()
+        animations = [
+            remove_connective_layer,
+            move_layers,
+        #    create_layer, 
+        #    create_connective_layers
+        ]
+
+        super().__init__(*animations, lag_ratio=1.0)
+
+    def remove_connective_layer(self):
+        """Removes the connective layer before the insertion index"""
+        # Check if connective layer exists
+        if len(self.layers_before) > 0:
+            removed_connective = self.layers_before[-1]
+            self.neural_network.all_layers.remove(removed_connective)
+            # Make remove animation
+            remove_animation = FadeOut(removed_connective)
+            return remove_animation
+
+        return AnimationGroup()
+
+    def make_move_layers(self):
+        """Shifts layers before and after"""
+        # Before layer shift
+        before_shift_animation = AnimationGroup()
+        if len(self.layers_before) > 0:
+            before_shift = np.array([-self.layer.width/2, 0, 0])
+            # Shift layers before
+            before_shift_animation = Group(*self.layers_before).animate.shift(before_shift)
+        # After layer shift
+        after_shift_animation = AnimationGroup()
+        if len(self.layers_after) > 0:
+            after_shift = np.array([self.layer.width/2, 0, 0])
+            # Shift layers after
+            after_shift_animation = Group(*self.layers_after).animate.shift(after_shift)
+        # Make animation group
+        shift_animations = AnimationGroup(
+            before_shift_animation, 
+            after_shift_animation
+        )
+
+        return shift_animations
+
+    def make_create_layer(self):
+        """Animates the creation of the layer"""
+        pass
+
+    def make_create_connective_layers(self):
+        pass
+
+        
+        # Make connective layers and shift animations
+        # Before layer
+        if len(layers_before) > 0:
+            before_connective = get_connective_layer(layers_before[-1], layer)
+            before_shift = np.array([-layer.width/2, 0, 0])
+            # Shift layers before
+            before_shift_animation = Group(*layers_before).animate.shift(before_shift)
+        else:
+            before_connective = AnimationGroup()
+        # After layer
+        if len(layers_after) > 0:
+            after_connective = get_connective_layer(layer, layers_after[0])
+            after_shift = np.array([layer.width/2, 0, 0])
+            # Shift layers after
+            after_shift_animation = Group(*layers_after).animate.shift(after_shift)
+        else:
+            after_connective = AnimationGroup
+
+        insert_animation = Create(layer)
+        animation_group = AnimationGroup(
+            shift_animations, 
+            insert_animation,
+            lag_ratio=1.0
+        )
+
+        return animation_group
     
 class NeuralNetwork(Group):
 
@@ -202,9 +275,6 @@ class NeuralNetwork(Group):
         # and make it have explicit distinct subspaces
         self._place_layers()
         self.connective_layers, self.all_layers = self._construct_connective_layers()
-        # Make layer titles
-        self.layer_titles = self._make_layer_titles()
-        self.add(self.layer_titles)
         # Make overhead title
         self.title = Text(self.title_text, font_size=DEFAULT_FONT_SIZE/2)
         self.title.next_to(self, UP, 1.0)
@@ -229,15 +299,6 @@ class NeuralNetwork(Group):
             shift_vector = np.array([(previous_layer.get_width()/2 + current_layer.get_width()/2) + self.layer_spacing, 0, 0])
             current_layer.shift(shift_vector)
 
-    def _make_layer_titles(self):
-        """Makes titles"""
-        titles = VGroup()
-        for layer in self.all_layers:
-            title = layer.title
-            title.next_to(layer, UP, 0.2)
-            titles.add(title)
-        return titles
-
     def _construct_connective_layers(self):
         """Draws connecting lines between layers"""
         connective_layers = ListGroup()
@@ -264,40 +325,9 @@ class NeuralNetwork(Group):
 
     def insert_layer(self, layer, insert_index):
         """Inserts a layer at the given index"""
-        layers_before = self.all_layers[:insert_index]
-        layers_after = self.all_layers[insert_index:]
-        # Make connective layers and shift animations
-        # Before layer
-        if len(layers_before) > 0:
-            before_connective = get_connective_layer(layers_before[-1], layer)
-            before_shift = np.array([-layer.width/2, 0, 0])
-            # Shift layers before
-            before_shift_animation = Group(*layers_before).animate.shift(before_shift)
-        else:
-            before_connective = AnimationGroup()
-        # After layer
-        if len(layers_after) > 0:
-            after_connective = get_connective_layer(layer, layers_after[0])
-            after_shift = np.array([layer.width/2, 0, 0])
-            # Shift layers after
-            after_shift_animation = Group(*layers_after).animate.shift(after_shift)
-        else:
-            after_connective = AnimationGroup
-
-        # Make animation group
-        shift_animations = AnimationGroup(
-            before_shift_animation, 
-            after_shift_animation
-        )
-
-        insert_animation = Create(layer)
-        animation_group = AnimationGroup(
-            shift_animations, 
-            insert_animation,
-            lag_ratio=1.0
-        )
-
-        return animation_group
+        neural_network = self
+        insert_animation = InsertLayer(layer, insert_index, neural_network)
+        return insert_animation
 
     def remove_layer(self, layer):
         """Removes layer object if it exists"""
@@ -317,17 +347,18 @@ class NeuralNetwork(Group):
 
         return animation_group
 
-    def make_forward_pass_animation(self, run_time=10, passing_flash=True):
+    def make_forward_pass_animation(self, run_time=10, passing_flash=True,
+                                    **kwargs):
         """Generates an animation for feed forward propagation"""
         all_animations = []
         for layer_index, layer in enumerate(self.input_layers[:-1]):
-            layer_forward_pass = layer.make_forward_pass_animation()
+            layer_forward_pass = layer.make_forward_pass_animation(**kwargs)
             all_animations.append(layer_forward_pass)
             connective_layer = self.connective_layers[layer_index]
-            connective_forward_pass = connective_layer.make_forward_pass_animation()
+            connective_forward_pass = connective_layer.make_forward_pass_animation(**kwargs)
             all_animations.append(connective_forward_pass)
         # Do last layer animation
-        last_layer_forward_pass = self.input_layers[-1].make_forward_pass_animation()
+        last_layer_forward_pass = self.input_layers[-1].make_forward_pass_animation(**kwargs)
         all_animations.append(last_layer_forward_pass)
         # Make the animation group
         animation_group = AnimationGroup(*all_animations, run_time=run_time, lag_ratio=1.0)

manim_ml/probability.py

@@ -5,17 +5,23 @@ import math
 class GaussianDistribution(VGroup):
     """Object for drawing a Gaussian distribution"""
 
-    def __init__(self, axes, mean=None, cov=None, **kwargs):
+    def __init__(self, axes, mean=None, cov=None, dist_theme="gaussian", **kwargs):
         super(VGroup, self).__init__(**kwargs)
         self.axes = axes
         self.mean = mean
         self.cov = cov
+        self.dist_theme = dist_theme
         if mean is None:
             self.mean = np.array([0.0, 0.0])
         if cov is None:
-            self.cov = np.array([[3, 0], [0, 3]])
+            self.cov = np.array([[1, 0], [0, 1]])
         # Make the Gaussian
-        self.ellipses = self.construct_gaussian_distribution(self.mean, self.cov)
+        if self.dist_theme is "gaussian":
+            self.ellipses = self.construct_gaussian_distribution(self.mean, self.cov)
+        elif self.dist_theme is "ellipse":
+            self.ellipses = self.construct_simple_gaussian_ellipse(self.mean, self.cov)
+        else:
+            raise Exception(f"Uncrecognized distribution theme: {self.dist_theme}")
         
     @override_animation(Create)
     def _create_gaussian_distribution(self):
@@ -65,3 +71,30 @@ class GaussianDistribution(VGroup):
 
         return ellipses
 
+    def construct_simple_gaussian_ellipse(self, mean, covariance, color=ORANGE):
+        """Returns a 2d Gaussian distribution object with given mean and covariance"""
+        # map mean and covariance to frame coordinates
+        mean = self.axes.coords_to_point(*mean)
+        # Figure out the scale and angle of rotation
+        # TODO fix this
+        # rotation, width, height = self.compute_covariance_rotation_and_scale(covariance)
+        mean = np.array([0, 0, 0])
+        mean = self.axes.coords_to_point(*mean)
+        rotation = 0.0
+        # Make covariance ellipses
+        opacity = 0.0
+        ellipses = VGroup()
+        opacity = 0.2
+        ellipse = Ellipse(
+            width=0.6, 
+            height=0.6, 
+            color=color, 
+            fill_opacity=opacity, 
+            stroke_width=2.0
+        )
+        ellipse.move_to(mean)
+        ellipse.rotate(rotation)
+        ellipses.add(ellipse)
+
+        return ellipses
+

tests/test_convolutional_layer.py

@@ -0,0 +1,42 @@
+from manim import *
+
+from manim_ml.neural_network.layers.convolutional import ConvolutionalLayer
+from manim_ml.neural_network.layers.feed_forward import FeedForwardLayer
+from manim_ml.neural_network.neural_network import NeuralNetwork
+
+class SingleConvolutionalLayerScence(Scene):
+
+    def construct(self):
+        
+        # Make nn
+        layers = [
+            ConvolutionalLayer()
+        ]
+        nn = NeuralNetwork(layers)
+        nn.scale(1.3)
+        # Center the nn
+        nn.move_to(ORIGIN)
+        self.add(nn)
+        # Play animation
+        self.play(nn.make_forward_pass_animation(run_time=5))
+        self.play(nn.make_forward_pass_animation(run_time=5))
+
+class ThreeDLightSourcePosition(ThreeDScene, Scene):
+    def construct(self):
+        axes = ThreeDAxes()
+        sphere = Surface(
+            lambda u, v: np.array([
+                u,
+                v,
+                0
+            ]), v_range=[0, TAU], u_range=[-PI / 2, PI / 2],
+            checkerboard_colors=[RED_D, RED_E], resolution=(15, 32)
+        )
+        self.renderer.camera.light_source.move_to(3*IN) # changes the source of the light
+        self.set_camera_orientation(phi=90 * DEGREES, theta=0 * DEGREES)
+        self.add(axes, sphere)
+
+class CombinedScene(Scene):
+    
+    def constuct(self):
+        pass

tests/test_neural_network.py

@@ -107,18 +107,18 @@ class NeuralNetworkScene(Scene):
 
         self.play(forward_propagation_animation)
 
-class ImageNeuralNetworkScene(Scene):
+class GrayscaleImageNeuralNetworkScene(Scene):
 
     def construct(self):
         image = Image.open('images/image.jpeg')
         numpy_image = np.asarray(image)
         # Make nn
         layers = [
-            ImageLayer(numpy_image, height=1.4),
-            FeedForwardLayer(3), 
+            FeedForwardLayer(3),
             FeedForwardLayer(5),
             FeedForwardLayer(3),
-            FeedForwardLayer(6)
+            FeedForwardLayer(6),
+            ImageLayer(numpy_image, height=1.4)
         ]
         nn = NeuralNetwork(layers)
         nn.scale(1.3)
@@ -129,6 +129,27 @@ class ImageNeuralNetworkScene(Scene):
         self.play(nn.make_forward_pass_animation(run_time=5))
         self.play(nn.make_forward_pass_animation(run_time=5))
 
+class ImageNeuralNetworkScene(Scene):
+
+    def construct(self):
+        image = Image.open('../assets/gan/real_image.jpg')
+        numpy_image = np.asarray(image)
+        # Make nn
+        layers = [
+            FeedForwardLayer(3),
+            FeedForwardLayer(5),
+            FeedForwardLayer(3),
+            FeedForwardLayer(6),
+            ImageLayer(numpy_image, height=1.4)
+        ]
+        nn = NeuralNetwork(layers)
+        nn.scale(1.3)
+        # Center the nn
+        nn.move_to(ORIGIN)
+        self.add(nn)
+        # Play animation
+        self.play(nn.make_forward_pass_animation(run_time=5))
+        self.play(nn.make_forward_pass_animation(run_time=5))
 
 class EmbeddingNNScene(Scene):
 
@@ -174,7 +195,7 @@ class LayerRemovalScene(Scene):
         image = Image.open('images/image.jpeg')
         numpy_image = np.asarray(image)
 
-        layer = FeedForwardLayer(5),
+        layer = FeedForwardLayer(5)
         layers = [
             ImageLayer(numpy_image, height=1.4),
             FeedForwardLayer(3), 
@@ -186,7 +207,34 @@ class LayerRemovalScene(Scene):
         nn = NeuralNetwork(layers)
         
         self.play(Create(nn))
-        self.play(nn.remove_layer(layer))
+        remove_animation = nn.remove_layer(layer)
+        print("before remove")
+        self.play(remove_animation)
+        print(nn)
+        print("after remove")
+
+class LayerInsertionScene(Scene):
+
+    def construct(self):
+        image = Image.open('images/image.jpeg')
+        numpy_image = np.asarray(image)
+
+        layers = [
+            ImageLayer(numpy_image, height=1.4),
+            FeedForwardLayer(3),
+            FeedForwardLayer(3),
+            FeedForwardLayer(6)
+        ]
+
+        nn = NeuralNetwork(layers)
+        
+        self.play(Create(nn))
+
+        layer = FeedForwardLayer(5)
+        insert_animation = nn.insert_layer(layer, 4)
+        self.play(insert_animation)
+        print(nn)
+        print("after remove")
 
 if __name__ == "__main__":
     """Render all scenes"""

tests/test_variational_autoencoder.py

@@ -1,19 +1,17 @@
 from manim import *
 from PIL import Image
-from manim_ml.neural_network.embedding import EmbeddingLayer
-from manim_ml.neural_network.feed_forward import FeedForwardLayer
-from manim_ml.neural_network.image import ImageLayer
+from manim_ml.neural_network.layers import EmbeddingLayer, FeedForwardLayer, ImageLayer
 from manim_ml.neural_network.neural_network import NeuralNetwork
 
 config.pixel_height = 720
 config.pixel_width = 1280
-config.frame_height = 6.0
-config.frame_width = 6.0
+config.frame_height = 8.0
+config.frame_width = 8.0
 
 class VariationalAutoencoderScene(Scene):
 
     def construct(self):
-        embedding_layer = EmbeddingLayer()
+        embedding_layer = EmbeddingLayer(dist_theme="ellipse").scale(2)
         
         image = Image.open('images/image.jpeg')
         numpy_image = np.asarray(image)
@@ -26,7 +24,7 @@ class VariationalAutoencoderScene(Scene):
             FeedForwardLayer(3),
             FeedForwardLayer(5),
             ImageLayer(numpy_image, height=1.4),
-        ])
+        ], layer_spacing=0.1)
 
         neural_network.scale(1.3)