rebase onto upstream

.travis.yml

@@ -4,6 +4,10 @@ dist: xenial    # required for Python 3.7 (travis-ci/travis-ci#9069)
 python: "3.7"
 cache: pip
 
+addons:
+  apt:
+    packages:
+      - python3-sphinx
 install:
   - pip install --upgrade pip
   - pip install -r requirements.txt
@@ -16,6 +20,8 @@ before_script:
 script:
   - python setup.py test
   - python setup.py bdist_wheel
+after_success:
+  - test $TRAVIS_BRANCH = "master" && test $TRAVIS_PULL_REQUEST = "false" && travis/build_docs.sh
 deploy:
   provider: pypi
   user: eulertour

README.md

@@ -1,4 +1,5 @@
-# Manim - Mathematical Animation Engine
+<img src="logo/cropped.png"/>
+
 [![Documentation Status](https://readthedocs.org/projects/manim/badge/?version=latest)](https://manim.readthedocs.io/en/latest/?badge=latest)
 [![Build Status](https://travis-ci.org/3b1b/manim.svg?branch=master)](https://travis-ci.org/3b1b/manim)
 [![MIT License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat)](http://choosealicense.com/licenses/mit/)
@@ -87,15 +88,17 @@ Try running the following:
 ```sh
 python3 -m manim example_scenes.py SquareToCircle -pl
 ```
-The -p is for previewing, meaning the video file will automatically open when it is done rendering.
-Use -l for a faster rendering at a lower quality.
-Use -s to skip to the end and just show the final frame.
-Use -n (number) to skip ahead to the n'th animation of a scene.
-Use -f to show the file in finder (for osx)
+The `-p` flag in the command above is for previewing, meaning the video file will automatically open when it is done rendering. The `-l` flag is for a faster rendering at a lower quality.
+
+Some other useful flags include:
+
+* `-s` to skip to the end and just show the final frame.
+* `-n <number>` to skip ahead to the `n`'th animation of a scene.
+* `-f` to show the file in finder (for OSX).
 
-Set MEDIA_DIR environment variable to determine where image and animation files will be written.
+Set `MEDIA_DIR` environment variable to specify where the image and animation files will be written.
 
-Look through the old_projects folder to see the code for previous 3b1b videos.  Note, however, that developments are often made to the library without considering backwards compatibility on those old_projects.  To run them with a guarantee that they will work, you will have to go back to the commit which complete that project.
+Look through the `old_projects` folder to see the code for previous 3b1b videos.  Note, however, that developments are often made to the library without considering backwards compatibility with those old projects.  To run an old project with a guarantee that it will work, you will have to go back to the commit which completed that project.
 
 While developing a scene, the `-sp` flags are helpful to just see what things look like at the end without having to generate the full animation.  It can also be helpful to use the `-n` flag to skip over some number of animations.
 

active_projects/ode/all_part3_scenes.py

@@ -0,0 +1,13 @@
+from active_projects.ode.part3.staging import *
+from active_projects.ode.part3.temperature_graphs import *
+
+
+OUTPUT_DIRECTORY = "ode/part3"
+SCENES_IN_ORDER = [
+    FourierSeriesIllustraiton,
+    FourierNameIntro,
+    CircleAnimationOfF,
+    LastChapterWrapper,
+    ThreeMainObservations,
+    SimpleSinExpGraph,
+]

active_projects/ode/name_animations.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+from manimlib.imports import *
+from active_projects.ode.part2.fourier_series import FourierOfName
+
+name_color_pairs = [
+
+]
+
+circle_counts = [
+    # 10,
+    # 25,
+    100,
+]
+
+if __name__ == "__main__":
+    for name, color in name_color_pairs:
+        for n_circles in circle_counts:
+            try:
+                first_name = name.split(" ")[0]
+                scene = FourierOfName(
+                    name_text=name,
+                    name_color=color,
+                    n_circles=n_circles,
+                    file_writer_config={
+                        "write_to_movie": True,
+                        "output_directory": os.path.join(
+                            "patron_fourier_names",
+                            first_name,
+                        ),
+                        "file_name": "{}_Fouierified_{}_Separate_paths".format(
+                            first_name,
+                            n_circles
+                        ),
+                    },
+                    camera_config={
+                        "frame_rate": 24,
+                    },
+                )
+            except:
+                pass

active_projects/ode/part2/fourier_series.py

@@ -313,12 +313,7 @@ def construct(self):
         coefs = self.get_coefficients_of_path(path)
 
         circles = self.get_circles(coefficients=coefs)
-        for k, circle in zip(it.count(1), circles):
-            circle.set_stroke(width=max(
-                1 / np.sqrt(k),
-                1,
-            ))
-
+        self.set_decreasing_stroke_widths(circles)
         # approx_path = self.get_circle_end_path(circles)
         drawn_path = self.get_drawn_path(circles)
         if self.start_drawn:
@@ -329,6 +324,14 @@ def construct(self):
         self.add(drawn_path)
         self.wait(self.run_time)
 
+    def set_decreasing_stroke_widths(self, circles):
+        for k, circle in zip(it.count(1), circles):
+            circle.set_stroke(width=max(
+                1 / np.sqrt(k),
+                1,
+            ))
+        return circles
+
     def get_path(self):
         tex_mob = TexMobject(self.tex)
         tex_mob.set_height(6)
@@ -338,6 +341,51 @@ def get_path(self):
         return path
 
 
+class FourierOfName(FourierOfPiSymbol):
+    CONFIG = {
+        "n_circles": 100,
+        "name_color": WHITE,
+        "name_text": "Abc",
+        "time_per_symbol": 5,
+        "slow_factor": 1 / 5,
+    }
+
+    def construct(self):
+        name = TextMobject(self.name_text)
+        max_width = FRAME_WIDTH - 2
+        max_height = FRAME_HEIGHT - 2
+        name.set_width(max_width)
+        if name.get_height() > max_height:
+            name.set_height(max_height)
+
+        circles = VGroup(VectorizedPoint())
+        for path in name.family_members_with_points():
+            for subpath in path.get_subpaths():
+                sp_mob = VMobject()
+                sp_mob.set_points(subpath)
+                coefs = self.get_coefficients_of_path(sp_mob)
+                new_circles = self.get_circles(
+                    coefficients=coefs
+                )
+                self.set_decreasing_stroke_widths(new_circles)
+                drawn_path = self.get_drawn_path(new_circles)
+                drawn_path.clear_updaters()
+                drawn_path.set_stroke(self.name_color, 3)
+
+                new_circles.suspend_updating()
+                self.play(ReplacementTransform(circles, new_circles))
+                new_circles.resume_updating()
+                circles = new_circles
+                self.play(
+                    ShowCreation(drawn_path),
+                    rate_func=linear,
+                    run_time=self.time_per_symbol
+                )
+                circles.suspend_updating()
+        self.play(FadeOut(circles))
+        self.wait(3)
+
+
 class FourierOfPiSymbol5(FourierOfPiSymbol):
     CONFIG = {
         "n_circles": 5,
@@ -479,7 +527,7 @@ class FourierNDQ(FourierOfTrebleClef):
 
     def get_shape(self):
         path = VMobject()
-        shape = TexMobject("Hayley")
+        shape = TexMobject("NDQ")
         for sp in shape.family_members_with_points():
             path.append_points(sp.points)
         return path