Merge branch 'master' into log-file

Now that #151 has been merged, this branch needs to be updated so work can resume on it.

Author: Aathish Sivasubrahmanian

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,9 +1,34 @@
+<!--- 
 Thanks for contributing to manim!
-
-**Please ensure that your pull request works with the latest version of manim.**
+**Please ensure that your pull request works with the latest version of manim from this repository.**
 You should also include:
+  1. The motivation for making this change (or link the relevant issues)
+  2. How you tested the new behavior (e.g. a minimal working example, before/after
+     screenshots, gifs, commands, etc.) This is rather informal at the moment, but
+     the goal is to show us how you know the pull request works as intended.
+If you don't need any of the optional sections, feel free to delete them to prevent clutter.
+-->
+
+## List of Changes
+<!-- List out your changes one by one like this:
+- Change 1
+- Change 2
+- and so on..
+-->
+
+## Motivation
+<!-- Why you feel your changes are required. -->
+
+## Explanation for Changes
+<!-- How do your changes solve aforementioned problems? -->
+
+## Testing Status
+<!-- Optional, but recommended, your computer specs and what tests you ran with their results, if any -->
+
+## Further Comments
+<!-- Optional, any edits/updates should preferably be written here. -->
+
+## Acknowledgement
+- [ ] I have read the [Contributing Guidelines](https://github.com/ManimCommunity/manim/wiki/Documentation-guidelines-(WIP))
 
-1. The motivation for making this change (or link the relevant issues)
-2. How you tested the new behavior (e.g. a minimal working example, before/after
-screenshots, gifs, commands, etc.) This is rather informal at the moment, but
-the goal is to show us how you know the pull request works as intended.
+<!-- Once again, thanks for helping out by contributing to manim! -->

.github/workflows/ci.yml

@@ -0,0 +1,68 @@
+name: CI
+on:   
+  push:
+      branches:
+        - master
+  pull_request:
+      branches:
+        - master
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python: [3.6, 3.7, 3.8]
+
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python }}
+
+      - name: Install system dependencies (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt update
+          sudo apt install -y ffmpeg
+          sudo apt-get -y install texlive texlive-latex-extra texlive-fonts-extra texlive-latex-recommended texlive-science texlive-fonts-extra tipa
+
+      - name: Install system dependencies (MacOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install openssl readline ffmpeg sox pyenv pyenv-virtualenv
+          brew cask install basictex
+          eval "$(/usr/libexec/path_helper -s)"
+          sudo tlmgr update --self
+          sudo tlmgr install standalone preview doublestroke relsize fundus-calligra wasysym physics dvisvgm.x86_64-darwin dvisvgm rsfs wasy cm-super
+          echo "::set-env name=PATH::$PATH"
+
+      - name: Install system dependencies (Windows)
+        if: runner.os == 'Windows'
+        run: |
+          Try {Invoke-WebRequest https://yihui.org/gh/tinytex/tools/install-windows.bat -O install_tinytex.bat}
+          Catch {Invoke-WebRequest https://raw.githubusercontent.com/yihui/tinytex/master/tools/install-windows.bat -O install_tinytex.bat}
+          Start-Process install_tinytex.bat -NoNewWindow -Wait
+          $env:Path += ";" + $env:APPDATA + "\TinyTeX\bin\win32"
+          tlmgr install standalone preview doublestroke ms setspace rsfs relsize ragged2e fundus-calligra microtype wasysym physics dvisvgm jknapltx wasy cm-super babel-english
+          choco install --no-progress ffmpeg
+          choco install --no-progress sox.portable
+          echo "::set-env name=Path::$env:Path"
+
+      - name: Install Pycairo (Non-Windows)
+        if: runner.os == 'macOS' || runner.os == 'Linux'
+        run: pip install pycairo
+
+      - name: Install Pycairo (Windows)
+        if: runner.os == 'Windows'
+        run: python ./scripts/pycairoinstall.py
+
+      - name: Install manim
+        run: pip install . pytest
+
+      - name: Run tests
+        run: pytest

.travis.yml

@@ -133,4 +133,59 @@ def construct(self):
         )
         self.wait()
 
+class VDictTest(Scene):
+    def construct(self):
+        square = Square().set_color(RED)
+        circle = Circle().set_color(YELLOW).next_to(square, UP)
+
+        # create dict from list of tuples each having key-mobject pair
+        pairs = [('s', square), ('c', circle)]
+        my_dict = VDict(*pairs, show_keys=True)
+
+        # display it just like a VGroup
+        self.play(
+            ShowCreation(my_dict)
+            )
+        self.wait()
+
+        print(my_dict.get_all_submobjects())
+
+        text = TextMobject("Some text").set_color(GREEN).next_to(square, DOWN)
+
+        #add like a VGroup
+        my_dict.add(('t', text))                        
+        self.wait()
+        
+        rect = Rectangle().next_to(text, DOWN)
+        # can also do key assignment like a python dict
+        my_dict['r'] = rect                             
+        print(my_dict.get_all_submobjects())
+
+        # access submobjects like a python dict
+        my_dict['t'].set_color(PURPLE)                  
+        self.play(my_dict['t'].scale, 3)
+        self.wait()
+
+        # also supports python dict styled reassignment
+        my_dict['t'] = TextMobject("Some other text").set_color(BLUE)
+        self.wait()
+
+        # remove submojects by key
+        my_dict.remove('t')                             
+        self.wait()
+
+        self.play(Uncreate(my_dict['s']))
+        self.wait()
+
+        self.play(FadeOut(my_dict['c']))
+        self.wait()
+
+        self.play(FadeOutAndShift(my_dict['r'], DOWN))
+        self.wait()
+
+        # iterate through all submobjects currently associated with my_dict
+        for submob in my_dict.get_all_submobjects():
+            self.play(ShowCreation(submob))
+            self.wait()
+
 # See old_projects folder for many, many more

.travis/linux.sh

@@ -0,0 +1,15 @@
+
+#This is some custom configuration just as an example
+[logger]
+logging_keyword = magenta
+logging_level_notset = dim
+logging_level_debug = yellow
+logging_level_info = dim purple
+logging_level_warning = dim red
+logging_level_error = red
+logging_level_critical = red
+log_level = 
+log_time = dim yellow
+log_message = green
+log_path = dim blue
+