manim-slides 4.1.0

Tool for live presentations using manim

Manim Slides

Tool for live presentations using either Manim (community edition) or ManimGL. Manim Slides will automatically detect the one you are using!

NOTE: This project extends the work of manim-presentation, with a lot more features!

• Installation
  • Dependencies
  • Pip install
  • Install From Repository
• Usage
  • Basic Example
  • Key Bindings
  • Other Examples
• Features and Comparison with Original manim-presentation
• F.A.Q
  • How to increase quality on Windows
• Contributing

Installation

While installing Manim Slides and its dependencies on your global Python is fine, I recommend using a virtualenv for a local installation.

Dependencies

Manim Slides requires either Manim or ManimGL to be installed. Having both packages installed is fine too.

If none of those packages are installed, please refer to their specifc installation guidelines:

• Manim
• ManimGL

Pip Install

The recommended way to install the latest release is to use pip:

pip install manim-slides

Install From Repository

An alternative way to install Manim Slides is to clone the git repository, and install from there:

git clone https://github.com/jeertmans/manim-slides
pip install -e .

Note: the -e flag allows you to edit the files, and observe the changes directly when using Manim Slides

Usage

Using Manim Slides is a two-step process:

1. Render animations using Slide (resp. ThreeDSlide) as a base class instead of Scene (resp. ThreeDScene), and add calls to self.pause() everytime you want to create a new slide.
2. Run manim-slides on rendered animations and display them like a Power Point presentation.

The command-line documentation is available online.

Basic Example

Wrap a series of animations between self.start_loop() and self.stop_loop() when you want to loop them (until input to continue):

# example.py

from manim import *
# or: from manimlib import *
from manim_slides import Slide

class Example(Slide):
    def construct(self):
        circle = Circle(radius=3, color=BLUE)
        dot = Dot()

        self.play(GrowFromCenter(circle))
        self.pause()  # Waits user to press continue to go to the next slide

        self.start_loop()  # Start loop
        self.play(MoveAlongPath(dot, circle), run_time=2, rate_func=linear)
        self.end_loop()  # This will loop until user inputs a key

        self.play(dot.animate.move_to(ORIGIN))
        self.pause()  # Waits user to press continue to go to the next slide

        self.wait()  # The presentation directly exits after last animation

You must end your Slide with a self.play(...) or a self.wait(...).

First, render the animation files:

manim example.py
# or
manimgl example.py

To start the presentation using Scene1, Scene2 and so on simply run:

manim-slides [OPTIONS] Scene1 Scene2...

Or in this example:

manim-slides Example

Key Bindings

The default key bindings to control the presentation are:

Keybinding	Action
Right Arrow	Continue/Next Slide
Left Arrow	Previous Slide
R	Replay Current Slide
V	Reverse Current Slide
Spacebar	Play/Pause
Q	Quit

You can run the configuration wizard to change those key bindings:

manim-slides wizard

Alternatively you can specify different key bindings creating a file named .manim-slides.json with the keys: QUIT CONTINUE BACK REVERSE REWIND and PLAY_PAUSE.

A default file can be created with:

manim-slides init

NOTE: manim-slides uses cv2.waitKeyEx() to wait for keypresses, and directly registers the key code.

Other Examples

Other examples are available in the example.py file, if you downloaded the git repository.

Below is a small recording of me playing with the slides back and forth.

Features and Comparison with original manim-presentation

Below is a non-exhaustive list of features:

Feature	manim-slides	manim-presentation
Support for Manim	:heavy_check_mark:	:heavy_check_mark:
Support for ManimGL	:heavy_check_mark:	:heavy_multiplication_x:
Configurable key bindings	:heavy_check_mark:	:heavy_check_mark:
Configurable paths	:heavy_check_mark:	:heavy_multiplication_x:
Play / Pause slides	:heavy_check_mark:	:heavy_check_mark:
Next / Previous slide	:heavy_check_mark:	:heavy_check_mark:
Replay slide	:heavy_check_mark:	:heavy_check_mark:
Reverse slide	:heavy_check_mark:	:heavy_multiplication_x:
Multiple key per actions	:heavy_check_mark:	:heavy_multiplication_x:
One command line tool	:heavy_check_mark:	:heavy_multiplication_x:
Robust config file parsing	:heavy_check_mark:	:heavy_multiplication_x:
Support for 3D Scenes	:heavy_check_mark:	:heavy_multiplication_x:
Documented code	:heavy_check_mark:	:heavy_multiplication_x:
Tested on Unix, macOS, and Windows	:heavy_check_mark:	:heavy_multiplication_x:

F.A.Q

How to increase quality on Windows

On Windows platform, one may encounter a lower image resolution than expected. Usually, this is observed because Windows rescales every application to fit the screen. As found by @arashash, in #20, the problem can be addressed by changing the scaling factor to 100%:

in Settings->Display.

Contributing

Contributions are more than welcome!