un33k / tableaunoir

An online blackboard with fridge magnets

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tableaunoir

Tableaunoir is an online collaborative blackboard tool. "Tableau noir" means blackboard in french. The online version is available here: [https://tableaunoir.github.io/] (another one)

Raison d'être

Contrary to plenty of other collaborative boards on the Internet, with Tableaunoir you can create interactive animations via the use of "fridge magnets".

Screenshot of tableaunoir showcasing magnets to illustrate sorting algorithms Screenshot of tableaunoir showcasing magnets to illustrate graph algorithms Screenshot of tableaunoir showcasing magnets to illustrate B-tree algorithms Screenshot of tableaunoir showcasing magnets to illustrate large graph algorithms, using Sim City icons for nodes Screenshot of tableaunoir showcasing a course using colors etc Screenshot of tableaunoir showcasing the latest toolbar, magnets, texts etc

Also Tableaunoir is ideal to give standard lectures. You may divide your board in panels and navigate panel by panel.

A small gif video showcasing the use of tableaunoir in a course on breadth-first search

Features

  • Of course, you can draw and erase, with your mouse or a graphic tablet. You can draw shapes.
  • Collaborate edit the same board at the same time (need a server for that),
  • does not require an account
  • Backgrounds: staffs for teaching music, grid, images and PDF documents
  • You can also use kind of predefined fridge magnets that you can move on the board, to make animation e.g. for illustrating sorting algorithms, graphs algorithms etc (and even playing Go!).
  • Create your own fridge magnets for interactive courses, by importing any image, or by transforming a part of the board (Ctrl + X).
  • Color palette for chalk (c, 7 colors black/white #000000, yellow #FFFF00, orange #FFA500, blue #64ACFF, red #DC143C, pink #DDA0DD, green #32CD32),
  • Draw interative graphs : vertices are magnets, labels of vertices and edges are handwritten but are updated when vertices are moved,
  • Change the color of magnets' background,
  • Load/Save the current board,
  • Export in PNG or PDF,
  • Add texts (Enter and type), and move texts. Supports LaTeX (using MathJax)!
  • Switch to a whiteboard instead of a blackboard,
  • Change from right-handed (default) to left-handed cursor,
  • Divide yourboard in half. Ideal for teaching. Add as many new half-board as you need, going right with and then left/right with ←/→ keyboard arrows,

You can teach online by sharing the screen with Discord, Zoom, Teams, etc, or by sharing a link (need a server for that).

Videos

Showing the first image of the YouTube video https://www.youtube.com/watch?v=P6_lhqiPBow

Examples of use

Give a lecture

Tableaunoir is used for teaching at ENS Rennes. The main advantage is that, by hiding the toolbar, the screen is fully black: there are no buttons that annoy or distract the students (in my personal use, I simply hide the toolbar). Tableaunoir is controlled by a graphic tablet and by the keyboard of the computer (7 keys!). It makes it very interactive compared to fixed slides.

A photo showcasing the use of tableaunoir in a real course taught in an amphitheater (1/3) A photo showcasing the use of tableaunoir in a real course taught in an amphitheater (2/3) A photo showcasing the use of tableaunoir in a real course taught in an amphitheater (3/3)

Share ideas

An idea to explain and share? Tableaunoir enables to write together on shared collaborative boards.

Draw pictures

Tableaunoir can simply be used to draw pictures: [https://team.inria.fr/erable/en/marie-france-sagot/blog/silly-things/]


Commands for the Tableaunoir project

remove all node_modules and install back again

npm ci

Build everything to dist

npm run build

See linter warning/errors

npm run lint

Starts a local node server

npm run serve

Offline version

If you prefer to use an offline version, it is possible. You have to install Electron and then the application can be launched as follows (from the main directory):

$ electron mainElectron.js

Create your own tableaunoir server

In order to share blackboards, you need a server. For installing the server:

  • In the server, first git clone (and then later git pull) the project.
  • Modify the src/config.js.
  • Compile Tableaunoir (see above)
  • Install Apache HTTPD to deploy dist/index.html (other web servers might work too, but have not been tested).
  • Configure the server part, see server/README.md.
  • Then server/run.sh.

This software is open-source under the GPLv3.0 license.

Credits

About

An online blackboard with fridge magnets

License:GNU General Public License v3.0


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