This is a software simulation of the Turing Tumble, an amazing programmable marble-powered computer. It runs entirely in your browser, so you can try it out here. If you've used an actual Turing Tumble, it should be straightforward to get started, but here's some documentation about how to use it. If you got here but haven't used an actual Turing Tumble yet, you may need one in your life!

It uses pixi.js for graphics and interaction, and matter.js to simulate the physics of balls dropping through the board. It's written in TypeScript and uses GNU make as a build system. All the graphics and the vertices for the physics engine are generated from InkScape SVG files.

Here are some things I'd like to implement in the near future:

• Wrap toolbar buttons when the screen height is small
• Support for touch events
• Select one or more parts and cut/copy/paste/move them
• Keyboard shortcuts
• Undo/redo
• Allow toggling of whether parts are locked (for setting up challenges)

Please file an issue if you find a bug that doesn't have one yet. Or if you have the will and the skill and feel like doing something nice, fix it yourself and submit a pull request. Feature requests are also welcome, and especially so if you can suggest a way to add the feature with minimal complication of the interface. Note that this is a hobby project, so it could take some time for me to respond.

I've developed and tested it on the latest version of Chrome, and the code should be standards-compliant enough that recent versions of Firefox will probably work as well. I'm not that interested in working around any quirks of platform-specific browsers like Safari or Edge, but will merge in basic fixes if anyone cares enough to make a pull request. Also note that the graphics may be slow/jerky if WebGL doesn't work for whatever reason.

If you'd like to build the project yourself, you'll need at least the following:

• GNU make to run the build
• node.js to run TypeScript and npm
• npm to install dependencies
• Python 3 for various custom build scripts (tested on 3.8)

To edit and re-build the graphics and physics assets, you'll need:

• InkScape to edit and rasterize SVG files
• ImageMagick for some image conversion operations

The build process is very likely to work well on Linux, will probably kind of work on macOS, and is very unlikely to work on Windows. Go to the root directory of the project in your console, and run make to build the whole thing. Running make server will start a web server that serves the application on localhost:8080. Running make watch will watch TypeScript files for changes and automatically rebuild. There are also some handy targets if you're working on just one part of the project: make graphics updates the image assets and make physics updates the physics assets. Note that the physics target actually generates code, so you'll need to rebuild or have make watch running to see any effects. If things get really messed up, you can always run make clean to delete all the targets and start over.

It's licensed under the terms of the unlicense, so you can pretty much do whatever you like with it.