What happens if you give a bunch of hackers the ability to change pixel colors on a projector screen? See yourself :)
Pixelflut is a very simple (and inefficient) ASCII based network protocol to draw pixels on a screen. You can write a basic client in a single line of shell code if you want, but you only get to change a single pixel at a time. If you want to get rectangles, lines, text or images on the screen you have to implement that functionality yourself. That is part of the game.
Pixelflut defines four main commands that are always supported to get you started:
HELP: Returns a short introductional help text.SIZE: Returns the size of the canvas in pixel.PX <x> <y>Return the current color of a pixel at position (x, y).PX <x> <y> <rrrggbb(aa)>: Draw a single pixel at position (x, y) with the specified hex color code. If the color code contains an alpha channel value, it is blended with the current color of the pixel.
You can send multiple commands over the same TCP socket by terminating each command with a single newline character (\n).
Example: echo "PX 23 42 ff8000" | netcat pixelflut.example.com 1337
This repository contains multiple implementations of the pixelflut protocol. Pull requests for additional implementations or improvements are always welcomed.
Server written in Python, based on gevent and pygame. Easy to hack with, but a bit slow.
cd pixelflut
sudo apt-get install python-gevent python-pygame python-cairo
mkdir save
python pixelflut.py brain.py
Server written in Java8, based on netty and awt. Optimized for speed and large player groups, fast networks or high resolution projectors.
cd pixelwar
sudo apt-get install maven openjdk-8-jdk
mvn package
java -jar target/pixelwar*-jar-with-dependencies.jar
Server written in C, based on libevent2, OpenGL, GLFW and pthreads. It won't get any faster than this.
cd pixelnuke
sudo apt-get install build-essential libevent-dev libglew-dev libglfw3-dev
make
./pixelnuke
Pull requests that improve performance or portability (e.g. Windows or RasPI) are always welcomed.
Pixelflut at EasterHegg 2014 in Stuttgart, Germany http://vimeo.com/92827556
Pixelflut Bar (SHA2017) https://wiki.sha2017.org/w/Pixelflut_bar https://www.youtube.com/watch?v=1Jt-X437MKM
Pixelflut GPN17 Badge https://www.youtube.com/watch?v=JGg4zqqumvs