- A "tracer" per etherdream/laser that take its point list, correct geometry, recompute in etherdreams coordinates, send it to its controller,... and report etherdream status to the manager.
- A "manager" that talk to all tracers (which client number point lists to draw, new geometry correction,...), handle the webui functions, OSC commands,...
- To share the lasers between people, LJ accept up to 4 virtual "clients" that can simultaneously send one point list per laser. You select in WebUI wich client is actually sent to lasers.
Needs at least : an etherdream DAC connected to an ILDA laser, RJ 45 IP network (gigabits only !! no wifi, 100 mpbs doesn't work well with several lasers)
- Web ui : In your browser open webui/index.html. Javascript is needed. By default it connect to localhost. If you want to control a remote server, you need to change the uri line in LJ.js.
- A compiled version for os x and linux of nannou.org etherdream+laser emulator is included. For more informations, like license see https://github.com/nannou-org/ether-dream
1/ Say the laser server computer (running LJ) IP is 192.138.1.13, the client computer is 192.168.1.52, First remember to check on the server computer if the redis server is listening to the right IP :
The server approach is based on redis, so you write and run your laser client software in any redis capable programming langage (50+ : https://redis.io/clients).
LJ is network based and this is *critical and flickering reason #1* if not managed properly, especially if you have several lasers.
Our "always working solution", as we regularly move our gear for different venues :
We use static network configuration. Our Etherdreams controllers have static IPs defined in their SDcard from 192.168.1.1 to 192.168.1.9. Because wifi will always finally sucks for many reasons, our computers (laser server and clients) are *gigabits wired connected* with 192.168.1.10 and after. Don't trust end user gear marketing on wifi, we have a big gigabits switch for laser only stuff. We provide Internet through wifi on different network like 192.168.2.x
Even if etherdreams are 100 Mbits, we use gigabits gear.
You need to update LJ.conf to your network/etherdreams IPs and be sure to check command arguments : python main.py --help
The need for a dedicated computer to act as "laser server" usually depends on how many lasers you want to control and your main computer load. If you seen flickering with small point lists, try the dedicated computer option and/or stop process interfering like redis monitoring,...
This program suppose that the ether dream is configured in a certain way especially for its IP address. We write an autoplay.txt file inside an SD Card within the ether dream DAC, with the following lines you can adjust i.e for pps or fps. Yes, there is a builtin DHCP client in the ether dream DAC but if you run multiple lasers, having a fixed dedicated network makes you focus on laser stuff.
About hardware setup, especially if you have several lasers : ILDA cables are insanely expensive. You may consider the Power Over Ethernet 'POE' option. Buy a very small ILDA cable, a POE splitter and connect everything to the ether dream fixed near your laser. You can have then a simple and very long network cable and use a Power Over Ethernet injector or switch close to the driving computer. Beware some vendors use 24V POE Injector : POE injectors and splitters must match.
