+
+
+
light9 in 2008
+
+Drew Perttula
+http://bigasterisk.com/
+
+
+
+
+
Existing system
+From my June 2005 presentation:
+
+
+ (play cmds)
+ ascoltami --------------> mpd ----------> audio out
+ | (timing)
+ v
+ curvecalc subcomposer keyboardcomposer
+ | | |
+ +--- | ----+
+ \----- | --------/
+ \--+---/
+ | (light levels)
+ v
+ dmxserver
+ | (dmx levels)
+ ......... v ....................
+ . entec open dmx .
+ . | (dmx) . external hardware
+ . v .
+ . dmx dimmer .
+ . | (juice) .
+ . v .
+ . light .
+ ................................
+
+
+
+
+
+
External libraries
+
+ - Twisted - event loop and networking, xmlrpc
+ - tk, tix
+ - pympd - my twisted interface to mpd
+ - louie - signals
+ - mpd - music player daemon
+ - rdflib
+ - darcs
+
+
+
+
+
What's new: real sliders
+
+
+ - $200 board with 8 motorized faders (plus knobs, lights, and buttons)
+ - Talks midi or usb-midi
+ - Python/linux driver is easy:
+
self.dev = open("/dev/snd/midiC1D0")
+ b0, which, value = [ord(b) for b in self.dev.read(3)]
+ self.dev.write(chr(0xb0) + chr(which[0]) + chr(int(value)))
+
+
+
+
+
What's new: RDF for most data storage
+
+ - Old system: ad-hoc text files. Never do this.
+ - Now: most files are RDF data (saved as .n3 or ntriples)
+
+ complex data structures (objects with types and attributes, attrs, lists, sets, references between files)
+ use DSLs to abbreviate boring parts
+
+
+
+
+
+
What's new: lightsim
+
+ - We could really use a good way to preview scenes
+ - Lighting follows the superposition principle
+ - Original version from 2002: Tk, PIL
+ - Current version: qt, OpenGL
+
+
+
+
+
Related projects
+vistrails
+kamaelia
+
+
+
+
+
+http://www.opendmx.net/index.php/Open_DMX_USB
+
+
+
+
+
+