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drewp@bigasterisk.com - 16 years ago 2008-10-14 06:34:50
drewp@bigasterisk.com
final version of baypiggies2008 talk
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pre {
 
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pre.file {
 
  border: 1px solid #aaa;
 
  border-bottom: 0;
 
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  background: #eef;
 
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</head>
 
<body>
 
@@ -55,9 +62,10 @@ pre {
 
  <h1>Existing system</h1>
 
From my June 2005 presentation:
 
 
<pre>
 
<pre style="font-size: 60%">
 
 
               (play cmds)
 
    ascoltami --------------> mpd ----------> audio out
 
    ascoltami -----------> mpd ------> audio out
 
        | (timing)
 
        v
 
    curvecalc    subcomposer    keyboardcomposer
 
@@ -71,8 +79,8 @@ From my June 2005 presentation:
 
                    | (dmx levels)
 
          ......... v ....................
 
          .      entec open dmx          .
 
          .         | (dmx)              . external hardware
 
          .         v                    .
 
external  .         | (dmx)              .
 
hardware  .         v                    .
 
          .      dmx dimmer              .
 
          .         | (juice)            .
 
          .         v                    .
 
@@ -97,54 +105,211 @@ From my June 2005 presentation:
 
 
<div class="slide">
 
  <h1>What's new: real sliders</h1>
 
  <img src="bcf2000-desk1.jpg"/>
 
  <img src="bcf2000-desk1.jpg" style="float:right; border: 2px solid #005;" width="40%"/>
 
  <ul>
 
    <li>$200 board with 8 motorized faders (plus knobs, lights, and buttons)</li>
 
    <li>Talks midi or usb-midi</li>
 
    <li>Python/linux driver is easy: </li>
 
    <pre>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)))</pre>
 
    <li>Talks midi over usb</li>
 
    <li>Python/linux driver is easy:
 
    <pre>
 
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)))</pre></li>
 
  </ul>
 
</div>
 
 
<div class="slide">
 
  <h1>What's new: RDF for data storage</h1>
 
  <ul>
 
    <li>Old system: ad-hoc text files.</li>
 
    <li>Never do this again.</li>
 
  </ul>
 
</div>
 
 
<div class="slide">
 
  <h1>Old file formats</h1>
 
<pre class="file">
 
[music]
 
preSong = silence-4sec.wav
 
postSong = silence-15sec.wav
 
</pre>
 
 
<pre class="file">
 
down-l : 0.32005
 
down-r : 0.3071
 
down-sides : 0.37
 
lo-c-cross : 0.24
 
</pre>
 
 
<pre class="file">
 
scoop-r right(t)
 
lo-fill can(t)
 
ch1 chase(t,names=back_colors, ontime=.6, offset=0) * ch1(t)
 
</pre>
 
 
<pre class="file">
 
patch = {
 
    ('fill-xl','b31',) : 61,
 
    ('broke',  'back8','b32',) : 62,
 
    ('blue-xl','b33broke',) : 63,
 
</pre>
 
</div>
 
 
<div class="slide">
 
  <h1>Storage goals</h1>
 
  <ul>
 
    <li>Stop inventing and extending syntaxes</li>
 
    <li>Stop reloading the files all the time. Get incremental
 
    updates or query data as it's needed.</li>
 
    <li>Fancier data structures</li>
 
    <li>Arbitrary layout of files on disk</li>
 
    <li>Keep using my most flexible editor (emacs)</li>
 
  </ul>
 
</div>
 
 
<div class="slide">
 
  <h1>New system: RDF</h1>
 
  <ul>
 
    <li>Most files are RDF data (saved as .n3 or ntriples)</li>
 
    <li>Syntax(es) are already done, and all values are unambiguously labeled</li>
 
    <li>Complex data types and relationships are almost as easy as basic ones</li>
 
    <li>Extensible and upgradable, of course</li>
 
    <li>Used DSLs and logic programming to abbreviate boring parts</li>
 
  </ul>
 
</div>
 
 
<div class="slide">
 
  <h1>What's new: RDF for most data storage</h1>
 
<ul>
 
  <li>Old system: ad-hoc text files. Never do this.</li>
 
  <li>Now: most files are RDF data (saved as .n3 or ntriples)</li>
 
  <h1>New data, shown as n3</h1>
 
<pre class="file" style="font-size: 80%">
 
@prefix : &lt;http://light9.bigasterisk.com/&gt; .
 
@prefix sub: &lt;http://light9.bigasterisk.com/sub/&gt; .
 
@prefix t: &lt;http://light9.bigasterisk.com/show/dance2008/&#x2936;
 
           song10/subterm/&gt; .
 
 
  complex data structures (objects with types and attributes, attrs, lists, sets, references between files)
 
  use DSLs to abbreviate boring parts
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10&gt;
 
     :subterm   t:blacklight,
 
                t:song10,
 
                t:song3black .
 
t:song10 a :Subterm;
 
         :expression "song10(t)";
 
         :sub sub:song10 .
 
t:blacklight a :Subterm;
 
             :expression "blacklight(t)&gt;0";
 
             :sub sub:blacklight .
 
       </pre>
 
</div>
 
 
 
<div class="slide">
 
  <h1>What's new: lightsim</h1>
 
  <h1>The same data, in xml</h1>
 
  <pre style="font-size: 45%; line-height: 1.3em;">
 
&lt;rdf:RDF xmlns="http://light9.bigasterisk.com/"
 
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"&gt;
 
 
    &lt;rdf:Description rdf:about="http://light9.bigasterisk.com/show/dance2008/song10"&gt;
 
        &lt;subterm rdf:resource="http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight"/&gt;
 
        &lt;subterm rdf:resource="http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10"/&gt;
 
        &lt;subterm rdf:resource="http://light9.bigasterisk.com/show/dance2008/song10/subterm/song3black"/&gt;
 
    &lt;/rdf:Description&gt;
 
 
    &lt;Subterm rdf:about="http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight"&gt;
 
        &lt;expression&gt;blacklight(t)&amp;gt;0&lt;/expression&gt;
 
        &lt;sub rdf:resource="http://light9.bigasterisk.com/sub/blacklight"/&gt;
 
    &lt;/Subterm&gt;
 
 
    &lt;Subterm rdf:about="http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10"&gt;
 
        &lt;expression&gt;song10(t)&lt;/expression&gt;
 
        &lt;sub rdf:resource="http://light9.bigasterisk.com/sub/song10"/&gt;
 
    &lt;/Subterm&gt;
 
&lt;/rdf:RDF&gt;
 
</pre>
 
</div>
 
 
<div class="slide">
 
  <h1>A simple line-based format</h1>
 
  <pre style="font-size: 45%;">
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10&gt; &lt;http://light9.bigasterisk.com/subterm&gt;&#x2936;
 
  &lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight&gt; .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10&gt; &lt;http://light9.bigasterisk.com/subterm&gt;&#x2936;
 
  &lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10&gt; .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10&gt; &lt;http://light9.bigasterisk.com/subterm&gt;&#x2936;
 
  &lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/song3black&gt; .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight&gt;&#x2936;
 
  &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://light9.bigasterisk.com/Subterm&gt; .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight&gt;&#x2936;
 
  &lt;http://light9.bigasterisk.com/expression&gt; "blacklight(t)>0" .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight&gt;&#x2936;
 
  &lt;http://light9.bigasterisk.com/sub&gt; &lt;http://light9.bigasterisk.com/sub/blacklight&gt; .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10&gt;&#x2936;
 
  &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://light9.bigasterisk.com/Subterm&gt; .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10&gt;&#x2936;
 
  &lt;http://light9.bigasterisk.com/expression&gt; "song10(t)" .
 
 
&lt;http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10&gt;&#x2936;
 
  &lt;http://light9.bigasterisk.com/sub&gt; &lt;http://light9.bigasterisk.com/sub/song10&gt; .
 
</pre>
 
 
</div>
 
 
<div class="slide">
 
  <h1>Again, with less wrapping</h1>
 
  <pre style="font-size: 40%;">
 
&lt;http://l9.com/show/dance2008/song10&gt; &lt;http://l9.com/subterm&gt; &lt;http://l9.com/show/dance2008/song10/subterm/blacklight&gt; .
 
&lt;http://l9.com/show/dance2008/song10&gt; &lt;http://l9.com/subterm&gt; &lt;http://l9.com/show/dance2008/song10/subterm/song10&gt; .
 
&lt;http://l9.com/show/dance2008/song10&gt; &lt;http://l9.com/subterm&gt; &lt;http://l9.com/show/dance2008/song10/subterm/song3black&gt; .
 
&lt;http://l9.com/show/dance2008/song10/subterm/blacklight&gt; &lt;http://l9.com/expression&gt; "blacklight(t)>0" .
 
&lt;http://l9.com/show/dance2008/song10/subterm/blacklight&gt; &lt;http://l9.com/sub&gt; &lt;http://l9.com/sub/blacklight&gt; .
 
&lt;http://l9.com/show/dance2008/song10/subterm/blacklight&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://l9.com/Subterm&gt; .
 
&lt;http://l9.com/show/dance2008/song10/subterm/song10&gt; &lt;http://l9.com/expression&gt; "song10(t)" .
 
&lt;http://l9.com/show/dance2008/song10/subterm/song10&gt; &lt;http://l9.com/sub&gt; &lt;http://l9.com/sub/song10&gt; .
 
&lt;http://l9.com/show/dance2008/song10/subterm/song10&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://l9.com/Subterm&gt; .
 
</pre>
 
</div>
 
 
<div class="slide">
 
  <h1>Again, rendered with graphviz</h1>
 
  <img src="rdfgraph.png" />
 
</div>
 
 
<div class="slide">
 
  <h1>What's next: lightsim</h1>
 
  <ul>
 
    <li>We could really use a good way to preview scenes</li>
 
    <li>Lighting follows the superposition principle</li>
 
    <li>Hard to use text labels for all the different lighting scenes</li>
 
    <li>Can't work on lighting cues without looking at the stage</li>
 
  </ul>
 
</div>
 
<div class="slide">
 
  <h1>lightsim enablers</h1>
 
  <ul>
 
    <li>Light obeys superposition: <br/>F(ax+by) = aF(x) + bF(y)</li>
 
    <li>All my lights are computer-controlled</li>
 
  </ul>
 
</div>
 
<div class="slide">
 
  <h1>lightsim demos</h1>
 
  <ul>
 
    <li>Original version from 2002: Tk, PIL</li>
 
    <li>Current version: qt, OpenGL</li>
 
  </ul>
 
</div>
 
 
<div class="slide">
 
<h1>Related projects</h1>
 
<li>vistrails</li>
 
<li>kamaelia</li>
 
  <h1>More</h1>
 
  <li>Links related to this project:<br/>
 
http://delicious.com/drewpca/light9</li>
 
<!--<script type="text/javascript" src="http://feeds.delicious.com/v2/js/drewpca/light9?title=Related%20Delicious%20Bookmarks&icon=s&count=5&bullet=%E2%80%A2&sort=date"></script>-->
 
</div>
 
 
 
 
 
http://www.opendmx.net/index.php/Open_DMX_USB
 
 
 
 
 
 
</div>
 
 
</body>
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