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4 <html xmlns="http://www.w3.org/1999/xhtml">
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7 <title>light9 in 2008</title>
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9 <meta name="generator" content="S5" />
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10 <meta name="version" content="S5 1.1" />
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11 <meta name="presdate" content="20050728" />
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12 <meta name="author" content="Eric A. Meyer" />
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13 <meta name="company" content="Complex Spiral Consulting" />
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34 }
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35 </style>
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36 </head>
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37 <body>
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38
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39 <div class="layout">
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40 <div id="controls"><!-- DO NOT EDIT --></div>
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41 <div id="currentSlide"><!-- DO NOT EDIT --></div>
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42 <div id="header"></div>
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43 <div id="footer">
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44 <h1></h1>
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45 <h2>light9 in 2008</h2>
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46 </div>
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47
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48 </div>
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49
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50
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51 <div class="presentation">
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52
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53 <div class="slide">
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54 <h1>light9 in 2008</h1>
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55 <h2></h2>
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56 <h3>Drew Perttula</h3>
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57 <h4>http://bigasterisk.com/</h4>
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58 </div>
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59
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60
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61 <div class="slide">
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62 <h1>Existing system</h1>
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63 From my June 2005 presentation:
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64
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65 <pre style="font-size: 60%">
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66
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67 (play cmds)
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68 ascoltami -----------> mpd ------> audio out
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69 | (timing)
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70 v
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71 curvecalc subcomposer keyboardcomposer
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72 | | |
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73 +--- | ----+
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74 \----- | --------/
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75 \--+---/
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76 | (light levels)
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77 v
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78 dmxserver
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79 | (dmx levels)
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80 ......... v ....................
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81 . entec open dmx .
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82 external . | (dmx) .
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83 hardware . v .
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84 . dmx dimmer .
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85 . | (juice) .
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86 . v .
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87 . light .
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88 ................................
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89 </pre>
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90
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91 </div>
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92
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93 <div class="slide">
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94 <h1>External libraries</h1>
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95 <ul>
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96 <li>Twisted - event loop and networking, xmlrpc</li>
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97 <li>tk, tix</li>
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98 <li>pympd - my twisted interface to mpd</li>
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99 <li>louie - signals</li>
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100 <li>mpd - music player daemon</li>
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101 <li>rdflib</li>
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102 <li>darcs</li>
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103 </ul>
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104 </div>
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105
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106 <div class="slide">
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107 <h1>What's new: real sliders</h1>
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108 <img src="bcf2000-desk1.jpg" style="float:right; border: 2px solid #005;" width="40%"/>
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109 <ul>
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110 <li>$200 board with 8 motorized faders (plus knobs, lights, and buttons)</li>
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111 <li>Talks midi over usb</li>
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112 <li>Python/linux driver is easy:
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113 <pre>
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114 self.dev = open("/dev/snd/midiC1D0")
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115 b0, which, value = [ord(b) for b in
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116 self.dev.read(3)]
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117 self.dev.write(chr(0xb0) +
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118 chr(which[0]) +
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119 chr(int(value)))</pre></li>
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120 </ul>
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121 </div>
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122
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123 <div class="slide">
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124 <h1>What's new: RDF for data storage</h1>
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125 <ul>
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126 <li>Old system: ad-hoc text files.</li>
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127 <li>Never do this again.</li>
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128 </ul>
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129 </div>
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130
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131 <div class="slide">
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132 <h1>Old file formats</h1>
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133 <pre class="file">
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134 [music]
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135 preSong = silence-4sec.wav
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136 postSong = silence-15sec.wav
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137 </pre>
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138
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139 <pre class="file">
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140 down-l : 0.32005
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141 down-r : 0.3071
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142 down-sides : 0.37
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143 lo-c-cross : 0.24
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144 </pre>
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145
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146 <pre class="file">
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147 scoop-r right(t)
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148 lo-fill can(t)
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149 ch1 chase(t,names=back_colors, ontime=.6, offset=0) * ch1(t)
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150 </pre>
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151
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152 <pre class="file">
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153 patch = {
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154 ('fill-xl','b31',) : 61,
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155 ('broke', 'back8','b32',) : 62,
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156 ('blue-xl','b33broke',) : 63,
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157 </pre>
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158 </div>
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159
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160 <div class="slide">
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161 <h1>Storage goals</h1>
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162 <ul>
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163 <li>Stop inventing and extending syntaxes</li>
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164 <li>Stop reloading the files all the time. Get incremental
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165 updates or query data as it's needed.</li>
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166 <li>Fancier data structures</li>
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167 <li>Arbitrary layout of files on disk</li>
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168 <li>Keep using my most flexible editor (emacs)</li>
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169 </ul>
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170 </div>
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171
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172 <div class="slide">
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173 <h1>New system: RDF</h1>
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174 <ul>
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175 <li>Most files are RDF data (saved as .n3 or ntriples)</li>
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176 <li>Syntax(es) are already done, and all values are unambiguously labeled</li>
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177 <li>Complex data types and relationships are almost as easy as basic ones</li>
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178 <li>Extensible and upgradable, of course</li>
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179 <li>Used DSLs and logic programming to abbreviate boring parts</li>
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468
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180 </ul>
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181 </div>
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182
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183 <div class="slide">
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184 <h1>New data, shown as n3</h1>
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185 <pre class="file" style="font-size: 80%">
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186 @prefix : <http://light9.bigasterisk.com/> .
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187 @prefix sub: <http://light9.bigasterisk.com/sub/> .
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188 @prefix t: <http://light9.bigasterisk.com/show/dance2008/⤶
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189 song10/subterm/> .
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190
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191 <http://light9.bigasterisk.com/show/dance2008/song10>
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192 :subterm t:blacklight,
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193 t:song10,
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194 t:song3black .
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195 t:song10 a :Subterm;
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196 :expression "song10(t)";
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197 :sub sub:song10 .
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198 t:blacklight a :Subterm;
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199 :expression "blacklight(t)>0";
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200 :sub sub:blacklight .
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201 </pre>
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468
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202 </div>
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203
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204
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205 <div class="slide">
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206 <h1>The same data, in xml</h1>
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207 <pre style="font-size: 45%; line-height: 1.3em;">
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208 <rdf:RDF xmlns="http://light9.bigasterisk.com/"
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209 xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
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210
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211 <rdf:Description rdf:about="http://light9.bigasterisk.com/show/dance2008/song10">
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212 <subterm rdf:resource="http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight"/>
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213 <subterm rdf:resource="http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10"/>
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214 <subterm rdf:resource="http://light9.bigasterisk.com/show/dance2008/song10/subterm/song3black"/>
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215 </rdf:Description>
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216
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217 <Subterm rdf:about="http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight">
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218 <expression>blacklight(t)&gt;0</expression>
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219 <sub rdf:resource="http://light9.bigasterisk.com/sub/blacklight"/>
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220 </Subterm>
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221
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222 <Subterm rdf:about="http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10">
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223 <expression>song10(t)</expression>
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224 <sub rdf:resource="http://light9.bigasterisk.com/sub/song10"/>
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225 </Subterm>
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226 </rdf:RDF>
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227 </pre>
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228 </div>
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229
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230 <div class="slide">
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231 <h1>A simple line-based format</h1>
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232 <pre style="font-size: 45%;">
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233 <http://light9.bigasterisk.com/show/dance2008/song10> <http://light9.bigasterisk.com/subterm>⤶
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234 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight> .
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235
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236 <http://light9.bigasterisk.com/show/dance2008/song10> <http://light9.bigasterisk.com/subterm>⤶
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237 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10> .
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238
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239 <http://light9.bigasterisk.com/show/dance2008/song10> <http://light9.bigasterisk.com/subterm>⤶
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240 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/song3black> .
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241
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242 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight>⤶
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243 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm> .
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244
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245 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight>⤶
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246 <http://light9.bigasterisk.com/expression> "blacklight(t)>0" .
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247
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248 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/blacklight>⤶
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249 <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/blacklight> .
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250
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251 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10>⤶
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252 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm> .
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253
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254 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10>⤶
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255 <http://light9.bigasterisk.com/expression> "song10(t)" .
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256
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257 <http://light9.bigasterisk.com/show/dance2008/song10/subterm/song10>⤶
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258 <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/song10> .
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259 </pre>
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260
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261 </div>
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262
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263 <div class="slide">
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264 <h1>Again, with less wrapping</h1>
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265 <pre style="font-size: 40%;">
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266 <http://l9.com/show/dance2008/song10> <http://l9.com/subterm> <http://l9.com/show/dance2008/song10/subterm/blacklight> .
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267 <http://l9.com/show/dance2008/song10> <http://l9.com/subterm> <http://l9.com/show/dance2008/song10/subterm/song10> .
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268 <http://l9.com/show/dance2008/song10> <http://l9.com/subterm> <http://l9.com/show/dance2008/song10/subterm/song3black> .
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269 <http://l9.com/show/dance2008/song10/subterm/blacklight> <http://l9.com/expression> "blacklight(t)>0" .
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270 <http://l9.com/show/dance2008/song10/subterm/blacklight> <http://l9.com/sub> <http://l9.com/sub/blacklight> .
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271 <http://l9.com/show/dance2008/song10/subterm/blacklight> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://l9.com/Subterm> .
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272 <http://l9.com/show/dance2008/song10/subterm/song10> <http://l9.com/expression> "song10(t)" .
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273 <http://l9.com/show/dance2008/song10/subterm/song10> <http://l9.com/sub> <http://l9.com/sub/song10> .
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274 <http://l9.com/show/dance2008/song10/subterm/song10> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://l9.com/Subterm> .
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275 </pre>
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276 </div>
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277
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278 <div class="slide">
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279 <h1>Again, rendered with graphviz</h1>
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280 <img src="rdfgraph.png" />
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281 </div>
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282
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283 <div class="slide">
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284 <h1>What's next: lightsim</h1>
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285 <ul>
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286 <li>We could really use a good way to preview scenes</li>
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287 <li>Hard to use text labels for all the different lighting scenes</li>
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288 <li>Can't work on lighting cues without looking at the stage</li>
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289 </ul>
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290 </div>
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291 <div class="slide">
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292 <h1>lightsim enablers</h1>
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293 <ul>
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294 <li>Light obeys superposition: <br/>F(ax+by) = aF(x) + bF(y)</li>
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295 <li>All my lights are computer-controlled</li>
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296 </ul>
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297 </div>
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298 <div class="slide">
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299 <h1>lightsim demos</h1>
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300 <ul>
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468
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301 <li>Original version from 2002: Tk, PIL</li>
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302 <li>Current version: qt, OpenGL</li>
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303 </ul>
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304 </div>
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305
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306 <div class="slide">
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469
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307 <h1>More</h1>
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308 <li>Links related to this project:<br/>
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309 http://delicious.com/drewpca/light9</li>
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310 <!--<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>-->
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311 </div>
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312
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313 </div>
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314
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315 </body>
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316 </html>
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