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7 <title>light9 in 2008</title>
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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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29 </head>
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30 <body>
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31
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32 <div class="layout">
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33 <div id="controls"><!-- DO NOT EDIT --></div>
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34 <div id="currentSlide"><!-- DO NOT EDIT --></div>
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35 <div id="header"></div>
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36 <div id="footer">
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37 <h1></h1>
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38 <h2>light9 in 2008</h2>
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39 </div>
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40
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41 </div>
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42
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43
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44 <div class="presentation">
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45
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46 <div class="slide">
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47 <h1>light9 in 2008</h1>
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48 <h2></h2>
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49 <h3>Drew Perttula</h3>
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50 <h4>http://bigasterisk.com/</h4>
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51 </div>
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52
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53
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54 <div class="slide">
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55 <h1>Existing system</h1>
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56 From my June 2005 presentation:
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57
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58 <pre>
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59 (play cmds)
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60 ascoltami --------------> mpd ----------> audio out
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61 | (timing)
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62 v
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63 curvecalc subcomposer keyboardcomposer
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64 | | |
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65 +--- | ----+
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66 \----- | --------/
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67 \--+---/
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68 | (light levels)
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69 v
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70 dmxserver
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71 | (dmx levels)
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72 ......... v ....................
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73 . entec open dmx .
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74 . | (dmx) . external hardware
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75 . v .
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76 . dmx dimmer .
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77 . | (juice) .
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78 . v .
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79 . light .
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80 ................................
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81 </pre>
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82
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83 </div>
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84
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85 <div class="slide">
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86 <h1>External libraries</h1>
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87 <ul>
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88 <li>Twisted - event loop and networking, xmlrpc</li>
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89 <li>tk, tix</li>
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90 <li>pympd - my twisted interface to mpd</li>
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91 <li>louie - signals</li>
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92 <li>mpd - music player daemon</li>
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93 <li>rdflib</li>
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94 <li>darcs</li>
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95 </ul>
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96 </div>
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97
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98 <div class="slide">
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99 <h1>What's new: real sliders</h1>
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100 <img src="bcf2000-desk1.jpg"/>
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101 <ul>
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102 <li>$200 board with 8 motorized faders (plus knobs, lights, and buttons)</li>
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103 <li>Talks midi or usb-midi</li>
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104 <li>Python/linux driver is easy: </li>
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105 <pre>self.dev = open("/dev/snd/midiC1D0")
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106 b0, which, value = [ord(b) for b in self.dev.read(3)]
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107 self.dev.write(chr(0xb0) + chr(which[0]) + chr(int(value)))</pre>
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108 </ul>
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109 </div>
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110
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111 <div class="slide">
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112 <h1>What's new: RDF for most data storage</h1>
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113 <ul>
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114 <li>Old system: ad-hoc text files. Never do this.</li>
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115 <li>Now: most files are RDF data (saved as .n3 or ntriples)</li>
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116
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117 complex data structures (objects with types and attributes, attrs, lists, sets, references between files)
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118 use DSLs to abbreviate boring parts
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119
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120 </div>
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121
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122
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123 <div class="slide">
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124 <h1>What's new: lightsim</h1>
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125 <ul>
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126 <li>We could really use a good way to preview scenes</li>
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127 <li>Lighting follows the superposition principle</li>
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128 <li>Original version from 2002: Tk, PIL</li>
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129 <li>Current version: qt, OpenGL</li>
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130 </ul>
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131 </div>
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132
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133 <div class="slide">
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134 <h1>Related projects</h1>
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135 <li>vistrails</li>
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136 <li>kamaelia</li>
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137 </div>
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138
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139
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140
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141
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142 http://www.opendmx.net/index.php/Open_DMX_USB
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143
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144
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145
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146
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147
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148 </div>
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149
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150 </body>
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151 </html>
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