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Upgraded to 1.2.1.3. Ported String funcs. Removed my File I/O stuff s…
…ince ChucK has that now.
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Jim Menard
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Oct 5, 2009
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@@ -8,5 +8,6 @@ current version of this document: | |
| chuck home: | ||
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| http://chuck.cs.princeton.edu/ | ||
| http://chuck.stanford.edu/ | ||
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| --- | ||
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@@ -4,3 +4,4 @@ ChucK Documentation + Tutorials: | |
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| ChucK home: | ||
| http://chuck.cs.princeton.edu/ | ||
| http://chuck.stanford.edu/ | ||
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| //-- | ||
| // name: Smacking.ck | ||
| // desc: class and process for tracking smack events from sudden motion sensor | ||
| // only works with SMS-enabled laptops | ||
| // | ||
| // author: Rebecca Fiebrink + Ge Wang | ||
| // date: 2007 | ||
| //-- | ||
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| // public class | ||
| public class Smacking | ||
| { | ||
| static Event @ the_event; | ||
| } | ||
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| // initialize separately (due to a bug) | ||
| new Event @=> Smacking.the_event; | ||
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| // smack detection threshold (less -> more sensitive) | ||
| 15 => int threshold; | ||
| // pol rate | ||
| .01::second => dur poll_rate; | ||
| // recover time (after smack detection) | ||
| .10::second => dur recover_time; | ||
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| // instantiate a HidIn object | ||
| HidIn hi; | ||
| HidMsg msg; | ||
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| // open tilt sensor | ||
| if( !hi.openTiltSensor() ) | ||
| { | ||
| <<< "tilt sensor unavailable", "" >>>; | ||
| me.exit(); | ||
| } | ||
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| // "doh" | ||
| <<< "hit me!", "" >>>; | ||
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| // remember | ||
| HidMsg last; | ||
| // initialize | ||
| hi.read( 9, 0, last ); | ||
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| // infinite event loop | ||
| while( true ) | ||
| { | ||
| // poll the tilt sensor, expect to get back 3 element array of ints | ||
| hi.read( 9, 0, msg ); | ||
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| // compute difference | ||
| (Math.abs(msg.x - last.x) + Math.abs(msg.y - last.y) + Math.abs(msg.z - last.z)) => int diff; | ||
| // check threshold | ||
| if (diff > threshold) { | ||
| // smack detected! | ||
| // <<< "ouch!" >>>; | ||
| // fire! | ||
| Smacking.the_event.broadcast(); | ||
| // go | ||
| recover_time => now; | ||
| } else { | ||
| // uncomment the following to dynamically calibrate the smack sensor | ||
| // msg.x => last.x; | ||
| // msg.y => last.y; | ||
| // msg.z => last.z; | ||
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| // advance | ||
| poll_rate => now; | ||
| } | ||
| } |
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| //-- | ||
| // name: Tracking.ck | ||
| // desc: class and process for tracking a peak and amplitutde via FFT | ||
| // the Tracking class can be accessed from external shreds | ||
| // | ||
| // author: Ge Wang + Rebecca Fiebrink | ||
| // date: 2007 | ||
| //-- | ||
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| // public class | ||
| public class Tracking | ||
| { | ||
| static float the_freq; | ||
| static float the_gain; | ||
| static Event @ the_event; | ||
| } | ||
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| // initialize separately (due to a bug) | ||
| new Event @=> Tracking.the_event; | ||
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| // analysis | ||
| adc => PoleZero dcblock => FFT fft => blackhole; | ||
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| // set to block DC | ||
| .99 => dcblock.blockZero; | ||
| // set FFT params | ||
| 2048 => fft.size; | ||
| // window | ||
| Windowing.hamming( fft.size() ) => fft.window; | ||
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| // go for it | ||
| while( true ) | ||
| { | ||
| // take fft | ||
| fft.upchuck() @=> UAnaBlob blob; | ||
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| // find peak | ||
| 0 => float max; float where; | ||
| for( int i; i < blob.fvals().cap()/8; i++ ) | ||
| { | ||
| // compare | ||
| if( blob.fvals()[i] > max ) | ||
| { | ||
| // save | ||
| blob.fvals()[i] => max; | ||
| i => where; | ||
| } | ||
| } | ||
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| // set freq | ||
| (where / fft.size() * (second / samp)) => Tracking.the_freq; | ||
| // set gain | ||
| (max / .5) => Tracking.the_gain; | ||
| // clamp | ||
| if( Tracking.the_gain > 1 ) | ||
| 1 => Tracking.the_gain; | ||
| // fire! | ||
| Tracking.the_event.broadcast(); | ||
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| // hop | ||
| (fft.size()/4)::samp => now; | ||
| } |
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| //-- | ||
| // name: harm.ck | ||
| // desc: using Tracking and Smacking to harmonize | ||
| // | ||
| // author: Rebecca Fiebrink + Ge Wang | ||
| // date: 2007 | ||
| //-- | ||
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| // synthesis | ||
| BlitSaw s => JCRev r => dac; | ||
| 4 => s.harmonics; | ||
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| // set reverb mix | ||
| .05 => r.mix; | ||
| // possible hamonizing intervals | ||
| [ 3-24, 4-12, 7, 9+12 ] @=> int harms[]; | ||
| float the_harm; | ||
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| // interpolate | ||
| float target_freq, curr_freq, target_gain, curr_gain; | ||
| spork ~ ramp_stuff(); | ||
| spork ~ smack_handler(); | ||
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| // go for it | ||
| while( true ) | ||
| { | ||
| // wait for analysis event | ||
| Tracking.the_event => now; | ||
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| // set freq | ||
| Tracking.the_freq * Math.pow(1.059, the_harm) => target_freq; | ||
| // set gain | ||
| Tracking.the_gain => target_gain; | ||
| } | ||
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| // interpolation | ||
| fun void ramp_stuff() | ||
| { | ||
| // mysterious 'slew' | ||
| 0.025 => float slew; | ||
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| // infinite time loop | ||
| while( true ) | ||
| { | ||
| (target_freq - curr_freq) * 1 * slew + curr_freq => curr_freq => s.freq; | ||
| (target_gain - curr_gain) * .25 * slew + curr_gain => curr_gain => s.gain; | ||
| 0.0025::second => now; | ||
| } | ||
| } | ||
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| // handles smack | ||
| fun void smack_handler() | ||
| { | ||
| // go | ||
| while( true ) | ||
| { | ||
| // wait | ||
| Smacking.the_event => now; | ||
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| // choose random interval | ||
| harms[Std.rand2(0,harms.cap()-1)] => the_harm; | ||
| // set freq | ||
| Tracking.the_freq * Math.pow(1.059, the_harm) => target_freq; | ||
| <<< "new interval:", the_harm >>>; | ||
| } | ||
| } |
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