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A polymorphic OSC function?
by Ollie Glass 28 Oct '05

28 Oct '05

Hello Chuckers. Is it possible to receive any OSC event with a single event and function? In my code I create several events like this: recv.event( "/setStep,i,i,i" ) @=> OscEvent oe; recv.event( "/setBpm,f" ) @=> OscEvent obpm; recv.event( "/openWave,i,s" ) @=> OscEvent owave; Then I spork listener threads for each one: fun void bpmListener() { while ( true ) { obpm => now; while ( obpm.nextMsg() != 0 ) { ... spork ~ bpmListener(); fun void openListener() { while ( true ) { owave => now; while ( owave.nextMsg() != 0 ) { ... spork ~ openListener(); etc. So I create an event, function and thread for every OSC message I want to receive. Is there a way to make a polymorphic function that can recieve any OSC event with some if / else statements to switch based on what the message is? Any sample code would be much appreciated. Thanks, Ollie

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Minimal example not working.
by Erik de Castro Lopo 22 Oct '05

22 Oct '05

Hi all, I'm just trying to get a minimal example going. I've currently got this: sinosc s => dac; 440. => s.freq; while(true){ 1::second => now; } When I run it I get: [chuck]: RtApi: no devices found for given stream parameters. [chuck]: cannot initialize audio device (try using --silent/-s) I compiled chuck to run using linux-alsa and I'm running it on an Apple iBook running Debian Linux. ALSA is know to work correctly on this machine. Any help appreciated. Erik -- +-----------------------------------------------------------+ Erik de Castro Lopo +-----------------------------------------------------------+ "Data is not information, Information is not knowledge, Knowledge is not understanding, Understanding is not wisdom." -- Clifford Stoll

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vim syntax highlighting (update)
by Graham Percival 22 Oct '05

22 Oct '05

Eduard, thanks for ck.vim ! Here's how to use vim syntax highlighting if you don't want to copy stuff as root (or if you simply lack root, for example in a computer lab :) ---- echo "syntax on" >> ~/.vimrc mkdir ~/.vim mkdir ~/.vim/syntax cp ck.vim ~/.vim/syntax/ echo "if exists(\"did_load_filetypes\") finish endif augroup filetypedetect au! BufNewFile,BufRead *.ck setf ck augroup END" >> ~/.vim/filetype.vim ---- If you missed ck.vim the first time, you can find it here: https://lists.cs.princeton.edu/pipermail/chuck-users/2005-October/ 000047.html Thanks again, - Graham Percival

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Greetings and an Object oriented question
by Jim Hinds 21 Oct '05

21 Oct '05

Hail, MusicTech Ones of the Chuck persuasion. I appreciate the elegance and difficulty of the design and implementation of Chuck (being a sysProg type). Chuck is damn easy to get going and make great speed into shooting the foot manytimes. It's kind of like building airplanes out of balsa wood when I was a kid: nicks, cut fingers, noxious fumes, Glue stains on mom's kitchen table. But when your done, it FLIES! So, we know we like chuck. A good buddy. great set of OK default parameters to get you going asap. Low CPU load. Good language structure. Real-time modification to any parameter. all the good stuff. Even Objects and classes. So that's where my question comes from: (Yes it's probably in the documentation somewhere, maybe in the past or future, but I haven't found it) For example, suppose I want a class of say, two filters: Echo A and Echo B. I want to have these echo filters internal to the objects, and be able to chuck into and out of the objects. Is this possible and how does the class look? Class echoChamber { Echo a => Echo b; public fun void scrambleSomeInterestingStuff ( <some useful parameters> ) { //inside here we do some magic and then set parameters on a or b } public fun void initializeMe ( ) { //because we don't do constructors this week } //maybe something goes here } //Now we might want a structure like: Mandolin m => echoChamber smallroom => dac; So, my question is: This seems like a reasonable thing for a chuck Object to do, Can It? And how? Thanks, JIm

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feature request: block comments
by Graham Percival 21 Oct '05

21 Oct '05

// instead of // commenting out // each line // of part of // your program %{ it would be really nice if we could use block comments to do it all at once. (although %{ %} might not be the best symbol to use) %} Cheers, - Graham

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Envelope.time (repost)
by Graham Percival 21 Oct '05

21 Oct '05

Greetings, The docs don't say what Envelope.time (from STK) is measured in -- they just says that it's a float. From the code below, I determined that when .target is 0.5, it measures 500::ms (in other words, "2.0 => e.time" takes 1 second to reach the target); when the target is 0.25, it measures 250::ms. Is this proper behavior? I was expecting the time to be... well, more absolute. :) ie 1.0 would mean 1.0 seconds or 1.0 ms. If this _is_ prope behavior, could it be documented? BTW, the example file "sixty.ck" is missing from the 1.2 and 1.2.0.1 source tarballs. Cheers, - Graham Percival ---- envtest.ck 100 => int TIME; sinosc s => Envelope e => dac; 220 => s.freq; 0.5 => e.target; 1.0 => e.time; 0 => int i; while (true) { <<< i*TIME, e.value() >>>; i++; if (e.value() == e.target()) break; TIME::ms=>now; }

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std.abs always does floats
by Graham Percival 21 Oct '05

21 Oct '05

Could std.abs detect if the variables are ints, and return an int if so? 3 => int intfoo; 2 => int intbar; std.abs(intfoo-intbar) => int foobar; result: [foo.ck]:line(3): cannot resolve operator '=>' on types 'float' and 'int'... It's not a big deal to add the $int, but it surprised me when I first encountered it. Cheers, - Graham

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feature requests: included directories and .chuckrc
by Graham Percival 20 Oct '05

20 Oct '05

Since you guys are implementing neat little features so quickly, here's another -- the ability to include directories to search for patches. ie $ chuck -I ~/chucklibs/ foo.ck rec.ck This searches the current dir for foo.ck and rec.ck; if it doesn't find it, then it searches in ~/chucklibs/ This is much easier than doing $ chuck foo.ck ~/src/chuck-1.2.0.2/examples/basic/rec.ck It would also be great if chuck could get configuration details from ~/.chuckrc (such as sample rate and included directories :) Cheers, - Graham

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ChucKML
by Nelson Ferraz 19 Oct '05

19 Oct '05

Hi! I wanted to use ChucK to play some wave files in sequence, so I wrote a small script to read a XML file and generate the ChucK code for me. I called it "ChucKML". Here's a sample ChucKML file: <chuckml> <wave src="wav/snd1.wav" repeat_every="3::second"/> <wave src="wav/snd2.wav" start_after="12::second" repeat_every="6::second"/> <wave src="wav/snd3.wav" start_after="36::second" repeat_every="12::second"/> </chuckml> Sample usage: $ chuckml sample.xml > sample.ck $ chuck sample.ck (The first command generates a .ck file, and the second command plays it.) This is a simple prototype, but I thought someone will find it useful. Perhaps it could be used to introduce ChucK to anyone who can write HTML? Nelson -- Nelson Ferraz GNU BIS - www.gnubis.com.br

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feature request: including files
by Graham Percival 19 Oct '05

19 Oct '05

It would be great if ChucK could include other .ck files. I know you can do machine.add("foo.ck"), but it would be great if we could do it with non-shreds as well. For example, I could have a bunch of functions which I could then include in other projects. You can't machine.add a fun float changevalue ( float foo ) { ... return bar; } Technically speaking, whatever.include("foo.ck"); would simply insert the contents of foo.ck into the original file at the place where whatever.include() was called. Cheers, - Graham

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