Re: [chuck-users] print absolute time in chuck

Is there a place where this stuff is documented? I can't find anything about it on the website http://chuck.cs.princeton.edu/doc/program/ On Wed, May 4, 2016 at 2:19 AM, Spencer Salazar wrote:

I think the best way to do this is with a chugin. If you know any C++ it would be very easy to write a chugin that simply wraps C time() or whatever OS-dependent function gives you time in milliseconds or nanoseconds.

Time in programming languages is a surprisingly complex topic (see e.g. [1]); the design of ChucK's now concept (in my opinion, smartly) has no external notion of time, avoiding these issues. Putting this in a chugin would make it a lot easier to grow to the appropriate level of complexity.

spencer

[1] http://infiniteundo.com/post/25326999628/falsehoods-programmers-believe-abou...

On Tue, May 3, 2016 at 1:33 AM, Chiel ten Brinke wrote:

...

The problem with this approach, though, is that it apparently takes a few seconds before the input is processed and the internal chuck timer starts counting. This results in that the times printed by the suggested code always is a few seconds too early. This makes this approach not quite useful for tracking down latency problems.

Is there a way around this caveat, or are there other approaches to print full time?

On Tue, May 3, 2016 at 9:54 AM, Chiel ten Brinke wrote:

...

Here is an improvement over the provided script:

class FullTimeHack { int minutes; int seconds;

// PRECONSTRUCTOR

string datetime; ConsoleInput stdin; // gonna read from here stdin.prompt("") => now; // wait until something comes in while (stdin.more()) { stdin.getLine() => datetime; } // read input //<<< datetime >>>; Std.atoi(datetime.substring(10, 2)) => minutes; Std.atoi(datetime.substring(13, 2)) => seconds; <<< minutes + ":" + seconds >>>;

fun void print_full_time() { (seconds + now/second) % 60 => float new_seconds; (minutes + now/minute) $ int % 60 => int new_minutes; <<< new_minutes + ":" + new_seconds >>>; }

}

FullTimeHack hack; hack.print_full_time();

On Mon, May 2, 2016 at 6:11 PM, Chiel ten Brinke wrote:

...

Thanks for you response. I'm gonna try that out right away,

By the way, wouldn't it be nice if this could be done more easily? Especially since ChucK is really into all the timey wimey stuff :)

On Mon, May 2, 2016 at 10:56 AM, Gonzalo wrote:

...

I had a similar problem a while ago, Perry Cook suggested this, it might be of help:

One way to do it would be to pass it in as an argument or other when you run ChucK. This example uses stdin to read the output of a <date> command in the shell:

// TestDate.ck Perry R. Cook, Dec. 2014 ConsoleInput stdin; // gonna read from here stdin.prompt("") => now; // wait until something comes in string datetime; // date and time string datetimenow; // plus time since chuck invoked tacked on while (stdin.more()) { stdin.getLine() => datetime; } // read input datetime.setCharAt(9,'-'); // replace time string colons datetime.setCharAt(12,'-'); // with dashes instead datetime+"-"+Std.ftoa(now/second,4) => datetimenow; // tack on time since chuck invoked <<< datetimenow >>>; // If you want to continue making updated unique // strings, just keep redoing the datetimenow line 1.5*second => now; datetime+"-"+Std.ftoa(now/second,4) => datetimenow; // tack on time since chuck invoked <<< datetimenow >>>;

To use this:

date +"%m%d%y-%T" | chuck TestDate.ck

Outputs (date-H-M-S-now):

"120614-15-00-09-0.0000" : (string) "120614-15-00-09-1.5000" : (string)

On 2/05/2016 9:53 AM, Chiel ten Brinke wrote:

...

I would like to figure out the source of latency from chuck interacting with another application via OSC. To do that, I want to print timestamps of messages sent and received and compare these. But here's the thing:

How do I print the absolute current time in chuck? The variable `now` only seems to hold the time from the start of the process.

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-- Spencer Salazar Doctoral Candidate Center for Computer Research in Music and Acoustics Stanford University

spencer@ccrma.stanford.edu +1 831.277.4654 https://ccrma.stanford.edu/~spencer/

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