[chuck-users] print absolute time in chuck
Iain Emsley
iain.emsley at kellogg.ox.ac.uk
Wed May 4 04:05:30 EDT 2016
Hi Chiel,
The Github for the Chugging is here:
https://github.com/ccrma/chugins
and the extension part of the ChucK site has some notes:
http://chuck.stanford.edu/extend/
There is a paper describing the extension system here:
https://ccrma.stanford.edu/~spencer/publications/CCC2012.pdf
The chuginate code in the repo may provide some additional notes as well in the code comments.
Kind regards,
Iain
Iain Emsley
Research Associate
Oxford e-Research Centre
University of Oxford
On 4 May 2016, at 08:12, Chiel ten Brinke <ctenbrinke at gmail.com<mailto:ctenbrinke at gmail.com>> wrote:
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 <spencer at ccrma.stanford.edu<mailto:spencer at ccrma.stanford.edu>> 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-about-time
On Tue, May 3, 2016 at 1:33 AM, Chiel ten Brinke <ctenbrinke at gmail.com<mailto:ctenbrinke at gmail.com>> 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 <ctenbrinke at gmail.com<mailto:ctenbrinke at gmail.com>> 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 <ctenbrinke at gmail.com<mailto:ctenbrinke at gmail.com>> 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 <gonzalo at dense13.com<mailto:gonzalo at dense13.com>> 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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Stanford University
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