[chuck-users] print absolute time in chuck

[Spencer Salazar]

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>
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>
> 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>
>> 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> 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.
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> chuck-users mailing list
>>>>> chuck-users at lists.cs.princeton.edu
>>>>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>>>>
>>>>>
>>>> --
>>>> http://dense13.com
>>>> http://www.whole-play.com
>>>> https://www.30daygroove.com
>>>> _______________________________________________
>>>> chuck-users mailing list
>>>> chuck-users at lists.cs.princeton.edu
>>>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>>>
>>>
>>>
>>
>
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>


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

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