[chuck-users] Conversion float to int using SndBuf (Michael Heuer) => (ermina) => (Jean Menezes da Rocha)

Tue Jan 21 12:20:09 EST 2020

Thank you Michael, Ermina and Jean!
It is working a treat.

Micheal

On Tue, 21 Jan 2020 at 17:00, <chuck-users-request at lists.cs.princeton.edu>
wrote:

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> Today's Topics:
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>    1. Conversion float to int using SndBuf (M?che?l ? Cath?in)
>    2. Re: Conversion float to int using SndBuf (Michael Heuer)
>    3. Re: Conversion float to int using SndBuf (ermina)
>    4. Re: Conversion float to int using SndBuf (Jean Menezes da Rocha)
>
>
>
> ---------- Forwarded message ----------
> From: "Mícheál Ó Catháin" <micheal.ocathain at gmail.com>
> To: chuck-users at lists.cs.princeton.edu
> Cc:
> Bcc:
> Date: Tue, 21 Jan 2020 13:08:02 +0000
> Subject: [chuck-users] Conversion float to int using SndBuf
> Hi
> What is the best way to convert a float to int in the following please?
>
> //I want to set myBuf.pos to a percentage of myBuf.samples()...
> //Start playing at say 40% through the total number of samples.
>
> 40.0 => float pctPosInit;
> pctPosInit/100*myBuf.samples() => myBuf.pos;
>
>
> This throws the error argument types don't match.
> I'm not seeing how to convert the float to an int here.
> Thanks for your help!
>
> Micheal
>
>
>
> ---------- Forwarded message ----------
> From: Michael Heuer <heuermh at gmail.com>
> To: ChucK Users Mailing List <chuck-users at lists.cs.princeton.edu>
> Cc:
> Bcc:
> Date: Tue, 21 Jan 2020 09:35:12 -0600
> Subject: Re: [chuck-users] Conversion float to int using SndBuf
> Hello Mícheál,
>
> The ChucK language has a cast operator '$' which might come in handy in
> this situation
>
> (pctPosInit/100*myBuf.samples()) $ int => myBuf.pos;
>
> Cheers,
>
>    michael
>
>
> > On Jan 21, 2020, at 7:08 AM, Mícheál Ó Catháin <
> micheal.ocathain at gmail.com> wrote:
> >
> > Hi
> > What is the best way to convert a float to int in the following please?
> >
> > //I want to set myBuf.pos to a percentage of myBuf.samples()...
> > //Start playing at say 40% through the total number of samples.
> >
> > 40.0 => float pctPosInit;
> > pctPosInit/100*myBuf.samples() => myBuf.pos;
> >
> >
> > This throws the error argument types don't match.
> > I'm not seeing how to convert the float to an int here.
> > Thanks for your help!
> >
> > Micheal
> > _______________________________________________
> > chuck-users mailing list
> > chuck-users at lists.cs.princeton.edu
> > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>
>
>
>
>
> ---------- Forwarded message ----------
> From: ermina <ermina at studioplume.com>
> To: chuck-users at lists.cs.princeton.edu
> Cc:
> Bcc:
> Date: Tue, 21 Jan 2020 16:47:40 +0100
> Subject: Re: [chuck-users] Conversion float to int using SndBuf
> Hi,
>
> to convert a float to an int,
> you need to explicitly cast the value with
> 4.8 $ int => int foo;  // foo == 4
> (as written here: https://chuck.cs.princeton.edu/doc/language/oper.html)
>
> So you would do something like
> pctPosInit $ int => int pctPosInitInt
> pctPosInitInt/100*myBuf.samples() => myBuf.pos;
>
> . e
> On 01/21/2020 02:08 PM, Mícheál Ó Catháin wrote:
> > Hi
> > What is the best way to convert a float to int in the following please?
> >
> > //I want to set myBuf.pos to a percentage of myBuf.samples()...
> > //Start playing at say 40% through the total number of samples.
> >
> > 40.0 => float pctPosInit;
> > pctPosInit/100*myBuf.samples() => myBuf.pos;
> >
> >
> > This throws the error argument types don't match.
> > I'm not seeing how to convert the float to an int here.
> > Thanks for your help!
> >
> > Micheal
> >
> >
> > _______________________________________________
> > chuck-users mailing list
> > chuck-users at lists.cs.princeton.edu
> > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
> >
>
>
>
>
> ---------- Forwarded message ----------
> From: Jean Menezes da Rocha <jean at menezesdarocha.info>
> To: ChucK Users Mailing List <chuck-users at lists.cs.princeton.edu>
> Cc:
> Bcc:
> Date: Tue, 21 Jan 2020 12:58:36 -0300
> Subject: Re: [chuck-users] Conversion float to int using SndBuf
> I would suggest that you call Math.round() before casting, as to prevent
> undesirable effects: notice that in the example sent by ermina, 4.8 rounds
> down to 4 when cast to int, which could cause miscalculations *depending
> on your use case*.
> The previous example would look something like this if we used
> Math.round():
>
> Math.round(pctPosInit) $ int => int pctPosInitInt;
> pctPosInitInt/100*myBuf.samples() => myBuf.pos;
>
> Best regards!
>
> On Tue, Jan 21, 2020 at 12:49 PM ermina <ermina at studioplume.com> wrote:
>
>> Hi,
>>
>> to convert a float to an int,
>> you need to explicitly cast the value with
>> 4.8 $ int => int foo;  // foo == 4
>> (as written here: https://chuck.cs.princeton.edu/doc/language/oper.html)
>>
>> So you would do something like
>> pctPosInit $ int => int pctPosInitInt
>> pctPosInitInt/100*myBuf.samples() => myBuf.pos;
>>
>> . e
>> On 01/21/2020 02:08 PM, Mícheál Ó Catháin wrote:
>> > Hi
>> > What is the best way to convert a float to int in the following please?
>> >
>> > //I want to set myBuf.pos to a percentage of myBuf.samples()...
>> > //Start playing at say 40% through the total number of samples.
>> >
>> > 40.0 => float pctPosInit;
>> > pctPosInit/100*myBuf.samples() => myBuf.pos;
>> >
>> >
>> > This throws the error argument types don't match.
>> > I'm not seeing how to convert the float to an int here.
>> > Thanks for your help!
>> >
>> > Micheal
>> >
>> >
>> > _______________________________________________
>> > chuck-users mailing list
>> > chuck-users at lists.cs.princeton.edu
>> > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>> >
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>
>
> --
> Jean Menezes da Rocha
> _______________________________________________
> chuck-users mailing list
> chuck-users at lists.cs.princeton.edu
> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>
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