[PD] Problem with Textfile and line with float
matohawk
matohawk at gmail.com
Wed Jun 30 09:58:56 CEST 2010
Hi Jonathan,
Yes I know textfile "works" but I can't put any kind of object behind
this Texfile.
I'll try all list object and this the same problem.
Look this :
http://www.th-th.fr/DOCS/Patch/bug-texfile.pd
I need to read this line with float at the begining but I can't.
So I think we will take a script to do this because textfile can't do this.
Thanks for your help
Thomas
Jonathan Wilkes a écrit :
> The problem occurs because Pd has several built-in message types, and
> the float message is one of them.
> Pd expects any message that has the "float" selector to have one
> argument, and that argument should be a
> float-atom (e.g., "float 1"). So if you type "float foo" in a message
> box and click it, Pd complains about
> "bad arguments" because (I think) when the message box tries to parse
> the message, it sees the "float"
> selector and thus expects a number for the argument, but instead it gets
> the symbolic-atom "foo."
>
> In your example patch, if you disconnect all the objects from the outlet
> of [textfile] and click
> the [bng], you'll notice that you don't get an error. I would take this
> to mean that [textfile] does its
> job-- its just that once you try to do anything with the message "float
> toto 0 1 2" by connecting
> [textfile]'s outlet to another object, Pd will catch the badly formed
> message and report an error.
>
> (On the other hand, if your example text file had the line "float 3 0 1
> 2," the first argument ("3") would be
> the right type of atom, so Pd would just silently truncate
> everything after the first argument. But you'd still get an error from the
> right inlet of [select float] because, ironically, by making the first
> argument of [select] the word
> "float" instead of a float-atom like "3," you are instantiating a
> [select] object that expects symbol
> messages and not floats.)
>
> As far as a solution, you could begin each line of your text file with
> the selector "list", or a word that
> is not the selector of Pd's builtin messages. If you're reading in
> arbitrary data and you can't control
> whether each line starts with something that could be confused for a
> built-in Pd message type, I'm not sure
> what the best solution is.
>
> -Jonathan
>
> ------------------------------------------------------------------------
> *From:* Pedro Lopes <pedro.lopes at ist.utl.pt>
> *To:* matohawk <matohawk at gmail.com>
> *Cc:* pd-list <Pd-list at iem.at>
> *Sent:* Tue, June 29, 2010 6:49:44 PM
> *Subject:* Re: [PD] Problem with Textfile and line with float
>
> humm.. I see what you mean now. It gives a error with the float argument
> when it arrives at the objects after the textfile. I'm trying to figure
> out the reason for that.
>
> On Tue, Jun 29, 2010 at 11:42 PM, Pedro Lopes <pedro.lopes at ist.utl.pt
> <mailto:pedro.lopes at ist.utl.pt>> wrote:
>
> I did that, but what are you expecting your patch to do?
> Should it send each object read from text file separately?
>
> 'Cause here (with the patch I explain in my previous reply) the
> textfile reads your file and outputs all the values to a [print
> list] so then its just a matter of manipulating that into what you want.
>
> I used your file for the tests. I can try to look and guess what do
> you intend, but its probably less ambiguous if you explain the
> purpose. :)
>
> Best of luck,
> Pedro
>
>
> On Tue, Jun 29, 2010 at 11:36 PM, matohawk <matohawk at gmail.com
> <mailto:matohawk at gmail.com>> wrote:
>
> Hi Pedro,
> Sorry I think I'm not very with explanation.
> I know how textfile works it's not my problem
> Have a look of this patch and textfile, it's better to
> understand the problem:
> http://www.th-th.fr/DOCS/Patch/bug-texfile.pd
> http://www.th-th.fr/DOCS/Patch/text-float.txt
>
> Download the twho files, open the patch and click on bang
>
> Cheers,
> Thomas
>
> Pedro Lopes a écrit :
>
> I'm not following the "concept" behind your code.
>
> Notice that you can connect a message box "print" and send
> that command to textfile. And it reads your file to the pd
> shell correctly.
>
> [read your-file.txt]
> | [print( <-- this is a message
> | /
> |/
> | [bang] <-- hit this to read,.
> | /
> |/
> [textfile]
> |
> |
> [print list]
>
> And it works. Take a look at the help file, it shows hot to
> use it. I hope I'm understanding your issue, if not,
> hopefully someone does :)
>
> Best of luck,
> Pedro
> p.s: remember to use the "rewind" message to textfile,
> because otherwise it doesn't read the line again! Because it
> moves forward with the seek file pointer.
>
> On Tue, Jun 29, 2010 at 10:37 PM, thomas thiery
> <matohawk at gmail.com <mailto:matohawk at gmail.com>
> <mailto:matohawk at gmail.com <mailto:matohawk at gmail.com>>> wrote:
>
> Hi pd-list,
>
> test this patch, I saw a curious problem. I need to read
> line with
> "float" at the begining of a line and textfile can't do this.
> It's a pity
>
> -- Matohawk alias Th-Th
> www.th-th.fr <http://www.th-th.fr/> <http://www.th-th.fr>
>
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> --
> Pedro Lopes
> contacto: jazz at radiozero.pt <mailto:jazz at radiozero.pt>
> <mailto:jazz at radiozero.pt <mailto:jazz at radiozero.pt>>
>
> website: http://web.ist.utl.pt/Pedro.Lopes
>
>
>
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>
>
> --
> Pedro Lopes
> contacto: jazz at radiozero.pt <mailto:jazz at radiozero.pt>
> website: http://web.ist.utl.pt/Pedro.Lopes
>
>
>
>
> --
> Pedro Lopes
> contacto: jazz at radiozero.pt <mailto:jazz at radiozero.pt>
> website: http://web.ist.utl.pt/Pedro.Lopes
>
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