Re: Python instrument and global variables in orchestra

Steven Yi wrote:

Hi Olivier,

As I mentioned, I do not know if you can do what you ultimately want
to achieve musically or not since you have not responded to my request
for code or examples. My thought was that you might be able to use a
different mechanism than using global variables(I.e. store values in a
table to communicate a dynamic number of signals, use zak, possibly
use chnget/chnset) , but again I can not help you without more
information that I have asked for.

As for if I think it would be interesting or not, you could should
simply ask to request to implement the it. You should know though that
I asked you the above questions so I could determine if there are
other ways to do what you want without me having to change code in
blue, as it does take up my personal time to do these things and I
certainly enjoy whatever free time I can get.

Anyways, this could be implemented by making the global instrument
area of the python instrument editor have a check box that would allow
processing the text as code or not before generating to the global
instrument code. This would be the first solution to come to mind,
another possibility then would be to change the processing order in
the instrument so that one could store global orc code from the instr
code  in a globalOrc variable. That if found gets appended to the
value in the global instrument tab before generating to the CSD.

Anyways, I have to run as I have to to work now on very little sleep
for the second day in a row, complete with jet lag. Please review the
above and let me know what you think would be better for
implementation and we'll see if it can done quickly.

Steven

On 1/20/09, obaudouin <olivierbaudouin@perso.altitudetelecom.fr> wrote:
>
> Hi Steven!
>
> As you, I think there is no solution available for my problem into Csound or
> Blue. However, I can produce separately a csd file with Python and import it
> in Blue...
>
> Thank you very much for your help,
>
> Olivier.
>
> PS: Allowing code generation from a Python instrument into the global and
> score instrument tabs is an interesting feature which could be added to
> Blue, isn't it?
>
>
> Steven Yi wrote:
>>
>> Hi Olivier,
>>
>> So when you say FROM AN INSTRUMENT, are you saying the number of
>> global variables is dynamic depending on the python code? (Because
>> using "global instrument" tab within the instrument editor is a means
>> to create global instrument code that is encapsulated with the
>> instrument and is FROM AN INSTRUMENT, so I need this clarification to
>> understand exactly what you are saying).  If you are referring to
>> generating that from the python code,  I do not think this is
>> possible, but there may be other ways to accomplish what you are doing
>> than just using global variables.  Could you post some code or an
>> example project?  If I can see what you are trying to accomplish, I
>> can better try to figure out a solution.
>>
>> Regarding pre blocks, they are explained here:
>>
>> http://www.csounds.com/stevenyi/blue/usermanual/html/commandBlocks.html
>>
>> Thanks!
>> steven
>>
>>
>> On Mon, Jan 19, 2009 at 2:42 PM, obaudouin
>> <olivierbaudouin@perso.altitudetelecom.fr> wrote:
>>>
>>> I'm looking for a way to add lines (a lot of MIDI controllers
>>> automatically
>>> generated) in the global part of the orchestra FROM AN INSTRUMENT, to
>>> avoid
>>> a copy by hand:
>>>
>>> 1. gk_var init 0 into an instrument does'nt work (of course)
>>> 2. I have never heard of a Csound opcode able to do that (?)
>>> 3. and my question is...: a Python instrument could do that in Blue?
>>>
>>> What is this the ";[pre] {" block ? How do you deal with that ?
>>>
>>> ---------
>>>
>>>
>>>
>>>
>>> Steven Yi wrote:
>>>>
>>>> Hi Olivier,
>>>>
>>>> Have you tried using the "global instrument" tab in the python
>>>> instrument editor? That code should be copied to the global area when
>>>> generating a CSD.  So you should be able to use:
>>>>
>>>> gk_<INSTR_ID>_myvar init 0
>>>>
>>>> and in your code, use
>>>>
>>>> gk_<INSTR_ID>_myvar
>>>>
>>>> and doing so will make sure that the variable names are unique per
>>>> instrument, regardless of if you make multiple copies of that
>>>> instrument.  There should also be no issues with order of
>>>> initialization, as that code should be generated at the top of the CSD
>>>> before and instrument definitions.  (If you do need to ensure that
>>>> code is generated at very very top of global area, you can use a
>>>> ";[pre] {" block.)
>>>>
>>>> Let me know if that is what you are talking about, otherwise could you
>>>> post an example .blue file that illustrates the problem?
>>>>
>>>> Thanks!
>>>> steven
>>>> On Mon, Jan 19, 2009 at 11:17 AM, obaudouin
>>>> <olivierbaudouin@perso.altitudetelecom.fr> wrote:
>>>>>
>>>>> Hi!
>>>>>
>>>>> I need that a Python instrument initializes global variables in the
>>>>> global
>>>>> orchestra. Currently, I copy by hand the "gkxxx init 0..." lines
>>>>> produced
>>>>> with the python instrument into the global orchestra before removing
>>>>> them
>>>>> from the instrument, and it is not very elegant!
>>>>>
>>>>> Thanks a lot for Blue,
>>>>>
>>>>> Olivier.
>>>>> --
>>>>> View this message in context:
>>>>> http://www.nabble.com/Python-instrument-and-global-variables-in-orchestra-tp21546201p21546201.html
>>>>> Sent from the Csound - Blue - User mailing list archive at Nabble.com.
>>>>>
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