[PD] hot and cold inlets don't always make sense

Lao Yu noise.now at gmail.com
Fri Nov 21 17:01:38 CET 2008


I went through M-P's patches, trust me. He talks a lot about looping  
etc but not about trivial stuff that I mentioned.

I knew flossmanuals but the dat flow tut escaped my notice. there is  
a very suitable example that is practical to me. Thank you very much  
for pointing me there.

For the sake of replying one rather angry reaction (I guess he won't  
read) - when incrementing a coarse / fine value of for instance  
tuning it is totally irrelevant which parameter is changed first. the  
point is to output a new value whenever either is changed. So  
pointing out that the hot/cold logic is essential to pd's workings  
doesn't even remotely give me a clue.

But that's ok, nobody is perfect.

Thanks again for the patient posters, I appreciate a lot.


On Nov 21, 2008, at 7:50 PM, Derek Holzer wrote:

> Hi Jurgen,
> understanding hot and cold is essential to understanding the way Pd
> handles order of operations, so it's best to learn it right from the
> start. In your example, it is unclear/ambiguous whether the fine  
> number
> gets sent to the add before or after the bang gets sent to the coarse
> number. (This is determined by creation order, which cannot be seen on
> the screen). This can lead to errors later.
> The preferred way is to use [t b f], where the [f] outlet is connected
> to the cold side of the [+], and the [b] outlet is connected to the  
> hot
> side of the [+]. A bang to the hot side of many objects tells it to do
> the same operation again with the information contained in the inlets.
> In this case, the hot inlet will have the previous number stored in it
> as well. All this is explained in Miller's HTML manual, the "control"
> documentation patches, and also in the in-progress Pd FLOSS Manual:
> http://en.flossmanuals.net/puredata
> best!
> Derek
> Lao Yu wrote:
>> Hi,
>> when using an [+] object I find it most of the time counterproductive
>> that the right inlet is considered cold.
>> for example, if I want to use 2 different controls for 'coarse' and
>> 'fine' tuning parameters it is necessary to add them together.  
>> however
>> when changing 'fine' value which for instance is connected to the  
>> right
>> inlet the new value is only taken into consideration once the  
>> 'coarse'
>> value connected to the left inlet is changed as well.
>> the only workaround I found was to [bang] the hot inlet form the cold
>> one as illustrated in the attached patch. but I don't find that  
>> elegant.
>> is there a better way to make both inlets hot?
> -- 
> derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/ 
> macumbista
> ---Oblique Strategy # 7:
> "Accept advice"
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