[PD] Data structures with $0?

João Pais jmmmpais at googlemail.com
Sun Jun 20 22:11:48 CEST 2010

>> isn't a hard coded external always more efficient than an abstraction,
> What's the speed that you need ?
> What's the speed that you want ?

I never measured it. what's the speed of pd? I guess as less speed as  
necessary, so that it doesn't bother other processes. also, in order to  
make it a sucessful abstraction, I have to put in extra code just to make  
sure that the data-s are created properly. although it's stable, it's  
always a drag.

>> specially if tcl/tk and gop are involved? I thought so.
> After it's computed, you still has to render the result.
> Chances are that you'd still render it with Tcl/Tk and GOP.
> GOP itself does not introduce a noticeable slowdown in pd-vanilla nor
> pd-extended nor pd-devel.

that might depend. some days ago I had a patch with 3 lines feeding into  
number boxes, and that alone made the cpu go up at least 10% (maybe  
more?). In my laptop trio I used a gop data-s abstraction to display the  
panning of the players, but replaced it with a gem patch. only that small  
module used ~ 20% cpu. in the end it's a waste, if you're trying to do  
that + 100 voice samples at the same time.

the example from dmtod#* seemed to be a full external, that might save  
some computation time. he also had the dashed lines to the control points,  
it's a small plus. (I could also do them with data-s, but can't be  

>> I have my patch in the other computer, can't send it now. my patch shows
>> only a gop with the line (array) and 4 control points, which can be
>> moved around with the mouse.
> I know, you sent it and I've seen it. I decided to concentrate on the
> formula, so I did it with numberboxes instead. It's possible to use the  
> GF
> computation together with a DS rendering.

ah, I forgot. the latest version can be fed the precise coordinates for  
each point separately, just like yours - I just scaled everything from 0  
to 1, since the patch is supposed to be a 0-1 transfer function.

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