[PD] [PD-dev] recursion in Gem - a tutorial

[Patrice Colet]

Forget last mail, your patch is perfect, Claudius, very good.

patrice colet a écrit :
> Yes, I've allready figured it out with testing your external on linux,
> the dll is merely impossible to make with win32-mingw (so if someone has
> succesfully made the dll, please share!) and with reading your last mail
> to IOannes.
> 
> 
> Le jeudi 19 juillet 2007 à 08:12 +0000, Claude Heiland-Allen a écrit :
>> Patrice Colet wrote:
>>>> IOhannes m zmoelnig a écrit :
>>>  (i haen't seen [nnrepeat] on the website, so i
>>>>> don't know what it does) with [repeat] or with the [s]/[r] idiom claude
>>>>> has proposed.
>>> Apparently it does something like the attached patch, and the 
>>> functionning is explained into the tutorial patch 06_break_symmetry.pd,
>>> I just need now to go on linux and compile to see how significantly 
>>> faster is the external compared with the patch.
>> Again, I tried to create something similar in Pd, but ran into 
>> re-entrancy bugs whenever I tried to use recursion.  I do not write 
>> externals lightly, but in this case I think it was necessary.  If 
>> someone knows how to solve this in pure Pd, I'd be delighted.
>>
>> Your abstraction doesn't do what you think it does in the presence of 
>> re-entrancy.  See attached test patch.
>>
>>
>> With max-depth = 2 and repetitions = 2.
>>
>> My [nnrepeat] external:
>> ->: 2 0
>> ->: 1 0
>> <-: 1 0
>> ->: 1 1
>> <-: 1 1
>> <-: 2 0
>> ->: 2 1
>> ->: 1 0
>> <-: 1 0
>> ->: 1 1
>> <-: 1 1
>> <-: 2 1
>>
>>
>> Your [nnrepeat] abstraction:
>> <-: 2 0
>> <-: 1 1
>> ->: 1 1
>> <-: 1 2
>> ->: 1 2
>> ->: 2 2
>> <-: 2 0
>> <-: 1 1
>> ->: 1 1
>> <-: 1 2
>> ->: 1 2
>> ->: 2 2
>>
>>
>> pièce jointe document plein texte (nnrepeat-test.pd)
>> #N canvas 0 0 481 517 10;
>> #X obj 71 95 r \$0-recurse;
>> #X obj 71 380 s \$0-recurse;
>> #X obj 140 270 t b a b;
>> #X obj 224 290 v \$0-depth;
>> #X obj 224 310 - 1;
>> #X obj 224 330 max 0;
>> #X obj 162 350 spigot;
>> #X obj 224 350 v \$0-depth;
>> #X obj 185 160 t b f;
>> #X obj 185 183 v \$0-depth;
>> #X obj 185 208 pack f f;
>> #X obj 140 290 v \$0-depth;
>> #X obj 140 330 v \$0-depth;
>> #X obj 140 310 + 1;
>> #X obj 108 50 t a b;
>> #X msg 108 21 nrepeat test;
>> #X obj 285 108 v \$0-depth;
>> #X floatatom 262 77 5 0 0 2 max-depth - -;
>> #X floatatom 261 38 5 0 0 2 repetitions - -;
>> #X obj 246 108 f 3;
>> #X obj 185 235 print ->;
>> #X obj 98 160 t b f;
>> #X obj 98 183 v \$0-depth;
>> #X obj 98 208 pack f f;
>> #X obj 98 235 print <-;
>> #X obj 108 135 nnrepeat 2;
>> #X connect 0 0 25 0;
>> #X connect 2 0 11 0;
>> #X connect 2 1 6 0;
>> #X connect 2 2 3 0;
>> #X connect 3 0 4 0;
>> #X connect 4 0 5 0;
>> #X connect 5 0 6 1;
>> #X connect 5 0 7 0;
>> #X connect 6 0 1 0;
>> #X connect 8 0 9 0;
>> #X connect 8 1 10 1;
>> #X connect 9 0 10 0;
>> #X connect 10 0 20 0;
>> #X connect 11 0 13 0;
>> #X connect 13 0 12 0;
>> #X connect 14 0 25 0;
>> #X connect 14 1 19 0;
>> #X connect 15 0 14 0;
>> #X connect 17 0 19 1;
>> #X connect 18 0 25 1;
>> #X connect 19 0 16 0;
>> #X connect 21 0 22 0;
>> #X connect 21 1 23 1;
>> #X connect 22 0 23 0;
>> #X connect 23 0 24 0;
>> #X connect 25 0 21 0;
>> #X connect 25 1 2 0;
>> #X connect 25 2 8 0;
> 
> 
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