[PD] Create and deleting gem objects dynamically

[Frank Barknecht]

Hallo,
Fanouris Moraitis hat gesagt: // Fanouris Moraitis wrote:

> I was wondering if there is a way to delete and create gem objects
> dynamically.  To be more clear I would say if there is any way to
> render a certain number of shapes (eg squares) in the gem window,
> the number of the shapes will be dynamically changed through a
> variable, and also if there is a way to delete them (and also know
> which one to delete like "delete the third square")

There is a surprisingly unknown, but immensly useful trick to render
many copies of a Geo, which is best explained by seeing it in action,
so I made attached patch.

Ciao
-- 
 Frank Barknecht                 _ ______footils.org_ __goto10.org__
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#N canvas 0 0 700 720 10;
#X obj 483 103 gemwin;
#X msg 484 59 create \, 1;
#X msg 483 81 0 \, destroy;
#X obj 87 526 square 0.1;
#X obj 87 69 gemhead;
#X obj 87 494 translateXYZ;
#X obj 87 233 t b a;
#X obj 87 101 bang;
#X obj 164 312 loadbang;
#X text 133 102 generate one bang every Gem-frame;
#X text 241 320 switch rendering off at first \, otherwise you will
get an additional square.;
#X msg 164 337 0;
#X obj 87 140 f 1;
#X msg 87 185 -2 \, -1 \, \$1 \, 2;
#X obj 139 132 hsl 128 15 -2 2 0 0 empty empty empty -2 -8 0 10 -262144
-1 -1 8400 1;
#X floatatom 136 151 5 0 0 0 - - -;
#X text 197 226 For every message \, first change the translation \,
then bang the lower gemhead to make it render one square with the currently
active translation.;
#X obj 87 376 gemhead 45;
#X obj 87 442 separator;
#X text 193 442 separate the squares from each other.;
#X text 198 181 use the bang to fire off many messages \, in this case
there are four messages: "-2" \, "-1" \, "1" (or rather: \$1) and "2"
;
#X text 194 373 Important: priority number (45) should be less than
incoming gemhead (which defaults to 50).;
#X text 46 23 Rendering many copies of a single Geo.;
#X obj 29 617 translateXYZ;
#X obj 29 669 circle 0.1;
#X obj 29 640 colorRGB 1 0 0;
#N canvas 328 446 756 359 gem-duplicator 0;
#X obj 119 41 t b a;
#X obj 196 120 loadbang;
#X msg 196 145 0;
#X obj 119 184 gemhead 45;
#X obj 119 250 separator;
#X obj 149 67 outlet;
#X obj 119 271 outlet;
#X obj 119 20 inlet;
#X text 234 36 Pass on every message to the outlet \, then bang the
lower gemhead to make it render once.;
#X text 234 182 Important: priority number (45) should be less than
incoming gemhead (which defaults to 50).;
#X text 230 252 separate the gemlists from each other.;
#X text 269 122 switch rendering off at first \, otherwise you will
get an additional render-command.;
#X connect 0 0 3 0;
#X connect 0 1 5 0;
#X connect 1 0 2 0;
#X connect 2 0 3 0;
#X connect 3 0 4 0;
#X connect 4 0 6 0;
#X connect 7 0 0 0;
#X restore 29 572 pd gem-duplicator;
#X text 162 570 Use this for copy-and-paste or put it into an abstraction.
;
#X connect 1 0 0 0;
#X connect 2 0 0 0;
#X connect 4 0 7 0;
#X connect 5 0 3 0;
#X connect 6 0 17 0;
#X connect 6 1 5 1;
#X connect 7 0 12 0;
#X connect 8 0 11 0;
#X connect 11 0 17 0;
#X connect 12 0 13 0;
#X connect 13 0 6 0;
#X connect 13 0 26 0;
#X connect 14 0 15 0;
#X connect 15 0 12 1;
#X connect 17 0 18 0;
#X connect 18 0 5 0;
#X connect 23 0 25 0;
#X connect 25 0 24 0;
#X connect 26 0 23 0;
#X connect 26 1 23 2;