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#N canvas 0 0 602 516 10;
#X obj 14 66 gemwin;
#X obj 14 9 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0 1
;
#X msg 48 10 create;
#X msg 55 33 destroy;
#X obj 14 93 gemhead;
#X obj 14 123 t a a;
#X obj 59 123 circle;
#X obj 14 153 separator;
#X obj 14 213 scale 0.7;
#X obj 14 173 rotate 45 0 0 1;
#X obj 14 243 t a a;
#X obj 59 243 circle;
#X obj 14 273 separator;
#X obj 14 333 scale 0.7;
#X obj 14 293 rotate 45 0 0 1;
#X obj 14 363 t a a;
#X obj 59 363 circle;
#X obj 14 193 translate 2 0 1 0;
#X obj 14 313 translate 2 0 1 0;
#X obj 14 393 separator;
#X obj 14 453 scale 0.7;
#X obj 14 413 rotate 45 0 0 1;
#X obj 14 433 translate 2 0 1 0;
#X obj 14 483 t a a;
#X obj 59 483 circle;
#X text 170 17 A tutorial on recursion in Gem;
#X text 170 37 (GPL) 2007 Claude Heiland-Allen <claude@mathr.co.uk>
;
#X text 170 77 The simplest and most obvious way of working with Gem
is to create all the objects statically. That is \, the Gem chain (or
tree) is exactly what is visible in the patch.;
#X text 170 127 Say we way we want to make a spiral of circles. Even
with just 4 circles the repetition is painfully obvious \, and if we
wanted more the duplication would be painfully tedious.;
#X text 170 177 There is a powerful way to avoid this pain \, however
\, using recursion.;
#X connect 1 0 0 0;
#X connect 2 0 0 0;
#X connect 3 0 0 0;
#X connect 4 0 5 0;
#X connect 5 0 7 0;
#X connect 5 1 6 0;
#X connect 7 0 9 0;
#X connect 8 0 10 0;
#X connect 9 0 17 0;
#X connect 10 0 12 0;
#X connect 10 1 11 0;
#X connect 12 0 14 0;
#X connect 13 0 15 0;
#X connect 14 0 18 0;
#X connect 15 0 19 0;
#X connect 15 1 16 0;
#X connect 17 0 8 0;
#X connect 18 0 13 0;
#X connect 19 0 21 0;
#X connect 20 0 23 0;
#X connect 21 0 22 0;
#X connect 22 0 20 0;
#X connect 23 1 24 0;