/usr/lib/pd/extra/mapping/polar2cartesian.pd is in pd-mapping 0.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #N canvas 38 370 528 390 10;
#X obj 160 230 zexy/pol2cart;
#X obj 11 36 inlet radius;
#X obj 161 36 inlet angle;
#X text 12 18 input range: 0 to 1;
#X text 161 19 input range: 0 to 1;
#X obj 106 332 outlet x;
#X obj 203 334 outlet y;
#X obj 334 36 inlet z;
#X text 334 19 input range: 0 to 1;
#X obj 300 335 outlet z;
#X obj 128 147 float;
#X obj 205 147 float;
#X obj 315 146 float;
#X obj 128 76 trigger bang float bang;
#X obj 334 76 trigger bang bang float;
#X obj 204 183 mapping2radians;
#X obj 128 183 * 1.41421;
#X obj 204 271 / 2;
#X obj 204 291 + 0.5;
#X obj 106 269 / 2;
#X obj 106 289 + 0.5;
#X text 261 276 TODO: z needs to be properly scaled;
#X text 355 360 released under the GNU GPL;
#X text 8 360 (C) Copyright 2008 Hans-Christoph Steiner <hans@at.or.at>
;
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#X connect 1 0 10 0;
#X connect 2 0 13 0;
#X connect 7 0 14 0;
#X connect 10 0 16 0;
#X connect 11 0 15 0;
#X connect 12 0 0 2;
#X connect 13 0 10 0;
#X connect 13 1 11 0;
#X connect 13 2 12 0;
#X connect 14 0 10 0;
#X connect 14 1 11 0;
#X connect 14 2 12 1;
#X connect 15 0 0 1;
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#X connect 17 0 18 0;
#X connect 18 0 6 0;
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#X connect 20 0 5 0;
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