aboutsummaryrefslogtreecommitdiffhomepage
path: root/patches/server/0903-Add-Alternate-Current-redstone-implementation.patch
blob: 63e67cc7ed4a5344f0575e43e60b674b6a8c098d (plain)
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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Space Walker <spacedoesrs@gmail.com>
Date: Tue, 5 Apr 2022 01:01:13 +0200
Subject: [PATCH] Add Alternate Current redstone implementation

Author: Space Walker <spacedoesrs@gmail.com>

Original license: MIT
Original project: https://github.com/SpaceWalkerRS/alternate-current

This patch adds Alternate Current's redstone implementation as an alternative to vanilla and Eigencraft's.
Performance of (de)powering redstone dust is many times faster than vanilla, and even exceeds Eigencraft.
Similar to Eigencraft, Alternate Current heavily changes the update order of redstone dust. This means any contraption that
is location dependent in vanilla will either work everywhere or nowhere when using Alternate Current/Eigencraft. Beyond that
parity issues should be rare for both implementations, though Alternate Current has not been tested as thoroughly, so I
cannot comment on how the two compare in that aspect.

Alternate Current is more invasive than Eigencraft, though some of the modifications can be removed with only a minor
performance penalty in a small number of cases. Alternate Current needs the following modifications:
* Level/ServerLevel: Each level has its own 'wire handler' that handles redstone dust power changes.
* RedStoneWireBlock: Replace calls to vanilla's or Eigencraft's methods for handling power changes with calls to
Alternate Current's wire handler.
* (optional) Every power emitter's block class: new methods added to these classes make it easier for Alternate Current
to check if any block is a potential power source.

The use-faster-eigencraft-redstone config has been replaced with the redstone-implementation config, which can be used to
switch between the vanilla, Eigencraft, and Alternate Current implementations.

diff --git a/src/main/java/alternate/current/wire/LevelHelper.java b/src/main/java/alternate/current/wire/LevelHelper.java
new file mode 100644
index 0000000000000000000000000000000000000000..186e0a86ceaed007d394378157ce1596a0601908
--- /dev/null
+++ b/src/main/java/alternate/current/wire/LevelHelper.java
@@ -0,0 +1,64 @@
+package alternate.current.wire;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.LevelChunkSection;
+
+import org.bukkit.event.block.BlockRedstoneEvent;
+
+public class LevelHelper {
+
+    static int doRedstoneEvent(ServerLevel level, BlockPos pos, int prevPower, int newPower) {
+        BlockRedstoneEvent event = new BlockRedstoneEvent(level.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ()), prevPower, newPower);
+        level.getCraftServer().getPluginManager().callEvent(event);
+
+        return event.getNewCurrent();
+    }
+
+    /**
+     * An optimized version of Level.setBlock. Since this method is only used to
+     * update redstone wire block states, lighting checks, height map updates, and
+     * block entity updates are omitted.
+     */
+    static boolean setWireState(ServerLevel level, BlockPos pos, BlockState state, boolean updateNeighborShapes) {
+        int y = pos.getY();
+
+        if (y < level.getMinBuildHeight() || y >= level.getMaxBuildHeight()) {
+            return false;
+        }
+
+        int x = pos.getX();
+        int z = pos.getZ();
+        int index = level.getSectionIndex(y);
+
+        ChunkAccess chunk = level.getChunk(x >> 4, z >> 4, ChunkStatus.FULL, true);
+        LevelChunkSection section = chunk.getSections()[index];
+
+        if (section == null) {
+            return false; // we should never get here
+        }
+
+        BlockState prevState = section.setBlockState(x & 15, y & 15, z & 15, state);
+
+        if (state == prevState) {
+            return false;
+        }
+
+        // notify clients of the BlockState change
+        level.getChunkSource().blockChanged(pos);
+        // mark the chunk for saving
+        chunk.setUnsaved(true);
+
+        if (updateNeighborShapes) {
+            prevState.updateIndirectNeighbourShapes(level, pos, Block.UPDATE_CLIENTS);
+            state.updateNeighbourShapes(level, pos, Block.UPDATE_CLIENTS);
+            state.updateIndirectNeighbourShapes(level, pos, Block.UPDATE_CLIENTS);
+        }
+
+        return true;
+    }
+}
diff --git a/src/main/java/alternate/current/wire/Node.java b/src/main/java/alternate/current/wire/Node.java
new file mode 100644
index 0000000000000000000000000000000000000000..acfe97d62ef863a14e2e43db30917bd57bbd5171
--- /dev/null
+++ b/src/main/java/alternate/current/wire/Node.java
@@ -0,0 +1,97 @@
+package alternate.current.wire;
+
+import java.util.Arrays;
+
+import alternate.current.wire.WireHandler.Directions;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
+
+/**
+ * A Node represents a block in the world. It also holds a few other pieces of
+ * information that speed up the calculations in the WireHandler class.
+ * 
+ * @author Space Walker
+ */
+public class Node {
+
+    // flags that encode the Node type
+    private static final int CONDUCTOR = 0b01;
+    private static final int SOURCE    = 0b10;
+
+    final ServerLevel level;
+    final Node[] neighbors;
+
+    BlockPos pos;
+    BlockState state;
+    boolean invalid;
+
+    private int flags;
+
+    Node(ServerLevel level) {
+        this.level = level;
+        this.neighbors = new Node[Directions.ALL.length];
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof Node)) {
+            return false;
+        }
+
+        Node node = (Node)obj;
+
+        return level == node.level && pos.equals(node.pos);
+    }
+
+    @Override
+    public int hashCode() {
+        return pos.hashCode();
+    }
+
+    Node update(BlockPos pos, BlockState state, boolean clearNeighbors) {
+        if (state.is(Blocks.REDSTONE_WIRE)) {
+            throw new IllegalStateException("Cannot update a regular Node to a WireNode!");
+        }
+
+        if (clearNeighbors) {
+            Arrays.fill(neighbors, null);
+        }
+
+        this.pos = pos.immutable();
+        this.state = state;
+        this.invalid = false;
+
+        this.flags = 0;
+
+        if (this.state.isRedstoneConductor(this.level, this.pos)) {
+            this.flags |= CONDUCTOR;
+        }
+        if (this.state.isSignalSource()) {
+            this.flags |= SOURCE;
+        }
+
+        return this;
+    }
+
+    public boolean isWire() {
+        return false;
+    }
+
+    public boolean isConductor() {
+        return (flags & CONDUCTOR) != 0;
+    }
+
+    public boolean isSignalSource() {
+        return (flags & SOURCE) != 0;
+    }
+
+    public WireNode asWire() {
+        throw new UnsupportedOperationException("Not a WireNode!");
+    }
+}
diff --git a/src/main/java/alternate/current/wire/PowerQueue.java b/src/main/java/alternate/current/wire/PowerQueue.java
new file mode 100644
index 0000000000000000000000000000000000000000..9c293bef09ad1c95ba24ea6c41a27c5489b548dd
--- /dev/null
+++ b/src/main/java/alternate/current/wire/PowerQueue.java
@@ -0,0 +1,209 @@
+package alternate.current.wire;
+
+import java.util.AbstractQueue;
+import java.util.Arrays;
+import java.util.Iterator;
+
+import net.minecraft.world.level.redstone.Redstone;
+
+public class PowerQueue extends AbstractQueue<WireNode> {
+
+    private static final int OFFSET = -Redstone.SIGNAL_MIN;
+
+    /** The last wire for each power level. */
+    private final WireNode[] tails;
+
+    private WireNode head;
+    private WireNode tail;
+
+    private int size;
+
+    public PowerQueue() {
+        this.tails = new WireNode[(Redstone.SIGNAL_MAX + 1) - Redstone.SIGNAL_MIN];
+    }
+
+    @Override
+    public boolean offer(WireNode wire) {
+        if (wire == null) {
+            throw new NullPointerException();
+        }
+
+        int power = wire.nextPower();
+
+        if (contains(wire)) {
+            if (wire.power == power) {
+                // already queued for this power; exit
+                return false;
+            } else {
+                // already queued for different power; move it
+                move(wire, power);
+            }
+        } else {
+            insert(wire, power);
+        }
+
+        return true;
+    }
+
+    @Override
+    public WireNode poll() {
+        if (head == null) {
+            return null;
+        }
+
+        WireNode wire = head;
+        WireNode next = wire.next;
+
+        if (next == null) {
+            clear(); // reset the tails array
+        } else {
+            if (wire.power != next.power) {
+                // if the head is also a tail, its entry in the array
+                // can be cleared; there is no previous wire with the
+                // same power to take its place.
+                tails[wire.power + OFFSET] = null;
+            }
+
+            wire.next = null;
+            next.prev = null;
+            head = next;
+
+            size--;
+        }
+
+        return wire;
+    }
+
+    @Override
+    public WireNode peek() {
+        return head;
+    }
+
+    @Override
+    public void clear() {
+        for (WireNode wire = head; wire != null; ) {
+            WireNode w = wire;
+            wire = wire.next;
+
+            w.prev = null;
+            w.next = null;
+        }
+
+        head = null;
+        tail = null;
+
+        Arrays.fill(tails, null);
+
+        size = 0;
+    }
+
+    @Override
+    public Iterator<WireNode> iterator() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int size() {
+        return size;
+    }
+
+    public boolean contains(WireNode wire) {
+        return wire == head || wire.prev != null;
+    }
+
+    private void move(WireNode wire, int power) {
+        remove(wire);
+        insert(wire, power);
+    }
+
+    private void remove(WireNode wire) {
+        if (wire == tail || wire.power != wire.next.power) {
+            // assign a new tail for this wire's power
+            if (wire == head || wire.power != wire.prev.power) {
+                // there is no other wire with the same power; clear
+                tails[wire.power + OFFSET] = null;
+            } else {
+                // the previous wire in the queue becomes the tail
+                tails[wire.power + OFFSET] = wire.prev;
+            }
+        }
+
+        if (wire == head) {
+            head = wire.next;
+        } else {
+            wire.prev.next = wire.next;
+        }
+        if (wire == tail) {
+            tail = wire.prev;
+        } else {
+            wire.next.prev = wire.prev;
+        }
+
+        wire.prev = null;
+        wire.next = null;
+
+        size--;
+    }
+
+    private void insert(WireNode wire, int power) {
+        // store the power for which this wire is queued
+        wire.power = power;
+
+        // wires are sorted by power (highest to lowest)
+        // wires with the same power are ordered FIFO
+        if (head == null) {
+            // first element in this queue \o/
+            head = tail = wire;
+        } else if (wire.power > head.power) {
+            linkHead(wire);
+        } else if (wire.power <= tail.power) {
+            linkTail(wire);
+        } else {
+            // since the wire is neither the head nor the tail
+            // findPrev is guaranteed to find a non-null element
+            linkAfter(findPrev(wire), wire);
+        }
+
+        tails[power + OFFSET] = wire;
+
+        size++;
+    }
+
+    private void linkHead(WireNode wire) {
+        wire.next = head;
+        head.prev = wire;
+        head = wire;
+    }
+
+    private void linkTail(WireNode wire) {
+        tail.next = wire;
+        wire.prev = tail;
+        tail = wire;
+    }
+
+    private void linkAfter(WireNode prev, WireNode wire) {
+        linkBetween(prev, wire, prev.next);
+    }
+
+    private void linkBetween(WireNode prev, WireNode wire, WireNode next) {
+        prev.next = wire;
+        wire.prev = prev;
+
+        wire.next = next;
+        next.prev = wire;
+    }
+
+    private WireNode findPrev(WireNode wire) {
+        WireNode prev = null;
+
+        for (int i = wire.power + OFFSET; i < tails.length; i++) {
+            prev = tails[i];
+
+            if (prev != null) {
+                break;
+            }
+        }
+
+        return prev;
+    }
+}
diff --git a/src/main/java/alternate/current/wire/WireConnection.java b/src/main/java/alternate/current/wire/WireConnection.java
new file mode 100644
index 0000000000000000000000000000000000000000..4fd8cb29024330397cfe4cbc1f237d285bfb7b3e
--- /dev/null
+++ b/src/main/java/alternate/current/wire/WireConnection.java
@@ -0,0 +1,30 @@
+package alternate.current.wire;
+
+/**
+ * This class represents a connection between some WireNode (the 'owner') and a
+ * neighboring WireNode. Two wires are considered to be connected if power can
+ * flow from one wire to the other (and/or vice versa).
+ * 
+ * @author Space Walker
+ */
+public class WireConnection {
+
+    /** The connected wire. */
+    final WireNode wire;
+    /** Cardinal direction to the connected wire. */
+    final int iDir;
+    /** True if the owner of the connection can provide power to the connected wire. */
+    final boolean offer;
+    /** True if the connected wire can provide power to the owner of the connection. */
+    final boolean accept;
+
+    /** The next connection in the sequence. */
+    WireConnection next;
+
+    WireConnection(WireNode wire, int iDir, boolean offer, boolean accept) {
+        this.wire = wire;
+        this.iDir = iDir;
+        this.offer = offer;
+        this.accept = accept;
+    }
+}
diff --git a/src/main/java/alternate/current/wire/WireConnectionManager.java b/src/main/java/alternate/current/wire/WireConnectionManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..1dae7c0b896300ac9f0dd360dca23ca1de24dc66
--- /dev/null
+++ b/src/main/java/alternate/current/wire/WireConnectionManager.java
@@ -0,0 +1,139 @@
+package alternate.current.wire;
+
+import java.util.Arrays;
+import java.util.function.Consumer;
+
+import alternate.current.wire.WireHandler.Directions;
+import alternate.current.wire.WireHandler.NodeProvider;
+
+public class WireConnectionManager {
+
+    /** The owner of these connections. */
+    final WireNode owner;
+
+    /** The first connection for each cardinal direction. */
+    private final WireConnection[] heads;
+
+    private WireConnection head;
+    private WireConnection tail;
+
+    /** The total number of connections. */
+    int total;
+
+    /**
+     * A 4 bit number that encodes in which direction(s) the owner has connections
+     * to other wires.
+     */
+    private int flowTotal;
+    /** The direction of flow based connections to other wires. */
+    int iFlowDir;
+
+    WireConnectionManager(WireNode owner) {
+        this.owner = owner;
+
+        this.heads = new WireConnection[Directions.HORIZONTAL.length];
+
+        this.total = 0;
+
+        this.flowTotal = 0;
+        this.iFlowDir = -1;
+    }
+
+    void set(NodeProvider nodes) {
+        if (total > 0) {
+            clear();
+        }
+
+        boolean belowIsConductor = nodes.getNeighbor(owner, Directions.DOWN).isConductor();
+        boolean aboveIsConductor = nodes.getNeighbor(owner, Directions.UP).isConductor();
+
+        for (int iDir = 0; iDir < Directions.HORIZONTAL.length; iDir++) {
+            Node neighbor = nodes.getNeighbor(owner, iDir);
+
+            if (neighbor.isWire()) {
+                add(neighbor.asWire(), iDir, true, true);
+
+                continue;
+            }
+
+            boolean sideIsConductor = neighbor.isConductor();
+
+            if (!sideIsConductor) {
+                Node node = nodes.getNeighbor(neighbor, Directions.DOWN);
+
+                if (node.isWire()) {
+                    add(node.asWire(), iDir, belowIsConductor, true);
+                }
+            }
+            if (!aboveIsConductor) {
+                Node node = nodes.getNeighbor(neighbor, Directions.UP);
+
+                if (node.isWire()) {
+                    add(node.asWire(), iDir, true, sideIsConductor);
+                }
+            }
+        }
+
+        if (total > 0) {
+            iFlowDir = WireHandler.FLOW_IN_TO_FLOW_OUT[flowTotal];
+        }
+    }
+
+    private void clear() {
+        Arrays.fill(heads, null);
+
+        head = null;
+        tail = null;
+
+        total = 0;
+
+        flowTotal = 0;
+        iFlowDir = -1;
+    }
+
+    private void add(WireNode wire, int iDir, boolean offer, boolean accept) {
+        add(new WireConnection(wire, iDir, offer, accept));
+    }
+
+    private void add(WireConnection connection) {
+        if (head == null) {
+            head = connection;
+            tail = connection;
+        } else {
+            tail.next = connection;
+            tail = connection;
+        }
+
+        if (heads[connection.iDir] == null) {
+            heads[connection.iDir] = connection;
+
+            flowTotal |= (1 << connection.iDir);
+        }
+
+        total++;
+    }
+
+    /** 
+     * Iterate over all connections, without any specific
+     * update order in mind. Use this method if the iteration
+     * order is not important.
+     */
+    void forEach(Consumer<WireConnection> consumer) {
+        for (WireConnection c = head; c != null; c = c.next) {
+            consumer.accept(c);
+        }
+    }
+
+    /**
+     * Iterate over all connections in an order determined by
+     * the given flow direction. Use this method if the iteration
+     * order is important.
+     */
+    void forEach(Consumer<WireConnection> consumer, int iFlowDir) {
+        for (int iDir : WireHandler.CARDINAL_UPDATE_ORDERS[iFlowDir]) {
+            for (WireConnection c = heads[iDir]; c != null && c.iDir == iDir; c = c.next) {
+                consumer.accept(c);
+            }
+        }
+    }
+}
diff --git a/src/main/java/alternate/current/wire/WireHandler.java b/src/main/java/alternate/current/wire/WireHandler.java
new file mode 100644
index 0000000000000000000000000000000000000000..ef84b462aa4a0cedbf7c3cfb54ba43f31b8f4e2f
--- /dev/null
+++ b/src/main/java/alternate/current/wire/WireHandler.java
@@ -0,0 +1,1106 @@
+package alternate.current.wire;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Queue;
+
+import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
+import it.unimi.dsi.fastutil.longs.Long2ObjectMap.Entry;
+import it.unimi.dsi.fastutil.longs.Long2ObjectMaps;
+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.redstone.Redstone;
+
+/**
+ * This class handles power changes for redstone wire. The algorithm was
+ * designed with the following goals in mind:
+ * <br>
+ * 1. Minimize the number of times a wire checks its surroundings to determine
+ * its power level.
+ * <br>
+ * 2. Minimize the number of block and shape updates emitted.
+ * <br>
+ * 3. Emit block and shape updates in a deterministic, non-locational order,
+ * fixing bug MC-11193.
+ * 
+ * <p>
+ * In Vanilla redstone wire is laggy because it fails on points 1 and 2.
+ * 
+ * <p>
+ * Redstone wire updates recursively and each wire calculates its power level in
+ * isolation rather than in the context of the network it is a part of. This
+ * means a wire in a grid can change its power level over half a dozen times
+ * before settling on its final value. This problem used to be worse in 1.13 and
+ * below, where a wire would only decrease its power level by 1 at a time.
+ * 
+ * <p>
+ * In addition to this, a wire emits 42 block updates and up to 22 shape updates
+ * each time it changes its power level.
+ * 
+ * <p>
+ * Of those 42 block updates, 6 are to itself, which are thus not only
+ * redundant, but a big source of lag, since those cause the wire to
+ * unnecessarily re-calculate its power level. A block only has 24 neighbors
+ * within a Manhattan distance of 2, meaning 12 of the remaining 36 block
+ * updates are duplicates and thus also redundant.
+ * 
+ * <p>
+ * Of the 22 shape updates, only 6 are strictly necessary. The other 16 are sent
+ * to blocks diagonally above and below. These are necessary if a wire changes
+ * its connections, but not when it changes its power level.
+ * 
+ * <p>
+ * Redstone wire in Vanilla also fails on point 3, though this is more of a
+ * quality-of-life issue than a lag issue. The recursive nature in which it
+ * updates, combined with the location-dependent order in which each wire
+ * updates its neighbors, makes the order in which neighbors of a wire network
+ * are updated incredibly inconsistent and seemingly random.
+ * 
+ * <p>
+ * Alternate Current fixes each of these problems as follows.
+ * 
+ * <p>
+ * 1. To make sure a wire calculates its power level as little as possible, we
+ * remove the recursive nature in which redstone wire updates in Vanilla.
+ * Instead, we build a network of connected wires, find those wires that receive
+ * redstone power from "outside" the network, and spread the power from there.
+ * This has a few advantages:
+ * <br>
+ * - Each wire checks for power from non-wire components just once, and from
+ * nearby wires just twice.
+ * <br>
+ * - Each wire only sets its power level in the world once. This is important,
+ * because calls to Level.setBlock are even more expensive than calls to
+ * Level.getBlockState.
+ * 
+ * <p>
+ * 2. There are 2 obvious ways in which we can reduce the number of block and
+ * shape updates.
+ * <br>
+ * - Get rid of the 18 redundant block updates and 16 redundant shape updates,
+ * so each wire only emits 24 block updates and 6 shape updates whenever it
+ * changes its power level.
+ * <br>
+ * - Only emit block updates and shape updates once a wire reaches its final
+ * power level, rather than at each intermediary stage.
+ * <br>
+ * For an individual wire, these two optimizations are the best you can do, but
+ * for an entire grid, you can do better!
+ * 
+ * <p>
+ * Since we calculate the power of the entire network, sending block and shape
+ * updates to the wires in it is redundant. Removing those updates can reduce
+ * the number of block and shape updates by up to 20%.
+ * 
+ * <p>
+ * 3. To make the order of block updates to neighbors of a network
+ * deterministic, the first thing we must do is to replace the location-
+ * dependent order in which a wire updates its neighbors. Instead, we base it on
+ * the direction of power flow. This part of the algorithm was heavily inspired
+ * by theosib's 'RedstoneWireTurbo', which you can read more about in theosib's
+ * comment on Mojira <a href="https://bugs.mojang.com/browse/MC-81098?focusedCommentId=420777&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-420777">here</a>
+ * or by checking out its implementation in carpet mod <a href="https://github.com/gnembon/fabric-carpet/blob/master/src/main/java/carpet/helpers/RedstoneWireTurbo.java">here</a>.
+ * 
+ * <p>
+ * The idea is to determine the direction of power flow through a wire based on
+ * the power it receives from neighboring wires. For example, if the only power
+ * a wire receives is from a neighboring wire to its west, it can be said that
+ * the direction of power flow through the wire is east.
+ * 
+ * <p>
+ * We make the order of block updates to neighbors of a wire depend on what is
+ * determined to be the direction of power flow. This not only removes
+ * locationality entirely, it even removes directionality in a large number of
+ * cases. Unlike in 'RedstoneWireTurbo', however, I have decided to keep a
+ * directional element in ambiguous cases, rather than to introduce randomness,
+ * though this is trivial to change.
+ * 
+ * <p>
+ * While this change fixes the block update order of individual wires, we must
+ * still address the overall block update order of a network. This turns out to
+ * be a simple fix, because of a change we made earlier: we search through the
+ * network for wires that receive power from outside it, and spread the power
+ * from there. If we make each wire transmit its power to neighboring wires in
+ * an order dependent on the direction of power flow, we end up with a
+ * non-locational and largely non-directional wire update order.
+ * 
+ * @author Space Walker
+ */
+public class WireHandler {
+
+    public static class Directions {
+
+        public static final Direction[] ALL        = { Direction.WEST, Direction.NORTH, Direction.EAST, Direction.SOUTH, Direction.DOWN, Direction.UP };
+        public static final Direction[] HORIZONTAL = { Direction.WEST, Direction.NORTH, Direction.EAST, Direction.SOUTH };
+
+        // Indices for the arrays above.
+        // The cardinal directions are ordered clockwise. This allows
+        // for conversion between relative and absolute directions
+        // ('left' 'right' vs 'east' 'west') with simple arithmetic:
+        // If some Direction index 'iDir' is considered 'forward', then
+        // '(iDir + 1) & 0b11' is 'right', '(iDir + 2) & 0b11' is 'backward', etc.
+        public static final int WEST  = 0b000; // 0
+        public static final int NORTH = 0b001; // 1
+        public static final int EAST  = 0b010; // 2
+        public static final int SOUTH = 0b011; // 3
+        public static final int DOWN  = 0b100; // 4
+        public static final int UP    = 0b101; // 5
+
+        public static int iOpposite(int iDir) {
+            return iDir ^ (0b10 >>> (iDir >>> 2));
+        }
+
+        /**
+         * Each array is placed at the index that encodes the direction that is missing
+         * from the array.
+         */
+        private static final int[][] I_EXCEPT = {
+            {       NORTH, EAST, SOUTH, DOWN, UP },
+            { WEST,        EAST, SOUTH, DOWN, UP },
+            { WEST, NORTH,       SOUTH, DOWN, UP },
+            { WEST, NORTH, EAST,        DOWN, UP },
+            { WEST, NORTH, EAST, SOUTH,       UP },
+            { WEST, NORTH, EAST, SOUTH, DOWN     }
+        };
+    }
+
+    /**
+     * This conversion table takes in information about incoming flow, and outputs
+     * the determined outgoing flow.
+     * 
+     * <p>
+     * The input is a 4 bit number that encodes the incoming flow. Each bit
+     * represents a cardinal direction, and when it is 'on', there is flow in that
+     * direction.
+     * 
+     * <p>
+     * The output is a single Direction index, or -1 for ambiguous cases.
+     * 
+     * <p>
+     * The outgoing flow is determined as follows:
+     * 
+     * <p>
+     * If there is just 1 direction of incoming flow, that direction will be the
+     * direction of outgoing flow.
+     * 
+     * <p>
+     * If there are 2 directions of incoming flow, and these directions are not each
+     * other's opposites, the direction that is 'more clockwise' will be the
+     * direction of outgoing flow. More precisely, the direction that is 1 clockwise
+     * turn from the other is picked.
+     * 
+     * <p>
+     * If there are 3 directions of incoming flow, the two opposing directions
+     * cancel each other out, and the remaining direction will be the direction of
+     * outgoing flow.
+     * 
+     * <p>
+     * In all other cases, the flow is completely ambiguous.
+     */
+    static final int[] FLOW_IN_TO_FLOW_OUT = {
+        -1,               // 0b0000: -                     -> x
+        Directions.WEST,  // 0b0001: west                  -> west
+        Directions.NORTH, // 0b0010: north                 -> north
+        Directions.NORTH, // 0b0011: west/north            -> north
+        Directions.EAST,  // 0b0100: east                  -> east
+        -1,               // 0b0101: west/east             -> x
+        Directions.EAST,  // 0b0110: north/east            -> east
+        Directions.NORTH, // 0b0111: west/north/east       -> north
+        Directions.SOUTH, // 0b1000: south                 -> south
+        Directions.WEST,  // 0b1001: west/south            -> west
+        -1,               // 0b1010: north/south           -> x
+        Directions.WEST,  // 0b1011: west/north/south      -> west
+        Directions.SOUTH, // 0b1100: east/south            -> south
+        Directions.SOUTH, // 0b1101: west/east/south       -> south
+        Directions.EAST,  // 0b1110: north/east/south      -> east
+        -1,               // 0b1111: west/north/east/south -> x
+    };
+    /**
+     * Update order of cardinal directions. Given that the index encodes the
+     * direction that is to be considered 'forward', the resulting update order is {
+     * front, back, right, left }.
+     */
+    static final int[][] CARDINAL_UPDATE_ORDERS = {
+        { Directions.WEST , Directions.EAST , Directions.NORTH, Directions.SOUTH },
+        { Directions.NORTH, Directions.SOUTH, Directions.EAST , Directions.WEST  },
+        { Directions.EAST , Directions.WEST , Directions.SOUTH, Directions.NORTH },
+        { Directions.SOUTH, Directions.NORTH, Directions.WEST , Directions.EAST  }
+    };
+    /**
+     * The default update order of all cardinal directions.
+     */
+    static final int[] DEFAULT_CARDINAL_UPDATE_ORDER = CARDINAL_UPDATE_ORDERS[0];
+    /**
+     * The default update order of all directions. It is equivalent to the order of
+     * shape updates in vanilla Minecraft.
+     */
+    static final int[] DEFAULT_FULL_UPDATE_ORDER = {
+        Directions.WEST,
+        Directions.EAST,
+        Directions.NORTH,
+        Directions.SOUTH,
+        Directions.DOWN,
+        Directions.UP
+    };
+
+    // If Vanilla will ever multi-thread the ticking of levels, there should
+    // be only one WireHandler per level, in case redstone updates in multiple
+    // levels at the same time. There are already mods that add multi-threading
+    // as well.
+    private final ServerLevel level;
+
+    /** All the wires in the network. */
+    private final List<WireNode> network;
+    /** Map of wires and neighboring blocks. */
+    private final Long2ObjectMap<Node> nodes;
+    /** All the power changes that need to happen. */
+    private final Queue<WireNode> powerChanges;
+
+    private int rootCount;
+    // Rather than creating new nodes every time a network is updated we keep
+    // a cache of nodes that can be re-used.
+    private Node[] nodeCache;
+    private int nodeCount;
+
+    private boolean updatingPower;
+
+    public WireHandler(ServerLevel level) {
+        this.level = level;
+
+        this.network = new ArrayList<>();
+        this.nodes = new Long2ObjectOpenHashMap<>();
+        this.powerChanges = new PowerQueue();
+
+        this.nodeCache = new Node[16];
+        this.fillNodeCache(0, 16);
+    }
+
+    private Node getOrAddNode(BlockPos pos) {
+        return nodes.compute(pos.asLong(), (key, node) -> {
+            if (node == null) {
+                // If there is not yet a node at this position, retrieve and
+                // update one from the cache.
+                return getNextNode(pos);
+            }
+            if (node.invalid) {
+                return revalidateNode(node);
+            }
+
+            return node;
+        });
+    }
+
+    /**
+     * Retrieve the neighbor of a node in the given direction and create a link
+     * between the two nodes.
+     */
+    private Node getNeighbor(Node node, int iDir) {
+        Node neighbor = node.neighbors[iDir];
+
+        if (neighbor == null || neighbor.invalid) {
+            Direction dir = Directions.ALL[iDir];
+            BlockPos pos = node.pos.relative(dir);
+
+            Node oldNeighbor = neighbor;
+            neighbor = getOrAddNode(pos);
+
+            if (neighbor != oldNeighbor) {
+                int iOpp = Directions.iOpposite(iDir);
+
+                node.neighbors[iDir] = neighbor;
+                neighbor.neighbors[iOpp] = node;
+            }
+        }
+
+        return neighbor;
+    }
+
+    private Node removeNode(BlockPos pos) {
+        return nodes.remove(pos.asLong());
+    }
+
+    private Node revalidateNode(Node node) {
+        node.invalid = false;
+
+        if (node.isWire()) {
+            WireNode wire = node.asWire();
+
+            wire.prepared = false;
+            wire.inNetwork = false;
+        } else {
+            BlockPos pos = node.pos;
+            BlockState state = level.getBlockState(pos);
+
+            node.update(pos, state, false);
+        }
+
+        return node;
+    }
+
+    /**
+     * Check the BlockState that occupies the given position. If it is a wire, then
+     * create a new WireNode. Otherwise, grab the next Node from the cache and
+     * update it.
+     */
+    private Node getNextNode(BlockPos pos) {
+        BlockState state = level.getBlockState(pos);
+
+        if (state.is(Blocks.REDSTONE_WIRE)) {
+            return new WireNode(level, pos, state);
+        }
+
+        return getNextNode().update(pos, state, true);
+    }
+
+    /**
+     * Grab the first unused Node from the cache. If all of the cache is already in
+     * use, increase it in size first.
+     */
+    private Node getNextNode() {
+        if (nodeCount == nodeCache.length) {
+            increaseNodeCache();
+        }
+
+        return nodeCache[nodeCount++];
+    }
+
+    private void increaseNodeCache() {
+        Node[] oldCache = nodeCache;
+        nodeCache = new Node[oldCache.length << 1];
+
+        for (int index = 0; index < oldCache.length; index++) {
+            nodeCache[index] = oldCache[index];
+        }
+
+        fillNodeCache(oldCache.length, nodeCache.length);
+    }
+
+    private void fillNodeCache(int start, int end) {
+        for (int index = start; index < end; index++) {
+            nodeCache[index] = new Node(level);
+        }
+    }
+
+    /**
+     * This method should be called whenever a wire receives a block update.
+     */
+    public void onWireUpdated(BlockPos pos) {
+        invalidateNodes();
+        findRoots(pos, true);
+        tryUpdatePower();
+    }
+
+    /**
+     * This method should be called whenever a wire is placed.
+     */
+    public void onWireAdded(BlockPos pos) {
+        Node node = getOrAddNode(pos);
+
+        if (!node.isWire()) {
+            return; // we should never get here
+        }
+
+        WireNode wire = node.asWire();
+        wire.added = true;
+
+        invalidateNodes();
+        findRoots(pos, false);
+        tryUpdatePower();
+    }
+
+    /**
+     * This method should be called whenever a wire is removed.
+     */
+    public void onWireRemoved(BlockPos pos, BlockState state) {
+        Node node = removeNode(pos);
+        WireNode wire;
+
+        if (node == null || !node.isWire()) {
+            wire = new WireNode(level, pos, state);
+        } else {
+            wire = node.asWire();
+        }
+
+        wire.invalid = true;
+        wire.removed = true;
+
+        // If these fields are set to 'true', the removal of this wire was part of
+        // already ongoing power changes, so we can exit early here.
+        if (updatingPower && wire.shouldBreak) {
+            return;
+        }
+
+        invalidateNodes();
+        tryAddRoot(wire);
+        tryUpdatePower();
+    }
+
+    /**
+     * The nodes map is a snapshot of the state of the world. It becomes invalid
+     * when power changes are carried out, since the block and shape updates can
+     * lead to block changes. If these block changes cause the network to be updated
+     * again every node must be invalidated, and revalidated before it is used
+     * again. This ensures the power calculations of the network are accurate.
+     */
+    private void invalidateNodes() {
+        if (updatingPower && !nodes.isEmpty()) {
+            Iterator<Entry<Node>> it = Long2ObjectMaps.fastIterator(nodes);
+
+            while (it.hasNext()) {
+                Entry<Node> entry = it.next();
+                Node node = entry.getValue();
+
+                node.invalid = true;
+            }
+        }
+    }
+
+    /**
+     * Look for wires at and around the given position that are in an invalid state
+     * and require power changes. These wires are called 'roots' because it is only
+     * when these wires change power level that neighboring wires must adjust as
+     * well.
+     * 
+     * <p>
+     * While it is strictly only necessary to check the wire at the given position,
+     * if that wire is part of a network, it is beneficial to check its surroundings
+     * for other wires that require power changes. This is because a network can
+     * receive power at multiple points. Consider the following setup:
+     * 
+     * <p>
+     * (top-down view, W = wire, L = lever, _ = air/other)
+     * <br> {@code _ _ W _ _ }
+     * <br> {@code _ W W W _ }
+     * <br> {@code W W L W W }
+     * <br> {@code _ W W W _ }
+     * <br> {@code _ _ W _ _ }
+     * 
+     * <p>
+     * The lever powers four wires in the network at once. If this is identified
+     * correctly, the entire network can (un)power at once. While it is not
+     * practical to cover every possible situation where a network is (un)powered
+     * from multiple points at once, checking for common cases like the one
+     * described above is relatively straight-forward.
+     * 
+     * <p>
+     * While these extra checks can provide significant performance gains in some
+     * cases, in the majority of cases they will have little to no effect, but do
+     * require extra code modifications to all redstone power emitters. Removing
+     * these optimizations would limit code modifications to the RedStoneWireBlock
+     * and ServerLevel classes while leaving the performance mostly intact.
+     */
+    private void findRoots(BlockPos pos, boolean checkNeighbors) {
+        Node node = getOrAddNode(pos);
+
+        if (!node.isWire()) {
+            return; // we should never get here
+        }
+
+        WireNode wire = node.asWire();
+        tryAddRoot(wire);
+
+        // If the wire at the given position is not in an invalid state or is not
+        // part of a larger network, we can exit early.
+        if (!checkNeighbors || !wire.inNetwork || wire.connections.total == 0) {
+            return;
+        }
+
+        for (int iDir : DEFAULT_FULL_UPDATE_ORDER) {
+            Node neighbor = getNeighbor(wire, iDir);
+
+            if (neighbor.isConductor()) {
+                // Redstone components can power multiple wires through solid
+                // blocks.
+                findSignalSourcesAround(neighbor, Directions.iOpposite(iDir));
+            } else if (neighbor.state.isSignalSourceTo(level, neighbor.pos, Directions.ALL[iDir])) {
+                // Redstone components can also power multiple wires directly.
+                findRootsAroundSignalSource(neighbor, Directions.iOpposite(iDir));
+            }
+        }
+    }
+
+    /**
+     * Find signal sources around the given node that can provide direct signals
+     * to that node, and then search for wires that require power changes around
+     * those signal sources.
+     */
+    private void findSignalSourcesAround(Node node, int except) {
+        for (int iDir : Directions.I_EXCEPT[except]) {
+            Node neighbor = getNeighbor(node, iDir);
+
+            if (neighbor.state.isDirectSignalSourceTo(level, neighbor.pos, Directions.ALL[iDir])) {
+                findRootsAroundSignalSource(neighbor, iDir);
+            }
+        }
+    }
+
+    /**
+     * Find wires around the given signal source that require power changes.
+     */
+    private void findRootsAroundSignalSource(Node node, int except) {
+        for (int iDir : Directions.I_EXCEPT[except]) {
+            // Directions are backwards for redstone related methods, so we must
+            // check for power emitted in the opposite direction that we are
+            // interested in.
+            int iOpp = Directions.iOpposite(iDir);
+            Direction opp = Directions.ALL[iOpp];
+
+            boolean signal = node.state.isSignalSourceTo(level, node.pos, opp);
+            boolean directSignal = node.state.isDirectSignalSourceTo(level, node.pos, opp);
+
+            // If the signal source does not emit any power in this direction,
+            // move on to the next direction.
+            if (!signal && !directSignal) {
+                continue;
+            }
+
+            Node neighbor = getNeighbor(node, iDir);
+
+            if (signal && neighbor.isWire()) {
+                tryAddRoot(neighbor.asWire());
+            } else if (directSignal && neighbor.isConductor()) {
+                findRootsAround(neighbor, iOpp);
+            }
+        }
+    }
+
+    /**
+     * Look for wires around the given node that require power changes.
+     */
+    private void findRootsAround(Node node, int except) {
+        for (int iDir : Directions.I_EXCEPT[except]) {
+            Node neighbor = getNeighbor(node, iDir);
+
+            if (neighbor.isWire()) {
+                tryAddRoot(neighbor.asWire());
+            }
+        }
+    }
+
+    /**
+     * Check if the given wire is in an illegal state and needs power changes.
+     */
+    private void tryAddRoot(WireNode wire) {
+        // Each potential root needs to be checked only once.
+        if (wire.prepared) {
+            return;
+        }
+
+        prepare(wire);
+        findPower(wire, false);
+
+        if (needsPowerChange(wire)) {
+            addRoot(wire);
+        }
+    }
+
+    /**
+     * Add the given wire to the network as a root.
+     */
+    private void addRoot(WireNode wire) {
+        network.add(wire);
+        rootCount++;
+
+        wire.inNetwork = true;
+
+        if (wire.connections.iFlowDir >= 0) {
+            wire.iFlowDir = wire.connections.iFlowDir;
+        }
+    }
+
+    /**
+     * Before a wire can be added to the network, it must be properly prepared.
+     * This method
+     * <br>
+     * - checks if this wire should break. Rather than break the wire right away,
+     * its effects are integrated into the power calculations.
+     * <br>
+     * - determines the 'external power' this wire receives (power from non-wire
+     * components).
+     * <br>
+     * - finds connections this wire has to neighboring wires.
+     */
+    private void prepare(WireNode wire) {
+        // Each wire only needs to be prepared once.
+        if (wire.prepared) {
+            return;
+        }
+
+        wire.prepared = true;
+        wire.inNetwork = false;
+
+        if (!wire.removed && !wire.shouldBreak && !wire.state.canSurvive(level, wire.pos)) {
+            wire.shouldBreak = true;
+        }
+
+        wire.virtualPower = wire.externalPower = getInitialPower(wire);
+        wire.connections.set(this::getNeighbor);
+    }
+
+    private int getInitialPower(WireNode wire) {
+        return (wire.removed || wire.shouldBreak) ? Redstone.SIGNAL_MIN : getExternalPower(wire);
+    }
+
+    private int getExternalPower(WireNode wire) {
+        int power = Redstone.SIGNAL_MIN;
+
+        for (int iDir = 0; iDir < Directions.ALL.length; iDir++) {
+            Node neighbor = getNeighbor(wire, iDir);
+
+            // Power from wires is handled separately.
+            if (neighbor.isWire()) {
+                continue;
+            }
+
+            // Since 1.16 there is a block that is both a conductor and a signal
+            // source: the target block!
+            if (neighbor.isConductor()) {
+                power = Math.max(power, getDirectSignalTo(wire, neighbor, Directions.iOpposite(iDir)));
+            }
+            if (neighbor.isSignalSource()) {
+                power = Math.max(power, neighbor.state.getSignal(level, neighbor.pos, Directions.ALL[iDir]));
+            }
+
+            if (power >= Redstone.SIGNAL_MAX) {
+                return Redstone.SIGNAL_MAX;
+            }
+        }
+
+        return power;
+    }
+
+    /**
+     * Determine the direct signal the given wire receives from neighboring blocks
+     * through the given conductor node.
+     */
+    private int getDirectSignalTo(WireNode wire, Node node, int except) {
+        int power = Redstone.SIGNAL_MIN;
+
+        for (int iDir : Directions.I_EXCEPT[except]) {
+            Node neighbor = getNeighbor(node, iDir);
+
+            if (neighbor.isSignalSource()) {
+                power = Math.max(power, neighbor.state.getDirectSignal(level, neighbor.pos, Directions.ALL[iDir]));
+
+                if (power >= Redstone.SIGNAL_MAX) {
+                    return Redstone.SIGNAL_MAX;
+                }
+            }
+        }
+
+        return power;
+    }
+
+    /**
+     * Determine the power level the given wire receives from the blocks around it.
+     * Power from non-wire components has already been determined, so only power
+     * received from other wires needs to be checked. There are a few exceptions:
+     * <br>
+     * - If the wire is removed or going to break, its power level should always be
+     * the minimum value. This is because it (effectively) no longer exists, so
+     * cannot provide any power to neighboring wires.
+     * <br>
+     * - Power received from neighboring wires will never exceed {@code maxPower - 1},
+     * so if the external power is already larger than or equal to that, there is no
+     * need to check for power from neighboring wires.
+     */
+    private void findPower(WireNode wire, boolean ignoreNetwork) {
+        if (wire.removed || wire.shouldBreak || wire.externalPower >= (Redstone.SIGNAL_MAX - 1)) {
+            return;
+        }
+
+        // The virtual power is reset to the external power, so the flow information
+        // must be reset as well.
+        wire.virtualPower = wire.externalPower;
+        wire.flowIn = 0;
+
+        findWirePower(wire, ignoreNetwork);
+    }
+
+    /**
+     * Determine the power level the given wire receives from connected wires.
+     */
+    private void findWirePower(WireNode wire, boolean ignoreNetwork) {
+        wire.connections.forEach(connection -> {
+            if (!connection.accept) {
+                return;
+            }
+
+            WireNode neighbor = connection.wire;
+
+            if (!ignoreNetwork || !neighbor.inNetwork) {
+                int power = Math.max(Redstone.SIGNAL_MIN, neighbor.virtualPower - 1);
+                int iOpp = Directions.iOpposite(connection.iDir);
+
+                wire.offerPower(power, iOpp);
+            }
+        });
+    }
+
+    private boolean needsPowerChange(WireNode wire) {
+        return wire.removed || wire.shouldBreak || wire.virtualPower != wire.currentPower;
+    }
+
+    private void tryUpdatePower() {
+        if (rootCount > 0) {
+            updatePower();
+        }
+        if (!updatingPower) {
+            nodes.clear();
+            nodeCount = 0;
+        }
+    }
+
+    /**
+     * Propagate power changes through the network and notify neighboring blocks of
+     * these changes.
+     * 
+     * <p>
+     * Power changes are done in the following 3 steps.
+     * 
+     * <p>
+     * <b>1. Build up the network</b>
+     * <br>
+     * Collect all the wires around the roots that need to change their power
+     * levels.
+     * 
+     * <p>
+     * <b>2. Find powered wires</b>
+     * <br>
+     * Find those wires in the network that receive power from outside the network.
+     * This can come in 2 forms:
+     * <br>
+     * - Power from non-wire components (repeaters, torches, etc.).
+     * <br>
+     * - Power from wires that are not in the network.
+     * <br>
+     * These powered wires will then queue their power changes.
+     * 
+     * <p>
+     * <b>3. Let power flow</b>
+     * <br>
+     * Work through the queue of power changes. After each wire's power change, emit
+     * shape and block updates to neighboring blocks, then queue power changes for
+     * connected wires.
+     */
+    private void updatePower() {
+        // Build a network of wires that need power changes. This includes the roots
+        // as well as any wires that will be affected by power changes to those roots.
+        buildNetwork();
+
+        // Find those wires in the network that receive power from outside it.
+        // Remember that the power changes for those wires are already queued here!
+        findPoweredWires();
+
+        // Once the powered wires have been found, the network is no longer needed. In
+        // fact, it should be cleared before block and shape updates are emitted, in
+        // case a different network is updated that needs power changes.
+        network.clear();
+        rootCount = 0;
+
+        // Carry out the power changes and emit shape and block updates.
+        try {
+            letPowerFlow();
+        } catch (Throwable t) {
+            // If anything goes wrong while carrying out power changes, this field must
+            // be reset to 'false', or the wire handler will be locked out of carrying
+            // out power changes until the world is reloaded.
+            updatingPower = false;
+
+            throw t;
+        }
+    }
+
+    /**
+     * Build up a network of wires that need power changes. This includes the roots
+     * that were already added and any wires powered by those roots that will need
+     * power changes as a result of power changes to the roots.
+     */
+    private void buildNetwork() {
+        for (int index = 0; index < network.size(); index++) {
+            WireNode wire = network.get(index);
+
+            // The order in which wires are added to the network can influence the
+            // order in which they update their power levels.
+            wire.connections.forEach(connection -> {
+                if (!connection.offer) {
+                    return;
+                }
+
+                WireNode neighbor = connection.wire;
+
+                if (neighbor.inNetwork) {
+                    return;
+                }
+
+                prepare(neighbor);
+                findPower(neighbor, false);
+
+                if (needsPowerChange(neighbor)) {
+                    addToNetwork(neighbor, connection.iDir);
+                }
+            }, wire.iFlowDir);
+        }
+    }
+
+    /**
+     * Add the given wire to the network and set its outgoing flow to some backup
+     * value. This avoids directionality in redstone grids.
+     */
+    private void addToNetwork(WireNode wire, int iBackupFlowDir) {
+        network.add(wire);
+
+        wire.inNetwork = true;
+        // Normally the flow is not set until the power level is updated. However,
+        // in networks with multiple power sources the update order between them
+        // depends on which was discovered first. To make this less prone to
+        // directionality, each wire node is given a 'backup' flow. For roots, this
+        // is the determined flow of their connections. For non-roots this is the
+        // direction from which they were discovered.
+        wire.iFlowDir = iBackupFlowDir;
+    }
+
+    /**
+     * Find those wires in the network that receive power from outside it, either
+     * from non-wire components or from wires that are not in the network, and queue
+     * the power changes for those wires.
+     */
+    private void findPoweredWires() {
+        for (int index = 0; index < network.size(); index++) {
+            WireNode wire = network.get(index);
+            findPower(wire, true);
+
+            if (index < rootCount || wire.removed || wire.shouldBreak || wire.virtualPower > Redstone.SIGNAL_MIN) {
+                queuePowerChange(wire);
+            } else {
+                // Wires that do not receive any power do not queue power changes
+                // until they are offered power from a neighboring wire. To ensure
+                // that they accept any power from neighboring wires and thus queue
+                // their power changes, their virtual power is set to below the
+                // minimum.
+                wire.virtualPower--;
+            }
+        }
+    }
+
+    /**
+     * Queue the power change for the given wire. If the wire does not need a power
+     * change (perhaps because its power has already changed), transmit power to
+     * neighboring wires.
+     */
+    private void queuePowerChange(WireNode wire) {
+        if (needsPowerChange(wire)) {
+            powerChanges.offer(wire);
+        } else {
+            findPowerFlow(wire);
+            transmitPower(wire);
+        }
+    }
+
+    /**
+     * Use the information of incoming power flow to determine the direction of
+     * power flow through this wire. If that flow is ambiguous, try to use a flow
+     * direction based on connections to neighboring wires. If that is also
+     * ambiguous, use the backup value that was set when the wire was first added
+     * to the network.
+     */
+    private void findPowerFlow(WireNode wire) {
+        int flow = FLOW_IN_TO_FLOW_OUT[wire.flowIn];
+
+        if (flow >= 0) {
+            wire.iFlowDir = flow;
+        } else if (wire.connections.iFlowDir >= 0) {
+            wire.iFlowDir = wire.connections.iFlowDir;
+        }
+    }
+
+    /**
+     * Transmit power from the given wire to neighboring wires.
+     */
+    private void transmitPower(WireNode wire) {
+        int nextPower = Math.max(Redstone.SIGNAL_MIN, wire.virtualPower - 1);
+
+        wire.connections.forEach(connection -> {
+            if (!connection.offer) {
+                return;
+            }
+
+            WireNode neighbor = connection.wire;
+            int iDir = connection.iDir;
+
+            if (neighbor.offerPower(nextPower, iDir)) {
+                queuePowerChange(neighbor);
+            }
+        }, wire.iFlowDir);
+    }
+
+    /**
+     * Carry out power changes, setting the new power of each wire in the world,
+     * notifying neighbors of the power change, then queueing power changes of
+     * connected wires.
+     */
+    private void letPowerFlow() {
+        // If an instantaneous update chain causes updates to another network
+        // (or the same network in another place), new power changes will be
+        // integrated into the already ongoing power queue, so we can exit early
+        // here.
+        if (updatingPower) {
+            return;
+        }
+
+        updatingPower = true;
+
+        while (!powerChanges.isEmpty()) {
+            WireNode wire = powerChanges.poll();
+
+            if (!needsPowerChange(wire)) {
+                continue;
+            }
+
+            findPowerFlow(wire);
+
+            if (wire.setPower()) {
+                // If the wire was newly placed or removed, shape updates have
+                // already been emitted.
+                if (!wire.added && !wire.shouldBreak) {
+                    updateNeighborShapes(wire);
+                }
+
+                updateNeighborBlocks(wire);
+            }
+
+            transmitPower(wire);
+        }
+
+        updatingPower = false;
+    }
+
+    /**
+     * Emit shape updates around the given wire.
+     */
+    private void updateNeighborShapes(WireNode wire) {
+        BlockPos wirePos = wire.pos;
+        BlockState wireState = wire.state;
+
+        for (Direction dir : Block.UPDATE_SHAPE_ORDER) {
+            updateNeighborShape(wirePos.relative(dir), dir.getOpposite(), wirePos, wireState);
+        }
+    }
+
+    private void updateNeighborShape(BlockPos pos, Direction fromDir, BlockPos fromPos, BlockState fromState) {
+        BlockState state = level.getBlockState(pos);
+
+        // Shape updates to redstone wire are very expensive, and should never happen
+        // as a result of power changes anyway.
+        if (!state.isAir() && !state.is(Blocks.REDSTONE_WIRE)) {
+            BlockState newState = state.updateShape(fromDir, fromState, level, pos, fromPos);
+            Block.updateOrDestroy(state, newState, level, pos, Block.UPDATE_CLIENTS);
+        }
+    }
+
+    /**
+     * Emit block updates around the given wire. The order in which neighbors are
+     * updated is determined as follows:
+     * <br>
+     * 1. The direction of power flow through the wire is to be considered 'forward'.
+     * The order in which neighbors are updated depends on their relative positions
+     * to the wire.
+     * <br>
+     * 2. Each neighbor is identified by the step(s) you must take, starting at the
+     * wire, to reach it. Each step is 1 block, thus the position of a neighbor is
+     * encoded by the direction(s) of the step(s), e.g. (right), (down), (up, left),
+     * etc.
+     * <br>
+     * 3. Neighbors are updated in pairs that lie on opposite sides of the wire.
+     * <br>
+     * 4. Neighbors are updated in order of their distance from the wire. This means
+     * they are updated in 3 groups: direct neighbors are updated first, then
+     * diagonal neighbors, and last are the far neighbors that are 2 blocks directly
+     * out.
+     * <br>
+     * 5. The order within each group is determined using the following basic order:
+     * { front, back, right, left, down, up }. This order was chosen because it
+     * converts to the following order of absolute directions when west is said to
+     * be 'forward': { west, east, north, south, down, up } - this is the order of
+     * shape updates.
+     */
+    private void updateNeighborBlocks(WireNode wire) {
+        int iDir = wire.iFlowDir;
+
+        Direction forward   = Directions.HORIZONTAL[ iDir            ];
+        Direction rightward = Directions.HORIZONTAL[(iDir + 1) & 0b11];
+        Direction backward  = Directions.HORIZONTAL[(iDir + 2) & 0b11];
+        Direction leftward  = Directions.HORIZONTAL[(iDir + 3) & 0b11];
+        Direction downward  = Direction.DOWN;
+        Direction upward    = Direction.UP;
+
+        BlockPos self  = wire.pos;
+        BlockPos front = self.relative(forward);
+        BlockPos right = self.relative(rightward);
+        BlockPos back  = self.relative(backward);
+        BlockPos left  = self.relative(leftward);
+        BlockPos below = self.relative(downward);
+        BlockPos above = self.relative(upward);
+
+        // direct neighbors (6)
+        updateNeighbor(front, self);
+        updateNeighbor(back, self);
+        updateNeighbor(right, self);
+        updateNeighbor(left, self);
+        updateNeighbor(below, self);
+        updateNeighbor(above, self);
+
+        // diagonal neighbors (12)
+        updateNeighbor(front.relative(rightward), self);
+        updateNeighbor(back.relative(leftward), self);
+        updateNeighbor(front.relative(leftward), self);
+        updateNeighbor(back.relative(rightward), self);
+        updateNeighbor(front.relative(downward), self);
+        updateNeighbor(back.relative(upward), self);
+        updateNeighbor(front.relative(upward), self);
+        updateNeighbor(back.relative(downward), self);
+        updateNeighbor(right.relative(downward), self);
+        updateNeighbor(left.relative(upward), self);
+        updateNeighbor(right.relative(upward), self);
+        updateNeighbor(left.relative(downward), self);
+
+        // far neighbors (6)
+        updateNeighbor(front.relative(forward), self);
+        updateNeighbor(back.relative(backward), self);
+        updateNeighbor(right.relative(rightward), self);
+        updateNeighbor(left.relative(leftward), self);
+        updateNeighbor(below.relative(downward), self);
+        updateNeighbor(above.relative(upward), self);
+    }
+
+    private void updateNeighbor(BlockPos pos, BlockPos fromPos) {
+        BlockState state = level.getBlockState(pos);
+
+        // While this check makes sure wires in the network are not given block
+        // updates, it also prevents block updates to wires in neighboring networks.
+        // While this should not make a difference in theory, in practice, it is
+        // possible to force a network into an invalid state without updating it, even
+        // if it is relatively obscure.
+        // While I was willing to make this compromise in return for some significant
+        // performance gains in certain setups, if you are not, you can add all the
+        // positions of the network to a set and filter out block updates to wires in
+        // the network that way.
+        if (!state.isAir() && !state.is(Blocks.REDSTONE_WIRE)) {
+            state.neighborChanged(level, pos, Blocks.REDSTONE_WIRE, fromPos, false);
+        }
+    }
+
+    @FunctionalInterface
+    public interface NodeProvider {
+
+        public Node getNeighbor(Node node, int iDir);
+
+    }
+}
diff --git a/src/main/java/alternate/current/wire/WireNode.java b/src/main/java/alternate/current/wire/WireNode.java
new file mode 100644
index 0000000000000000000000000000000000000000..6b5bffd288e2f815d8c3788e73530e69d549e25e
--- /dev/null
+++ b/src/main/java/alternate/current/wire/WireNode.java
@@ -0,0 +1,117 @@
+package alternate.current.wire;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.util.Mth;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.RedStoneWireBlock;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.redstone.Redstone;
+
+/**
+ * A WireNode is a Node that represents a wire in the world. It stores
+ * all the information about the wire that the WireHandler needs to
+ * calculate power changes.
+ * 
+ * @author Space Walker
+ */
+public class WireNode extends Node {
+
+    final WireConnectionManager connections;
+
+    /** The power level this wire currently holds in the world. */
+    int currentPower;
+    /**
+     * While calculating power changes for a network, this field is used to keep
+     * track of the power level this wire should have.
+     */
+    int virtualPower;
+    /** The power level received from non-wire components. */
+    int externalPower;
+    /**
+     * A 4-bit number that keeps track of the power flow of the wires that give this
+     * wire its power level.
+     */
+    int flowIn;
+    /** The direction of power flow, based on the incoming flow. */
+    int iFlowDir;
+    boolean added;
+    boolean removed;
+    boolean shouldBreak;
+    boolean prepared;
+    boolean inNetwork;
+
+    /** The power for which this wire was queued. */
+    int power;
+    /** The previous wire in the power queue. */
+    WireNode prev;
+    /** The next wire in the power queue. */
+    WireNode next;
+
+    WireNode(ServerLevel level, BlockPos pos, BlockState state) {
+        super(level);
+
+        this.pos = pos.immutable();
+        this.state = state;
+
+        this.connections = new WireConnectionManager(this);
+
+        this.virtualPower = this.currentPower = this.state.getValue(RedStoneWireBlock.POWER);
+    }
+
+    @Override
+    public Node update(BlockPos pos, BlockState state, boolean clearNeighbors) {
+        throw new UnsupportedOperationException("Cannot update a WireNode!");
+    }
+
+    @Override
+    public boolean isWire() {
+        return true;
+    }
+
+    @Override
+    public WireNode asWire() {
+        return this;
+    }
+
+    int nextPower() {
+        return Mth.clamp(virtualPower, Redstone.SIGNAL_MIN, Redstone.SIGNAL_MAX);
+    }
+
+    boolean offerPower(int power, int iDir) {
+        if (removed || shouldBreak) {
+            return false;
+        }
+        if (power == virtualPower) {
+            flowIn |= (1 << iDir);
+            return false;
+        }
+        if (power > virtualPower) {
+            virtualPower = power;
+            flowIn = (1 << iDir);
+
+            return true;
+        }
+
+        return false;
+    }
+
+    boolean setPower() {
+        if (removed) {
+            return true;
+        }
+
+        state = level.getBlockState(pos);
+
+        if (shouldBreak) {
+            Block.dropResources(state, level, pos);
+            return level.setBlock(pos, Blocks.AIR.defaultBlockState(), Block.UPDATE_CLIENTS);
+        }
+
+        currentPower = LevelHelper.doRedstoneEvent(level, pos, currentPower, power);
+        state = state.setValue(RedStoneWireBlock.POWER, currentPower);
+
+        return LevelHelper.setWireState(level, pos, state, added);
+    }
+}
diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 3bec90dbf3456416d10e2234f4848122110f5c21..fba36a0fd7036ba516e14c8d3521b470b0df17d1 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -83,7 +83,7 @@ public class PaperWorldConfig {
     }
 
     public enum RedstoneImplementation {
-        VANILLA, EIGENCRAFT
+        VANILLA, EIGENCRAFT, ALTERNATE_CURRENT
     }
     public RedstoneImplementation redstoneImplementation = RedstoneImplementation.VANILLA;
     private void redstoneImplementation() {
@@ -104,7 +104,7 @@ public class PaperWorldConfig {
         }
         switch (implementation) {
             default:
-                logError("Invalid redstone-implementation config " + implementation + " - must be one of: vanilla, eigencraft");
+                logError("Invalid redstone-implementation config " + implementation + " - must be one of: vanilla, eigencraft, alternate-current");
             case "vanilla":
                 redstoneImplementation = RedstoneImplementation.VANILLA;
                 log("Using the Vanilla redstone implementation.");
@@ -113,6 +113,10 @@ public class PaperWorldConfig {
                 redstoneImplementation = RedstoneImplementation.EIGENCRAFT;
                 log("Using Eigencraft's redstone implementation by theosib.");
                 break;
+            case "alternate-current":
+                redstoneImplementation = RedstoneImplementation.ALTERNATE_CURRENT;
+                log("Using Alternate Current's redstone implementation by Space Walker.");
+                break;
         }
     }
 
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 62ec40de8ed8acb293ef21c8d2c624060d51cfe8..98209532ad3e692d7e459640123f78bbd9a65889 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -212,6 +212,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
     public final UUID uuid;
     public boolean hasPhysicsEvent = true; // Paper
     public boolean hasEntityMoveEvent = false; // Paper
+    private final alternate.current.wire.WireHandler wireHandler = new alternate.current.wire.WireHandler(this); // Paper - optimize redstone (Alternate Current)
     public static Throwable getAddToWorldStackTrace(Entity entity) {
         return new Throwable(entity + " Added to world at " + new java.util.Date());
     }
@@ -2407,6 +2408,13 @@ public class ServerLevel extends Level implements WorldGenLevel {
         return this.entityManager.canPositionTick(pos.toLong()); // Paper
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public alternate.current.wire.WireHandler getWireHandler() {
+        return wireHandler;
+    }
+    // Paper end
+
     private final class EntityCallbacks implements LevelCallback<Entity> {
 
         EntityCallbacks() {}
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 160c0f37aa3aaf7598f852acf9bd444f79444c97..fee8996f35b38fd79946cdfd677763e0201eb57d 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -1499,4 +1499,15 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
         return ret;
     }
     // Paper end
+
+    // Paper start - optimize redstone (Alternate Current)
+    public alternate.current.wire.WireHandler getWireHandler() {
+        // This method is overridden in ServerLevel.
+        // Since Paper is a server platform there is no risk
+        // of this implementation being called. It is here
+        // only so this method can be called without casting
+        // an instance of Level to ServerLevel.
+        return null;
+    }
+    // Paper end
 }
diff --git a/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java b/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java
index 2036006b934ba1f27da606320b4c456af019a361..9d1d59fe26eff0640906037aba93e73dda433d0d 100644
--- a/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java
@@ -153,6 +153,18 @@ public abstract class BasePressurePlateBlock extends Block {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return dir == Direction.UP;
+    }
+    // Paper end
+
     @Override
     public PushReaction getPistonPushReaction(BlockState state) {
         return PushReaction.DESTROY;
diff --git a/src/main/java/net/minecraft/world/level/block/ButtonBlock.java b/src/main/java/net/minecraft/world/level/block/ButtonBlock.java
index b7f37475192bf79252482314080c9ba08e9aefdb..8b6eeb1ccad3a2e3858b70e59819c79485a2e538 100644
--- a/src/main/java/net/minecraft/world/level/block/ButtonBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/ButtonBlock.java
@@ -159,6 +159,18 @@ public abstract class ButtonBlock extends FaceAttachedHorizontalDirectionalBlock
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return getConnectedDirection(state) == dir;
+    }
+    // Paper end
+
     @Override
     public void tick(BlockState state, ServerLevel world, BlockPos pos, Random random) {
         if ((Boolean) state.getValue(ButtonBlock.POWERED)) {
diff --git a/src/main/java/net/minecraft/world/level/block/DaylightDetectorBlock.java b/src/main/java/net/minecraft/world/level/block/DaylightDetectorBlock.java
index 40b0380aa6fd052bf6376a15939c08e603f2f60c..e57c5242866165e589277bd0184098c7806538ba 100644
--- a/src/main/java/net/minecraft/world/level/block/DaylightDetectorBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DaylightDetectorBlock.java
@@ -99,6 +99,13 @@ public class DaylightDetectorBlock extends BaseEntityBlock {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+    // Paper end
+
     @Override
     public BlockEntity newBlockEntity(BlockPos pos, BlockState state) {
         return new DaylightDetectorBlockEntity(pos, state);
diff --git a/src/main/java/net/minecraft/world/level/block/DiodeBlock.java b/src/main/java/net/minecraft/world/level/block/DiodeBlock.java
index 9c764d2273d70b8dffcaa7f324544cb48f12acc3..7f0aa1e8b53a749459fb8cb99c73c6c2c60ea4e9 100644
--- a/src/main/java/net/minecraft/world/level/block/DiodeBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DiodeBlock.java
@@ -159,6 +159,18 @@ public abstract class DiodeBlock extends HorizontalDirectionalBlock {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return state.getValue(FACING) == dir;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return state.getValue(FACING) == dir;
+    }
+    // Paper end
+
     @Override
     public BlockState getStateForPlacement(BlockPlaceContext ctx) {
         return (BlockState) this.defaultBlockState().setValue(DiodeBlock.FACING, ctx.getHorizontalDirection().getOpposite());
diff --git a/src/main/java/net/minecraft/world/level/block/LecternBlock.java b/src/main/java/net/minecraft/world/level/block/LecternBlock.java
index 25ed6dfef2887612a02fcf8884dc8dac4fbd64ff..7f6f14e7858c2577e44ace8370621114dce29ea8 100644
--- a/src/main/java/net/minecraft/world/level/block/LecternBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LecternBlock.java
@@ -220,6 +220,18 @@ public class LecternBlock extends BaseEntityBlock {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return dir == Direction.UP;
+    }
+    // Paper end;
+
     @Override
     public int getSignal(BlockState state, BlockGetter world, BlockPos pos, Direction direction) {
         return (Boolean) state.getValue(LecternBlock.POWERED) ? 15 : 0;
diff --git a/src/main/java/net/minecraft/world/level/block/LeverBlock.java b/src/main/java/net/minecraft/world/level/block/LeverBlock.java
index 1093dc8595e42a90e74e19f74965f5be07a1d6cf..6e7320f5b8e2cf030b96f2ab80c8fb885b0fe1e3 100644
--- a/src/main/java/net/minecraft/world/level/block/LeverBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LeverBlock.java
@@ -165,6 +165,18 @@ public class LeverBlock extends FaceAttachedHorizontalDirectionalBlock {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return getConnectedDirection(state) == dir;
+    }
+    // Paper end
+
     private void updateNeighbours(BlockState state, Level world, BlockPos pos) {
         world.updateNeighborsAt(pos, this);
         world.updateNeighborsAt(pos.relative(getConnectedDirection(state).getOpposite()), this);
diff --git a/src/main/java/net/minecraft/world/level/block/LightningRodBlock.java b/src/main/java/net/minecraft/world/level/block/LightningRodBlock.java
index b7605dda79c4d907f5822a0ded694b080e08dae5..ff24cbf03e937572a0c21fe298557d4eab8760b9 100644
--- a/src/main/java/net/minecraft/world/level/block/LightningRodBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LightningRodBlock.java
@@ -166,4 +166,16 @@ public class LightningRodBlock extends RodBlock implements SimpleWaterloggedBloc
     public boolean isSignalSource(BlockState state) {
         return true;
     }
+
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return state.getValue(FACING) == dir;
+    }
+    // Paper end
 }
diff --git a/src/main/java/net/minecraft/world/level/block/ObserverBlock.java b/src/main/java/net/minecraft/world/level/block/ObserverBlock.java
index 4a34a08a1d46e4d3020644a51d9e30a36a18791a..358a40eb9b4be4d2b5446270f90b51138a19b051 100644
--- a/src/main/java/net/minecraft/world/level/block/ObserverBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/ObserverBlock.java
@@ -90,6 +90,18 @@ public class ObserverBlock extends DirectionalBlock {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return state.getValue(FACING) == dir;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return state.getValue(FACING) == dir;
+    }
+    // Paper end
+
     @Override
     public int getDirectSignal(BlockState state, BlockGetter world, BlockPos pos, Direction direction) {
         return state.getSignal(world, pos, direction);
diff --git a/src/main/java/net/minecraft/world/level/block/PoweredBlock.java b/src/main/java/net/minecraft/world/level/block/PoweredBlock.java
index 0afffc33f3be221a28c62115f493808aeffb1bd8..0bd23df47085d578102a28157e309b585f4231f8 100644
--- a/src/main/java/net/minecraft/world/level/block/PoweredBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/PoweredBlock.java
@@ -16,6 +16,13 @@ public class PoweredBlock extends Block {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(net.minecraft.world.level.Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+    // Paper end
+
     @Override
     public int getSignal(BlockState state, BlockGetter world, BlockPos pos, Direction direction) {
         return 15;
diff --git a/src/main/java/net/minecraft/world/level/block/RedStoneWireBlock.java b/src/main/java/net/minecraft/world/level/block/RedStoneWireBlock.java
index 0acc3b550a5bb809fe99708368114eaccb227312..b2522849d34bbd530c7086b6fbb0582f2d38fef7 100644
--- a/src/main/java/net/minecraft/world/level/block/RedStoneWireBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/RedStoneWireBlock.java
@@ -255,7 +255,7 @@ public class RedStoneWireBlock extends Block {
         return floor.isFaceSturdy(world, pos, Direction.UP) || floor.is(Blocks.HOPPER);
     }
 
-    // Paper start - Optimize redstone
+    // Paper start - Optimize redstone (Eigencraft)
     // The bulk of the new functionality is found in RedstoneWireTurbo.java
     com.destroystokyo.paper.util.RedstoneWireTurbo turbo = new com.destroystokyo.paper.util.RedstoneWireTurbo(this);
 
@@ -462,7 +462,13 @@ public class RedStoneWireBlock extends Block {
     @Override
     public void onPlace(BlockState state, Level world, BlockPos pos, BlockState oldState, boolean notify) {
         if (!oldState.is(state.getBlock()) && !world.isClientSide) {
-            this.updateSurroundingRedstone(world, pos, state, null); // Paper - Optimize redstone
+            // Paper start - optimize redstone - replace call to updatePowerStrength
+            if (world.paperConfig.redstoneImplementation == com.destroystokyo.paper.PaperWorldConfig.RedstoneImplementation.ALTERNATE_CURRENT) {
+                world.getWireHandler().onWireAdded(pos); // Alternate Current
+            } else {
+                this.updateSurroundingRedstone(world, pos, state, null); // vanilla/Eigencraft
+            }
+            // Paper end
             Iterator iterator = Direction.Plane.VERTICAL.iterator();
 
             while (iterator.hasNext()) {
@@ -489,7 +495,13 @@ public class RedStoneWireBlock extends Block {
                     world.updateNeighborsAt(pos.relative(enumdirection), this);
                 }
 
-                this.updateSurroundingRedstone(world, pos, state, null); // Paper - Optimize redstone
+                // Paper start - optimize redstone - replace call to updatePowerStrength
+                if (world.paperConfig.redstoneImplementation == com.destroystokyo.paper.PaperWorldConfig.RedstoneImplementation.ALTERNATE_CURRENT) {
+                    world.getWireHandler().onWireRemoved(pos, state); // Alternate Current
+                } else {
+                    this.updateSurroundingRedstone(world, pos, state, null); // vanilla/Eigencraft
+                }
+                // Paper end
                 this.updateNeighborsOfNeighboringWires(world, pos);
             }
         }
@@ -523,8 +535,14 @@ public class RedStoneWireBlock extends Block {
     @Override
     public void neighborChanged(BlockState state, Level world, BlockPos pos, Block block, BlockPos fromPos, boolean notify) {
         if (!world.isClientSide) {
+            // Paper start - optimize redstone (Alternate Current)
+            // Alternate Current handles breaking of redstone wires in the WireHandler.
+            if (world.paperConfig.redstoneImplementation == com.destroystokyo.paper.PaperWorldConfig.RedstoneImplementation.ALTERNATE_CURRENT) {
+                world.getWireHandler().onWireUpdated(pos);
+            } else
+            // Paper end
             if (state.canSurvive(world, pos)) {
-                this.updateSurroundingRedstone(world, pos, state, fromPos); // Paper - Optimize redstone
+                this.updateSurroundingRedstone(world, pos, state, fromPos); // Paper - optimize redstone (Eigencraft)
             } else {
                 dropResources(state, world, pos);
                 world.removeBlock(pos, false);
diff --git a/src/main/java/net/minecraft/world/level/block/RedstoneTorchBlock.java b/src/main/java/net/minecraft/world/level/block/RedstoneTorchBlock.java
index 954b86bea345a8e0e3a8dd425f356db6f5cd496f..3731749436c86210954e4213f893a51eea06230a 100644
--- a/src/main/java/net/minecraft/world/level/block/RedstoneTorchBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/RedstoneTorchBlock.java
@@ -139,6 +139,18 @@ public class RedstoneTorchBlock extends TorchBlock {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return dir != Direction.UP;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return dir == Direction.DOWN;
+    }
+    // Paper end
+
     @Override
     public void animateTick(BlockState state, Level world, BlockPos pos, Random random) {
         if ((Boolean) state.getValue(RedstoneTorchBlock.LIT)) {
diff --git a/src/main/java/net/minecraft/world/level/block/RedstoneWallTorchBlock.java b/src/main/java/net/minecraft/world/level/block/RedstoneWallTorchBlock.java
index 5cf0ae04059533385a19f7b07909a67b57350c09..ec5c201ebac0e1b44b90319884ce968a9212f3b2 100644
--- a/src/main/java/net/minecraft/world/level/block/RedstoneWallTorchBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/RedstoneWallTorchBlock.java
@@ -76,6 +76,13 @@ public class RedstoneWallTorchBlock extends RedstoneTorchBlock {
         return state.getValue(LIT) && state.getValue(FACING) != direction ? 15 : 0;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return state.getValue(FACING) != dir;
+    }
+    // Paper end
+
     @Override
     public BlockState rotate(BlockState state, Rotation rotation) {
         return Blocks.WALL_TORCH.rotate(state, rotation);
diff --git a/src/main/java/net/minecraft/world/level/block/SculkSensorBlock.java b/src/main/java/net/minecraft/world/level/block/SculkSensorBlock.java
index 33bca696c1ae0a63055eea5d2e05551458da50b4..4a0e4b9c49f04d63ca0b7d0a6ce71680f911ff29 100644
--- a/src/main/java/net/minecraft/world/level/block/SculkSensorBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/SculkSensorBlock.java
@@ -206,6 +206,13 @@ public class SculkSensorBlock extends BaseEntityBlock implements SimpleWaterlogg
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+    // Paper end
+
     @Override
     public int getSignal(BlockState state, BlockGetter world, BlockPos pos, Direction direction) {
         return (Integer) state.getValue(SculkSensorBlock.POWER);
diff --git a/src/main/java/net/minecraft/world/level/block/TargetBlock.java b/src/main/java/net/minecraft/world/level/block/TargetBlock.java
index 20955a3944a2fcb66ad98267ef3570ddfc32980e..1a8064ce899a920c1b3a0cd98eb5b5c37d536ff2 100644
--- a/src/main/java/net/minecraft/world/level/block/TargetBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/TargetBlock.java
@@ -112,6 +112,13 @@ public class TargetBlock extends Block {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+    // Paper end
+
     @Override
     protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> builder) {
         builder.add(OUTPUT_POWER);
diff --git a/src/main/java/net/minecraft/world/level/block/TrappedChestBlock.java b/src/main/java/net/minecraft/world/level/block/TrappedChestBlock.java
index 184c70cd2954f4904518c3fee2a377d9c4e81cc3..316fd2758a3a981fd1a5e3603a4b7a064270f7fb 100644
--- a/src/main/java/net/minecraft/world/level/block/TrappedChestBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/TrappedChestBlock.java
@@ -36,6 +36,18 @@ public class TrappedChestBlock extends ChestBlock {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(net.minecraft.world.level.Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(net.minecraft.world.level.Level level, BlockPos pos, BlockState state, Direction dir) {
+        return dir == Direction.UP;
+    }
+    // Paper end
+
     @Override
     public int getSignal(BlockState state, BlockGetter world, BlockPos pos, Direction direction) {
         return Mth.clamp(ChestBlockEntity.getOpenCount(world, pos), 0, 15);
diff --git a/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java b/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
index a4344bf2267112e3c1e31c07c9f6b8eae9666947..5e973eb53b240615e70b7d46ef4dc17b907ecaf9 100644
--- a/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
@@ -265,6 +265,18 @@ public class TripWireHookBlock extends Block {
         return true;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    @Override
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return true;
+    }
+
+    @Override
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return state.getValue(FACING) == dir;
+    }
+    // Paper end
+
     @Override
     public BlockState rotate(BlockState state, Rotation rotation) {
         return (BlockState) state.setValue(TripWireHookBlock.FACING, rotation.rotate((Direction) state.getValue(TripWireHookBlock.FACING)));
diff --git a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
index 61590f2f04a797235299f1bd6b78a08f5bfe4a33..7f83c9390823b42fc30d04e1d3222e2825eaad50 100644
--- a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
+++ b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
@@ -70,7 +70,7 @@ import net.minecraft.world.phys.shapes.VoxelShape;
 
 public abstract class BlockBehaviour {
 
-    protected static final Direction[] UPDATE_SHAPE_ORDER = new Direction[]{Direction.WEST, Direction.EAST, Direction.NORTH, Direction.SOUTH, Direction.DOWN, Direction.UP};
+    public static final Direction[] UPDATE_SHAPE_ORDER = new Direction[]{Direction.WEST, Direction.EAST, Direction.NORTH, Direction.SOUTH, Direction.DOWN, Direction.UP}; // Paper - public
     protected final Material material;
     public final boolean hasCollision;
     protected final float explosionResistance;
@@ -187,6 +187,16 @@ public abstract class BlockBehaviour {
         return false;
     }
 
+    // Paper start - optimize redstone (Alternate Current)
+    public boolean isSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return false;
+    }
+
+    public boolean isDirectSignalSourceTo(Level level, BlockPos pos, BlockState state, Direction dir) {
+        return false;
+    }
+    // Paper end
+
     /** @deprecated */
     @Deprecated
     public PushReaction getPistonPushReaction(BlockState state) {
@@ -846,6 +856,16 @@ public abstract class BlockBehaviour {
             return this.getBlock().isSignalSource(this.asState());
         }
 
+        // Paper start - optimize redstone (Alternate Current)
+        public boolean isSignalSourceTo(Level level, BlockPos pos, Direction dir) {
+            return this.getBlock().isSignalSourceTo(level, pos, this.asState(), dir);
+        }
+
+        public boolean isDirectSignalSourceTo(Level level, BlockPos pos, Direction dir) {
+            return this.getBlock().isDirectSignalSourceTo(level, pos, this.asState(), dir);
+        }
+        // Paper end
+
         public int getSignal(BlockGetter world, BlockPos pos, Direction direction) {
             return this.getBlock().getSignal(this.asState(), world, pos, direction);
         }