aboutsummaryrefslogtreecommitdiffstats
path: root/code/botlib/be_aas_route.c
blob: 9275bf2299b957649d057198b5cf0618ab5c593a (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
/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

Quake III Arena source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/

/*****************************************************************************
 * name:		be_aas_route.c
 *
 * desc:		AAS
 *
 * $Archive: /MissionPack/code/botlib/be_aas_route.c $
 *
 *****************************************************************************/

#include "../qcommon/q_shared.h"
#include "l_utils.h"
#include "l_memory.h"
#include "l_log.h"
#include "l_crc.h"
#include "l_libvar.h"
#include "l_script.h"
#include "l_precomp.h"
#include "l_struct.h"
#include "aasfile.h"
#include "botlib.h"
#include "be_aas.h"
#include "be_aas_funcs.h"
#include "be_interface.h"
#include "be_aas_def.h"

#define ROUTING_DEBUG

//travel time in hundreths of a second = distance * 100 / speed
#define DISTANCEFACTOR_CROUCH		1.3f		//crouch speed = 100
#define DISTANCEFACTOR_SWIM			1		//should be 0.66, swim speed = 150
#define DISTANCEFACTOR_WALK			0.33f	//walk speed = 300

//cache refresh time
#define CACHE_REFRESHTIME		15.0f	//15 seconds refresh time

//maximum number of routing updates each frame
#define MAX_FRAMEROUTINGUPDATES		10


/*

  area routing cache:
  stores the distances within one cluster to a specific goal area
  this goal area is in this same cluster and could be a cluster portal
  for every cluster there's a list with routing cache for every area
  in that cluster (including the portals of that cluster)
  area cache stores aasworld.clusters[?].numreachabilityareas travel times

  portal routing cache:
  stores the distances of all portals to a specific goal area
  this goal area could be in any cluster and could also be a cluster portal
  for every area (aasworld.numareas) the portal cache stores
  aasworld.numportals travel times

*/

#ifdef ROUTING_DEBUG
int numareacacheupdates;
int numportalcacheupdates;
#endif //ROUTING_DEBUG

int routingcachesize;
int max_routingcachesize;

//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
#ifdef ROUTING_DEBUG
void AAS_RoutingInfo(void)
{
	botimport.Print(PRT_MESSAGE, "%d area cache updates\n", numareacacheupdates);
	botimport.Print(PRT_MESSAGE, "%d portal cache updates\n", numportalcacheupdates);
	botimport.Print(PRT_MESSAGE, "%d bytes routing cache\n", routingcachesize);
} //end of the function AAS_RoutingInfo
#endif //ROUTING_DEBUG
//===========================================================================
// returns the number of the area in the cluster
// assumes the given area is in the given cluster or a portal of the cluster
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
__inline int AAS_ClusterAreaNum(int cluster, int areanum)
{
	int side, areacluster;

	areacluster = aasworld.areasettings[areanum].cluster;
	if (areacluster > 0) return aasworld.areasettings[areanum].clusterareanum;
	else
	{
/*#ifdef ROUTING_DEBUG
		if (aasworld.portals[-areacluster].frontcluster != cluster &&
				aasworld.portals[-areacluster].backcluster != cluster)
		{
			botimport.Print(PRT_ERROR, "portal %d: does not belong to cluster %d\n"
											, -areacluster, cluster);
		} //end if
#endif //ROUTING_DEBUG*/
		side = aasworld.portals[-areacluster].frontcluster != cluster;
		return aasworld.portals[-areacluster].clusterareanum[side];
	} //end else
} //end of the function AAS_ClusterAreaNum
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_InitTravelFlagFromType(void)
{
	int i;

	for (i = 0; i < MAX_TRAVELTYPES; i++)
	{
		aasworld.travelflagfortype[i] = TFL_INVALID;
	} //end for
	aasworld.travelflagfortype[TRAVEL_INVALID] = TFL_INVALID;
	aasworld.travelflagfortype[TRAVEL_WALK] = TFL_WALK;
	aasworld.travelflagfortype[TRAVEL_CROUCH] = TFL_CROUCH;
	aasworld.travelflagfortype[TRAVEL_BARRIERJUMP] = TFL_BARRIERJUMP;
	aasworld.travelflagfortype[TRAVEL_JUMP] = TFL_JUMP;
	aasworld.travelflagfortype[TRAVEL_LADDER] = TFL_LADDER;
	aasworld.travelflagfortype[TRAVEL_WALKOFFLEDGE] = TFL_WALKOFFLEDGE;
	aasworld.travelflagfortype[TRAVEL_SWIM] = TFL_SWIM;
	aasworld.travelflagfortype[TRAVEL_WATERJUMP] = TFL_WATERJUMP;
	aasworld.travelflagfortype[TRAVEL_TELEPORT] = TFL_TELEPORT;
	aasworld.travelflagfortype[TRAVEL_ELEVATOR] = TFL_ELEVATOR;
	aasworld.travelflagfortype[TRAVEL_ROCKETJUMP] = TFL_ROCKETJUMP;
	aasworld.travelflagfortype[TRAVEL_BFGJUMP] = TFL_BFGJUMP;
	aasworld.travelflagfortype[TRAVEL_GRAPPLEHOOK] = TFL_GRAPPLEHOOK;
	aasworld.travelflagfortype[TRAVEL_DOUBLEJUMP] = TFL_DOUBLEJUMP;
	aasworld.travelflagfortype[TRAVEL_RAMPJUMP] = TFL_RAMPJUMP;
	aasworld.travelflagfortype[TRAVEL_STRAFEJUMP] = TFL_STRAFEJUMP;
	aasworld.travelflagfortype[TRAVEL_JUMPPAD] = TFL_JUMPPAD;
	aasworld.travelflagfortype[TRAVEL_FUNCBOB] = TFL_FUNCBOB;
} //end of the function AAS_InitTravelFlagFromType
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
__inline int AAS_TravelFlagForType_inline(int traveltype)
{
	int tfl;

	tfl = 0;
	if (tfl & TRAVELFLAG_NOTTEAM1)
		tfl |= TFL_NOTTEAM1;
	if (tfl & TRAVELFLAG_NOTTEAM2)
		tfl |= TFL_NOTTEAM2;
	traveltype &= TRAVELTYPE_MASK;
	if (traveltype < 0 || traveltype >= MAX_TRAVELTYPES)
		return TFL_INVALID;
	tfl |= aasworld.travelflagfortype[traveltype];
	return tfl;
} //end of the function AAS_TravelFlagForType_inline
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_TravelFlagForType(int traveltype)
{
	return AAS_TravelFlagForType_inline(traveltype);
} //end of the function AAS_TravelFlagForType_inline
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_UnlinkCache(aas_routingcache_t *cache)
{
	if (cache->time_next) cache->time_next->time_prev = cache->time_prev;
	else aasworld.newestcache = cache->time_prev;
	if (cache->time_prev) cache->time_prev->time_next = cache->time_next;
	else aasworld.oldestcache = cache->time_next;
	cache->time_next = NULL;
	cache->time_prev = NULL;
} //end of the function AAS_UnlinkCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_LinkCache(aas_routingcache_t *cache)
{
	if (aasworld.newestcache)
	{
		aasworld.newestcache->time_next = cache;
		cache->time_prev = aasworld.newestcache;
	} //end if
	else
	{
		aasworld.oldestcache = cache;
		cache->time_prev = NULL;
	} //end else
	cache->time_next = NULL;
	aasworld.newestcache = cache;
} //end of the function AAS_LinkCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_FreeRoutingCache(aas_routingcache_t *cache)
{
	AAS_UnlinkCache(cache);
	routingcachesize -= cache->size;
	FreeMemory(cache);
} //end of the function AAS_FreeRoutingCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_RemoveRoutingCacheInCluster( int clusternum )
{
	int i;
	aas_routingcache_t *cache, *nextcache;
	aas_cluster_t *cluster;

	if (!aasworld.clusterareacache)
		return;
	cluster = &aasworld.clusters[clusternum];
	for (i = 0; i < cluster->numareas; i++)
	{
		for (cache = aasworld.clusterareacache[clusternum][i]; cache; cache = nextcache)
		{
			nextcache = cache->next;
			AAS_FreeRoutingCache(cache);
		} //end for
		aasworld.clusterareacache[clusternum][i] = NULL;
	} //end for
} //end of the function AAS_RemoveRoutingCacheInCluster
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_RemoveRoutingCacheUsingArea( int areanum )
{
	int i, clusternum;
	aas_routingcache_t *cache, *nextcache;

	clusternum = aasworld.areasettings[areanum].cluster;
	if (clusternum > 0)
	{
		//remove all the cache in the cluster the area is in
		AAS_RemoveRoutingCacheInCluster( clusternum );
	} //end if
	else
	{
		// if this is a portal remove all cache in both the front and back cluster
		AAS_RemoveRoutingCacheInCluster( aasworld.portals[-clusternum].frontcluster );
		AAS_RemoveRoutingCacheInCluster( aasworld.portals[-clusternum].backcluster );
	} //end else
	// remove all portal cache
	for (i = 0; i < aasworld.numareas; i++)
	{
		//refresh portal cache
		for (cache = aasworld.portalcache[i]; cache; cache = nextcache)
		{
			nextcache = cache->next;
			AAS_FreeRoutingCache(cache);
		} //end for
		aasworld.portalcache[i] = NULL;
	} //end for
} //end of the function AAS_RemoveRoutingCacheUsingArea
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_EnableRoutingArea(int areanum, int enable)
{
	int flags;

	if (areanum <= 0 || areanum >= aasworld.numareas)
	{
		if (bot_developer)
		{
			botimport.Print(PRT_ERROR, "AAS_EnableRoutingArea: areanum %d out of range\n", areanum);
		} //end if
		return 0;
	} //end if
	flags = aasworld.areasettings[areanum].areaflags & AREA_DISABLED;
	if (enable < 0)
		return !flags;

	if (enable)
		aasworld.areasettings[areanum].areaflags &= ~AREA_DISABLED;
	else
		aasworld.areasettings[areanum].areaflags |= AREA_DISABLED;
	// if the status of the area changed
	if ( (flags & AREA_DISABLED) != (aasworld.areasettings[areanum].areaflags & AREA_DISABLED) )
	{
		//remove all routing cache involving this area
		AAS_RemoveRoutingCacheUsingArea( areanum );
	} //end if
	return !flags;
} //end of the function AAS_EnableRoutingArea
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
__inline float AAS_RoutingTime(void)
{
	return AAS_Time();
} //end of the function AAS_RoutingTime
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int AAS_GetAreaContentsTravelFlags(int areanum)
{
	int contents, tfl;

	contents = aasworld.areasettings[areanum].contents;
	tfl = 0;
	if (contents & AREACONTENTS_WATER)
		tfl |= TFL_WATER;
	else if (contents & AREACONTENTS_SLIME)
		tfl |= TFL_SLIME;
	else if (contents & AREACONTENTS_LAVA)
		tfl |= TFL_LAVA;
	else
		tfl |= TFL_AIR;
	if (contents & AREACONTENTS_DONOTENTER)
		tfl |= TFL_DONOTENTER;
	if (contents & AREACONTENTS_NOTTEAM1)
		tfl |= TFL_NOTTEAM1;
	if (contents & AREACONTENTS_NOTTEAM2)
		tfl |= TFL_NOTTEAM2;
	if (aasworld.areasettings[areanum].areaflags & AREA_BRIDGE)
		tfl |= TFL_BRIDGE;
	return tfl;
} //end of the function AAS_GetAreaContentsTravelFlags
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
__inline int AAS_AreaContentsTravelFlags_inline(int areanum)
{
	return aasworld.areacontentstravelflags[areanum];
} //end of the function AAS_AreaContentsTravelFlags
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_AreaContentsTravelFlags(int areanum)
{
	return aasworld.areacontentstravelflags[areanum];
} //end of the function AAS_AreaContentsTravelFlags
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_InitAreaContentsTravelFlags(void)
{
	int i;

	if (aasworld.areacontentstravelflags) FreeMemory(aasworld.areacontentstravelflags);
	aasworld.areacontentstravelflags = (int *) GetClearedMemory(aasworld.numareas * sizeof(int));
	//
	for (i = 0; i < aasworld.numareas; i++) {
		aasworld.areacontentstravelflags[i] = AAS_GetAreaContentsTravelFlags(i);
	}
} //end of the function AAS_InitAreaContentsTravelFlags
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_CreateReversedReachability(void)
{
	int i, n;
	aas_reversedlink_t *revlink;
	aas_reachability_t *reach;
	aas_areasettings_t *settings;
	char *ptr;
#ifdef DEBUG
	int starttime;

	starttime = Sys_MilliSeconds();
#endif
	//free reversed links that have already been created
	if (aasworld.reversedreachability) FreeMemory(aasworld.reversedreachability);
	//allocate memory for the reversed reachability links
	ptr = (char *) GetClearedMemory(aasworld.numareas * sizeof(aas_reversedreachability_t) +
							aasworld.reachabilitysize * sizeof(aas_reversedlink_t));
	//
	aasworld.reversedreachability = (aas_reversedreachability_t *) ptr;
	//pointer to the memory for the reversed links
	ptr += aasworld.numareas * sizeof(aas_reversedreachability_t);
	//check all reachabilities of all areas
	for (i = 1; i < aasworld.numareas; i++)
	{
		//settings of the area
		settings = &aasworld.areasettings[i];
		//
		if (settings->numreachableareas >= 128)
			botimport.Print(PRT_WARNING, "area %d has more than 128 reachabilities\n", i);
		//create reversed links for the reachabilities
		for (n = 0; n < settings->numreachableareas && n < 128; n++)
		{
			//reachability link
			reach = &aasworld.reachability[settings->firstreachablearea + n];
			//
			revlink = (aas_reversedlink_t *) ptr;
			ptr += sizeof(aas_reversedlink_t);
			//
			revlink->areanum = i;
			revlink->linknum = settings->firstreachablearea + n;
			revlink->next = aasworld.reversedreachability[reach->areanum].first;
			aasworld.reversedreachability[reach->areanum].first = revlink;
			aasworld.reversedreachability[reach->areanum].numlinks++;
		} //end for
	} //end for
#ifdef DEBUG
	botimport.Print(PRT_MESSAGE, "reversed reachability %d msec\n", Sys_MilliSeconds() - starttime);
#endif
} //end of the function AAS_CreateReversedReachability
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
unsigned short int AAS_AreaTravelTime(int areanum, vec3_t start, vec3_t end)
{
	int intdist;
	float dist;
	vec3_t dir;

	VectorSubtract(start, end, dir);
	dist = VectorLength(dir);
	//if crouch only area
	if (AAS_AreaCrouch(areanum)) dist *= DISTANCEFACTOR_CROUCH;
	//if swim area
	else if (AAS_AreaSwim(areanum)) dist *= DISTANCEFACTOR_SWIM;
	//normal walk area
	else dist *= DISTANCEFACTOR_WALK;
	//
	intdist = (int) dist;
	//make sure the distance isn't zero
	if (intdist <= 0) intdist = 1;
	return intdist;
} //end of the function AAS_AreaTravelTime
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_CalculateAreaTravelTimes(void)
{
	int i, l, n, size;
	char *ptr;
	vec3_t end;
	aas_reversedreachability_t *revreach;
	aas_reversedlink_t *revlink;
	aas_reachability_t *reach;
	aas_areasettings_t *settings;
	int starttime;

	starttime = Sys_MilliSeconds();
	//if there are still area travel times, free the memory
	if (aasworld.areatraveltimes) FreeMemory(aasworld.areatraveltimes);
	//get the total size of all the area travel times
	size = aasworld.numareas * sizeof(unsigned short **);
	for (i = 0; i < aasworld.numareas; i++)
	{
		revreach = &aasworld.reversedreachability[i];
		//settings of the area
		settings = &aasworld.areasettings[i];
		//
		size += settings->numreachableareas * sizeof(unsigned short *);
		//
		size += settings->numreachableareas * revreach->numlinks * sizeof(unsigned short);
	} //end for
	//allocate memory for the area travel times
	ptr = (char *) GetClearedMemory(size);
	aasworld.areatraveltimes = (unsigned short ***) ptr;
	ptr += aasworld.numareas * sizeof(unsigned short **);
	//calcluate the travel times for all the areas
	for (i = 0; i < aasworld.numareas; i++)
	{
		//reversed reachabilities of this area
		revreach = &aasworld.reversedreachability[i];
		//settings of the area
		settings = &aasworld.areasettings[i];
		//
		aasworld.areatraveltimes[i] = (unsigned short **) ptr;
		ptr += settings->numreachableareas * sizeof(unsigned short *);
		//
		for (l = 0; l < settings->numreachableareas; l++)
		{
			aasworld.areatraveltimes[i][l] = (unsigned short *) ptr;
			ptr += revreach->numlinks * sizeof(unsigned short);
			//reachability link
			reach = &aasworld.reachability[settings->firstreachablearea + l];
			//
			for (n = 0, revlink = revreach->first; revlink; revlink = revlink->next, n++)
			{
				VectorCopy(aasworld.reachability[revlink->linknum].end, end);
				//
				aasworld.areatraveltimes[i][l][n] = AAS_AreaTravelTime(i, end, reach->start);
			} //end for
		} //end for
	} //end for
#ifdef DEBUG
	botimport.Print(PRT_MESSAGE, "area travel times %d msec\n", Sys_MilliSeconds() - starttime);
#endif
} //end of the function AAS_CalculateAreaTravelTimes
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_PortalMaxTravelTime(int portalnum)
{
	int l, n, t, maxt;
	aas_portal_t *portal;
	aas_reversedreachability_t *revreach;
	aas_reversedlink_t *revlink;
	aas_areasettings_t *settings;

	portal = &aasworld.portals[portalnum];
	//reversed reachabilities of this portal area
	revreach = &aasworld.reversedreachability[portal->areanum];
	//settings of the portal area
	settings = &aasworld.areasettings[portal->areanum];
	//
	maxt = 0;
	for (l = 0; l < settings->numreachableareas; l++)
	{
		for (n = 0, revlink = revreach->first; revlink; revlink = revlink->next, n++)
		{
			t = aasworld.areatraveltimes[portal->areanum][l][n];
			if (t > maxt)
			{
				maxt = t;
			} //end if
		} //end for
	} //end for
	return maxt;
} //end of the function AAS_PortalMaxTravelTime
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_InitPortalMaxTravelTimes(void)
{
	int i;

	if (aasworld.portalmaxtraveltimes) FreeMemory(aasworld.portalmaxtraveltimes);

	aasworld.portalmaxtraveltimes = (int *) GetClearedMemory(aasworld.numportals * sizeof(int));

	for (i = 0; i < aasworld.numportals; i++)
	{
		aasworld.portalmaxtraveltimes[i] = AAS_PortalMaxTravelTime(i);
		//botimport.Print(PRT_MESSAGE, "portal %d max tt = %d\n", i, aasworld.portalmaxtraveltimes[i]);
	} //end for
} //end of the function AAS_InitPortalMaxTravelTimes
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
/*
int AAS_FreeOldestCache(void)
{
	int i, j, bestcluster, bestarea, freed;
	float besttime;
	aas_routingcache_t *cache, *bestcache;

	freed = qfalse;
	besttime = 999999999;
	bestcache = NULL;
	bestcluster = 0;
	bestarea = 0;
	//refresh cluster cache
	for (i = 0; i < aasworld.numclusters; i++)
	{
		for (j = 0; j < aasworld.clusters[i].numareas; j++)
		{
			for (cache = aasworld.clusterareacache[i][j]; cache; cache = cache->next)
			{
				//never remove cache leading towards a portal
				if (aasworld.areasettings[cache->areanum].cluster < 0) continue;
				//if this cache is older than the cache we found so far
				if (cache->time < besttime)
				{
					bestcache = cache;
					bestcluster = i;
					bestarea = j;
					besttime = cache->time;
				} //end if
			} //end for
		} //end for
	} //end for
	if (bestcache)
	{
		cache = bestcache;
		if (cache->prev) cache->prev->next = cache->next;
		else aasworld.clusterareacache[bestcluster][bestarea] = cache->next;
		if (cache->next) cache->next->prev = cache->prev;
		AAS_FreeRoutingCache(cache);
		freed = qtrue;
	} //end if
	besttime = 999999999;
	bestcache = NULL;
	bestarea = 0;
	for (i = 0; i < aasworld.numareas; i++)
	{
		//refresh portal cache
		for (cache = aasworld.portalcache[i]; cache; cache = cache->next)
		{
			if (cache->time < besttime)
			{
				bestcache = cache;
				bestarea = i;
				besttime = cache->time;
			} //end if
		} //end for
	} //end for
	if (bestcache)
	{
		cache = bestcache;
		if (cache->prev) cache->prev->next = cache->next;
		else aasworld.portalcache[bestarea] = cache->next;
		if (cache->next) cache->next->prev = cache->prev;
		AAS_FreeRoutingCache(cache);
		freed = qtrue;
	} //end if
	return freed;
} //end of the function AAS_FreeOldestCache
*/
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_FreeOldestCache(void)
{
	int clusterareanum;
	aas_routingcache_t *cache;

	for (cache = aasworld.oldestcache; cache; cache = cache->time_next) {
		// never free area cache leading towards a portal
		if (cache->type == CACHETYPE_AREA && aasworld.areasettings[cache->areanum].cluster < 0) {
			continue;
		}
		break;
	}
	if (cache) {
		// unlink the cache
		if (cache->type == CACHETYPE_AREA) {
			//number of the area in the cluster
			clusterareanum = AAS_ClusterAreaNum(cache->cluster, cache->areanum);
			// unlink from cluster area cache
			if (cache->prev) cache->prev->next = cache->next;
			else aasworld.clusterareacache[cache->cluster][clusterareanum] = cache->next;
			if (cache->next) cache->next->prev = cache->prev;
		}
		else {
			// unlink from portal cache
			if (cache->prev) cache->prev->next = cache->next;
			else aasworld.portalcache[cache->areanum] = cache->next;
			if (cache->next) cache->next->prev = cache->prev;
		}
		AAS_FreeRoutingCache(cache);
		return qtrue;
	}
	return qfalse;
} //end of the function AAS_FreeOldestCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
aas_routingcache_t *AAS_AllocRoutingCache(int numtraveltimes)
{
	aas_routingcache_t *cache;
	int size;

	//
	size = sizeof(aas_routingcache_t)
						+ numtraveltimes * sizeof(unsigned short int)
						+ numtraveltimes * sizeof(unsigned char);
	//
	routingcachesize += size;
	//
	cache = (aas_routingcache_t *) GetClearedMemory(size);
	cache->reachabilities = (unsigned char *) cache + sizeof(aas_routingcache_t)
								+ numtraveltimes * sizeof(unsigned short int);
	cache->size = size;
	return cache;
} //end of the function AAS_AllocRoutingCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_FreeAllClusterAreaCache(void)
{
	int i, j;
	aas_routingcache_t *cache, *nextcache;
	aas_cluster_t *cluster;

	//free all cluster cache if existing
	if (!aasworld.clusterareacache) return;
	//free caches
	for (i = 0; i < aasworld.numclusters; i++)
	{
		cluster = &aasworld.clusters[i];
		for (j = 0; j < cluster->numareas; j++)
		{
			for (cache = aasworld.clusterareacache[i][j]; cache; cache = nextcache)
			{
				nextcache = cache->next;
				AAS_FreeRoutingCache(cache);
			} //end for
			aasworld.clusterareacache[i][j] = NULL;
		} //end for
	} //end for
	//free the cluster cache array
	FreeMemory(aasworld.clusterareacache);
	aasworld.clusterareacache = NULL;
} //end of the function AAS_FreeAllClusterAreaCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_InitClusterAreaCache(void)
{
	int i, size;
	char *ptr;

	//
	for (size = 0, i = 0; i < aasworld.numclusters; i++)
	{
		size += aasworld.clusters[i].numareas;
	} //end for
	//two dimensional array with pointers for every cluster to routing cache
	//for every area in that cluster
	ptr = (char *) GetClearedMemory(
				aasworld.numclusters * sizeof(aas_routingcache_t **) +
				size * sizeof(aas_routingcache_t *));
	aasworld.clusterareacache = (aas_routingcache_t ***) ptr;
	ptr += aasworld.numclusters * sizeof(aas_routingcache_t **);
	for (i = 0; i < aasworld.numclusters; i++)
	{
		aasworld.clusterareacache[i] = (aas_routingcache_t **) ptr;
		ptr += aasworld.clusters[i].numareas * sizeof(aas_routingcache_t *);
	} //end for
} //end of the function AAS_InitClusterAreaCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_FreeAllPortalCache(void)
{
	int i;
	aas_routingcache_t *cache, *nextcache;

	//free all portal cache if existing
	if (!aasworld.portalcache) return;
	//free portal caches
	for (i = 0; i < aasworld.numareas; i++)
	{
		for (cache = aasworld.portalcache[i]; cache; cache = nextcache)
		{
			nextcache = cache->next;
			AAS_FreeRoutingCache(cache);
		} //end for
		aasworld.portalcache[i] = NULL;
	} //end for
	FreeMemory(aasworld.portalcache);
	aasworld.portalcache = NULL;
} //end of the function AAS_FreeAllPortalCache
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void AAS_InitPortalCache(void)
{
	//
	aasworld.portalcache = (aas_routingcache_t **) GetClearedMemory(
								aasworld.numareas * sizeof(aas_routingcache_t *));
} //end of the function AAS_InitPortalCache
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void AAS_InitRoutingUpdate(void)
{
	int i, maxreachabilityareas;

	//free routing update fields if already existing
	if (aasworld.areaupdate) FreeMemory(aasworld.areaupdate);
	//
	maxreachabilityareas = 0;
	for (i = 0; i < aasworld.numclusters; i++)
	{
		if (aasworld.clusters[i].numreachabilityareas > maxreachabilityareas)
		{
			maxreachabilityareas = aasworld.clusters[i].numreachabilityareas;
		} //end if
	} //end for
	//allocate memory for the routing update fields
	aasworld.areaupdate = (aas_routingupdate_t *) GetClearedMemory(
									maxreachabilityareas * sizeof(aas_routingupdate_t));
	//
	if (aasworld.portalupdate) FreeMemory(aasworld.portalupdate);
	//allocate memory for the portal update fields
	aasworld.portalupdate = (aas_routingupdate_t *) GetClearedMemory(
									(aasworld.numportals+1) * sizeof(aas_routingupdate_t));
} //end of the function AAS_InitRoutingUpdate
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_CreateAllRoutingCache(void)
{
	int i, j, t;

	aasworld.initialized = qtrue;
	botimport.Print(PRT_MESSAGE, "AAS_CreateAllRoutingCache\n");
	for (i = 1; i < aasworld.numareas; i++)
	{
		if (!AAS_AreaReachability(i)) continue;
		for (j = 1; j < aasworld.numareas; j++)
		{
			if (i == j) continue;
			if (!AAS_AreaReachability(j)) continue;
			t = AAS_AreaTravelTimeToGoalArea(i, aasworld.areas[i].center, j, TFL_DEFAULT);
			//Log_Write("traveltime from %d to %d is %d", i, j, t);
		} //end for
	} //end for
	aasworld.initialized = qfalse;
} //end of the function AAS_CreateAllRoutingCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================

//the route cache header
//this header is followed by numportalcache + numareacache aas_routingcache_t
//structures that store routing cache
typedef struct routecacheheader_s
{
	int ident;
	int version;
	int numareas;
	int numclusters;
	int areacrc;
	int clustercrc;
	int numportalcache;
	int numareacache;
} routecacheheader_t;

#define RCID						(('C'<<24)+('R'<<16)+('E'<<8)+'M')
#define RCVERSION					2

//void AAS_DecompressVis(byte *in, int numareas, byte *decompressed);
//int AAS_CompressVis(byte *vis, int numareas, byte *dest);

void AAS_WriteRouteCache(void)
{
	int i, j, numportalcache, numareacache, totalsize;
	aas_routingcache_t *cache;
	aas_cluster_t *cluster;
	fileHandle_t fp;
	char filename[MAX_QPATH];
	routecacheheader_t routecacheheader;

	numportalcache = 0;
	for (i = 0; i < aasworld.numareas; i++)
	{
		for (cache = aasworld.portalcache[i]; cache; cache = cache->next)
		{
			numportalcache++;
		} //end for
	} //end for
	numareacache = 0;
	for (i = 0; i < aasworld.numclusters; i++)
	{
		cluster = &aasworld.clusters[i];
		for (j = 0; j < cluster->numareas; j++)
		{
			for (cache = aasworld.clusterareacache[i][j]; cache; cache = cache->next)
			{
				numareacache++;
			} //end for
		} //end for
	} //end for
	// open the file for writing
	Com_sprintf(filename, MAX_QPATH, "maps/%s.rcd", aasworld.mapname);
	botimport.FS_FOpenFile( filename, &fp, FS_WRITE );
	if (!fp)
	{
		AAS_Error("Unable to open file: %s\n", filename);
		return;
	} //end if
	//create the header
	routecacheheader.ident = RCID;
	routecacheheader.version = RCVERSION;
	routecacheheader.numareas = aasworld.numareas;
	routecacheheader.numclusters = aasworld.numclusters;
	routecacheheader.areacrc = CRC_ProcessString( (unsigned char *)aasworld.areas, sizeof(aas_area_t) * aasworld.numareas );
	routecacheheader.clustercrc = CRC_ProcessString( (unsigned char *)aasworld.clusters, sizeof(aas_cluster_t) * aasworld.numclusters );
	routecacheheader.numportalcache = numportalcache;
	routecacheheader.numareacache = numareacache;
	//write the header
	botimport.FS_Write(&routecacheheader, sizeof(routecacheheader_t), fp);
	//
	totalsize = 0;
	//write all the cache
	for (i = 0; i < aasworld.numareas; i++)
	{
		for (cache = aasworld.portalcache[i]; cache; cache = cache->next)
		{
			botimport.FS_Write(cache, cache->size, fp);
			totalsize += cache->size;
		} //end for
	} //end for
	for (i = 0; i < aasworld.numclusters; i++)
	{
		cluster = &aasworld.clusters[i];
		for (j = 0; j < cluster->numareas; j++)
		{
			for (cache = aasworld.clusterareacache[i][j]; cache; cache = cache->next)
			{
				botimport.FS_Write(cache, cache->size, fp);
				totalsize += cache->size;
			} //end for
		} //end for
	} //end for
	// write the visareas
	/*
	for (i = 0; i < aasworld.numareas; i++)
	{
		if (!aasworld.areavisibility[i]) {
			size = 0;
			botimport.FS_Write(&size, sizeof(int), fp);
			continue;
		}
		AAS_DecompressVis( aasworld.areavisibility[i], aasworld.numareas, aasworld.decompressedvis );
		size = AAS_CompressVis( aasworld.decompressedvis, aasworld.numareas, aasworld.decompressedvis );
		botimport.FS_Write(&size, sizeof(int), fp);
		botimport.FS_Write(aasworld.decompressedvis, size, fp);
	}
	*/
	//
	botimport.FS_FCloseFile(fp);
	botimport.Print(PRT_MESSAGE, "\nroute cache written to %s\n", filename);
	botimport.Print(PRT_MESSAGE, "written %d bytes of routing cache\n", totalsize);
} //end of the function AAS_WriteRouteCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
aas_routingcache_t *AAS_ReadCache(fileHandle_t fp)
{
	int size;
	aas_routingcache_t *cache;

	botimport.FS_Read(&size, sizeof(size), fp);
	cache = (aas_routingcache_t *) GetMemory(size);
	cache->size = size;
	botimport.FS_Read((unsigned char *)cache + sizeof(size), size - sizeof(size), fp);
	cache->reachabilities = (unsigned char *) cache + sizeof(aas_routingcache_t) - sizeof(unsigned short) +
		(size - sizeof(aas_routingcache_t) + sizeof(unsigned short)) / 3 * 2;
	return cache;
} //end of the function AAS_ReadCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_ReadRouteCache(void)
{
	int i, clusterareanum;//, size;
	fileHandle_t fp;
	char filename[MAX_QPATH];
	routecacheheader_t routecacheheader;
	aas_routingcache_t *cache;

	Com_sprintf(filename, MAX_QPATH, "maps/%s.rcd", aasworld.mapname);
	botimport.FS_FOpenFile( filename, &fp, FS_READ );
	if (!fp)
	{
		return qfalse;
	} //end if
	botimport.FS_Read(&routecacheheader, sizeof(routecacheheader_t), fp );
	if (routecacheheader.ident != RCID)
	{
		AAS_Error("%s is not a route cache dump\n");
		return qfalse;
	} //end if
	if (routecacheheader.version != RCVERSION)
	{
		AAS_Error("route cache dump has wrong version %d, should be %d", routecacheheader.version, RCVERSION);
		return qfalse;
	} //end if
	if (routecacheheader.numareas != aasworld.numareas)
	{
		//AAS_Error("route cache dump has wrong number of areas\n");
		return qfalse;
	} //end if
	if (routecacheheader.numclusters != aasworld.numclusters)
	{
		//AAS_Error("route cache dump has wrong number of clusters\n");
		return qfalse;
	} //end if
	if (routecacheheader.areacrc !=
		CRC_ProcessString( (unsigned char *)aasworld.areas, sizeof(aas_area_t) * aasworld.numareas ))
	{
		//AAS_Error("route cache dump area CRC incorrect\n");
		return qfalse;
	} //end if
	if (routecacheheader.clustercrc !=
		CRC_ProcessString( (unsigned char *)aasworld.clusters, sizeof(aas_cluster_t) * aasworld.numclusters ))
	{
		//AAS_Error("route cache dump cluster CRC incorrect\n");
		return qfalse;
	} //end if
	//read all the portal cache
	for (i = 0; i < routecacheheader.numportalcache; i++)
	{
		cache = AAS_ReadCache(fp);
		cache->next = aasworld.portalcache[cache->areanum];
		cache->prev = NULL;
		if (aasworld.portalcache[cache->areanum])
			aasworld.portalcache[cache->areanum]->prev = cache;
		aasworld.portalcache[cache->areanum] = cache;
	} //end for
	//read all the cluster area cache
	for (i = 0; i < routecacheheader.numareacache; i++)
	{
		cache = AAS_ReadCache(fp);
		clusterareanum = AAS_ClusterAreaNum(cache->cluster, cache->areanum);
		cache->next = aasworld.clusterareacache[cache->cluster][clusterareanum];
		cache->prev = NULL;
		if (aasworld.clusterareacache[cache->cluster][clusterareanum])
			aasworld.clusterareacache[cache->cluster][clusterareanum]->prev = cache;
		aasworld.clusterareacache[cache->cluster][clusterareanum] = cache;
	} //end for
	// read the visareas
	/*
	aasworld.areavisibility = (byte **) GetClearedMemory(aasworld.numareas * sizeof(byte *));
	aasworld.decompressedvis = (byte *) GetClearedMemory(aasworld.numareas * sizeof(byte));
	for (i = 0; i < aasworld.numareas; i++)
	{
		botimport.FS_Read(&size, sizeof(size), fp );
		if (size) {
			aasworld.areavisibility[i] = (byte *) GetMemory(size);
			botimport.FS_Read(aasworld.areavisibility[i], size, fp );
		}
	}
	*/
	//
	botimport.FS_FCloseFile(fp);
	return qtrue;
} //end of the function AAS_ReadRouteCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
#define MAX_REACHABILITYPASSAREAS		32

void AAS_InitReachabilityAreas(void)
{
	int i, j, numareas, areas[MAX_REACHABILITYPASSAREAS];
	int numreachareas;
	aas_reachability_t *reach;
	vec3_t start, end;

	if (aasworld.reachabilityareas)
		FreeMemory(aasworld.reachabilityareas);
	if (aasworld.reachabilityareaindex)
		FreeMemory(aasworld.reachabilityareaindex);

	aasworld.reachabilityareas = (aas_reachabilityareas_t *)
				GetClearedMemory(aasworld.reachabilitysize * sizeof(aas_reachabilityareas_t));
	aasworld.reachabilityareaindex = (int *)
				GetClearedMemory(aasworld.reachabilitysize * MAX_REACHABILITYPASSAREAS * sizeof(int));
	numreachareas = 0;
	for (i = 0; i < aasworld.reachabilitysize; i++)
	{
		reach = &aasworld.reachability[i];
		numareas = 0;
		switch(reach->traveltype & TRAVELTYPE_MASK)
		{
			//trace areas from start to end
			case TRAVEL_BARRIERJUMP:
			case TRAVEL_WATERJUMP:
				VectorCopy(reach->start, end);
				end[2] = reach->end[2];
				numareas = AAS_TraceAreas(reach->start, end, areas, NULL, MAX_REACHABILITYPASSAREAS);
				break;
			case TRAVEL_WALKOFFLEDGE:
				VectorCopy(reach->end, start);
				start[2] = reach->start[2];
				numareas = AAS_TraceAreas(start, reach->end, areas, NULL, MAX_REACHABILITYPASSAREAS);
				break;
			case TRAVEL_GRAPPLEHOOK:
				numareas = AAS_TraceAreas(reach->start, reach->end, areas, NULL, MAX_REACHABILITYPASSAREAS);
				break;

			//trace arch
			case TRAVEL_JUMP: break;
			case TRAVEL_ROCKETJUMP: break;
			case TRAVEL_BFGJUMP: break;
			case TRAVEL_JUMPPAD: break;

			//trace from reach->start to entity center, along entity movement
			//and from entity center to reach->end
			case TRAVEL_ELEVATOR: break;
			case TRAVEL_FUNCBOB: break;

			//no areas in between
			case TRAVEL_WALK: break;
			case TRAVEL_CROUCH: break;
			case TRAVEL_LADDER: break;
			case TRAVEL_SWIM: break;
			case TRAVEL_TELEPORT: break;
			default: break;
		} //end switch
		aasworld.reachabilityareas[i].firstarea = numreachareas;
		aasworld.reachabilityareas[i].numareas = numareas;
		for (j = 0; j < numareas; j++)
		{
			aasworld.reachabilityareaindex[numreachareas++] = areas[j];
		} //end for
	} //end for
} //end of the function AAS_InitReachabilityAreas
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_InitRouting(void)
{
	AAS_InitTravelFlagFromType();
	//
	AAS_InitAreaContentsTravelFlags();
	//initialize the routing update fields
	AAS_InitRoutingUpdate();
	//create reversed reachability links used by the routing update algorithm
	AAS_CreateReversedReachability();
	//initialize the cluster cache
	AAS_InitClusterAreaCache();
	//initialize portal cache
	AAS_InitPortalCache();
	//initialize the area travel times
	AAS_CalculateAreaTravelTimes();
	//calculate the maximum travel times through portals
	AAS_InitPortalMaxTravelTimes();
	//get the areas reachabilities go through
	AAS_InitReachabilityAreas();
	//
#ifdef ROUTING_DEBUG
	numareacacheupdates = 0;
	numportalcacheupdates = 0;
#endif //ROUTING_DEBUG
	//
	routingcachesize = 0;
	max_routingcachesize = 1024 * (int) LibVarValue("max_routingcache", "4096");
	// read any routing cache if available
	AAS_ReadRouteCache();
} //end of the function AAS_InitRouting
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_FreeRoutingCaches(void)
{
	// free all the existing cluster area cache
	AAS_FreeAllClusterAreaCache();
	// free all the existing portal cache
	AAS_FreeAllPortalCache();
	// free cached travel times within areas
	if (aasworld.areatraveltimes) FreeMemory(aasworld.areatraveltimes);
	aasworld.areatraveltimes = NULL;
	// free cached maximum travel time through cluster portals
	if (aasworld.portalmaxtraveltimes) FreeMemory(aasworld.portalmaxtraveltimes);
	aasworld.portalmaxtraveltimes = NULL;
	// free reversed reachability links
	if (aasworld.reversedreachability) FreeMemory(aasworld.reversedreachability);
	aasworld.reversedreachability = NULL;
	// free routing algorithm memory
	if (aasworld.areaupdate) FreeMemory(aasworld.areaupdate);
	aasworld.areaupdate = NULL;
	if (aasworld.portalupdate) FreeMemory(aasworld.portalupdate);
	aasworld.portalupdate = NULL;
	// free lists with areas the reachabilities go through
	if (aasworld.reachabilityareas) FreeMemory(aasworld.reachabilityareas);
	aasworld.reachabilityareas = NULL;
	// free the reachability area index
	if (aasworld.reachabilityareaindex) FreeMemory(aasworld.reachabilityareaindex);
	aasworld.reachabilityareaindex = NULL;
	// free area contents travel flags look up table
	if (aasworld.areacontentstravelflags) FreeMemory(aasworld.areacontentstravelflags);
	aasworld.areacontentstravelflags = NULL;
} //end of the function AAS_FreeRoutingCaches
//===========================================================================
// update the given routing cache
//
// Parameter:			areacache		: routing cache to update
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_UpdateAreaRoutingCache(aas_routingcache_t *areacache)
{
	int i, nextareanum, cluster, badtravelflags, clusterareanum, linknum;
	int numreachabilityareas;
	unsigned short int t, startareatraveltimes[128]; //NOTE: not more than 128 reachabilities per area allowed
	aas_routingupdate_t *updateliststart, *updatelistend, *curupdate, *nextupdate;
	aas_reachability_t *reach;
	aas_reversedreachability_t *revreach;
	aas_reversedlink_t *revlink;

#ifdef ROUTING_DEBUG
	numareacacheupdates++;
#endif //ROUTING_DEBUG
	//number of reachability areas within this cluster
	numreachabilityareas = aasworld.clusters[areacache->cluster].numreachabilityareas;
	//
	aasworld.frameroutingupdates++;
	//clear the routing update fields
//	Com_Memset(aasworld.areaupdate, 0, aasworld.numareas * sizeof(aas_routingupdate_t));
	//
	badtravelflags = ~areacache->travelflags;
	//
	clusterareanum = AAS_ClusterAreaNum(areacache->cluster, areacache->areanum);
	if (clusterareanum >= numreachabilityareas) return;
	//
	Com_Memset(startareatraveltimes, 0, sizeof(startareatraveltimes));
	//
	curupdate = &aasworld.areaupdate[clusterareanum];
	curupdate->areanum = areacache->areanum;
	//VectorCopy(areacache->origin, curupdate->start);
	curupdate->areatraveltimes = startareatraveltimes;
	curupdate->tmptraveltime = areacache->starttraveltime;
	//
	areacache->traveltimes[clusterareanum] = areacache->starttraveltime;
	//put the area to start with in the current read list
	curupdate->next = NULL;
	curupdate->prev = NULL;
	updateliststart = curupdate;
	updatelistend = curupdate;
	//while there are updates in the current list
	while (updateliststart)
	{
		curupdate = updateliststart;
		//
		if (curupdate->next) curupdate->next->prev = NULL;
		else updatelistend = NULL;
		updateliststart = curupdate->next;
		//
		curupdate->inlist = qfalse;
		//check all reversed reachability links
		revreach = &aasworld.reversedreachability[curupdate->areanum];
		//
		for (i = 0, revlink = revreach->first; revlink; revlink = revlink->next, i++)
		{
			linknum = revlink->linknum;
			reach = &aasworld.reachability[linknum];
			//if there is used an undesired travel type
			if (AAS_TravelFlagForType_inline(reach->traveltype) & badtravelflags) continue;
			//if not allowed to enter the next area
			if (aasworld.areasettings[reach->areanum].areaflags & AREA_DISABLED) continue;
			//if the next area has a not allowed travel flag
			if (AAS_AreaContentsTravelFlags_inline(reach->areanum) & badtravelflags) continue;
			//number of the area the reversed reachability leads to
			nextareanum = revlink->areanum;
			//get the cluster number of the area
			cluster = aasworld.areasettings[nextareanum].cluster;
			//don't leave the cluster
			if (cluster > 0 && cluster != areacache->cluster) continue;
			//get the number of the area in the cluster
			clusterareanum = AAS_ClusterAreaNum(areacache->cluster, nextareanum);
			if (clusterareanum >= numreachabilityareas) continue;
			//time already travelled plus the traveltime through
			//the current area plus the travel time from the reachability
			t = curupdate->tmptraveltime +
						//AAS_AreaTravelTime(curupdate->areanum, curupdate->start, reach->end) +
						curupdate->areatraveltimes[i] +
							reach->traveltime;
			//
			if (!areacache->traveltimes[clusterareanum] ||
					areacache->traveltimes[clusterareanum] > t)
			{
				areacache->traveltimes[clusterareanum] = t;
				areacache->reachabilities[clusterareanum] = linknum - aasworld.areasettings[nextareanum].firstreachablearea;
				nextupdate = &aasworld.areaupdate[clusterareanum];
				nextupdate->areanum = nextareanum;
				nextupdate->tmptraveltime = t;
				//VectorCopy(reach->start, nextupdate->start);
				nextupdate->areatraveltimes = aasworld.areatraveltimes[nextareanum][linknum -
													aasworld.areasettings[nextareanum].firstreachablearea];
				if (!nextupdate->inlist)
				{
					// we add the update to the end of the list
					// we could also use a B+ tree to have a real sorted list
					// on travel time which makes for faster routing updates
					nextupdate->next = NULL;
					nextupdate->prev = updatelistend;
					if (updatelistend) updatelistend->next = nextupdate;
					else updateliststart = nextupdate;
					updatelistend = nextupdate;
					nextupdate->inlist = qtrue;
				} //end if
			} //end if
		} //end for
	} //end while
} //end of the function AAS_UpdateAreaRoutingCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
aas_routingcache_t *AAS_GetAreaRoutingCache(int clusternum, int areanum, int travelflags)
{
	int clusterareanum;
	aas_routingcache_t *cache, *clustercache;

	//number of the area in the cluster
	clusterareanum = AAS_ClusterAreaNum(clusternum, areanum);
	//pointer to the cache for the area in the cluster
	clustercache = aasworld.clusterareacache[clusternum][clusterareanum];
	//find the cache without undesired travel flags
	for (cache = clustercache; cache; cache = cache->next)
	{
		//if there aren't used any undesired travel types for the cache
		if (cache->travelflags == travelflags) break;
	} //end for
	//if there was no cache
	if (!cache)
	{
		cache = AAS_AllocRoutingCache(aasworld.clusters[clusternum].numreachabilityareas);
		cache->cluster = clusternum;
		cache->areanum = areanum;
		VectorCopy(aasworld.areas[areanum].center, cache->origin);
		cache->starttraveltime = 1;
		cache->travelflags = travelflags;
		cache->prev = NULL;
		cache->next = clustercache;
		if (clustercache) clustercache->prev = cache;
		aasworld.clusterareacache[clusternum][clusterareanum] = cache;
		AAS_UpdateAreaRoutingCache(cache);
	} //end if
	else
	{
		AAS_UnlinkCache(cache);
	} //end else
	//the cache has been accessed
	cache->time = AAS_RoutingTime();
	cache->type = CACHETYPE_AREA;
	AAS_LinkCache(cache);
	return cache;
} //end of the function AAS_GetAreaRoutingCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_UpdatePortalRoutingCache(aas_routingcache_t *portalcache)
{
	int i, portalnum, clusterareanum, clusternum;
	unsigned short int t;
	aas_portal_t *portal;
	aas_cluster_t *cluster;
	aas_routingcache_t *cache;
	aas_routingupdate_t *updateliststart, *updatelistend, *curupdate, *nextupdate;

#ifdef ROUTING_DEBUG
	numportalcacheupdates++;
#endif //ROUTING_DEBUG
	//clear the routing update fields
//	Com_Memset(aasworld.portalupdate, 0, (aasworld.numportals+1) * sizeof(aas_routingupdate_t));
	//
	curupdate = &aasworld.portalupdate[aasworld.numportals];
	curupdate->cluster = portalcache->cluster;
	curupdate->areanum = portalcache->areanum;
	curupdate->tmptraveltime = portalcache->starttraveltime;
	//if the start area is a cluster portal, store the travel time for that portal
	clusternum = aasworld.areasettings[portalcache->areanum].cluster;
	if (clusternum < 0)
	{
		portalcache->traveltimes[-clusternum] = portalcache->starttraveltime;
	} //end if
	//put the area to start with in the current read list
	curupdate->next = NULL;
	curupdate->prev = NULL;
	updateliststart = curupdate;
	updatelistend = curupdate;
	//while there are updates in the current list
	while (updateliststart)
	{
		curupdate = updateliststart;
		//remove the current update from the list
		if (curupdate->next) curupdate->next->prev = NULL;
		else updatelistend = NULL;
		updateliststart = curupdate->next;
		//current update is removed from the list
		curupdate->inlist = qfalse;
		//
		cluster = &aasworld.clusters[curupdate->cluster];
		//
		cache = AAS_GetAreaRoutingCache(curupdate->cluster,
								curupdate->areanum, portalcache->travelflags);
		//take all portals of the cluster
		for (i = 0; i < cluster->numportals; i++)
		{
			portalnum = aasworld.portalindex[cluster->firstportal + i];
			portal = &aasworld.portals[portalnum];
			//if this is the portal of the current update continue
			if (portal->areanum == curupdate->areanum) continue;
			//
			clusterareanum = AAS_ClusterAreaNum(curupdate->cluster, portal->areanum);
			if (clusterareanum >= cluster->numreachabilityareas) continue;
			//
			t = cache->traveltimes[clusterareanum];
			if (!t) continue;
			t += curupdate->tmptraveltime;
			//
			if (!portalcache->traveltimes[portalnum] ||
					portalcache->traveltimes[portalnum] > t)
			{
				portalcache->traveltimes[portalnum] = t;
				nextupdate = &aasworld.portalupdate[portalnum];
				if (portal->frontcluster == curupdate->cluster)
				{
					nextupdate->cluster = portal->backcluster;
				} //end if
				else
				{
					nextupdate->cluster = portal->frontcluster;
				} //end else
				nextupdate->areanum = portal->areanum;
				//add travel time through the actual portal area for the next update
				nextupdate->tmptraveltime = t + aasworld.portalmaxtraveltimes[portalnum];
				if (!nextupdate->inlist)
				{
					// we add the update to the end of the list
					// we could also use a B+ tree to have a real sorted list
					// on travel time which makes for faster routing updates
					nextupdate->next = NULL;
					nextupdate->prev = updatelistend;
					if (updatelistend) updatelistend->next = nextupdate;
					else updateliststart = nextupdate;
					updatelistend = nextupdate;
					nextupdate->inlist = qtrue;
				} //end if
			} //end if
		} //end for
	} //end while
} //end of the function AAS_UpdatePortalRoutingCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
aas_routingcache_t *AAS_GetPortalRoutingCache(int clusternum, int areanum, int travelflags)
{
	aas_routingcache_t *cache;

	//find the cached portal routing if existing
	for (cache = aasworld.portalcache[areanum]; cache; cache = cache->next)
	{
		if (cache->travelflags == travelflags) break;
	} //end for
	//if the portal routing isn't cached
	if (!cache)
	{
		cache = AAS_AllocRoutingCache(aasworld.numportals);
		cache->cluster = clusternum;
		cache->areanum = areanum;
		VectorCopy(aasworld.areas[areanum].center, cache->origin);
		cache->starttraveltime = 1;
		cache->travelflags = travelflags;
		//add the cache to the cache list
		cache->prev = NULL;
		cache->next = aasworld.portalcache[areanum];
		if (aasworld.portalcache[areanum]) aasworld.portalcache[areanum]->prev = cache;
		aasworld.portalcache[areanum] = cache;
		//update the cache
		AAS_UpdatePortalRoutingCache(cache);
	} //end if
	else
	{
		AAS_UnlinkCache(cache);
	} //end else
	//the cache has been accessed
	cache->time = AAS_RoutingTime();
	cache->type = CACHETYPE_PORTAL;
	AAS_LinkCache(cache);
	return cache;
} //end of the function AAS_GetPortalRoutingCache
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_AreaRouteToGoalArea(int areanum, vec3_t origin, int goalareanum, int travelflags, int *traveltime, int *reachnum)
{
	int clusternum, goalclusternum, portalnum, i, clusterareanum, bestreachnum;
	unsigned short int t, besttime;
	aas_portal_t *portal;
	aas_cluster_t *cluster;
	aas_routingcache_t *areacache, *portalcache;
	aas_reachability_t *reach;

	if (!aasworld.initialized) return qfalse;

	if (areanum == goalareanum)
	{
		*traveltime = 1;
		*reachnum = 0;
		return qtrue;
	}
	//
	if (areanum <= 0 || areanum >= aasworld.numareas)
	{
		if (bot_developer)
		{
			botimport.Print(PRT_ERROR, "AAS_AreaTravelTimeToGoalArea: areanum %d out of range\n", areanum);
		} //end if
		return qfalse;
	} //end if
	if (goalareanum <= 0 || goalareanum >= aasworld.numareas)
	{
		if (bot_developer)
		{
			botimport.Print(PRT_ERROR, "AAS_AreaTravelTimeToGoalArea: goalareanum %d out of range\n", goalareanum);
		} //end if
		return qfalse;
	} //end if
	// make sure the routing cache doesn't grow to large
	while(AvailableMemory() < 1 * 1024 * 1024) {
		if (!AAS_FreeOldestCache()) break;
	}
	//
	if (AAS_AreaDoNotEnter(areanum) || AAS_AreaDoNotEnter(goalareanum))
	{
		travelflags |= TFL_DONOTENTER;
	} //end if
	//NOTE: the number of routing updates is limited per frame
	/*
	if (aasworld.frameroutingupdates > MAX_FRAMEROUTINGUPDATES)
	{
#ifdef DEBUG
		//Log_Write("WARNING: AAS_AreaTravelTimeToGoalArea: frame routing updates overflowed");
#endif
		return 0;
	} //end if
	*/
	//
	clusternum = aasworld.areasettings[areanum].cluster;
	goalclusternum = aasworld.areasettings[goalareanum].cluster;
	//check if the area is a portal of the goal area cluster
	if (clusternum < 0 && goalclusternum > 0)
	{
		portal = &aasworld.portals[-clusternum];
		if (portal->frontcluster == goalclusternum ||
				portal->backcluster == goalclusternum)
		{
			clusternum = goalclusternum;
		} //end if
	} //end if
	//check if the goalarea is a portal of the area cluster
	else if (clusternum > 0 && goalclusternum < 0)
	{
		portal = &aasworld.portals[-goalclusternum];
		if (portal->frontcluster == clusternum ||
				portal->backcluster == clusternum)
		{
			goalclusternum = clusternum;
		} //end if
	} //end if
	//if both areas are in the same cluster
	//NOTE: there might be a shorter route via another cluster!!! but we don't care
	if (clusternum > 0 && goalclusternum > 0 && clusternum == goalclusternum)
	{
		//
		areacache = AAS_GetAreaRoutingCache(clusternum, goalareanum, travelflags);
		//the number of the area in the cluster
		clusterareanum = AAS_ClusterAreaNum(clusternum, areanum);
		//the cluster the area is in
		cluster = &aasworld.clusters[clusternum];
		//if the area is NOT a reachability area
		if (clusterareanum >= cluster->numreachabilityareas) return 0;
		//if it is possible to travel to the goal area through this cluster
		if (areacache->traveltimes[clusterareanum] != 0)
		{
			*reachnum = aasworld.areasettings[areanum].firstreachablearea +
							areacache->reachabilities[clusterareanum];
			if (!origin) {
				*traveltime = areacache->traveltimes[clusterareanum];
				return qtrue;
			}
			reach = &aasworld.reachability[*reachnum];
			*traveltime = areacache->traveltimes[clusterareanum] +
							AAS_AreaTravelTime(areanum, origin, reach->start);
			//
			return qtrue;
		} //end if
	} //end if
	//
	clusternum = aasworld.areasettings[areanum].cluster;
	goalclusternum = aasworld.areasettings[goalareanum].cluster;
	//if the goal area is a portal
	if (goalclusternum < 0)
	{
		//just assume the goal area is part of the front cluster
		portal = &aasworld.portals[-goalclusternum];
		goalclusternum = portal->frontcluster;
	} //end if
	//get the portal routing cache
	portalcache = AAS_GetPortalRoutingCache(goalclusternum, goalareanum, travelflags);
	//if the area is a cluster portal, read directly from the portal cache
	if (clusternum < 0)
	{
		*traveltime = portalcache->traveltimes[-clusternum];
		*reachnum = aasworld.areasettings[areanum].firstreachablearea +
						portalcache->reachabilities[-clusternum];
		return qtrue;
	} //end if
	//
	besttime = 0;
	bestreachnum = -1;
	//the cluster the area is in
	cluster = &aasworld.clusters[clusternum];
	//find the portal of the area cluster leading towards the goal area
	for (i = 0; i < cluster->numportals; i++)
	{
		portalnum = aasworld.portalindex[cluster->firstportal + i];
		//if the goal area isn't reachable from the portal
		if (!portalcache->traveltimes[portalnum]) continue;
		//
		portal = &aasworld.portals[portalnum];
		//get the cache of the portal area
		areacache = AAS_GetAreaRoutingCache(clusternum, portal->areanum, travelflags);
		//current area inside the current cluster
		clusterareanum = AAS_ClusterAreaNum(clusternum, areanum);
		//if the area is NOT a reachability area
		if (clusterareanum >= cluster->numreachabilityareas) continue;
		//if the portal is NOT reachable from this area
		if (!areacache->traveltimes[clusterareanum]) continue;
		//total travel time is the travel time the portal area is from
		//the goal area plus the travel time towards the portal area
		t = portalcache->traveltimes[portalnum] + areacache->traveltimes[clusterareanum];
		//FIXME: add the exact travel time through the actual portal area
		//NOTE: for now we just add the largest travel time through the portal area
		//		because we can't directly calculate the exact travel time
		//		to be more specific we don't know which reachability was used to travel
		//		into the portal area
		t += aasworld.portalmaxtraveltimes[portalnum];
		//
		if (origin)
		{
			*reachnum = aasworld.areasettings[areanum].firstreachablearea +
							areacache->reachabilities[clusterareanum];
			reach = aasworld.reachability + *reachnum;
			t += AAS_AreaTravelTime(areanum, origin, reach->start);
		} //end if
		//if the time is better than the one already found
		if (!besttime || t < besttime)
		{
			bestreachnum = *reachnum;
			besttime = t;
		} //end if
	} //end for
	if (bestreachnum < 0) {
		return qfalse;
	}
	*reachnum = bestreachnum;
	*traveltime = besttime;
	return qtrue;
} //end of the function AAS_AreaRouteToGoalArea
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_AreaTravelTimeToGoalArea(int areanum, vec3_t origin, int goalareanum, int travelflags)
{
	int traveltime, reachnum;

	if (AAS_AreaRouteToGoalArea(areanum, origin, goalareanum, travelflags, &traveltime, &reachnum))
	{
		return traveltime;
	}
	return 0;
} //end of the function AAS_AreaTravelTimeToGoalArea
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_AreaReachabilityToGoalArea(int areanum, vec3_t origin, int goalareanum, int travelflags)
{
	int traveltime, reachnum;

	if (AAS_AreaRouteToGoalArea(areanum, origin, goalareanum, travelflags, &traveltime, &reachnum))
	{
		return reachnum;
	}
	return 0;
} //end of the function AAS_AreaReachabilityToGoalArea
//===========================================================================
// predict the route and stop on one of the stop events
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_PredictRoute(struct aas_predictroute_s *route, int areanum, vec3_t origin,
							int goalareanum, int travelflags, int maxareas, int maxtime,
							int stopevent, int stopcontents, int stoptfl, int stopareanum)
{
	int curareanum, reachnum, i, j, testareanum;
	vec3_t curorigin;
	aas_reachability_t *reach;
	aas_reachabilityareas_t *reachareas;

	//init output
	route->stopevent = RSE_NONE;
	route->endarea = goalareanum;
	route->endcontents = 0;
	route->endtravelflags = 0;
	VectorCopy(origin, route->endpos);
	route->time = 0;

	curareanum = areanum;
	VectorCopy(origin, curorigin);

	for (i = 0; curareanum != goalareanum && (!maxareas || i < maxareas) && i < aasworld.numareas; i++)
	{
		reachnum = AAS_AreaReachabilityToGoalArea(curareanum, curorigin, goalareanum, travelflags);
		if (!reachnum)
		{
			route->stopevent = RSE_NOROUTE;
			return qfalse;
		} //end if
		reach = &aasworld.reachability[reachnum];
		//
		if (stopevent & RSE_USETRAVELTYPE)
		{
			if (AAS_TravelFlagForType_inline(reach->traveltype) & stoptfl)
			{
				route->stopevent = RSE_USETRAVELTYPE;
				route->endarea = curareanum;
				route->endcontents = aasworld.areasettings[curareanum].contents;
				route->endtravelflags = AAS_TravelFlagForType_inline(reach->traveltype);
				VectorCopy(reach->start, route->endpos);
				return qtrue;
			} //end if
			if (AAS_AreaContentsTravelFlags_inline(reach->areanum) & stoptfl)
			{
				route->stopevent = RSE_USETRAVELTYPE;
				route->endarea = reach->areanum;
				route->endcontents = aasworld.areasettings[reach->areanum].contents;
				route->endtravelflags = AAS_AreaContentsTravelFlags_inline(reach->areanum);
				VectorCopy(reach->end, route->endpos);
				route->time += AAS_AreaTravelTime(areanum, origin, reach->start);
				route->time += reach->traveltime;
				return qtrue;
			} //end if
		} //end if
		reachareas = &aasworld.reachabilityareas[reachnum];
		for (j = 0; j < reachareas->numareas + 1; j++)
		{
			if (j >= reachareas->numareas)
				testareanum = reach->areanum;
			else
				testareanum = aasworld.reachabilityareaindex[reachareas->firstarea + j];
			if (stopevent & RSE_ENTERCONTENTS)
			{
				if (aasworld.areasettings[testareanum].contents & stopcontents)
				{
					route->stopevent = RSE_ENTERCONTENTS;
					route->endarea = testareanum;
					route->endcontents = aasworld.areasettings[testareanum].contents;
					VectorCopy(reach->end, route->endpos);
					route->time += AAS_AreaTravelTime(areanum, origin, reach->start);
					route->time += reach->traveltime;
					return qtrue;
				} //end if
			} //end if
			if (stopevent & RSE_ENTERAREA)
			{
				if (testareanum == stopareanum)
				{
					route->stopevent = RSE_ENTERAREA;
					route->endarea = testareanum;
					route->endcontents = aasworld.areasettings[testareanum].contents;
					VectorCopy(reach->start, route->endpos);
					return qtrue;
				} //end if
			} //end if
		} //end for

		route->time += AAS_AreaTravelTime(areanum, origin, reach->start);
		route->time += reach->traveltime;
		route->endarea = reach->areanum;
		route->endcontents = aasworld.areasettings[reach->areanum].contents;
		route->endtravelflags = AAS_TravelFlagForType_inline(reach->traveltype);
		VectorCopy(reach->end, route->endpos);
		//
		curareanum = reach->areanum;
		VectorCopy(reach->end, curorigin);
		//
		if (maxtime && route->time > maxtime)
			break;
	} //end while
	if (curareanum != goalareanum)
		return qfalse;
	return qtrue;
} //end of the function AAS_PredictRoute
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_BridgeWalkable(int areanum)
{
	return qfalse;
} //end of the function AAS_BridgeWalkable
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void AAS_ReachabilityFromNum(int num, struct aas_reachability_s *reach)
{
	if (!aasworld.initialized)
	{
		Com_Memset(reach, 0, sizeof(aas_reachability_t));
		return;
	} //end if
	if (num < 0 || num >= aasworld.reachabilitysize)
	{
		Com_Memset(reach, 0, sizeof(aas_reachability_t));
		return;
	} //end if
	Com_Memcpy(reach, &aasworld.reachability[num], sizeof(aas_reachability_t));;
} //end of the function AAS_ReachabilityFromNum
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_NextAreaReachability(int areanum, int reachnum)
{
	aas_areasettings_t *settings;

	if (!aasworld.initialized) return 0;

	if (areanum <= 0 || areanum >= aasworld.numareas)
	{
		botimport.Print(PRT_ERROR, "AAS_NextAreaReachability: areanum %d out of range\n", areanum);
		return 0;
	} //end if

	settings = &aasworld.areasettings[areanum];
	if (!reachnum)
	{
		return settings->firstreachablearea;
	} //end if
	if (reachnum < settings->firstreachablearea)
	{
		botimport.Print(PRT_FATAL, "AAS_NextAreaReachability: reachnum < settings->firstreachableara");
		return 0;
	} //end if
	reachnum++;
	if (reachnum >= settings->firstreachablearea + settings->numreachableareas)
	{
		return 0;
	} //end if
	return reachnum;
} //end of the function AAS_NextAreaReachability
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_NextModelReachability(int num, int modelnum)
{
	int i;

	if (num <= 0) num = 1;
	else if (num >= aasworld.reachabilitysize) return 0;
	else num++;
	//
	for (i = num; i < aasworld.reachabilitysize; i++)
	{
		if ((aasworld.reachability[i].traveltype & TRAVELTYPE_MASK) == TRAVEL_ELEVATOR)
		{
			if (aasworld.reachability[i].facenum == modelnum) return i;
		} //end if
		else if ((aasworld.reachability[i].traveltype & TRAVELTYPE_MASK) == TRAVEL_FUNCBOB)
		{
			if ((aasworld.reachability[i].facenum & 0x0000FFFF) == modelnum) return i;
		} //end if
	} //end for
	return 0;
} //end of the function AAS_NextModelReachability
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_RandomGoalArea(int areanum, int travelflags, int *goalareanum, vec3_t goalorigin)
{
	int i, n, t;
	vec3_t start, end;
	aas_trace_t trace;

	//if the area has no reachabilities
	if (!AAS_AreaReachability(areanum)) return qfalse;
	//
	n = aasworld.numareas * random();
	for (i = 0; i < aasworld.numareas; i++)
	{
		if (n <= 0) n = 1;
		if (n >= aasworld.numareas) n = 1;
		if (AAS_AreaReachability(n))
		{
			t = AAS_AreaTravelTimeToGoalArea(areanum, aasworld.areas[areanum].center, n, travelflags);
			//if the goal is reachable
			if (t > 0)
			{
				if (AAS_AreaSwim(n))
				{
					*goalareanum = n;
					VectorCopy(aasworld.areas[n].center, goalorigin);
					//botimport.Print(PRT_MESSAGE, "found random goal area %d\n", *goalareanum);
					return qtrue;
				} //end if
				VectorCopy(aasworld.areas[n].center, start);
				if (!AAS_PointAreaNum(start))
					Log_Write("area %d center %f %f %f in solid?", n, start[0], start[1], start[2]);
				VectorCopy(start, end);
				end[2] -= 300;
				trace = AAS_TraceClientBBox(start, end, PRESENCE_CROUCH, -1);
				if (!trace.startsolid && trace.fraction < 1 && AAS_PointAreaNum(trace.endpos) == n)
				{
					if (AAS_AreaGroundFaceArea(n) > 300)
					{
						*goalareanum = n;
						VectorCopy(trace.endpos, goalorigin);
						//botimport.Print(PRT_MESSAGE, "found random goal area %d\n", *goalareanum);
						return qtrue;
					} //end if
				} //end if
			} //end if
		} //end if
		n++;
	} //end for
	return qfalse;
} //end of the function AAS_RandomGoalArea
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_AreaVisible(int srcarea, int destarea)
{
	return qfalse;
} //end of the function AAS_AreaVisible
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
float DistancePointToLine(vec3_t v1, vec3_t v2, vec3_t point)
{
	vec3_t vec, p2;

	AAS_ProjectPointOntoVector(point, v1, v2, p2);
	VectorSubtract(point, p2, vec);
	return VectorLength(vec);
} //end of the function DistancePointToLine
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int AAS_NearestHideArea(int srcnum, vec3_t origin, int areanum, int enemynum, vec3_t enemyorigin, int enemyareanum, int travelflags)
{
	int i, j, nextareanum, badtravelflags, numreach, bestarea;
	unsigned short int t, besttraveltime;
	static unsigned short int *hidetraveltimes;
	aas_routingupdate_t *updateliststart, *updatelistend, *curupdate, *nextupdate;
	aas_reachability_t *reach;
	float dist1, dist2;
	vec3_t v1, v2, p;
	qboolean startVisible;

	//
	if (!hidetraveltimes)
	{
		hidetraveltimes = (unsigned short int *) GetClearedMemory(aasworld.numareas * sizeof(unsigned short int));
	} //end if
	else
	{
		Com_Memset(hidetraveltimes, 0, aasworld.numareas * sizeof(unsigned short int));
	} //end else
	besttraveltime = 0;
	bestarea = 0;
	//assume visible
	startVisible = qtrue;
	//
	badtravelflags = ~travelflags;
	//
	curupdate = &aasworld.areaupdate[areanum];
	curupdate->areanum = areanum;
	VectorCopy(origin, curupdate->start);
	curupdate->areatraveltimes = aasworld.areatraveltimes[areanum][0];
	curupdate->tmptraveltime = 0;
	//put the area to start with in the current read list
	curupdate->next = NULL;
	curupdate->prev = NULL;
	updateliststart = curupdate;
	updatelistend = curupdate;
	//while there are updates in the list
	while (updateliststart)
	{
		curupdate = updateliststart;
		//
		if (curupdate->next) curupdate->next->prev = NULL;
		else updatelistend = NULL;
		updateliststart = curupdate->next;
		//
		curupdate->inlist = qfalse;
		//check all reversed reachability links
		numreach = aasworld.areasettings[curupdate->areanum].numreachableareas;
		reach = &aasworld.reachability[aasworld.areasettings[curupdate->areanum].firstreachablearea];
		//
		for (i = 0; i < numreach; i++, reach++)
		{
			//if an undesired travel type is used
			if (AAS_TravelFlagForType_inline(reach->traveltype) & badtravelflags) continue;
			//
			if (AAS_AreaContentsTravelFlags_inline(reach->areanum) & badtravelflags) continue;
			//number of the area the reachability leads to
			nextareanum = reach->areanum;
			// if this moves us into the enemies area, skip it
			if (nextareanum == enemyareanum) continue;
			//time already travelled plus the traveltime through
			//the current area plus the travel time from the reachability
			t = curupdate->tmptraveltime +
						AAS_AreaTravelTime(curupdate->areanum, curupdate->start, reach->start) +
							reach->traveltime;

			//avoid going near the enemy
			AAS_ProjectPointOntoVector(enemyorigin, curupdate->start, reach->end, p);
			for (j = 0; j < 3; j++)
				if ((p[j] > curupdate->start[j] && p[j] > reach->end[j]) ||
					(p[j] < curupdate->start[j] && p[j] < reach->end[j]))
					break;
			if (j < 3)
			{
				VectorSubtract(enemyorigin, reach->end, v2);
			} //end if
			else
			{
				VectorSubtract(enemyorigin, p, v2);
			} //end else
			dist2 = VectorLength(v2);
			//never go through the enemy
			if (dist2 < 40) continue;
			//
			VectorSubtract(enemyorigin, curupdate->start, v1);
			dist1 = VectorLength(v1);
			//
			if (dist2 < dist1)
			{
				t += (dist1 - dist2) * 10;
			}
			// if we weren't visible when starting, make sure we don't move into their view
			if (!startVisible && AAS_AreaVisible(enemyareanum, nextareanum)) {
				continue;
			}
			//
			if (besttraveltime && t >= besttraveltime) continue;
			//
			if (!hidetraveltimes[nextareanum] ||
					hidetraveltimes[nextareanum] > t)
			{
				//if the nextarea is not visible from the enemy area
				if (!AAS_AreaVisible(enemyareanum, nextareanum))
				{
					besttraveltime = t;
					bestarea = nextareanum;
				} //end if
				hidetraveltimes[nextareanum] = t;
				nextupdate = &aasworld.areaupdate[nextareanum];
				nextupdate->areanum = nextareanum;
				nextupdate->tmptraveltime = t;
				//remember where we entered this area
				VectorCopy(reach->end, nextupdate->start);
				//if this update is not in the list yet
				if (!nextupdate->inlist)
				{
					//add the new update to the end of the list
					nextupdate->next = NULL;
					nextupdate->prev = updatelistend;
					if (updatelistend) updatelistend->next = nextupdate;
					else updateliststart = nextupdate;
					updatelistend = nextupdate;
					nextupdate->inlist = qtrue;
				} //end if
			} //end if
		} //end for
	} //end while
	return bestarea;
} //end of the function AAS_NearestHideArea