summaryrefslogtreecommitdiff
path: root/indra/newview/llmanipscale.cpp
blob: a28118ff23bf5d4c4d00c942f0a61564ea523822 (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
/** 
 * @file llmanipscale.cpp
 * @brief LLManipScale class implementation
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llmanipscale.h"

// library includes
#include "llmath.h"
#include "v3math.h"
#include "llquaternion.h"
#include "llgl.h"
#include "llrender.h"
#include "v4color.h"
#include "llprimitive.h"

// viewer includes
#include "llagent.h"
#include "llagentcamera.h"
#include "llbbox.h"
#include "llbox.h"
#include "llviewercontrol.h"
#include "llcriticaldamp.h"
#include "lldrawable.h"
#include "llfloatertools.h"
#include "llglheaders.h"
#include "llselectmgr.h"
#include "llstatusbar.h"
#include "llui.h"
#include "llviewercamera.h"
#include "llviewerobject.h"
#include "llviewerregion.h"
#include "llviewerwindow.h"
#include "llhudrender.h"
#include "llworld.h"
#include "v2math.h"
#include "llvoavatar.h"
#include "llmeshrepository.h"
#include "lltrans.h"

const F32 MAX_MANIP_SELECT_DISTANCE_SQUARED = 11.f * 11.f;
const F32 SNAP_GUIDE_SCREEN_OFFSET = 0.05f;
const F32 SNAP_GUIDE_SCREEN_LENGTH = 0.7f;
const F32 SELECTED_MANIPULATOR_SCALE = 1.2f;
const F32 MANIPULATOR_SCALE_HALF_LIFE = 0.07f;

const LLManip::EManipPart MANIPULATOR_IDS[LLManipScale::NUM_MANIPULATORS] = 
{
	LLManip::LL_CORNER_NNN,
	LLManip::LL_CORNER_NNP,
	LLManip::LL_CORNER_NPN,
	LLManip::LL_CORNER_NPP,
	LLManip::LL_CORNER_PNN,
	LLManip::LL_CORNER_PNP,
	LLManip::LL_CORNER_PPN,
	LLManip::LL_CORNER_PPP,
	LLManip::LL_FACE_POSZ,
	LLManip::LL_FACE_POSX,
	LLManip::LL_FACE_POSY,
	LLManip::LL_FACE_NEGX,
	LLManip::LL_FACE_NEGY,
	LLManip::LL_FACE_NEGZ
};

F32 get_default_max_prim_scale(bool is_flora)
{
	// a bit of a hack, but if it's foilage, we don't want to use the
	// new larger scale which would result in giant trees and grass
	if (gMeshRepo.meshRezEnabled() &&
		!is_flora)
	{
		return DEFAULT_MAX_PRIM_SCALE;
	}
	else
	{
		return DEFAULT_MAX_PRIM_SCALE_NO_MESH;
	}
}

// static
void LLManipScale::setUniform(BOOL b)
{
	gSavedSettings.setBOOL("ScaleUniform", b);
}

// static
void LLManipScale::setShowAxes(BOOL b)
{
	gSavedSettings.setBOOL("ScaleShowAxes", b);
}

// static
void LLManipScale::setStretchTextures(BOOL b)
{
	gSavedSettings.setBOOL("ScaleStretchTextures", b);
}

// static
BOOL LLManipScale::getUniform()
{
	return gSavedSettings.getBOOL("ScaleUniform");
}

// static
BOOL LLManipScale::getShowAxes()
{
	return gSavedSettings.getBOOL("ScaleShowAxes");
}

// static
BOOL LLManipScale::getStretchTextures()
{
	return gSavedSettings.getBOOL("ScaleStretchTextures");
}

inline void LLManipScale::conditionalHighlight( U32 part, const LLColor4* highlight, const LLColor4* normal )
{
	LLColor4 default_highlight( 1.f, 1.f, 1.f, 1.f );
	LLColor4 default_normal( 0.7f, 0.7f, 0.7f, 0.6f );
	LLColor4 invisible(0.f, 0.f, 0.f, 0.f);

	for (S32 i = 0; i < NUM_MANIPULATORS; i++)
	{
		if((U32)MANIPULATOR_IDS[i] == part)
		{
			mScaledBoxHandleSize = mManipulatorScales[i] * mBoxHandleSize[i];
			break;
		}
	}

	if (mManipPart != (S32)LL_NO_PART && mManipPart != (S32)part)
	{
		gGL.color4fv( invisible.mV );
	}
	else if( mHighlightedPart == (S32)part )
	{
		gGL.color4fv( highlight ? highlight->mV : default_highlight.mV );
	}
	else
	{
		gGL.color4fv( normal ? normal->mV : default_normal.mV  );
	}
}

void LLManipScale::handleSelect()
{
	LLBBox bbox = LLSelectMgr::getInstance()->getBBoxOfSelection();
	updateSnapGuides(bbox);
	LLSelectMgr::getInstance()->saveSelectedObjectTransform(SELECT_ACTION_TYPE_PICK);
    if (gFloaterTools)
    {
        gFloaterTools->setStatusText("scale");
    }
	LLManip::handleSelect();
}

LLManipScale::LLManipScale( LLToolComposite* composite )
	:
	LLManip( std::string("Scale"), composite ),
	mScaledBoxHandleSize( 1.f ),
	mLastMouseX( -1 ),
	mLastMouseY( -1 ),
	mSendUpdateOnMouseUp( FALSE ),
	mLastUpdateFlags( 0 ),
	mScaleSnapUnit1(1.f),
	mScaleSnapUnit2(1.f),
	mSnapRegimeOffset(0.f),
	mTickPixelSpacing1(0.f),
	mTickPixelSpacing2(0.f),
	mSnapGuideLength(0.f),
	mSnapRegime(SNAP_REGIME_NONE),
	mScaleSnappedValue(0.f)
{
	for (S32 i = 0; i < NUM_MANIPULATORS; i++)
	{
		mManipulatorScales[i] = 1.f;
		mBoxHandleSize[i]     = 1.f;
	}
}

LLManipScale::~LLManipScale()
{
	for_each(mProjectedManipulators.begin(), mProjectedManipulators.end(), DeletePointer());
}

void LLManipScale::render()
{
	LLGLSUIDefault gls_ui;
	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
	LLGLDepthTest gls_depth(GL_TRUE);
	LLGLEnable gl_blend(GL_BLEND);
#if GL_VERSION_1_1
	LLGLEnable gls_alpha_test(GL_ALPHA_TEST);
#endif
	LLBBox bbox = LLSelectMgr::getInstance()->getBBoxOfSelection();

	if( canAffectSelection() )
	{
		gGL.matrixMode(LLRender::MM_MODELVIEW);
		gGL.pushMatrix();
		if (mObjectSelection->getSelectType() == SELECT_TYPE_HUD)
		{
			F32 zoom = gAgentCamera.mHUDCurZoom;
			gGL.scalef(zoom, zoom, zoom);
		}

		////////////////////////////////////////////////////////////////////////
		// Calculate size of drag handles

		const F32 BOX_HANDLE_BASE_SIZE		= 50.0f;   // box size in pixels = BOX_HANDLE_BASE_SIZE * BOX_HANDLE_BASE_FACTOR
		const F32 BOX_HANDLE_BASE_FACTOR	= 0.2f;

		//Assume that UI scale factor is equivalent for X and Y axis
		F32 ui_scale_factor = LLUI::getScaleFactor().mV[VX];

		if (mObjectSelection->getSelectType() == SELECT_TYPE_HUD)
		{
			for (S32 i = 0; i < NUM_MANIPULATORS; i++)
			{
				mBoxHandleSize[i] = BOX_HANDLE_BASE_SIZE * BOX_HANDLE_BASE_FACTOR / (F32) LLViewerCamera::getInstance()->getViewHeightInPixels();
				mBoxHandleSize[i] /= gAgentCamera.mHUDCurZoom;
				mBoxHandleSize[i] *= ui_scale_factor;
			}
		}
		else
		{
			for (S32 i = 0; i < NUM_MANIPULATORS; i++)
			{
				LLVector3 manipulator_pos = bbox.localToAgent(unitVectorToLocalBBoxExtent(partToUnitVector(MANIPULATOR_IDS[i]), bbox));
				F32 range_squared = dist_vec_squared(gAgentCamera.getCameraPositionAgent(), manipulator_pos);
				F32 range_from_agent_squared = dist_vec_squared(gAgent.getPositionAgent(), manipulator_pos);

				// Don't draw manip if object too far away
				if (gSavedSettings.getBOOL("LimitSelectDistance"))
				{
					F32 max_select_distance = gSavedSettings.getF32("MaxSelectDistance");
					if (range_from_agent_squared > max_select_distance * max_select_distance)
					{
						return;
					}
				}

				if (range_squared > 0.001f * 0.001f)
				{
					// range != zero
					F32 fraction_of_fov = BOX_HANDLE_BASE_SIZE / (F32) LLViewerCamera::getInstance()->getViewHeightInPixels();
					F32 apparent_angle = fraction_of_fov * LLViewerCamera::getInstance()->getView();  // radians
					mBoxHandleSize[i] = (F32) sqrtf(range_squared) * tan(apparent_angle) * BOX_HANDLE_BASE_FACTOR;
				}
				else
				{
					// range == zero
					mBoxHandleSize[i] = BOX_HANDLE_BASE_FACTOR;
				}
				mBoxHandleSize[i] *= ui_scale_factor;
			}
		}

		////////////////////////////////////////////////////////////////////////
		// Draw bounding box

		LLVector3 pos_agent = bbox.getPositionAgent();
		LLQuaternion rot = bbox.getRotation();

		gGL.matrixMode(LLRender::MM_MODELVIEW);
		gGL.pushMatrix();
		{
			gGL.translatef(pos_agent.mV[VX], pos_agent.mV[VY], pos_agent.mV[VZ]);

			F32 angle_radians, x, y, z;
			rot.getAngleAxis(&angle_radians, &x, &y, &z);
			gGL.rotatef(angle_radians * RAD_TO_DEG, x, y, z);


			{
				LLGLEnable poly_offset(GL_POLYGON_OFFSET_FILL);
				glPolygonOffset( -2.f, -2.f);

				renderCorners( bbox );
				renderFaces( bbox );

				if (mManipPart != LL_NO_PART)
				{
					renderGuidelinesPart( bbox );
				}

				glPolygonOffset( 0.f, 0.f);
			}
		}
		gGL.popMatrix();

		if (mManipPart != LL_NO_PART)
		{
			renderSnapGuides(bbox);
		}
		gGL.popMatrix();

		renderXYZ(bbox.getExtentLocal());
	}
}

BOOL LLManipScale::handleMouseDown(S32 x, S32 y, MASK mask)
{
	BOOL	handled = FALSE;

	if(mHighlightedPart != LL_NO_PART)
	{
		handled = handleMouseDownOnPart( x, y, mask );
	}

	return handled;
}

// Assumes that one of the arrows on an object was hit.
BOOL LLManipScale::handleMouseDownOnPart( S32 x, S32 y, MASK mask )
{
	BOOL can_scale = canAffectSelection();
	if (!can_scale)
	{
		return FALSE;
	}

	highlightManipulators(x, y);
	S32 hit_part = mHighlightedPart;

	LLSelectMgr::getInstance()->enableSilhouette(FALSE);
	mManipPart = (EManipPart)hit_part;

	LLBBox bbox = LLSelectMgr::getInstance()->getBBoxOfSelection();
	LLVector3 box_center_agent = bbox.getCenterAgent();
	LLVector3 box_corner_agent = bbox.localToAgent( unitVectorToLocalBBoxExtent( partToUnitVector( mManipPart ), bbox ) );

	updateSnapGuides(bbox);

	mFirstClickX = x;
	mFirstClickY = y;
	mIsFirstClick = true;

	mDragStartPointGlobal = gAgent.getPosGlobalFromAgent(box_corner_agent);
	mDragStartCenterGlobal = gAgent.getPosGlobalFromAgent(box_center_agent);
	LLVector3 far_corner_agent = bbox.localToAgent( unitVectorToLocalBBoxExtent( -1.f * partToUnitVector( mManipPart ), bbox ) );
	mDragFarHitGlobal = gAgent.getPosGlobalFromAgent(far_corner_agent);
	mDragPointGlobal = mDragStartPointGlobal;

	// we just started a drag, so save initial object positions, orientations, and scales
	LLSelectMgr::getInstance()->saveSelectedObjectTransform(SELECT_ACTION_TYPE_SCALE);
	// Route future Mouse messages here preemptively.  (Release on mouse up.)
	setMouseCapture( TRUE );

	mHelpTextTimer.reset();
	sNumTimesHelpTextShown++;
	return TRUE;
}


BOOL LLManipScale::handleMouseUp(S32 x, S32 y, MASK mask)
{
	// first, perform normal processing in case this was a quick-click
	handleHover(x, y, mask);

	if( hasMouseCapture() )
	{
		if( (LL_FACE_MIN <= (S32)mManipPart)
			&& ((S32)mManipPart <= LL_FACE_MAX) )
		{
			sendUpdates(TRUE,TRUE,FALSE);
		}
		else
		if( (LL_CORNER_MIN <= (S32)mManipPart)
			&& ((S32)mManipPart <= LL_CORNER_MAX) )
		{
			sendUpdates(TRUE,TRUE,TRUE);
		}

		//send texture update
		LLSelectMgr::getInstance()->adjustTexturesByScale(TRUE, getStretchTextures());

		LLSelectMgr::getInstance()->enableSilhouette(TRUE);
		mManipPart = LL_NO_PART;

		// Might have missed last update due to UPDATE_DELAY timing
		LLSelectMgr::getInstance()->sendMultipleUpdate( mLastUpdateFlags );

		//gAgent.setObjectTracking(gSavedSettings.getBOOL("TrackFocusObject"));
		LLSelectMgr::getInstance()->saveSelectedObjectTransform(SELECT_ACTION_TYPE_PICK);
	}
	return LLManip::handleMouseUp(x, y, mask);
}


BOOL LLManipScale::handleHover(S32 x, S32 y, MASK mask)
{
	if( hasMouseCapture() )
	{
		if( mObjectSelection->isEmpty() )
		{
			// Somehow the object got deselected while we were dragging it.
			setMouseCapture( FALSE );
		}
		else
		{
			if((mFirstClickX != x) || (mFirstClickY != y))
			{
				mIsFirstClick = false;
			}

			if(!mIsFirstClick)
			{
				drag( x, y );
			}
		}
		LL_DEBUGS("UserInput") << "hover handled by LLManipScale (active)" << LL_ENDL;		
	}
	else
	{
		mSnapRegime = SNAP_REGIME_NONE;
		// not dragging...
		highlightManipulators(x, y);
	}

	// Patch up textures, if possible.
	LLSelectMgr::getInstance()->adjustTexturesByScale(FALSE, getStretchTextures());

	gViewerWindow->setCursor(UI_CURSOR_TOOLSCALE);
	return TRUE;
}

void LLManipScale::highlightManipulators(S32 x, S32 y)
{
	mHighlightedPart = LL_NO_PART;

	// If we have something selected, try to hit its manipulator handles.
	// Don't do this with nothing selected, as it kills the framerate.
	LLBBox bbox = LLSelectMgr::getInstance()->getBBoxOfSelection();

	if( canAffectSelection() )
	{
		LLMatrix4 transform;
		if (mObjectSelection->getSelectType() == SELECT_TYPE_HUD)
		{
			LLVector4 translation(bbox.getPositionAgent());
			transform.initRotTrans(bbox.getRotation(), translation);
			LLMatrix4 cfr(OGL_TO_CFR_ROTATION);
			transform *= cfr;
			LLMatrix4 window_scale;
			F32 zoom_level = 2.f * gAgentCamera.mHUDCurZoom;
			window_scale.initAll(LLVector3(zoom_level / LLViewerCamera::getInstance()->getAspect(), zoom_level, 0.f),
				LLQuaternion::DEFAULT,
				LLVector3::zero);
			transform *= window_scale;
		}
		else
		{
			LLMatrix4 projMatrix = LLViewerCamera::getInstance()->getProjection();
			LLMatrix4 modelView = LLViewerCamera::getInstance()->getModelview();
			transform.initAll(LLVector3(1.f, 1.f, 1.f), bbox.getRotation(), bbox.getPositionAgent());

			transform *= modelView;
			transform *= projMatrix;
		}

		LLVector3 min = bbox.getMinLocal();
		LLVector3 max = bbox.getMaxLocal();
		LLVector3 ctr = bbox.getCenterLocal();

		S32 numManips = 0;
		// corners
		mManipulatorVertices[numManips++] = LLVector4(min.mV[VX], min.mV[VY], min.mV[VZ], 1.f);
		mManipulatorVertices[numManips++] = LLVector4(min.mV[VX], min.mV[VY], max.mV[VZ], 1.f);
		mManipulatorVertices[numManips++] = LLVector4(min.mV[VX], max.mV[VY], min.mV[VZ], 1.f);
		mManipulatorVertices[numManips++] = LLVector4(min.mV[VX], max.mV[VY], max.mV[VZ], 1.f);
		mManipulatorVertices[numManips++] = LLVector4(max.mV[VX], min.mV[VY], min.mV[VZ], 1.f);
		mManipulatorVertices[numManips++] = LLVector4(max.mV[VX], min.mV[VY], max.mV[VZ], 1.f);
		mManipulatorVertices[numManips++] = LLVector4(max.mV[VX], max.mV[VY], min.mV[VZ], 1.f);
		mManipulatorVertices[numManips++] = LLVector4(max.mV[VX], max.mV[VY], max.mV[VZ], 1.f);

		// 1-D highlights are applicable iff one object is selected
		if( mObjectSelection->getObjectCount() == 1 )
		{
			// face centers
			mManipulatorVertices[numManips++] = LLVector4(ctr.mV[VX], ctr.mV[VY], max.mV[VZ], 1.f);
			mManipulatorVertices[numManips++] = LLVector4(max.mV[VX], ctr.mV[VY], ctr.mV[VZ], 1.f);
			mManipulatorVertices[numManips++] = LLVector4(ctr.mV[VX], max.mV[VY], ctr.mV[VZ], 1.f);
			mManipulatorVertices[numManips++] = LLVector4(min.mV[VX], ctr.mV[VY], ctr.mV[VZ], 1.f);
			mManipulatorVertices[numManips++] = LLVector4(ctr.mV[VX], min.mV[VY], ctr.mV[VZ], 1.f);
			mManipulatorVertices[numManips++] = LLVector4(ctr.mV[VX], ctr.mV[VY], min.mV[VZ], 1.f);
		}

		for_each(mProjectedManipulators.begin(), mProjectedManipulators.end(), DeletePointer());
		mProjectedManipulators.clear();

		for (S32 i = 0; i < numManips; i++)
		{
			LLVector4 projectedVertex = mManipulatorVertices[i] * transform;
			projectedVertex = projectedVertex * (1.f / projectedVertex.mV[VW]);

			ManipulatorHandle* projManipulator = new ManipulatorHandle(LLVector3(projectedVertex.mV[VX], projectedVertex.mV[VY],
				projectedVertex.mV[VZ]), MANIPULATOR_IDS[i], (i < 7) ? SCALE_MANIP_CORNER : SCALE_MANIP_FACE);
			mProjectedManipulators.insert(projManipulator);
		}

		LLRect world_view_rect = gViewerWindow->getWorldViewRectScaled();
		F32 half_width = (F32)world_view_rect.getWidth() / 2.f;
		F32 half_height = (F32)world_view_rect.getHeight() / 2.f;
		LLVector2 manip2d;
		LLVector2 mousePos((F32)x - half_width, (F32)y - half_height);
		LLVector2 delta;

		mHighlightedPart = LL_NO_PART;

		for (manipulator_list_t::iterator iter = mProjectedManipulators.begin();
			 iter != mProjectedManipulators.end(); ++iter)
		{
			ManipulatorHandle* manipulator = *iter;
			{
				manip2d.set(manipulator->mPosition.mV[VX] * half_width, manipulator->mPosition.mV[VY] * half_height);

				delta = manip2d - mousePos;
				if (delta.lengthSquared() < MAX_MANIP_SELECT_DISTANCE_SQUARED)
				{
					mHighlightedPart = manipulator->mManipID;

					//LL_INFOS() << "Tried: " << mHighlightedPart << LL_ENDL;
					break;
				}
			}
		}
	}

	for (S32 i = 0; i < NUM_MANIPULATORS; i++)
	{
		if (mHighlightedPart == MANIPULATOR_IDS[i])
		{
			mManipulatorScales[i] = lerp(mManipulatorScales[i], SELECTED_MANIPULATOR_SCALE, LLSmoothInterpolation::getInterpolant(MANIPULATOR_SCALE_HALF_LIFE));
		}
		else
		{
			mManipulatorScales[i] = lerp(mManipulatorScales[i], 1.f, LLSmoothInterpolation::getInterpolant(MANIPULATOR_SCALE_HALF_LIFE));
		}
	}

	LL_DEBUGS("UserInput") << "hover handled by LLManipScale (inactive)" << LL_ENDL;
}


void LLManipScale::renderFaces( const LLBBox& bbox )
{
	// Don't bother to render the drag handles for 1-D scaling if
	// more than one object is selected or if it is an attachment
	if ( mObjectSelection->getObjectCount() > 1 )
	{
		return;
	}

	// This is a flattened representation of the box as render here
	//                                       .
	//              (+++)        (++-)      /|\t
	//                +------------+         | (texture coordinates)
	//                |            |         |
	//                |     1      |        (*) --->s
	//                |    +X      |   
	//                |            |
	// (+++)     (+-+)|            |(+--)     (++-)        (+++)
	//   +------------+------------+------------+------------+
	//   |0          3|3          7|7          4|4          0|
	//   |     0      |     4      |     5      |     2	     |
	//   |    +Z      |    -Y      |    -Z      |    +Y      |
	//   |	          |            |            |            |
	//   |1          2|2          6|6          5|5          1|
	//   +------------+------------+------------+------------+
	// (-++)     (--+)|            |(---)     (-+-)        (-++)
	//                |     3      |
	//                |    -X      |
	//                |            |
	//                |            |
	//                +------------+
	//              (-++)        (-+-)

	LLColor4 highlight_color( 1.f, 1.f, 1.f, 0.5f);
	LLColor4 normal_color(	1.f, 1.f, 1.f, 0.3f);

	LLColor4 x_highlight_color( 1.f, 0.2f, 0.2f, 1.0f);
	LLColor4 x_normal_color(	0.6f, 0.f, 0.f, 0.4f);

	LLColor4 y_highlight_color( 0.2f, 1.f, 0.2f, 1.0f);
	LLColor4 y_normal_color(	0.f, 0.6f, 0.f, 0.4f);

	LLColor4 z_highlight_color( 0.2f, 0.2f, 1.f, 1.0f);
	LLColor4 z_normal_color(	0.f, 0.f, 0.6f, 0.4f);

	LLColor4 default_normal_color( 0.7f, 0.7f, 0.7f, 0.15f );

	const LLVector3& min = bbox.getMinLocal();
	const LLVector3& max = bbox.getMaxLocal();
	LLVector3 ctr = bbox.getCenterLocal();

	if (mManipPart == LL_NO_PART)
	{
		gGL.color4fv( default_normal_color.mV );
		LLGLDepthTest gls_depth(GL_FALSE);
		gGL.begin(LLRender::QUADS);
		{
			// Face 0
			gGL.vertex3f(min.mV[VX], max.mV[VY], max.mV[VZ]);
			gGL.vertex3f(min.mV[VX], min.mV[VY], max.mV[VZ]);
			gGL.vertex3f(max.mV[VX], min.mV[VY], max.mV[VZ]);
			gGL.vertex3f(max.mV[VX], max.mV[VY], max.mV[VZ]);

			// Face 1
			gGL.vertex3f(max.mV[VX], min.mV[VY], max.mV[VZ]);
			gGL.vertex3f(max.mV[VX], min.mV[VY], min.mV[VZ]);
			gGL.vertex3f(max.mV[VX], max.mV[VY], min.mV[VZ]);
			gGL.vertex3f(max.mV[VX], max.mV[VY], max.mV[VZ]);

			// Face 2
			gGL.vertex3f(min.mV[VX], max.mV[VY], min.mV[VZ]);
			gGL.vertex3f(min.mV[VX], max.mV[VY], max.mV[VZ]);
			gGL.vertex3f(max.mV[VX], max.mV[VY], max.mV[VZ]);
			gGL.vertex3f(max.mV[VX], max.mV[VY], min.mV[VZ]);

			// Face 3
			gGL.vertex3f(min.mV[VX], max.mV[VY], max.mV[VZ]);
			gGL.vertex3f(min.mV[VX], max.mV[VY], min.mV[VZ]);
			gGL.vertex3f(min.mV[VX], min.mV[VY], min.mV[VZ]);
			gGL.vertex3f(min.mV[VX], min.mV[VY], max.mV[VZ]);

			// Face 4
			gGL.vertex3f(min.mV[VX], min.mV[VY], max.mV[VZ]);
			gGL.vertex3f(min.mV[VX], min.mV[VY], min.mV[VZ]);
			gGL.vertex3f(max.mV[VX], min.mV[VY], min.mV[VZ]);
			gGL.vertex3f(max.mV[VX], min.mV[VY], max.mV[VZ]);

			// Face 5
			gGL.vertex3f(min.mV[VX], min.mV[VY], min.mV[VZ]);
			gGL.vertex3f(min.mV[VX], max.mV[VY], min.mV[VZ]);
			gGL.vertex3f(max.mV[VX], max.mV[VY], min.mV[VZ]);
			gGL.vertex3f(max.mV[VX], min.mV[VY], min.mV[VZ]);
		}
		gGL.end();
	}

	// Find nearest vertex
	LLVector3 orientWRTHead = bbox.agentToLocalBasis( bbox.getCenterAgent() - gAgentCamera.getCameraPositionAgent() );
	U32 nearest =
		(orientWRTHead.mV[0] < 0.0f ? 1 : 0) +
		(orientWRTHead.mV[1] < 0.0f ? 2 : 0) +
		(orientWRTHead.mV[2] < 0.0f ? 4 : 0);

	// opposite faces on Linden cubes:
	// 0 & 5
	// 1 & 3
	// 2 & 4

	// Table of order to draw faces, based on nearest vertex
	static U32 face_list[8][6] = {
		{ 2,0,1, 4,5,3 }, // v6  F201 F453
		{ 2,0,3, 4,5,1 }, // v7  F203 F451
		{ 4,0,1, 2,5,3 }, // v5  F401 F253
		{ 4,0,3, 2,5,1 }, // v4  F403 F251
		{ 2,5,1, 4,0,3 }, // v2  F251 F403
		{ 2,5,3, 4,0,1 }, // v3  F253 F401
		{ 4,5,1, 2,0,3 }, // v1  F451 F203
		{ 4,5,3, 2,0,1 }  // v0  F453 F201
	};

	{
		LLGLDepthTest gls_depth(GL_FALSE);

		for (S32 i = 0; i < 6; i++)
		{
			U32 face = face_list[nearest][i];
			switch( face )
			{
			  case 0:
				conditionalHighlight( LL_FACE_POSZ, &z_highlight_color, &z_normal_color );
				renderAxisHandle( 8, ctr, LLVector3( ctr.mV[VX], ctr.mV[VY], max.mV[VZ] ) );
				break;

			  case 1:
				conditionalHighlight( LL_FACE_POSX, &x_highlight_color, &x_normal_color );
				renderAxisHandle( 9, ctr, LLVector3( max.mV[VX], ctr.mV[VY], ctr.mV[VZ] ) );
				break;

			  case 2:
				conditionalHighlight( LL_FACE_POSY, &y_highlight_color, &y_normal_color );
				renderAxisHandle( 10, ctr, LLVector3( ctr.mV[VX], max.mV[VY], ctr.mV[VZ] ) );
				break;

			  case 3:
				conditionalHighlight( LL_FACE_NEGX, &x_highlight_color, &x_normal_color );
				renderAxisHandle( 11, ctr, LLVector3( min.mV[VX], ctr.mV[VY], ctr.mV[VZ] ) );
				break;

			  case 4:
				conditionalHighlight( LL_FACE_NEGY, &y_highlight_color, &y_normal_color );
				renderAxisHandle( 12, ctr, LLVector3( ctr.mV[VX], min.mV[VY], ctr.mV[VZ] ) );
				break;

			  case 5:
				conditionalHighlight( LL_FACE_NEGZ, &z_highlight_color, &z_normal_color );
				renderAxisHandle( 13, ctr, LLVector3( ctr.mV[VX], ctr.mV[VY], min.mV[VZ] ) );
				break;
			}
		}
	}
}

void LLManipScale::renderCorners( const LLBBox& bbox )
{
	U32 part = LL_CORNER_NNN;

	F32 x_offset = bbox.getMinLocal().mV[VX];
	for( S32 i=0; i < 2; i++ )
	{
		F32 y_offset = bbox.getMinLocal().mV[VY];
		for( S32 j=0; j < 2; j++ )
		{
			F32 z_offset = bbox.getMinLocal().mV[VZ];
			for( S32 k=0; k < 2; k++ )
			{
				conditionalHighlight( part );
				renderBoxHandle( x_offset, y_offset, z_offset );
				part++;

				z_offset = bbox.getMaxLocal().mV[VZ];

			}
			y_offset = bbox.getMaxLocal().mV[VY];
		}
		x_offset = bbox.getMaxLocal().mV[VX];
	}
}


void LLManipScale::renderBoxHandle( F32 x, F32 y, F32 z )
{
	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
	LLGLDepthTest gls_depth(GL_FALSE);
	LLGLDisable gls_stencil(GL_STENCIL_TEST);

	gGL.pushMatrix();
	{
		gGL.translatef( x, y, z );
		gGL.scalef( mScaledBoxHandleSize, mScaledBoxHandleSize, mScaledBoxHandleSize );
		gBox.render();
	}
	gGL.popMatrix();
}


void LLManipScale::renderAxisHandle( U32 handle_index, const LLVector3& start, const LLVector3& end )
{
	if( getShowAxes() )
	{
		// Draws a single "jacks" style handle: a long, retangular box from start to end.
		LLVector3 offset_start = end - start;
		offset_start.normalize();
		offset_start = start + mBoxHandleSize[handle_index] * offset_start;

		LLVector3 delta = end - offset_start;
		LLVector3 pos = offset_start + 0.5f * delta;

		gGL.pushMatrix();
		{
			gGL.translatef( pos.mV[VX], pos.mV[VY], pos.mV[VZ] );
			gGL.scalef(
				mBoxHandleSize[handle_index] + llabs(delta.mV[VX]),
				mBoxHandleSize[handle_index] + llabs(delta.mV[VY]),
				mBoxHandleSize[handle_index] + llabs(delta.mV[VZ]));
			gBox.render();
		}
		gGL.popMatrix();
	}
	else
	{
		renderBoxHandle( end.mV[VX], end.mV[VY], end.mV[VZ] );
	}
}

// General scale call
void LLManipScale::drag( S32 x, S32 y )
{
	if( (LL_FACE_MIN <= (S32)mManipPart)
		&& ((S32)mManipPart <= LL_FACE_MAX) )
	{
		dragFace( x, y );
	}
	else if( (LL_CORNER_MIN <= (S32)mManipPart)
		&& ((S32)mManipPart <= LL_CORNER_MAX) )
	{
		dragCorner( x, y );
	}

	// store changes to override updates
	for (LLObjectSelection::iterator iter = LLSelectMgr::getInstance()->getSelection()->begin();
		 iter != LLSelectMgr::getInstance()->getSelection()->end(); iter++)
	{
		LLSelectNode* selectNode = *iter;
		LLViewerObject*cur = selectNode->getObject();
		LLViewerObject *root_object = (cur == NULL) ? NULL : cur->getRootEdit();
		if( cur->permModify() && cur->permMove() && !cur->isPermanentEnforced() &&
			((root_object == NULL) || !root_object->isPermanentEnforced()) &&
			!cur->isAvatar())
		{
			selectNode->mLastScale = cur->getScale();
			selectNode->mLastPositionLocal = cur->getPosition();
		}
	}

	LLSelectMgr::getInstance()->updateSelectionCenter();
	gAgentCamera.clearFocusObject();
}

// Scale on three axis simultaneously
void LLManipScale::dragCorner( S32 x, S32 y )
{
	// Suppress scale if mouse hasn't moved.
	if (x == mLastMouseX && y == mLastMouseY)
	{
		return;
	}
	mLastMouseX = x;
	mLastMouseY = y;

	LLVector3 drag_start_point_agent = gAgent.getPosAgentFromGlobal(mDragStartPointGlobal);
	LLVector3 drag_start_center_agent = gAgent.getPosAgentFromGlobal(mDragStartCenterGlobal);

	LLVector3d drag_start_dir_d;
	drag_start_dir_d.set(mDragStartPointGlobal - mDragStartCenterGlobal);

	F32 s = 0;
	F32 t = 0;
	nearestPointOnLineFromMouse(x, y,
								drag_start_center_agent,
								drag_start_point_agent,
								s, t );

	if( s <= 0 )  // we only care about intersections in front of the camera
	{
		return;
	}
	mDragPointGlobal = lerp(mDragStartCenterGlobal, mDragStartPointGlobal, t);

	LLBBox bbox	     = LLSelectMgr::getInstance()->getBBoxOfSelection();
	F32 scale_factor = 1.f;
	F32 max_scale    = partToMaxScale(mManipPart, bbox);
	F32 min_scale    = partToMinScale(mManipPart, bbox);
	BOOL uniform     = LLManipScale::getUniform();

	// check for snapping
	LLVector3 mouse_on_plane1;
	getMousePointOnPlaneAgent(mouse_on_plane1, x, y, mScaleCenter, mScalePlaneNormal1);
	mouse_on_plane1 -= mScaleCenter;

	LLVector3 mouse_on_plane2;
	getMousePointOnPlaneAgent(mouse_on_plane2, x, y, mScaleCenter, mScalePlaneNormal2);
	mouse_on_plane2 -= mScaleCenter;

	LLVector3 projected_drag_pos1 = inverse_projected_vec(mScaleDir, orthogonal_component(mouse_on_plane1, mSnapGuideDir1));
	LLVector3 projected_drag_pos2 = inverse_projected_vec(mScaleDir, orthogonal_component(mouse_on_plane2, mSnapGuideDir2));

	BOOL snap_enabled = gSavedSettings.getBOOL("SnapEnabled");
	if (snap_enabled && (mouse_on_plane1 - projected_drag_pos1) * mSnapGuideDir1 > mSnapRegimeOffset)
	{
		F32 drag_dist = mScaleDir * projected_drag_pos1; // Projecting the drag position allows for negative results, vs using the length which will result in a "reverse scaling" bug.

		F32 cur_subdivisions = llclamp(getSubdivisionLevel(mScaleCenter + projected_drag_pos1, mScaleDir, mScaleSnapUnit1, mTickPixelSpacing1), sGridMinSubdivisionLevel, sGridMaxSubdivisionLevel);
		F32 snap_dist = mScaleSnapUnit1 / (2.f * cur_subdivisions);
		F32 relative_snap_dist = fmodf(drag_dist + snap_dist, mScaleSnapUnit1 / cur_subdivisions);

		mScaleSnappedValue = llclamp((drag_dist - (relative_snap_dist - snap_dist)), min_scale, max_scale);
		scale_factor = mScaleSnappedValue / dist_vec(drag_start_point_agent, drag_start_center_agent);
		mScaleSnappedValue /= mScaleSnapUnit1 * 2.f;
		mSnapRegime = SNAP_REGIME_UPPER;

		if (!uniform)
		{
			scale_factor *= 0.5f;
		}
	}
	else if (snap_enabled && (mouse_on_plane2 - projected_drag_pos2) * mSnapGuideDir2 > mSnapRegimeOffset )
	{
		F32 drag_dist = mScaleDir * projected_drag_pos2; // Projecting the drag position allows for negative results, vs using the length which will result in a "reverse scaling" bug.

		F32 cur_subdivisions = llclamp(getSubdivisionLevel(mScaleCenter + projected_drag_pos2, mScaleDir, mScaleSnapUnit2, mTickPixelSpacing2), sGridMinSubdivisionLevel, sGridMaxSubdivisionLevel);
		F32 snap_dist = mScaleSnapUnit2 / (2.f * cur_subdivisions);
		F32 relative_snap_dist = fmodf(drag_dist + snap_dist, mScaleSnapUnit2 / cur_subdivisions);

		mScaleSnappedValue = llclamp((drag_dist - (relative_snap_dist - snap_dist)), min_scale, max_scale);
		scale_factor = mScaleSnappedValue / dist_vec(drag_start_point_agent, drag_start_center_agent);
		mScaleSnappedValue /= mScaleSnapUnit2 * 2.f;
		mSnapRegime = SNAP_REGIME_LOWER;

		if (!uniform)
		{
			scale_factor *= 0.5f;
		}
	}
	else
	{
		mSnapRegime = SNAP_REGIME_NONE;
		scale_factor = t;
		if (!uniform)
		{
			scale_factor = 0.5f + (scale_factor * 0.5f);
		}
	}


	F32 max_scale_factor = get_default_max_prim_scale() / MIN_PRIM_SCALE;
	F32 min_scale_factor = MIN_PRIM_SCALE / get_default_max_prim_scale();

	// find max and min scale factors that will make biggest object hit max absolute scale and smallest object hit min absolute scale
	for (LLObjectSelection::iterator iter = mObjectSelection->begin();
		 iter != mObjectSelection->end(); iter++)
	{
		LLSelectNode* selectNode = *iter;
		LLViewerObject* cur = selectNode->getObject();
		LLViewerObject *root_object = (cur == NULL) ? NULL : cur->getRootEdit();
		if(  cur->permModify() && cur->permMove() && !cur->isPermanentEnforced() &&
			((root_object == NULL) || !root_object->isPermanentEnforced()) &&
			!cur->isAvatar() )
		{
			const LLVector3& scale = selectNode->mSavedScale;

			F32 cur_max_scale_factor = llmin( get_default_max_prim_scale(LLPickInfo::isFlora(cur)) / scale.mV[VX], get_default_max_prim_scale(LLPickInfo::isFlora(cur)) / scale.mV[VY], get_default_max_prim_scale(LLPickInfo::isFlora(cur)) / scale.mV[VZ] );
			max_scale_factor = llmin( max_scale_factor, cur_max_scale_factor );

			F32 cur_min_scale_factor = llmax( MIN_PRIM_SCALE / scale.mV[VX], MIN_PRIM_SCALE / scale.mV[VY], MIN_PRIM_SCALE / scale.mV[VZ] );
			min_scale_factor = llmax( min_scale_factor, cur_min_scale_factor );
		}
	}

	scale_factor = llclamp( scale_factor, min_scale_factor, max_scale_factor );

	LLVector3d drag_global = uniform ? mDragStartCenterGlobal : mDragFarHitGlobal;

	// do the root objects i.e. (TRUE == cur->isRootEdit())
	for (LLObjectSelection::iterator iter = mObjectSelection->begin();
		 iter != mObjectSelection->end(); iter++)
	{
		LLSelectNode* selectNode = *iter;
		LLViewerObject* cur = selectNode->getObject();
		LLViewerObject *root_object = (cur == NULL) ? NULL : cur->getRootEdit();
		if( cur->permModify() && cur->permMove() && !cur->isPermanentEnforced() &&
			((root_object == NULL) || !root_object->isPermanentEnforced()) &&
			!cur->isAvatar() && cur->isRootEdit() )
		{
			const LLVector3& scale = selectNode->mSavedScale;
			cur->setScale( scale_factor * scale );

			LLVector3 delta_pos;
			LLVector3 original_pos = cur->getPositionEdit();
			LLVector3d new_pos_global = drag_global + (selectNode->mSavedPositionGlobal - drag_global) * scale_factor;
			if (!cur->isAttachment())
			{
				new_pos_global = LLWorld::getInstance()->clipToVisibleRegions(selectNode->mSavedPositionGlobal, new_pos_global);
			}
			cur->setPositionAbsoluteGlobal( new_pos_global );
			rebuild(cur);

			delta_pos = cur->getPositionEdit() - original_pos;

			if (selectNode->mIndividualSelection)
			{
				// counter-translate child objects if we are moving the root as an individual
				LLViewerObject::const_child_list_t& child_list = cur->getChildren();
				for (LLViewerObject::child_list_t::const_iterator iter = child_list.begin();
					 iter != child_list.end(); iter++)
				{
					LLViewerObject* childp = *iter;

					if (cur->isAttachment())
					{
						LLVector3 child_pos = childp->getPosition() - (delta_pos * ~cur->getRotationEdit());
						childp->setPosition(child_pos);
					}
					else
					{
						LLVector3d child_pos_delta(delta_pos);
						// RN: this updates drawable position instantly
						childp->setPositionAbsoluteGlobal(childp->getPositionGlobal() - child_pos_delta);
					}
					rebuild(childp);
				}
			}
		}
	}
	// do the child objects i.e. (FALSE == cur->isRootEdit())
	for (LLObjectSelection::iterator iter = mObjectSelection->begin();
		 iter != mObjectSelection->end(); iter++)
	{
		LLSelectNode* selectNode = *iter;
		LLViewerObject*cur = selectNode->getObject();
		LLViewerObject *root_object = (cur == NULL) ? NULL : cur->getRootEdit();
		if( cur->permModify() && cur->permMove() && !cur->isPermanentEnforced() &&
			((root_object == NULL) || !root_object->isPermanentEnforced()) &&
			!cur->isAvatar() && !cur->isRootEdit() )
		{
			const LLVector3& scale = selectNode->mSavedScale;
			cur->setScale( scale_factor * scale, FALSE );

			if (!selectNode->mIndividualSelection)
			{
				cur->setPosition(selectNode->mSavedPositionLocal * scale_factor);
			}

			rebuild(cur);
		}
	}
}

// Scale on a single axis
void LLManipScale::dragFace( S32 x, S32 y )
{
	// Suppress scale if mouse hasn't moved.
	if (x == mLastMouseX && y == mLastMouseY)
	{
		return;
	}

	mLastMouseX = x;
	mLastMouseY = y;

	LLVector3d drag_start_point_global	= mDragStartPointGlobal;
	LLVector3d drag_start_center_global = mDragStartCenterGlobal;
	LLVector3 drag_start_point_agent = gAgent.getPosAgentFromGlobal(drag_start_point_global);
	LLVector3 drag_start_center_agent = gAgent.getPosAgentFromGlobal(drag_start_center_global);

	LLVector3d drag_start_dir_d;
	drag_start_dir_d.set(drag_start_point_global - drag_start_center_global);
	LLVector3 drag_start_dir_f;
	drag_start_dir_f.set(drag_start_dir_d);

	LLBBox bbox	= LLSelectMgr::getInstance()->getBBoxOfSelection();

	F32 s = 0;
	F32 t = 0;

	nearestPointOnLineFromMouse(x,
						y,
						drag_start_center_agent,
						drag_start_point_agent,
						s, t );

	if( s <= 0 )  // we only care about intersections in front of the camera
	{
		return;
	}

	LLVector3d drag_point_global = drag_start_center_global + t * drag_start_dir_d;
	LLVector3 part_dir_local	= partToUnitVector( mManipPart );

	// check for snapping
	LLVector3 mouse_on_plane;
	getMousePointOnPlaneAgent(mouse_on_plane, x, y, mScaleCenter, mScalePlaneNormal1 );

	LLVector3 mouse_on_scale_line = mScaleCenter + projected_vec(mouse_on_plane - mScaleCenter, mScaleDir);
	LLVector3 drag_delta(mouse_on_scale_line - drag_start_point_agent);
	F32 max_drag_dist = partToMaxScale(mManipPart, bbox);
	F32 min_drag_dist = partToMinScale(mManipPart, bbox);

	BOOL uniform = LLManipScale::getUniform();
	if( uniform )
	{
		drag_delta *= 2.f;
	}

	LLVector3 scale_center_to_mouse = mouse_on_plane - mScaleCenter;
	F32 dist_from_scale_line = dist_vec(scale_center_to_mouse, (mouse_on_scale_line - mScaleCenter));
	F32 dist_along_scale_line = scale_center_to_mouse * mScaleDir;

	BOOL snap_enabled = gSavedSettings.getBOOL("SnapEnabled");

	if (snap_enabled && dist_from_scale_line > mSnapRegimeOffset)
	{
		mSnapRegime = static_cast<ESnapRegimes>(SNAP_REGIME_UPPER | SNAP_REGIME_LOWER); // A face drag doesn't have split regimes.

		if (dist_along_scale_line > max_drag_dist)
		{
			mScaleSnappedValue = max_drag_dist;

			LLVector3 clamp_point = mScaleCenter + max_drag_dist * mScaleDir;
			drag_delta.set(clamp_point - drag_start_point_agent);
		}
		else if (dist_along_scale_line < min_drag_dist)
		{
			mScaleSnappedValue = min_drag_dist;

			LLVector3 clamp_point = mScaleCenter + min_drag_dist * mScaleDir;
			drag_delta.set(clamp_point - drag_start_point_agent);
		}
		else
		{
			F32 drag_dist = scale_center_to_mouse * mScaleDir;
			F32 cur_subdivisions = llclamp(getSubdivisionLevel(mScaleCenter + mScaleDir * drag_dist, mScaleDir, mScaleSnapUnit1, mTickPixelSpacing1), sGridMinSubdivisionLevel, sGridMaxSubdivisionLevel);
			F32 snap_dist = mScaleSnapUnit1 / (2.f * cur_subdivisions);
			F32 relative_snap_dist = fmodf(drag_dist + snap_dist, mScaleSnapUnit1 / cur_subdivisions);
			relative_snap_dist -= snap_dist;

			//make sure that values that the scale is "snapped to"
			//do not exceed/go under the applicable max/mins
			//this causes the box to shift displacements ever so slightly
			//although the "snap value" should go down to 0
			//see Jira 1027
			relative_snap_dist = llclamp(relative_snap_dist,
										 drag_dist - max_drag_dist,
										 drag_dist - min_drag_dist);

			mScaleSnappedValue = (drag_dist - relative_snap_dist) / (mScaleSnapUnit1 * 2.f);

			if (llabs(relative_snap_dist) < snap_dist)
			{
				LLVector3 drag_correction = relative_snap_dist * mScaleDir;
				if (uniform)
				{
					drag_correction *= 2.f;
				}

				drag_delta -= drag_correction;
			}
		}
	}
	else
	{
		mSnapRegime = SNAP_REGIME_NONE;
	}

	LLVector3 dir_agent;
	if( part_dir_local.mV[VX] )
	{
		dir_agent = bbox.localToAgentBasis( LLVector3::x_axis );
	}
	else if( part_dir_local.mV[VY] )
	{
		dir_agent = bbox.localToAgentBasis( LLVector3::y_axis );
	}
	else if( part_dir_local.mV[VZ] )
	{
		dir_agent = bbox.localToAgentBasis( LLVector3::z_axis );
	}
	stretchFace(
		projected_vec(drag_start_dir_f, dir_agent) + drag_start_center_agent,
		projected_vec(drag_delta, dir_agent));

	mDragPointGlobal = drag_point_global;
}

void LLManipScale::sendUpdates( BOOL send_position_update, BOOL send_scale_update, BOOL corner )
{
	// Throttle updates to 10 per second.
	static LLTimer	update_timer;
	F32 elapsed_time = update_timer.getElapsedTimeF32();
	const F32 UPDATE_DELAY = 0.1f;						//  min time between transmitted updates

	if( send_scale_update || send_position_update )
	{
		U32 update_flags = UPD_NONE;
		if (send_position_update)	update_flags |= UPD_POSITION;
		if (send_scale_update)		update_flags |= UPD_SCALE;

// 		BOOL send_type = SEND_INDIVIDUALS;
		if (corner)
		{
			update_flags |= UPD_UNIFORM;
		}
		// keep this up to date for sendonmouseup
		mLastUpdateFlags = update_flags;

		// enforce minimum update delay and don't stream updates on sub-object selections
		if( elapsed_time > UPDATE_DELAY && !gSavedSettings.getBOOL("EditLinkedParts") )
		{
			LLSelectMgr::getInstance()->sendMultipleUpdate( update_flags );
			update_timer.reset();
			mSendUpdateOnMouseUp = FALSE;
		}
		else
		{
			mSendUpdateOnMouseUp = TRUE;
		}
		dialog_refresh_all();
	}
}

// Rescales in a single dimension.  Either uniform (standard) or one-sided (scale plus translation)
// depending on mUniform.  Handles multiple selection and objects that are not aligned to the bounding box.
void LLManipScale::stretchFace( const LLVector3& drag_start_agent, const LLVector3& drag_delta_agent )
{
	LLVector3 drag_start_center_agent = gAgent.getPosAgentFromGlobal(mDragStartCenterGlobal);

	for (LLObjectSelection::iterator iter = mObjectSelection->begin();
		 iter != mObjectSelection->end(); iter++)
	{
		LLSelectNode* selectNode = *iter;
		LLViewerObject*cur = selectNode->getObject();
		LLViewerObject *root_object = (cur == NULL) ? NULL : cur->getRootEdit();
		if( cur->permModify() && cur->permMove() && !cur->isPermanentEnforced() &&
			((root_object == NULL) || !root_object->isPermanentEnforced()) &&
			!cur->isAvatar() )
		{
			LLBBox cur_bbox			= cur->getBoundingBoxAgent();
			LLVector3 start_local	= cur_bbox.agentToLocal( drag_start_agent );
			LLVector3 end_local		= cur_bbox.agentToLocal( drag_start_agent + drag_delta_agent);
			LLVector3 start_center_local = cur_bbox.agentToLocal( drag_start_center_agent );
			LLVector3 axis			= nearestAxis( start_local - start_center_local );
			S32 axis_index			= axis.mV[0] ? 0 : (axis.mV[1] ? 1 : 2 );

			LLVector3 delta_local	= end_local - start_local;
			F32 delta_local_mag		= delta_local.length();
			LLVector3 dir_local;
			if (delta_local_mag == 0.f)
			{
				dir_local = axis;
			}
			else
			{
				dir_local = delta_local / delta_local_mag; // normalized delta_local
			}

			F32 denom = axis * dir_local;
			F32 desired_delta_size	= is_approx_zero(denom) ? 0.f : (delta_local_mag / denom);  // in meters
			F32 desired_scale		= llclamp(selectNode->mSavedScale.mV[axis_index] + desired_delta_size, MIN_PRIM_SCALE, get_default_max_prim_scale(LLPickInfo::isFlora(cur)));
			// propagate scale constraint back to position offset
			desired_delta_size		= desired_scale - selectNode->mSavedScale.mV[axis_index]; // propagate constraint back to position

			LLVector3 scale			= cur->getScale();
			scale.mV[axis_index]	= desired_scale;
			cur->setScale(scale, FALSE);
			rebuild(cur);
			LLVector3 delta_pos;
			if( !getUniform() )
			{
				LLVector3 delta_pos_local = axis * (0.5f * desired_delta_size);
				LLVector3d delta_pos_global;
				delta_pos_global.set(cur_bbox.localToAgent( delta_pos_local ) - cur_bbox.getCenterAgent());
				LLVector3 cur_pos = cur->getPositionEdit();

				if (cur->isRootEdit() && !cur->isAttachment())
				{
					LLVector3d new_pos_global = LLWorld::getInstance()->clipToVisibleRegions(selectNode->mSavedPositionGlobal, selectNode->mSavedPositionGlobal + delta_pos_global);
					cur->setPositionGlobal( new_pos_global );
				}
				else
				{
					LLXform* parent_xform = cur->mDrawable->getXform()->getParent();
					LLVector3 new_pos_local;
					// this works in attachment point space using world space delta
					if (parent_xform)
					{
						new_pos_local = selectNode->mSavedPositionLocal + (LLVector3(delta_pos_global) * ~parent_xform->getWorldRotation());
					}
					else
					{
						new_pos_local = selectNode->mSavedPositionLocal + LLVector3(delta_pos_global);
					}
					cur->setPosition(new_pos_local);
				}
				delta_pos = cur->getPositionEdit() - cur_pos;
			}
			if (cur->isRootEdit() && selectNode->mIndividualSelection)
			{
				// counter-translate child objects if we are moving the root as an individual
				LLViewerObject::const_child_list_t& child_list = cur->getChildren();
				for (LLViewerObject::child_list_t::const_iterator iter = child_list.begin();
					 iter != child_list.end(); iter++)
				{
					LLViewerObject* childp = *iter;
					if (!getUniform())
					{
						LLVector3 child_pos = childp->getPosition() - (delta_pos * ~cur->getRotationEdit());
						childp->setPosition(child_pos);
						rebuild(childp);
					}
				}
			}
		}
	}
}


void LLManipScale::renderGuidelinesPart( const LLBBox& bbox )
{
	LLVector3 guideline_start = bbox.getCenterLocal();

	LLVector3 guideline_end = unitVectorToLocalBBoxExtent( partToUnitVector( mManipPart ), bbox );

	if (!getUniform())
	{
		guideline_start = unitVectorToLocalBBoxExtent( -partToUnitVector( mManipPart ), bbox );
	}

	guideline_end -= guideline_start;
	guideline_end.normalize();
	guideline_end *= LLWorld::getInstance()->getRegionWidthInMeters();
	guideline_end += guideline_start;

	{
		LLGLDepthTest gls_depth(GL_TRUE);
		gl_stippled_line_3d( guideline_start, guideline_end, LLColor4(1.f, 1.f, 1.f, 0.5f) );
	}
	{
		LLGLDepthTest gls_depth(GL_FALSE);
		gl_stippled_line_3d( guideline_start, guideline_end, LLColor4(1.f, 1.f, 1.f, 0.25f) );
	}
}

void LLManipScale::updateSnapGuides(const LLBBox& bbox)
{
	LLVector3 grid_origin;
	LLVector3 grid_scale;
	LLQuaternion grid_rotation;
	LLSelectMgr::getInstance()->getGrid(grid_origin, grid_rotation, grid_scale);

	bool uniform = LLManipScale::getUniform();

	LLVector3 box_corner_agent = bbox.localToAgent(unitVectorToLocalBBoxExtent( partToUnitVector( mManipPart ), bbox ));
	mScaleCenter = uniform ? bbox.getCenterAgent() : bbox.localToAgent(unitVectorToLocalBBoxExtent( -1.f * partToUnitVector( mManipPart ), bbox ));
	mScaleDir = box_corner_agent - mScaleCenter;
	mScaleDir.normalize();

	if(mObjectSelection->getSelectType() == SELECT_TYPE_HUD)
	{
		mSnapRegimeOffset = SNAP_GUIDE_SCREEN_OFFSET / gAgentCamera.mHUDCurZoom;
	}
	else
	{
		F32 object_distance = dist_vec(box_corner_agent, LLViewerCamera::getInstance()->getOrigin());
		mSnapRegimeOffset = (SNAP_GUIDE_SCREEN_OFFSET * gViewerWindow->getWorldViewWidthRaw() * object_distance) / LLViewerCamera::getInstance()->getPixelMeterRatio();
	}
	LLVector3 cam_at_axis;
	F32 snap_guide_length;
	if (mObjectSelection->getSelectType() == SELECT_TYPE_HUD)
	{
		cam_at_axis.set(1.f, 0.f, 0.f);
		snap_guide_length = SNAP_GUIDE_SCREEN_LENGTH / gAgentCamera.mHUDCurZoom;
	}
	else
	{
		cam_at_axis = LLViewerCamera::getInstance()->getAtAxis();
		F32 manipulator_distance = dist_vec(box_corner_agent, LLViewerCamera::getInstance()->getOrigin());
		snap_guide_length = (SNAP_GUIDE_SCREEN_LENGTH * gViewerWindow->getWorldViewWidthRaw() * manipulator_distance) / LLViewerCamera::getInstance()->getPixelMeterRatio();
	}

	mSnapGuideLength = snap_guide_length / llmax(0.1f, (llmin(mSnapGuideDir1 * cam_at_axis, mSnapGuideDir2 * cam_at_axis)));

	LLVector3 off_axis_dir = mScaleDir % cam_at_axis;
	off_axis_dir.normalize();

	if( (LL_FACE_MIN <= (S32)mManipPart) && ((S32)mManipPart <= LL_FACE_MAX) )
	{
		LLVector3 bbox_relative_cam_dir = off_axis_dir * ~bbox.getRotation();
		bbox_relative_cam_dir.abs();
		if (bbox_relative_cam_dir.mV[VX] > bbox_relative_cam_dir.mV[VY] && bbox_relative_cam_dir.mV[VX] > bbox_relative_cam_dir.mV[VZ])
		{
			mSnapGuideDir1 = LLVector3::x_axis * bbox.getRotation();
		}
		else if (bbox_relative_cam_dir.mV[VY] > bbox_relative_cam_dir.mV[VZ])
		{
			mSnapGuideDir1 = LLVector3::y_axis * bbox.getRotation();
		}
		else
		{
			mSnapGuideDir1 = LLVector3::z_axis * bbox.getRotation();
		}

		LLVector3 scale_snap = grid_scale;
		mScaleSnapUnit1 = scale_snap.scaleVec(partToUnitVector( mManipPart )).length();
		mScaleSnapUnit2 = mScaleSnapUnit1;
		mSnapGuideDir1 *= mSnapGuideDir1 * LLViewerCamera::getInstance()->getUpAxis() > 0.f ? 1.f : -1.f;
		mSnapGuideDir2 = mSnapGuideDir1 * -1.f;
		mSnapDir1 = mScaleDir;
		mSnapDir2 = mScaleDir;
	}
	else if( (LL_CORNER_MIN <= (S32)mManipPart) && ((S32)mManipPart <= LL_CORNER_MAX) )
	{
		LLVector3 local_camera_dir;
		if (mObjectSelection->getSelectType() == SELECT_TYPE_HUD)
		{
			local_camera_dir = LLVector3(-1.f, 0.f, 0.f) * ~bbox.getRotation();
		}
		else
		{
			local_camera_dir = (LLViewerCamera::getInstance()->getOrigin() - box_corner_agent) * ~bbox.getRotation();
			local_camera_dir.normalize();
		}

		LLVector3 axis_flip;
		switch (mManipPart)
		{
		case LL_CORNER_NNN:
			axis_flip.set(1.f, 1.f, 1.f);
			break;
		case LL_CORNER_NNP:
			axis_flip.set(1.f, 1.f, -1.f);
			break;
		case LL_CORNER_NPN:
			axis_flip.set(1.f, -1.f, 1.f);
			break;
		case LL_CORNER_NPP:
			axis_flip.set(1.f, -1.f, -1.f);
			break;
		case LL_CORNER_PNN:
			axis_flip.set(-1.f, 1.f, 1.f);
			break;
		case LL_CORNER_PNP:
			axis_flip.set(-1.f, 1.f, -1.f);
			break;
		case LL_CORNER_PPN:
			axis_flip.set(-1.f, -1.f, 1.f);
			break;
		case LL_CORNER_PPP:
			axis_flip.set(-1.f, -1.f, -1.f);
			break;
		default:
			break;
		}

		// account for which side of the object the camera is located and negate appropriate axes
		local_camera_dir.scaleVec(axis_flip);

		// normalize to object scale
		LLVector3 bbox_extent = bbox.getExtentLocal();
		local_camera_dir.scaleVec(LLVector3(1.f / bbox_extent.mV[VX], 1.f / bbox_extent.mV[VY], 1.f / bbox_extent.mV[VZ]));

		S32 scale_face = -1;

		if ((local_camera_dir.mV[VX] > 0.f) == (local_camera_dir.mV[VY] > 0.f))
		{
			if ((local_camera_dir.mV[VZ] > 0.f) == (local_camera_dir.mV[VY] > 0.f))
			{
				LLVector3 local_camera_dir_abs = local_camera_dir;
				local_camera_dir_abs.abs();
				// all neighboring faces of bbox are pointing towards camera or away from camera
				// use largest magnitude face for snap guides
				if (local_camera_dir_abs.mV[VX] > local_camera_dir_abs.mV[VY])
				{
					if (local_camera_dir_abs.mV[VX] > local_camera_dir_abs.mV[VZ])
					{
						scale_face = VX;
					}
					else
					{
						scale_face = VZ;
					}
				}
				else // y > x
				{
					if (local_camera_dir_abs.mV[VY] > local_camera_dir_abs.mV[VZ])
					{
						scale_face = VY;
					}
					else
					{
						scale_face = VZ;
					}
				}
			}
			else
			{
				// z axis facing opposite direction from x and y relative to camera, use x and y for snap guides
				scale_face = VZ;
			}
		}
		else // x and y axes are facing in opposite directions relative to camera
		{
			if ((local_camera_dir.mV[VZ] > 0.f) == (local_camera_dir.mV[VY] > 0.f))
			{
				// x axis facing opposite direction from y and z relative to camera, use y and z for snap guides
				scale_face = VX;
			}
			else
			{
				// y axis facing opposite direction from x and z relative to camera, use x and z for snap guides
				scale_face = VY;
			}
		}

		switch(scale_face)
		{
		case VX:
			// x axis face being scaled, use y and z for snap guides
			mSnapGuideDir1 = LLVector3::y_axis.scaledVec(axis_flip);
			mScaleSnapUnit1 = grid_scale.mV[VZ];
			mSnapGuideDir2 = LLVector3::z_axis.scaledVec(axis_flip);
			mScaleSnapUnit2 = grid_scale.mV[VY];
			break;
		case VY:
			// y axis facing being scaled, use x and z for snap guides
			mSnapGuideDir1 = LLVector3::x_axis.scaledVec(axis_flip);
			mScaleSnapUnit1 = grid_scale.mV[VZ];
			mSnapGuideDir2 = LLVector3::z_axis.scaledVec(axis_flip);
			mScaleSnapUnit2 = grid_scale.mV[VX];
			break;
		case VZ:
			// z axis facing being scaled, use x and y for snap guides
			mSnapGuideDir1 = LLVector3::x_axis.scaledVec(axis_flip);
			mScaleSnapUnit1 = grid_scale.mV[VY];
			mSnapGuideDir2 = LLVector3::y_axis.scaledVec(axis_flip);
			mScaleSnapUnit2 = grid_scale.mV[VX];
			break;
		default:
			mSnapGuideDir1.setZero();
			mScaleSnapUnit1 = 0.f;

			mSnapGuideDir2.setZero();
			mScaleSnapUnit2 = 0.f;
			break;
		}

		mSnapGuideDir1.rotVec(bbox.getRotation());
		mSnapGuideDir2.rotVec(bbox.getRotation());
		mSnapDir1 = -1.f * mSnapGuideDir2;
		mSnapDir2 = -1.f * mSnapGuideDir1;
	}

	mScalePlaneNormal1 = mSnapGuideDir1 % mScaleDir;
	mScalePlaneNormal1.normalize();

	mScalePlaneNormal2 = mSnapGuideDir2 % mScaleDir;
	mScalePlaneNormal2.normalize();

	mScaleSnapUnit1 = mScaleSnapUnit1 / (mSnapDir1 * mScaleDir);
	mScaleSnapUnit2 = mScaleSnapUnit2 / (mSnapDir2 * mScaleDir);

	mTickPixelSpacing1 = ll_round((F32)MIN_DIVISION_PIXEL_WIDTH / (mScaleDir % mSnapGuideDir1).length());
	mTickPixelSpacing2 = ll_round((F32)MIN_DIVISION_PIXEL_WIDTH / (mScaleDir % mSnapGuideDir2).length());

	if (uniform)
	{
		mScaleSnapUnit1 *= 0.5f;
		mScaleSnapUnit2 *= 0.5f;
	}
}

void LLManipScale::renderSnapGuides(const LLBBox& bbox)
{
	if (!gSavedSettings.getBOOL("SnapEnabled"))
	{
		return;
	}

	F32 grid_alpha = gSavedSettings.getF32("GridOpacity");

	F32 max_point_on_scale_line = partToMaxScale(mManipPart, bbox);
	LLVector3 drag_point = gAgent.getPosAgentFromGlobal(mDragPointGlobal);

	updateGridSettings();

	S32 pass;
	for (pass = 0; pass < 3; pass++)
	{
		LLColor4 tick_color = setupSnapGuideRenderPass(pass);

		gGL.begin(LLRender::LINES);
		LLVector3 line_mid = mScaleCenter + (mScaleSnappedValue * mScaleDir) + (mSnapGuideDir1 * mSnapRegimeOffset);
		LLVector3 line_start = line_mid - (mScaleDir * (llmin(mScaleSnappedValue, mSnapGuideLength * 0.5f)));
		LLVector3 line_end = line_mid + (mScaleDir * llmin(max_point_on_scale_line - mScaleSnappedValue, mSnapGuideLength * 0.5f));

		gGL.color4f(tick_color.mV[VRED], tick_color.mV[VGREEN], tick_color.mV[VBLUE], tick_color.mV[VALPHA] * 0.1f);
		gGL.vertex3fv(line_start.mV);
		gGL.color4fv(tick_color.mV);
		gGL.vertex3fv(line_mid.mV);
		gGL.vertex3fv(line_mid.mV);
		gGL.color4f(tick_color.mV[VRED], tick_color.mV[VGREEN], tick_color.mV[VBLUE], tick_color.mV[VALPHA] * 0.1f);
		gGL.vertex3fv(line_end.mV);

		line_mid = mScaleCenter + (mScaleSnappedValue * mScaleDir) + (mSnapGuideDir2 * mSnapRegimeOffset);
		line_start = line_mid - (mScaleDir * (llmin(mScaleSnappedValue, mSnapGuideLength * 0.5f)));
		line_end = line_mid + (mScaleDir * llmin(max_point_on_scale_line - mScaleSnappedValue, mSnapGuideLength * 0.5f));
		gGL.vertex3fv(line_start.mV);
		gGL.color4fv(tick_color.mV);
		gGL.vertex3fv(line_mid.mV);
		gGL.vertex3fv(line_mid.mV);
		gGL.color4f(tick_color.mV[VRED], tick_color.mV[VGREEN], tick_color.mV[VBLUE], tick_color.mV[VALPHA] * 0.1f);
		gGL.vertex3fv(line_end.mV);
		gGL.end();
	}

	{
		LLGLDepthTest gls_depth(GL_FALSE);

		F32 dist_grid_axis = llmax(0.f, (drag_point - mScaleCenter) * mScaleDir);
		
		F32 smallest_subdivision1 = mScaleSnapUnit1 / sGridMaxSubdivisionLevel;
		F32 smallest_subdivision2 = mScaleSnapUnit2 / sGridMaxSubdivisionLevel;
		
		F32 dist_scale_units_1 = dist_grid_axis / smallest_subdivision1;
		F32 dist_scale_units_2 = dist_grid_axis / smallest_subdivision2;
		
		// find distance to nearest smallest grid unit
		F32 grid_multiple1 = llfloor(dist_scale_units_1);
		F32 grid_multiple2 = llfloor(dist_scale_units_2);
		F32 grid_offset1 = fmodf(dist_grid_axis, smallest_subdivision1);
		F32 grid_offset2 = fmodf(dist_grid_axis, smallest_subdivision2);

		// how many smallest grid units are we away from largest grid scale?
		S32 sub_div_offset_1 = ll_round(fmod(dist_grid_axis - grid_offset1, mScaleSnapUnit1 / sGridMinSubdivisionLevel) / smallest_subdivision1);
		S32 sub_div_offset_2 = ll_round(fmod(dist_grid_axis - grid_offset2, mScaleSnapUnit2 / sGridMinSubdivisionLevel) / smallest_subdivision2);

		S32 num_ticks_per_side1 = llmax(1, lltrunc(0.5f * mSnapGuideLength / smallest_subdivision1));
		S32 num_ticks_per_side2 = llmax(1, lltrunc(0.5f * mSnapGuideLength / smallest_subdivision2));
		S32 ticks_from_scale_center_1 = lltrunc(dist_scale_units_1);
		S32 ticks_from_scale_center_2 = lltrunc(dist_scale_units_2);
		S32 max_ticks1 = llceil(max_point_on_scale_line / smallest_subdivision1 - dist_scale_units_1);
		S32 max_ticks2 = llceil(max_point_on_scale_line / smallest_subdivision2 - dist_scale_units_2);
		S32 start_tick = 0;
		S32 stop_tick = 0;

		if (mSnapRegime != SNAP_REGIME_NONE)
		{
			// draw snap guide line
			gGL.begin(LLRender::LINES);
			LLVector3 snap_line_center = bbox.localToAgent(unitVectorToLocalBBoxExtent( partToUnitVector( mManipPart ), bbox ));

			LLVector3 snap_line_start = snap_line_center + (mSnapGuideDir1 * mSnapRegimeOffset);
			LLVector3 snap_line_end = snap_line_center + (mSnapGuideDir2 * mSnapRegimeOffset);

			gGL.color4f(1.f, 1.f, 1.f, grid_alpha);
			gGL.vertex3fv(snap_line_start.mV);
			gGL.vertex3fv(snap_line_center.mV);
			gGL.vertex3fv(snap_line_center.mV);
			gGL.vertex3fv(snap_line_end.mV);
			gGL.end();

			// draw snap guide arrow
			gGL.begin(LLRender::TRIANGLES);
			{
				//gGLSNoCullFaces.set();
				gGL.color4f(1.f, 1.f, 1.f, grid_alpha);

				LLVector3 arrow_dir;
				LLVector3 arrow_span = mScaleDir;

				arrow_dir = snap_line_start - snap_line_center;
				arrow_dir.normalize();
				gGL.vertex3fv((snap_line_start + arrow_dir * mSnapRegimeOffset * 0.1f).mV);
				gGL.vertex3fv((snap_line_start + arrow_span * mSnapRegimeOffset * 0.1f).mV);
				gGL.vertex3fv((snap_line_start - arrow_span * mSnapRegimeOffset * 0.1f).mV);

				arrow_dir = snap_line_end - snap_line_center;
				arrow_dir.normalize();
				gGL.vertex3fv((snap_line_end + arrow_dir * mSnapRegimeOffset * 0.1f).mV);
				gGL.vertex3fv((snap_line_end + arrow_span * mSnapRegimeOffset * 0.1f).mV);
				gGL.vertex3fv((snap_line_end - arrow_span * mSnapRegimeOffset * 0.1f).mV);
			}
			gGL.end();
		}

		LLVector2 screen_translate_axis(llabs(mScaleDir * LLViewerCamera::getInstance()->getLeftAxis()), llabs(mScaleDir * LLViewerCamera::getInstance()->getUpAxis()));
		screen_translate_axis.normalize();

		S32 tick_label_spacing = ll_round(screen_translate_axis * sTickLabelSpacing);

		for (pass = 0; pass < 3; pass++)
		{
			LLColor4 tick_color = setupSnapGuideRenderPass(pass);

			start_tick = -(llmin(ticks_from_scale_center_1, num_ticks_per_side1));
			stop_tick = llmin(max_ticks1, num_ticks_per_side1);

			gGL.begin(LLRender::LINES);
			// draw first row of ticks
			for (S32 i = start_tick; i <= stop_tick; i++)
			{
				F32 alpha = (1.f - (1.f *  ((F32)llabs(i) / (F32)num_ticks_per_side1)));
				LLVector3 tick_pos = mScaleCenter + (mScaleDir * (grid_multiple1 + i) * smallest_subdivision1);

				//No need check this condition to prevent tick position scaling (FIX MAINT-5207/5208)
				//F32 cur_subdivisions = llclamp(getSubdivisionLevel(tick_pos, mScaleDir, mScaleSnapUnit1, mTickPixelSpacing1), sGridMinSubdivisionLevel, sGridMaxSubdivisionLevel);
				/*if (fmodf((F32)(i + sub_div_offset_1), (sGridMaxSubdivisionLevel / cur_subdivisions)) != 0.f)
				{
					continue;
				}*/

				F32 tick_scale = 1.f;
				for (F32 division_level = sGridMaxSubdivisionLevel; division_level >= sGridMinSubdivisionLevel; division_level /= 2.f)
				{
					if (fmodf((F32)(i + sub_div_offset_1), division_level) == 0.f)
					{
						break;
					}
					tick_scale *= 0.7f;
				}

				gGL.color4f(tick_color.mV[VRED], tick_color.mV[VGREEN], tick_color.mV[VBLUE], tick_color.mV[VALPHA] * alpha);
				LLVector3 tick_start = tick_pos + (mSnapGuideDir1 * mSnapRegimeOffset);
				LLVector3 tick_end = tick_start + (mSnapGuideDir1 * mSnapRegimeOffset * tick_scale);
				gGL.vertex3fv(tick_start.mV);
				gGL.vertex3fv(tick_end.mV);
			}

			// draw opposite row of ticks
			start_tick = -(llmin(ticks_from_scale_center_2, num_ticks_per_side2));
			stop_tick = llmin(max_ticks2, num_ticks_per_side2);

			for (S32 i = start_tick; i <= stop_tick; i++)
			{
				F32 alpha = (1.f - (1.f *  ((F32)llabs(i) / (F32)num_ticks_per_side2)));
				LLVector3 tick_pos = mScaleCenter + (mScaleDir * (grid_multiple2 + i) * smallest_subdivision2);
				
				//No need check this condition to prevent tick position scaling (FIX MAINT-5207/5208)
				//F32 cur_subdivisions = llclamp(getSubdivisionLevel(tick_pos, mScaleDir, mScaleSnapUnit2, mTickPixelSpacing2), sGridMinSubdivisionLevel, sGridMaxSubdivisionLevel);
				/*if (fmodf((F32)(i + sub_div_offset_2), (sGridMaxSubdivisionLevel / cur_subdivisions)) != 0.f)
				{
					continue;
				}*/

				F32 tick_scale = 1.f;
				for (F32 division_level = sGridMaxSubdivisionLevel; division_level >= sGridMinSubdivisionLevel; division_level /= 2.f)
				{
					if (fmodf((F32)(i + sub_div_offset_2), division_level) == 0.f)
					{
						break;
					}
					tick_scale *= 0.7f;
				}

				gGL.color4f(tick_color.mV[VRED], tick_color.mV[VGREEN], tick_color.mV[VBLUE], tick_color.mV[VALPHA] * alpha);
				LLVector3 tick_start = tick_pos + (mSnapGuideDir2 * mSnapRegimeOffset);
				LLVector3 tick_end = tick_start + (mSnapGuideDir2 * mSnapRegimeOffset * tick_scale);
				gGL.vertex3fv(tick_start.mV);
				gGL.vertex3fv(tick_end.mV);
			}
			gGL.end();
		}

		// render upper tick labels
		start_tick = -(llmin(ticks_from_scale_center_1, num_ticks_per_side1));
		stop_tick = llmin(max_ticks1, num_ticks_per_side1);

		F32 grid_resolution = mObjectSelection->getSelectType() == SELECT_TYPE_HUD ? 0.25f : llmax(gSavedSettings.getF32("GridResolution"), 0.001f);
		S32 label_sub_div_offset_1 = ll_round(fmod(dist_grid_axis - grid_offset1, mScaleSnapUnit1  * 32.f) / smallest_subdivision1);
		S32 label_sub_div_offset_2 = ll_round(fmod(dist_grid_axis - grid_offset2, mScaleSnapUnit2  * 32.f) / smallest_subdivision2);

		for (S32 i = start_tick; i <= stop_tick; i++)
		{
			F32 tick_scale = 1.f;
			F32 alpha = grid_alpha * (1.f - (0.5f *  ((F32)llabs(i) / (F32)num_ticks_per_side1)));
			LLVector3 tick_pos = mScaleCenter + (mScaleDir * (grid_multiple1 + i) * smallest_subdivision1);

			for (F32 division_level = sGridMaxSubdivisionLevel; division_level >= sGridMinSubdivisionLevel; division_level /= 2.f)
			{
				if (fmodf((F32)(i + label_sub_div_offset_1), division_level) == 0.f)
				{
					break;
				}
				tick_scale *= 0.7f;
			}

			if (fmodf((F32)(i + label_sub_div_offset_1), (sGridMaxSubdivisionLevel / llmin(sGridMaxSubdivisionLevel, getSubdivisionLevel(tick_pos, mScaleDir, mScaleSnapUnit1, tick_label_spacing)))) == 0.f)
			{
				LLVector3 text_origin = tick_pos + (mSnapGuideDir1 * mSnapRegimeOffset * (1.f + tick_scale));
				
				EGridMode grid_mode = LLSelectMgr::getInstance()->getGridMode();
				F32 tick_value;
				if (grid_mode == GRID_MODE_WORLD)
				{
					tick_value = (grid_multiple1 + i) / (sGridMaxSubdivisionLevel / grid_resolution);
				}
				else
				{
					tick_value = (grid_multiple1 + i) / (2.f * sGridMaxSubdivisionLevel);
				}

				F32 text_highlight = 0.8f;

				// Highlight this text if the tick value matches the snapped to value, and if either the second set of ticks isn't going to be shown or cursor is in the first snap regime.
				if (is_approx_equal(tick_value, mScaleSnappedValue) && (mScaleSnapUnit2 == mScaleSnapUnit1 || (mSnapRegime & SNAP_REGIME_UPPER)))
				{
					text_highlight = 1.f;
				}

				renderTickValue(text_origin, tick_value, grid_mode == GRID_MODE_WORLD ? std::string("m") : std::string("x"), LLColor4(text_highlight, text_highlight, text_highlight, alpha));
			}
		}

		// label ticks on opposite side, only can happen in scaling modes that effect more than one axis and when the object's axis don't have the same scale.  A differing scale indicates both conditions.
		if (mScaleSnapUnit2 != mScaleSnapUnit1)
		{
			start_tick = -(llmin(ticks_from_scale_center_2, num_ticks_per_side2));
			stop_tick = llmin(max_ticks2, num_ticks_per_side2);
			for (S32 i = start_tick; i <= stop_tick; i++)
			{
				F32 tick_scale = 1.f;
				F32 alpha = grid_alpha * (1.f - (0.5f *  ((F32)llabs(i) / (F32)num_ticks_per_side2)));
				LLVector3 tick_pos = mScaleCenter + (mScaleDir * (grid_multiple2 + i) * smallest_subdivision2);

				for (F32 division_level = sGridMaxSubdivisionLevel; division_level >= sGridMinSubdivisionLevel; division_level /= 2.f)
				{
					if (fmodf((F32)(i + label_sub_div_offset_2), division_level) == 0.f)
					{
						break;
					}
					tick_scale *= 0.7f;
				}

				if (fmodf((F32)(i + label_sub_div_offset_2), (sGridMaxSubdivisionLevel / llmin(sGridMaxSubdivisionLevel, getSubdivisionLevel(tick_pos, mScaleDir, mScaleSnapUnit2, tick_label_spacing)))) == 0.f)
				{
					LLVector3 text_origin = tick_pos + (mSnapGuideDir2 * mSnapRegimeOffset * (1.f + tick_scale));

					EGridMode grid_mode = LLSelectMgr::getInstance()->getGridMode();
					F32 tick_value;
					if (grid_mode == GRID_MODE_WORLD)
					{
						tick_value = (grid_multiple2 + i) / (sGridMaxSubdivisionLevel / grid_resolution);
					}
					else
					{
						tick_value = (grid_multiple2 + i) / (2.f * sGridMaxSubdivisionLevel);
					}

					F32 text_highlight = 0.8f;

					if (is_approx_equal(tick_value, mScaleSnappedValue) && (mSnapRegime & SNAP_REGIME_LOWER))
					{
						text_highlight = 1.f;
					}

					renderTickValue(text_origin, tick_value, grid_mode == GRID_MODE_WORLD ? std::string("m") : std::string("x"), LLColor4(text_highlight, text_highlight, text_highlight, alpha));
				}
			}
		}


		// render help text
		if (mObjectSelection->getSelectType() != SELECT_TYPE_HUD)
		{
			if (mHelpTextTimer.getElapsedTimeF32() < sHelpTextVisibleTime + sHelpTextFadeTime && sNumTimesHelpTextShown < sMaxTimesShowHelpText)
			{
				LLVector3 selection_center_start = LLSelectMgr::getInstance()->getSavedBBoxOfSelection().getCenterAgent();

				LLVector3 offset_dir;
				if (mSnapGuideDir1 * LLViewerCamera::getInstance()->getAtAxis() > mSnapGuideDir2 * LLViewerCamera::getInstance()->getAtAxis())
				{
					offset_dir = mSnapGuideDir2;
				}
				else
				{
					offset_dir = mSnapGuideDir1;
				}

				LLVector3 help_text_pos = selection_center_start + (mSnapRegimeOffset * 5.f * offset_dir);
				const LLFontGL* big_fontp = LLFontGL::getFontSansSerif();

				std::string help_text = LLTrans::getString("manip_hint1");
				LLColor4 help_text_color = LLColor4::white;
				help_text_color.mV[VALPHA] = clamp_rescale(mHelpTextTimer.getElapsedTimeF32(), sHelpTextVisibleTime, sHelpTextVisibleTime + sHelpTextFadeTime, grid_alpha, 0.f);
				hud_render_utf8text(help_text, help_text_pos, *big_fontp, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, -0.5f * big_fontp->getWidthF32(help_text), 3.f, help_text_color, false);
				help_text = LLTrans::getString("manip_hint2");
				help_text_pos -= LLViewerCamera::getInstance()->getUpAxis() * mSnapRegimeOffset * 0.4f;
				hud_render_utf8text(help_text, help_text_pos, *big_fontp, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, -0.5f * big_fontp->getWidthF32(help_text), 3.f, help_text_color, false);
			}
		}
	}
}

// Returns unit vector in direction of part of an origin-centered cube
LLVector3 LLManipScale::partToUnitVector( S32 part ) const
{
	if ( (LL_FACE_MIN <= part) && (part <= LL_FACE_MAX) )
	{
		return faceToUnitVector( part );
	}
	else if ( (LL_CORNER_MIN <= part) && (part <= LL_CORNER_MAX) )
	{
		return cornerToUnitVector( part );
	}
	else if ( (LL_EDGE_MIN <= part) && (part <= LL_EDGE_MAX ) )
	{
		return edgeToUnitVector( part );
	}
	return LLVector3();
}


// Returns unit vector in direction of face of an origin-centered cube
LLVector3 LLManipScale::faceToUnitVector( S32 part ) const
{
	llassert( (LL_FACE_MIN <= part) && (part <= LL_FACE_MAX) );
	LLVector3 vec;
	switch( part )
	{
		case LL_FACE_POSX:
			vec.set(  1.f,  0.f,  0.f );
			break;
		case LL_FACE_NEGX:
			vec.set( -1.f,  0.f,  0.f );
			break;
		case LL_FACE_POSY:
			vec.set(  0.f,  1.f,  0.f );
			break;
		case LL_FACE_NEGY:
			vec.set(  0.f, -1.f,  0.f );
			break;
		case LL_FACE_POSZ:
			vec.set(  0.f,  0.f,  1.f );
			break;
		case LL_FACE_NEGZ:
			vec.set(  0.f,  0.f, -1.f );
			break;
		default:
			vec.clear();
	}

	return vec;
}


// Returns unit vector in direction of corner of an origin-centered cube
LLVector3 LLManipScale::cornerToUnitVector( S32 part ) const
{
	llassert( (LL_CORNER_MIN <= part) && (part <= LL_CORNER_MAX) );
	LLVector3 vec;
	switch(part)
	{
		case LL_CORNER_NNN:
			vec.set(-OO_SQRT3, -OO_SQRT3, -OO_SQRT3);
			break;
		case LL_CORNER_NNP:
			vec.set(-OO_SQRT3, -OO_SQRT3, OO_SQRT3);
			break;
		case LL_CORNER_NPN:
			vec.set(-OO_SQRT3, OO_SQRT3, -OO_SQRT3);
			break;
		case LL_CORNER_NPP:
			vec.set(-OO_SQRT3, OO_SQRT3, OO_SQRT3);
			break;
		case LL_CORNER_PNN:
			vec.set(OO_SQRT3, -OO_SQRT3, -OO_SQRT3);
			break;
		case LL_CORNER_PNP:
			vec.set(OO_SQRT3, -OO_SQRT3, OO_SQRT3);
			break;
		case LL_CORNER_PPN:
			vec.set(OO_SQRT3, OO_SQRT3, -OO_SQRT3);
			break;
		case LL_CORNER_PPP:
			vec.set(OO_SQRT3, OO_SQRT3, OO_SQRT3);
			break;
		default:
			vec.clear();
	}

	return vec;
}

// Returns unit vector in direction of edge of an origin-centered cube
LLVector3 LLManipScale::edgeToUnitVector( S32 part ) const
{
	llassert( (LL_EDGE_MIN <= part) && (part <= LL_EDGE_MAX) );
	part -= LL_EDGE_MIN;
	S32 rotation = part >> 2;				// Edge between which faces: 0 => XY, 1 => YZ, 2 => ZX
	LLVector3 v;
	v.mV[rotation]			= (part & 1) ? F_SQRT2 : -F_SQRT2;
	v.mV[(rotation+1) % 3]	= (part & 2) ? F_SQRT2 : -F_SQRT2;
	// v.mV[(rotation+2) % 3] defaults to 0.
	return v;
}

// Non-linear scale of origin-centered unit cube to non-origin-centered, non-symetrical bounding box
LLVector3 LLManipScale::unitVectorToLocalBBoxExtent( const LLVector3& v, const LLBBox& bbox ) const
{
	const LLVector3& min = bbox.getMinLocal();
	const LLVector3& max = bbox.getMaxLocal();
	LLVector3 ctr = bbox.getCenterLocal();

	return LLVector3(
		v.mV[0] ? (v.mV[0]>0 ? max.mV[0] : min.mV[0] ) : ctr.mV[0],
		v.mV[1] ? (v.mV[1]>0 ? max.mV[1] : min.mV[1] ) : ctr.mV[1],
		v.mV[2] ? (v.mV[2]>0 ? max.mV[2] : min.mV[2] ) : ctr.mV[2] );
}

// returns max allowable scale along a given stretch axis
F32		LLManipScale::partToMaxScale( S32 part, const LLBBox &bbox ) const
{
	F32 max_scale_factor = 0.f;
	LLVector3 bbox_extents = unitVectorToLocalBBoxExtent( partToUnitVector( part ), bbox );
	bbox_extents.abs();
	F32 max_extent = 0.f;
	for (U32 i = VX; i <= VZ; i++)
	{
		if (bbox_extents.mV[i] > max_extent)
		{
			max_extent = bbox_extents.mV[i];
		}
	}
	max_scale_factor = bbox_extents.length() * get_default_max_prim_scale() / max_extent;

	if (getUniform())
	{
		max_scale_factor *= 0.5f;
	}

	return max_scale_factor;
}

// returns min allowable scale along a given stretch axis
F32		LLManipScale::partToMinScale( S32 part, const LLBBox &bbox ) const
{
	LLVector3 bbox_extents = unitVectorToLocalBBoxExtent( partToUnitVector( part ), bbox );
	bbox_extents.abs();
	F32 min_extent = get_default_max_prim_scale();
	for (U32 i = VX; i <= VZ; i++)
	{
		if (bbox_extents.mV[i] > 0.f && bbox_extents.mV[i] < min_extent)
		{
			min_extent = bbox_extents.mV[i];
		}
	}
	F32 min_scale_factor = bbox_extents.length() * MIN_PRIM_SCALE / min_extent;

	if (getUniform())
	{
		min_scale_factor *= 0.5f;
	}

	return min_scale_factor;
}

// Returns the axis aligned unit vector closest to v.
LLVector3 LLManipScale::nearestAxis( const LLVector3& v ) const
{
	// Note: yes, this is a slow but easy implementation
	// assumes v is normalized

	F32 coords[][3] =
		{
			{ 1.f, 0.f, 0.f },
			{ 0.f, 1.f, 0.f },
			{ 0.f, 0.f, 1.f },
			{-1.f, 0.f, 0.f },
			{ 0.f,-1.f, 0.f },
			{ 0.f, 0.f,-1.f }
		};

	F32 cosine[6];
	cosine[0] = v * LLVector3( coords[0] );
	cosine[1] = v * LLVector3( coords[1] );
	cosine[2] = v * LLVector3( coords[2] );
	cosine[3] = -cosine[0];
	cosine[4] = -cosine[1];
	cosine[5] = -cosine[2];

	F32 greatest_cos = cosine[0];
	S32 greatest_index = 0;
	for( S32 i=1; i<6; i++ )
	{
		if( greatest_cos < cosine[i] )
		{
			greatest_cos = cosine[i];
			greatest_index = i;
		}
	}

	return LLVector3( coords[greatest_index] );
}

// virtual
BOOL LLManipScale::canAffectSelection()
{
	// An selection is scalable if you are allowed to both edit and move
	// everything in it, and it does not have any sitting agents
	BOOL can_scale = mObjectSelection->getObjectCount() != 0;
	if (can_scale)
	{
		struct f : public LLSelectedObjectFunctor
		{
			virtual bool apply(LLViewerObject* objectp)
			{
				LLViewerObject *root_object = (objectp == NULL) ? NULL : objectp->getRootEdit();
				return objectp->permModify() && objectp->permMove() && !objectp->isPermanentEnforced() &&
					(root_object == NULL || (!root_object->isPermanentEnforced() && !root_object->isSeat())) &&
					!objectp->isSeat();
			}
		} func;
		can_scale = mObjectSelection->applyToObjects(&func);
	}
	return can_scale;
}