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
|
/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2009 Blender Foundation, Joshua Leung
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Joshua Leung (full recode)
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/nla.c
* \ingroup bke
*/
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <float.h>
#include "MEM_guardedalloc.h"
#include "BLI_utildefines.h"
#include "BLI_path_util.h"
#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_ghash.h"
#include "DNA_anim_types.h"
#include "DNA_scene_types.h"
#include "DNA_sound_types.h"
#include "DNA_speaker_types.h"
#include "BKE_action.h"
#include "BKE_fcurve.h"
#include "BKE_nla.h"
#include "BKE_global.h"
#include "BKE_library.h"
#ifdef WITH_AUDASPACE
# include "AUD_C-API.h"
#endif
#include "RNA_access.h"
#include "nla_private.h"
/* *************************************************** */
/* Data Management */
/* Freeing ------------------------------------------- */
/* Remove the given NLA strip from the NLA track it occupies, free the strip's data,
* and the strip itself.
*/
void free_nlastrip (ListBase *strips, NlaStrip *strip)
{
NlaStrip *cs, *csn;
/* sanity checks */
if (strip == NULL)
return;
/* free child-strips */
for (cs= strip->strips.first; cs; cs= csn) {
csn= cs->next;
free_nlastrip(&strip->strips, cs);
}
/* remove reference to action */
if (strip->act)
id_us_min(&strip->act->id);
/* free remapping info */
//if (strip->remap)
// BKE_animremap_free();
/* free own F-Curves */
free_fcurves(&strip->fcurves);
/* free own F-Modifiers */
free_fmodifiers(&strip->modifiers);
/* free the strip itself */
if (strips)
BLI_freelinkN(strips, strip);
else
MEM_freeN(strip);
}
/* Remove the given NLA track from the set of NLA tracks, free the track's data,
* and the track itself.
*/
void free_nlatrack (ListBase *tracks, NlaTrack *nlt)
{
NlaStrip *strip, *stripn;
/* sanity checks */
if (nlt == NULL)
return;
/* free strips */
for (strip= nlt->strips.first; strip; strip= stripn) {
stripn= strip->next;
free_nlastrip(&nlt->strips, strip);
}
/* free NLA track itself now */
if (tracks)
BLI_freelinkN(tracks, nlt);
else
MEM_freeN(nlt);
}
/* Free the elements of type NLA Tracks provided in the given list, but do not free
* the list itself since that is not free-standing
*/
void free_nladata (ListBase *tracks)
{
NlaTrack *nlt, *nltn;
/* sanity checks */
if ELEM(NULL, tracks, tracks->first)
return;
/* free tracks one by one */
for (nlt= tracks->first; nlt; nlt= nltn) {
nltn= nlt->next;
free_nlatrack(tracks, nlt);
}
/* clear the list's pointers to be safe */
tracks->first= tracks->last= NULL;
}
/* Copying ------------------------------------------- */
/* Copy NLA strip */
NlaStrip *copy_nlastrip (NlaStrip *strip)
{
NlaStrip *strip_d;
NlaStrip *cs, *cs_d;
/* sanity check */
if (strip == NULL)
return NULL;
/* make a copy */
strip_d= MEM_dupallocN(strip);
strip_d->next= strip_d->prev= NULL;
/* increase user-count of action */
if (strip_d->act)
id_us_plus(&strip_d->act->id);
/* copy F-Curves and modifiers */
copy_fcurves(&strip_d->fcurves, &strip->fcurves);
copy_fmodifiers(&strip_d->modifiers, &strip->modifiers);
/* make a copy of all the child-strips, one at a time */
strip_d->strips.first= strip_d->strips.last= NULL;
for (cs= strip->strips.first; cs; cs= cs->next) {
cs_d= copy_nlastrip(cs);
BLI_addtail(&strip_d->strips, cs_d);
}
/* return the strip */
return strip_d;
}
/* Copy NLA Track */
NlaTrack *copy_nlatrack (NlaTrack *nlt)
{
NlaStrip *strip, *strip_d;
NlaTrack *nlt_d;
/* sanity check */
if (nlt == NULL)
return NULL;
/* make a copy */
nlt_d= MEM_dupallocN(nlt);
nlt_d->next= nlt_d->prev= NULL;
/* make a copy of all the strips, one at a time */
nlt_d->strips.first= nlt_d->strips.last= NULL;
for (strip= nlt->strips.first; strip; strip= strip->next) {
strip_d= copy_nlastrip(strip);
BLI_addtail(&nlt_d->strips, strip_d);
}
/* return the copy */
return nlt_d;
}
/* Copy all NLA data */
void copy_nladata (ListBase *dst, ListBase *src)
{
NlaTrack *nlt, *nlt_d;
/* sanity checks */
if ELEM(NULL, dst, src)
return;
/* clear out the destination list first for precautions... */
dst->first= dst->last= NULL;
/* copy each NLA-track, one at a time */
for (nlt= src->first; nlt; nlt= nlt->next) {
/* make a copy, and add the copy to the destination list */
nlt_d= copy_nlatrack(nlt);
BLI_addtail(dst, nlt_d);
}
}
/* Adding ------------------------------------------- */
/* Add a NLA Track to the given AnimData
* - prev: NLA-Track to add the new one after
*/
NlaTrack *add_nlatrack (AnimData *adt, NlaTrack *prev)
{
NlaTrack *nlt;
/* sanity checks */
if (adt == NULL)
return NULL;
/* allocate new track */
nlt= MEM_callocN(sizeof(NlaTrack), "NlaTrack");
/* set settings requiring the track to not be part of the stack yet */
nlt->flag = NLATRACK_SELECTED;
nlt->index= BLI_countlist(&adt->nla_tracks);
/* add track to stack, and make it the active one */
if (prev)
BLI_insertlinkafter(&adt->nla_tracks, prev, nlt);
else
BLI_addtail(&adt->nla_tracks, nlt);
BKE_nlatrack_set_active(&adt->nla_tracks, nlt);
/* must have unique name, but we need to seed this */
strcpy(nlt->name, "NlaTrack");
BLI_uniquename(&adt->nla_tracks, nlt, "NlaTrack", '.', offsetof(NlaTrack, name), sizeof(nlt->name));
/* return the new track */
return nlt;
}
/* Add a NLA Strip referencing the given Action */
NlaStrip *add_nlastrip (bAction *act)
{
NlaStrip *strip;
/* sanity checks */
if (act == NULL)
return NULL;
/* allocate new strip */
strip= MEM_callocN(sizeof(NlaStrip), "NlaStrip");
/* generic settings
* - selected flag to highlight this to the user
* - auto-blends to ensure that blend in/out values are automatically
* determined by overlaps of strips
* - (XXX) synchronization of strip-length in accordance with changes to action-length
* is not done though, since this should only really happens in editmode for strips now
* though this decision is still subject to further review...
*/
strip->flag = NLASTRIP_FLAG_SELECT|NLASTRIP_FLAG_AUTO_BLENDS;
/* assign the action reference */
strip->act= act;
id_us_plus(&act->id);
/* determine initial range
* - strip length cannot be 0... ever...
*/
calc_action_range(strip->act, &strip->actstart, &strip->actend, 0);
strip->start = strip->actstart;
strip->end = (IS_EQF(strip->actstart, strip->actend)) ? (strip->actstart + 1.0f): (strip->actend);
/* strip should be referenced as-is */
strip->scale= 1.0f;
strip->repeat = 1.0f;
/* return the new strip */
return strip;
}
/* Add new NLA-strip to the top of the NLA stack - i.e. into the last track if space, or a new one otherwise */
NlaStrip *add_nlastrip_to_stack (AnimData *adt, bAction *act)
{
NlaStrip *strip;
NlaTrack *nlt;
/* sanity checks */
if ELEM(NULL, adt, act)
return NULL;
/* create a new NLA strip */
strip= add_nlastrip(act);
if (strip == NULL)
return NULL;
/* firstly try adding strip to last track, but if that fails, add to a new track */
if (BKE_nlatrack_add_strip(adt->nla_tracks.last, strip) == 0) {
/* trying to add to the last track failed (no track or no space),
* so add a new track to the stack, and add to that...
*/
nlt= add_nlatrack(adt, NULL);
BKE_nlatrack_add_strip(nlt, strip);
}
/* automatically name it too */
BKE_nlastrip_validate_name(adt, strip);
/* returns the strip added */
return strip;
}
/* Add a NLA Strip referencing the given speaker's sound */
NlaStrip *add_nla_soundstrip (Scene *scene, Speaker *speaker)
{
NlaStrip *strip = MEM_callocN(sizeof(NlaStrip), "NlaSoundStrip");
/* if speaker has a sound, set the strip length to the length of the sound,
* otherwise default to length of 10 frames
*/
#ifdef WITH_AUDASPACE
if (speaker->sound)
{
AUD_SoundInfo info = AUD_getInfo(speaker->sound->playback_handle);
strip->end = (float)ceil((double)info.length * FPS);
}
else
#endif
{
strip->end = 10.0f;
/* quiet compiler warnings */
(void)scene;
(void)speaker;
}
/* general settings */
strip->type = NLASTRIP_TYPE_SOUND;
strip->flag = NLASTRIP_FLAG_SELECT;
strip->extendmode = NLASTRIP_EXTEND_NOTHING; /* nothing to extend... */
/* strip should be referenced as-is */
strip->scale= 1.0f;
strip->repeat = 1.0f;
/* return this strip */
return strip;
}
/* *************************************************** */
/* NLA Evaluation <-> Editing Stuff */
/* Strip Mapping ------------------------------------- */
/* non clipped mapping for strip-time <-> global time (for Action-Clips)
* invert = convert action-strip time to global time
*/
static float nlastrip_get_frame_actionclip (NlaStrip *strip, float cframe, short mode)
{
float actlength, scale;
// float repeat; // UNUSED
/* get number of repeats */
if (IS_EQF(strip->repeat, 0.0f)) strip->repeat = 1.0f;
// repeat = strip->repeat; // UNUSED
/* scaling */
if (IS_EQF(strip->scale, 0.0f)) strip->scale= 1.0f;
scale = fabsf(strip->scale); /* scale must be positive - we've got a special flag for reversing */
/* length of referenced action */
actlength = strip->actend - strip->actstart;
if (IS_EQF(actlength, 0.0f)) actlength = 1.0f;
/* reversed = play strip backwards */
if (strip->flag & NLASTRIP_FLAG_REVERSE) {
// FIXME: this won't work right with Graph Editor?
if (mode == NLATIME_CONVERT_MAP) {
return strip->end - scale*(cframe - strip->actstart);
}
else if (mode == NLATIME_CONVERT_UNMAP) {
return (strip->end + (strip->actstart * scale - cframe)) / scale;
}
else /* if (mode == NLATIME_CONVERT_EVAL) */{
if (IS_EQF(cframe, strip->end) && IS_EQF(strip->repeat, ((int)strip->repeat))) {
/* this case prevents the motion snapping back to the first frame at the end of the strip
* by catching the case where repeats is a whole number, which means that the end of the strip
* could also be interpreted as the end of the start of a repeat
*/
return strip->actstart;
}
else {
/* - the 'fmod(..., actlength*scale)' is needed to get the repeats working
* - the '/ scale' is needed to ensure that scaling influences the timing within the repeat
*/
return strip->actend - fmodf(cframe - strip->start, actlength*scale) / scale;
}
}
}
else {
if (mode == NLATIME_CONVERT_MAP) {
return strip->start + scale*(cframe - strip->actstart);
}
else if (mode == NLATIME_CONVERT_UNMAP) {
return strip->actstart + (cframe - strip->start) / scale;
}
else /* if (mode == NLATIME_CONVERT_EVAL) */{
if (IS_EQF(cframe, strip->end) && IS_EQF(strip->repeat, ((int)strip->repeat))) {
/* this case prevents the motion snapping back to the first frame at the end of the strip
* by catching the case where repeats is a whole number, which means that the end of the strip
* could also be interpreted as the end of the start of a repeat
*/
return strip->actend;
}
else {
/* - the 'fmod(..., actlength*scale)' is needed to get the repeats working
* - the '/ scale' is needed to ensure that scaling influences the timing within the repeat
*/
return strip->actstart + fmodf(cframe - strip->start, actlength*scale) / scale;
}
}
}
}
/* non clipped mapping for strip-time <-> global time (for Transitions)
* invert = convert action-strip time to global time
*/
static float nlastrip_get_frame_transition (NlaStrip *strip, float cframe, short mode)
{
float length;
/* length of strip */
length= strip->end - strip->start;
/* reversed = play strip backwards */
if (strip->flag & NLASTRIP_FLAG_REVERSE) {
if (mode == NLATIME_CONVERT_MAP)
return strip->end - (length * cframe);
else
return (strip->end - cframe) / length;
}
else {
if (mode == NLATIME_CONVERT_MAP)
return (length * cframe) + strip->start;
else
return (cframe - strip->start) / length;
}
}
/* non clipped mapping for strip-time <-> global time
* mode = eNlaTime_ConvertModes[] -> NLATIME_CONVERT_*
*
* only secure for 'internal' (i.e. within AnimSys evaluation) operations,
* but should not be directly relied on for stuff which interacts with editors
*/
float nlastrip_get_frame (NlaStrip *strip, float cframe, short mode)
{
switch (strip->type) {
case NLASTRIP_TYPE_META: /* meta - for now, does the same as transition (is really just an empty container) */
case NLASTRIP_TYPE_TRANSITION: /* transition */
return nlastrip_get_frame_transition(strip, cframe, mode);
case NLASTRIP_TYPE_CLIP: /* action-clip (default) */
default:
return nlastrip_get_frame_actionclip(strip, cframe, mode);
}
}
/* Non clipped mapping for strip-time <-> global time
* mode = eNlaTime_ConvertModesp[] -> NLATIME_CONVERT_*
*
* Public API method - perform this mapping using the given AnimData block
* and perform any necessary sanity checks on the value
*/
float BKE_nla_tweakedit_remap (AnimData *adt, float cframe, short mode)
{
NlaStrip *strip;
/* sanity checks
* - obviously we've got to have some starting data
* - when not in tweakmode, the active Action does not have any scaling applied :)
* - when in tweakmode, if the no-mapping flag is set, do not map
*/
if ((adt == NULL) || (adt->flag & ADT_NLA_EDIT_ON)==0 || (adt->flag & ADT_NLA_EDIT_NOMAP))
return cframe;
/* if the active-strip info has been stored already, access this, otherwise look this up
* and store for (very probable) future usage
*/
if (adt->actstrip == NULL) {
NlaTrack *nlt= BKE_nlatrack_find_active(&adt->nla_tracks);
adt->actstrip= BKE_nlastrip_find_active(nlt);
}
strip= adt->actstrip;
/* sanity checks
* - in rare cases, we may not be able to find this strip for some reason (internal error)
* - for now, if the user has defined a curve to control the time, this correction cannot be performed
* reliably...
*/
if ((strip == NULL) || (strip->flag & NLASTRIP_FLAG_USR_TIME))
return cframe;
/* perform the correction now... */
return nlastrip_get_frame(strip, cframe, mode);
}
/* *************************************************** */
/* NLA API */
/* List of Strips ------------------------------------ */
/* (these functions are used for NLA-Tracks and also for nested/meta-strips) */
/* Check if there is any space in the given list to add the given strip */
short BKE_nlastrips_has_space (ListBase *strips, float start, float end)
{
NlaStrip *strip;
/* sanity checks */
if ((strips == NULL) || IS_EQF(start, end))
return 0;
if (start > end) {
puts("BKE_nlastrips_has_space() error... start and end arguments swapped");
SWAP(float, start, end);
}
/* loop over NLA strips checking for any overlaps with this area... */
for (strip= strips->first; strip; strip= strip->next) {
/* if start frame of strip is past the target end-frame, that means that
* we've gone past the window we need to check for, so things are fine
*/
if (strip->start >= end)
return 1;
/* if the end of the strip is greater than either of the boundaries, the range
* must fall within the extents of the strip
*/
if ((strip->end > start) || (strip->end > end))
return 0;
}
/* if we are still here, we haven't encountered any overlapping strips */
return 1;
}
/* Rearrange the strips in the track so that they are always in order
* (usually only needed after a strip has been moved)
*/
void BKE_nlastrips_sort_strips (ListBase *strips)
{
ListBase tmp = {NULL, NULL};
NlaStrip *strip, *sstrip, *stripn;
/* sanity checks */
if ELEM(NULL, strips, strips->first)
return;
/* we simply perform insertion sort on this list, since it is assumed that per track,
* there are only likely to be at most 5-10 strips
*/
for (strip= strips->first; strip; strip= stripn) {
short not_added = 1;
stripn= strip->next;
/* remove this strip from the list, and add it to the new list, searching from the end of
* the list, assuming that the lists are in order
*/
BLI_remlink(strips, strip);
for (sstrip= tmp.last; sstrip; sstrip= sstrip->prev) {
/* check if add after */
if (sstrip->end <= strip->start) {
BLI_insertlinkafter(&tmp, sstrip, strip);
not_added= 0;
break;
}
}
/* add before first? */
if (not_added)
BLI_addhead(&tmp, strip);
}
/* reassign the start and end points of the strips */
strips->first= tmp.first;
strips->last= tmp.last;
}
/* Add the given NLA-Strip to the given list of strips, assuming that it
* isn't currently a member of another list
*/
short BKE_nlastrips_add_strip (ListBase *strips, NlaStrip *strip)
{
NlaStrip *ns;
short not_added = 1;
/* sanity checks */
if ELEM(NULL, strips, strip)
return 0;
/* check if any space to add */
if (BKE_nlastrips_has_space(strips, strip->start, strip->end)==0)
return 0;
/* find the right place to add the strip to the nominated track */
for (ns= strips->first; ns; ns= ns->next) {
/* if current strip occurs after the new strip, add it before */
if (ns->start >= strip->end) {
BLI_insertlinkbefore(strips, ns, strip);
not_added= 0;
break;
}
}
if (not_added) {
/* just add to the end of the list of the strips then... */
BLI_addtail(strips, strip);
}
/* added... */
return 1;
}
/* Meta-Strips ------------------------------------ */
/* Convert 'islands' (i.e. continuous string of) selected strips to be
* contained within 'Meta-Strips' which act as strips which contain strips.
* temp: are the meta-strips to be created 'temporary' ones used for transforms?
*/
void BKE_nlastrips_make_metas (ListBase *strips, short temp)
{
NlaStrip *mstrip = NULL;
NlaStrip *strip, *stripn;
/* sanity checks */
if ELEM(NULL, strips, strips->first)
return;
/* group all continuous chains of selected strips into meta-strips */
for (strip= strips->first; strip; strip= stripn) {
stripn= strip->next;
if (strip->flag & NLASTRIP_FLAG_SELECT) {
/* if there is an existing meta-strip, add this strip to it, otherwise, create a new one */
if (mstrip == NULL) {
/* add a new meta-strip, and add it before the current strip that it will replace... */
mstrip= MEM_callocN(sizeof(NlaStrip), "Meta-NlaStrip");
mstrip->type = NLASTRIP_TYPE_META;
BLI_insertlinkbefore(strips, strip, mstrip);
/* set flags */
mstrip->flag = NLASTRIP_FLAG_SELECT;
/* set temp flag if appropriate (i.e. for transform-type editing) */
if (temp)
mstrip->flag |= NLASTRIP_FLAG_TEMP_META;
/* set default repeat/scale values to prevent warnings */
mstrip->repeat= mstrip->scale= 1.0f;
/* make its start frame be set to the start frame of the current strip */
mstrip->start= strip->start;
}
/* remove the selected strips from the track, and add to the meta */
BLI_remlink(strips, strip);
BLI_addtail(&mstrip->strips, strip);
/* expand the meta's dimensions to include the newly added strip- i.e. its last frame */
mstrip->end= strip->end;
}
else {
/* current strip wasn't selected, so the end of 'island' of selected strips has been reached,
* so stop adding strips to the current meta
*/
mstrip= NULL;
}
}
}
/* Split a meta-strip into a set of normal strips */
void BKE_nlastrips_clear_metastrip (ListBase *strips, NlaStrip *strip)
{
NlaStrip *cs, *csn;
/* sanity check */
if ELEM(NULL, strips, strip)
return;
/* move each one of the meta-strip's children before the meta-strip
* in the list of strips after unlinking them from the meta-strip
*/
for (cs= strip->strips.first; cs; cs= csn) {
csn= cs->next;
BLI_remlink(&strip->strips, cs);
BLI_insertlinkbefore(strips, strip, cs);
}
/* free the meta-strip now */
free_nlastrip(strips, strip);
}
/* Remove meta-strips (i.e. flatten the list of strips) from the top-level of the list of strips
* sel: only consider selected meta-strips, otherwise all meta-strips are removed
* onlyTemp: only remove the 'temporary' meta-strips used for transforms
*/
void BKE_nlastrips_clear_metas (ListBase *strips, short onlySel, short onlyTemp)
{
NlaStrip *strip, *stripn;
/* sanity checks */
if ELEM(NULL, strips, strips->first)
return;
/* remove meta-strips fitting the criteria of the arguments */
for (strip= strips->first; strip; strip= stripn) {
stripn= strip->next;
/* check if strip is a meta-strip */
if (strip->type == NLASTRIP_TYPE_META) {
/* if check if selection and 'temporary-only' considerations are met */
if ((onlySel==0) || (strip->flag & NLASTRIP_FLAG_SELECT)) {
if ((!onlyTemp) || (strip->flag & NLASTRIP_FLAG_TEMP_META)) {
BKE_nlastrips_clear_metastrip(strips, strip);
}
}
}
}
}
/* Add the given NLA-Strip to the given Meta-Strip, assuming that the
* strip isn't attached to anyy list of strips
*/
short BKE_nlameta_add_strip (NlaStrip *mstrip, NlaStrip *strip)
{
/* sanity checks */
if ELEM(NULL, mstrip, strip)
return 0;
/* firstly, check if the meta-strip has space for this */
if (BKE_nlastrips_has_space(&mstrip->strips, strip->start, strip->end) == 0)
return 0;
/* check if this would need to be added to the ends of the meta,
* and subsequently, if the neighboring strips allow us enough room
*/
if (strip->start < mstrip->start) {
/* check if strip to the left (if it exists) ends before the
* start of the strip we're trying to add
*/
if ((mstrip->prev == NULL) || (mstrip->prev->end <= strip->start)) {
/* add strip to start of meta's list, and expand dimensions */
BLI_addhead(&mstrip->strips, strip);
mstrip->start= strip->start;
return 1;
}
else /* failed... no room before */
return 0;
}
else if (strip->end > mstrip->end) {
/* check if strip to the right (if it exists) starts before the
* end of the strip we're trying to add
*/
if ((mstrip->next == NULL) || (mstrip->next->start >= strip->end)) {
/* add strip to end of meta's list, and expand dimensions */
BLI_addtail(&mstrip->strips, strip);
mstrip->end= strip->end;
return 1;
}
else /* failed... no room after */
return 0;
}
else {
/* just try to add to the meta-strip (no dimension changes needed) */
return BKE_nlastrips_add_strip(&mstrip->strips, strip);
}
}
/* Adjust the settings of NLA-Strips contained within a Meta-Strip (recursively),
* until the Meta-Strips children all fit within the Meta-Strip's new dimensions
*/
void BKE_nlameta_flush_transforms (NlaStrip *mstrip)
{
NlaStrip *strip;
float oStart, oEnd, offset;
float oLen, nLen;
short scaleChanged= 0;
/* sanity checks
* - strip must exist
* - strip must be a meta-strip with some contents
*/
if ELEM(NULL, mstrip, mstrip->strips.first)
return;
if (mstrip->type != NLASTRIP_TYPE_META)
return;
/* get the original start/end points, and calculate the start-frame offset
* - these are simply the start/end frames of the child strips,
* since we assume they weren't transformed yet
*/
oStart= ((NlaStrip *)mstrip->strips.first)->start;
oEnd= ((NlaStrip *)mstrip->strips.last)->end;
offset= mstrip->start - oStart;
/* optimisation:
* don't flush if nothing changed yet
* TODO: maybe we need a flag to say always flush?
*/
if (IS_EQF(oStart, mstrip->start) && IS_EQF(oEnd, mstrip->end))
return;
/* check if scale changed */
oLen = oEnd - oStart;
nLen = mstrip->end - mstrip->start;
if (IS_EQF(nLen, oLen) == 0)
scaleChanged= 1;
/* for each child-strip, calculate new start/end points based on this new info */
for (strip= mstrip->strips.first; strip; strip= strip->next) {
if (scaleChanged) {
float p1, p2;
/* compute positions of endpoints relative to old extents of strip */
p1= (strip->start - oStart) / oLen;
p2= (strip->end - oStart) / oLen;
/* apply new strip endpoints using the proportions, then wait for second pass to flush scale properly */
strip->start= (p1 * nLen) + mstrip->start;
strip->end= (p2 * nLen) + mstrip->start;
}
else {
/* just apply the changes in offset to both ends of the strip */
strip->start += offset;
strip->end += offset;
}
}
/* apply a second pass over child strips, to finish up unfinished business */
for (strip= mstrip->strips.first; strip; strip= strip->next) {
/* only if scale changed, need to perform RNA updates */
if (scaleChanged) {
PointerRNA ptr;
/* use RNA updates to compute scale properly */
RNA_pointer_create(NULL, &RNA_NlaStrip, strip, &ptr);
RNA_float_set(&ptr, "frame_start", strip->start);
RNA_float_set(&ptr, "frame_end", strip->end);
}
/* finally, make sure the strip's children (if it is a meta-itself), get updated */
BKE_nlameta_flush_transforms(strip);
}
}
/* NLA-Tracks ---------------------------------------- */
/* Find the active NLA-track for the given stack */
NlaTrack *BKE_nlatrack_find_active (ListBase *tracks)
{
NlaTrack *nlt;
/* sanity check */
if ELEM(NULL, tracks, tracks->first)
return NULL;
/* try to find the first active track */
for (nlt= tracks->first; nlt; nlt= nlt->next) {
if (nlt->flag & NLATRACK_ACTIVE)
return nlt;
}
/* none found */
return NULL;
}
/* Toggle the 'solo' setting for the given NLA-track, making sure that it is the only one
* that has this status in its AnimData block.
*/
void BKE_nlatrack_solo_toggle (AnimData *adt, NlaTrack *nlt)
{
NlaTrack *nt;
/* sanity check */
if ELEM(NULL, adt, adt->nla_tracks.first)
return;
/* firstly, make sure 'solo' flag for all tracks is disabled */
for (nt= adt->nla_tracks.first; nt; nt= nt->next) {
if (nt != nlt)
nt->flag &= ~NLATRACK_SOLO;
}
/* now, enable 'solo' for the given track if appropriate */
if (nlt) {
/* toggle solo status */
nlt->flag ^= NLATRACK_SOLO;
/* set or clear solo-status on AnimData */
if (nlt->flag & NLATRACK_SOLO)
adt->flag |= ADT_NLA_SOLO_TRACK;
else
adt->flag &= ~ADT_NLA_SOLO_TRACK;
}
else
adt->flag &= ~ADT_NLA_SOLO_TRACK;
}
/* Make the given NLA-track the active one for the given stack. If no track is provided,
* this function can be used to simply deactivate all the NLA tracks in the given stack too.
*/
void BKE_nlatrack_set_active (ListBase *tracks, NlaTrack *nlt_a)
{
NlaTrack *nlt;
/* sanity check */
if ELEM(NULL, tracks, tracks->first)
return;
/* deactive all the rest */
for (nlt= tracks->first; nlt; nlt= nlt->next)
nlt->flag &= ~NLATRACK_ACTIVE;
/* set the given one as the active one */
if (nlt_a)
nlt_a->flag |= NLATRACK_ACTIVE;
}
/* Check if there is any space in the given track to add a strip of the given length */
short BKE_nlatrack_has_space (NlaTrack *nlt, float start, float end)
{
/* sanity checks
* - track must exist
* - track must be editable
* - bounds cannot be equal (0-length is nasty)
*/
if ((nlt == NULL) || (nlt->flag & NLATRACK_PROTECTED) || IS_EQF(start, end))
return 0;
if (start > end) {
puts("BKE_nlatrack_has_space() error... start and end arguments swapped");
SWAP(float, start, end);
}
/* check if there's any space left in the track for a strip of the given length */
return BKE_nlastrips_has_space(&nlt->strips, start, end);
}
/* Rearrange the strips in the track so that they are always in order
* (usually only needed after a strip has been moved)
*/
void BKE_nlatrack_sort_strips (NlaTrack *nlt)
{
/* sanity checks */
if ELEM(NULL, nlt, nlt->strips.first)
return;
/* sort the strips with a more generic function */
BKE_nlastrips_sort_strips(&nlt->strips);
}
/* Add the given NLA-Strip to the given NLA-Track, assuming that it
* isn't currently attached to another one
*/
short BKE_nlatrack_add_strip (NlaTrack *nlt, NlaStrip *strip)
{
/* sanity checks */
if ELEM(NULL, nlt, strip)
return 0;
/* try to add the strip to the track using a more generic function */
return BKE_nlastrips_add_strip(&nlt->strips, strip);
}
/* Get the extents of the given NLA-Track including gaps between strips,
* returning whether this succeeded or not
*/
short BKE_nlatrack_get_bounds (NlaTrack *nlt, float bounds[2])
{
NlaStrip *strip;
/* initialise bounds */
if (bounds)
bounds[0] = bounds[1] = 0.0f;
else
return 0;
/* sanity checks */
if ELEM(NULL, nlt, nlt->strips.first)
return 0;
/* lower bound is first strip's start frame */
strip = nlt->strips.first;
bounds[0] = strip->start;
/* upper bound is last strip's end frame */
strip = nlt->strips.last;
bounds[1] = strip->end;
/* done */
return 1;
}
/* NLA Strips -------------------------------------- */
/* Find the active NLA-strip within the given track */
NlaStrip *BKE_nlastrip_find_active (NlaTrack *nlt)
{
NlaStrip *strip;
/* sanity check */
if ELEM(NULL, nlt, nlt->strips.first)
return NULL;
/* try to find the first active strip */
for (strip= nlt->strips.first; strip; strip= strip->next) {
if (strip->flag & NLASTRIP_FLAG_ACTIVE)
return strip;
}
/* none found */
return NULL;
}
/* Make the given NLA-Strip the active one within the given block */
void BKE_nlastrip_set_active (AnimData *adt, NlaStrip *strip)
{
NlaTrack *nlt;
NlaStrip *nls;
/* sanity checks */
if (adt == NULL)
return;
/* loop over tracks, deactivating*/
for (nlt= adt->nla_tracks.first; nlt; nlt= nlt->next) {
for (nls= nlt->strips.first; nls; nls= nls->next) {
if (nls != strip)
nls->flag &= ~NLASTRIP_FLAG_ACTIVE;
else
nls->flag |= NLASTRIP_FLAG_ACTIVE;
}
}
}
/* Does the given NLA-strip fall within the given bounds (times)? */
short BKE_nlastrip_within_bounds (NlaStrip *strip, float min, float max)
{
const float stripLen= (strip) ? strip->end - strip->start : 0.0f;
const float boundsLen= fabsf(max - min);
/* sanity checks */
if ((strip == NULL) || IS_EQF(stripLen, 0.0f) || IS_EQF(boundsLen, 0.0f))
return 0;
/* only ok if at least part of the strip is within the bounding window
* - first 2 cases cover when the strip length is less than the bounding area
* - second 2 cases cover when the strip length is greater than the bounding area
*/
if ( (stripLen < boundsLen) &&
!(IN_RANGE(strip->start, min, max) ||
IN_RANGE(strip->end, min, max)) )
{
return 0;
}
if ( (stripLen > boundsLen) &&
!(IN_RANGE(min, strip->start, strip->end) ||
IN_RANGE(max, strip->start, strip->end)) )
{
return 0;
}
/* should be ok! */
return 1;
}
/* Recalculate the start and end frames for the current strip, after changing
* the extents of the action or the mapping (repeats or scale factor) info
*/
void BKE_nlastrip_recalculate_bounds (NlaStrip *strip)
{
float actlen, mapping;
/* sanity checks
* - must have a strip
* - can only be done for action clips
*/
if ((strip == NULL) || (strip->type != NLASTRIP_TYPE_CLIP))
return;
/* calculate new length factors */
actlen= strip->actend - strip->actstart;
if (IS_EQF(actlen, 0.0f)) actlen= 1.0f;
mapping= strip->scale * strip->repeat;
/* adjust endpoint of strip in response to this */
if (IS_EQF(mapping, 0.0f) == 0)
strip->end = (actlen * mapping) + strip->start;
}
/* Is the given NLA-strip the first one to occur for the given AnimData block */
// TODO: make this an api method if necesary, but need to add prefix first
static short nlastrip_is_first (AnimData *adt, NlaStrip *strip)
{
NlaTrack *nlt;
NlaStrip *ns;
/* sanity checks */
if ELEM(NULL, adt, strip)
return 0;
/* check if strip has any strips before it */
if (strip->prev)
return 0;
/* check other tracks to see if they have a strip that's earlier */
// TODO: or should we check that the strip's track is also the first?
for (nlt= adt->nla_tracks.first; nlt; nlt= nlt->next) {
/* only check the first strip, assuming that they're all in order */
ns= nlt->strips.first;
if (ns) {
if (ns->start < strip->start)
return 0;
}
}
/* should be first now */
return 1;
}
/* Animated Strips ------------------------------------------- */
/* Check if the given NLA-Track has any strips with own F-Curves */
short BKE_nlatrack_has_animated_strips (NlaTrack *nlt)
{
NlaStrip *strip;
/* sanity checks */
if ELEM(NULL, nlt, nlt->strips.first)
return 0;
/* check each strip for F-Curves only (don't care about whether the flags are set) */
for (strip= nlt->strips.first; strip; strip= strip->next) {
if (strip->fcurves.first)
return 1;
}
/* none found */
return 0;
}
/* Check if given NLA-Tracks have any strips with own F-Curves */
short BKE_nlatracks_have_animated_strips (ListBase *tracks)
{
NlaTrack *nlt;
/* sanity checks */
if ELEM(NULL, tracks, tracks->first)
return 0;
/* check each track, stopping on the first hit */
for (nlt= tracks->first; nlt; nlt= nlt->next) {
if (BKE_nlatrack_has_animated_strips(nlt))
return 1;
}
/* none found */
return 0;
}
/* Validate the NLA-Strips 'control' F-Curves based on the flags set*/
void BKE_nlastrip_validate_fcurves (NlaStrip *strip)
{
FCurve *fcu;
/* sanity checks */
if (strip == NULL)
return;
/* if controlling influence... */
if (strip->flag & NLASTRIP_FLAG_USR_INFLUENCE) {
/* try to get F-Curve */
fcu= list_find_fcurve(&strip->fcurves, "influence", 0);
/* add one if not found */
if (fcu == NULL) {
/* make new F-Curve */
fcu= MEM_callocN(sizeof(FCurve), "NlaStrip FCurve");
BLI_addtail(&strip->fcurves, fcu);
/* set default flags */
fcu->flag = (FCURVE_VISIBLE|FCURVE_SELECTED);
/* store path - make copy, and store that */
fcu->rna_path= BLI_strdupn("influence", 9);
// TODO: insert a few keyframes to ensure default behavior?
}
}
/* if controlling time... */
if (strip->flag & NLASTRIP_FLAG_USR_TIME) {
/* try to get F-Curve */
fcu= list_find_fcurve(&strip->fcurves, "strip_time", 0);
/* add one if not found */
if (fcu == NULL) {
/* make new F-Curve */
fcu= MEM_callocN(sizeof(FCurve), "NlaStrip FCurve");
BLI_addtail(&strip->fcurves, fcu);
/* set default flags */
fcu->flag = (FCURVE_VISIBLE|FCURVE_SELECTED);
/* store path - make copy, and store that */
fcu->rna_path= BLI_strdupn("strip_time", 10);
// TODO: insert a few keyframes to ensure default behavior?
}
}
}
/* Sanity Validation ------------------------------------ */
static int nla_editbone_name_check(void *arg, const char *name)
{
return BLI_ghash_haskey((GHash *)arg, (void *)name);
}
/* Find (and set) a unique name for a strip from the whole AnimData block
* Uses a similar method to the BLI method, but is implemented differently
* as we need to ensure that the name is unique over several lists of tracks,
* not just a single track.
*/
void BKE_nlastrip_validate_name (AnimData *adt, NlaStrip *strip)
{
GHash *gh;
NlaStrip *tstrip;
NlaTrack *nlt;
/* sanity checks */
if ELEM(NULL, adt, strip)
return;
/* give strip a default name if none already */
if (strip->name[0]==0) {
switch (strip->type) {
case NLASTRIP_TYPE_CLIP: /* act-clip */
BLI_strncpy(strip->name, (strip->act)?(strip->act->id.name+2):("<No Action>"), sizeof(strip->name));
break;
case NLASTRIP_TYPE_TRANSITION: /* transition */
BLI_strncpy(strip->name, "Transition", sizeof(strip->name));
break;
case NLASTRIP_TYPE_META: /* meta */
BLI_strncpy(strip->name, "Meta", sizeof(strip->name));
break;
default:
BLI_strncpy(strip->name, "NLA Strip", sizeof(strip->name));
break;
}
}
/* build a hash-table of all the strips in the tracks
* - this is easier than iterating over all the tracks+strips hierarchy everytime
* (and probably faster)
*/
gh= BLI_ghash_new(BLI_ghashutil_strhash, BLI_ghashutil_strcmp, "nlastrip_validate_name gh");
for (nlt= adt->nla_tracks.first; nlt; nlt= nlt->next) {
for (tstrip= nlt->strips.first; tstrip; tstrip= tstrip->next) {
/* don't add the strip of interest */
if (tstrip == strip)
continue;
/* use the name of the strip as the key, and the strip as the value, since we're mostly interested in the keys */
BLI_ghash_insert(gh, tstrip->name, tstrip);
}
}
/* if the hash-table has a match for this name, try other names...
* - in an extreme case, it might not be able to find a name, but then everything else in Blender would fail too :)
*/
BLI_uniquename_cb(nla_editbone_name_check, (void *)gh, "NlaStrip", '.', strip->name, sizeof(strip->name));
/* free the hash... */
BLI_ghash_free(gh, NULL, NULL);
}
/* ---- */
/* Get strips which overlap the given one at the start/end of its range
* - strip: strip that we're finding overlaps for
* - track: nla-track that the overlapping strips should be found from
* - start, end: frames for the offending endpoints
*/
static void nlastrip_get_endpoint_overlaps (NlaStrip *strip, NlaTrack *track, float **start, float **end)
{
NlaStrip *nls;
/* find strips that overlap over the start/end of the given strip,
* but which don't cover the entire length
*/
// TODO: this scheme could get quite slow for doing this on many strips...
for (nls= track->strips.first; nls; nls= nls->next) {
/* check if strip overlaps (extends over or exactly on) the entire range of the strip we're validating */
if ((nls->start <= strip->start) && (nls->end >= strip->end)) {
*start= NULL;
*end= NULL;
return;
}
/* check if strip doesn't even occur anywhere near... */
if (nls->end < strip->start)
continue; /* skip checking this strip... not worthy of mention */
if (nls->start > strip->end)
return; /* the range we're after has already passed */
/* if this strip is not part of an island of continuous strips, it can be used
* - this check needs to be done for each end of the strip we try and use...
*/
if ((nls->next == NULL) || IS_EQF(nls->next->start, nls->end)==0) {
if ((nls->end > strip->start) && (nls->end < strip->end))
*start= &nls->end;
}
if ((nls->prev == NULL) || IS_EQF(nls->prev->end, nls->start)==0) {
if ((nls->start < strip->end) && (nls->start > strip->start))
*end= &nls->start;
}
}
}
/* Determine auto-blending for the given strip */
static void BKE_nlastrip_validate_autoblends (NlaTrack *nlt, NlaStrip *nls)
{
float *ps=NULL, *pe=NULL;
float *ns=NULL, *ne=NULL;
/* sanity checks */
if ELEM(NULL, nls, nlt)
return;
if ((nlt->prev == NULL) && (nlt->next == NULL))
return;
if ((nls->flag & NLASTRIP_FLAG_AUTO_BLENDS)==0)
return;
/* get test ranges */
if (nlt->prev)
nlastrip_get_endpoint_overlaps(nls, nlt->prev, &ps, &pe);
if (nlt->next)
nlastrip_get_endpoint_overlaps(nls, nlt->next, &ns, &ne);
/* set overlaps for this strip
* - don't use the values obtained though if the end in question
* is directly followed/preceeded by another strip, forming an
* 'island' of continuous strips
*/
if ( (ps || ns) && ((nls->prev == NULL) || IS_EQF(nls->prev->end, nls->start)==0) )
{
/* start overlaps - pick the largest overlap */
if ( ((ps && ns) && (*ps > *ns)) || (ps) )
nls->blendin= *ps - nls->start;
else
nls->blendin= *ns - nls->start;
}
else /* no overlap allowed/needed */
nls->blendin= 0.0f;
if ( (pe || ne) && ((nls->next == NULL) || IS_EQF(nls->next->start, nls->end)==0) )
{
/* end overlaps - pick the largest overlap */
if ( ((pe && ne) && (*pe > *ne)) || (pe) )
nls->blendout= nls->end - *pe;
else
nls->blendout= nls->end - *ne;
}
else /* no overlap allowed/needed */
nls->blendout= 0.0f;
}
/* Ensure that auto-blending and other settings are set correctly */
void BKE_nla_validate_state (AnimData *adt)
{
NlaStrip *strip, *fstrip=NULL;
NlaTrack *nlt;
/* sanity checks */
if ELEM(NULL, adt, adt->nla_tracks.first)
return;
/* adjust blending values for auto-blending, and also do an initial pass to find the earliest strip */
for (nlt= adt->nla_tracks.first; nlt; nlt= nlt->next) {
for (strip= nlt->strips.first; strip; strip= strip->next) {
/* auto-blending first */
BKE_nlastrip_validate_autoblends(nlt, strip);
/* extend mode - find first strip */
if ((fstrip == NULL) || (strip->start < fstrip->start))
fstrip= strip;
}
}
/* second pass over the strips to adjust the extend-mode to fix any problems */
for (nlt= adt->nla_tracks.first; nlt; nlt= nlt->next) {
for (strip= nlt->strips.first; strip; strip= strip->next) {
/* apart from 'nothing' option which user has to explicitly choose, we don't really know if
* we should be overwriting the extend setting (but assume that's what the user wanted)
*/
// TODO: 1 solution is to tie this in with auto-blending...
if (strip->extendmode != NLASTRIP_EXTEND_NOTHING) {
/* 1) First strip must be set to extend hold, otherwise, stuff before acts dodgy
* 2) Only overwrite extend mode if *not* changing it will most probably result in
* occlusion problems, which will occur iff
* - blendmode = REPLACE
* - all channels the same (this is fiddly to test, so is currently assumed)
*
* Should fix problems such as [#29869]
*/
if (strip == fstrip)
strip->extendmode= NLASTRIP_EXTEND_HOLD;
else if (strip->blendmode == NLASTRIP_MODE_REPLACE)
strip->extendmode= NLASTRIP_EXTEND_HOLD_FORWARD;
}
}
}
}
/* Core Tools ------------------------------------------- */
/* For the given AnimData block, add the active action to the NLA
* stack (i.e. 'push-down' action). The UI should only allow this
* for normal editing only (i.e. not in editmode for some strip's action),
* so no checks for this are performed.
*/
// TODO: maybe we should have checks for this too...
void BKE_nla_action_pushdown (AnimData *adt)
{
NlaStrip *strip;
/* sanity checks */
// TODO: need to report the error for this
if ELEM(NULL, adt, adt->action)
return;
/* if the action is empty, we also shouldn't try to add to stack,
* as that will cause us grief down the track
*/
// TODO: what about modifiers?
if (action_has_motion(adt->action) == 0) {
printf("BKE_nla_action_pushdown(): action has no data \n");
return;
}
/* add a new NLA strip to the track, which references the active action */
strip= add_nlastrip_to_stack(adt, adt->action);
/* do other necessary work on strip */
if (strip) {
/* clear reference to action now that we've pushed it onto the stack */
id_us_min(&adt->action->id);
adt->action= NULL;
/* if the strip is the first one in the track it lives in, check if there
* are strips in any other tracks that may be before this, and set the extend
* mode accordingly
*/
if (nlastrip_is_first(adt, strip) == 0) {
/* not first, so extend mode can only be NLASTRIP_EXTEND_HOLD_FORWARD not NLASTRIP_EXTEND_HOLD,
* so that it doesn't override strips in previous tracks
*/
// FIXME: this needs to be more automated, since user can rearrange strips
strip->extendmode= NLASTRIP_EXTEND_HOLD_FORWARD;
}
/* make strip the active one... */
BKE_nlastrip_set_active(adt, strip);
}
}
/* Find the active strip + track combo, and set them up as the tweaking track,
* and return if successful or not.
*/
short BKE_nla_tweakmode_enter (AnimData *adt)
{
NlaTrack *nlt, *activeTrack=NULL;
NlaStrip *strip, *activeStrip=NULL;
/* verify that data is valid */
if ELEM(NULL, adt, adt->nla_tracks.first)
return 0;
/* if block is already in tweakmode, just leave, but we should report
* that this block is in tweakmode (as our returncode)
*/
if (adt->flag & ADT_NLA_EDIT_ON)
return 1;
/* go over the tracks, finding the active one, and its active strip
* - if we cannot find both, then there's nothing to do
*/
for (nlt= adt->nla_tracks.first; nlt; nlt= nlt->next) {
/* check if active */
if (nlt->flag & NLATRACK_ACTIVE) {
/* store reference to this active track */
activeTrack= nlt;
/* now try to find active strip */
activeStrip= BKE_nlastrip_find_active(nlt);
break;
}
}
/* There are situations where we may have multiple strips selected and we want to enter tweakmode on all
* of those at once. Usually in those cases, it will usually just be a single strip per AnimData.
* In such cases, compromise and take the last selected track and/or last selected strip [#28468]
*/
if (activeTrack == NULL) {
/* try last selected track for active strip */
for (nlt = adt->nla_tracks.last; nlt; nlt = nlt->prev) {
if (nlt->flag & NLATRACK_SELECTED) {
/* assume this is the active track */
activeTrack= nlt;
/* try to find active strip */
activeStrip= BKE_nlastrip_find_active(nlt);
break;
}
}
}
if ((activeTrack) && (activeStrip == NULL)) {
/* no active strip in active or last selected track; compromise for first selected (assuming only single)... */
for (strip = activeTrack->strips.first; strip; strip= strip->next) {
if (strip->flag & (NLASTRIP_FLAG_SELECT|NLASTRIP_FLAG_ACTIVE)) {
activeStrip = strip;
break;
}
}
}
if ELEM3(NULL, activeTrack, activeStrip, activeStrip->act) {
if (G.f & G_DEBUG) {
printf("NLA tweakmode enter - neither active requirement found \n");
printf("\tactiveTrack = %p, activeStrip = %p \n", (void *)activeTrack, (void *)activeStrip);
}
return 0;
}
/* go over all the tracks up to the active one, tagging each strip that uses the same
* action as the active strip, but leaving everything else alone
*/
for (nlt= activeTrack->prev; nlt; nlt= nlt->prev) {
for (strip= nlt->strips.first; strip; strip= strip->next) {
if (strip->act == activeStrip->act)
strip->flag |= NLASTRIP_FLAG_TWEAKUSER;
else
strip->flag &= ~NLASTRIP_FLAG_TWEAKUSER;
}
}
/* go over all the tracks after AND INCLUDING the active one, tagging them as being disabled
* - the active track needs to also be tagged, otherwise, it'll overlap with the tweaks going on
*/
for (nlt= activeTrack; nlt; nlt= nlt->next)
nlt->flag |= NLATRACK_DISABLED;
/* handle AnimData level changes:
* - 'real' active action to temp storage (no need to change user-counts)
* - action of active strip set to be the 'active action', and have its usercount incremented
* - editing-flag for this AnimData block should also get turned on (for more efficient restoring)
* - take note of the active strip for mapping-correction of keyframes in the action being edited
*/
adt->tmpact= adt->action;
adt->action= activeStrip->act;
adt->actstrip= activeStrip;
id_us_plus(&activeStrip->act->id);
adt->flag |= ADT_NLA_EDIT_ON;
/* done! */
return 1;
}
/* Exit tweakmode for this AnimData block */
void BKE_nla_tweakmode_exit (AnimData *adt)
{
NlaStrip *strip;
NlaTrack *nlt;
/* verify that data is valid */
if ELEM(NULL, adt, adt->nla_tracks.first)
return;
/* hopefully the flag is correct - skip if not on */
if ((adt->flag & ADT_NLA_EDIT_ON) == 0)
return;
// TODO: need to sync the user-strip with the new state of the action!
/* for all Tracks, clear the 'disabled' flag
* for all Strips, clear the 'tweak-user' flag
*/
for (nlt= adt->nla_tracks.first; nlt; nlt= nlt->next) {
nlt->flag &= ~NLATRACK_DISABLED;
for (strip= nlt->strips.first; strip; strip= strip->next)
strip->flag &= ~NLASTRIP_FLAG_TWEAKUSER;
}
/* handle AnimData level changes:
* - 'temporary' active action needs its usercount decreased, since we're removing this reference
* - 'real' active action is restored from storage
* - storage pointer gets cleared (to avoid having bad notes hanging around)
* - editing-flag for this AnimData block should also get turned off
* - clear pointer to active strip
*/
if (adt->action) adt->action->id.us--;
adt->action= adt->tmpact;
adt->tmpact= NULL;
adt->actstrip= NULL;
adt->flag &= ~ADT_NLA_EDIT_ON;
}
/* Baking Tools ------------------------------------------- */
static void UNUSED_FUNCTION(BKE_nla_bake) (Scene *scene, ID *UNUSED(id), AnimData *adt, int UNUSED(flag))
{
/* verify that data is valid
* 1) Scene and AnimData must be provided
* 2) there must be tracks to merge...
*/
if ELEM3(NULL, scene, adt, adt->nla_tracks.first)
return;
/* if animdata currently has an action, 'push down' this onto the stack first */
if (adt->action)
BKE_nla_action_pushdown(adt);
/* get range of motion to bake, and the channels involved... */
/* temporarily mute the action, and start keying to it */
/* start keying... */
/* unmute the action */
}
/* *************************************************** */
|