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
|
/*
* ***** 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) 2008 Blender Foundation.
* All rights reserved.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/space_view3d/view3d_utils.c
* \ingroup spview3d
*
* 3D View checks and manipulation (no operators).
*/
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <float.h>
#include "DNA_camera_types.h"
#include "DNA_curve_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_world_types.h"
#include "MEM_guardedalloc.h"
#include "BLI_bitmap_draw_2d.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BKE_camera.h"
#include "BKE_context.h"
#include "BKE_main.h"
#include "BKE_object.h"
#include "BKE_screen.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
#include "BIF_gl.h"
#include "BIF_glutil.h"
#include "GPU_matrix.h"
#include "WM_api.h"
#include "WM_types.h"
#include "ED_keyframing.h"
#include "ED_screen.h"
#include "ED_view3d.h"
#include "UI_resources.h"
#include "view3d_intern.h" /* own include */
/* -------------------------------------------------------------------- */
/** \name View Data Access Utilities
*
* \{ */
void ED_view3d_background_color_get(const Scene *scene, const View3D *v3d, float r_color[3])
{
switch (v3d->shading.background_type) {
case V3D_SHADING_BACKGROUND_WORLD:
copy_v3_v3(r_color, &scene->world->horr);
break;
case V3D_SHADING_BACKGROUND_VIEWPORT:
copy_v3_v3(r_color, v3d->shading.background_color);
break;
case V3D_SHADING_BACKGROUND_THEME:
default:
UI_GetThemeColor3fv(TH_HIGH_GRAD, r_color);
break;
}
}
void ED_view3d_cursor3d_calc_mat3(const Scene *scene, float mat[3][3])
{
const View3DCursor *cursor = &scene->cursor;
quat_to_mat3(mat, cursor->rotation);
}
void ED_view3d_cursor3d_calc_mat4(const Scene *scene, float mat[4][4])
{
const View3DCursor *cursor = &scene->cursor;
quat_to_mat4(mat, cursor->rotation);
copy_v3_v3(mat[3], cursor->location);
}
Camera *ED_view3d_camera_data_get(View3D *v3d, RegionView3D *rv3d)
{
/* establish the camera object, so we can default to view mapping if anything is wrong with it */
if ((rv3d->persp == RV3D_CAMOB) && v3d->camera && (v3d->camera->type == OB_CAMERA)) {
return v3d->camera->data;
}
else {
return NULL;
}
}
void ED_view3d_dist_range_get(
const View3D *v3d,
float r_dist_range[2])
{
r_dist_range[0] = v3d->grid * 0.001f;
r_dist_range[1] = v3d->far * 10.0f;
}
/**
* \note copies logic of #ED_view3d_viewplane_get(), keep in sync.
*/
bool ED_view3d_clip_range_get(
Depsgraph *depsgraph,
const View3D *v3d, const RegionView3D *rv3d,
float *r_clipsta, float *r_clipend,
const bool use_ortho_factor)
{
CameraParams params;
BKE_camera_params_init(¶ms);
BKE_camera_params_from_view3d(¶ms, depsgraph, v3d, rv3d);
if (use_ortho_factor && params.is_ortho) {
const float fac = 2.0f / (params.clipend - params.clipsta);
params.clipsta *= fac;
params.clipend *= fac;
}
if (r_clipsta) *r_clipsta = params.clipsta;
if (r_clipend) *r_clipend = params.clipend;
return params.is_ortho;
}
bool ED_view3d_viewplane_get(
Depsgraph *depsgraph,
const View3D *v3d, const RegionView3D *rv3d, int winx, int winy,
rctf *r_viewplane, float *r_clipsta, float *r_clipend, float *r_pixsize)
{
CameraParams params;
BKE_camera_params_init(¶ms);
BKE_camera_params_from_view3d(¶ms, depsgraph, v3d, rv3d);
BKE_camera_params_compute_viewplane(¶ms, winx, winy, 1.0f, 1.0f);
if (r_viewplane) *r_viewplane = params.viewplane;
if (r_clipsta) *r_clipsta = params.clipsta;
if (r_clipend) *r_clipend = params.clipend;
if (r_pixsize) *r_pixsize = params.viewdx;
return params.is_ortho;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View State/Context Utilities
*
* \{ */
/**
* Use this call when executing an operator,
* event system doesn't set for each event the OpenGL drawing context.
*/
void view3d_operator_needs_opengl(const bContext *C)
{
wmWindow *win = CTX_wm_window(C);
ARegion *ar = CTX_wm_region(C);
view3d_region_operator_needs_opengl(win, ar);
}
void view3d_region_operator_needs_opengl(wmWindow *UNUSED(win), ARegion *ar)
{
/* for debugging purpose, context should always be OK */
if ((ar == NULL) || (ar->regiontype != RGN_TYPE_WINDOW)) {
printf("view3d_region_operator_needs_opengl error, wrong region\n");
}
else {
RegionView3D *rv3d = ar->regiondata;
wmViewport(&ar->winrct); // TODO: bad
GPU_matrix_projection_set(rv3d->winmat);
GPU_matrix_set(rv3d->viewmat);
}
}
/**
* Use instead of: ``bglPolygonOffset(rv3d->dist, ...)`` see bug [#37727]
*/
void ED_view3d_polygon_offset(const RegionView3D *rv3d, const float dist)
{
float viewdist;
if (rv3d->rflag & RV3D_ZOFFSET_DISABLED) {
return;
}
viewdist = rv3d->dist;
/* special exception for ortho camera (viewdist isnt used for perspective cameras) */
if (dist != 0.0f) {
if (rv3d->persp == RV3D_CAMOB) {
if (rv3d->is_persp == false) {
viewdist = 1.0f / max_ff(fabsf(rv3d->winmat[0][0]), fabsf(rv3d->winmat[1][1]));
}
}
}
bglPolygonOffset(viewdist, dist);
}
bool ED_view3d_context_activate(bContext *C)
{
bScreen *sc = CTX_wm_screen(C);
ScrArea *sa = CTX_wm_area(C);
ARegion *ar;
/* sa can be NULL when called from python */
if (sa == NULL || sa->spacetype != SPACE_VIEW3D) {
sa = BKE_screen_find_big_area(sc, SPACE_VIEW3D, 0);
}
if (sa == NULL) {
return false;
}
ar = BKE_area_find_region_active_win(sa);
if (ar == NULL) {
return false;
}
/* bad context switch .. */
CTX_wm_area_set(C, sa);
CTX_wm_region_set(C, ar);
return true;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Clipping Utilities
*
* \{ */
void ED_view3d_clipping_calc_from_boundbox(float clip[4][4], const BoundBox *bb, const bool is_flip)
{
int val;
for (val = 0; val < 4; val++) {
normal_tri_v3(clip[val], bb->vec[val], bb->vec[val == 3 ? 0 : val + 1], bb->vec[val + 4]);
if (UNLIKELY(is_flip)) {
negate_v3(clip[val]);
}
clip[val][3] = -dot_v3v3(clip[val], bb->vec[val]);
}
}
void ED_view3d_clipping_calc(BoundBox *bb, float planes[4][4], const ARegion *ar, const Object *ob, const rcti *rect)
{
/* init in case unproject fails */
memset(bb->vec, 0, sizeof(bb->vec));
/* four clipping planes and bounding volume */
/* first do the bounding volume */
for (int val = 0; val < 4; val++) {
float xs = (val == 0 || val == 3) ? rect->xmin : rect->xmax;
float ys = (val == 0 || val == 1) ? rect->ymin : rect->ymax;
ED_view3d_unproject(ar, xs, ys, 0.0, bb->vec[val]);
ED_view3d_unproject(ar, xs, ys, 1.0, bb->vec[4 + val]);
}
/* optionally transform to object space */
if (ob) {
float imat[4][4];
invert_m4_m4(imat, ob->obmat);
for (int val = 0; val < 8; val++) {
mul_m4_v3(imat, bb->vec[val]);
}
}
/* verify if we have negative scale. doing the transform before cross
* product flips the sign of the vector compared to doing cross product
* before transform then, so we correct for that. */
int flip_sign = (ob) ? is_negative_m4(ob->obmat) : false;
ED_view3d_clipping_calc_from_boundbox(planes, bb, flip_sign);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Bound-Box Utilities
*
* \{ */
static bool view3d_boundbox_clip_m4(const BoundBox *bb, float persmatob[4][4])
{
int a, flag = -1, fl;
for (a = 0; a < 8; a++) {
float vec[4], min, max;
copy_v3_v3(vec, bb->vec[a]);
vec[3] = 1.0;
mul_m4_v4(persmatob, vec);
max = vec[3];
min = -vec[3];
fl = 0;
if (vec[0] < min) fl += 1;
if (vec[0] > max) fl += 2;
if (vec[1] < min) fl += 4;
if (vec[1] > max) fl += 8;
if (vec[2] < min) fl += 16;
if (vec[2] > max) fl += 32;
flag &= fl;
if (flag == 0) return true;
}
return false;
}
bool ED_view3d_boundbox_clip_ex(const RegionView3D *rv3d, const BoundBox *bb, float obmat[4][4])
{
/* return 1: draw */
float persmatob[4][4];
if (bb == NULL) return true;
if (bb->flag & BOUNDBOX_DISABLED) return true;
mul_m4_m4m4(persmatob, (float(*)[4])rv3d->persmat, obmat);
return view3d_boundbox_clip_m4(bb, persmatob);
}
bool ED_view3d_boundbox_clip(RegionView3D *rv3d, const BoundBox *bb)
{
if (bb == NULL) return true;
if (bb->flag & BOUNDBOX_DISABLED) return true;
return view3d_boundbox_clip_m4(bb, rv3d->persmatob);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Perspective & Mode Switching
*
* Misc view utility functions.
* \{ */
bool ED_view3d_offset_lock_check(const View3D *v3d, const RegionView3D *rv3d)
{
return (rv3d->persp != RV3D_CAMOB) && (v3d->ob_centre_cursor || v3d->ob_centre);
}
/**
* Use to store the last view, before entering camera view.
*/
void ED_view3d_lastview_store(RegionView3D *rv3d)
{
copy_qt_qt(rv3d->lviewquat, rv3d->viewquat);
rv3d->lview = rv3d->view;
if (rv3d->persp != RV3D_CAMOB) {
rv3d->lpersp = rv3d->persp;
}
}
void ED_view3d_lock_clear(View3D *v3d)
{
v3d->ob_centre = NULL;
v3d->ob_centre_bone[0] = '\0';
v3d->ob_centre_cursor = false;
v3d->flag2 &= ~V3D_LOCK_CAMERA;
}
/**
* For viewport operators that exit camera perspective.
*
* \note This differs from simply setting ``rv3d->persp = persp`` because it
* sets the ``ofs`` and ``dist`` values of the viewport so it matches the camera,
* otherwise switching out of camera view may jump to a different part of the scene.
*/
void ED_view3d_persp_switch_from_camera(const Depsgraph *depsgraph, View3D *v3d, RegionView3D *rv3d, const char persp)
{
BLI_assert(rv3d->persp == RV3D_CAMOB);
BLI_assert(persp != RV3D_CAMOB);
if (v3d->camera) {
Object *ob_camera_eval = DEG_get_evaluated_object(depsgraph, v3d->camera);
rv3d->dist = ED_view3d_offset_distance(ob_camera_eval->obmat, rv3d->ofs, VIEW3D_DIST_FALLBACK);
ED_view3d_from_object(ob_camera_eval, rv3d->ofs, rv3d->viewquat, &rv3d->dist, NULL);
}
if (!ED_view3d_camera_lock_check(v3d, rv3d)) {
rv3d->persp = persp;
}
}
/**
* Action to take when rotating the view,
* handle auto-persp and logic for switching out of views.
*
* shared with NDOF.
*/
bool ED_view3d_persp_ensure(const Depsgraph *depsgraph, View3D *v3d, ARegion *ar)
{
RegionView3D *rv3d = ar->regiondata;
const bool autopersp = (U.uiflag & USER_AUTOPERSP) != 0;
BLI_assert((rv3d->viewlock & RV3D_LOCKED) == 0);
if (ED_view3d_camera_lock_check(v3d, rv3d))
return false;
if (rv3d->persp != RV3D_PERSP) {
if (rv3d->persp == RV3D_CAMOB) {
/* If autopersp and previous view was an axis one, switch back to PERSP mode, else reuse previous mode. */
char persp = (autopersp && RV3D_VIEW_IS_AXIS(rv3d->lview)) ? RV3D_PERSP : rv3d->lpersp;
ED_view3d_persp_switch_from_camera(depsgraph, v3d, rv3d, persp);
}
else if (autopersp && RV3D_VIEW_IS_AXIS(rv3d->view)) {
rv3d->persp = RV3D_PERSP;
}
return true;
}
return false;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Camera Lock API
*
* Lock the camera to the view-port, allowing view manipulation to transform the camera.
* \{ */
/**
* \return true when the view-port is locked to its camera.
*/
bool ED_view3d_camera_lock_check(const View3D *v3d, const RegionView3D *rv3d)
{
return ((v3d->camera) &&
(!ID_IS_LINKED(v3d->camera)) &&
(v3d->flag2 & V3D_LOCK_CAMERA) &&
(rv3d->persp == RV3D_CAMOB));
}
/**
* Apply the camera object transformation to the view-port.
* (needed so we can use regular view-port manipulation operators, that sync back to the camera).
*/
void ED_view3d_camera_lock_init_ex(const Depsgraph *depsgraph, View3D *v3d, RegionView3D *rv3d, const bool calc_dist)
{
if (ED_view3d_camera_lock_check(v3d, rv3d)) {
Object *ob_camera_eval = DEG_get_evaluated_object(depsgraph, v3d->camera);
if (calc_dist) {
/* using a fallback dist is OK here since ED_view3d_from_object() compensates for it */
rv3d->dist = ED_view3d_offset_distance(ob_camera_eval->obmat, rv3d->ofs, VIEW3D_DIST_FALLBACK);
}
ED_view3d_from_object(ob_camera_eval, rv3d->ofs, rv3d->viewquat, &rv3d->dist, NULL);
}
}
void ED_view3d_camera_lock_init(const Depsgraph *depsgraph, View3D *v3d, RegionView3D *rv3d)
{
ED_view3d_camera_lock_init_ex(depsgraph, v3d, rv3d, true);
}
/**
* Apply the view-port transformation back to the camera object.
*
* \return true if the camera is moved.
*/
bool ED_view3d_camera_lock_sync(const Depsgraph *depsgraph, View3D *v3d, RegionView3D *rv3d)
{
if (ED_view3d_camera_lock_check(v3d, rv3d)) {
ObjectTfmProtectedChannels obtfm;
Object *root_parent;
if ((U.uiflag & USER_CAM_LOCK_NO_PARENT) == 0 && (root_parent = v3d->camera->parent)) {
Object *ob_update;
float tmat[4][4];
float imat[4][4];
float view_mat[4][4];
float diff_mat[4][4];
float parent_mat[4][4];
while (root_parent->parent) {
root_parent = root_parent->parent;
}
Object *ob_camera_eval = DEG_get_evaluated_object(depsgraph, v3d->camera);
Object *root_parent_eval = DEG_get_evaluated_object(depsgraph, root_parent);
ED_view3d_to_m4(view_mat, rv3d->ofs, rv3d->viewquat, rv3d->dist);
normalize_m4_m4(tmat, ob_camera_eval->obmat);
invert_m4_m4(imat, tmat);
mul_m4_m4m4(diff_mat, view_mat, imat);
mul_m4_m4m4(parent_mat, diff_mat, root_parent_eval->obmat);
BKE_object_tfm_protected_backup(root_parent, &obtfm);
BKE_object_apply_mat4(root_parent, parent_mat, true, false);
BKE_object_tfm_protected_restore(root_parent, &obtfm, root_parent->protectflag);
ob_update = v3d->camera;
while (ob_update) {
DEG_id_tag_update(&ob_update->id, ID_RECALC_TRANSFORM);
WM_main_add_notifier(NC_OBJECT | ND_TRANSFORM, ob_update);
ob_update = ob_update->parent;
}
}
else {
/* always maintain the same scale */
const short protect_scale_all = (OB_LOCK_SCALEX | OB_LOCK_SCALEY | OB_LOCK_SCALEZ);
BKE_object_tfm_protected_backup(v3d->camera, &obtfm);
ED_view3d_to_object(depsgraph, v3d->camera, rv3d->ofs, rv3d->viewquat, rv3d->dist);
BKE_object_tfm_protected_restore(v3d->camera, &obtfm, v3d->camera->protectflag | protect_scale_all);
DEG_id_tag_update(&v3d->camera->id, ID_RECALC_TRANSFORM);
WM_main_add_notifier(NC_OBJECT | ND_TRANSFORM, v3d->camera);
}
return true;
}
else {
return false;
}
}
bool ED_view3d_camera_autokey(
Scene *scene, ID *id_key,
struct bContext *C, const bool do_rotate, const bool do_translate)
{
if (autokeyframe_cfra_can_key(scene, id_key)) {
const float cfra = (float)CFRA;
ListBase dsources = {NULL, NULL};
/* add data-source override for the camera object */
ANIM_relative_keyingset_add_source(&dsources, id_key, NULL, NULL);
/* insert keyframes
* 1) on the first frame
* 2) on each subsequent frame
* TODO: need to check in future that frame changed before doing this
*/
if (do_rotate) {
struct KeyingSet *ks = ANIM_get_keyingset_for_autokeying(scene, ANIM_KS_ROTATION_ID);
ANIM_apply_keyingset(C, &dsources, NULL, ks, MODIFYKEY_MODE_INSERT, cfra);
}
if (do_translate) {
struct KeyingSet *ks = ANIM_get_keyingset_for_autokeying(scene, ANIM_KS_LOCATION_ID);
ANIM_apply_keyingset(C, &dsources, NULL, ks, MODIFYKEY_MODE_INSERT, cfra);
}
/* free temp data */
BLI_freelistN(&dsources);
return true;
}
else {
return false;
}
}
/**
* Call after modifying a locked view.
*
* \note Not every view edit currently auto-keys (numpad for eg),
* this is complicated because of smoothview.
*/
bool ED_view3d_camera_lock_autokey(
View3D *v3d, RegionView3D *rv3d,
struct bContext *C, const bool do_rotate, const bool do_translate)
{
/* similar to ED_view3d_cameracontrol_update */
if (ED_view3d_camera_lock_check(v3d, rv3d)) {
Scene *scene = CTX_data_scene(C);
ID *id_key;
Object *root_parent;
if ((U.uiflag & USER_CAM_LOCK_NO_PARENT) == 0 && (root_parent = v3d->camera->parent)) {
while (root_parent->parent) {
root_parent = root_parent->parent;
}
id_key = &root_parent->id;
}
else {
id_key = &v3d->camera->id;
}
return ED_view3d_camera_autokey(scene, id_key, C, do_rotate, do_translate);
}
else {
return false;
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Box View Support
*
* Use with quad-split so each view is clipped by the bounds of each view axis.
* \{ */
static void view3d_boxview_clip(ScrArea *sa)
{
ARegion *ar;
BoundBox *bb = MEM_callocN(sizeof(BoundBox), "clipbb");
float clip[6][4];
float x1 = 0.0f, y1 = 0.0f, z1 = 0.0f, ofs[3] = {0.0f, 0.0f, 0.0f};
int val;
/* create bounding box */
for (ar = sa->regionbase.first; ar; ar = ar->next) {
if (ar->regiontype == RGN_TYPE_WINDOW) {
RegionView3D *rv3d = ar->regiondata;
if (rv3d->viewlock & RV3D_BOXCLIP) {
if (ELEM(rv3d->view, RV3D_VIEW_TOP, RV3D_VIEW_BOTTOM)) {
if (ar->winx > ar->winy) x1 = rv3d->dist;
else x1 = ar->winx * rv3d->dist / ar->winy;
if (ar->winx > ar->winy) y1 = ar->winy * rv3d->dist / ar->winx;
else y1 = rv3d->dist;
copy_v2_v2(ofs, rv3d->ofs);
}
else if (ELEM(rv3d->view, RV3D_VIEW_FRONT, RV3D_VIEW_BACK)) {
ofs[2] = rv3d->ofs[2];
if (ar->winx > ar->winy) z1 = ar->winy * rv3d->dist / ar->winx;
else z1 = rv3d->dist;
}
}
}
}
for (val = 0; val < 8; val++) {
if (ELEM(val, 0, 3, 4, 7))
bb->vec[val][0] = -x1 - ofs[0];
else
bb->vec[val][0] = x1 - ofs[0];
if (ELEM(val, 0, 1, 4, 5))
bb->vec[val][1] = -y1 - ofs[1];
else
bb->vec[val][1] = y1 - ofs[1];
if (val > 3)
bb->vec[val][2] = -z1 - ofs[2];
else
bb->vec[val][2] = z1 - ofs[2];
}
/* normals for plane equations */
normal_tri_v3(clip[0], bb->vec[0], bb->vec[1], bb->vec[4]);
normal_tri_v3(clip[1], bb->vec[1], bb->vec[2], bb->vec[5]);
normal_tri_v3(clip[2], bb->vec[2], bb->vec[3], bb->vec[6]);
normal_tri_v3(clip[3], bb->vec[3], bb->vec[0], bb->vec[7]);
normal_tri_v3(clip[4], bb->vec[4], bb->vec[5], bb->vec[6]);
normal_tri_v3(clip[5], bb->vec[0], bb->vec[2], bb->vec[1]);
/* then plane equations */
for (val = 0; val < 6; val++) {
clip[val][3] = -dot_v3v3(clip[val], bb->vec[val % 5]);
}
/* create bounding box */
for (ar = sa->regionbase.first; ar; ar = ar->next) {
if (ar->regiontype == RGN_TYPE_WINDOW) {
RegionView3D *rv3d = ar->regiondata;
if (rv3d->viewlock & RV3D_BOXCLIP) {
rv3d->rflag |= RV3D_CLIPPING;
memcpy(rv3d->clip, clip, sizeof(clip));
if (rv3d->clipbb) MEM_freeN(rv3d->clipbb);
rv3d->clipbb = MEM_dupallocN(bb);
}
}
}
MEM_freeN(bb);
}
/**
* Find which axis values are shared between both views and copy to \a rv3d_dst
* taking axis flipping into account.
*/
static void view3d_boxview_sync_axis(RegionView3D *rv3d_dst, RegionView3D *rv3d_src)
{
/* absolute axis values above this are considered to be set (will be ~1.0f) */
const float axis_eps = 0.5f;
float viewinv[4];
/* use the view rotation to identify which axis to sync on */
float view_axis_all[4][3] = {
{1.0f, 0.0f, 0.0f},
{0.0f, 1.0f, 0.0f},
{1.0f, 0.0f, 0.0f},
{0.0f, 1.0f, 0.0f}};
float *view_src_x = &view_axis_all[0][0];
float *view_src_y = &view_axis_all[1][0];
float *view_dst_x = &view_axis_all[2][0];
float *view_dst_y = &view_axis_all[3][0];
int i;
/* we could use rv3d->viewinv, but better not depend on view matrix being updated */
if (UNLIKELY(ED_view3d_quat_from_axis_view(rv3d_src->view, viewinv) == false)) {
return;
}
invert_qt_normalized(viewinv);
mul_qt_v3(viewinv, view_src_x);
mul_qt_v3(viewinv, view_src_y);
if (UNLIKELY(ED_view3d_quat_from_axis_view(rv3d_dst->view, viewinv) == false)) {
return;
}
invert_qt_normalized(viewinv);
mul_qt_v3(viewinv, view_dst_x);
mul_qt_v3(viewinv, view_dst_y);
/* check source and dest have a matching axis */
for (i = 0; i < 3; i++) {
if (((fabsf(view_src_x[i]) > axis_eps) || (fabsf(view_src_y[i]) > axis_eps)) &&
((fabsf(view_dst_x[i]) > axis_eps) || (fabsf(view_dst_y[i]) > axis_eps)))
{
rv3d_dst->ofs[i] = rv3d_src->ofs[i];
}
}
}
/* sync center/zoom view of region to others, for view transforms */
void view3d_boxview_sync(ScrArea *sa, ARegion *ar)
{
ARegion *artest;
RegionView3D *rv3d = ar->regiondata;
short clip = 0;
for (artest = sa->regionbase.first; artest; artest = artest->next) {
if (artest != ar && artest->regiontype == RGN_TYPE_WINDOW) {
RegionView3D *rv3dtest = artest->regiondata;
if (rv3dtest->viewlock & RV3D_LOCKED) {
rv3dtest->dist = rv3d->dist;
view3d_boxview_sync_axis(rv3dtest, rv3d);
clip |= rv3dtest->viewlock & RV3D_BOXCLIP;
ED_region_tag_redraw(artest);
}
}
}
if (clip) {
view3d_boxview_clip(sa);
}
}
/* for home, center etc */
void view3d_boxview_copy(ScrArea *sa, ARegion *ar)
{
ARegion *artest;
RegionView3D *rv3d = ar->regiondata;
bool clip = false;
for (artest = sa->regionbase.first; artest; artest = artest->next) {
if (artest != ar && artest->regiontype == RGN_TYPE_WINDOW) {
RegionView3D *rv3dtest = artest->regiondata;
if (rv3dtest->viewlock) {
rv3dtest->dist = rv3d->dist;
copy_v3_v3(rv3dtest->ofs, rv3d->ofs);
ED_region_tag_redraw(artest);
clip |= ((rv3dtest->viewlock & RV3D_BOXCLIP) != 0);
}
}
}
if (clip) {
view3d_boxview_clip(sa);
}
}
/* 'clip' is used to know if our clip setting has changed */
void ED_view3d_quadview_update(ScrArea *sa, ARegion *ar, bool do_clip)
{
ARegion *ar_sync = NULL;
RegionView3D *rv3d = ar->regiondata;
short viewlock;
/* this function copies flags from the first of the 3 other quadview
* regions to the 2 other, so it assumes this is the region whose
* properties are always being edited, weak */
viewlock = rv3d->viewlock;
if ((viewlock & RV3D_LOCKED) == 0) {
do_clip = (viewlock & RV3D_BOXCLIP) != 0;
viewlock = 0;
}
else if ((viewlock & RV3D_BOXVIEW) == 0 && (viewlock & RV3D_BOXCLIP) != 0) {
do_clip = true;
viewlock &= ~RV3D_BOXCLIP;
}
for (; ar; ar = ar->prev) {
if (ar->alignment == RGN_ALIGN_QSPLIT) {
rv3d = ar->regiondata;
rv3d->viewlock = viewlock;
if (do_clip && (viewlock & RV3D_BOXCLIP) == 0) {
rv3d->rflag &= ~RV3D_BOXCLIP;
}
/* use ar_sync so we sync with one of the aligned views below
* else the view jumps on changing view settings like 'clip'
* since it copies from the perspective view */
ar_sync = ar;
}
}
if (rv3d->viewlock & RV3D_BOXVIEW) {
view3d_boxview_sync(sa, ar_sync ? ar_sync : sa->regionbase.last);
}
/* ensure locked regions have an axis, locked user views don't make much sense */
if (viewlock & RV3D_LOCKED) {
int index_qsplit = 0;
for (ar = sa->regionbase.first; ar; ar = ar->next) {
if (ar->alignment == RGN_ALIGN_QSPLIT) {
rv3d = ar->regiondata;
if (rv3d->viewlock) {
if (!RV3D_VIEW_IS_AXIS(rv3d->view)) {
rv3d->view = ED_view3d_lock_view_from_index(index_qsplit);
rv3d->persp = RV3D_ORTHO;
ED_view3d_lock(rv3d);
}
}
index_qsplit++;
}
}
}
ED_area_tag_redraw(sa);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Auto-Depth Utilities
* \{ */
static float view_autodist_depth_margin(ARegion *ar, const int mval[2], int margin)
{
ViewDepths depth_temp = {0};
rcti rect;
float depth_close;
if (margin == 0) {
/* Get Z Depths, needed for perspective, nice for ortho */
rect.xmin = mval[0];
rect.ymin = mval[1];
rect.xmax = mval[0] + 1;
rect.ymax = mval[1] + 1;
}
else {
BLI_rcti_init_pt_radius(&rect, mval, margin);
}
view3d_update_depths_rect(ar, &depth_temp, &rect);
depth_close = view3d_depth_near(&depth_temp);
MEM_SAFE_FREE(depth_temp.depths);
return depth_close;
}
/**
* Get the world-space 3d location from a screen-space 2d point.
*
* \param mval: Input screen-space pixel location.
* \param mouse_worldloc: Output world-space location.
* \param fallback_depth_pt: Use this points depth when no depth can be found.
*/
bool ED_view3d_autodist(
Depsgraph *depsgraph, ARegion *ar, View3D *v3d,
const int mval[2], float mouse_worldloc[3],
const bool alphaoverride, const float fallback_depth_pt[3])
{
float depth_close;
int margin_arr[] = {0, 2, 4};
int i;
bool depth_ok = false;
/* Get Z Depths, needed for perspective, nice for ortho */
ED_view3d_draw_depth(depsgraph, ar, v3d, alphaoverride);
/* Attempt with low margin's first */
i = 0;
do {
depth_close = view_autodist_depth_margin(ar, mval, margin_arr[i++] * U.pixelsize);
depth_ok = (depth_close != FLT_MAX);
} while ((depth_ok == false) && (i < ARRAY_SIZE(margin_arr)));
if (depth_ok) {
float centx = (float)mval[0] + 0.5f;
float centy = (float)mval[1] + 0.5f;
if (ED_view3d_unproject(ar, centx, centy, depth_close, mouse_worldloc)) {
return true;
}
}
if (fallback_depth_pt) {
ED_view3d_win_to_3d_int(v3d, ar, fallback_depth_pt, mval, mouse_worldloc);
return true;
}
else {
return false;
}
}
void ED_view3d_autodist_init(Depsgraph *depsgraph,
ARegion *ar, View3D *v3d, int mode)
{
/* Get Z Depths, needed for perspective, nice for ortho */
switch (mode) {
case 0:
ED_view3d_draw_depth(depsgraph, ar, v3d, true);
break;
case 1:
{
Scene *scene = DEG_get_evaluated_scene(depsgraph);
ED_view3d_draw_depth_gpencil(depsgraph, scene, ar, v3d);
break;
}
}
}
/* no 4x4 sampling, run #ED_view3d_autodist_init first */
bool ED_view3d_autodist_simple(ARegion *ar, const int mval[2], float mouse_worldloc[3],
int margin, float *force_depth)
{
float depth;
/* Get Z Depths, needed for perspective, nice for ortho */
if (force_depth)
depth = *force_depth;
else
depth = view_autodist_depth_margin(ar, mval, margin);
if (depth == FLT_MAX)
return false;
float centx = (float)mval[0] + 0.5f;
float centy = (float)mval[1] + 0.5f;
return ED_view3d_unproject(ar, centx, centy, depth, mouse_worldloc);
}
bool ED_view3d_autodist_depth(ARegion *ar, const int mval[2], int margin, float *depth)
{
*depth = view_autodist_depth_margin(ar, mval, margin);
return (*depth != FLT_MAX);
}
static bool depth_segment_cb(int x, int y, void *userData)
{
struct { ARegion *ar; int margin; float depth; } *data = userData;
int mval[2];
float depth;
mval[0] = x;
mval[1] = y;
depth = view_autodist_depth_margin(data->ar, mval, data->margin);
if (depth != FLT_MAX) {
data->depth = depth;
return 0;
}
else {
return 1;
}
}
bool ED_view3d_autodist_depth_seg(
ARegion *ar, const int mval_sta[2], const int mval_end[2],
int margin, float *depth)
{
struct { ARegion *ar; int margin; float depth; } data = {NULL};
int p1[2];
int p2[2];
data.ar = ar;
data.margin = margin;
data.depth = FLT_MAX;
copy_v2_v2_int(p1, mval_sta);
copy_v2_v2_int(p2, mval_end);
BLI_bitmap_draw_2d_line_v2v2i(p1, p2, depth_segment_cb, &data);
*depth = data.depth;
return (*depth != FLT_MAX);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Radius/Distance Utilities
*
* Use to calculate a distance to a point based on it's radius.
* \{ */
float ED_view3d_radius_to_dist_persp(const float angle, const float radius)
{
return radius * (1.0f / tanf(angle / 2.0f));
}
float ED_view3d_radius_to_dist_ortho(const float lens, const float radius)
{
return radius / (DEFAULT_SENSOR_WIDTH / lens);
}
/**
* Return a new RegionView3D.dist value to fit the \a radius.
*
* \note Depth isn't taken into account, this will fit a flat plane exactly,
* but points towards the view (with a perspective projection),
* may be within the radius but outside the view. eg:
*
* <pre>
* +
* pt --> + /^ radius
* / |
* / |
* view + +
* \ |
* \ |
* \|
* +
* </pre>
*
* \param ar Can be NULL if \a use_aspect is false.
* \param persp Allow the caller to tell what kind of perspective to use (ortho/view/camera)
* \param use_aspect Increase the distance to account for non 1:1 view aspect.
* \param radius The radius will be fitted exactly, typically pre-scaled by a margin (#VIEW3D_MARGIN).
*/
float ED_view3d_radius_to_dist(
const View3D *v3d, const ARegion *ar,
const struct Depsgraph *depsgraph,
const char persp, const bool use_aspect,
const float radius)
{
float dist;
BLI_assert(ELEM(persp, RV3D_ORTHO, RV3D_PERSP, RV3D_CAMOB));
BLI_assert((persp != RV3D_CAMOB) || v3d->camera);
if (persp == RV3D_ORTHO) {
dist = ED_view3d_radius_to_dist_ortho(v3d->lens, radius);
}
else {
float lens, sensor_size, zoom;
float angle;
if (persp == RV3D_CAMOB) {
CameraParams params;
BKE_camera_params_init(¶ms);
params.clipsta = v3d->near;
params.clipend = v3d->far;
Object *camera_eval = DEG_get_evaluated_object(depsgraph, v3d->camera);
BKE_camera_params_from_object(¶ms, camera_eval);
lens = params.lens;
sensor_size = BKE_camera_sensor_size(params.sensor_fit, params.sensor_x, params.sensor_y);
/* ignore 'rv3d->camzoom' because we want to fit to the cameras frame */
zoom = CAMERA_PARAM_ZOOM_INIT_CAMOB;
}
else {
lens = v3d->lens;
sensor_size = DEFAULT_SENSOR_WIDTH;
zoom = CAMERA_PARAM_ZOOM_INIT_PERSP;
}
angle = focallength_to_fov(lens, sensor_size);
/* zoom influences lens, correct this by scaling the angle as a distance (by the zoom-level) */
angle = atanf(tanf(angle / 2.0f) * zoom) * 2.0f;
dist = ED_view3d_radius_to_dist_persp(angle, radius);
}
if (use_aspect) {
const RegionView3D *rv3d = ar->regiondata;
float winx, winy;
if (persp == RV3D_CAMOB) {
/* camera frame x/y in pixels */
winx = ar->winx / rv3d->viewcamtexcofac[0];
winy = ar->winy / rv3d->viewcamtexcofac[1];
}
else {
winx = ar->winx;
winy = ar->winy;
}
if (winx && winy) {
float aspect = winx / winy;
if (aspect < 1.0f) {
aspect = 1.0f / aspect;
}
dist *= aspect;
}
}
return dist;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Distance Utilities
* \{ */
/* problem - ofs[3] can be on same location as camera itself.
* Blender needs proper dist value for zoom.
* use fallback_dist to override small values
*/
float ED_view3d_offset_distance(float mat[4][4], const float ofs[3], const float fallback_dist)
{
float pos[4] = {0.0f, 0.0f, 0.0f, 1.0f};
float dir[4] = {0.0f, 0.0f, 1.0f, 0.0f};
float dist;
mul_m4_v4(mat, pos);
add_v3_v3(pos, ofs);
mul_m4_v4(mat, dir);
normalize_v3(dir);
dist = dot_v3v3(pos, dir);
if ((dist < FLT_EPSILON) && (fallback_dist != 0.0f)) {
dist = fallback_dist;
}
return dist;
}
/**
* Set the dist without moving the view (compensate with #RegionView3D.ofs)
*
* \note take care that viewinv is up to date, #ED_view3d_update_viewmat first.
*/
void ED_view3d_distance_set(RegionView3D *rv3d, const float dist)
{
float viewinv[4];
float tvec[3];
BLI_assert(dist >= 0.0f);
copy_v3_fl3(tvec, 0.0f, 0.0f, rv3d->dist - dist);
/* rv3d->viewinv isn't always valid */
#if 0
mul_mat3_m4_v3(rv3d->viewinv, tvec);
#else
invert_qt_qt_normalized(viewinv, rv3d->viewquat);
mul_qt_v3(viewinv, tvec);
#endif
sub_v3_v3(rv3d->ofs, tvec);
rv3d->dist = dist;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Axis Utilities
* \{ */
static float view3d_quat_axis[6][4] = {
{M_SQRT1_2, -M_SQRT1_2, 0.0f, 0.0f}, /* RV3D_VIEW_FRONT */
{0.0f, 0.0f, -M_SQRT1_2, -M_SQRT1_2}, /* RV3D_VIEW_BACK */
{0.5f, -0.5f, 0.5f, 0.5f}, /* RV3D_VIEW_LEFT */
{0.5f, -0.5f, -0.5f, -0.5f}, /* RV3D_VIEW_RIGHT */
{1.0f, 0.0f, 0.0f, 0.0f}, /* RV3D_VIEW_TOP */
{0.0f, -1.0f, 0.0f, 0.0f}, /* RV3D_VIEW_BOTTOM */
};
bool ED_view3d_quat_from_axis_view(const char view, float quat[4])
{
if (RV3D_VIEW_IS_AXIS(view)) {
copy_qt_qt(quat, view3d_quat_axis[view - RV3D_VIEW_FRONT]);
return true;
}
else {
return false;
}
}
char ED_view3d_quat_to_axis_view(const float quat[4], const float epsilon)
{
/* quat values are all unit length */
char view;
for (view = RV3D_VIEW_FRONT; view <= RV3D_VIEW_BOTTOM; view++) {
if (fabsf(angle_signed_qtqt(quat, view3d_quat_axis[view - RV3D_VIEW_FRONT])) < epsilon) {
return view;
}
}
return RV3D_VIEW_USER;
}
char ED_view3d_lock_view_from_index(int index)
{
switch (index) {
case 0: return RV3D_VIEW_FRONT;
case 1: return RV3D_VIEW_TOP;
case 2: return RV3D_VIEW_RIGHT;
default: return RV3D_VIEW_USER;
}
}
char ED_view3d_axis_view_opposite(char view)
{
switch (view) {
case RV3D_VIEW_FRONT: return RV3D_VIEW_BACK;
case RV3D_VIEW_BACK: return RV3D_VIEW_FRONT;
case RV3D_VIEW_LEFT: return RV3D_VIEW_RIGHT;
case RV3D_VIEW_RIGHT: return RV3D_VIEW_LEFT;
case RV3D_VIEW_TOP: return RV3D_VIEW_BOTTOM;
case RV3D_VIEW_BOTTOM: return RV3D_VIEW_TOP;
}
return RV3D_VIEW_USER;
}
bool ED_view3d_lock(RegionView3D *rv3d)
{
return ED_view3d_quat_from_axis_view(rv3d->view, rv3d->viewquat);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name View Transform Utilities
* \{ */
/**
* Set the view transformation from a 4x4 matrix.
*
* \param mat The view 4x4 transformation matrix to assign.
* \param ofs The view offset, normally from RegionView3D.ofs.
* \param quat The view rotation, quaternion normally from RegionView3D.viewquat.
* \param dist The view distance from ofs, normally from RegionView3D.dist.
*/
void ED_view3d_from_m4(const float mat[4][4], float ofs[3], float quat[4], float *dist)
{
float nmat[3][3];
/* dist depends on offset */
BLI_assert(dist == NULL || ofs != NULL);
copy_m3_m4(nmat, mat);
normalize_m3(nmat);
/* Offset */
if (ofs)
negate_v3_v3(ofs, mat[3]);
/* Quat */
if (quat) {
mat3_normalized_to_quat(quat, nmat);
invert_qt_normalized(quat);
}
if (ofs && dist) {
madd_v3_v3fl(ofs, nmat[2], *dist);
}
}
/**
* Calculate the view transformation matrix from RegionView3D input.
* The resulting matrix is equivalent to RegionView3D.viewinv
* \param mat The view 4x4 transformation matrix to calculate.
* \param ofs The view offset, normally from RegionView3D.ofs.
* \param quat The view rotation, quaternion normally from RegionView3D.viewquat.
* \param dist The view distance from ofs, normally from RegionView3D.dist.
*/
void ED_view3d_to_m4(float mat[4][4], const float ofs[3], const float quat[4], const float dist)
{
float iviewquat[4] = {-quat[0], quat[1], quat[2], quat[3]};
float dvec[3] = {0.0f, 0.0f, dist};
quat_to_mat4(mat, iviewquat);
mul_mat3_m4_v3(mat, dvec);
sub_v3_v3v3(mat[3], dvec, ofs);
}
/**
* Set the RegionView3D members from an objects transformation and optionally lens.
* \param depsgraph The depsgraph to get the evaluated object for the lens calculation.
* \param ob The object to set the view to.
* \param ofs The view offset to be set, normally from RegionView3D.ofs.
* \param quat The view rotation to be set, quaternion normally from RegionView3D.viewquat.
* \param dist The view distance from ofs to be set, normally from RegionView3D.dist.
* \param lens The view lens angle set for cameras and lamps, normally from View3D.lens.
*/
void ED_view3d_from_object(const Object *ob, float ofs[3], float quat[4], float *dist, float *lens)
{
ED_view3d_from_m4(ob->obmat, ofs, quat, dist);
if (lens) {
CameraParams params;
BKE_camera_params_init(¶ms);
BKE_camera_params_from_object(¶ms, ob);
*lens = params.lens;
}
}
/**
* Set the object transformation from RegionView3D members.
* \param depsgraph The depsgraph to get the evaluated object parent for the transformation calculation.
* \param ob The object which has the transformation assigned.
* \param ofs The view offset, normally from RegionView3D.ofs.
* \param quat The view rotation, quaternion normally from RegionView3D.viewquat.
* \param dist The view distance from ofs, normally from RegionView3D.dist.
*/
void ED_view3d_to_object(const Depsgraph *depsgraph, Object *ob, const float ofs[3], const float quat[4], const float dist)
{
float mat[4][4];
ED_view3d_to_m4(mat, ofs, quat, dist);
Object *ob_eval = DEG_get_evaluated_object(depsgraph, ob);
BKE_object_apply_mat4_ex(ob, mat, ob_eval->parent, ob_eval->parentinv, true);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Depth Buffer Utilities
* \{ */
float ED_view3d_depth_read_cached(const ViewContext *vc, const int mval[2])
{
ViewDepths *vd = vc->rv3d->depths;
int x = mval[0];
int y = mval[1];
if (vd && vd->depths && x > 0 && y > 0 && x < vd->w && y < vd->h) {
return vd->depths[y * vd->w + x];
}
else {
BLI_assert(1.0 <= vd->depth_range[1]);
return 1.0f;
}
}
bool ED_view3d_depth_read_cached_normal(
const ViewContext *vc, const int mval[2],
float r_normal[3])
{
/* Note: we could support passing in a radius.
* For now just read 9 pixels. */
/* pixels surrounding */
bool depths_valid[9] = {false};
float coords[9][3] = {{0}};
ARegion *ar = vc->ar;
const ViewDepths *depths = vc->rv3d->depths;
for (int x = 0, i = 0; x < 2; x++) {
for (int y = 0; y < 2; y++) {
const int mval_ofs[2] = {mval[0] + (x - 1), mval[1] + (y - 1)};
const double depth = (double)ED_view3d_depth_read_cached(vc, mval_ofs);
if ((depth > depths->depth_range[0]) && (depth < depths->depth_range[1])) {
if (ED_view3d_depth_unproject(ar, mval_ofs, depth, coords[i])) {
depths_valid[i] = true;
}
}
i++;
}
}
const int edges[2][6][2] = {
/* x edges */
{{0, 1}, {1, 2},
{3, 4}, {4, 5},
{6, 7}, {7, 8}},
/* y edges */
{{0, 3}, {3, 6},
{1, 4}, {4, 7},
{2, 5}, {5, 8}},
};
float cross[2][3] = {{0.0f}};
for (int i = 0; i < 6; i++) {
for (int axis = 0; axis < 2; axis++) {
if (depths_valid[edges[axis][i][0]] && depths_valid[edges[axis][i][1]]) {
float delta[3];
sub_v3_v3v3(delta, coords[edges[axis][i][0]], coords[edges[axis][i][1]]);
add_v3_v3(cross[axis], delta);
}
}
}
cross_v3_v3v3(r_normal, cross[0], cross[1]);
if (normalize_v3(r_normal) != 0.0f) {
return true;
}
else {
return false;
}
}
bool ED_view3d_depth_unproject(
const ARegion *ar,
const int mval[2], const double depth,
float r_location_world[3])
{
float centx = (float)mval[0] + 0.5f;
float centy = (float)mval[1] + 0.5f;
return ED_view3d_unproject(ar, centx, centy, depth, r_location_world);
}
void ED_view3d_depth_tag_update(RegionView3D *rv3d)
{
if (rv3d->depths)
rv3d->depths->damaged = true;
}
/** \} */
|