-
-
Notifications
You must be signed in to change notification settings - Fork 66
/
drawing.cpp
2975 lines (2568 loc) · 86.6 KB
/
drawing.cpp
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
// Hyperbolic Rogue -- rendering
// Copyright (C) 2011-2019 Zeno Rogue, see 'hyper.cpp' for details
/** \file drawing.cpp
* \brief Rendering shapes (dqi_draw), queue of shapes to render (ptds), etc.
*/
#include "hyper.h"
namespace hr {
#if HDR
static constexpr int POLY_DRAWLINES = 1; // draw the lines
static constexpr int POLY_DRAWAREA = 2; // draw the area
static constexpr int POLY_INVERSE = 4; // draw the inverse -- useful in stereographic projection
static constexpr int POLY_ISSIDE = 8; // never draw in inverse
static constexpr int POLY_BEHIND = 16; // there are points behind the camera
static constexpr int POLY_TOOLARGE = 32; // some coordinates are too large -- best not to draw to avoid glitches
static constexpr int POLY_INFRONT = 64; // on the sphere (orthogonal projection), do not draw without any points in front
static constexpr int POLY_HASWALLS = 128; // floor shapes which have their sidewalls
static constexpr int POLY_PLAIN = 256; // plain floors
static constexpr int POLY_FULL = 512; // full floors
static constexpr int POLY_HASSHADOW = 1024; // floor shapes which have their shadows, or can use shFloorShadow
static constexpr int POLY_GP = 2048; // Goldberg shapes
static constexpr int POLY_VCONVEX = 4096; // Convex shape (vertex)
static constexpr int POLY_CCONVEX = 8192; // Convex shape (central)
static constexpr int POLY_CENTERIN = 16384; // new system of side checking
static constexpr int POLY_FORCEWIDE = (1<<15); // force wide lines
static constexpr int POLY_NOTINFRONT = (1<<16); // points not in front
static constexpr int POLY_NIF_ERROR = (1<<17); // points moved to the outline cross the image, disable
static constexpr int POLY_BADCENTERIN = (1<<18); // new system of side checking
static constexpr int POLY_PRECISE_WIDE = (1<<19); // precise width calculation
static constexpr int POLY_FORCE_INVERTED = (1<<20); // force inverted
static constexpr int POLY_ALWAYS_IN = (1<<21); // always draw this
static constexpr int POLY_TRIANGLES = (1<<22); // made of TRIANGLES, not TRIANGLE_FAN
static constexpr int POLY_INTENSE = (1<<23); // extra intense colors
static constexpr int POLY_DEBUG = (1<<24); // debug this shape
static constexpr int POLY_PRINTABLE = (1<<25); // these walls are printable
static constexpr int POLY_FAT = (1<<26); // fatten this model in WRL export (used for Rug)
static constexpr int POLY_SHADE_TEXTURE = (1<<27); // texture has 'z' coordinate for shading
static constexpr int POLY_ONE_LEVEL = (1<<28); // only one level of the universal cover in SL(2,R)
static constexpr int POLY_APEIROGONAL = (1<<29); // only vertices indexed up to she are drawn as the boundary
static constexpr int POLY_NO_FOG = (1<<30); // disable fog for this
/** \brief A graphical element that can be drawn. Objects are not drawn immediately but rather queued.
*
* HyperRogue map rendering functions do not draw its data immediately; instead, they call the 'queue' functions
* which store the data to draw in hr::ptds. This approach lets us draw the elements in the correct order.
*/
struct drawqueueitem {
/** \brief The higher the priority, the earlier we should draw this object. */
PPR prio;
/** \brief Color of this object. */
color_t color;
/** \brief Some priorities need extra sorting inside the given class. This attribute is used to specify the inner sorting priority. */
int subprio;
/** \brief Draw the object. */
virtual void draw() = 0;
/** \brief Draw the object as background. */
virtual void draw_back() {}
virtual ~drawqueueitem() = default;
/** \brief When minimizing OpenGL calls, we need to group items of the same color, etc. together. This value is used as an extra sorting key. */
virtual color_t outline_group() = 0;
};
/** \brief Drawqueueitem used to draw polygons. The majority of drawqueueitems fall here. */
struct dqi_poly : drawqueueitem {
/** \brief matrix used to transform the model */
shiftmatrix V;
/** \brief a vector of GL vertices where the model is stored */
const vector<glvertex> *tab;
/** \brief the where does the model start */
int offset;
/** \brief how many vertices in the model */
int cnt;
/** cnt for POLY_APEIROGONAL */
int apeiro_cnt;
/** \brief the offset in the texture vertices */
int offset_texture;
/** \brief outline color */
color_t outline;
/** \brief width of boundary lines */
double linewidth;
/** \brief various flags */
int flags;
/** \brief Texture data for textured polygons. Requires POLY_TRIANGLES flag */
struct basic_textureinfo *tinf;
/** \brief used to find the correct side to draw in spherical geometries */
hyperpoint intester;
/** \brief temporarily cached data */
float cache;
void draw() override;
#if CAP_GL
void gldraw();
#endif
void draw_back() override;
color_t outline_group() override { return outline; }
};
/** \brief Drawqueueitem used to draw lines */
struct dqi_line : drawqueueitem {
/** \brief starting and ending point */
shiftpoint H1, H2;
/** \brief how accurately to render the line */
int prf;
/** \brief width of this line */
double width;
void draw() override;
void draw_back() override;
color_t outline_group() override { return color; }
};
/** \brief Drawqueueitem used to draw strings, using sccreen coodinates */
struct dqi_string : drawqueueitem {
/** \brief text */
string str;
/** onscreen position */
int x, y;
/** shift in anaglyph mode */
int shift;
/** font size */
int size;
/** frame color */
int frame;
/** alignment (0-8-16) */
int align;
void draw() override;
color_t outline_group() override { return 1; }
};
/** Drawqueueitem used to draw circles, using screen coordinates */
struct dqi_circle : drawqueueitem {
/** \brief onscreen position */
int x, y;
/** \brief circle size */
int size;
/** \brief which color should it be filled with */
color_t fillcolor;
/** \brief width of the circle */
double linewidth;
void draw() override;
color_t outline_group() override { return 2; }
};
/** \brief Perform an arbitrary action. May temporarily change the model, etc. */
struct dqi_action : drawqueueitem {
reaction_t action;
explicit dqi_action(const reaction_t& a) : action(a) {}
void draw() override { action(); }
color_t outline_group() override { return 2; }
};
#endif
EX bool in_vr_sphere;
hyperpoint vr_sphere_center;
bool fatborder;
EX color_t poly_outline;
EX vector<unique_ptr<drawqueueitem>> ptds;
#if CAP_GL
EX color_t text_color;
EX int text_shift;
EX GLuint text_texture;
EX int texts_merged;
EX int shapes_merged;
#if MINIMIZE_GL_CALLS
PPR lprio;
ld m_shift;
vector<glhr::colored_vertex> triangle_vertices;
vector<glhr::colored_vertex> line_vertices;
#endif
EX void glflush() {
DEBBI(DF_GRAPH, ("glflush"));
#if MINIMIZE_GL_CALLS
if(isize(triangle_vertices)) {
// printf("%3d | %d shapes, %d/%d vertices\n", lprio, shapes_merged, isize(triangle_vertices), isize(line_vertices));
current_display->next_shader_flags = GF_VARCOLOR;
current_display->set_all(0, m_shift);
if(true) {
glhr::be_nontextured();
glapplymatrix(Id);
glhr::current_vertices = NULL;
glhr::prepare(triangle_vertices);
glhr::color2(0xFFFFFFFF);
glDrawArrays(GL_TRIANGLES, 0, isize(triangle_vertices));
}
triangle_vertices.clear();
if(isize(line_vertices)) goto jump;
}
if(isize(line_vertices)) {
current_display->next_shader_flags = GF_VARCOLOR;
current_display->set_all(0, m_shift);
jump:
if(true) {
glhr::be_nontextured();
glapplymatrix(Id);
glhr::current_vertices = NULL;
glhr::prepare(line_vertices);
glhr::color2(0xFFFFFFFF);
glDrawArrays(GL_LINES, 0, isize(line_vertices));
}
line_vertices.clear();
}
shapes_merged = 0;
#endif
if(isize(text_vertices)) {
current_display->next_shader_flags = GF_TEXTURE;
dynamicval<eModel> m(pmodel, mdPixel);
if(!svg::in) current_display->set_all(0,0);
auto drawer = [] {
glhr::color2(text_color);
glBindTexture(GL_TEXTURE_2D, text_texture);
glhr::set_depthtest(false);
glhr::current_vertices = NULL;
glhr::prepare(text_vertices);
glDrawArrays(GL_TRIANGLES, 0, isize(text_vertices));
};
#if CAP_VR
if(vrhr::should_render() && vrhr::in_menu())
vrhr::in_vr_ui(drawer);
else
#endif
for(int ed = (current_display->separate_eyes() && text_shift)?-1:0; ed<2; ed+=2) {
glhr::set_modelview(glhr::translate(-ed*text_shift-current_display->xcenter,-current_display->ycenter, 0));
current_display->set_mask(ed);
drawer();
GLERR("print");
}
if(current_display->separate_eyes() && text_shift && !svg::in) current_display->set_mask(0);
texts_merged = 0;
text_vertices.clear();
}
}
#endif
#if CAP_SDL && !ISMOBILE
SDL_Surface *aux;
#if CAP_SDL2
SDL_Renderer *auxrend;
#else
#define auxrend aux
#endif
#endif
#if CAP_POLY
#if HDR
#define POLYMAX 60000
#endif
EX vector<glvertex> glcoords;
#endif
EX int spherespecial, spherephase;
#if CAP_POLY
int polyi;
EX int polyx[POLYMAX], polyxr[POLYMAX], polyy[POLYMAX];
int poly_flags;
void add1(const hyperpoint& H) {
glcoords.push_back(glhr::pointtogl(H));
}
int axial_sign() {
return ((axial_x ^ axial_y)&1) ? -1:1;
}
bool is_behind(const hyperpoint& H) {
if(pmodel == mdAxial && sphere) return axial_sign() * H[2] <= BEHIND_LIMIT;
if(in_vr_sphere) return false;
return pmodel == mdDisk && (hyperbolic ? H[2] >= 0 : true) && (nonisotropic ? false : pconf.alpha + H[2] <= BEHIND_LIMIT);
}
hyperpoint be_just_on_view(const hyperpoint& H1, const hyperpoint &H2) {
// H1[2] * t + H2[2] * (1-t) == BEHIND_LIMIT - pconf.alpha
// H2[2]- BEHIND_LIMIT + pconf.alpha = t * (H2[2] - H1[2])
ld t = (axial_sign() * H2[2] - BEHIND_LIMIT + (pmodel == mdAxial ? 0 : pconf.alpha)) / (H2[2] - H1[2]) * axial_sign();
return H1 * t + H2 * (1-t);
}
bool last_infront;
bool nif_error_in(ld x1, ld y1, ld x2, ld y2) {
return pow(x1 * x2 + y2 * y2, 2) < (x1*x1+y1*y1)*(x2*x2+y2*y2)*.5;
}
bool knowgood;
hyperpoint goodpoint;
vector<pair<int, hyperpoint>> tofix;
EX bool two_sided_model() {
#if CAP_VR
bool in_vr = vrhr::rendering();
#else
constexpr bool in_vr = false;
#endif
if(GDIM == 3) return false;
if(in_vr_sphere) return true;
if(pmodel == mdHemisphere || pmodel == mdHyperboloid) return !in_vr;
// if(pmodel == mdHemisphere) return true;
if(pmodel == mdDisk) return sphere || (hyperbolic && pconf.alpha < 0 && pconf.alpha > -1);
if(pmodel == mdRetroLittrow) return sphere;
if(pmodel == mdRetroHammer) return sphere;
if(pmodel == mdRotatedHyperboles) return true;
if(pmodel == mdSpiral && pconf.spiral_cone < 360) return true;
return false;
}
EX int get_side(const hyperpoint& H) {
#if CAP_VR
if(in_vr_sphere) {
hyperpoint Hscr;
applymodel(shiftless(H), Hscr);
Hscr[3] = 1;
E4;
hyperpoint actual = vrhr::hmd_mv * Hscr;
ld val = 0;
for(int i=0; i<3; i++) val += (vr_sphere_center[i] - actual[i]) * actual[i];
return val > 0 ? -1 : 1;
}
#endif
if(pmodel == mdDisk && sphere) {
double curnorm = H[0]*H[0]+H[1]*H[1]+H[2]*H[2];
double horizon = curnorm / pconf.alpha;
return (H[2] <= -horizon) ? -1 : 1;
}
if(pmodel == mdDisk && hyperbolic && pconf.alpha < 0 && pconf.alpha > -1) {
return (H[2] * (H[2] + pconf.alpha) < sqhypot_d(2, H)) ? -1 : 1;
}
if(pmodel == mdRetroLittrow && sphere) {
return H[2] >= 0 ? 1 : -1;
}
if(pmodel == mdRetroHammer && sphere) {
return H[2] >= 0 ? 1 : -1;
}
if(pmodel == mdRotatedHyperboles)
return H[1] > 0 ? -1 : 1;
if(pmodel == mdHyperboloid) {
return det2(pconf.ball() * cspin90(2, 1) * rgpushxto0(H)) > 0 ? 1 : -1;
}
if(pmodel == mdHyperboloidFlat && sphere)
return H[2] >= 0 ? 1 : -1;
if(pmodel == mdHemisphere && !sphere) {
hyperpoint res;
applymodel(shiftless(H), res);
return res[2] < 0 ? -1 : 1;
}
if(pmodel == mdHemisphere && sphere) {
auto H1 = H;
int s = H1[2] > 0 ? 1 : -1;
if(hemi_side && s != hemi_side) return -spherespecial;
H1[0] /= H1[2]; H1[1] /= H1[2];
H1[2] = -s * sqrt(1 + H1[0]*H1[0] + H1[1] * H1[1]);
dynamicval<geometryinfo1> g(cginf.g, giHyperb2);
return det2(pconf.ball() * cspin90(2, 1) * rgpushxto0(H1)) > 0 ? 1 : -1;
}
if(pmodel == mdSpiral && pconf.spiral_cone < 360) {
return cone_side(shiftless(H));
}
return 0;
}
EX bool correct_side(const hyperpoint& H) {
return get_side(H) == spherespecial;
}
hyperpoint Hlast;
void fixpoint(glvertex& hscr, hyperpoint H) {
hyperpoint bad = H, good = goodpoint;
for(int i=0; i<10; i++) {
hyperpoint mid = midz(bad, good);
if(correct_side(mid))
good = mid;
else
bad = mid;
}
hyperpoint Hscr;
applymodel(shiftless(good), Hscr);
#if CAP_VR
if(vrhr::rendering())
hscr = glhr::makevertex(Hscr[0], Hscr[1]*pconf.stretch, Hscr[2]);
else
#endif
hscr = glhr::makevertex(Hscr[0]*current_display->radius, Hscr[1]*current_display->radius*pconf.stretch, Hscr[2]*current_display->radius);
}
void addpoint(const shiftpoint& H) {
if(true) {
ld z = current_display->radius;
// if(pconf.alpha + H[2] <= BEHIND_LIMIT && pmodel == mdDisk) poly_flags |= POLY_BEHIND;
#if CAP_VR
if(vrhr::rendering()) z = 1;
#endif
if(spherespecial) {
auto H0 = H.h;
if(correct_side(H0)) {
poly_flags |= POLY_INFRONT, last_infront = false;
if(!knowgood || (spherespecial > 0 ? H[2]>goodpoint[2] : H[2]<goodpoint[2])) goodpoint = H0, knowgood = true;
}
else if(sphere && (poly_flags & POLY_ISSIDE)) {
double curnorm = H[0]*H[0]+H[1]*H[1]+H[2]*H[2];
double horizon = curnorm / pconf.alpha;
poly_flags |= POLY_NOTINFRONT;
if(last_infront && nif_error_in(glcoords.back()[0], glcoords.back()[1], H[0], H[1]))
poly_flags |= POLY_NIF_ERROR;
last_infront = true;
z *=
(sqrt(curnorm - horizon*horizon) / (pconf.alpha - horizon)) /
(sqrt(curnorm - H[2]*H[2]) / (pconf.alpha+H[2]));
}
else {
poly_flags |= POLY_NOTINFRONT;
tofix.push_back(make_pair(glcoords.size(), H0));
add1(H0);
return;
}
}
hyperpoint Hscr;
applymodel(H, Hscr);
if(sphere && pmodel == mdSpiral) {
if(isize(glcoords)) {
hyperpoint Hscr1;
shiftpoint H1 = H; H1.shift += TAU;
applymodel(H1, Hscr1);
if(hypot_d(2, Hlast-Hscr1) < hypot_d(2, Hlast-Hscr)) { Hscr = Hscr1; }
H1.shift -= 2 * TAU;
applymodel(H1, Hscr1);
if(hypot_d(2, Hlast-Hscr1) < hypot_d(2, Hlast-Hscr)) { Hscr = Hscr1; }
}
Hlast = Hscr;
}
#if CAP_VR
if(vrhr::rendering()) {
for(int i=0; i<3; i++) Hscr[i] *= z;
}
else
#endif
if(GDIM == 2) {
for(int i=0; i<3; i++) Hscr[i] *= z;
Hscr[1] *= pconf.stretch;
}
else {
Hscr[0] *= z;
Hscr[1] *= z * pconf.stretch;
Hscr[2] = 1 - 2 * (-Hscr[2] - pconf.clip_min) / (pconf.clip_max - pconf.clip_min);
}
add1(Hscr);
}
}
void coords_to_poly() {
polyi = isize(glcoords);
for(int i=0; i<polyi; i++) {
if(!current_display->separate_eyes()) glcoords[i][2] = 0;
polyx[i] = current_display->xcenter + glcoords[i][0] - glcoords[i][2];
polyxr[i] = current_display->xcenter + glcoords[i][0] + glcoords[i][2];
polyy[i] = current_display->ycenter + glcoords[i][1];
}
}
bool behind3(shiftpoint h) {
if(pmodel == mdGeodesic)
return lp_apply(inverse_exp(h))[2] < 0;
if(pmodel == mdLiePerspective)
return lp_apply(lie_log(h))[2] < 0;
#if MAXMDIM >= 4
if(pmodel == mdRelPerspective)
return lp_apply(rel_log(h, false))[2] < 0;
#endif
return h[2] < 0;
}
void addpoly(const shiftmatrix& V, const vector<glvertex> &tab, int ofs, int cnt) {
if(pmodel == mdPixel) {
for(int i=ofs; i<ofs+cnt; i++) {
hyperpoint h = glhr::gltopoint(tab[i]);
#if MAXMDIM >= 4
h[3] = 1;
#endif
h = V.T * h;
add1(h);
}
return;
}
tofix.clear(); knowgood = false;
if(in_perspective()) {
if(get_shader_flags() & SF_SEMIDIRECT) {
dynamicval<bool> d(computing_semidirect, true);
for(int i=ofs; i<ofs+cnt; i++) {
hyperpoint Hscr;
applymodel(V * glhr::gltopoint(tab[i]), Hscr);
add1(Hscr);
}
}
else if(poly_flags & POLY_TRIANGLES) {
for(int i=ofs; i<ofs+cnt; i+=3) {
shiftpoint h0 = V * glhr::gltopoint(tab[i]);
shiftpoint h1 = V * glhr::gltopoint(tab[i+1]);
shiftpoint h2 = V * glhr::gltopoint(tab[i+2]);
if(!behind3(h0) && !behind3(h1) && !behind3(h2))
addpoint(h0), addpoint(h1), addpoint(h2);
}
}
else {
for(int i=ofs; i<ofs+cnt; i++) {
shiftpoint h = V * glhr::gltopoint(tab[i]);
if(!behind3(h)) addpoint(h);
}
}
return;
}
shiftpoint last = V * glhr::gltopoint(tab[ofs]);
bool last_behind = is_behind(last.h);
if(!last_behind) addpoint(last);
hyperpoint enter = C0;
hyperpoint firstleave;
int start_behind = last_behind ? 1 : 0;
for(int i=ofs+1; i<ofs+cnt; i++) {
shiftpoint curr = V*glhr::gltopoint(tab[i]);
if(is_behind(curr.h) != last_behind) {
hyperpoint h = be_just_on_view(last.h, curr.h);
if(start_behind == 1) start_behind = 2, firstleave = h;
if(!last_behind) enter = h;
else if(h[0] * enter[0] + h[1] * enter[1] < 0) poly_flags |= POLY_BEHIND;
addpoint(shiftless(h));
last_behind = !last_behind;
}
if(!last_behind) addpoint(curr);
last = curr;
}
if(start_behind == 2) {
if(firstleave[0] * enter[0] + firstleave[1] * enter[1] < 0) poly_flags |= POLY_BEHIND;
else addpoint(shiftless(firstleave));
}
if(knowgood && isize(tofix)) {
if(true) {
hyperpoint Hx = V.T * C0, Hy = goodpoint;
for(int i=0; i<20; i++) {
hyperpoint mid = midz(Hx, Hy);
if(correct_side(mid)) Hy = mid;
else Hx = mid;
}
goodpoint = midz(Hy, goodpoint);
}
for(auto& p: tofix)
fixpoint(glcoords[p.first], p.second);
/*
hyperpoint Hscr;
applymodel(goodpoint, Hscr);
glcoords.push_back(make_array<GLfloat>(Hscr[0]*current_display->radius+10, Hscr[1]*current_display->radius*pconf.stretch, Hscr[2]*vid.radius));
glcoords.push_back(make_array<GLfloat>(Hscr[0]*current_display->radius, Hscr[1]*current_display->radius*pconf.stretch+10, Hscr[2]*vid.radius));
glcoords.push_back(make_array<GLfloat>(Hscr[0]*current_display->radius-10, Hscr[1]*current_display->radius*pconf.stretch, Hscr[2]*vid.radius));
glcoords.push_back(make_array<GLfloat>(Hscr[0]*current_display->radius, Hscr[1]*current_display->radius*pconf.stretch-10, Hscr[2]*vid.radius));
glcoords.push_back(make_array<GLfloat>(Hscr[0]*current_display->radius+10, Hscr[1]*current_display->radius*pconf.stretch, Hscr[2]*vid.radius)); */
}
}
#if CAP_SDLGFX
void aapolylineColor(SDL_Renderer *s, int*x, int *y, int polyi, color_t col) {
for(int i=1; i<polyi; i++)
aalineColor(s, x[i-1], y[i-1], x[i], y[i], align(col));
}
void polylineColor(SDL_Renderer *s, int *x, int *y, int polyi, color_t col) {
for(int i=1; i<polyi; i++)
lineColor(s, x[i-1], y[i-1], x[i], y[i], align(col));
}
EX void filledPolygonColorI(SDL_Renderer *s, int* px, int *py, int polyi, color_t col) {
std::vector<Sint16> spx(px, px + polyi);
std::vector<Sint16> spy(py, py + polyi);
filledPolygonColor(s, spx.data(), spy.data(), polyi, align(col));
}
#endif
#if CAP_TEXTURE
void drawTexturedTriangle(SDL_Surface *s, int *px, int *py, glvertex *tv, color_t col) {
transmatrix source = matrix3(
px[0], px[1], px[2],
py[0], py[1], py[2],
1, 1, 1);
transmatrix target = matrix3(
tv[0][0], tv[1][0], tv[2][0],
tv[0][1], tv[1][1], tv[2][1],
1, 1, 1
);
transmatrix isource = inverse(source);
int minx = px[0], maxx = px[0];
int miny = py[0], maxy = py[0];
for(int i=1; i<3; i++)
minx = min(minx, px[i]), maxx = max(maxx, px[i]),
miny = min(miny, py[i]), maxy = max(maxy, py[i]);
for(int mx=minx; mx<maxx; mx++)
for(int my=miny; my<maxy; my++) {
hyperpoint h = isource * point3(mx, my, 1);
if(h[0] >= -1e-7 && h[1] >= -1e-7 && h[2] >= -1e-7) {
hyperpoint ht = target * h;
int tw = texture::config.data.twidth;
int x = int(ht[0] * tw) & (tw-1);
int y = int(ht[1] * tw) & (tw-1);
color_t c;
if(texture::config.data.texture_pixels.size() == 0)
c = 0xFFFFFFFF;
else
c = texture::config.data.texture_pixels[y * tw + x];
auto& pix = qpixel(s, mx, my);
for(int p=0; p<3; p++) {
int alpha = part(c, 3) * part(col, 0);
auto& v = part(pix, p);
v = ((255*255 - alpha) * 255 * v + alpha * part(col, p+1) * part(c, p) + 255 * 255 * 255/2 + 1) / (255 * 255 * 255);
}
}
}
}
#endif
EX int global_projection;
#if !CAP_GL
flagtype get_shader_flags() { return 0; }
#endif
#if CAP_GL
int min_slr, max_slr = 0;
#if MAXMDIM >= 4
extern renderbuffer *floor_textures;
#endif
void dqi_poly::gldraw() {
GLWRAP;
auto& v = *tab;
int ioffset = offset;
#if MINIMIZE_GL_CALLS
if(current_display->separate_eyes() == 0 && !tinf && (color == 0 || ((flags & (POLY_VCONVEX | POLY_CCONVEX)) && !(flags & (POLY_INVERSE | POLY_FORCE_INVERTED))))) {
if(lprio != prio || texts_merged || m_shift != V.shift) {
glflush();
lprio = prio;
m_shift = V.shift;
}
shapes_merged++;
if((flags & POLY_CCONVEX) && !(flags & POLY_VCONVEX)) {
vector<glhr::colored_vertex> v2(cnt+1);
for(int i=0; i<cnt+1; i++) v2[i] = glhr::colored_vertex( V.T * glhr::gltopoint( v[offset+i-1] ), color);
if(color) for(int i=0; i<cnt; i++) triangle_vertices.push_back(v2[0]), triangle_vertices.push_back(v2[i]), triangle_vertices.push_back(v2[i+1]);
if(outline) {
for(auto& v: v2) v.set_color(outline);
for(int i=1; i<cnt; i++) line_vertices.push_back(v2[i]), line_vertices.push_back(v2[i+1]);
}
}
else {
vector<glhr::colored_vertex> v2(cnt);
for(int i=0; i<cnt; i++) v2[i] = glhr::colored_vertex( V.T * glhr::gltopoint( v[offset+i] ), color);
if(color) for(int i=2; i<cnt-1; i++) triangle_vertices.push_back(v2[0]), triangle_vertices.push_back(v2[i-1]), triangle_vertices.push_back(v2[i]);
if(outline) {
for(auto& v: v2) v.set_color(outline);
for(int i=1; i<cnt; i++) line_vertices.push_back(v2[i-1]), line_vertices.push_back(v2[i]);
}
}
return;
}
else glflush();
#endif
if(tinf) {
bool col = isize(tinf->colors);
if(col)
glhr::be_color_textured();
else
glhr::be_textured();
if(flags & POLY_SHADE_TEXTURE) current_display->next_shader_flags |= GF_TEXTURE_SHADED;
if(flags & POLY_NO_FOG) current_display->next_shader_flags |= GF_NO_FOG;
glBindTexture(GL_TEXTURE_2D, tinf->texture_id);
if(isize(tinf->colors))
glhr::vertices_texture_color(v, tinf->tvertices, tinf->colors, offset, offset_texture);
else
glhr::vertices_texture(v, tinf->tvertices, offset, offset_texture);
ioffset = 0;
}
else {
glhr::be_nontextured();
if(flags & POLY_NO_FOG) current_display->next_shader_flags |= GF_NO_FOG;
glhr::vertices(v);
}
next_slr:
for(int ed = current_display->separate_eyes() ? -1 : 0; ed<2; ed+=2) {
if(global_projection && global_projection != ed) continue;
if(min_slr < max_slr) {
current_display->set_all(ed, sl2 ? 0 : V.shift);
glhr::set_index_sl(V.shift + M_PI * min_slr * hybrid::csteps / cgi.psl_steps);
}
else if(sl2) {
current_display->set_all(ed, 0);
glhr::set_index_sl(V.shift);
}
else {
current_display->set_all(ed, sl2 ? 0 : V.shift);
glhr::set_index_sl(V.shift + M_PI * min_slr * hybrid::csteps / cgi.psl_steps);
}
bool draw = color;
flagtype sp = get_shader_flags();
if(sp & SF_DIRECT) {
if((sp & SF_BAND) && V[2][2] > 1e8) continue;
glapplymatrix(V.T);
}
if(draw) {
if(flags & POLY_TRIANGLES) {
glhr::color2(color, (flags & POLY_INTENSE) ? 2 : 1);
glhr::set_depthtest(model_needs_depth() && prio < PPR::SUPERLINE);
glhr::set_depthwrite(model_needs_depth() && prio != PPR::TRANSPARENT_SHADOW && prio != PPR::EUCLIDEAN_SKY);
glhr::set_fogbase(prio == PPR::SKY ? 1.0 + ((abs(cgi.SKY - cgi.LOWSKY)) / sightranges[geometry]) : 1.0);
glDrawArrays(GL_TRIANGLES, ioffset, cnt);
}
else {
glEnable(GL_STENCIL_TEST);
glColorMask( GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE );
glhr::set_depthtest(false);
glStencilOp( GL_INVERT, GL_INVERT, GL_INVERT);
glStencilFunc( GL_ALWAYS, 0x1, 0x1 );
glhr::color2(0xFFFFFFFF);
glDrawArrays(tinf ? GL_TRIANGLES : GL_TRIANGLE_FAN, ioffset, cnt);
current_display->set_mask(ed);
glhr::color2(color);
glhr::set_depthtest(model_needs_depth() && prio < PPR::SUPERLINE);
glhr::set_depthwrite(model_needs_depth() && prio != PPR::TRANSPARENT_SHADOW && prio != PPR::EUCLIDEAN_SKY);
glhr::set_fogbase(prio == PPR::SKY ? 1.0 + (euclid ? 20 : 5 / sightranges[geometry]) : 1.0);
if(flags & (POLY_INVERSE | POLY_FORCE_INVERTED)) {
glStencilOp( GL_ZERO, GL_ZERO, GL_ZERO);
glStencilFunc( GL_NOTEQUAL, 1, 1);
GLfloat xx = vid.xres;
GLfloat yy = vid.yres;
vector<glvertex> scr = {
glhr::makevertex(-xx, -yy, 0),
glhr::makevertex(+xx, -yy, 0),
glhr::makevertex(+xx, +yy, 0),
glhr::makevertex(-xx, +yy, 0)
};
glhr::vertices(scr);
glhr::id_modelview();
glDrawArrays(tinf ? GL_TRIANGLES : GL_TRIANGLE_FAN, 0, 4);
glhr::vertices(v);
if(sp & SF_DIRECT) glapplymatrix(V.T);
}
else {
glStencilOp( GL_ZERO, GL_ZERO, GL_ZERO);
glStencilFunc( GL_EQUAL, 1, 1);
glDrawArrays(tinf ? GL_TRIANGLES : GL_TRIANGLE_FAN, ioffset, cnt);
}
glDisable(GL_STENCIL_TEST);
}
}
if(outline && !tinf) {
if(flags & POLY_APEIROGONAL) cnt = apeiro_cnt;
glhr::color2(outline);
glhr::set_depthtest(model_needs_depth() && prio < PPR::SUPERLINE);
glhr::set_depthwrite(model_needs_depth() && prio != PPR::TRANSPARENT_SHADOW && prio != PPR::EUCLIDEAN_SKY);
glhr::set_fogbase(prio == PPR::SKY ? 1.0 + (euclid ? 20 : 5 / sightranges[geometry]) : 1.0);
if(flags & POLY_TRIANGLES) {
vector<glvertex> v1;
v1.reserve(cnt * 2);
for(int i=0; i<cnt; i+= 3) {
v1.push_back(v[offset+i]);
v1.push_back(v[offset+i+1]);
v1.push_back(v[offset+i+1]);
v1.push_back(v[offset+i+2]);
v1.push_back(v[offset+i+2]);
v1.push_back(v[offset+i]);
}
glhr::vertices(v1);
glDrawArrays(GL_LINES, 0, cnt*2);
// glDrawArrays(GL_LINE_STRIP, ioffset, cnt);
}
else
glDrawArrays(GL_LINE_STRIP, offset, cnt);
}
}
if(min_slr+1 < max_slr) {
min_slr++;
goto next_slr;
}
}
#endif
EX ld scale_at(const shiftmatrix& T) {
if(GDIM == 3 && pmodel == mdPerspective) {
ld z = (tC0(unshift(T)))[2];
if(z == 0) return 1;
z = 1 / abs(z);
if(z > 10) return 10;
return z;
}
if(sol) return 1;
hyperpoint h1, h2, h3;
applymodel(tC0(T), h1);
applymodel(T * xpush0(.01), h2);
applymodel(T * ypush(.01) * C0, h3);
if(mdBandAny()) {
ld x2 = 2;
if(pmodel == mdBandEquiarea) x2 /= 2;
ld x4 = 2 * x2;
if(h2[0] > h1[0] + x2) h2[0] -= x4;
if(h2[0] < h1[0] - x2) h2[0] += x4;
if(h3[0] > h1[0] + x2) h3[0] -= x4;
if(h3[0] < h1[0] - x2) h3[0] += x4;
}
return sqrt(hypot_d(2, h2-h1) * hypot_d(2, h3-h1) / .0001);
}
EX int perfect_linewidth = 1;
EX ld linewidthat(const shiftpoint& h) {
if(!vid.fineline) return 1;
else if(hyperbolic && pmodel == mdDisk && pconf.alpha == 1 && !ISWEB && !flat_on) {
double dz = h[LDIM];
if(dz < 1) return 1;
else {
double dx = sqrt(dz * dz - 1);
double dfc = dx/(dz+1);
dfc = 1 - dfc*dfc;
return dfc;
}
}
else if(hyperbolic && pmodel == mdRelPerspective) {
if(abs(h[3]) < 1e-6) return 1;
return 1 / (1 + abs(h[3]));
}
else if(sl2 && pmodel == mdRelPerspective) {
if(abs(h[2]) < 1e-6) return 1;
return 1 / (1 + abs(h[2]));
}
else if(hyperbolic && GDIM == 3 && pmodel == mdPerspective && pconf.alpha == 0 && h[3] < 0.99) {
return 1;
}
else if(perfect_linewidth >= (inHighQual ? 1 : 2)) {
hyperpoint h0 = h.h / zlevel(h.h);
shiftmatrix T = shiftless(rgpushxto0(h0), h.shift);
return scale_at(T);
}
return 1;
}
EX void set_width(ld w) {
#if MINIMIZE_GL_CALLS
if(w != glhr::current_linewidth) glflush();
#endif
#if CAP_GL
glhr::set_linewidth(w);
#endif
}
// this part makes cylindrical projections on the sphere work
namespace cyl {
int loop_min = 0, loop_max = 0;
vector<ld> periods;
ld period_at(ld y) {
ld m = current_display->radius;
y /= (m * pconf.stretch);
switch(pmodel) {
case mdBand:
case mdMiller:
return m * 4;
case mdSinusoidal:
return m * 2 * cos(y * M_PI);
case mdMollweide:
return m * 2 * sqrt(1 - y*y*4);
case mdCollignon: {
if(pconf.collignon_reflected && y > 0) y = -y;
y += signed_sqrt(pconf.collignon_parameter);
return abs(m*y*2/1.2);
}
default:
return m * 2;
}
}
void ori_to_scr(glvertex& g) {
auto& Ori = pconf.mori().v2;
tie(g[0], g[1]) = make_pair(
Ori[0][0] * g[0] + Ori[0][1] * g[1],
Ori[1][0] * g[0] + Ori[1][1] * g[1]
);
}
void scr_to_ori(glvertex& g) {
auto& Ori = pconf.mori().v2;
/* we invert it, so transposition is applied in the formula */
tie(g[0], g[1]) = make_pair(
Ori[0][0] * g[0] + Ori[1][0] * g[1],
Ori[0][1] * g[0] + Ori[1][1] * g[1]
);
}
void adjust(bool tinf) {
periods.resize(isize(glcoords));
if(!models::model_straight)
for(auto& g: glcoords)
scr_to_ori(g);
for(int i = 0; i<isize(glcoords); i++) periods[i] = period_at(glcoords[i][1]);
auto dist = [] (ld a, ld b) { return max(b, a-b); };
ld chypot = hypot(dist(vid.xres, current_display->xcenter), dist(vid.yres, current_display->ycenter));
ld cmin = -chypot/2, cmax = chypot/2, dmin = -chypot, dmax = chypot;
ld z = pconf.stretch * current_display->radius;
switch(pmodel) {
case mdSinusoidal: case mdBandEquidistant: case mdMollweide:
dmax = z/2, dmin = -dmax;
break;
case mdBandEquiarea:
dmax = z/M_PI, dmin = -dmax;
break;
case mdCollignon:
dmin = z * (signed_sqrt(pconf.collignon_parameter - 1) - signed_sqrt(pconf.collignon_parameter));
if(pconf.collignon_reflected) dmax = -dmin;
else dmax = z * (signed_sqrt(pconf.collignon_parameter + 1) - signed_sqrt(pconf.collignon_parameter));
break;
default: ;
}
bool had = false;
ld first, next;
for(int i = 0; i<isize(glcoords); i++) if(periods[i] > 1) {
if(!had) {
next = first = glcoords[i][0] / periods[i];
had = true;
}
else {
glcoords[i][0] /= periods[i];
glcoords[i][0] -= round_nearest(glcoords[i][0]-next);
next = glcoords[i][0];
glcoords[i][0] *= periods[i];
}
loop_min = min<int>(loop_min, floor((cmin - glcoords[i][0]) / periods[i]));
loop_max = max<int>(loop_max, ceil((cmax - glcoords[i][0]) / periods[i]));
}
if(!had) return;
ld last = first - round_nearest(first-next);