SDK Multiplataforma en C logo

SDK Multiplataforma en C

¡Hola Colisiones 2D!

❮ Anterior
Siguiente ❯

Col2dHello es un pequeño entorno para la experimentación con algoritmos de detección de colisiones en 2D. Permite crear diferentes tipos de volúmenes, moverlos con el ratón y editarlos mediante el panel lateral. El detalle de las funciones lo puedes encontrar en Colisiones 2D.

Captura de una aplicación de detección de colisiones 2D. Versión Windows.
Figura 1: Versión Windows.
Captura de una aplicación de detección de colisiones 2D.  Versión macOS.
Figura 2: Versión macOS.
Captura de una aplicación de detección de colisiones 2D. Versión Linux.
Figura 3: Versión Linux.
Listado 1: howto/col2dhello/col2dhello.c
  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
/* 2D collision detection demo */

#include "nappgui.h"
#include "col2dgui.h"

/*---------------------------------------------------------------------------*/

static void i_OnClose(App *app, Event *e)
{
    osapp_finish();
    unref(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static Tri2Df i_triangle(void)
{
    Tri2Df tri = tri2df(-3, 4, -1, -2, 7, -2);
    cassert(tri2d_ccwf(&tri) == TRUE);
    return tri;
}

/*---------------------------------------------------------------------------*/

static Pol2Df *i_convex_pol(void)
{
    V2Df pt[] = { {4,1}, {2,5}, {-3,5}, {-4,2}, {0,-3} };
    Pol2Df *pol = NULL;
    bmem_rev_elems(pt, sizeof(pt) / sizeof(V2Df), V2Df);
    pol = pol2d_createf(pt, sizeof(pt) / sizeof(V2Df));
    cassert(pol2d_convexf(pol) == TRUE);
    cassert(pol2d_ccwf(pol) == FALSE);
    return pol;
}

/*---------------------------------------------------------------------------*/

static Pol2Df *i_simple_pol(void)
{
    V2Df pt[] = { {9.78f, 12.17f}, {-10.00f, 11.01f}, {-9.68f, 3.20f}, {-9.30f, -5.98f}, {-4.27f, -5.84f}, {-4.03f, -12.17f}, {2.72f, -12.12f}, {2.47f, -6.36f}, {2.04f, 3.26f}, {-1.45f, 3.05f}, {-1.08f, -2.08f}, {-3.98f, -2.38f}, {-4.23f, 2.88f}, {-1.45f, 3.05f}, {2.04f, 3.26f}, {10.00f, 3.75f} };
    Pol2Df *pol = NULL;
    bmem_rev_elems(pt, sizeof(pt) / sizeof(V2Df), V2Df);
    pol = pol2d_createf(pt, sizeof(pt) / sizeof(V2Df));
    cassert(pol2d_convexf(pol) == FALSE);
    cassert(pol2d_ccwf(pol) == FALSE);
    return pol;
}

/*---------------------------------------------------------------------------*/

static Shape *i_new_shape(ArrSt(Shape) *shapes, const shtype_t type)
{
    Shape *shape = arrst_new(shapes, Shape);
    shape->type = type;
    shape->mouse = FALSE;
    shape->collisions = 0;
    return shape;
}

/*---------------------------------------------------------------------------*/

static void i_new_pnt(ArrSt(Shape) *shapes, const real32_t x, const real32_t y)
{
    Shape *shape = i_new_shape(shapes, ekPOINT);
    shape->body.pnt.x = x;
    shape->body.pnt.y = y;
}

/*---------------------------------------------------------------------------*/

static void i_new_cloud(ArrSt(Shape) *shapes, const real32_t x, const real32_t y, const real32_t w, const real32_t h, const real32_t a)
{
    Shape *shape = i_new_shape(shapes, ekPOINT_CLOUD);
    shape->body.cloud.pnts = arrst_create(V2Df);
    shape->body.cloud.center.x = x;
    shape->body.cloud.center.y = y;
    shape->body.cloud.width = w;
    shape->body.cloud.height = h;
    shape->body.cloud.angle = a;
    shape->body.cloud.ctype = 0;
    shape->body.cloud.type = 0;
    (void)arrst_new_n(shape->body.cloud.pnts, POINT_CLOUD_N, V2Df);
    col2dhello_update_cloud(&shape->body.cloud);
}

/*---------------------------------------------------------------------------*/

static void i_new_seg(ArrSt(Shape) *shapes, const real32_t x, const real32_t y, const real32_t l, const real32_t a)
{
    Shape *shape = i_new_shape(shapes, ekSEGMENT);
    shape->body.seg.center.x = x;
    shape->body.seg.center.y = y;
    shape->body.seg.length = l;
    shape->body.seg.angle = a;
    col2dhello_update_seg(&shape->body.seg);
}

/*---------------------------------------------------------------------------*/

static void i_new_cir(ArrSt(Shape) *shapes, const real32_t x, const real32_t y, const real32_t r)
{
    Shape *shape = i_new_shape(shapes, ekCIRCLE);
    shape->body.cir.r = r;
    shape->body.cir.c.x = x;
    shape->body.cir.c.y = y;
}

/*---------------------------------------------------------------------------*/

static void i_new_box(ArrSt(Shape) *shapes, const real32_t x, const real32_t y, const real32_t w, const real32_t h)
{
    Shape *shape = i_new_shape(shapes, ekBOX);
    shape->body.box.center.x = x;
    shape->body.box.center.y = y;
    shape->body.box.width = w;
    shape->body.box.height = h;
    col2dhello_update_box(&shape->body.box);
}

/*---------------------------------------------------------------------------*/

static void i_new_obb(ArrSt(Shape) *shapes, const real32_t x, const real32_t y, const real32_t w, const real32_t h, const real32_t a)
{
    Shape *shape = i_new_shape(shapes, ekOBB);
    shape->body.obb.center.x = x;
    shape->body.obb.center.y = y;
    shape->body.obb.angle = a;
    shape->body.obb.width = w;
    shape->body.obb.height = h;
    shape->body.obb.obb = NULL;
    col2dhello_update_obb(&shape->body.obb);
}

/*---------------------------------------------------------------------------*/

static void i_new_tri(ArrSt(Shape) *shapes, const real32_t x, const real32_t y, const real32_t a, const real32_t s)
{
    Shape *shape = i_new_shape(shapes, ekTRIANGLE);
    shape->body.tri.center.x = x;
    shape->body.tri.center.y = y;
    shape->body.tri.angle = a;
    shape->body.tri.scale = s;
    shape->body.tri.t2d = *kT2D_IDENTf;
    shape->body.tri.tri = i_triangle();
    col2dhello_update_tri(&shape->body.tri);
}

/*---------------------------------------------------------------------------*/

static void i_new_pol(ArrSt(Shape) *shapes, const shtype_t type, const real32_t x, const real32_t y, const real32_t a, const real32_t s)
{
    Shape *shape = i_new_shape(shapes, type);
    shape->body.pol.center.x = x;
    shape->body.pol.center.y = y;
    shape->body.pol.angle = a;
    shape->body.pol.scale = s;
    shape->body.pol.t2d = *kT2D_IDENTf;
    shape->body.pol.pol = type == ekCONVEX_POLY ? i_convex_pol() : i_simple_pol();
    col2dhello_update_pol(&shape->body.pol);
}

/*---------------------------------------------------------------------------*/

static ArrSt(Shape) *i_shapes(void) 
{
    ArrSt(Shape) *shapes = arrst_create(Shape);
    i_new_pnt(shapes, 520, 230);
    i_new_pnt(shapes, 220, 205);
    i_new_seg(shapes, 420, 280, 190, 125 * kBMATH_DEG2RADf);
    i_new_cir(shapes, 100, 100, 50);
    i_new_cir(shapes, 300, 200, 20);
    i_new_box(shapes, 100, 225, 100, 50);
    i_new_obb(shapes, 150, 350, 200, 20, 200 * kBMATH_DEG2RADf);
    i_new_obb(shapes, 460, 90, 200, 60, 15 * kBMATH_DEG2RADf);
    i_new_tri(shapes, 550, 475, 75 * kBMATH_DEG2RADf, 15);
    i_new_tri(shapes, 90, 480, 355 * kBMATH_DEG2RADf, 18);
    i_new_pol(shapes, ekCONVEX_POLY, 535, 325, 30 * kBMATH_DEG2RADf, 15);
    i_new_pol(shapes, ekSIMPLE_POLY, 370, 450, 45 * kBMATH_DEG2RADf, 7);
    return shapes;
}

/*---------------------------------------------------------------------------*/

static App *i_create(void)
{
    App *app = heap_new0(App);
    col2dhello_dbind();
    app->shapes = i_shapes();
    app->dists = arrst_create(Dist);
    app->seltype = ekOBB;
    app->selshape = UINT32_MAX;
    app->show_seg_pt = TRUE;
    app->show_triangles = FALSE;
    app->show_convex_parts = FALSE;
    app->sel_area = 0;
    app->window = col2dhello_window(app);
    window_title(app->window, "2D Collision Detection");
    window_origin(app->window, v2df(500, 200));
    window_OnClose(app->window, listener(app, i_OnClose, App));
    window_show(app->window);
    col2dhello_dbind_shape(app);
    col2dhello_collisions(app);
    return app;
}

/*---------------------------------------------------------------------------*/

static void i_remove_bounds(Cloud *cloud)
{
    cassert_no_null(cloud);
    switch(cloud->ctype) {
    case 0:
    case 1:
    case 2:
        break;
    case 3:
        obb2d_destroyf(&cloud->bound.obb);
        break;
    case 4:
        pol2d_destroyf(&cloud->bound.poly);
        break;
    cassert_default();
    }
}

/*---------------------------------------------------------------------------*/

static void i_remove_shape(Shape *shape)
{
    cassert_no_null(shape);
    switch(shape->type){
    case ekPOINT_CLOUD:
        arrst_destroy(&shape->body.cloud.pnts, NULL, V2Df);
        i_remove_bounds(&shape->body.cloud);
        break;
        
    case ekOBB:
        obb2d_destroyf(&shape->body.obb.obb);
        break;

    case ekCONVEX_POLY:
    case ekSIMPLE_POLY:
        pol2d_destroyf(&shape->body.pol.pol);
        break;

    case ekPOINT:
    case ekSEGMENT:
    case ekCIRCLE:
    case ekBOX:
    case ekTRIANGLE:
        break;

    cassert_default();
    }
}

/*---------------------------------------------------------------------------*/

static void i_destroy(App **app)
{
    arrst_destroy(&(*app)->shapes, i_remove_shape, Shape);
    arrst_destroy(&(*app)->dists, NULL, Dist);
    window_destroy(&(*app)->window);
    heap_delete(app, App);
}

/*---------------------------------------------------------------------------*/

void col2dhello_new_shape(App *app, const V2Df pos)
{
    switch(app->seltype) {
    case ekPOINT:
        i_new_pnt(app->shapes, pos.x, pos.y);
        break;

    case ekPOINT_CLOUD:
        i_new_cloud(app->shapes, pos.x, pos.y, 100, 50, 15 * kBMATH_DEG2RADf);
        break;

    case ekSEGMENT:
        i_new_seg(app->shapes, pos.x, pos.y, 100, 15 * kBMATH_DEG2RADf);
        break;

    case ekCIRCLE:
        i_new_cir(app->shapes, pos.x, pos.y, 30);
        break;

    case ekBOX:
        i_new_box(app->shapes, pos.x, pos.y, 100, 50);
        break;

    case ekOBB:
        i_new_obb(app->shapes, pos.x, pos.y, 100, 50, 15 * kBMATH_DEG2RADf);
        break;

    case ekTRIANGLE:
        i_new_tri(app->shapes, pos.x, pos.y, 15 * kBMATH_DEG2RADf, 15);
        break;

    case ekCONVEX_POLY:
        i_new_pol(app->shapes, ekCONVEX_POLY, pos.x, pos.y, 0, 10);
        break;

    case ekSIMPLE_POLY:
        i_new_pol(app->shapes, ekSIMPLE_POLY, pos.x, pos.y, 0, 10);
        break;

    cassert_default();
    }

    app->selshape = arrst_size(app->shapes, Shape) - 1;
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_gui(App *app)
{
    cassert_no_null(app);
    if (app->selshape != UINT32_MAX)
    {
        Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
        switch(shape->type) {
        case ekPOINT:
        case ekPOINT_CLOUD:
        case ekSEGMENT:
            app->sel_area = 0;
            break;

        case ekCIRCLE:
            app->sel_area = cir2d_areaf(&shape->body.cir);
            break;

        case ekBOX:
            app->sel_area = box2d_areaf(&shape->body.box.box);
            break;

        case ekOBB:
            app->sel_area = obb2d_areaf(shape->body.obb.obb);
            break;

        case ekTRIANGLE:
            app->sel_area = tri2d_areaf(&shape->body.tri.tri);
            break;

        case ekCONVEX_POLY:
        case ekSIMPLE_POLY:
            app->sel_area = pol2d_areaf(shape->body.pol.pol);
            break;

        cassert_default();
        }
    }
    else
    {
        app->sel_area = 0;
    }

    layout_dbind_obj(app->main_layout, app, App);
    panel_update(app->obj_panel);
    view_update(app->view);
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_seg(Seg *seg)
{
    V2Df hvec;
    cassert_no_null(seg);
    hvec.x = seg->length / 2;
    hvec.y = 0;
    v2d_rotatef(&hvec, seg->angle);
    seg->seg.p0.x = seg->center.x - hvec.x;
    seg->seg.p0.y = seg->center.y - hvec.y;
    seg->seg.p1.x = seg->center.x + hvec.x;
    seg->seg.p1.y = seg->center.y + hvec.y;
}

/*---------------------------------------------------------------------------*/

Box2Df col2dhello_cloud_box(const Cloud *cloud)
{
    Box2Df box = cloud->box;
    box.min = v2d_addf(&cloud->box.min, &cloud->center);
    box.max = v2d_addf(&cloud->box.max, &cloud->center);
    return box;
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_cloud(Cloud *cloud)
{
    V2Df *pt = NULL;
    uint32_t i, n;
    real32_t hw, hh;
    cassert_no_null(cloud);
    pt = arrst_all(cloud->pnts, V2Df);
    n = arrst_size(cloud->pnts, V2Df);
    hw = cloud->width / 2;
    hh = cloud->height / 2;

    for (i = 0; i < n; ++i)
    {
        real32_t ox = bmath_randf(- .3f * hw, .3f * hw);
        real32_t oy = bmath_randf(- .3f * hh, .3f * hh);
        pt[i].x = bmath_randf(-hw, hw) + ox;
        pt[i].y = bmath_randf(-hh, hh) + oy;
    }
    
    if (cloud->angle != 0)
    {
        T2Df t2d;
        t2d_rotatef(&t2d, kT2D_IDENTf, cloud->angle);
        t2d_vmultnf(pt, &t2d, pt, n);
    }

    cloud->box = box2d_from_pointsf(pt, n);
    col2dhello_update_cloud_bounds(cloud);
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_cloud_bounds(Cloud *cloud)
{
    const V2Df *p = arrst_all(cloud->pnts, V2Df);
    uint32_t n = arrst_size(cloud->pnts, V2Df);

    i_remove_bounds(cloud);
    switch(cloud->type) {
    case 0:
        cloud->bound.cir = cir2d_from_boxf(&cloud->box);
        break;

    case 1:
        cloud->bound.cir = cir2d_from_pointsf(p, n);
        break;

    case 2:
        cloud->bound.cir = cir2d_minimumf(p, n);
        break;

    case 3:
        cloud->bound.obb = obb2d_from_pointsf(p, n);
        break;

    case 4:
        cloud->bound.poly = pol2d_convex_hullf(p, n);
        break;
    cassert_default();
    }

    cloud->ctype = cloud->type;
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_box(Box *box)
{
    cassert_no_null(box);
    box->box.min.x = box->center.x - box->width / 2;
    box->box.min.y = box->center.y - box->height / 2;
    box->box.max.x = box->center.x + box->width / 2;
    box->box.max.y = box->center.y + box->height / 2;
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_obb(OBB *obb)
{
    cassert_no_null(obb);
    if (obb->obb == NULL)
        obb->obb = obb2d_createf(&obb->center, obb->width, obb->height, obb->angle);
    else
        obb2d_updatef(obb->obb, &obb->center, obb->width, obb->height, obb->angle);
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_tri(Tri *tri)
{
    T2Df t2d, nt2d;
    cassert_no_null(tri);
    t2d_inversef(&t2d, &tri->t2d);
    t2d_movef(&nt2d, kT2D_IDENTf, tri->center.x, tri->center.y);
    t2d_rotatef(&nt2d, &nt2d, tri->angle);
    t2d_scalef(&nt2d, &nt2d, tri->scale, tri->scale);
    t2d_multf(&t2d, &nt2d, &t2d);
    tri2d_transformf(&tri->tri, &t2d);
    tri->t2d = nt2d;
}

/*---------------------------------------------------------------------------*/

void col2dhello_update_pol(Pol *pol)
{
    T2Df t2d, nt2d;
    cassert_no_null(pol);
    cassert_no_null(pol->pol);
    t2d_inversef(&t2d, &pol->t2d);
    t2d_movef(&nt2d, kT2D_IDENTf, pol->center.x, pol->center.y);
    t2d_rotatef(&nt2d, &nt2d, pol->angle);
    t2d_scalef(&nt2d, &nt2d, pol->scale, pol->scale);
    t2d_multf(&t2d, &nt2d, &t2d);
    pol2d_transformf(pol->pol, &t2d);
    pol->t2d = nt2d;
}

/*---------------------------------------------------------------------------*/

static bool_t i_mouse_inside(const Shape *shape, const real32_t mouse_x, const real32_t mouse_y)
{
    V2Df m = v2df(mouse_x, mouse_y);

    switch(shape->type) {
    case ekPOINT:
        return col2d_point_pointf(&shape->body.pnt, &m, CENTER_RADIUS, NULL);

    case ekPOINT_CLOUD:
    {
        Box2Df box = col2dhello_cloud_box(&shape->body.cloud);
        return col2d_box_pointf(&box, &m, NULL);
    }

    case ekSEGMENT:
        return col2d_segment_pointf(&shape->body.seg.seg, &m, CENTER_RADIUS, NULL);

    case ekCIRCLE:
        return col2d_circle_pointf(&shape->body.cir, &m, NULL);

    case ekBOX:
        return col2d_box_pointf(&shape->body.box.box, &m, NULL);

    case ekOBB:
        return col2d_obb_pointf(shape->body.obb.obb, &m, NULL);

    case ekTRIANGLE:
        return col2d_tri_pointf(&shape->body.tri.tri, &m, NULL);

    case ekCONVEX_POLY:
    case ekSIMPLE_POLY:
        return col2d_poly_pointf(shape->body.pol.pol, &m, NULL);

    cassert_default();
    }

    return FALSE;
}

/*---------------------------------------------------------------------------*/

void col2dhello_mouse_collisions(App *app, const real32_t mouse_x, const real32_t mouse_y)
{
    arrst_foreach(shape, app->shapes, Shape)
        shape->mouse = i_mouse_inside(shape, mouse_x, mouse_y);
    arrst_end();
}

/*---------------------------------------------------------------------------*/

static void i_point_segment_dist(const Seg2Df *seg, const V2Df *pnt, ArrSt(Dist) *dists)
{
    Dist *dist = arrst_new(dists, Dist);
    real32_t t = seg2d_close_paramf(seg, pnt);
    dist->p0 = *pnt;
    dist->p1 = seg2d_evalf(seg, t);
}

/*---------------------------------------------------------------------------*/

void col2dhello_collisions(App *app)
{
    Shape *shape = arrst_all(app->shapes, Shape);
    uint32_t n = arrst_size(app->shapes, Shape);
    uint32_t i, j;

    arrst_clear(app->dists, NULL, Dist);

    for (i = 0; i < n; ++i)
        shape[i].collisions = 0;

    for (i = 0; i < n; ++i)
    for (j = i + 1; j < n; ++j)
    {
        const Shape *shape1 = shape[i].type < shape[j].type ? &shape[i] : &shape[j];
        const Shape *shape2 = shape[i].type < shape[j].type ? &shape[j] : &shape[i];
        bool_t col = FALSE;

        switch(shape1->type) {
        case ekPOINT:
            switch(shape2->type) {
            case ekPOINT:
                col = col2d_point_pointf(&shape1->body.pnt, &shape2->body.pnt, CENTER_RADIUS, NULL);
                break;

            case ekPOINT_CLOUD:
                col = FALSE;
                break;

            case ekSEGMENT:
                col = col2d_segment_pointf(&shape2->body.seg.seg, &shape1->body.pnt, CENTER_RADIUS, NULL);
                i_point_segment_dist(&shape2->body.seg.seg, &shape1->body.pnt, app->dists);
                break;

            case ekCIRCLE:
                col = col2d_circle_pointf(&shape2->body.cir, &shape1->body.pnt, NULL);
                break;

            case ekBOX:
                col = col2d_box_pointf(&shape2->body.box.box, &shape1->body.pnt, NULL);
                break;

            case ekOBB:
                col = col2d_obb_pointf(shape2->body.obb.obb, &shape1->body.pnt, NULL);
                break;

            case ekTRIANGLE:
                col = col2d_tri_pointf(&shape2->body.tri.tri, &shape1->body.pnt, NULL);
                break;

            case ekCONVEX_POLY:
            case ekSIMPLE_POLY:
                col = col2d_poly_pointf(shape2->body.pol.pol, &shape1->body.pnt, NULL);
                break;

            cassert_default();
            }
            break;

        case ekPOINT_CLOUD:
            col = FALSE;
            break;

        case ekSEGMENT:
            switch(shape2->type) {
            case ekSEGMENT:
                col = col2d_segment_segmentf(&shape1->body.seg.seg, &shape2->body.seg.seg, NULL);
                break;

            case ekCIRCLE:
                col = col2d_circle_segmentf(&shape2->body.cir, &shape1->body.seg.seg, NULL);
                break;

            case ekBOX:
                col = col2d_box_segmentf(&shape2->body.box.box, &shape1->body.seg.seg, NULL);
                break;

            case ekOBB:
                col = col2d_obb_segmentf(shape2->body.obb.obb, &shape1->body.seg.seg, NULL);
                break;

            case ekTRIANGLE:
                col = col2d_tri_segmentf(&shape2->body.tri.tri, &shape1->body.seg.seg, NULL);
                break;

            case ekCONVEX_POLY:
            case ekSIMPLE_POLY:
                col = col2d_poly_segmentf(shape2->body.pol.pol, &shape1->body.seg.seg, NULL);
                break;

            case ekPOINT:
            case ekPOINT_CLOUD:
            cassert_default();
            }
            break;

        case ekCIRCLE:
            switch(shape2->type) {
            case ekCIRCLE:
                col = col2d_circle_circlef(&shape1->body.cir, &shape2->body.cir, NULL);
                break;

            case ekBOX:
                col = col2d_box_circlef(&shape2->body.box.box, &shape1->body.cir, NULL);
                break;

            case ekOBB:
                col = col2d_obb_circlef(shape2->body.obb.obb, &shape1->body.cir, NULL);
                break;

            case ekTRIANGLE:
                col = col2d_tri_circlef(&shape2->body.tri.tri, &shape1->body.cir, NULL);
                break;

            case ekCONVEX_POLY:
            case ekSIMPLE_POLY:
                col = col2d_poly_circlef(shape2->body.pol.pol, &shape1->body.cir, NULL);
                break;

            case ekPOINT:
            case ekPOINT_CLOUD:
            case ekSEGMENT:
            cassert_default();
            }
            break;

        case ekBOX:
            switch(shape2->type) {
            case ekBOX:
                col = col2d_box_boxf(&shape1->body.box.box, &shape2->body.box.box, NULL);
                break;

            case ekOBB:
                col = col2d_obb_boxf(shape2->body.obb.obb, &shape1->body.box.box, NULL);
                break;

            case ekTRIANGLE:
                col = col2d_tri_boxf(&shape2->body.tri.tri, &shape1->body.box.box, NULL);
                break;

            case ekCONVEX_POLY:
            case ekSIMPLE_POLY:
                col = col2d_poly_boxf(shape2->body.pol.pol, &shape1->body.box.box, NULL);
                break;

            case ekPOINT:
            case ekPOINT_CLOUD:
            case ekSEGMENT:
            case ekCIRCLE:
            cassert_default();
            }
            break;

        case ekOBB:
            switch(shape2->type) {
            case ekOBB:
                col = col2d_obb_obbf(shape1->body.obb.obb, shape2->body.obb.obb, NULL);
                break;

            case ekTRIANGLE:
                col = col2d_tri_obbf(&shape2->body.tri.tri, shape1->body.obb.obb, NULL);
                break;

            case ekCONVEX_POLY:
            case ekSIMPLE_POLY:
                col = col2d_poly_obbf(shape2->body.pol.pol, shape1->body.obb.obb, NULL);
                break;

            case ekPOINT:
            case ekPOINT_CLOUD:
            case ekSEGMENT:
            case ekCIRCLE:
            case ekBOX:
            cassert_default();
            }
            break;

        case ekTRIANGLE:
            switch(shape2->type) {
            case ekTRIANGLE:
                col = col2d_tri_trif(&shape1->body.tri.tri, &shape2->body.tri.tri, NULL);
                break;

            case ekCONVEX_POLY:
            case ekSIMPLE_POLY:
                col = col2d_poly_trif(shape2->body.pol.pol, &shape1->body.tri.tri, NULL);
                break;

            case ekPOINT:
            case ekPOINT_CLOUD:
            case ekSEGMENT:
            case ekCIRCLE:
            case ekBOX:
            case ekOBB:
            cassert_default();
            }
            break;

        case ekCONVEX_POLY:
        case ekSIMPLE_POLY:
            switch(shape2->type) {
            case ekCONVEX_POLY:
            case ekSIMPLE_POLY:
                col = col2d_poly_polyf(shape1->body.pol.pol, shape2->body.pol.pol, NULL);
                break;

            case ekPOINT:
            case ekPOINT_CLOUD:
            case ekSEGMENT:
            case ekCIRCLE:
            case ekBOX:
            case ekOBB:
            case ekTRIANGLE:
            cassert_default();
            }
            break;

        cassert_default();
        }

        if (col == TRUE)
        {
            shape[i].collisions += 1;
            shape[j].collisions += 1;
        }
    }
}

/*---------------------------------------------------------------------------*/

#include "osmain.h"
osmain(i_create, i_destroy, "", App)
Listado 2: howto/col2dhello/col2dhello.hxx
  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
/* 2D collision detection demo */

#ifndef __COL2DHELLO_HXX__
#define __COL2DHELLO_HXX__

#include "gui.hxx"

#define CENTER_RADIUS       3
#define POINT_CLOUD_N       100

typedef struct _cloud_t Cloud;
typedef struct _seg_t Seg;
typedef struct _box_t Box;
typedef struct _obb_t OBB;
typedef struct _tri_t Tri;
typedef struct _pol_t Pol;
typedef struct _shape_t Shape;
typedef struct _dist_t Dist;
typedef struct _app_t App;

typedef enum _shtype_t
{
    ekPOINT,
    ekPOINT_CLOUD,
    ekSEGMENT,
    ekCIRCLE,
    ekBOX,
    ekOBB,
    ekTRIANGLE,
    ekCONVEX_POLY,
    ekSIMPLE_POLY
} shtype_t;

struct _cloud_t
{
    ArrSt(V2Df) *pnts;
    Box2Df box;
    V2Df center;
    real32_t width;
    real32_t height;
    real32_t angle;
    uint32_t ctype, type;

    union
    {
        Cir2Df cir;
        OBB2Df *obb;
        Pol2Df *poly;
    } bound;
};

struct _seg_t
{
    V2Df center;
    real32_t length;
    real32_t angle;
    Seg2Df seg;
};

struct _box_t
{
    V2Df center;
    real32_t width;
    real32_t height;
    Box2Df box;
};

struct _obb_t
{
    V2Df center;
    real32_t width;
    real32_t height;
    real32_t angle;
    OBB2Df *obb;
};

struct _tri_t
{
    V2Df center;
    real32_t angle;
    real32_t scale;
    T2Df t2d;
    Tri2Df tri;
};

struct _pol_t
{
    V2Df center;
    real32_t angle;
    real32_t scale;
    T2Df t2d;
    Pol2Df *pol;
};

struct _shape_t
{
    shtype_t type;
    bool_t mouse;
    uint32_t collisions;

    union {
        V2Df pnt;
        Cloud cloud;
        Seg seg;
        Cir2Df cir;
        Box box;
        OBB obb;
        Tri tri;
        Pol pol;
    } body;
};

struct _dist_t
{
    V2Df p0;
    V2Df p1;
};

struct _app_t
{
    Window *window;
    View *view;
    Layout *main_layout;
    Layout *pnt_layout;
    Layout *cld_layout;
    Layout *seg_layout;
    Layout *cir_layout;
    Layout *box_layout;
    Layout *obb_layout;
    Layout *tri_layout;
    Layout *pol_layout;
    Panel *obj_panel;
    ArrSt(Shape) *shapes;
    ArrSt(Dist) *dists;
    shtype_t seltype;
    uint32_t selshape;
    bool_t show_seg_pt;
    bool_t show_triangles;
    bool_t show_convex_parts;
    real32_t sel_area;
    V2Df mouse_pos;
    V2Df obj_pos;
};

#endif
Listado 3: howto/col2dhello/col2dgui.c
   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
/* Col2D Hello GUI */

#include "nappgui.h"
#include "col2dgui.h"

/*---------------------------------------------------------------------------*/

void col2dhello_dbind(void)
{
    dbind_enum(shtype_t, ekPOINT, "");
    dbind_enum(shtype_t, ekPOINT_CLOUD, "");
    dbind_enum(shtype_t, ekSEGMENT, "");
    dbind_enum(shtype_t, ekCIRCLE, "");
    dbind_enum(shtype_t, ekBOX, "");
    dbind_enum(shtype_t, ekOBB, "");
    dbind_enum(shtype_t, ekTRIANGLE, "");
    dbind_enum(shtype_t, ekCONVEX_POLY, "");
    dbind_enum(shtype_t, ekSIMPLE_POLY, "");
    dbind(App, shtype_t, seltype);
    dbind(App, bool_t, show_seg_pt);
    dbind(App, bool_t, show_triangles);
    dbind(App, bool_t, show_convex_parts);
    dbind(App, real32_t, sel_area);
    dbind(Cloud, real32_t, width);
    dbind(Cloud, real32_t, height);
    dbind(Cloud, real32_t, angle);
    dbind(Cloud, uint32_t, type);
    dbind(Seg, real32_t, length);
    dbind(Seg, real32_t, angle);
    dbind(Cir2Df, real32_t, r);
    dbind(Box, real32_t, width);
    dbind(Box, real32_t, height);
    dbind(OBB, real32_t, width);
    dbind(OBB, real32_t, height);
    dbind(OBB, real32_t, angle);
    dbind(Tri, real32_t, angle);
    dbind(Tri, real32_t, scale);
    dbind(Pol, real32_t, angle);
    dbind(Pol, real32_t, scale);
    dbind_range(Cloud, real32_t, width, 50, 200);
    dbind_range(Cloud, real32_t, height, 50, 200);
    dbind_range(Cloud, real32_t, angle, 0, 360 * kBMATH_DEG2RADf);
    dbind_range(Seg, real32_t, length, 20, 300);
    dbind_range(Seg, real32_t, angle, 0, 360 * kBMATH_DEG2RADf);
    dbind_range(Cir2Df, real32_t, r, 5, 100);
    dbind_range(Box, real32_t, width, 20, 300);
    dbind_range(Box, real32_t, height, 20, 300);
    dbind_range(OBB, real32_t, width, 20, 300);
    dbind_range(OBB, real32_t, height, .2f, 300);
    dbind_range(OBB, real32_t, angle, 0, 360 * kBMATH_DEG2RADf);
    dbind_range(Tri, real32_t, angle, 0, 360 * kBMATH_DEG2RADf);
    dbind_range(Tri, real32_t, scale, 5, 30);
    dbind_range(Pol, real32_t, angle, 0, 360 * kBMATH_DEG2RADf);
    dbind_range(Pol, real32_t, scale, 5, 30);
}

/*---------------------------------------------------------------------------*/

static void i_OnCloud(App *app, Event *e)
{
    Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
    EvBind *p = event_params(e, EvBind);
    cassert(shape->type == ekPOINT_CLOUD);

    if (evbind_field(p, Cloud, uint32_t, type) == TRUE)
        col2dhello_update_cloud_bounds(&shape->body.cloud);
    else
        col2dhello_update_cloud(&shape->body.cloud);

    col2dhello_collisions(app);
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static void i_OnSeg(App *app, Event *e)
{
    Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
    cassert(shape->type == ekSEGMENT);
    col2dhello_update_seg(&shape->body.seg);
    col2dhello_collisions(app);
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static void i_OnCircle(App *app, Event *e)
{
    col2dhello_collisions(app);
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static void i_OnBox(App *app, Event *e)
{
    Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
    cassert(shape->type == ekBOX);
    col2dhello_update_box(&shape->body.box);
    col2dhello_collisions(app);
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static void i_OnOBB(App *app, Event *e)
{
    Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
    cassert(shape->type == ekOBB);
    col2dhello_update_obb(&shape->body.obb);
    col2dhello_collisions(app);
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static void i_OnTri(App *app, Event *e)
{
    Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
    cassert(shape->type == ekTRIANGLE);
    col2dhello_update_tri(&shape->body.tri);
    col2dhello_collisions(app);
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static void i_OnPoly(App *app, Event *e)
{
    Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
    cassert(shape->type == ekCONVEX_POLY || shape->type == ekSIMPLE_POLY);
    col2dhello_update_pol(&shape->body.pol);
    col2dhello_collisions(app);
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static void i_OnOpt(App *app, Event *e)
{
    col2dhello_update_gui(app);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static Layout *i_empty_layout(void)
{
    Layout *layout = layout_create(1, 1);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_point_layout(App *app)
{
    Layout *layout = layout_create(1, 1);
    Label *label = label_create();
    label_text(label, "Selected Point");
    layout_label(layout, label, 0, 0);
    app->pnt_layout = layout;
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_bounding_layout(void)
{
    Layout *layout = layout_create(1, 5);
    Button *button1 = button_radio();
    Button *button2 = button_radio();
    Button *button3 = button_radio();
    Button *button4 = button_radio();
    Button *button5 = button_radio();
    button_text(button1, "BBox Circle");
    button_text(button2, "Points Circle");
    button_text(button3, "Minimum Circle");
    button_text(button4, "Gaussian OBB");
    button_text(button5, "Convex Hull");
    layout_button(layout, button1, 0, 0);
    layout_button(layout, button2, 0, 1);
    layout_button(layout, button3, 0, 2);
    layout_button(layout, button4, 0, 3);
    layout_button(layout, button5, 0, 4);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 1, 5);
    layout_vmargin(layout, 2, 5);
    layout_vmargin(layout, 3, 5);
    cell_dbind(layout_cell(layout, 0, 0), Cloud, uint32_t, type);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_cloud_layout(App *app)
{
    Layout *layout1 = layout_create(1, 9);
    Layout *layout2 = i_bounding_layout();
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    Slider *slider3 = slider_create();
    label_text(label1, "Selected Point Cloud");
    label_text(label2, "Width:");
    label_text(label3, "Height:");
    label_text(label4, "Angle:");
    label_text(label5, "Bounding Volume");
    layout_label(layout1, label1, 0, 0);
    layout_label(layout1, label2, 0, 1);
    layout_label(layout1, label3, 0, 3);
    layout_label(layout1, label4, 0, 5);
    layout_label(layout1, label5, 0, 7);
    layout_slider(layout1, slider1, 0, 2);
    layout_slider(layout1, slider2, 0, 4);
    layout_slider(layout1, slider3, 0, 6);
    layout_layout(layout1, layout2, 0, 8);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 2, 10);
    layout_vmargin(layout1, 4, 10);
    layout_vmargin(layout1, 6, 5);
    layout_vmargin(layout1, 7, 8);
    cell_dbind(layout_cell(layout1, 0, 2), Cloud, real32_t, width);
    cell_dbind(layout_cell(layout1, 0, 4), Cloud, real32_t, height);
    cell_dbind(layout_cell(layout1, 0, 6), Cloud, real32_t, angle);
    layout_dbind(layout1, listener(app, i_OnCloud, App), Cloud);
    app->cld_layout = layout1;
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_segment_layout(App *app)
{
    Layout *layout = layout_create(1, 5);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    label_text(label1, "Selected Segment");
    label_text(label2, "Length:");
    label_text(label3, "Angle:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 3);
    layout_slider(layout, slider1, 0, 2);
    layout_slider(layout, slider2, 0, 4);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 2, 10);
    cell_dbind(layout_cell(layout, 0, 2), Seg, real32_t, length);
    cell_dbind(layout_cell(layout, 0, 4), Seg, real32_t, angle);
    layout_dbind(layout, listener(app, i_OnSeg, App), Seg);
    app->seg_layout = layout;
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_circle_layout(App *app)
{
    Layout *layout = layout_create(1, 3);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Slider *slider = slider_create();
    label_text(label1, "Selected Circle");
    label_text(label2, "Radix:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_slider(layout, slider, 0, 2);
    layout_vmargin(layout, 0, 5);
    cell_dbind(layout_cell(layout, 0, 2), Cir2Df, real32_t, r);
    layout_dbind(layout, listener(app, i_OnCircle, App), Cir2Df);
    app->cir_layout = layout;
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_box_layout(App *app)
{
    Layout *layout = layout_create(1, 5);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    label_text(label1, "Selected Box");
    label_text(label2, "Width:");
    label_text(label3, "Height:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 3);
    layout_slider(layout, slider1, 0, 2);
    layout_slider(layout, slider2, 0, 4);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 2, 10);
    cell_dbind(layout_cell(layout, 0, 2), Box, real32_t, width);
    cell_dbind(layout_cell(layout, 0, 4), Box, real32_t, height);
    layout_dbind(layout, listener(app, i_OnBox, App), Box);
    app->box_layout = layout;
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_obb_layout(App *app)
{
    Layout *layout = layout_create(1, 7);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    Slider *slider3 = slider_create();
    label_text(label1, "Selected Oriented Box");
    label_text(label2, "Width:");
    label_text(label3, "Height:");
    label_text(label4, "Angle:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 3);
    layout_label(layout, label4, 0, 5);
    layout_slider(layout, slider1, 0, 2);
    layout_slider(layout, slider2, 0, 4);
    layout_slider(layout, slider3, 0, 6);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 2, 10);
    layout_vmargin(layout, 4, 10);
    cell_dbind(layout_cell(layout, 0, 2), OBB, real32_t, width);
    cell_dbind(layout_cell(layout, 0, 4), OBB, real32_t, height);
    cell_dbind(layout_cell(layout, 0, 6), OBB, real32_t, angle);
    layout_dbind(layout, listener(app, i_OnOBB, App), OBB);
    app->obb_layout = layout;
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_tri_layout(App *app)
{
    Layout *layout = layout_create(1, 5);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    label_text(label1, "Selected Triangle");
    label_text(label2, "Angle:");
    label_text(label3, "Scale:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 3);
    layout_slider(layout, slider1, 0, 2);
    layout_slider(layout, slider2, 0, 4);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 2, 10);
    cell_dbind(layout_cell(layout, 0, 2), Tri, real32_t, angle);
    cell_dbind(layout_cell(layout, 0, 4), Tri, real32_t, scale);
    layout_dbind(layout, listener(app, i_OnTri, App), Tri);
    app->tri_layout = layout;
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_pol_layout(App *app)
{
    Layout *layout = layout_create(1, 5);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    label_text(label1, "Selected Polygon");
    label_text(label2, "Angle:");
    label_text(label3, "Scale:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 3);
    layout_slider(layout, slider1, 0, 2);
    layout_slider(layout, slider2, 0, 4);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 2, 10);
    cell_dbind(layout_cell(layout, 0, 2), Pol, real32_t, angle);
    cell_dbind(layout_cell(layout, 0, 4), Pol, real32_t, scale);
    layout_dbind(layout, listener(app, i_OnPoly, App), Pol);
    app->pol_layout = layout;
    return layout;
}

/*---------------------------------------------------------------------------*/

static void i_OnNewShape(App *app, Event *e)
{
    S2Df size;
    view_get_size(app->view, &size);
    col2dhello_new_shape(app, v2df(size.width / 2, size.height / 2));
    col2dhello_dbind_shape(app);
    col2dhello_collisions(app);
    view_update(app->view);
    unref(e);
}

/*---------------------------------------------------------------------------*/

static Layout *i_new_layout(App *app)
{
    Layout *layout = layout_create(1, 2);
    PopUp *popup = popup_create();
    Button *button = button_push();
    button_text(button, "New Shape");
    button_OnClick(button, listener(app, i_OnNewShape, App));
    layout_popup(layout, popup, 0, 0);
    layout_button(layout, button, 0, 1);
    layout_vmargin(layout, 0, 5);
    cell_dbind(layout_cell(layout, 0, 0), App, shtype_t, seltype);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_area_layout(void)
{
    Layout *layout = layout_create(2, 1);
    Label *label1 = label_create();
    Label *label2 = label_create();
    label_text(label1, "Area:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 1, 0);
    layout_hmargin(layout, 0, 5);
    layout_halign(layout, 1, 0, ekJUSTIFY);
    layout_hexpand(layout, 1);
    cell_dbind(layout_cell(layout, 1, 0), App, real32_t, sel_area);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_left_layout(App *app)
{
    Layout *layout1 = layout_create(1, 6);
    Layout *layout2 = i_new_layout(app);
    Layout *layout3 = i_area_layout();
    Layout *layout4 = i_empty_layout();
    Layout *layout5 = i_point_layout(app);
    Layout *layout6 = i_cloud_layout(app);
    Layout *layout7 = i_segment_layout(app);
    Layout *layout8 = i_circle_layout(app);
    Layout *layout9 = i_box_layout(app);
    Layout *layout10 = i_obb_layout(app);
    Layout *layout11 = i_tri_layout(app);
    Layout *layout12 = i_pol_layout(app);
    Button *button1 = button_check();
    Button *button2 = button_check();
    Button *button3 = button_check();
    Panel *panel = panel_create();
    button_text(button1, "Show Segment-Point distance");
    button_text(button2, "Show Polygon triangles");
    button_text(button3, "Show Convex partition");
    panel_layout(panel, layout4);
    panel_layout(panel, layout5);
    panel_layout(panel, layout6);
    panel_layout(panel, layout7);
    panel_layout(panel, layout8);
    panel_layout(panel, layout9);
    panel_layout(panel, layout10);
    panel_layout(panel, layout11);
    panel_layout(panel, layout12);
    layout_layout(layout1, layout2, 0, 0);
    layout_button(layout1, button1, 0, 1);
    layout_button(layout1, button2, 0, 2);
    layout_button(layout1, button3, 0, 3);
    layout_layout(layout1, layout3, 0, 4);
    layout_panel(layout1, panel, 0, 5);
    layout_vmargin(layout1, 0, 10);
    layout_vmargin(layout1, 1, 5);
    layout_vmargin(layout1, 2, 5);
    layout_vmargin(layout1, 3, 5);
    layout_vmargin(layout1, 4, 10);
    layout_margin(layout1, 10);
    app->obj_panel = panel;
    app->main_layout = layout1;
    cell_dbind(layout_cell(layout1, 0, 1), App, bool_t, show_seg_pt);
    cell_dbind(layout_cell(layout1, 0, 2), App, bool_t, show_triangles);
    cell_dbind(layout_cell(layout1, 0, 3), App, bool_t, show_convex_parts);
    layout_dbind(layout1, listener(app, i_OnOpt, App), App);
    layout_dbind_obj(layout1, app, App);        
    return layout1;
}

/*---------------------------------------------------------------------------*/

static color_t i_color(const uint32_t collision, const bool_t mouse)
{
    if (collision > 0)
    {
        if (collision == 1)
            return color_rgb(255, 170, 0);

        if (collision == 2)
            return color_rgb(255, 127, 0);

        return color_rgb(255, 42, 0);
    }
    else
    {
        if (mouse == TRUE)
            return color_rgb(127, 85, 255);

        return color_gray(120);
    }
}

/*---------------------------------------------------------------------------*/

static void i_draw_point(DCtx *ctx, const V2Df *pt)
{
    draw_v2df(ctx, ekFILL, pt, CENTER_RADIUS);
}

/*---------------------------------------------------------------------------*/

static void i_draw_cloud(DCtx *ctx, const Cloud *cloud)
{
    arrst_foreach(pt, cloud->pnts, V2Df)
        draw_circle(ctx, ekSTROKE, pt->x + cloud->center.x, pt->y + cloud->center.y, 1);
    arrst_end();

    switch(cloud->type) {
    case 0:
    case 1:
    case 2:
    {
        real32_t cx = cloud->bound.cir.c.x + cloud->center.x;
        real32_t cy = cloud->bound.cir.c.y + cloud->center.y;
        draw_circle(ctx, ekSTROKE, cx, cy, cloud->bound.cir.r);
        draw_fill_color(ctx, kCOLOR_BLACK);
        draw_circle(ctx, ekFILL, cx, cy, CENTER_RADIUS);
        break;
    }

    case 3:
    {
        T2Df t2d;
        V2Df center = obb2d_centerf(cloud->bound.obb);
        t2d_movef(&t2d, kT2D_IDENTf, cloud->center.x, cloud->center.y);
        draw_matrixf(ctx, &t2d);
        draw_obb2df(ctx, ekSTROKE, cloud->bound.obb);
        draw_fill_color(ctx, kCOLOR_BLACK);
        draw_circle(ctx, ekFILL, center.x, center.y, CENTER_RADIUS);
        draw_matrixf(ctx, kT2D_IDENTf);
        break;
    }

    case 4:
    {
        T2Df t2d;
        V2Df center = pol2d_centroidf(cloud->bound.poly);
        t2d_movef(&t2d, kT2D_IDENTf, cloud->center.x, cloud->center.y);
        draw_matrixf(ctx, &t2d);
        draw_pol2df(ctx, ekSTROKE, cloud->bound.poly);
        draw_fill_color(ctx, kCOLOR_BLACK);
        draw_circle(ctx, ekFILL, center.x, center.y, CENTER_RADIUS);
        draw_matrixf(ctx, kT2D_IDENTf);
        break;
    }

    cassert_default();
    }
}

/*---------------------------------------------------------------------------*/

static void i_draw_segment(DCtx *ctx, const Seg *seg)
{
    draw_seg2df(ctx, &seg->seg);
}

/*---------------------------------------------------------------------------*/

static void i_draw_circle(DCtx *ctx, const Cir2Df *circle)
{
    draw_cir2df(ctx, ekFILL, circle);
    draw_fill_color(ctx, kCOLOR_BLACK);
    draw_circle(ctx, ekFILL, circle->c.x, circle->c.y, CENTER_RADIUS);
}

/*---------------------------------------------------------------------------*/

static void i_draw_box(DCtx *ctx, const Box *box)
{
    draw_box2df(ctx, ekFILL, &box->box);
    draw_fill_color(ctx, kCOLOR_BLACK);
    draw_circle(ctx, ekFILL, box->center.x, box->center.y, CENTER_RADIUS);
}

/*---------------------------------------------------------------------------*/

static void i_draw_obb(DCtx *ctx, const OBB *obb)
{
    draw_obb2df(ctx, ekFILL, obb->obb);
    draw_fill_color(ctx, kCOLOR_BLACK);
    draw_circle(ctx, ekFILL, obb->center.x, obb->center.y, CENTER_RADIUS);
}

/*---------------------------------------------------------------------------*/

static void i_draw_tri(DCtx *ctx, const Tri *tri)
{
    V2Df center = tri2d_centroidf(&tri->tri);
    draw_tri2df(ctx, ekFILL, &tri->tri);
    draw_fill_color(ctx, kCOLOR_BLACK);
    draw_circle(ctx, ekFILL, center.x, center.y, CENTER_RADIUS);
}

/*---------------------------------------------------------------------------*/

static void i_draw_poly(DCtx *ctx, const Pol *pol)
{
    V2Df center = pol2d_visual_centerf(pol->pol, .05f);
    draw_pol2df(ctx, ekFILL, pol->pol);
    draw_fill_color(ctx, kCOLOR_BLACK);
    draw_circle(ctx, ekFILL, center.x, center.y, CENTER_RADIUS);
}

/*---------------------------------------------------------------------------*/

static void i_draw_poly_triangles(DCtx *ctx, const Pol2Df *poly)
{
    ArrSt(Tri2Df) *triangles = pol2d_trianglesf(poly);
    bool_t ccw = pol2d_ccwf(poly);

    arrst_foreach(tri, triangles, Tri2Df)
        cassert_unref(tri2d_ccwf(tri) == ccw, ccw);
        draw_tri2df(ctx, ekSTROKE, tri);
    arrst_end();
    arrst_destroy(&triangles, NULL, Tri2Df);
}

/*---------------------------------------------------------------------------*/

static void i_draw_poly_convex_parts(DCtx *ctx, const Pol2Df *poly)
{
    ArrPt(Pol2Df) *convex_polys = pol2d_convex_partitionf(poly);
    bool_t ccw = pol2d_ccwf(poly);

    arrpt_foreach(convex, convex_polys, Pol2Df)
        cassert(pol2d_convexf(convex) == TRUE);
        cassert_unref(pol2d_ccwf(convex) == ccw, ccw);
        draw_pol2df(ctx, ekSTROKE, convex);
    arrpt_end();

    arrpt_destroy(&convex_polys, pol2d_destroyf, Pol2Df);
}

/*---------------------------------------------------------------------------*/

static void i_draw_bbox(DCtx *ctx, const Shape *shape)
{
    Box2Df bbox = kBOX2D_NULLf;
    real32_t p[2] = {2, 2};
    switch(shape->type) {
    case ekPOINT:
    {
        Cir2Df c = cir2df(shape->body.pnt.x, shape->body.pnt.y, CENTER_RADIUS);
        box2d_add_circlef(&bbox, &c);
        break;
    }

    case ekPOINT_CLOUD:
        bbox = col2dhello_cloud_box(&shape->body.cloud);
        break;

    case ekSEGMENT:
        box2d_addf(&bbox, &shape->body.seg.seg.p0);
        box2d_addf(&bbox, &shape->body.seg.seg.p1);
        break;

    case ekCIRCLE:
        box2d_add_circlef(&bbox, &shape->body.cir);
        break;

    case ekBOX:
        box2d_mergef(&bbox, &shape->body.box.box);
        break;

    case ekOBB:
    {
        const V2Df *corners = obb2d_cornersf(shape->body.obb.obb);
        box2d_addnf(&bbox, corners, 4);
        break;
    }

    case ekTRIANGLE:
    {
        const V2Df *points = (const V2Df*)&shape->body.tri.tri;
        box2d_addnf(&bbox, points, 3);
        break;
    }

    case ekCONVEX_POLY:
    case ekSIMPLE_POLY:
    {
        const V2Df *points = pol2d_pointsf(shape->body.pol.pol);
        uint32_t n = pol2d_nf(shape->body.pol.pol);
        box2d_addnf(&bbox, points, n);
        break;
    }

    cassert_default();
    }

    draw_line_color(ctx, color_rgb(0, 128, 0));
    draw_line_dash(ctx, p, 2);
    draw_box2df(ctx, ekSTROKE, &bbox);
    draw_line_dash(ctx, NULL, 0);
}

/*---------------------------------------------------------------------------*/

static void i_OnDraw(App *app, Event *e)
{
    const EvDraw *p = event_params(e, EvDraw);
    real32_t dash[2] = {2,2};
    draw_clear(p->ctx, color_rgb(255, 212, 255));

    arrst_foreach(shape, app->shapes, Shape)
        draw_fill_color(p->ctx, i_color(shape->collisions, shape->mouse));
        draw_line_color(p->ctx, i_color(shape->collisions, shape->mouse));
        
        switch(shape->type) {
        case ekPOINT:
            i_draw_point(p->ctx, &shape->body.pnt);
            break;

        case ekPOINT_CLOUD:
            i_draw_cloud(p->ctx, &shape->body.cloud);
            break;

        case ekSEGMENT:
            i_draw_segment(p->ctx, &shape->body.seg);
            break;

        case ekCIRCLE:
            i_draw_circle(p->ctx, &shape->body.cir);
            break;

        case ekBOX:
            i_draw_box(p->ctx, &shape->body.box);
            break;

        case ekOBB:
            i_draw_obb(p->ctx, &shape->body.obb);
            break;

        case ekTRIANGLE:
            i_draw_tri(p->ctx, &shape->body.tri);
            break;

        case ekCONVEX_POLY:
        case ekSIMPLE_POLY:
            i_draw_poly(p->ctx, &shape->body.pol);
            break;

        cassert_default();
        }

        if (app->selshape == shape_i)
            i_draw_bbox(p->ctx, shape);

    arrst_end()

    if (app->show_seg_pt == TRUE)
    {
        real32_t pattern[2] = {2, 2};
        draw_line_dash(p->ctx, pattern, 2);
        draw_line_color(p->ctx, kCOLOR_MAGENTA);
        arrst_foreach(dist, app->dists, Dist)
            draw_line(p->ctx, dist->p0.x, dist->p0.y, dist->p1.x, dist->p1.y);
        arrst_end();
    }

    draw_line_width(p->ctx, 1);
    draw_line_color(p->ctx, kCOLOR_BLACK);
    draw_line_dash(p->ctx, dash, 2);

    if (app->show_triangles == TRUE)
    {
        arrst_foreach(shape, app->shapes, Shape)
            if (shape->type == ekCONVEX_POLY || shape->type == ekSIMPLE_POLY)
                i_draw_poly_triangles(p->ctx, shape->body.pol.pol);
        arrst_end();
    }

    if (app->show_triangles == FALSE && app->show_convex_parts == TRUE)
    {
        arrst_foreach(shape, app->shapes, Shape)
            if (shape->type == ekSIMPLE_POLY)
                i_draw_poly_convex_parts(p->ctx, shape->body.pol.pol);
        arrst_end();
    }

    draw_line_dash(p->ctx, NULL, 2);
}

/*---------------------------------------------------------------------------*/

static void i_OnMove(App *app, Event *e)
{
    const EvMouse *p = event_params(e, EvMouse);
    View *view = event_sender(e, View);
    col2dhello_mouse_collisions(app, p->x, p->y);
    view_update(view);
}

/*---------------------------------------------------------------------------*/

static void i_get_shape_pos(const Shape *shape, V2Df *pos)
{
    switch(shape->type) {
    case ekPOINT:
        *pos = shape->body.pnt;
        break;

    case ekPOINT_CLOUD:
        *pos = shape->body.cloud.center;
        break;

    case ekSEGMENT:
        *pos = shape->body.seg.center;
        break;

    case ekCIRCLE:
        *pos = shape->body.cir.c;
        break;

    case ekBOX:
        *pos = shape->body.box.center;
        break;

    case ekOBB:
        *pos = shape->body.obb.center;
        break;

    case ekTRIANGLE:
        *pos = shape->body.tri.center;
        *pos = shape->body.tri.center;
        break;

    case ekCONVEX_POLY:
    case ekSIMPLE_POLY:
        *pos = shape->body.pol.center;
        break;

    cassert_default();
    }
}

/*---------------------------------------------------------------------------*/

static void i_set_shape_pos(Shape *shape, const V2Df pos)
{
    switch(shape->type) {
    case ekPOINT:
        shape->body.pnt = pos;
        break;

    case ekPOINT_CLOUD:
        shape->body.cloud.center = pos;
        break;

    case ekSEGMENT:
        shape->body.seg.center = pos;
        col2dhello_update_seg(&shape->body.seg);
        break;

    case ekCIRCLE:
        shape->body.cir.c = pos;
        break;

    case ekBOX:
        shape->body.box.center = pos;
        col2dhello_update_box(&shape->body.box);
        break;

    case ekOBB:
        shape->body.obb.center = pos;
        col2dhello_update_obb(&shape->body.obb);
        break;

    case ekTRIANGLE:
        shape->body.tri.center = pos;
        col2dhello_update_tri(&shape->body.tri);
        break;

    case ekCONVEX_POLY:
    case ekSIMPLE_POLY:
        shape->body.pol.center = pos;
        col2dhello_update_pol(&shape->body.pol);
        break;

    cassert_default();
    }
}

/*---------------------------------------------------------------------------*/

static void i_OnDown(App *app, Event *e)
{
    uint32_t selshape = UINT32_MAX;
    arrst_foreach(shape, app->shapes, Shape)
        if (shape->mouse == TRUE)
        {
            selshape = shape_i;
            break;
        }
    arrst_end();

    if (selshape != app->selshape)
    {
        View *view = event_sender(e, View);
        app->selshape = selshape;
        col2dhello_dbind_shape(app);
        view_update(view);
    }

    if (app->selshape != UINT32_MAX)
    {
        const EvMouse *p = event_params(e, EvMouse);
        const Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
        app->mouse_pos.x = p->x;
        app->mouse_pos.y = p->y;
        i_get_shape_pos(shape, &app->obj_pos);
    }
}

/*---------------------------------------------------------------------------*/

static void i_OnDrag(App *app, Event *e)
{
    if (app->selshape != UINT32_MAX)
    {
        const EvMouse *p = event_params(e, EvMouse);
        Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
        V2Df move = v2df(app->obj_pos.x + (p->x - app->mouse_pos.x), app->obj_pos.y + (p->y - app->mouse_pos.y));
        i_set_shape_pos(shape, move);
        col2dhello_collisions(app);
        view_update(app->view);
    }
}

/*---------------------------------------------------------------------------*/

static Layout *i_layout(App *app)
{
    Layout *layout1 = layout_create(2, 1);
    Layout *layout2 = i_left_layout(app);
    View *view = view_create();
    view_size(view, s2df(640, 580));
    view_OnDraw(view, listener(app, i_OnDraw, App));
    view_OnMove(view, listener(app, i_OnMove, App));
    view_OnDown(view, listener(app, i_OnDown, App));
    view_OnDrag(view, listener(app, i_OnDrag, App));
    layout_layout(layout1, layout2, 0, 0);
    layout_view(layout1, view, 1, 0);
    layout_valign(layout1, 0, 0, ekTOP);
    layout_hexpand(layout1, 1);
    app->view = view;
    return layout1;
}

/*---------------------------------------------------------------------------*/

Window *col2dhello_window(App *app)
{
    Panel *panel = panel_create();
    Layout *layout = i_layout(app);
    Window *window = NULL;
    panel_layout(panel, layout);
    window = window_create(ekWNSRES, &panel);
    return window;
}

/*---------------------------------------------------------------------------*/

void col2dhello_dbind_shape(App *app)
{
    if (app->selshape != UINT32_MAX)
    {
        Shape *shape = arrst_get(app->shapes, app->selshape, Shape);
        switch(shape->type) {
        case ekPOINT:
            panel_visible_layout(app->obj_panel, 1);
            app->sel_area = 0;
            break;

        case ekPOINT_CLOUD:
            layout_dbind_obj(app->cld_layout, &shape->body.cloud, Cloud);
            panel_visible_layout(app->obj_panel, 2);
            app->sel_area = 0;
            break;

        case ekSEGMENT:
            layout_dbind_obj(app->seg_layout, &shape->body.seg, Seg);
            panel_visible_layout(app->obj_panel, 3);
            app->sel_area = 0;
            break;

        case ekCIRCLE:
            layout_dbind_obj(app->cir_layout, &shape->body.cir, Cir2Df);
            panel_visible_layout(app->obj_panel, 4);
            app->sel_area = cir2d_areaf(&shape->body.cir);
            break;

        case ekBOX:
            layout_dbind_obj(app->box_layout, &shape->body.box, Box);
            panel_visible_layout(app->obj_panel, 5);
            break;

        case ekOBB:
            layout_dbind_obj(app->obb_layout, &shape->body.obb, OBB);
            panel_visible_layout(app->obj_panel, 6);
            break;

        case ekTRIANGLE:
            layout_dbind_obj(app->tri_layout, &shape->body.tri, Tri);
            panel_visible_layout(app->obj_panel, 7);
            break;

        case ekCONVEX_POLY:
        case ekSIMPLE_POLY:
            layout_dbind_obj(app->pol_layout, &shape->body.pol, Pol);
            panel_visible_layout(app->obj_panel, 8);
            break;

        cassert_default();
        }
    }
    else
    {
        layout_dbind_obj(app->cld_layout, NULL, Cloud);
        layout_dbind_obj(app->seg_layout, NULL, Seg);
        layout_dbind_obj(app->cir_layout, NULL, Cir2Df);
        layout_dbind_obj(app->box_layout, NULL, Box);
        layout_dbind_obj(app->obb_layout, NULL, OBB);
        layout_dbind_obj(app->tri_layout, NULL, Tri);
        layout_dbind_obj(app->pol_layout, NULL, Pol);
        panel_visible_layout(app->obj_panel, 0);
    }

    col2dhello_update_gui(app);
}
❮ Anterior
Siguiente ❯