Discussion :

[comtois]

Voir le lien en bas de ce message pour plus de détails, je ne copie pas tout ici , mais pour info il s'agit d'une bibliothèque basée sur les moteurs physiques Box2D et LiquidFun.

Une vidéo de la démo fournie avec la bibliothèque.

https://youtu.be/zdUW69nzy8w

Vous pouvez télécharger la biblio à cette adresse

https://github.com/seanhaydongriffin/PB-LiquidFun-C


Source de l'information

[comtois]

Pour avoir un aperçu, voici le code source de la démo (voir la vidéo mentionnée ci-dessus)

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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
XIncludeFile "LiquidFun-C.pbi"
XIncludeFile "LiquidFun-C-Ex.pbi"
 
; #GLOBALS# ===================================================================================================================
 
Global num_frames.i = 0
Global fps.i = 0
Global animation_speed.f = 1.0
Global is_convex_and_clockwise.i
Global curr_particle_system_name.s = "water"
Global player_main_body_name.s = "boat"
Global player_spinning_body_name.s = "boat prop"
Global player_tracking.i = 0
Global player_tracking_angle.d = 0
Global fixture_outlining.i = 0
Global frame_limit.i = 1
 
; Box2D Bodies
Global body_mass.d
Global body_user_applied_linear_force.d = 100
Global body_user_applied_angular_force.d = 10
 
; Box2D Fixtures
Global Dim tmp_fixture_vector.b2Vec2(50)
Global Dim tmp_quad.b2Vec2(2)
Global tmp_fixture_vector_num = -1
Global tmp_fixture_vector_size = -1
Global Dim tmp_fixture_angle.f(50)
 
; ===============================================================================================================================
 
; #VARIABLES# ===================================================================================================================
; ===============================================================================================================================
 
; #FUNCTIONS# ===================================================================================================================
Declare text_window_handler(*Value)
; ===============================================================================================================================
 
 
; =======================
; Setup Box2D / LiquidFun
; =======================
 
; Setup the Box2D World (gravity_x, gravity_y, and load textures, bodies And fixtures from JSON files)
b2World_CreateEx(0.0, -10.0)
;b2World_CreateEx(0.0, 0.0)
 
; Create the Box2D Bodies, Fixtures and the LiquidFun Particle System
b2World_CreateAll()
 
; ============
; Setup OpenGL
; ============
 
; Setup the OpenGL Windows
glWindow_Setup(0, 0, 800, 600, "LiquidFun Demo for PureBasic", 0, 0, 800, 600, 400, 500, $006600, #Black)
 
; Setup the OpenGL World
;glWorld_Setup(30.0, 200/200, 1.0, 1000.0, 0, 0, -190.0)
glWorld_Setup(30.0, 800/600, 1.0, 1000.0, 0, -10, -190.0)
 
; Create the OpenGL Textures
glWorld_CreateTextures()
 
; ========================
; Setup Threads and Timers
; ========================
 
frame_timer = ElapsedMilliseconds()
fps_timer = -9999
 
Repeat
 
  ; Every 1 / 60th of a second, or 16 milliseconds (or 60 frames per second)
  If (ElapsedMilliseconds() - frame_timer) > 16 Or frame_limit = 0
 
    frame_timer = ElapsedMilliseconds()
 
    key_event.i = -1
    mouse_event.i = -1
    Eventxx = WindowEvent()
 
    Select EventType()
 
      Case #PB_EventType_KeyUp
 
        key_event = GetGadgetAttribute(0,#PB_OpenGL_Key)
 
      Case #PB_EventType_MouseMove, #PB_EventType_LeftButtonDown, #PB_EventType_LeftButtonUp, #PB_EventType_RightButtonUp, #PB_EventType_MouseWheel
 
        mouse_event = EventType()
    EndSelect
 
    ; =================
    ; Keyboard handling
    ; =================
 
    ; For all menus
 
    If key_event > -1
 
      Select key_event
 
          ; if Escape is pressed then toggle menus or quit demo
        Case #PB_Shortcut_Escape
 
          end_game = 1
 
          ; if 1 is pressed then display the main menu
        Case #PB_Shortcut_1
 
          menu_type = #main_menu
 
          ; if 2 is pressed then display the player menu
        Case #PB_Shortcut_2
 
          menu_type = #player_menu
 
          ; if 3 is pressed then display the particle menu
        Case #PB_Shortcut_3
 
          menu_type = #particle_menu
 
          ; if 4 is pressed then display the editing menu
        Case #PB_Shortcut_4
 
          menu_type = #edit_menu
 
          ; if R is pressed then reset the Box2D World
        Case #PB_Shortcut_R
 
          player_tracking = 0
 
          ; destroy the recreate the scene
          b2World_DestroyAll()
          b2World_CreateAll()            
      EndSelect   
    EndIf
 
    Select menu_type
 
        ; main menu (keyboard)
      Case #main_menu
 
        If key_event > -1
 
          Select key_event
 
            Case #PB_Shortcut_B
 
              If body("bucket")\active = 0
 
                b2World_CreateBodyAndFixtures("bucket")
                b2World_CreateBodyAndFixtures("bucket ball")
              Else
 
                b2World_DestroyBodyEx("bucket")
                b2World_DestroyBodyEx("bucket ball")
              EndIf
 
            Case #PB_Shortcut_O
 
              If fixture_outlining = 0
 
                fixture_outlining = 1
                b2World_SetFixturesDrawType(#gl_texture2_and_line_loop2)
              Else
 
                fixture_outlining = 0
                b2World_SetFixturesDrawType(-1)
              EndIf
 
            Case #PB_Shortcut_F
 
              If frame_limit = 0
 
                frame_limit = 1
              Else
 
                frame_limit = 0
              EndIf
 
          EndSelect
        EndIf
 
        If GetAsyncKeyState_(#VK_Q)
 
          b2Body_AddAngularVelocity(body("ground")\ptr, Radian(1))
        EndIf
 
        If GetAsyncKeyState_(#VK_E)
 
          b2Body_AddAngularVelocity(body("ground")\ptr, Radian(-1))
        EndIf
 
        ; player menu (keyboard)
      Case #player_menu
 
        If key_event > -1
 
          Select key_event
 
            Case #PB_Shortcut_T
 
              If player_tracking = 0
 
                player_tracking = 1
                b2World_FollowBody(player_main_body_name, 1)
              Else
 
                player_tracking = 0
              EndIf
 
            Case #PB_Shortcut_X
 
              b2Body_GetPositionEx(player_main_body_name)
              b2Body_GetAngleEx(player_main_body_name)
              b2Body_GetLinearVelocityEx(player_main_body_name)
              b2Body_GetAngularVelocityEx(player_main_body_name)
 
              Select player_main_body_name
 
                Case "boat"
 
                  b2World_DestroyBodyAndJoints("boat prop")
                  b2World_DestroyBodyAndJoints("boat")
 
                  body("car")\currentPositionX = body("boat")\currentPositionX
                  body("car")\currentPositionY = body("boat")\currentPositionY + 3
                  body("car")\currentAngle = body("boat")\currentAngle
                  body("car")\currentLinearVelocityX = body("boat")\currentLinearVelocityX
                  body("car")\currentLinearVelocityY = body("boat")\currentLinearVelocityY
                  body("car")\currentAngularVelocity = body("boat")\currentAngularVelocity
                  body("wheel1")\currentPositionX = body("car")\currentPositionX - 2
                  body("wheel1")\currentPositionY = body("car")\currentPositionY - 3
                  body("wheel2")\currentPositionX = body("car")\currentPositionX + 2
                  body("wheel2")\currentPositionY = body("car")\currentPositionY - 3
 
                  b2World_CreateBodyAndFixtures("car")
                  b2World_CreateBodyAndFixturesAndJoints("wheel1")
                  b2World_CreateBodyAndFixturesAndJoints("wheel2")
 
                  player_main_body_name = "car"
                  player_spinning_body_name = "wheel1"
 
                Case "car"
 
                  b2World_DestroyBodyAndJoints("wheel1")
                  b2World_DestroyBodyAndJoints("wheel2")
                  b2World_DestroyBodyAndJoints("car")
 
                  body("boat")\currentPositionX = body("car")\currentPositionX ;tmp_pos(0)
                  body("boat")\currentPositionY = body("car")\currentPositionY ;tmp_pos(1)
                  body("boat")\currentAngle = body("car")\currentAngle
                  body("boat")\currentLinearVelocityX = body("car")\currentLinearVelocityX ;tmp_vel(0)
                  body("boat")\currentLinearVelocityY = body("car")\currentLinearVelocityY ;tmp_vel(1)
                  body("boat")\currentAngularVelocity = body("car")\currentAngularVelocity ;tmp_torque
                  body("boat prop")\currentPositionX = body("boat")\currentPositionX
                  body("boat prop")\currentPositionY = body("boat")\currentPositionY
 
                  b2World_CreateBodyAndFixtures("boat")
                  b2World_CreateBodyAndFixturesAndJoints("boat prop")
 
                  player_main_body_name = "boat"
                  player_spinning_body_name = "boat prop"
              EndSelect
          EndSelect
        EndIf
 
        If GetAsyncKeyState_(#VK_A)
 
          b2Body_GetPosition(body(player_main_body_name)\ptr, tmp_pos())
          b2Body_ApplyForce(body(player_main_body_name)\ptr, body_mass * -body_user_applied_linear_force, 0, tmp_pos(0), tmp_pos(1), 1)
        EndIf
 
        If GetAsyncKeyState_(#VK_D)
 
          b2Body_GetPosition(body(player_main_body_name)\ptr, tmp_pos())
          b2Body_ApplyForce(body(player_main_body_name)\ptr, body_mass * body_user_applied_linear_force, 0, tmp_pos(0), tmp_pos(1), 1)
        EndIf
 
        If GetAsyncKeyState_(#VK_W)
 
          b2Body_GetPosition(body(player_main_body_name)\ptr, tmp_pos())
          b2Body_ApplyForce(body(player_main_body_name)\ptr, 0, body_mass * body_user_applied_linear_force, tmp_pos(0), tmp_pos(1), 1)
        EndIf
 
        If GetAsyncKeyState_(#VK_S)
 
          b2Body_GetPosition(body(player_main_body_name)\ptr, tmp_pos())
          b2Body_ApplyForce(body(player_main_body_name)\ptr, 0, body_mass * -body_user_applied_linear_force, tmp_pos(0), tmp_pos(1), 1)
        EndIf
 
        If GetAsyncKeyState_(#VK_Q)
 
          If player_main_body_name = "car"
 
            player_spinning_body_name = "wheel1"
          EndIf
 
          tmp_velocity.d = b2Body_GetAngularVelocity(body(player_spinning_body_name)\ptr)
 
          If tmp_velocity < 30
 
            tmp_velocity = tmp_velocity + Radian(300)
          EndIf
 
          b2Body_SetAngularVelocity(body(player_spinning_body_name)\ptr, tmp_velocity)
        EndIf
 
        If GetAsyncKeyState_(#VK_E)
 
          If player_main_body_name = "car"
 
            player_spinning_body_name = "wheel2"
          EndIf
 
          tmp_velocity.d = b2Body_GetAngularVelocity(body(player_spinning_body_name)\ptr)
 
          If tmp_velocity > -30
 
            tmp_velocity = tmp_velocity - Radian(300)
          EndIf
 
          b2Body_SetAngularVelocity(body(player_spinning_body_name)\ptr, tmp_velocity)
        EndIf
 
        If GetAsyncKeyState_(#VK_F)
 
          b2Body_SetMassData(body(player_main_body_name)\ptr, body_mass - 1.0, 0, 0, 0)
        EndIf
 
        If GetAsyncKeyState_(#VK_G)
 
          b2Body_SetMassData(body(player_main_body_name)\ptr, body_mass + 1.0, 0, 0, 0)
        EndIf
 
        ; particle menu (keyboard)
      Case #particle_menu
 
        If key_event > -1
 
          Select key_event
 
            Case #PB_Shortcut_K
 
              b2World_DestroyParticleGroups()
              b2World_DestroyParticleSystems()
 
              ; I read in the LiquidFun docs that the particle groups aren't destroyed until the next Step.  So Step below...
              ;              b2World_Step(world\ptr, (1 / 60.0), 6, 2)
 
              b2World_CreateParticleSystems()
              b2World_CreateParticleGroups()
 
 
            Case #PB_Shortcut_Q
 
              particle_group(curr_particle_system_name)\radius = particle_group(curr_particle_system_name)\radius - 0.5
 
              ; Destroy the Particle Groups
              b2World_DestroyParticleGroups()
 
              ; I read in the LiquidFun docs that the particle groups aren't destroyed until the next Step.  So Step below...
              b2World_Step(world\ptr, (1 / 60.0), 6, 2)
 
              ; Create the Particle Groups
              b2World_CreateParticleGroups()
 
            Case #PB_Shortcut_E
 
              particle_group(curr_particle_system_name)\radius = particle_group(curr_particle_system_name)\radius + 0.5
 
              ; Destroy the Particle Groups
              b2World_DestroyParticleGroups()
 
              ; I read in the LiquidFun docs that the particle groups aren't destroyed until the next Step.  So Step below...
              b2World_Step(world\ptr, (1 / 60.0), 6, 2)
 
              ; Create the Particle Groups
              b2World_CreateParticleGroups()
 
            Case #PB_Shortcut_Y
 
              If particle_system(curr_particle_system_name)\particle_blending = 0
 
                particle_system(curr_particle_system_name)\particle_blending = 1
              Else
 
                particle_system(curr_particle_system_name)\particle_blending = 0
              EndIf
 
            Case #PB_Shortcut_U
 
              particle_system(curr_particle_system_name)\particle_size = particle_system(curr_particle_system_name)\particle_size - 0.05
 
              If particle_system(curr_particle_system_name)\particle_size < 0.05
 
                particle_system(curr_particle_system_name)\particle_size = 0.05
              EndIf
 
            Case #PB_Shortcut_I
 
              particle_system(curr_particle_system_name)\particle_size = particle_system(curr_particle_system_name)\particle_size + 0.05
 
            Case #PB_Shortcut_X
 
              b2ParticleGroup_DestroyParticles(particle_group(curr_particle_system_name)\particle_group_ptr, 0)
              b2World_DestroyParticleSystem(world\ptr, particle_system(curr_particle_system_name)\particle_system_ptr)
 
              ; I read in the LiquidFun docs that the particle groups aren't destroyed until the next Step.  So Step below...
              b2World_Step(world\ptr, (1 / 60.0), 6, 2)
 
              particle_group(curr_particle_system_name)\active = 0
              particle_system(curr_particle_system_name)\active = 0
 
              Select curr_particle_system_name
 
                Case "water"
 
                  curr_particle_system_name = "elastic"
 
                Case "elastic"
 
                  curr_particle_system_name = "spring"
 
                Case "spring"
 
                  curr_particle_system_name = "viscous"
 
                Case "viscous"
 
                  curr_particle_system_name = "powder"
 
                Case "powder"
 
                  curr_particle_system_name = "tensile"
 
                Case "tensile"
 
                  curr_particle_system_name = "barrier"
 
                Case "barrier"
 
                  curr_particle_system_name = "blank"
 
                Case "blank"
 
                  curr_particle_system_name = "water"
              EndSelect
 
              particle_system(curr_particle_system_name)\active = 1
              particle_group(curr_particle_system_name)\active = 1
              b2World_CreateParticleSystemEx(curr_particle_system_name)
              b2World_CreateParticleGroupEx(curr_particle_system_name)
          EndSelect
        EndIf        
 
        ; editing menu
      Case #edit_menu
 
        If key_event > -1
 
          Select key_event
 
            Case #PB_Shortcut_T
 
              If texture_drawing_mode = 0
 
                texture_drawing_mode = 1
                ;        tmp_quad(0)\x = (world\mouseCurrentPositionX - 400) * 0.171
                ;        tmp_quad(0)\y = (300 - world\mouseCurrentPositionY) * 0.171
 
                tmp_quad(0)\x = ((world\mouseCurrentPositionX - 400) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionX
                tmp_quad(0)\y = ((300 - world\mouseCurrentPositionY) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionY
 
              EndIf
 
              If texture_drawing_mode = 3
 
                texture_drawing_mode = 0
              EndIf
 
              If texture_drawing_mode = 2
 
                texture_drawing_mode = 3
              EndIf
 
            Case #PB_Shortcut_6
 
              If fixture_drawing_mode = 0
 
                fixture_drawing_mode = 1
                tmp_fixture_vector_num = 0
 
                tmp_fixture_vector(tmp_fixture_vector_num)\x = ((world\mouseCurrentPositionX - 400) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionX
                tmp_fixture_vector(tmp_fixture_vector_num)\y = ((300 - world\mouseCurrentPositionY) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionY
              EndIf
 
              tmp_fixture_vector_num = tmp_fixture_vector_num + 1
          EndSelect    
        EndIf
 
 
    EndSelect
 
 
    ; ==============
    ; Mouse handling
    ; ==============
 
    If mouse_event > -1
 
      Select mouse_event
 
        Case #PB_EventType_MouseMove
 
 
          previous_mouse_position_x.d = world\mouseCurrentPositionX
          previous_mouse_position_y.d = world\mouseCurrentPositionY
          world\mouseCurrentPositionX = GetGadgetAttribute(0, #PB_OpenGL_MouseX)
          world\mouseCurrentPositionY = GetGadgetAttribute(0, #PB_OpenGL_MouseY)
          world\mouseDisplacementPositionX = previous_mouse_position_x - world\mouseCurrentPositionX
          world\mouseDisplacementPositionY = previous_mouse_position_y - world\mouseCurrentPositionY
 
          If texture_drawing_mode = 1
 
            texture_drawing_mode = 2
          EndIf
 
          If texture_drawing_mode = 2
 
            tmp_quad(1)\x = ((world\mouseCurrentPositionX - 400) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionX
            tmp_quad(1)\y = ((300 - world\mouseCurrentPositionY) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionY
          EndIf
 
          If fixture_drawing_mode = 1
 
            tmp_fixture_vector(tmp_fixture_vector_num)\x = ((world\mouseCurrentPositionX - 400) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionX
            tmp_fixture_vector(tmp_fixture_vector_num)\y = ((300 - world\mouseCurrentPositionY) * (0.17 - (world\mainCameraPositionZ / 1250))) - world\mainCameraPositionY
 
            ; note below is radians
            ;      tmp_fixture_angle(tmp_fixture_vector_num) = ATan2(tmp_fixture_vector(tmp_fixture_vector_num - 1)\y - tmp_fixture_vector(tmp_fixture_vector_num)\y, tmp_fixture_vector(tmp_fixture_vector_num - 1)\x - tmp_fixture_vector(tmp_fixture_vector_num)\x)
          EndIf
 
        Case #PB_EventType_LeftButtonDown
 
          world\mouseLeftButtonPressed = 1
 
        Case #PB_EventType_LeftButtonUp
 
          world\mouseLeftButtonPressed = 0
 
        Case #PB_EventType_RightButtonUp
 
 
          ;     texture_drawing_mode = 0
          fixture_drawing_mode = 0
          tmp_fixture_vector_size = tmp_fixture_vector_num + 1
 
          ; move the fixture / shape to the centroid (center of rotation) of 0,0
          centroid.b2Vec2
          b2PolygonShape_MoveToZeroCentroid(@tmp_fixture_vector(0)\x, tmp_fixture_vector_size, @centroid\x)
 
          clipboard_str.s = "\" + Chr(34) + "["
 
          For tmp_fixture_vector_num = 0 To (tmp_fixture_vector_size - 1)
 
            If tmp_fixture_vector_num > 0
 
              clipboard_str = clipboard_str + ", "
            EndIf
 
            clipboard_str = clipboard_str + StrF(tmp_fixture_vector(tmp_fixture_vector_num)\x, 2) + ", " + StrF(tmp_fixture_vector(tmp_fixture_vector_num)\y, 2)
          Next
 
          clipboard_str = clipboard_str + "]\" +  Chr(34) + ", " + StrF(tmp_quad(1)\x - tmp_quad(0)\x, 2)
 
          ;     b2PolygonShape_ComputeCentroid(@tmp_fixture_vector(0)\x, tmp_fixture_vector_size, @centroid\x)
          ;    clipboard_str = clipboard_str + " --- " + StrF(centroid\x, 2) + ", " + StrF(centroid\y, 2)
 
          ;    is_convex_and_clockwise = b2Vec2Array_IsConvexAndClockwise(@tmp_fixture_vector(0)\x, tmp_fixture_vector_num + 1)
 
          SetClipboardText(clipboard_str)
 
          ;   draw_world_end_position\x = 999999
          ;   draw_world_end_position\y = 999999
          tmp_fixture_vector_num = -1
 
        Case #PB_EventType_MouseWheel
 
          world\mouseWheelPosition = GetGadgetAttribute(0, #PB_OpenGL_WheelDelta)
 
      EndSelect
    EndIf
 
    ; =======================
    ; Animate the main camera
    ; =======================
 
    If world\mouseWheelPosition > 0  
 
      world\mouseWheelPosition = 0
 
      If world\mainCameraPositionZ >= (1 + 10)
 
        world\mainCameraDisplacementPositionZ = world\mainCameraDisplacementPositionZ + 10
        world\mainCameraPositionZ = world\mainCameraPositionZ - 10
      EndIf
    EndIf
 
    If world\mouseWheelPosition < 0  
 
      world\mouseWheelPosition = 0
 
      If world\mainCameraPositionZ <= (1000 - 10)
 
        world\mainCameraDisplacementPositionZ = world\mainCameraDisplacementPositionZ - 10
        world\mainCameraPositionZ = world\mainCameraPositionZ + 10
      EndIf
    EndIf
 
    If player_tracking = 0
 
      If world\mouseLeftButtonPressed = 1
 
        If world\mousePreviousPositionX = -99999
 
          world\mousePreviousPositionX = world\mouseCurrentPositionX
        EndIf
 
        If world\mousePreviousPositionY = -99999
 
          world\mousePreviousPositionY = world\mouseCurrentPositionY
        EndIf
 
        world\mainCameraDisplacementPositionX = world\mainCameraDisplacementPositionX + ((world\mouseCurrentPositionX - world\mousePreviousPositionX) * (world\mainCameraPositionZ / 1125))
        world\mainCameraDisplacementPositionY = world\mainCameraDisplacementPositionY - ((world\mouseCurrentPositionY - world\mousePreviousPositionY) * (world\mainCameraPositionZ / 1125))
        world\mousePreviousPositionX = world\mouseCurrentPositionX
        world\mousePreviousPositionY = world\mouseCurrentPositionY
      Else
 
        world\mousePreviousPositionX = -99999
        world\mousePreviousPositionY = -99999
      EndIf
    EndIf
 
 
    ; Apply Camera Movement
 
    If player_tracking = 0
 
      glTranslatef_(world\mainCameraDisplacementPositionX, world\mainCameraDisplacementPositionY, world\mainCameraDisplacementPositionZ)
    Else
 
      ; unrotate world first
      ;      glRotatef_(Degree(player_tracking_angle), 0, 0, 1)
 
      ; move the camera a vector that's equivalent to the velocity step of the player
      ; so the player always appears in the center of the window
      b2World_FollowBody(player_main_body_name)
 
      ; rotate the world back to where it was
      ;      glRotatef_(-Degree(player_tracking_angle), 0, 0, 1)
 
      ; rotate the camera
      ;      tmp_body_angle_offset.d = b2Body_GetAngularVelocity(body(player_main_body_name)\ptr)
      ;      tmp_body_angle_offset = tmp_body_angle_offset * 0.0167
      ;      glRotatef_(-Degree(tmp_body_angle_offset), 0, 0, 1)
      ;      player_tracking_angle = player_tracking_angle - tmp_body_angle_offset
    EndIf
 
    world\mainCameraPositionX = world\mainCameraPositionX - world\mainCameraDisplacementPositionX
    world\mainCameraPositionY = world\mainCameraPositionY - world\mainCameraDisplacementPositionY
    world\mainCameraDisplacementPositionX=0
    world\mainCameraDisplacementPositionY=0
    world\mainCameraDisplacementPositionZ=0
 
 
 
 
    ; =================
    ; Animate the World
    ; =================
 
    ; Step the Box2D World
    b2World_Step(world\ptr, (animation_speed / 60.0), 6, 2)
 
    ; Clear the OpenGLGadget
    glColor3f_(1.0, 1.0, 1.0)
    ;    glClearColor_(1, 1, 1, 1)
    glClearColor_(0.7, 0.7, 0.7, 1)
    glClear_ (#GL_COLOR_BUFFER_BIT | #GL_DEPTH_BUFFER_BIT)
 
    ; Draw the LiquidFun Particles (texture, particle_quad_size)
    glDraw_Particles()
 
    ; Draw the Box2D Bodies (body, fixture, texture)
    glDraw_Fixtures()
 
 
 
 
    ; Draw the drawing line
    If texture_drawing_mode = 2 Or texture_drawing_mode = 3
 
      ;   Debug(@tmp_fixture_vector(0)\x)
 
      ;    is_convex_and_clockwise = b2Vec2Array_IsConvexAndClockwise(@tmp_fixture_vector(0)\x, tmp_fixture_vector_num + 1)
 
      ;    If is_convex_and_clockwise <> 1
 
      ;     Debug("aaa")
      ;  EndIf
      ;    Debug(Str(is_convex_and_clockwise) + " " + Str(__clockwise))
 
      drawing_red.f = 1.0
      drawing_green.f = 0.0
      drawing_blue.f = 0.0
 
      ;   If is_convex_and_clockwise = 1
 
      ;     drawing_red = 0.0
      ;     drawing_green = 1.0
      ;   EndIf
 
      glEnable_(#GL_TEXTURE_2D)
 
      glTexImage2D_(#GL_TEXTURE_2D, 0, #GL_RGBA, ImageWidth(texture("speed boat")\image_number), ImageHeight(texture("speed boat")\image_number), 0, #GL_BGRA_EXT, #GL_UNSIGNED_BYTE, texture("speed boat")\image_bitmap\bmBits)
 
      ;50, 10, -50, 10, -50, -10, 50, -10
      Dim tmp_quad_vertice.Vec3f(4)
      Dim tmp_texture_vertice.b2Vec2(4)
 
      tmp_texture_vertice(0)\x = 0.0
      tmp_texture_vertice(0)\y = 1.0
      tmp_quad_vertice(0)\x = tmp_quad(0)\x
      tmp_quad_vertice(0)\y = tmp_quad(0)\y
      tmp_quad_vertice(0)\z = 0.5
 
      tmp_texture_vertice(1)\x = 0.0
      tmp_texture_vertice(1)\y = 0.0
      tmp_quad_vertice(1)\x = tmp_quad(0)\x
      tmp_quad_vertice(1)\y = tmp_quad(0)\y - (tmp_quad(1)\x - tmp_quad(0)\x)
      tmp_quad_vertice(1)\z = 0.5
 
      tmp_texture_vertice(2)\x = 1.0
      tmp_texture_vertice(2)\y = 0.0
      tmp_quad_vertice(2)\x = tmp_quad(1)\x
      tmp_quad_vertice(2)\y = tmp_quad(0)\y - (tmp_quad(1)\x - tmp_quad(0)\x)
      tmp_quad_vertice(2)\z = 0.5
 
      tmp_texture_vertice(3)\x = 1.0
      tmp_texture_vertice(3)\y = 1.0
      tmp_quad_vertice(3)\x = tmp_quad(1)\x
      tmp_quad_vertice(3)\y = tmp_quad(0)\y
      tmp_quad_vertice(3)\z = 0.5
 
      glEnableClientState_(#GL_VERTEX_ARRAY )
      glEnableClientState_ (#GL_TEXTURE_COORD_ARRAY_EXT); 
      glVertexPointer_( 3, #GL_FLOAT, SizeOf(Vec3f), @tmp_quad_vertice(0)\x )
      glTexCoordPointer_(2, #GL_FLOAT, SizeOf(b2Vec2), @tmp_texture_vertice(0)\x)
      glDrawArrays_( #GL_QUADS, 0, ArraySize(tmp_quad_vertice()) )
      glDisableClientState_( #GL_TEXTURE_COORD_ARRAY_EXT )
      glDisableClientState_( #GL_VERTEX_ARRAY )
 
      ; disable texture mapping
      glBindTexture_(#GL_TEXTURE_2D, 0)
      glDisable_( #GL_TEXTURE_2D );
    EndIf
 
 
 
 
 
    If fixture_drawing_mode = 1
 
 
      glLineWidth_(2.5)
      glColor3f_(1.0, 0.0, 0.0)
 
 
      If tmp_fixture_vector_num > 1
 
        glBegin_(#GL_POLYGON)
      Else
 
        glBegin_(#GL_LINE_STRIP)
      EndIf
 
      ; glBegin_(#GL_QUADS)
 
      For i = 0 To tmp_fixture_vector_num
        ;  Debug(i)
 
        glVertex3f_(tmp_fixture_vector(i)\x, tmp_fixture_vector(i)\y, 0.0)
        ;        glVertex3f_(tmp_quad(0)\x, tmp_quad(0)\y, 0.0)
        ;        glVertex3f_(tmp_quad(0)\x, tmp_quad(0)\y - (tmp_quad(1)\x - tmp_quad(0)\x), 0.0)
        ;        glVertex3f_(tmp_quad(1)\x, tmp_quad(0)\y - (tmp_quad(1)\x - tmp_quad(0)\x), 0.0)
        ;        glVertex3f_(tmp_quad(1)\x, tmp_quad(0)\y, 0.0)
      Next
 
      glEnd_()
    EndIf    
 
 
 
 
 
 
 
    ; Update the display
    SetGadgetAttribute(Gadget, #PB_OpenGL_FlipBuffers, #True)
 
    b2Body_SetAngularVelocityPercent(body("ground")\ptr, 99)
 
    body_mass.d = b2Body_GetMass(body(player_main_body_name)\ptr)
    b2Body_GetLinearVelocityEx(player_main_body_name)
 
    num_frames = num_frames + 1
  EndIf
 
  ; =======================================
  ; Update the info window (every 1 second)
  ; =======================================
 
  If (ElapsedMilliseconds() - fps_timer) > 1000
 
    fps_timer = ElapsedMilliseconds()
    CreateThread(@text_window_handler(), 1000)
  EndIf  
 
 
Until Eventxx = #PB_Event_CloseWindow Or end_game = 1
 
 
 
 
; #FUNCTION# ====================================================================================================================
; Name...........: text_window_handler
; Description ...: Handles keyboard and mouse events
; Syntax.........: text_window_handler()
; Parameters ....:
; Return values .: None
; Author ........: Sean Griffin
; Modified.......:
; Remarks .......:
; Related .......: 
; Link ..........:
; Example .......:
; ===============================================================================================================================
Procedure text_window_handler(*Value)
 
  fps = num_frames + 1
  num_frames = 0
 
  opengl_info.s = "OpenGL: Ver=" + sgGlVersion
  camera_info.s = "Camera: Pos=" + StrF(world\mainCameraPositionX, 2) + " m x " + StrF(world\mainCameraPositionY, 2) + " m x " + StrF(world\mainCameraPositionZ, 2) + " m"
  mouse_info.s = "Mouse: Gadget Pos=" + StrF(world\mouseCurrentPositionX, 2) + " p x " + StrF(world\mouseCurrentPositionY, 2) + " p; World Pos=" + StrF(world\mainCameraPositionX + ((400 - world\mouseCurrentPositionX) * (world\mainCameraPositionZ / 1125)), 2) + " m x " + StrF(world\mainCameraPositionY + 1.1 + ((300 - world\mouseCurrentPositionY) * (world\mainCameraPositionZ / 1125)), 2) + " m"
  animation_info.s = "Animation: Rate=" + Str(fps) + " fps"
 
 
  Select menu_type
 
    Case #main_menu
 
      msg.s = "Main Menu" + Chr(10) +
              "------------------" + Chr(10) +
              "Keys & Mouse" + Chr(10) +
              "-----------------------" + Chr(10) +
              "Esc: Quits this demo" + Chr(10) +
              "2: Player menu" + Chr(10) +
              "3: Particle menu" + Chr(10) +
              "4: Editing menu" + Chr(10) +
              "R: Restarts the scene" + Chr(10) +
              "Left Mouse Button & Drag: Pans the camera" + Chr(10) +
              "Mouse Wheel: Zooms the camera in & out" + Chr(10) +
              "Q, E: Adds torque to the platform" + Chr(10) +
              "B: Toggles the Bucket" + Chr(10) +
              "O: Toggles the outlining of all Box2D bodies" + Chr(10) +
              "F: Toggles the 60 frames per second limit" + Chr(10) +
              "-------" + Chr(10) +
              "Info" + Chr(10) +
              "-------" + Chr(10) +
              opengl_info + Chr(10) + 
              camera_info + Chr(10) + 
              mouse_info + Chr(10) +
              animation_info
 
    Case #player_menu
 
      msg.s = "Player Menu" + Chr(10) +
              "------------------" + Chr(10) +
              "Keys & Mouse" + Chr(10) +
              "-----------------------" + Chr(10) +
              "Esc: Quits this demo" + Chr(10) +
              "1: Main menu" + Chr(10) +
              "3: Particle menu" + Chr(10) +
              "4: Editing menu" + Chr(10) +
              "R: Restarts the scene" + Chr(10) +
              "Left Mouse Button & Drag: Pans the camera" + Chr(10) +
              "Mouse Wheel: Zooms the camera in & out" + Chr(10) +
              "Q, E: Adds torque to the motor of the player" + Chr(10) +
              "A, D, S, W: Adds Linear Force to the player" + Chr(10) +
              "F, G: Changes the Mass of the player" + Chr(10) +
              "T: Toggles the Tracking of the player" + Chr(10) +
              "X: Changes the Vehicle of the player" + Chr(10) +
              "-------" + Chr(10) +
              "Info" + Chr(10) +
              "-------" + Chr(10) +
              opengl_info + Chr(10) + 
              camera_info + Chr(10) + 
              mouse_info + Chr(10) +
              "Player: Mass=" + StrF(body_mass, 2) + " kg; Linear Velocity=" + StrF(b2Vec2_LinearVelocity(body(player_main_body_name)\currentLinearVelocityX, body(player_main_body_name)\currentLinearVelocityY), 2) + " m/s; Angular Velocity=" +StrF(b2Body_GetAngularVelocity(body(player_main_body_name)\ptr), 2) + " m/s" + Chr(10) + 
              animation_info
 
    Case #particle_menu
 
      msg.s = "Particle Menu" + Chr(10) +
              "------------------" + Chr(10) +
              "Keys & Mouse" + Chr(10) +
              "-----------------------" + Chr(10) +
              "Esc: Quits this demo" + Chr(10) +
              "1: Main menu" + Chr(10) +
              "2: Player menu" + Chr(10) +
              "4: Editing menu" + Chr(10) +
              "R: Restarts the scene" + Chr(10) +
              "Left Mouse Button & Drag: Pans the camera" + Chr(10) +
              "Mouse Wheel: Zooms the camera in & out" + Chr(10) +
              "Q, E: Changes the starting radius of the water group" + Chr(10) +
              "Y: Toggles water particle texture blending" + Chr(10) +
              "U, I: Changes the water particle size" + Chr(10) +
              "X: Changes the particle system name / type" + Chr(10) +
              "K: Restarts the water group" + Chr(10) +
              "-------" + Chr(10) +
              "Info" + Chr(10) +
              "-------" + Chr(10) +
              opengl_info + Chr(10) + 
              camera_info + Chr(10) + 
              mouse_info + Chr(10) +
              "Particle System: Name=" + curr_particle_system_name + "; Number of Particles=" + Str(particle_system(curr_particle_system_name)\particle_count) + Chr(10) + 
              "Particle Group: Starting Pos=" + Str(water_position_x) + "," + Str(water_position_y) + "; Strength=" + Str(water_strength) + "; Stride=" + Str(water_stride) + "; Radius=" + StrF(particle_group(curr_particle_system_name)\radius, 2) + Chr(10) + 
              "Particle: Size=" + StrF(particle_system(curr_particle_system_name)\particle_size, 2) + "; Blending=" + Str(particle_system(curr_particle_system_name)\particle_blending) + Chr(10) + 
              animation_info
 
    Case #edit_menu
 
      msg.s = "Editing Menu" + Chr(10) +
              "------------------" + Chr(10) +
              "Keys & Mouse" + Chr(10) +
              "-----------------------" + Chr(10) +
              "Esc: Quits this demo" + Chr(10) +
              "1: Main menu" + Chr(10) +
              "2: Player menu" + Chr(10) +
              "3: Particle menu" + Chr(10) +
              "R: Restarts the scene" + Chr(10) +
              "Left Mouse Button & Drag: Pans the camera" + Chr(10) +
              "Mouse Wheel: Zooms the camera in & out" + Chr(10) +
              "T: Toggles sprite image drawing (experimental)" + Chr(10) +
              "6: Toggles CCW convex polygon shape drawing (experimental)" + Chr(10) +
              "-------" + Chr(10) +
              "Info" + Chr(10) +
              "-------" + Chr(10) +
              opengl_info + Chr(10) + 
              camera_info + Chr(10) + 
              mouse_info + Chr(10) +
              animation_info
 
  EndSelect
 
  SetGadgetText(5, msg)
 
EndProcedure