-
-
Notifications
You must be signed in to change notification settings - Fork 31
/
p_enemy.c
1974 lines (1615 loc) · 49.6 KB
/
p_enemy.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
/**\file
*\section License
* License: GPL
* Online License Link: http://www.gnu.org/licenses/gpl.html
*
*\author Copyright © 2003-2009 Jaakko Keränen <jaakko.keranen@iki.fi>
*\author Copyright © 2005-2009 Daniel Swanson <danij@dengine.net>
*\author Copyright © 1999 by Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman (PrBoom 2.2.6)
*\author Copyright © 1999-2000 by Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze (PrBoom 2.2.6)
*\author Copyright © 1993-1996 by id Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* p_enemy.c: Enemy thinking, AI (jDoom-specific).
*
* Action Pointer Functions that are associated with states/frames.
*/
// HEADER FILES ------------------------------------------------------------
#include <math.h>
#ifdef MSVC
# pragma optimize("g", off)
#endif
#include "jdoom.h"
#include "dmu_lib.h"
#include "p_map.h"
#include "p_mapspec.h"
#include "p_door.h"
#include "p_floor.h"
// MACROS ------------------------------------------------------------------
#define FATSPREAD (ANG90/8)
#define SKULLSPEED (20)
#define TRACEANGLE (0xc000000)
// TYPES -------------------------------------------------------------------
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
// PUBLIC DATA DEFINITIONS -------------------------------------------------
boolean bossKilled;
mobj_t **brainTargets;
int numBrainTargets;
int numBrainTargetsAlloc;
braindata_t brain; // Global state of boss brain.
// PRIVATE DATA DEFINITIONS ------------------------------------------------
static mobj_t *corpseHit;
static mobj_t *vileObj;
static float vileTry[3];
static float dropoffDelta[2], floorZ;
// Eight directional movement speeds.
#define MOVESPEED_DIAGONAL (0.71716309f)
static const float dirSpeed[8][2] =
{
{1, 0},
{MOVESPEED_DIAGONAL, MOVESPEED_DIAGONAL},
{0, 1},
{-MOVESPEED_DIAGONAL, MOVESPEED_DIAGONAL},
{-1, 0},
{-MOVESPEED_DIAGONAL, -MOVESPEED_DIAGONAL},
{0, -1},
{MOVESPEED_DIAGONAL, -MOVESPEED_DIAGONAL}
};
#undef MOVESPEED_DIAGONAL
// CODE --------------------------------------------------------------------
/**
* If a monster yells at a player, it will alert other monsters to the
* player's whereabouts.
*/
void P_NoiseAlert(mobj_t *target, mobj_t *emitter)
{
VALIDCOUNT++;
P_RecursiveSound(target, P_GetPtrp(emitter->subsector, DMU_SECTOR), 0);
}
static boolean checkMeleeRange(mobj_t *actor)
{
mobj_t *pl;
float dist, range;
if(!actor->target)
return false;
pl = actor->target;
dist = P_ApproxDistance(pl->pos[VX] - actor->pos[VX],
pl->pos[VY] - actor->pos[VY]);
if(!cfg.netNoMaxZMonsterMeleeAttack)
{ // Account for Z height difference.
if(pl->pos[VZ] > actor->pos[VZ] + actor->height ||
pl->pos[VZ] + pl->height < actor->pos[VZ])
return false;
}
range = MELEERANGE - 20 + pl->info->radius;
if(dist >= range)
return false;
if(!P_CheckSight(actor, actor->target))
return false;
return true;
}
static boolean checkMissileRange(mobj_t *actor)
{
float dist;
if(!P_CheckSight(actor, actor->target))
return false;
if(actor->flags & MF_JUSTHIT)
{
// The target just hit the enemy, so fight back!
actor->flags &= ~MF_JUSTHIT;
return true;
}
if(actor->reactionTime)
return false; // Do not attack yet.
dist =
P_ApproxDistance(actor->pos[VX] - actor->target->pos[VX],
actor->pos[VY] - actor->target->pos[VY]) - 64;
if(P_GetState(actor->type, SN_MELEE) == S_NULL)
dist -= 128; // No melee attack, so fire more.
if(actor->type == MT_VILE)
{
if(dist > 14 * 64)
return false; // Too far away.
}
if(actor->type == MT_UNDEAD)
{
if(dist < 196)
return false; // Close for fist attack.
dist /= 2;
}
if(actor->type == MT_CYBORG || actor->type == MT_SPIDER ||
actor->type == MT_SKULL)
{
dist /= 2;
}
if(dist > 200)
dist = 200;
if(actor->type == MT_CYBORG && dist > 160)
dist = 160;
if((float) P_Random() < dist)
return false;
return true;
}
/**
* Move in the current direction if not blocked.
*
* @return @c false, if the move is blocked.
*/
static boolean moveMobj(mobj_t *actor, boolean dropoff)
{
float pos[3], step[3];
linedef_t *ld;
boolean good;
if(actor->moveDir == DI_NODIR)
return false;
if((unsigned) actor->moveDir >= DI_NODIR)
Con_Error("Weird actor->moveDir!");
step[VX] = actor->info->speed * dirSpeed[actor->moveDir][MX];
step[VY] = actor->info->speed * dirSpeed[actor->moveDir][MY];
pos[VX] = actor->pos[VX] + step[VX];
pos[VY] = actor->pos[VY] + step[VY];
// $dropoff_fix
if(!P_TryMove(actor, pos[VX], pos[VY], dropoff, false))
{
// Open any specials.
if((actor->flags & MF_FLOAT) && floatOk)
{
// Must adjust height.
if(actor->pos[VZ] < tmFloorZ)
actor->pos[VZ] += FLOATSPEED;
else
actor->pos[VZ] -= FLOATSPEED;
actor->flags |= MF_INFLOAT;
return true;
}
if(!P_IterListSize(spechit))
return false;
actor->moveDir = DI_NODIR;
good = false;
while((ld = P_PopIterList(spechit)) != NULL)
{
/**
* If the special is not a door that can be opened, return false.
*
* $unstuck: This is what caused monsters to get stuck in
* doortracks, because it thought that the monster freed itself
* by opening a door, even if it was moving towards the
* doortrack, and not the door itself.
*
* If a line blocking the monster is activated, return true 90%
* of the time. If a line blocking the monster is not activated,
* but some other line is, return false 90% of the time.
* A bit of randomness is needed to ensure it's free from
* lockups, but for most cases, it returns the correct result.
*
* Do NOT simply return false 1/4th of the time (causes monsters
* to back out when they shouldn't, and creates secondary
* stickiness).
*/
if(P_ActivateLine(ld, actor, 0, SPAC_USE))
good |= ld == blockLine ? 1 : 2;
}
if(!good || cfg.monstersStuckInDoors)
return good;
else
return (P_Random() >= 230) || (good & 1);
}
else
{
P_MobjSetSRVO(actor, step[VX], step[VY]);
actor->flags &= ~MF_INFLOAT;
}
// $dropoff_fix: fall more slowly, under gravity, if fellDown==true
if(!(actor->flags & MF_FLOAT) && !fellDown)
{
if(actor->pos[VZ] > actor->floorZ)
P_HitFloor(actor);
actor->pos[VZ] = actor->floorZ;
}
return true;
}
/**
* Attempts to move actor on in its current (ob->moveangle) direction.
* If blocked by either a wall or an actor returns FALSE
* If move is either clear or blocked only by a door, returns TRUE and sets...
* If a door is in the way, an OpenDoor call is made to start it opening.
*/
static boolean tryMoveMobj(mobj_t *actor)
{
// $dropoff_fix
if(!moveMobj(actor, false))
{
return false;
}
actor->moveCount = P_Random() & 15;
return true;
}
static void doNewChaseDir(mobj_t *actor, float deltaX, float deltaY)
{
dirtype_t xdir, ydir, tdir;
dirtype_t olddir = actor->moveDir;
dirtype_t turnaround = olddir;
if(turnaround != DI_NODIR) // Find reverse direction.
turnaround ^= 4;
xdir = (deltaX > 10 ? DI_EAST : deltaX < -10 ? DI_WEST : DI_NODIR);
ydir = (deltaY < -10 ? DI_SOUTH : deltaY > 10 ? DI_NORTH : DI_NODIR);
// Try direct route.
if(xdir != DI_NODIR && ydir != DI_NODIR &&
turnaround != (actor->moveDir =
deltaY < 0 ? deltaX >
0 ? DI_SOUTHEAST : DI_SOUTHWEST : deltaX >
0 ? DI_NORTHEAST : DI_NORTHWEST) && tryMoveMobj(actor))
return;
// Try other directions.
if(P_Random() > 200 || fabs(deltaY) > fabs(deltaX))
{
dirtype_t temp = xdir;
xdir = ydir;
ydir = temp;
}
if((xdir == turnaround ? xdir = DI_NODIR : xdir) != DI_NODIR &&
(actor->moveDir = xdir, tryMoveMobj(actor)))
return; // Either moved forward or attacked.
if((ydir == turnaround ? ydir = DI_NODIR : ydir) != DI_NODIR &&
(actor->moveDir = ydir, tryMoveMobj(actor)))
return;
// There is no direct path to the player, so pick another direction.
if(olddir != DI_NODIR && (actor->moveDir = olddir, tryMoveMobj(actor)))
return;
// Randomly determine direction of search.
if(P_Random() & 1)
{
for(tdir = DI_EAST; tdir <= DI_SOUTHEAST; tdir++)
if(tdir != turnaround &&
(actor->moveDir = tdir, tryMoveMobj(actor)))
return;
}
else
{
for(tdir = DI_SOUTHEAST; tdir != DI_EAST - 1; tdir--)
if(tdir != turnaround &&
(actor->moveDir = tdir, tryMoveMobj(actor)))
return;
}
if((actor->moveDir = turnaround) != DI_NODIR && !tryMoveMobj(actor))
actor->moveDir = DI_NODIR;
}
/**
* Monsters try to move away from tall dropoffs.
*
* In Doom, they were never allowed to hang over dropoffs, and would remain
* stuck if involuntarily forced over one. This logic, combined with
* p_map.c::P_TryMove(), allows monsters to free themselves without making
* them tend to hang over dropoffs.
*/
static boolean PIT_AvoidDropoff(linedef_t* line, void* data)
{
sector_t* backsector = P_GetPtrp(line, DMU_BACK_SECTOR);
float* bbox = P_GetPtrp(line, DMU_BOUNDING_BOX);
if(backsector &&
tmBBox[BOXRIGHT] > bbox[BOXLEFT] &&
tmBBox[BOXLEFT] < bbox[BOXRIGHT] &&
tmBBox[BOXTOP] > bbox[BOXBOTTOM] && // Linedef must be contacted
tmBBox[BOXBOTTOM] < bbox[BOXTOP] &&
P_BoxOnLineSide(tmBBox, line) == -1)
{
sector_t* frontsector = P_GetPtrp(line, DMU_FRONT_SECTOR);
float front = P_GetFloatp(frontsector, DMU_FLOOR_HEIGHT);
float back = P_GetFloatp(backsector, DMU_FLOOR_HEIGHT);
float d1[2];
angle_t angle;
P_GetFloatpv(line, DMU_DXY, d1);
// The monster must contact one of the two floors, and the other
// must be a tall drop off (more than 24).
if(back == floorZ && front < floorZ - 24)
{
angle = R_PointToAngle2(0, 0, d1[0], d1[1]); // Front side drop off.
}
else
{
if(front == floorZ && back < floorZ - 24)
angle = R_PointToAngle2(d1[0], d1[1], 0, 0); // Back side drop off.
else
return true;
}
// Move away from drop off at a standard speed.
// Multiple contacted linedefs are cumulative (e.g. hanging over corner)
dropoffDelta[VX] -= FIX2FLT(finesine[angle >> ANGLETOFINESHIFT]) * 32;
dropoffDelta[VY] += FIX2FLT(finecosine[angle >> ANGLETOFINESHIFT]) * 32;
}
return true;
}
/**
* Driver for above.
*/
static boolean avoidDropoff(mobj_t *actor)
{
floorZ = actor->pos[VZ]; // Remember floor height.
dropoffDelta[VX] = dropoffDelta[VY] = 0;
VALIDCOUNT++;
// Check lines.
P_MobjLinesIterator(actor, PIT_AvoidDropoff, 0);
// Non-zero if movement prescribed.
return !(dropoffDelta[VX] == 0 || dropoffDelta[VY] == 0);
}
static void newChaseDir(mobj_t *actor)
{
mobj_t *target = actor->target;
float deltaX = target->pos[VX] - actor->pos[VX];
float deltaY = target->pos[VY] - actor->pos[VY];
if(actor->floorZ - actor->dropOffZ > 24 &&
actor->pos[VZ] <= actor->floorZ &&
!(actor->flags & (MF_DROPOFF | MF_FLOAT)) &&
!cfg.avoidDropoffs && avoidDropoff(actor))
{
// Move away from dropoff.
doNewChaseDir(actor, dropoffDelta[VX], dropoffDelta[VY]);
// $dropoff_fix
// If moving away from drop off, set movecount to 1 so that
// small steps are taken to get monster away from drop off.
actor->moveCount = 1;
return;
}
doNewChaseDir(actor, deltaX, deltaY);
}
/**
* If allaround is false, only look 180 degrees in front.
*
* @return @c true, if a player is targeted.
*/
static boolean lookForPlayers(mobj_t *actor, boolean allAround)
{
int c, stop, playerCount;
player_t *player;
angle_t an;
float dist;
playerCount = 0;
for(c = 0; c < MAXPLAYERS; ++c)
{
if(players[c].plr->inGame)
playerCount++;
}
// Are there any players?
if(!playerCount)
return false;
c = 0;
stop = (actor->lastLook - 1) & 3;
for(;; actor->lastLook = (actor->lastLook + 1) & 3)
{
if(!players[actor->lastLook].plr->inGame)
continue;
if(c++ == 2 || actor->lastLook == stop)
{ // Done looking.
return false;
}
player = &players[actor->lastLook];
if(P_MobjIsCamera(player->plr->mo))
continue;
if(player->health <= 0)
continue; // Player is already dead.
if(!P_CheckSight(actor, player->plr->mo))
continue; // Player is out of sight.
if(!allAround)
{
an = R_PointToAngle2(actor->pos[VX],
actor->pos[VY],
player->plr->mo->pos[VX],
player->plr->mo->pos[VY]);
an -= actor->angle;
if(an > ANG90 && an < ANG270)
{
dist =
P_ApproxDistance(player->plr->mo->pos[VX] - actor->pos[VX],
player->plr->mo->pos[VY] - actor->pos[VY]);
// If real close, react anyway.
if(dist > MELEERANGE)
continue; // Behind back.
}
}
actor->target = player->plr->mo;
return true;
}
}
static boolean massacreMobj(thinker_t* th, void* context)
{
int* count = (int*) context;
mobj_t* mo = (mobj_t *) th;
if(!mo->player && sentient(mo) && (mo->flags & MF_SHOOTABLE))
{
P_DamageMobj(mo, NULL, NULL, 10000, false);
(*count)++;
}
return true; // Continue iteration.
}
/**
* Kills all monsters.
*/
int P_Massacre(void)
{
int count = 0;
// Only massacre when actually in a map.
if(G_GetGameState() == GS_MAP)
{
DD_IterateThinkers(P_MobjThinker, massacreMobj, &count);
}
return count;
}
static boolean findBrainTarget(thinker_t* th, void* context)
{
mobj_t* mo = (mobj_t *) th;
if(mo->type == MT_BOSSTARGET)
{
if(numBrainTargets >= numBrainTargetsAlloc)
{
// Do we need to alloc more targets?
if(numBrainTargets == numBrainTargetsAlloc)
{
numBrainTargetsAlloc *= 2;
brainTargets =
Z_Realloc(brainTargets,
numBrainTargetsAlloc * sizeof(*brainTargets),
PU_MAP);
}
else
{
numBrainTargetsAlloc = 32;
brainTargets =
Z_Malloc(numBrainTargetsAlloc * sizeof(*brainTargets),
PU_MAP, NULL);
}
}
brainTargets[numBrainTargets++] = mo;
}
return true; // Continue iteration.
}
/**
* Initialize boss brain targets at map startup, rather than at boss
* wakeup, to prevent savegame-related crashes.
*
* \todo Does not belong in this file, find it a better home.
*/
void P_SpawnBrainTargets(void)
{
// Find all the target spots.
DD_IterateThinkers(P_MobjThinker, findBrainTarget, NULL);
}
typedef struct {
mobjtype_t type;
size_t count;
} countmobjoftypeparams_t;
static boolean countMobjOfType(thinker_t* th, void* context)
{
countmobjoftypeparams_t *params = (countmobjoftypeparams_t*) context;
mobj_t* mo = (mobj_t *) th;
if(params->type == mo->type && mo->health > 0)
params->count++;
return true; // Continue iteration.
}
/**
* DOOM II special, map 32. Uses special tag 666.
*/
void C_DECL A_KeenDie(mobj_t* mo)
{
countmobjoftypeparams_t params;
A_Fall(mo);
// Check if there are no more Keens left in the map.
params.type = mo->type;
params.count = 0;
DD_IterateThinkers(P_MobjThinker, countMobjOfType, ¶ms);
if(!params.count)
{ // No Keens left alive.
linedef_t* dummyLine = P_AllocDummyLine();
P_ToXLine(dummyLine)->tag = 666;
EV_DoDoor(dummyLine, DT_OPEN);
P_FreeDummyLine(dummyLine);
}
}
/**
* Stay in state until a player is sighted.
*/
void C_DECL A_Look(mobj_t* actor)
{
sector_t* sec = NULL;
mobj_t* targ;
sec = P_GetPtrp(actor->subsector, DMU_SECTOR);
if(!sec)
return;
actor->threshold = 0; // Any shot will wake us up.
targ = P_ToXSector(sec)->soundTarget;
if(targ && (targ->flags & MF_SHOOTABLE))
{
actor->target = targ;
if(actor->flags & MF_AMBUSH)
{
if(P_CheckSight(actor, actor->target))
goto seeyou;
}
else
goto seeyou;
}
if(!lookForPlayers(actor, false))
return;
// Go into chase state.
seeyou:
if(actor->info->seeSound)
{
int sound;
switch(actor->info->seeSound)
{
case SFX_POSIT1:
case SFX_POSIT2:
case SFX_POSIT3:
sound = SFX_POSIT1 + P_Random() % 3;
break;
case SFX_BGSIT1:
case SFX_BGSIT2:
sound = SFX_BGSIT1 + P_Random() % 2;
break;
default:
sound = actor->info->seeSound;
break;
}
if(actor->flags2 & MF2_BOSS)
{ // Full volume.
S_StartSound(sound | DDSF_NO_ATTENUATION, actor);
}
else
{
S_StartSound(sound, actor);
}
}
P_MobjChangeState(actor, P_GetState(actor->type, SN_SEE));
}
/**
* Actor has a melee attack, so it tries to close as fast as possible.
*/
void C_DECL A_Chase(mobj_t* actor)
{
int delta;
statenum_t state;
if(actor->reactionTime)
actor->reactionTime--;
// Modify target threshold.
if(actor->threshold)
{
if(!actor->target || actor->target->health <= 0)
{
actor->threshold = 0;
}
else
actor->threshold--;
}
// Turn towards movement direction if not there yet.
if(actor->moveDir < DI_NODIR)
{
actor->angle &= (7 << 29);
delta = actor->angle - (actor->moveDir << 29);
if(delta > 0)
actor->angle -= ANG90 / 2;
else if(delta < 0)
actor->angle += ANG90 / 2;
}
if(!actor->target || !(actor->target->flags & MF_SHOOTABLE) ||
P_MobjIsCamera(actor->target))
{
// Look for a new target.
if(lookForPlayers(actor, true))
{ // Got a new target.
}
else
{
P_MobjChangeState(actor, P_GetState(actor->type, SN_SPAWN));
}
return;
}
// Do not attack twice in a row.
if(actor->flags & MF_JUSTATTACKED)
{
actor->flags &= ~MF_JUSTATTACKED;
if(gameSkill != SM_NIGHTMARE && !fastParm)
newChaseDir(actor);
return;
}
// Check for melee attack.
if((state = P_GetState(actor->type, SN_MELEE)) != S_NULL &&
checkMeleeRange(actor))
{
if(actor->info->attackSound)
S_StartSound(actor->info->attackSound, actor);
P_MobjChangeState(actor, state);
return;
}
// Check for missile attack.
if((state = P_GetState(actor->type, SN_MISSILE)) != S_NULL)
{
if(!(gameSkill < SM_NIGHTMARE && !fastParm && actor->moveCount))
{
if(checkMissileRange(actor))
{
P_MobjChangeState(actor, state);
actor->flags |= MF_JUSTATTACKED;
return;
}
}
}
// Possibly choose another target.
if(IS_NETGAME && !actor->threshold &&
!P_CheckSight(actor, actor->target))
{
if(lookForPlayers(actor, true))
return; // Got a new target.
}
// Chase towards player.
if(--actor->moveCount < 0 || !moveMobj(actor, false))
{
newChaseDir(actor);
}
// Make active sound.
if(actor->info->activeSound && P_Random() < 3)
{
S_StartSound(actor->info->activeSound, actor);
}
}
void C_DECL A_FaceTarget(mobj_t *actor)
{
if(!actor->target)
return;
actor->turnTime = true; // $visangle-facetarget
actor->flags &= ~MF_AMBUSH;
actor->angle =
R_PointToAngle2(actor->pos[VX], actor->pos[VY],
actor->target->pos[VX], actor->target->pos[VY]);
if(actor->target->flags & MF_SHADOW)
actor->angle += (P_Random() - P_Random()) << 21;
}
void C_DECL A_PosAttack(mobj_t *actor)
{
int damage;
angle_t angle;
float slope;
if(!actor->target)
return;
A_FaceTarget(actor);
angle = actor->angle;
slope = P_AimLineAttack(actor, angle, MISSILERANGE);
S_StartSound(SFX_PISTOL, actor);
angle += (P_Random() - P_Random()) << 20;
damage = ((P_Random() % 5) + 1) * 3;
P_LineAttack(actor, angle, MISSILERANGE, slope, damage);
}
void C_DECL A_SPosAttack(mobj_t *actor)
{
int i, damage;
angle_t angle, bangle;
float slope;
if(!actor->target)
return;
S_StartSound(SFX_SHOTGN, actor);
A_FaceTarget(actor);
bangle = actor->angle;
slope = P_AimLineAttack(actor, bangle, MISSILERANGE);
for(i = 0; i < 3; ++i)
{
angle = bangle + ((P_Random() - P_Random()) << 20);
damage = ((P_Random() % 5) + 1) * 3;
P_LineAttack(actor, angle, MISSILERANGE, slope, damage);
}
}
void C_DECL A_CPosAttack(mobj_t* actor)
{
int angle, bangle, damage;
float slope;
if(!actor->target)
return;
S_StartSound(SFX_SHOTGN, actor);
A_FaceTarget(actor);
bangle = actor->angle;
slope = P_AimLineAttack(actor, bangle, MISSILERANGE);
angle = bangle + ((P_Random() - P_Random()) << 20);
damage = ((P_Random() % 5) + 1) * 3;
P_LineAttack(actor, angle, MISSILERANGE, slope, damage);
}
void C_DECL A_CPosRefire(mobj_t* actor)
{
// Keep firing unless target got out of sight.
A_FaceTarget(actor);
if(P_Random() < 40)
return;
if(!actor->target || actor->target->health <= 0 ||
!P_CheckSight(actor, actor->target))
{
P_MobjChangeState(actor, P_GetState(actor->type, SN_SEE));
}
}
void C_DECL A_SpidRefire(mobj_t* actor)
{
// Keep firing unless target got out of sight.
A_FaceTarget(actor);
if(P_Random() < 10)
return;
if(!actor->target || actor->target->health <= 0 ||
!P_CheckSight(actor, actor->target))
{
P_MobjChangeState(actor, P_GetState(actor->type, SN_SEE));
}
}
void C_DECL A_BspiAttack(mobj_t *actor)
{
if(!actor->target)
return;
A_FaceTarget(actor);
// Launch a missile.
P_SpawnMissile(MT_ARACHPLAZ, actor, actor->target);
}
void C_DECL A_TroopAttack(mobj_t *actor)
{
int damage;
if(!actor->target)
return;
A_FaceTarget(actor);
if(checkMeleeRange(actor))
{
S_StartSound(SFX_CLAW, actor);
damage = (P_Random() % 8 + 1) * 3;
P_DamageMobj(actor->target, actor, actor, damage, false);
return;
}
P_SpawnMissile(MT_TROOPSHOT, actor, actor->target);
}
void C_DECL A_SargAttack(mobj_t *actor)
{
int damage;
if(!actor->target)
return;
A_FaceTarget(actor);
if(checkMeleeRange(actor))
{
damage = ((P_Random() % 10) + 1) * 4;
P_DamageMobj(actor->target, actor, actor, damage, false);
}
}
void C_DECL A_HeadAttack(mobj_t *actor)
{
int damage;
if(!actor->target)
return;
A_FaceTarget(actor);
if(checkMeleeRange(actor))
{
damage = (P_Random() % 6 + 1) * 10;
P_DamageMobj(actor->target, actor, actor, damage, false);
return;
}
// Launch a missile.
P_SpawnMissile(MT_HEADSHOT, actor, actor->target);
}
/**
* Cyber Demon: Missile Attack.
*/
void C_DECL A_CyberAttack(mobj_t *actor)
{
if(!actor->target)
return;
A_FaceTarget(actor);
P_SpawnMissile(MT_ROCKET, actor, actor->target);
}
void C_DECL A_BruisAttack(mobj_t *actor)
{
int damage;