File: sv_user.c

package info (click to toggle)
darkplaces 0~20180412~beta1-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 18,200 kB
  • sloc: ansic: 176,886; makefile: 485; pascal: 455; perl: 372; objc: 245; sh: 102
file content (975 lines) | stat: -rw-r--r-- 35,596 bytes parent folder | download | duplicates (2)
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
/*
Copyright (C) 1996-1997 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// sv_user.c -- server code for moving users

#include "quakedef.h"
#include "sv_demo.h"
#define DEBUGMOVES 0

static usercmd_t cmd;
extern cvar_t sv_autodemo_perclient;

/*
===============
SV_SetIdealPitch
===============
*/
#define	MAX_FORWARD	6
void SV_SetIdealPitch (void)
{
	prvm_prog_t *prog = SVVM_prog;
	float	angleval, sinval, cosval, step, dir;
	trace_t	tr;
	vec3_t	top, bottom;
	float	z[MAX_FORWARD];
	int		i, j;
	int		steps;

	if (!((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND))
		return;

	angleval = PRVM_serveredictvector(host_client->edict, angles)[YAW] * M_PI*2 / 360;
	sinval = sin(angleval);
	cosval = cos(angleval);

	for (i=0 ; i<MAX_FORWARD ; i++)
	{
		top[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + cosval*(i+3)*12;
		top[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + sinval*(i+3)*12;
		top[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, view_ofs)[2];

		bottom[0] = top[0];
		bottom[1] = top[1];
		bottom[2] = top[2] - 160;

		tr = SV_TraceLine(top, bottom, MOVE_NOMONSTERS, host_client->edict, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value);
		// if looking at a wall, leave ideal the way is was
		if (tr.startsolid)
			return;

		// near a dropoff
		if (tr.fraction == 1)
			return;

		z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
	}

	dir = 0;
	steps = 0;
	for (j=1 ; j<i ; j++)
	{
		step = z[j] - z[j-1];
		if (step > -ON_EPSILON && step < ON_EPSILON)
			continue;

		// mixed changes
		if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
			return;

		steps++;
		dir = step;
	}

	if (!dir)
	{
		PRVM_serveredictfloat(host_client->edict, idealpitch) = 0;
		return;
	}

	if (steps < 2)
		return;
	PRVM_serveredictfloat(host_client->edict, idealpitch) = -dir * sv_idealpitchscale.value;
}

static vec3_t wishdir, forward, right, up;
static float wishspeed;

static qboolean onground;

/*
==================
SV_UserFriction

==================
*/
static void SV_UserFriction (void)
{
	prvm_prog_t *prog = SVVM_prog;
	float speed, newspeed, control, friction;
	vec3_t start, stop;
	trace_t trace;

	speed = sqrt(PRVM_serveredictvector(host_client->edict, velocity)[0]*PRVM_serveredictvector(host_client->edict, velocity)[0]+PRVM_serveredictvector(host_client->edict, velocity)[1]*PRVM_serveredictvector(host_client->edict, velocity)[1]);
	if (!speed)
		return;

	// if the leading edge is over a dropoff, increase friction
	start[0] = stop[0] = PRVM_serveredictvector(host_client->edict, origin)[0] + PRVM_serveredictvector(host_client->edict, velocity)[0]/speed*16;
	start[1] = stop[1] = PRVM_serveredictvector(host_client->edict, origin)[1] + PRVM_serveredictvector(host_client->edict, velocity)[1]/speed*16;
	start[2] = PRVM_serveredictvector(host_client->edict, origin)[2] + PRVM_serveredictvector(host_client->edict, mins)[2];
	stop[2] = start[2] - 34;

	trace = SV_TraceLine(start, stop, MOVE_NOMONSTERS, host_client->edict, SV_GenericHitSuperContentsMask(host_client->edict), 0, 0, collision_extendmovelength.value);

	if (trace.fraction == 1.0)
		friction = sv_friction.value*sv_edgefriction.value;
	else
		friction = sv_friction.value;

	// apply friction
	control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
	newspeed = speed - sv.frametime*control*friction;

	if (newspeed < 0)
		newspeed = 0;
	else
		newspeed /= speed;

	VectorScale(PRVM_serveredictvector(host_client->edict, velocity), newspeed, PRVM_serveredictvector(host_client->edict, velocity));
}

/*
==============
SV_Accelerate
==============
*/
static void SV_Accelerate (void)
{
	prvm_prog_t *prog = SVVM_prog;
	int i;
	float addspeed, accelspeed, currentspeed;

	currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishdir);
	addspeed = wishspeed - currentspeed;
	if (addspeed <= 0)
		return;
	accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
	if (accelspeed > addspeed)
		accelspeed = addspeed;

	for (i=0 ; i<3 ; i++)
		PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishdir[i];
}

extern cvar_t sv_gameplayfix_q2airaccelerate;
static void SV_AirAccelerate (vec3_t wishveloc)
{
	prvm_prog_t *prog = SVVM_prog;
	int i;
	float addspeed, wishspd, accelspeed, currentspeed;

	wishspd = VectorNormalizeLength (wishveloc);
	if (wishspd > sv_maxairspeed.value)
		wishspd = sv_maxairspeed.value;
	currentspeed = DotProduct (PRVM_serveredictvector(host_client->edict, velocity), wishveloc);
	addspeed = wishspd - currentspeed;
	if (addspeed <= 0)
		return;
	accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*(sv_gameplayfix_q2airaccelerate.integer ? wishspd : wishspeed) * sv.frametime;
	if (accelspeed > addspeed)
		accelspeed = addspeed;

	for (i=0 ; i<3 ; i++)
		PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed*wishveloc[i];
}


static void DropPunchAngle (void)
{
	prvm_prog_t *prog = SVVM_prog;
	vec_t len;
	vec3_t punchangle, punchvector;

	VectorCopy(PRVM_serveredictvector(host_client->edict, punchangle), punchangle);
	VectorCopy(PRVM_serveredictvector(host_client->edict, punchvector), punchvector);

	len = VectorNormalizeLength(punchangle);
	if (len > 0)
	{
		len -= 10*sv.frametime;
		if (len < 0)
			len = 0;
		VectorScale(punchangle, len, punchangle);
	}

	len = VectorNormalizeLength(punchvector);
	if (len > 0)
	{
		len -= 20*sv.frametime;
		if (len < 0)
			len = 0;
		VectorScale(punchvector, len, punchvector);
	}

	VectorCopy(punchangle, PRVM_serveredictvector(host_client->edict, punchangle));
	VectorCopy(punchvector, PRVM_serveredictvector(host_client->edict, punchvector));
}

/*
===================
SV_WaterMove

===================
*/
static void SV_WaterMove (void)
{
	prvm_prog_t *prog = SVVM_prog;
	int i;
	vec3_t wishvel, v_angle;
	vec_t speed, newspeed, fwishspeed, addspeed, accelspeed, temp;

	// user intentions
	VectorCopy(PRVM_serveredictvector(host_client->edict, v_angle), v_angle);
	AngleVectors(v_angle, forward, right, up);

	for (i=0 ; i<3 ; i++)
		wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;

	if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
		wishvel[2] -= 60;		// drift towards bottom
	else
		wishvel[2] += cmd.upmove;

	fwishspeed = VectorLength(wishvel);
	if (fwishspeed > sv_maxspeed.value)
	{
		temp = sv_maxspeed.value/fwishspeed;
		VectorScale (wishvel, temp, wishvel);
		fwishspeed = sv_maxspeed.value;
	}
	fwishspeed *= 0.7;

	// water friction
	speed = VectorLength(PRVM_serveredictvector(host_client->edict, velocity));
	if (speed)
	{
		newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
		if (newspeed < 0)
			newspeed = 0;
		temp = newspeed/speed;
		VectorScale(PRVM_serveredictvector(host_client->edict, velocity), temp, PRVM_serveredictvector(host_client->edict, velocity));
	}
	else
		newspeed = 0;

	// water acceleration
	if (!fwishspeed)
		return;

	addspeed = fwishspeed - newspeed;
	if (addspeed <= 0)
		return;

	VectorNormalize (wishvel);
	accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * fwishspeed * sv.frametime;
	if (accelspeed > addspeed)
		accelspeed = addspeed;

	for (i=0 ; i<3 ; i++)
		PRVM_serveredictvector(host_client->edict, velocity)[i] += accelspeed * wishvel[i];
}

static void SV_WaterJump (void)
{
	prvm_prog_t *prog = SVVM_prog;
	if (sv.time > PRVM_serveredictfloat(host_client->edict, teleport_time) || !PRVM_serveredictfloat(host_client->edict, waterlevel))
	{
		PRVM_serveredictfloat(host_client->edict, flags) = (int)PRVM_serveredictfloat(host_client->edict, flags) & ~FL_WATERJUMP;
		PRVM_serveredictfloat(host_client->edict, teleport_time) = 0;
	}
	PRVM_serveredictvector(host_client->edict, velocity)[0] = PRVM_serveredictvector(host_client->edict, movedir)[0];
	PRVM_serveredictvector(host_client->edict, velocity)[1] = PRVM_serveredictvector(host_client->edict, movedir)[1];
}


/*
===================
SV_AirMove

===================
*/
static void SV_AirMove (void)
{
	prvm_prog_t *prog = SVVM_prog;
	int i;
	vec3_t wishvel;
	float fmove, smove, temp;

	// LordHavoc: correct quake movement speed bug when looking up/down
	wishvel[0] = wishvel[2] = 0;
	wishvel[1] = PRVM_serveredictvector(host_client->edict, angles)[1];
	AngleVectors (wishvel, forward, right, up);

	fmove = cmd.forwardmove;
	smove = cmd.sidemove;

// hack to not let you back into teleporter
	if (sv.time < PRVM_serveredictfloat(host_client->edict, teleport_time) && fmove < 0)
		fmove = 0;

	for (i=0 ; i<3 ; i++)
		wishvel[i] = forward[i]*fmove + right[i]*smove;

	if ((int)PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_WALK)
		wishvel[2] += cmd.upmove;

	VectorCopy (wishvel, wishdir);
	wishspeed = VectorNormalizeLength(wishdir);
	if (wishspeed > sv_maxspeed.value)
	{
		temp = sv_maxspeed.value/wishspeed;
		VectorScale (wishvel, temp, wishvel);
		wishspeed = sv_maxspeed.value;
	}

	if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NOCLIP)
	{
		// noclip
		VectorCopy (wishvel, PRVM_serveredictvector(host_client->edict, velocity));
	}
	else if (onground)
	{
		SV_UserFriction ();
		SV_Accelerate ();
	}
	else
	{
		// not on ground, so little effect on velocity
		SV_AirAccelerate (wishvel);
	}
}

/*
===================
SV_ClientThink

the move fields specify an intended velocity in pix/sec
the angle fields specify an exact angular motion in degrees
===================
*/
void SV_ClientThink (void)
{
	prvm_prog_t *prog = SVVM_prog;
	vec3_t v_angle, angles, velocity;

	//Con_Printf("clientthink for %ims\n", (int) (sv.frametime * 1000));

	SV_ApplyClientMove();
	// make sure the velocity is sane (not a NaN)
	SV_CheckVelocity(host_client->edict);

	// LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
	if (PRVM_serverfunction(SV_PlayerPhysics) && sv_playerphysicsqc.integer)
	{
		PRVM_serverglobalfloat(time) = sv.time;
		PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
		prog->ExecuteProgram(prog, PRVM_serverfunction(SV_PlayerPhysics), "QC function SV_PlayerPhysics is missing");
		SV_CheckVelocity(host_client->edict);
		return;
	}

	if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NONE)
		return;

	onground = ((int)PRVM_serveredictfloat(host_client->edict, flags) & FL_ONGROUND) != 0;

	DropPunchAngle ();

	// if dead, behave differently
	if (PRVM_serveredictfloat(host_client->edict, health) <= 0)
		return;

	cmd = host_client->cmd;

	// angles
	// show 1/3 the pitch angle and all the roll angle
	VectorAdd (PRVM_serveredictvector(host_client->edict, v_angle), PRVM_serveredictvector(host_client->edict, punchangle), v_angle);
	VectorCopy(PRVM_serveredictvector(host_client->edict, angles), angles);
	VectorCopy(PRVM_serveredictvector(host_client->edict, velocity), velocity);
	PRVM_serveredictvector(host_client->edict, angles)[ROLL] = V_CalcRoll (angles, velocity)*4;
	if (!PRVM_serveredictfloat(host_client->edict, fixangle))
	{
		PRVM_serveredictvector(host_client->edict, angles)[PITCH] = -v_angle[PITCH]/3;
		PRVM_serveredictvector(host_client->edict, angles)[YAW] = v_angle[YAW];
	}

	if ( (int)PRVM_serveredictfloat(host_client->edict, flags) & FL_WATERJUMP )
	{
		SV_WaterJump ();
		SV_CheckVelocity(host_client->edict);
		return;
	}

	/*
	// Player is (somehow) outside of the map, or flying, or noclipping
	if (PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_NOCLIP && (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict)))
	//if (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_NOCLIP || PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict))
	{
		SV_FreeMove ();
		return;
	}
	*/

	// walk
	if ((PRVM_serveredictfloat(host_client->edict, waterlevel) >= 2) && (PRVM_serveredictfloat(host_client->edict, movetype) != MOVETYPE_NOCLIP))
	{
		SV_WaterMove ();
		SV_CheckVelocity(host_client->edict);
		return;
	}

	SV_AirMove ();
	SV_CheckVelocity(host_client->edict);
}

/*
===================
SV_ReadClientMove
===================
*/
int sv_numreadmoves = 0;
usercmd_t sv_readmoves[CL_MAX_USERCMDS];
static void SV_ReadClientMove (void)
{
	prvm_prog_t *prog = SVVM_prog;
	int i;
	usercmd_t newmove;
	usercmd_t *move = &newmove;

	memset(move, 0, sizeof(*move));

	if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);

	// read ping time
	if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3 && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5 && sv.protocol != PROTOCOL_DARKPLACES6)
		move->sequence = MSG_ReadLong(&sv_message);
	move->time = move->clienttime = MSG_ReadFloat(&sv_message);
	if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
	move->receivetime = (float)sv.time;

#if DEBUGMOVES
	Con_Printf("%s move%i #%u %ims (%ims) %i %i '%i %i %i' '%i %i %i'\n", move->time > move->receivetime ? "^3read future" : "^4read normal", sv_numreadmoves + 1, move->sequence, (int)floor((move->time - host_client->cmd.time) * 1000.0 + 0.5), (int)floor(move->time * 1000.0 + 0.5), move->impulse, move->buttons, (int)move->viewangles[0], (int)move->viewangles[1], (int)move->viewangles[2], (int)move->forwardmove, (int)move->sidemove, (int)move->upmove);
#endif
	// limit reported time to current time
	// (incase the client is trying to cheat)
	move->time = min(move->time, move->receivetime + sv.frametime);

	// read current angles
	for (i = 0;i < 3;i++)
	{
		if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3)
			move->viewangles[i] = MSG_ReadAngle8i(&sv_message);
		else if (sv.protocol == PROTOCOL_DARKPLACES1)
			move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
		else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
			move->viewangles[i] = MSG_ReadAngle32f(&sv_message);
		else
			move->viewangles[i] = MSG_ReadAngle16i(&sv_message);
	}
	if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);

	// read movement
	move->forwardmove = MSG_ReadCoord16i(&sv_message);
	move->sidemove = MSG_ReadCoord16i(&sv_message);
	move->upmove = MSG_ReadCoord16i(&sv_message);
	if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);

	// read buttons
	// be sure to bitwise OR them into the move->buttons because we want to
	// accumulate button presses from multiple packets per actual move
	if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3 || sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4 || sv.protocol == PROTOCOL_DARKPLACES5)
		move->buttons = MSG_ReadByte(&sv_message);
	else
		move->buttons = MSG_ReadLong(&sv_message);
	if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);

	// read impulse
	move->impulse = MSG_ReadByte(&sv_message);
	if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);

	// PRYDON_CLIENTCURSOR
	if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3 && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5)
	{
		// 30 bytes
		move->cursor_screen[0] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
		move->cursor_screen[1] = MSG_ReadShort(&sv_message) * (1.0f / 32767.0f);
		move->cursor_start[0] = MSG_ReadFloat(&sv_message);
		move->cursor_start[1] = MSG_ReadFloat(&sv_message);
		move->cursor_start[2] = MSG_ReadFloat(&sv_message);
		move->cursor_impact[0] = MSG_ReadFloat(&sv_message);
		move->cursor_impact[1] = MSG_ReadFloat(&sv_message);
		move->cursor_impact[2] = MSG_ReadFloat(&sv_message);
		move->cursor_entitynumber = (unsigned short)MSG_ReadShort(&sv_message);
		if (move->cursor_entitynumber >= prog->max_edicts)
		{
			Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
			move->cursor_entitynumber = 0;
		}
		// as requested by FrikaC, cursor_trace_ent is reset to world if the
		// entity is free at time of receipt
		if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
			move->cursor_entitynumber = 0;
		if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
	}

	// if the previous move has not been applied yet, we need to accumulate
	// the impulse/buttons from it
	if (!host_client->cmd.applied)
	{
		if (!move->impulse)
			move->impulse = host_client->cmd.impulse;
		move->buttons |= host_client->cmd.buttons;
	}

	// now store this move for later execution
	// (we have to buffer the moves because of old ones being repeated)
	if (sv_numreadmoves < CL_MAX_USERCMDS)
		sv_readmoves[sv_numreadmoves++] = *move;

	// movement packet loss tracking
	if(move->sequence)
	{
		if(move->sequence > host_client->movement_highestsequence_seen)
		{
			if(host_client->movement_highestsequence_seen)
			{
				// mark moves in between as lost
				unsigned int delta = move->sequence - host_client->movement_highestsequence_seen - 1;
				if(delta < NETGRAPH_PACKETS)
				{
					unsigned int u;
					for(u = 0; u < delta; ++u)
						host_client->movement_count[(host_client->movement_highestsequence_seen + 1 + u) % NETGRAPH_PACKETS] = -1;
				}
				else
					memset(host_client->movement_count, -1, sizeof(host_client->movement_count));
			}
			// mark THIS move as seen for the first time
			host_client->movement_count[move->sequence % NETGRAPH_PACKETS] = 1;
			// update highest sequence seen
			host_client->movement_highestsequence_seen = move->sequence;
		}
		else
			if(host_client->movement_count[move->sequence % NETGRAPH_PACKETS] >= 0)
				++host_client->movement_count[move->sequence % NETGRAPH_PACKETS];
	}
	else
	{
		host_client->movement_highestsequence_seen = 0;
		memset(host_client->movement_count, 0, sizeof(host_client->movement_count));
	}
}

static void SV_ExecuteClientMoves(void)
{
	prvm_prog_t *prog = SVVM_prog;
	int moveindex;
	float moveframetime;
	double oldframetime;
	double oldframetime2;
#ifdef NUM_PING_TIMES
	double total;
#endif
	if (sv_numreadmoves < 1)
		return;
	// only start accepting input once the player is spawned
	if (!host_client->begun)
		return;
#if DEBUGMOVES
	Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
#endif
	// disable clientside movement prediction in some cases
	if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
		host_client->clmovement_disabletimeout = realtime + sv_clmovement_minping_disabletime.value / 1000.0;
	// several conditions govern whether clientside movement prediction is allowed
	if (sv_readmoves[sv_numreadmoves-1].sequence && sv_clmovement_enable.integer && sv_clmovement_inputtimeout.value > 0 && host_client->clmovement_disabletimeout <= realtime && (PRVM_serveredictfloat(host_client->edict, disableclientprediction) == -1 || (PRVM_serveredictfloat(host_client->edict, movetype) == MOVETYPE_WALK && (!PRVM_serveredictfloat(host_client->edict, disableclientprediction)))))
	{
		// process the moves in order and ignore old ones
		// but always trust the latest move
		// (this deals with bogus initial move sequences after level change,
		//  where the client will eventually catch up with the level change
		//  and reset its move sequence)
		for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
		{
			usercmd_t *move = sv_readmoves + moveindex;
			if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
			{
#if DEBUGMOVES
				Con_Printf("%smove #%u %ims (%ims) %i %i '%i %i %i' '%i %i %i'\n", (move->time - host_client->cmd.time) > sv.frametime * 1.01 ? "^1" : "^2", move->sequence, (int)floor((move->time - host_client->cmd.time) * 1000.0 + 0.5), (int)floor(move->time * 1000.0 + 0.5), move->impulse, move->buttons, (int)move->viewangles[0], (int)move->viewangles[1], (int)move->viewangles[2], (int)move->forwardmove, (int)move->sidemove, (int)move->upmove);
#endif
				// this is a new move
				move->time = bound(sv.time - 1, move->time, sv.time); // prevent slowhack/speedhack combos
				move->time = max(move->time, host_client->cmd.time); // prevent backstepping of time
				moveframetime = bound(0, move->time - host_client->cmd.time, min(0.1, sv_clmovement_inputtimeout.value));

				// discard (treat like lost) moves with too low distance from
				// the previous one to prevent hacks using float inaccuracy
				// clients will see this as packet loss in the netgraph
				// this should also apply if a move cannot get
				// executed because it came too late and
				// already was performed serverside
				if(moveframetime < 0.0005)
				{
					// count the move as LOST if we don't
					// execute it but it has higher
					// sequence count
					if(host_client->movesequence)
						if(move->sequence > host_client->movesequence)
							host_client->movement_count[(move->sequence) % NETGRAPH_PACKETS] = -1;
					continue;
				}

				//Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
				host_client->cmd = *move;
				host_client->movesequence = move->sequence;

				// if using prediction, we need to perform moves when packets are
				// received, even if multiple occur in one frame
				// (they can't go beyond the current time so there is no cheat issue
				//  with this approach, and if they don't send input for a while they
				//  start moving anyway, so the longest 'lagaport' possible is
				//  determined by the sv_clmovement_inputtimeout cvar)
				if (moveframetime <= 0)
					continue;
				oldframetime = PRVM_serverglobalfloat(frametime);
				oldframetime2 = sv.frametime;
				// update ping time for qc to see while executing this move
				host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
				// the server and qc frametime values must be changed temporarily
				PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime;
				// if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
				if (sv.frametime > 0.05)
				{
					PRVM_serverglobalfloat(frametime) = sv.frametime = moveframetime * 0.5f;
					SV_Physics_ClientMove();
				}
				SV_Physics_ClientMove();
				sv.frametime = oldframetime2;
				PRVM_serverglobalfloat(frametime) = oldframetime;
				host_client->clmovement_inputtimeout = sv_clmovement_inputtimeout.value;
			}
		}
	}
	else
	{
		// try to gather button bits from old moves, but only if their time is
		// advancing (ones with the same timestamp can't be trusted)
		for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
		{
			usercmd_t *move = sv_readmoves + moveindex;
			if (host_client->cmd.time < move->time)
			{
				sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
				if (move->impulse)
					sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
			}
		}
		// now copy the new move
		host_client->cmd = sv_readmoves[sv_numreadmoves-1];
		host_client->cmd.time = max(host_client->cmd.time, sv.time);
			// physics will run up to sv.time, so allow no predicted moves
			// before that otherwise, there is a speedhack by turning
			// prediction on and off repeatedly on client side because the
			// engine would run BOTH client and server physics for the same
			// time
		host_client->movesequence = 0;
		// make sure that normal physics takes over immediately
		host_client->clmovement_inputtimeout = 0;
	}

	// calculate average ping time
	host_client->ping = host_client->cmd.receivetime - host_client->cmd.clienttime;
#ifdef NUM_PING_TIMES
	host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = host_client->cmd.receivetime - host_client->cmd.clienttime;
	host_client->num_pings++;
	for (i=0, total = 0;i < NUM_PING_TIMES;i++)
		total += host_client->ping_times[i];
	host_client->ping = total / NUM_PING_TIMES;
#endif
}

void SV_ApplyClientMove (void)
{
	prvm_prog_t *prog = SVVM_prog;
	usercmd_t *move = &host_client->cmd;
	int j, movementloss, packetloss;

	if (!move->receivetime)
		return;

	// note: a move can be applied multiple times if the client packets are
	// not coming as often as the physics is executed, and the move must be
	// applied before running qc each time because the id1 qc had a bug where
	// it clears self.button2 in PlayerJump, causing pogostick behavior if
	// moves are not applied every time before calling qc
	move->applied = true;

	// set the edict fields
	PRVM_serveredictfloat(host_client->edict, button0) = move->buttons & 1;
	PRVM_serveredictfloat(host_client->edict, button2) = (move->buttons & 2)>>1;
	if (move->impulse)
		PRVM_serveredictfloat(host_client->edict, impulse) = move->impulse;
	// only send the impulse to qc once
	move->impulse = 0;

	movementloss = packetloss = 0;
	if(host_client->netconnection)
	{
		for (j = 0;j < NETGRAPH_PACKETS;j++)
			if (host_client->netconnection->incoming_netgraph[j].unreliablebytes == NETGRAPH_LOSTPACKET)
				packetloss++;
		for (j = 0;j < NETGRAPH_PACKETS;j++)
			if (host_client->movement_count[j] < 0)
				movementloss++;
	}

	VectorCopy(move->viewangles, PRVM_serveredictvector(host_client->edict, v_angle));
	PRVM_serveredictfloat(host_client->edict, button3) = ((move->buttons >> 2) & 1);
	PRVM_serveredictfloat(host_client->edict, button4) = ((move->buttons >> 3) & 1);
	PRVM_serveredictfloat(host_client->edict, button5) = ((move->buttons >> 4) & 1);
	PRVM_serveredictfloat(host_client->edict, button6) = ((move->buttons >> 5) & 1);
	PRVM_serveredictfloat(host_client->edict, button7) = ((move->buttons >> 6) & 1);
	PRVM_serveredictfloat(host_client->edict, button8) = ((move->buttons >> 7) & 1);
	PRVM_serveredictfloat(host_client->edict, button9) = ((move->buttons >> 11) & 1);
	PRVM_serveredictfloat(host_client->edict, button10) = ((move->buttons >> 12) & 1);
	PRVM_serveredictfloat(host_client->edict, button11) = ((move->buttons >> 13) & 1);
	PRVM_serveredictfloat(host_client->edict, button12) = ((move->buttons >> 14) & 1);
	PRVM_serveredictfloat(host_client->edict, button13) = ((move->buttons >> 15) & 1);
	PRVM_serveredictfloat(host_client->edict, button14) = ((move->buttons >> 16) & 1);
	PRVM_serveredictfloat(host_client->edict, button15) = ((move->buttons >> 17) & 1);
	PRVM_serveredictfloat(host_client->edict, button16) = ((move->buttons >> 18) & 1);
	PRVM_serveredictfloat(host_client->edict, buttonuse) = ((move->buttons >> 8) & 1);
	PRVM_serveredictfloat(host_client->edict, buttonchat) = ((move->buttons >> 9) & 1);
	PRVM_serveredictfloat(host_client->edict, cursor_active) = ((move->buttons >> 10) & 1);
	VectorSet(PRVM_serveredictvector(host_client->edict, movement), move->forwardmove, move->sidemove, move->upmove);
	VectorCopy(move->cursor_screen, PRVM_serveredictvector(host_client->edict, cursor_screen));
	VectorCopy(move->cursor_start, PRVM_serveredictvector(host_client->edict, cursor_trace_start));
	VectorCopy(move->cursor_impact, PRVM_serveredictvector(host_client->edict, cursor_trace_endpos));
	PRVM_serveredictedict(host_client->edict, cursor_trace_ent) = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
	PRVM_serveredictfloat(host_client->edict, ping) = host_client->ping * 1000.0;
	PRVM_serveredictfloat(host_client->edict, ping_packetloss) = packetloss / (float) NETGRAPH_PACKETS;
	PRVM_serveredictfloat(host_client->edict, ping_movementloss) = movementloss / (float) NETGRAPH_PACKETS;
}

static qboolean SV_FrameLost(int framenum)
{
	if (host_client->entitydatabase5)
	{
		if (framenum <= host_client->entitydatabase5->latestframenum)
		{
			EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
			EntityFrameCSQC_LostFrame(host_client, framenum);
			return true;
		}
	}
	return false;
}

static void SV_FrameAck(int framenum)
{
	if (host_client->entitydatabase)
		EntityFrame_AckFrame(host_client->entitydatabase, framenum);
	else if (host_client->entitydatabase4)
		EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
	else if (host_client->entitydatabase5)
		EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
}

/*
===================
SV_ReadClientMessage
===================
*/
void SV_ReadClientMessage(void)
{
	prvm_prog_t *prog = SVVM_prog;
	int netcmd, num, start;
	char *s, *p, *q;

	if(sv_autodemo_perclient.integer >= 2)
		SV_WriteDemoMessage(host_client, &(host_client->netconnection->message), true);

	//MSG_BeginReading ();
	sv_numreadmoves = 0;

	for(;;)
	{
		if (!host_client->active)
		{
			// a command caused an error
			SV_DropClient (false);
			return;
		}

		if (sv_message.badread)
		{
			Con_Print("SV_ReadClientMessage: badread\n");
			SV_DropClient (false);
			return;
		}

		netcmd = MSG_ReadByte(&sv_message);
		if (netcmd == -1)
		{
			// end of message
			// apply the moves that were read this frame
			SV_ExecuteClientMoves();
			break;
		}

		switch (netcmd)
		{
		default:
			Con_Printf("SV_ReadClientMessage: unknown command char %i (at offset 0x%x)\n", netcmd, sv_message.readcount);
			if (developer_networking.integer)
				Com_HexDumpToConsole(sv_message.data, sv_message.cursize);
			SV_DropClient (false);
			return;

		case clc_nop:
			break;

		case clc_stringcmd:
			// allow reliable messages now as the client is done with initial loading
			if (host_client->sendsignon == 2)
				host_client->sendsignon = 0;
			s = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
			q = NULL;
			for(p = s; *p; ++p) switch(*p)
			{
				case 10:
				case 13:
					if(!q)
						q = p;
					break;
				default:
					if(q)
						goto clc_stringcmd_invalid; // newline seen, THEN something else -> possible exploit
					break;
			}
			if(q)
				*q = 0;
			if (strncasecmp(s, "spawn", 5) == 0
			 || strncasecmp(s, "begin", 5) == 0
			 || strncasecmp(s, "prespawn", 8) == 0)
				Cmd_ExecuteString (s, src_client, true);
			else if (PRVM_serverfunction(SV_ParseClientCommand))
			{
				int restorevm_tempstringsbuf_cursize;
				restorevm_tempstringsbuf_cursize = prog->tempstringsbuf.cursize;
				PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(prog, s);
				PRVM_serverglobalfloat(time) = sv.time;
				PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(host_client->edict);
				prog->ExecuteProgram(prog, PRVM_serverfunction(SV_ParseClientCommand), "QC function SV_ParseClientCommand is missing");
				prog->tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
			}
			else
				Cmd_ExecuteString (s, src_client, true);
			break;

clc_stringcmd_invalid:
			Con_Printf("Received invalid stringcmd from %s\n", host_client->name);
			if(developer.integer > 0)
				Com_HexDumpToConsole((unsigned char *) s, (int)strlen(s));
			break;

		case clc_disconnect:
			SV_DropClient (false); // client wants to disconnect
			return;

		case clc_move:
			SV_ReadClientMove();
			break;

		case clc_ackdownloaddata:
			start = MSG_ReadLong(&sv_message);
			num = MSG_ReadShort(&sv_message);
			if (host_client->download_file && host_client->download_started)
			{
				if (host_client->download_expectedposition == start)
				{
					int size = (int)FS_FileSize(host_client->download_file);
					// a data block was successfully received by the client,
					// update the expected position on the next data block
					host_client->download_expectedposition = start + num;
					// if this was the last data block of the file, it's done
					if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
					{
						// tell the client that the download finished
						// we need to calculate the crc now
						//
						// note: at this point the OS probably has the file
						// entirely in memory, so this is a faster operation
						// now than it was when the download started.
						//
						// it is also preferable to do this at the end of the
						// download rather than the start because it reduces
						// potential for Denial Of Service attacks against the
						// server.
						int crc;
						unsigned char *temp;
						FS_Seek(host_client->download_file, 0, SEEK_SET);
						temp = (unsigned char *) Mem_Alloc(tempmempool, size);
						FS_Read(host_client->download_file, temp, size);
						crc = CRC_Block(temp, size);
						Mem_Free(temp);
						// calculated crc, send the file info to the client
						// (so that it can verify the data)
						Host_ClientCommands("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name);
						Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
						FS_Close(host_client->download_file);
						host_client->download_file = NULL;
						host_client->download_name[0] = 0;
						host_client->download_expectedposition = 0;
						host_client->download_started = false;
					}
				}
				else
				{
					// a data block was lost, reset to the expected position
					// and resume sending from there
					FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
				}
			}
			break;

		case clc_ackframe:
			if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
			num = MSG_ReadLong(&sv_message);
			if (sv_message.badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
			if (developer_networkentities.integer >= 10)
				Con_Printf("recv clc_ackframe %i\n", num);
			// if the client hasn't progressed through signons yet,
			// ignore any clc_ackframes we get (they're probably from the
			// previous level)
			if (host_client->begun && host_client->latestframenum < num)
			{
				int i;
				for (i = host_client->latestframenum + 1;i < num;i++)
					if (!SV_FrameLost(i))
						break;
				SV_FrameAck(num);
				host_client->latestframenum = num;
			}
			break;
		}
	}
}