aboutsummaryrefslogtreecommitdiffstats
path: root/code/client/cl_cgame.c
blob: 10deeff1e63bd15b0c33d90bd7fa351094f548ad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena source code 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.

Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/
// cl_cgame.c  -- client system interaction with client game

#include "client.h"

#include "../botlib/botlib.h"

extern	botlib_export_t	*botlib_export;

extern qboolean loadCamera(const char *name);
extern void startCamera(int time);
extern qboolean getCameraInfo(int time, vec3_t *origin, vec3_t *angles);

/*
====================
CL_GetGameState
====================
*/
void CL_GetGameState( gameState_t *gs ) {
	*gs = cl.gameState;
}

/*
====================
CL_GetGlconfig
====================
*/
void CL_GetGlconfig( glconfig_t *glconfig ) {
	*glconfig = cls.glconfig;
}


/*
====================
CL_GetUserCmd
====================
*/
qboolean CL_GetUserCmd( int cmdNumber, usercmd_t *ucmd ) {
	// cmds[cmdNumber] is the last properly generated command

	// can't return anything that we haven't created yet
	if ( cmdNumber > cl.cmdNumber ) {
		Com_Error( ERR_DROP, "CL_GetUserCmd: %i >= %i", cmdNumber, cl.cmdNumber );
	}

	// the usercmd has been overwritten in the wrapping
	// buffer because it is too far out of date
	if ( cmdNumber <= cl.cmdNumber - CMD_BACKUP ) {
		return qfalse;
	}

	*ucmd = cl.cmds[ cmdNumber & CMD_MASK ];

	return qtrue;
}

int CL_GetCurrentCmdNumber( void ) {
	return cl.cmdNumber;
}


/*
====================
CL_GetParseEntityState
====================
*/
qboolean	CL_GetParseEntityState( int parseEntityNumber, entityState_t *state ) {
	// can't return anything that hasn't been parsed yet
	if ( parseEntityNumber >= cl.parseEntitiesNum ) {
		Com_Error( ERR_DROP, "CL_GetParseEntityState: %i >= %i",
			parseEntityNumber, cl.parseEntitiesNum );
	}

	// can't return anything that has been overwritten in the circular buffer
	if ( parseEntityNumber <= cl.parseEntitiesNum - MAX_PARSE_ENTITIES ) {
		return qfalse;
	}

	*state = cl.parseEntities[ parseEntityNumber & ( MAX_PARSE_ENTITIES - 1 ) ];
	return qtrue;
}

/*
====================
CL_GetCurrentSnapshotNumber
====================
*/
void	CL_GetCurrentSnapshotNumber( int *snapshotNumber, int *serverTime ) {
	*snapshotNumber = cl.snap.messageNum;
	*serverTime = cl.snap.serverTime;
}

/*
====================
CL_GetSnapshot
====================
*/
qboolean	CL_GetSnapshot( int snapshotNumber, snapshot_t *snapshot ) {
	clSnapshot_t	*clSnap;
	int				i, count;

	if ( snapshotNumber > cl.snap.messageNum ) {
		Com_Error( ERR_DROP, "CL_GetSnapshot: snapshotNumber > cl.snapshot.messageNum" );
	}

	// if the frame has fallen out of the circular buffer, we can't return it
	if ( cl.snap.messageNum - snapshotNumber >= PACKET_BACKUP ) {
		return qfalse;
	}

	// if the frame is not valid, we can't return it
	clSnap = &cl.snapshots[snapshotNumber & PACKET_MASK];
	if ( !clSnap->valid ) {
		return qfalse;
	}

	// if the entities in the frame have fallen out of their
	// circular buffer, we can't return it
	if ( cl.parseEntitiesNum - clSnap->parseEntitiesNum >= MAX_PARSE_ENTITIES ) {
		return qfalse;
	}

	// write the snapshot
	snapshot->snapFlags = clSnap->snapFlags;
	snapshot->serverCommandSequence = clSnap->serverCommandNum;
	snapshot->ping = clSnap->ping;
	snapshot->serverTime = clSnap->serverTime;
	Com_Memcpy( snapshot->areamask, clSnap->areamask, sizeof( snapshot->areamask ) );
	snapshot->ps = clSnap->ps;
	count = clSnap->numEntities;
	if ( count > MAX_ENTITIES_IN_SNAPSHOT ) {
		Com_DPrintf( "CL_GetSnapshot: truncated %i entities to %i\n", count, MAX_ENTITIES_IN_SNAPSHOT );
		count = MAX_ENTITIES_IN_SNAPSHOT;
	}
	snapshot->numEntities = count;
	for ( i = 0 ; i < count ; i++ ) {
		snapshot->entities[i] = 
			cl.parseEntities[ ( clSnap->parseEntitiesNum + i ) & (MAX_PARSE_ENTITIES-1) ];
	}

	// FIXME: configstring changes and server commands!!!

	return qtrue;
}

/*
=====================
CL_SetUserCmdValue
=====================
*/
void CL_SetUserCmdValue( int userCmdValue, float sensitivityScale ) {
	cl.cgameUserCmdValue = userCmdValue;
	cl.cgameSensitivity = sensitivityScale;
}

/*
=====================
CL_AddCgameCommand
=====================
*/
void CL_AddCgameCommand( const char *cmdName ) {
	Cmd_AddCommand( cmdName, NULL );
}

/*
=====================
CL_CgameError
=====================
*/
void CL_CgameError( const char *string ) {
	Com_Error( ERR_DROP, "%s", string );
}


/*
=====================
CL_ConfigstringModified
=====================
*/
void CL_ConfigstringModified( void ) {
	char		*old, *s;
	int			i, index;
	char		*dup;
	gameState_t	oldGs;
	int			len;

	index = atoi( Cmd_Argv(1) );
	if ( index < 0 || index >= MAX_CONFIGSTRINGS ) {
		Com_Error( ERR_DROP, "configstring > MAX_CONFIGSTRINGS" );
	}
	// get everything after "cs <num>"
	s = Cmd_ArgsFrom(2);

	old = cl.gameState.stringData + cl.gameState.stringOffsets[ index ];
	if ( !strcmp( old, s ) ) {
		return;		// unchanged
	}

	// build the new gameState_t
	oldGs = cl.gameState;

	Com_Memset( &cl.gameState, 0, sizeof( cl.gameState ) );

	// leave the first 0 for uninitialized strings
	cl.gameState.dataCount = 1;
		
	for ( i = 0 ; i < MAX_CONFIGSTRINGS ; i++ ) {
		if ( i == index ) {
			dup = s;
		} else {
			dup = oldGs.stringData + oldGs.stringOffsets[ i ];
		}
		if ( !dup[0] ) {
			continue;		// leave with the default empty string
		}

		len = strlen( dup );

		if ( len + 1 + cl.gameState.dataCount > MAX_GAMESTATE_CHARS ) {
			Com_Error( ERR_DROP, "MAX_GAMESTATE_CHARS exceeded" );
		}

		// append it to the gameState string buffer
		cl.gameState.stringOffsets[ i ] = cl.gameState.dataCount;
		Com_Memcpy( cl.gameState.stringData + cl.gameState.dataCount, dup, len + 1 );
		cl.gameState.dataCount += len + 1;
	}

	if ( index == CS_SYSTEMINFO ) {
		// parse serverId and other cvars
		CL_SystemInfoChanged();
	}

}


/*
===================
CL_GetServerCommand

Set up argc/argv for the given command
===================
*/
qboolean CL_GetServerCommand( int serverCommandNumber ) {
	char	*s;
	char	*cmd;
	static char bigConfigString[BIG_INFO_STRING];
	int argc;

	// if we have irretrievably lost a reliable command, drop the connection
	if ( serverCommandNumber <= clc.serverCommandSequence - MAX_RELIABLE_COMMANDS ) {
		// when a demo record was started after the client got a whole bunch of
		// reliable commands then the client never got those first reliable commands
		if ( clc.demoplaying )
			return qfalse;
		Com_Error( ERR_DROP, "CL_GetServerCommand: a reliable command was cycled out" );
		return qfalse;
	}

	if ( serverCommandNumber > clc.serverCommandSequence ) {
		Com_Error( ERR_DROP, "CL_GetServerCommand: requested a command not received" );
		return qfalse;
	}

	s = clc.serverCommands[ serverCommandNumber & ( MAX_RELIABLE_COMMANDS - 1 ) ];
	clc.lastExecutedServerCommand = serverCommandNumber;

	Com_DPrintf( "serverCommand: %i : %s\n", serverCommandNumber, s );

rescan:
	Cmd_TokenizeString( s );
	cmd = Cmd_Argv(0);
	argc = Cmd_Argc();

	if ( !strcmp( cmd, "disconnect" ) ) {
		// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=552
		// allow server to indicate why they were disconnected
		if ( argc >= 2 )
			Com_Error (ERR_SERVERDISCONNECT, va( "Server Disconnected - %s", Cmd_Argv( 1 ) ) );
		else
			Com_Error (ERR_SERVERDISCONNECT,"Server disconnected\n");
	}

	if ( !strcmp( cmd, "bcs0" ) ) {
		Com_sprintf( bigConfigString, BIG_INFO_STRING, "cs %s \"%s", Cmd_Argv(1), Cmd_Argv(2) );
		return qfalse;
	}

	if ( !strcmp( cmd, "bcs1" ) ) {
		s = Cmd_Argv(2);
		if( strlen(bigConfigString) + strlen(s) >= BIG_INFO_STRING ) {
			Com_Error( ERR_DROP, "bcs exceeded BIG_INFO_STRING" );
		}
		strcat( bigConfigString, s );
		return qfalse;
	}

	if ( !strcmp( cmd, "bcs2" ) ) {
		s = Cmd_Argv(2);
		if( strlen(bigConfigString) + strlen(s) + 1 >= BIG_INFO_STRING ) {
			Com_Error( ERR_DROP, "bcs exceeded BIG_INFO_STRING" );
		}
		strcat( bigConfigString, s );
		strcat( bigConfigString, "\"" );
		s = bigConfigString;
		goto rescan;
	}

	if ( !strcmp( cmd, "cs" ) ) {
		CL_ConfigstringModified();
		// reparse the string, because CL_ConfigstringModified may have done another Cmd_TokenizeString()
		Cmd_TokenizeString( s );
		return qtrue;
	}

	if ( !strcmp( cmd, "map_restart" ) ) {
		// clear notify lines and outgoing commands before passing
		// the restart to the cgame
		Con_ClearNotify();
		Com_Memset( cl.cmds, 0, sizeof( cl.cmds ) );
		return qtrue;
	}

	// the clientLevelShot command is used during development
	// to generate 128*128 screenshots from the intermission
	// point of levels for the menu system to use
	// we pass it along to the cgame to make apropriate adjustments,
	// but we also clear the console and notify lines here
	if ( !strcmp( cmd, "clientLevelShot" ) ) {
		// don't do it if we aren't running the server locally,
		// otherwise malicious remote servers could overwrite
		// the existing thumbnails
		if ( !com_sv_running->integer ) {
			return qfalse;
		}
		// close the console
		Con_Close();
		// take a special screenshot next frame
		Cbuf_AddText( "wait ; wait ; wait ; wait ; screenshot levelshot\n" );
		return qtrue;
	}

	// we may want to put a "connect to other server" command here

	// cgame can now act on the command
	return qtrue;
}


/*
====================
CL_CM_LoadMap

Just adds default parameters that cgame doesn't need to know about
====================
*/
void CL_CM_LoadMap( const char *mapname ) {
	int		checksum;

	CM_LoadMap( mapname, qtrue, &checksum );
}

/*
====================
CL_ShutdonwCGame

====================
*/
void CL_ShutdownCGame( void ) {
	cls.keyCatchers &= ~KEYCATCH_CGAME;
	cls.cgameStarted = qfalse;
	if ( !cgvm ) {
		return;
	}
	VM_Call( cgvm, CG_SHUTDOWN );
	VM_Free( cgvm );
	cgvm = NULL;
}

static int	FloatAsInt( float f ) {
	int		temp;

	*(float *)&temp = f;

	return temp;
}

/*
====================
CL_CgameSystemCalls

The cgame module is making a system call
====================
*/
intptr_t CL_CgameSystemCalls( intptr_t *args ) {
	switch( args[0] ) {
	case CG_PRINT:
		Com_Printf( "%s", VMA(1) );
		return 0;
	case CG_ERROR:
		Com_Error( ERR_DROP, "%s", VMA(1) );
		return 0;
	case CG_MILLISECONDS:
		return Sys_Milliseconds();
	case CG_CVAR_REGISTER:
		Cvar_Register( VMA(1), VMA(2), VMA(3), args[4] ); 
		return 0;
	case CG_CVAR_UPDATE:
		Cvar_Update( VMA(1) );
		return 0;
	case CG_CVAR_SET:
		Cvar_Set( VMA(1), VMA(2) );
		return 0;
	case CG_CVAR_VARIABLESTRINGBUFFER:
		Cvar_VariableStringBuffer( VMA(1), VMA(2), args[3] );
		return 0;
	case CG_ARGC:
		return Cmd_Argc();
	case CG_ARGV:
		Cmd_ArgvBuffer( args[1], VMA(2), args[3] );
		return 0;
	case CG_ARGS:
		Cmd_ArgsBuffer( VMA(1), args[2] );
		return 0;
	case CG_FS_FOPENFILE:
		return FS_FOpenFileByMode( VMA(1), VMA(2), args[3] );
	case CG_FS_READ:
		FS_Read2( VMA(1), args[2], args[3] );
		return 0;
	case CG_FS_WRITE:
		FS_Write( VMA(1), args[2], args[3] );
		return 0;
	case CG_FS_FCLOSEFILE:
		FS_FCloseFile( args[1] );
		return 0;
	case CG_FS_SEEK:
		return FS_Seek( args[1], args[2], args[3] );
	case CG_SENDCONSOLECOMMAND:
		Cbuf_AddText( VMA(1) );
		return 0;
	case CG_ADDCOMMAND:
		CL_AddCgameCommand( VMA(1) );
		return 0;
	case CG_REMOVECOMMAND:
		Cmd_RemoveCommand( VMA(1) );
		return 0;
	case CG_SENDCLIENTCOMMAND:
		CL_AddReliableCommand( VMA(1) );
		return 0;
	case CG_UPDATESCREEN:
		// this is used during lengthy level loading, so pump message loop
//		Com_EventLoop();	// FIXME: if a server restarts here, BAD THINGS HAPPEN!
// We can't call Com_EventLoop here, a restart will crash and this _does_ happen
// if there is a map change while we are downloading at pk3.
// ZOID
		SCR_UpdateScreen();
		return 0;
	case CG_CM_LOADMAP:
		CL_CM_LoadMap( VMA(1) );
		return 0;
	case CG_CM_NUMINLINEMODELS:
		return CM_NumInlineModels();
	case CG_CM_INLINEMODEL:
		return CM_InlineModel( args[1] );
	case CG_CM_TEMPBOXMODEL:
		return CM_TempBoxModel( VMA(1), VMA(2), /*int capsule*/ qfalse );
	case CG_CM_TEMPCAPSULEMODEL:
		return CM_TempBoxModel( VMA(1), VMA(2), /*int capsule*/ qtrue );
	case CG_CM_POINTCONTENTS:
		return CM_PointContents( VMA(1), args[2] );
	case CG_CM_TRANSFORMEDPOINTCONTENTS:
		return CM_TransformedPointContents( VMA(1), args[2], VMA(3), VMA(4) );
	case CG_CM_BOXTRACE:
		CM_BoxTrace( VMA(1), VMA(2), VMA(3), VMA(4), VMA(5), args[6], args[7], /*int capsule*/ qfalse );
		return 0;
	case CG_CM_CAPSULETRACE:
		CM_BoxTrace( VMA(1), VMA(2), VMA(3), VMA(4), VMA(5), args[6], args[7], /*int capsule*/ qtrue );
		return 0;
	case CG_CM_TRANSFORMEDBOXTRACE:
		CM_TransformedBoxTrace( VMA(1), VMA(2), VMA(3), VMA(4), VMA(5), args[6], args[7], VMA(8), VMA(9), /*int capsule*/ qfalse );
		return 0;
	case CG_CM_TRANSFORMEDCAPSULETRACE:
		CM_TransformedBoxTrace( VMA(1), VMA(2), VMA(3), VMA(4), VMA(5), args[6], args[7], VMA(8), VMA(9), /*int capsule*/ qtrue );
		return 0;
	case CG_CM_MARKFRAGMENTS:
		return re.MarkFragments( args[1], VMA(2), VMA(3), args[4], VMA(5), args[6], VMA(7) );
	case CG_S_STARTSOUND:
		S_StartSound( VMA(1), args[2], args[3], args[4] );
		return 0;
	case CG_S_STARTLOCALSOUND:
		S_StartLocalSound( args[1], args[2] );
		return 0;
	case CG_S_CLEARLOOPINGSOUNDS:
		S_ClearLoopingSounds(args[1]);
		return 0;
	case CG_S_ADDLOOPINGSOUND:
		S_AddLoopingSound( args[1], VMA(2), VMA(3), args[4] );
		return 0;
	case CG_S_ADDREALLOOPINGSOUND:
		S_AddRealLoopingSound( args[1], VMA(2), VMA(3), args[4] );
		return 0;
	case CG_S_STOPLOOPINGSOUND:
		S_StopLoopingSound( args[1] );
		return 0;
	case CG_S_UPDATEENTITYPOSITION:
		S_UpdateEntityPosition( args[1], VMA(2) );
		return 0;
	case CG_S_RESPATIALIZE:
		S_Respatialize( args[1], VMA(2), VMA(3), args[4] );
		return 0;
	case CG_S_REGISTERSOUND:
		return S_RegisterSound( VMA(1), args[2] );
	case CG_S_STARTBACKGROUNDTRACK:
		S_StartBackgroundTrack( VMA(1), VMA(2) );
		return 0;
	case CG_R_LOADWORLDMAP:
		re.LoadWorld( VMA(1) );
		return 0; 
	case CG_R_REGISTERMODEL:
		return re.RegisterModel( VMA(1) );
	case CG_R_REGISTERSKIN:
		return re.RegisterSkin( VMA(1) );
	case CG_R_REGISTERSHADER:
		return re.RegisterShader( VMA(1) );
	case CG_R_REGISTERSHADERNOMIP:
		return re.RegisterShaderNoMip( VMA(1) );
	case CG_R_REGISTERFONT:
		re.RegisterFont( VMA(1), args[2], VMA(3));
	case CG_R_CLEARSCENE:
		re.ClearScene();
		return 0;
	case CG_R_ADDREFENTITYTOSCENE:
		re.AddRefEntityToScene( VMA(1) );
		return 0;
	case CG_R_ADDPOLYTOSCENE:
		re.AddPolyToScene( args[1], args[2], VMA(3), 1 );
		return 0;
	case CG_R_ADDPOLYSTOSCENE:
		re.AddPolyToScene( args[1], args[2], VMA(3), args[4] );
		return 0;
	case CG_R_LIGHTFORPOINT:
		return re.LightForPoint( VMA(1), VMA(2), VMA(3), VMA(4) );
	case CG_R_ADDLIGHTTOSCENE:
		re.AddLightToScene( VMA(1), VMF(2), VMF(3), VMF(4), VMF(5) );
		return 0;
	case CG_R_ADDADDITIVELIGHTTOSCENE:
		re.AddAdditiveLightToScene( VMA(1), VMF(2), VMF(3), VMF(4), VMF(5) );
		return 0;
	case CG_R_RENDERSCENE:
		re.RenderScene( VMA(1) );
		return 0;
	case CG_R_SETCOLOR:
		re.SetColor( VMA(1) );
		return 0;
	case CG_R_DRAWSTRETCHPIC:
		re.DrawStretchPic( VMF(1), VMF(2), VMF(3), VMF(4), VMF(5), VMF(6), VMF(7), VMF(8), args[9] );
		return 0;
	case CG_R_MODELBOUNDS:
		re.ModelBounds( args[1], VMA(2), VMA(3) );
		return 0;
	case CG_R_LERPTAG:
		return re.LerpTag( VMA(1), args[2], args[3], args[4], VMF(5), VMA(6) );
	case CG_GETGLCONFIG:
		CL_GetGlconfig( VMA(1) );
		return 0;
	case CG_GETGAMESTATE:
		CL_GetGameState( VMA(1) );
		return 0;
	case CG_GETCURRENTSNAPSHOTNUMBER:
		CL_GetCurrentSnapshotNumber( VMA(1), VMA(2) );
		return 0;
	case CG_GETSNAPSHOT:
		return CL_GetSnapshot( args[1], VMA(2) );
	case CG_GETSERVERCOMMAND:
		return CL_GetServerCommand( args[1] );
	case CG_GETCURRENTCMDNUMBER:
		return CL_GetCurrentCmdNumber();
	case CG_GETUSERCMD:
		return CL_GetUserCmd( args[1], VMA(2) );
	case CG_SETUSERCMDVALUE:
		CL_SetUserCmdValue( args[1], VMF(2) );
		return 0;
	case CG_MEMORY_REMAINING:
		return Hunk_MemoryRemaining();
  case CG_KEY_ISDOWN:
		return Key_IsDown( args[1] );
  case CG_KEY_GETCATCHER:
		return Key_GetCatcher();
  case CG_KEY_SETCATCHER:
		Key_SetCatcher( args[1] );
    return 0;
  case CG_KEY_GETKEY:
		return Key_GetKey( VMA(1) );



	case CG_MEMSET:
		Com_Memset( VMA(1), args[2], args[3] );
		return 0;
	case CG_MEMCPY:
		Com_Memcpy( VMA(1), VMA(2), args[3] );
		return 0;
	case CG_STRNCPY:
		strncpy( VMA(1), VMA(2), args[3] );
		return args[1];
	case CG_SIN:
		return FloatAsInt( sin( VMF(1) ) );
	case CG_COS:
		return FloatAsInt( cos( VMF(1) ) );
	case CG_ATAN2:
		return FloatAsInt( atan2( VMF(1), VMF(2) ) );
	case CG_SQRT:
		return FloatAsInt( sqrt( VMF(1) ) );
	case CG_FLOOR:
		return FloatAsInt( floor( VMF(1) ) );
	case CG_CEIL:
		return FloatAsInt( ceil( VMF(1) ) );
	case CG_ACOS:
		return FloatAsInt( Q_acos( VMF(1) ) );

	case CG_PC_ADD_GLOBAL_DEFINE:
		return botlib_export->PC_AddGlobalDefine( VMA(1) );
	case CG_PC_LOAD_SOURCE:
		return botlib_export->PC_LoadSourceHandle( VMA(1) );
	case CG_PC_FREE_SOURCE:
		return botlib_export->PC_FreeSourceHandle( args[1] );
	case CG_PC_READ_TOKEN:
		return botlib_export->PC_ReadTokenHandle( args[1], VMA(2) );
	case CG_PC_SOURCE_FILE_AND_LINE:
		return botlib_export->PC_SourceFileAndLine( args[1], VMA(2), VMA(3) );

	case CG_S_STOPBACKGROUNDTRACK:
		S_StopBackgroundTrack();
		return 0;

	case CG_REAL_TIME:
		return Com_RealTime( VMA(1) );
	case CG_SNAPVECTOR:
		Sys_SnapVector( VMA(1) );
		return 0;

	case CG_CIN_PLAYCINEMATIC:
	  return CIN_PlayCinematic(VMA(1), args[2], args[3], args[4], args[5], args[6]);

	case CG_CIN_STOPCINEMATIC:
	  return CIN_StopCinematic(args[1]);

	case CG_CIN_RUNCINEMATIC:
	  return CIN_RunCinematic(args[1]);

	case CG_CIN_DRAWCINEMATIC:
	  CIN_DrawCinematic(args[1]);
	  return 0;

	case CG_CIN_SETEXTENTS:
	  CIN_SetExtents(args[1], args[2], args[3], args[4], args[5]);
	  return 0;

	case CG_R_REMAP_SHADER:
		re.RemapShader( VMA(1), VMA(2), VMA(3) );
		return 0;

/*
	case CG_LOADCAMERA:
		return loadCamera(VMA(1));

	case CG_STARTCAMERA:
		startCamera(args[1]);
		return 0;

	case CG_GETCAMERAINFO:
		return getCameraInfo(args[1], VMA(2), VMA(3));
*/
	case CG_GET_ENTITY_TOKEN:
		return re.GetEntityToken( VMA(1), args[2] );
	case CG_R_INPVS:
		return re.inPVS( VMA(1), VMA(2) );

	default:
	        assert(0); // bk010102
		Com_Error( ERR_DROP, "Bad cgame system trap: %i", args[0] );
	}
	return 0;
}


/*
====================
CL_InitCGame

Should only be called by CL_StartHunkUsers
====================
*/
void CL_InitCGame( void ) {
	const char			*info;
	const char			*mapname;
	int					t1, t2;
	vmInterpret_t		interpret;

	t1 = Sys_Milliseconds();

	// put away the console
	Con_Close();

	// find the current mapname
	info = cl.gameState.stringData + cl.gameState.stringOffsets[ CS_SERVERINFO ];
	mapname = Info_ValueForKey( info, "mapname" );
	Com_sprintf( cl.mapname, sizeof( cl.mapname ), "maps/%s.bsp", mapname );

	// load the dll or bytecode
	if ( cl_connectedToPureServer != 0 ) {
		// if sv_pure is set we only allow qvms to be loaded
		interpret = VMI_COMPILED;
	}
	else {
		interpret = Cvar_VariableValue( "vm_cgame" );
	}
	cgvm = VM_Create( "cgame", CL_CgameSystemCalls, interpret );
	if ( !cgvm ) {
		Com_Error( ERR_DROP, "VM_Create on cgame failed" );
	}
	cls.state = CA_LOADING;

	// init for this gamestate
	// use the lastExecutedServerCommand instead of the serverCommandSequence
	// otherwise server commands sent just before a gamestate are dropped
	VM_Call( cgvm, CG_INIT, clc.serverMessageSequence, clc.lastExecutedServerCommand, clc.clientNum );

	// we will send a usercmd this frame, which
	// will cause the server to send us the first snapshot
	cls.state = CA_PRIMED;

	t2 = Sys_Milliseconds();

	Com_Printf( "CL_InitCGame: %5.2f seconds\n", (t2-t1)/1000.0 );

	// have the renderer touch all its images, so they are present
	// on the card even if the driver does deferred loading
	re.EndRegistration();

	// make sure everything is paged in
	if (!Sys_LowPhysicalMemory()) {
		Com_TouchMemory();
	}

	// clear anything that got printed
	Con_ClearNotify ();
}


/*
====================
CL_GameCommand

See if the current console command is claimed by the cgame
====================
*/
qboolean CL_GameCommand( void ) {
	if ( !cgvm ) {
		return qfalse;
	}

	return VM_Call( cgvm, CG_CONSOLE_COMMAND );
}



/*
=====================
CL_CGameRendering
=====================
*/
void CL_CGameRendering( stereoFrame_t stereo ) {
	VM_Call( cgvm, CG_DRAW_ACTIVE_FRAME, cl.serverTime, stereo, clc.demoplaying );
	VM_Debug( 0 );
}


/*
=================
CL_AdjustTimeDelta

Adjust the clients view of server time.

We attempt to have cl.serverTime exactly equal the server's view
of time plus the timeNudge, but with variable latencies over
the internet it will often need to drift a bit to match conditions.

Our ideal time would be to have the adjusted time approach, but not pass,
the very latest snapshot.

Adjustments are only made when a new snapshot arrives with a rational
latency, which keeps the adjustment process framerate independent and
prevents massive overadjustment during times of significant packet loss
or bursted delayed packets.
=================
*/

#define	RESET_TIME	500

void CL_AdjustTimeDelta( void ) {
	int		resetTime;
	int		newDelta;
	int		deltaDelta;

	cl.newSnapshots = qfalse;

	// the delta never drifts when replaying a demo
	if ( clc.demoplaying ) {
		return;
	}

	// if the current time is WAY off, just correct to the current value
	if ( com_sv_running->integer ) {
		resetTime = 100;
	} else {
		resetTime = RESET_TIME;
	}

	newDelta = cl.snap.serverTime - cls.realtime;
	deltaDelta = abs( newDelta - cl.serverTimeDelta );

	if ( deltaDelta > RESET_TIME ) {
		cl.serverTimeDelta = newDelta;
		cl.oldServerTime = cl.snap.serverTime;	// FIXME: is this a problem for cgame?
		cl.serverTime = cl.snap.serverTime;
		if ( cl_showTimeDelta->integer ) {
			Com_Printf( "<RESET> " );
		}
	} else if ( deltaDelta > 100 ) {
		// fast adjust, cut the difference in half
		if ( cl_showTimeDelta->integer ) {
			Com_Printf( "<FAST> " );
		}
		cl.serverTimeDelta = ( cl.serverTimeDelta + newDelta ) >> 1;
	} else {
		// slow drift adjust, only move 1 or 2 msec

		// if any of the frames between this and the previous snapshot
		// had to be extrapolated, nudge our sense of time back a little
		// the granularity of +1 / -2 is too high for timescale modified frametimes
		if ( com_timescale->value == 0 || com_timescale->value == 1 ) {
			if ( cl.extrapolatedSnapshot ) {
				cl.extrapolatedSnapshot = qfalse;
				cl.serverTimeDelta -= 2;
			} else {
				// otherwise, move our sense of time forward to minimize total latency
				cl.serverTimeDelta++;
			}
		}
	}

	if ( cl_showTimeDelta->integer ) {
		Com_Printf( "%i ", cl.serverTimeDelta );
	}
}


/*
==================
CL_FirstSnapshot
==================
*/
void CL_FirstSnapshot( void ) {
	// ignore snapshots that don't have entities
	if ( cl.snap.snapFlags & SNAPFLAG_NOT_ACTIVE ) {
		return;
	}
	cls.state = CA_ACTIVE;

	// set the timedelta so we are exactly on this first frame
	cl.serverTimeDelta = cl.snap.serverTime - cls.realtime;
	cl.oldServerTime = cl.snap.serverTime;

	clc.timeDemoBaseTime = cl.snap.serverTime;

	// if this is the first frame of active play,
	// execute the contents of activeAction now
	// this is to allow scripting a timedemo to start right
	// after loading
	if ( cl_activeAction->string[0] ) {
		Cbuf_AddText( cl_activeAction->string );
		Cvar_Set( "activeAction", "" );
	}
	
	Sys_BeginProfiling();
}

/*
==================
CL_SetCGameTime
==================
*/
void CL_SetCGameTime( void ) {
	// getting a valid frame message ends the connection process
	if ( cls.state != CA_ACTIVE ) {
		if ( cls.state != CA_PRIMED ) {
			return;
		}
		if ( clc.demoplaying ) {
			// we shouldn't get the first snapshot on the same frame
			// as the gamestate, because it causes a bad time skip
			if ( !clc.firstDemoFrameSkipped ) {
				clc.firstDemoFrameSkipped = qtrue;
				return;
			}
			CL_ReadDemoMessage();
		}
		if ( cl.newSnapshots ) {
			cl.newSnapshots = qfalse;
			CL_FirstSnapshot();
		}
		if ( cls.state != CA_ACTIVE ) {
			return;
		}
	}	

	// if we have gotten to this point, cl.snap is guaranteed to be valid
	if ( !cl.snap.valid ) {
		Com_Error( ERR_DROP, "CL_SetCGameTime: !cl.snap.valid" );
	}

	// allow pause in single player
	if ( sv_paused->integer && cl_paused->integer && com_sv_running->integer ) {
		// paused
		return;
	}

	if ( cl.snap.serverTime < cl.oldFrameServerTime ) {
		Com_Error( ERR_DROP, "cl.snap.serverTime < cl.oldFrameServerTime" );
	}
	cl.oldFrameServerTime = cl.snap.serverTime;


	// get our current view of time

	if ( clc.demoplaying && cl_freezeDemo->integer ) {
		// cl_freezeDemo is used to lock a demo in place for single frame advances

	} else {
		// cl_timeNudge is a user adjustable cvar that allows more
		// or less latency to be added in the interest of better 
		// smoothness or better responsiveness.
		int tn;
		
		tn = cl_timeNudge->integer;
		if (tn<-30) {
			tn = -30;
		} else if (tn>30) {
			tn = 30;
		}

		cl.serverTime = cls.realtime + cl.serverTimeDelta - tn;

		// guarantee that time will never flow backwards, even if
		// serverTimeDelta made an adjustment or cl_timeNudge was changed
		if ( cl.serverTime < cl.oldServerTime ) {
			cl.serverTime = cl.oldServerTime;
		}
		cl.oldServerTime = cl.serverTime;

		// note if we are almost past the latest frame (without timeNudge),
		// so we will try and adjust back a bit when the next snapshot arrives
		if ( cls.realtime + cl.serverTimeDelta >= cl.snap.serverTime - 5 ) {
			cl.extrapolatedSnapshot = qtrue;
		}
	}

	// if we have gotten new snapshots, drift serverTimeDelta
	// don't do this every frame, or a period of packet loss would
	// make a huge adjustment
	if ( cl.newSnapshots ) {
		CL_AdjustTimeDelta();
	}

	if ( !clc.demoplaying ) {
		return;
	}

	// if we are playing a demo back, we can just keep reading
	// messages from the demo file until the cgame definately
	// has valid snapshots to interpolate between

	// a timedemo will always use a deterministic set of time samples
	// no matter what speed machine it is run on,
	// while a normal demo may have different time samples
	// each time it is played back
	if ( cl_timedemo->integer ) {
		if (!clc.timeDemoStart) {
			clc.timeDemoStart = Sys_Milliseconds();
		}
		clc.timeDemoFrames++;
		cl.serverTime = clc.timeDemoBaseTime + clc.timeDemoFrames * 50;
	}

	while ( cl.serverTime >= cl.snap.serverTime ) {
		// feed another messag, which should change
		// the contents of cl.snap
		CL_ReadDemoMessage();
		if ( cls.state != CA_ACTIVE ) {
			return;		// end of demo
		}
	}

}