csqc packet log code (for entityframedatabase 5 only, i.e. DP5 and higher)
[divverent/darkplaces.git] / protocol.c
1 #include "quakedef.h"
2
3 #define ENTITYSIZEPROFILING_START(msg, num) \
4         int entityprofiling_startsize = msg->cursize
5
6 #define ENTITYSIZEPROFILING_END(msg, num) \
7         if(developer_networkentities.integer >= 2) \
8         { \
9                 prvm_edict_t *ed = prog->edicts + num; \
10                 const char *cname = "(no classname)"; \
11                 if(prog->fieldoffsets.classname >= 0) \
12                 { \
13                         string_t handle =  PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.classname)->string; \
14                         if (handle) \
15                                 cname = PRVM_GetString(handle); \
16                 } \
17                 Con_Printf("sent entity update of size %d for a %s\n", (msg->cursize - entityprofiling_startsize), cname); \
18         }
19
20 // this is 88 bytes (must match entity_state_t in protocol.h)
21 entity_state_t defaultstate =
22 {
23         // ! means this is not sent to client
24         0,//double time; // ! time this state was built (used on client for interpolation)
25         {0,0,0},//float netcenter[3]; // ! for network prioritization, this is the center of the bounding box (which may differ from the origin)
26         {0,0,0},//float origin[3];
27         {0,0,0},//float angles[3];
28         0,//int effects;
29         0,//unsigned int customizeentityforclient; // !
30         0,//unsigned short number; // entity number this state is for
31         0,//unsigned short modelindex;
32         0,//unsigned short frame;
33         0,//unsigned short tagentity;
34         0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
35         0,//unsigned short viewmodelforclient; // !
36         0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
37         0,//unsigned short nodrawtoclient; // !
38         0,//unsigned short drawonlytoclient; // !
39         {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
40         0,//unsigned char active; // true if a valid state
41         0,//unsigned char lightstyle;
42         0,//unsigned char lightpflags;
43         0,//unsigned char colormap;
44         0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
45         255,//unsigned char alpha;
46         16,//unsigned char scale;
47         0,//unsigned char glowsize;
48         254,//unsigned char glowcolor;
49         0,//unsigned char flags;
50         0,//unsigned char internaleffects; // INTEF_FLAG1QW and so on
51         0,//unsigned char tagindex;
52         {32, 32, 32},//unsigned char colormod[3];
53         // padding to a multiple of 8 bytes (to align the double time)
54         {0,0,0,0,0}//unsigned char unused[5]; // !
55 };
56
57 // LordHavoc: I own protocol ranges 96, 97, 3500-3599
58
59 struct protocolversioninfo_s
60 {
61         int number;
62         const char *name;
63 }
64 protocolversioninfo[] =
65 {
66         {0, "UNKNOWN"},
67         {3504, "DP7"},
68         {3503, "DP6"},
69         {3502, "DP5"},
70         {3501, "DP4"},
71         {3500, "DP3"},
72         {97, "DP2"},
73         {96, "DP1"},
74         {15, "QUAKEDP"},
75         {250, "NEHAHRAMOVIE"},
76         {15, "QUAKE"},
77         {28, "QW"},
78         {10000, "NEHAHRABJP"},
79         {10001, "NEHAHRABJP2"},
80         {10002, "NEHAHRABJP3"},
81         {0, NULL}
82 };
83
84 protocolversion_t Protocol_EnumForName(const char *s)
85 {
86         int i;
87         for (i = 1;protocolversioninfo[i].name;i++)
88                 if (!strcasecmp(s, protocolversioninfo[i].name))
89                         return (protocolversion_t)i;
90         return PROTOCOL_UNKNOWN;
91 }
92
93 const char *Protocol_NameForEnum(protocolversion_t p)
94 {
95         return protocolversioninfo[p].name;
96 }
97
98 protocolversion_t Protocol_EnumForNumber(int n)
99 {
100         int i;
101         for (i = 1;protocolversioninfo[i].name;i++)
102                 if (protocolversioninfo[i].number == n)
103                         return (protocolversion_t)i;
104         return PROTOCOL_UNKNOWN;
105 }
106
107 int Protocol_NumberForEnum(protocolversion_t p)
108 {
109         return protocolversioninfo[p].number;
110 }
111
112 void Protocol_Names(char *buffer, size_t buffersize)
113 {
114         int i;
115         if (buffersize < 1)
116                 return;
117         buffer[0] = 0;
118         for (i = 1;protocolversioninfo[i].name;i++)
119         {
120                 if (i > 1)
121                         strlcat(buffer, " ", buffersize);
122                 strlcat(buffer, protocolversioninfo[i].name, buffersize);
123         }
124 }
125
126 void EntityFrameQuake_ReadEntity(int bits)
127 {
128         int num;
129         entity_t *ent;
130         entity_state_t s;
131
132         if (bits & U_MOREBITS)
133                 bits |= (MSG_ReadByte()<<8);
134         if ((bits & U_EXTEND1) && cls.protocol != PROTOCOL_NEHAHRAMOVIE)
135         {
136                 bits |= MSG_ReadByte() << 16;
137                 if (bits & U_EXTEND2)
138                         bits |= MSG_ReadByte() << 24;
139         }
140
141         if (bits & U_LONGENTITY)
142                 num = (unsigned short) MSG_ReadShort ();
143         else
144                 num = MSG_ReadByte ();
145
146         if (num >= MAX_EDICTS)
147                 Host_Error("EntityFrameQuake_ReadEntity: entity number (%i) >= MAX_EDICTS (%i)", num, MAX_EDICTS);
148         if (num < 1)
149                 Host_Error("EntityFrameQuake_ReadEntity: invalid entity number (%i)", num);
150
151         if (cl.num_entities <= num)
152         {
153                 cl.num_entities = num + 1;
154                 if (num >= cl.max_entities)
155                         CL_ExpandEntities(num);
156         }
157
158         ent = cl.entities + num;
159
160         // note: this inherits the 'active' state of the baseline chosen
161         // (state_baseline is always active, state_current may not be active if
162         // the entity was missing in the last frame)
163         if (bits & U_DELTA)
164                 s = ent->state_current;
165         else
166         {
167                 s = ent->state_baseline;
168                 s.active = true;
169         }
170
171         cl.isquakeentity[num] = true;
172         if (cl.lastquakeentity < num)
173                 cl.lastquakeentity = num;
174         s.number = num;
175         s.time = cl.mtime[0];
176         s.flags = 0;
177         if (bits & U_MODEL)
178         {
179                 if (cls.protocol == PROTOCOL_NEHAHRABJP || cls.protocol == PROTOCOL_NEHAHRABJP2 || cls.protocol == PROTOCOL_NEHAHRABJP3)
180                                                         s.modelindex = (unsigned short) MSG_ReadShort();
181                 else
182                                                         s.modelindex = (s.modelindex & 0xFF00) | MSG_ReadByte();
183         }
184         if (bits & U_FRAME)             s.frame = (s.frame & 0xFF00) | MSG_ReadByte();
185         if (bits & U_COLORMAP)  s.colormap = MSG_ReadByte();
186         if (bits & U_SKIN)              s.skin = MSG_ReadByte();
187         if (bits & U_EFFECTS)   s.effects = (s.effects & 0xFF00) | MSG_ReadByte();
188         if (bits & U_ORIGIN1)   s.origin[0] = MSG_ReadCoord(cls.protocol);
189         if (bits & U_ANGLE1)    s.angles[0] = MSG_ReadAngle(cls.protocol);
190         if (bits & U_ORIGIN2)   s.origin[1] = MSG_ReadCoord(cls.protocol);
191         if (bits & U_ANGLE2)    s.angles[1] = MSG_ReadAngle(cls.protocol);
192         if (bits & U_ORIGIN3)   s.origin[2] = MSG_ReadCoord(cls.protocol);
193         if (bits & U_ANGLE3)    s.angles[2] = MSG_ReadAngle(cls.protocol);
194         if (bits & U_STEP)              s.flags |= RENDER_STEP;
195         if (bits & U_ALPHA)             s.alpha = MSG_ReadByte();
196         if (bits & U_SCALE)             s.scale = MSG_ReadByte();
197         if (bits & U_EFFECTS2)  s.effects = (s.effects & 0x00FF) | (MSG_ReadByte() << 8);
198         if (bits & U_GLOWSIZE)  s.glowsize = MSG_ReadByte();
199         if (bits & U_GLOWCOLOR) s.glowcolor = MSG_ReadByte();
200         if (bits & U_COLORMOD)  {int c = MSG_ReadByte();s.colormod[0] = (unsigned char)(((c >> 5) & 7) * (32.0f / 7.0f));s.colormod[1] = (unsigned char)(((c >> 2) & 7) * (32.0f / 7.0f));s.colormod[2] = (unsigned char)((c & 3) * (32.0f / 3.0f));}
201         if (bits & U_GLOWTRAIL) s.flags |= RENDER_GLOWTRAIL;
202         if (bits & U_FRAME2)    s.frame = (s.frame & 0x00FF) | (MSG_ReadByte() << 8);
203         if (bits & U_MODEL2)    s.modelindex = (s.modelindex & 0x00FF) | (MSG_ReadByte() << 8);
204         if (bits & U_VIEWMODEL) s.flags |= RENDER_VIEWMODEL;
205         if (bits & U_EXTERIORMODEL)     s.flags |= RENDER_EXTERIORMODEL;
206
207         // LordHavoc: to allow playback of the Nehahra movie
208         if (cls.protocol == PROTOCOL_NEHAHRAMOVIE && (bits & U_EXTEND1))
209         {
210                 // LordHavoc: evil format
211                 int i = (int)MSG_ReadFloat();
212                 int j = (int)(MSG_ReadFloat() * 255.0f);
213                 if (i == 2)
214                 {
215                         i = (int)MSG_ReadFloat();
216                         if (i)
217                                 s.effects |= EF_FULLBRIGHT;
218                 }
219                 if (j < 0)
220                         s.alpha = 0;
221                 else if (j == 0 || j >= 255)
222                         s.alpha = 255;
223                 else
224                         s.alpha = j;
225         }
226
227         ent->state_previous = ent->state_current;
228         ent->state_current = s;
229         if (ent->state_current.active)
230         {
231                 CL_MoveLerpEntityStates(ent);
232                 cl.entities_active[ent->state_current.number] = true;
233         }
234
235         if (msg_badread)
236                 Host_Error("EntityFrameQuake_ReadEntity: read error");
237 }
238
239 void EntityFrameQuake_ISeeDeadEntities(void)
240 {
241         int num, lastentity;
242         if (cl.lastquakeentity == 0)
243                 return;
244         lastentity = cl.lastquakeentity;
245         cl.lastquakeentity = 0;
246         for (num = 0;num <= lastentity;num++)
247         {
248                 if (cl.isquakeentity[num])
249                 {
250                         if (cl.entities_active[num] && cl.entities[num].state_current.time == cl.mtime[0])
251                         {
252                                 cl.isquakeentity[num] = true;
253                                 cl.lastquakeentity = num;
254                         }
255                         else
256                         {
257                                 cl.isquakeentity[num] = false;
258                                 cl.entities_active[num] = false;
259                                 cl.entities[num].state_current = defaultstate;
260                                 cl.entities[num].state_current.number = num;
261                         }
262                 }
263         }
264 }
265
266 // NOTE: this only works with DP5 protocol and upwards. For lower protocols
267 // (including QUAKE), no packet loss handling for CSQC is done, which makes
268 // CSQC basically useless.
269 // Always use the DP5 protocol, or a higher one, when using CSQC entities.
270 static void EntityFrameCSQC_LostAllFrames(client_t *client)
271 {
272         // mark ALL csqc entities as requiring a FULL resend!
273         // I know this is a bad workaround, but better than nothing.
274         int i, n;
275         prvm_eval_t *val;
276         prvm_edict_t *ed;
277
278         if(prog->fieldoffsets.SendEntity < 0 || prog->fieldoffsets.Version < 0)
279                 return;
280
281         n = client->csqcnumedicts;
282         for(i = 0; i < n; ++i)
283         {
284                 if(client->csqcentityglobalhistory[i])
285                 {
286                         ed = prog->edicts + i;
287                         val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.SendEntity);
288                         if (val->function)
289                                 client->csqcentitysendflags[i] |= 0xFFFFFF; // FULL RESEND
290                         else // if it was ever sent to that client as a CSQC entity
291                         {
292                                 client->csqcentityscope[i] = 1; // REMOVE
293                                 client->csqcentitysendflags[i] |= 0xFFFFFF;
294                         }
295                 }
296         }
297 }
298 void EntityFrameCSQC_LostFrame(client_t *client, int framenum)
299 {
300         // marks a frame as lost
301         int i, j, n;
302         qboolean valid;
303         int ringfirst, ringlast;
304         int recoversendflags[MAX_EDICTS];
305         csqcentityframedb_t *d;
306
307         n = client->csqcnumedicts;
308
309         // is our frame out of history?
310         ringfirst = client->csqcentityframehistory_next; // oldest entry
311         ringlast = (ringfirst + NUM_CSQCENTITYDB_FRAMES - 1) % NUM_CSQCENTITYDB_FRAMES; // most recently added entry
312
313         valid = false;
314         
315         for(j = 0; j < NUM_CSQCENTITYDB_FRAMES; ++j)
316         {
317                 d = &client->csqcentityframehistory[(ringfirst + j) % NUM_CSQCENTITYDB_FRAMES];
318                 if(d->framenum < 0)
319                         continue;
320                 if(d->framenum == framenum)
321                         break;
322                 else if(d->framenum < framenum)
323                         valid = true;
324         }
325         if(j == NUM_CSQCENTITYDB_FRAMES)
326         {
327                 if(valid) // got beaten, i.e. there is a frame < framenum
328                 {
329                         // a non-csqc frame got lost... great
330                         return;
331                 }
332                 else
333                 {
334                         // a too old frame got lost... sorry, cannot handle this
335                         Con_DPrintf("CSQC entity DB: lost a frame too early to do any handling (resending ALL)...\n");
336                         Con_DPrintf("Lost frame = %d\n", framenum);
337                         Con_DPrintf("Entity DB = %d to %d\n", client->csqcentityframehistory[ringfirst].framenum, client->csqcentityframehistory[ringlast].framenum);
338                         EntityFrameCSQC_LostAllFrames(client);
339                 }
340                 return;
341         }
342
343         // so j is the frame that got lost
344         // ringlast is the frame that we have to go to
345         ringfirst = (ringfirst + j) % NUM_CSQCENTITYDB_FRAMES;
346         if(ringlast < ringfirst)
347                 ringlast += NUM_CSQCENTITYDB_FRAMES;
348         
349         memset(recoversendflags, 0, sizeof(recoversendflags));
350
351         for(j = ringfirst; j <= ringlast; ++j)
352         {
353                 d = &client->csqcentityframehistory[j % NUM_CSQCENTITYDB_FRAMES];
354                 if(d->framenum < 0)
355                 {
356                         // deleted frame
357                 }
358                 else if(d->framenum < framenum)
359                 {
360                         // a frame in the past... should never happen
361                         Con_Printf("CSQC entity DB encountered a frame from the past when recovering from PL...?\n");
362                 }
363                 else if(d->framenum == framenum)
364                 {
365                         // handling the actually lost frame now
366                         for(i = 0; i < d->num; ++i)
367                         {
368                                 int sf = d->sendflags[i];
369                                 int ent = d->entno[i];
370                                 if(sf < 0) // remove
371                                         recoversendflags[ent] |= -1; // all bits, including sign
372                                 else if(sf > 0)
373                                         recoversendflags[ent] |= sf;
374                         }
375                 }
376                 else
377                 {
378                         // handling the frames that followed it now
379                         for(i = 0; i < d->num; ++i)
380                         {
381                                 int sf = d->sendflags[i];
382                                 int ent = d->entno[i];
383                                 if(sf < 0) // remove
384                                 {
385                                         recoversendflags[ent] = 0; // no need to update, we got a more recent remove (and will fix it THEN)
386                                         break; // no flags left to remove...
387                                 }
388                                 else if(sf > 0)
389                                         recoversendflags[ent] &= ~sf; // no need to update these bits, we already got them later
390                         }
391                 }
392         }
393
394         for(i = 0; i < client->csqcnumedicts; ++i)
395         {
396                 if(recoversendflags[i] < 0)
397                 {
398                         // a remove got lost, then either send a remove or - if it was
399                         // recreated later - a FULL update to make totally sure
400                         client->csqcentityscope[i] = 1;
401                         client->csqcentitysendflags[i] = 0xFFFFFF;
402                 }
403                 else
404                         client->csqcentitysendflags[i] |= recoversendflags[i];
405         }
406 }
407 static int EntityFrameCSQC_AllocFrame(client_t *client, int framenum)
408 {
409         int ringfirst = client->csqcentityframehistory_next; // oldest entry
410         client->csqcentityframehistory_next += 1;
411         client->csqcentityframehistory_next %= NUM_CSQCENTITYDB_FRAMES;
412         client->csqcentityframehistory[ringfirst].framenum = framenum;
413         client->csqcentityframehistory[ringfirst].num = 0;
414         return ringfirst;
415 }
416 static void EntityFrameCSQC_DeallocFrame(client_t *client, int framenum)
417 {
418         int ringfirst = client->csqcentityframehistory_next; // oldest entry
419         int ringlast = (ringfirst + NUM_CSQCENTITYDB_FRAMES - 1) % NUM_CSQCENTITYDB_FRAMES; // most recently added entry
420         if(framenum == client->csqcentityframehistory[ringlast].framenum)
421         {
422                 client->csqcentityframehistory[ringlast].framenum = -1;
423                 client->csqcentityframehistory[ringlast].num = 0;
424                 client->csqcentityframehistory_next = ringlast;
425         }
426         else
427                 Con_Printf("Trying to dealloc the wrong entity frame\n");
428 }
429
430 //[515]: we use only one array per-client for SendEntity feature
431 // TODO: add some handling for entity send priorities, to better deal with huge
432 // amounts of csqc networked entities
433 void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, const entity_state_t *states, int framenum)
434 {
435         int num, number, end, sendflags;
436         qboolean sectionstarted = false;
437         const entity_state_t *n;
438         prvm_edict_t *ed;
439         prvm_eval_t *val;
440         client_t *client = svs.clients + sv.writeentitiestoclient_clientnumber;
441         int dbframe = EntityFrameCSQC_AllocFrame(client, framenum);
442         csqcentityframedb_t *db = &client->csqcentityframehistory[dbframe];
443
444         maxsize -= 24; // always fit in an empty svc_entities message (for packet loss detection!)
445
446         // if this server progs is not CSQC-aware, return early
447         if(prog->fieldoffsets.SendEntity < 0 || prog->fieldoffsets.Version < 0)
448                 return;
449
450         // make sure there is enough room to store the svc_csqcentities byte,
451         // the terminator (0x0000) and at least one entity update
452         if (msg->cursize + 32 >= maxsize)
453                 return;
454
455         if (client->csqcnumedicts < prog->num_edicts)
456                 client->csqcnumedicts = prog->num_edicts;
457
458         number = 1;
459         for (num = 0, n = states;num < numstates;num++, n++)
460         {
461                 end = n->number;
462                 for (;number < end;number++)
463                 {
464                         if (client->csqcentityscope[number])
465                         {
466                                 client->csqcentityscope[number] = 1;
467                                 client->csqcentitysendflags[number] = 0xFFFFFF;
468                         }
469                 }
470                 ed = prog->edicts + number;
471                 val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.SendEntity);
472                 if (val->function)
473                         client->csqcentityscope[number] = 2;
474                 else if (client->csqcentityscope[number])
475                 {
476                         client->csqcentityscope[number] = 1;
477                         client->csqcentitysendflags[number] = 0xFFFFFF;
478                 }
479                 number++;
480         }
481         end = client->csqcnumedicts;
482         for (;number < end;number++)
483         {
484                 if (client->csqcentityscope[number])
485                 {
486                         client->csqcentityscope[number] = 1;
487                         client->csqcentitysendflags[number] = 0xFFFFFF;
488                 }
489         }
490
491         /*
492         // mark all scope entities as remove
493         for (number = 1;number < client->csqcnumedicts;number++)
494                 if (client->csqcentityscope[number])
495                         client->csqcentityscope[number] = 1;
496         // keep visible entities
497         for (i = 0, n = states;i < numstates;i++, n++)
498         {
499                 number = n->number;
500                 ed = prog->edicts + number;
501                 val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.SendEntity);
502                 if (val->function)
503                         client->csqcentityscope[number] = 2;
504         }
505         */
506
507         // now try to emit the entity updates
508         // (FIXME: prioritize by distance?)
509         end = client->csqcnumedicts;
510         for (number = 1;number < end;number++)
511         {
512                 if (!client->csqcentityscope[number])
513                         continue;
514                 sendflags = client->csqcentitysendflags[number];
515                 if (!sendflags)
516                         continue;
517                 if(db->num >= NUM_CSQCENTITIES_PER_FRAME)
518                         break;
519                 ed = prog->edicts + number;
520                 // entity scope is either update (2) or remove (1)
521                 if (client->csqcentityscope[number] == 1)
522                 {
523                         // write a remove message
524                         // first write the message identifier if needed
525                         if(!sectionstarted)
526                         {
527                                 sectionstarted = 1;
528                                 MSG_WriteByte(msg, svc_csqcentities);
529                         }
530                         // write the remove message
531                         {
532                                 ENTITYSIZEPROFILING_START(msg, number);
533                                 MSG_WriteShort(msg, (unsigned short)number | 0x8000);
534                                 client->csqcentityscope[number] = 0;
535                                 client->csqcentitysendflags[number] = 0xFFFFFF; // resend completely if it becomes active again
536                                 db->entno[db->num] = number;
537                                 db->sendflags[db->num] = -1;
538                                 db->num += 1;
539                                 client->csqcentityglobalhistory[number] = 1;
540                                 ENTITYSIZEPROFILING_END(msg, number);
541                         }
542                         if (msg->cursize + 17 >= maxsize)
543                                 break;
544                 }
545                 else
546                 {
547                         // write an update
548                         // save the cursize value in case we overflow and have to rollback
549                         int oldcursize = msg->cursize;
550                         client->csqcentityscope[number] = 1;
551                         val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.SendEntity);
552                         if (val->function)
553                         {
554                                 if(!sectionstarted)
555                                         MSG_WriteByte(msg, svc_csqcentities);
556                                 {
557                                         ENTITYSIZEPROFILING_START(msg, number);
558                                         MSG_WriteShort(msg, number);
559                                         msg->allowoverflow = true;
560                                         PRVM_G_INT(OFS_PARM0) = sv.writeentitiestoclient_cliententitynumber;
561                                         PRVM_G_FLOAT(OFS_PARM1) = sendflags;
562                                         prog->globals.server->self = number;
563                                         PRVM_ExecuteProgram(val->function, "Null SendEntity\n");
564                                         msg->allowoverflow = false;
565                                         if(PRVM_G_FLOAT(OFS_RETURN) && msg->cursize + 2 <= maxsize)
566                                         {
567                                                 // an update has been successfully written
568                                                 client->csqcentitysendflags[number] = 0;
569                                                 db->entno[db->num] = number;
570                                                 db->sendflags[db->num] = sendflags;
571                                                 db->num += 1;
572                                                 client->csqcentityglobalhistory[number] = 1;
573                                                 // and take note that we have begun the svc_csqcentities
574                                                 // section of the packet
575                                                 sectionstarted = 1;
576                                                 ENTITYSIZEPROFILING_END(msg, number);
577                                                 if (msg->cursize + 17 >= maxsize)
578                                                         break;
579                                                 continue;
580                                         }
581                                 }
582                         }
583                         // self.SendEntity returned false (or does not exist) or the
584                         // update was too big for this packet - rollback the buffer to its
585                         // state before the writes occurred, we'll try again next frame
586                         msg->cursize = oldcursize;
587                         msg->overflowed = false;
588                 }
589         }
590         if (sectionstarted)
591         {
592                 // write index 0 to end the update (0 is never used by real entities)
593                 MSG_WriteShort(msg, 0);
594         }
595
596         if(db->num == 0)
597                 // if no single ent got added, remove the frame from the DB again, to allow
598                 // for a larger history
599                 EntityFrameCSQC_DeallocFrame(client, framenum);
600 }
601
602 void Protocol_UpdateClientStats(const int *stats)
603 {
604         int i;
605         // update the stats array and set deltabits for any changed stats
606         for (i = 0;i < MAX_CL_STATS;i++)
607         {
608                 if (host_client->stats[i] != stats[i])
609                 {
610                         host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
611                         host_client->stats[i] = stats[i];
612                 }
613         }
614 }
615
616 // only a few stats are within the 32 stat limit of Quake, and most of them
617 // are sent every frame in svc_clientdata messages, so we only send the
618 // remaining ones here
619 static const int sendquakestats[] =
620 {
621 // quake did not send these secrets/monsters stats in this way, but doing so
622 // allows a mod to increase STAT_TOTALMONSTERS during the game, and ensures
623 // that STAT_SECRETS and STAT_MONSTERS are always correct (even if a client
624 // didn't receive an svc_foundsecret or svc_killedmonster), which may be most
625 // valuable if randomly seeking around in a demo
626 STAT_TOTALSECRETS, // never changes during game
627 STAT_TOTALMONSTERS, // changes in some mods
628 STAT_SECRETS, // this makes svc_foundsecret unnecessary
629 STAT_MONSTERS, // this makes svc_killedmonster unnecessary
630 STAT_VIEWHEIGHT, // sent just for FTEQW clients
631 STAT_VIEWZOOM, // this rarely changes
632 -1,
633 };
634
635 void Protocol_WriteStatsReliable(void)
636 {
637         int i, j;
638         if (!host_client->netconnection)
639                 return;
640         // detect changes in stats and write reliable messages
641         // this only deals with 32 stats because the older protocols which use
642         // this function can only cope with 32 stats,
643         // they also do not support svc_updatestatubyte which was introduced in
644         // DP6 protocol (except for QW)
645         for (j = 0;sendquakestats[j] >= 0;j++)
646         {
647                 i = sendquakestats[j];
648                 // check if this bit is set
649                 if (host_client->statsdeltabits[i >> 3] & (1 << (i & 7)))
650                 {
651                         host_client->statsdeltabits[i >> 3] -= (1 << (i & 7));
652                         // send the stat as a byte if possible
653                         if (sv.protocol == PROTOCOL_QUAKEWORLD)
654                         {
655                                 if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
656                                 {
657                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestat);
658                                         MSG_WriteByte(&host_client->netconnection->message, i);
659                                         MSG_WriteByte(&host_client->netconnection->message, host_client->stats[i]);
660                                 }
661                                 else
662                                 {
663                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestatlong);
664                                         MSG_WriteByte(&host_client->netconnection->message, i);
665                                         MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
666                                 }
667                         }
668                         else
669                         {
670                                 // this could make use of svc_updatestatubyte in DP6 and later
671                                 // protocols but those protocols do not use this function
672                                 MSG_WriteByte(&host_client->netconnection->message, svc_updatestat);
673                                 MSG_WriteByte(&host_client->netconnection->message, i);
674                                 MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
675                         }
676                 }
677         }
678 }
679
680
681 void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int maxsize, int numstates, const entity_state_t *states)
682 {
683         const entity_state_t *s;
684         entity_state_t baseline;
685         int i, bits;
686         sizebuf_t buf;
687         unsigned char data[128];
688         prvm_eval_t *val;
689
690         // prepare the buffer
691         memset(&buf, 0, sizeof(buf));
692         buf.data = data;
693         buf.maxsize = sizeof(data);
694
695         for (i = 0, s = states;i < numstates;i++, s++)
696         {
697                 ENTITYSIZEPROFILING_START(msg, s->number);
698                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
699                 if(val && val->function)
700                         continue;
701
702                 // prepare the buffer
703                 SZ_Clear(&buf);
704
705 // send an update
706                 bits = 0;
707                 if (s->number >= 256)
708                         bits |= U_LONGENTITY;
709                 if (s->flags & RENDER_STEP)
710                         bits |= U_STEP;
711                 if (s->flags & RENDER_VIEWMODEL)
712                         bits |= U_VIEWMODEL;
713                 if (s->flags & RENDER_GLOWTRAIL)
714                         bits |= U_GLOWTRAIL;
715                 if (s->flags & RENDER_EXTERIORMODEL)
716                         bits |= U_EXTERIORMODEL;
717
718                 // LordHavoc: old stuff, but rewritten to have more exact tolerances
719                 baseline = prog->edicts[s->number].priv.server->baseline;
720                 if (baseline.origin[0] != s->origin[0])
721                         bits |= U_ORIGIN1;
722                 if (baseline.origin[1] != s->origin[1])
723                         bits |= U_ORIGIN2;
724                 if (baseline.origin[2] != s->origin[2])
725                         bits |= U_ORIGIN3;
726                 if (baseline.angles[0] != s->angles[0])
727                         bits |= U_ANGLE1;
728                 if (baseline.angles[1] != s->angles[1])
729                         bits |= U_ANGLE2;
730                 if (baseline.angles[2] != s->angles[2])
731                         bits |= U_ANGLE3;
732                 if (baseline.colormap != s->colormap)
733                         bits |= U_COLORMAP;
734                 if (baseline.skin != s->skin)
735                         bits |= U_SKIN;
736                 if (baseline.frame != s->frame)
737                 {
738                         bits |= U_FRAME;
739                         if (s->frame & 0xFF00)
740                                 bits |= U_FRAME2;
741                 }
742                 if (baseline.effects != s->effects)
743                 {
744                         bits |= U_EFFECTS;
745                         if (s->effects & 0xFF00)
746                                 bits |= U_EFFECTS2;
747                 }
748                 if (baseline.modelindex != s->modelindex)
749                 {
750                         bits |= U_MODEL;
751                         if ((s->modelindex & 0xFF00) && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3)
752                                 bits |= U_MODEL2;
753                 }
754                 if (baseline.alpha != s->alpha)
755                         bits |= U_ALPHA;
756                 if (baseline.scale != s->scale)
757                         bits |= U_SCALE;
758                 if (baseline.glowsize != s->glowsize)
759                         bits |= U_GLOWSIZE;
760                 if (baseline.glowcolor != s->glowcolor)
761                         bits |= U_GLOWCOLOR;
762                 if (!VectorCompare(baseline.colormod, s->colormod))
763                         bits |= U_COLORMOD;
764
765                 // if extensions are disabled, clear the relevant update flags
766                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
767                         bits &= 0x7FFF;
768                 if (sv.protocol == PROTOCOL_NEHAHRAMOVIE)
769                         if (s->alpha != 255 || s->effects & EF_FULLBRIGHT)
770                                 bits |= U_EXTEND1;
771
772                 // write the message
773                 if (bits >= 16777216)
774                         bits |= U_EXTEND2;
775                 if (bits >= 65536)
776                         bits |= U_EXTEND1;
777                 if (bits >= 256)
778                         bits |= U_MOREBITS;
779                 bits |= U_SIGNAL;
780
781                 MSG_WriteByte (&buf, bits);
782                 if (bits & U_MOREBITS)          MSG_WriteByte(&buf, bits>>8);
783                 if (sv.protocol != PROTOCOL_NEHAHRAMOVIE)
784                 {
785                         if (bits & U_EXTEND1)   MSG_WriteByte(&buf, bits>>16);
786                         if (bits & U_EXTEND2)   MSG_WriteByte(&buf, bits>>24);
787                 }
788                 if (bits & U_LONGENTITY)        MSG_WriteShort(&buf, s->number);
789                 else                                            MSG_WriteByte(&buf, s->number);
790
791                 if (bits & U_MODEL)
792                 {
793                         if (sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3)
794                                 MSG_WriteShort(&buf, s->modelindex);
795                         else
796                                 MSG_WriteByte(&buf, s->modelindex);
797                 }
798                 if (bits & U_FRAME)                     MSG_WriteByte(&buf, s->frame);
799                 if (bits & U_COLORMAP)          MSG_WriteByte(&buf, s->colormap);
800                 if (bits & U_SKIN)                      MSG_WriteByte(&buf, s->skin);
801                 if (bits & U_EFFECTS)           MSG_WriteByte(&buf, s->effects);
802                 if (bits & U_ORIGIN1)           MSG_WriteCoord(&buf, s->origin[0], sv.protocol);
803                 if (bits & U_ANGLE1)            MSG_WriteAngle(&buf, s->angles[0], sv.protocol);
804                 if (bits & U_ORIGIN2)           MSG_WriteCoord(&buf, s->origin[1], sv.protocol);
805                 if (bits & U_ANGLE2)            MSG_WriteAngle(&buf, s->angles[1], sv.protocol);
806                 if (bits & U_ORIGIN3)           MSG_WriteCoord(&buf, s->origin[2], sv.protocol);
807                 if (bits & U_ANGLE3)            MSG_WriteAngle(&buf, s->angles[2], sv.protocol);
808                 if (bits & U_ALPHA)                     MSG_WriteByte(&buf, s->alpha);
809                 if (bits & U_SCALE)                     MSG_WriteByte(&buf, s->scale);
810                 if (bits & U_EFFECTS2)          MSG_WriteByte(&buf, s->effects >> 8);
811                 if (bits & U_GLOWSIZE)          MSG_WriteByte(&buf, s->glowsize);
812                 if (bits & U_GLOWCOLOR)         MSG_WriteByte(&buf, s->glowcolor);
813                 if (bits & U_COLORMOD)          {int c = ((int)bound(0, s->colormod[0] * (7.0f / 32.0f), 7) << 5) | ((int)bound(0, s->colormod[1] * (7.0f / 32.0f), 7) << 2) | ((int)bound(0, s->colormod[2] * (3.0f / 32.0f), 3) << 0);MSG_WriteByte(&buf, c);}
814                 if (bits & U_FRAME2)            MSG_WriteByte(&buf, s->frame >> 8);
815                 if (bits & U_MODEL2)            MSG_WriteByte(&buf, s->modelindex >> 8);
816
817                 // the nasty protocol
818                 if ((bits & U_EXTEND1) && sv.protocol == PROTOCOL_NEHAHRAMOVIE)
819                 {
820                         if (s->effects & EF_FULLBRIGHT)
821                         {
822                                 MSG_WriteFloat(&buf, 2); // QSG protocol version
823                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
824                                 MSG_WriteFloat(&buf, 1); // fullbright
825                         }
826                         else
827                         {
828                                 MSG_WriteFloat(&buf, 1); // QSG protocol version
829                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
830                         }
831                 }
832
833                 // if the commit is full, we're done this frame
834                 if (msg->cursize + buf.cursize > maxsize)
835                 {
836                         // next frame we will continue where we left off
837                         break;
838                 }
839                 // write the message to the packet
840                 SZ_Write(msg, buf.data, buf.cursize);
841                 ENTITYSIZEPROFILING_END(msg, s->number);
842         }
843 }
844
845 int EntityState_DeltaBits(const entity_state_t *o, const entity_state_t *n)
846 {
847         unsigned int bits;
848         // if o is not active, delta from default
849         if (!o->active)
850                 o = &defaultstate;
851         bits = 0;
852         if (fabs(n->origin[0] - o->origin[0]) > (1.0f / 256.0f))
853                 bits |= E_ORIGIN1;
854         if (fabs(n->origin[1] - o->origin[1]) > (1.0f / 256.0f))
855                 bits |= E_ORIGIN2;
856         if (fabs(n->origin[2] - o->origin[2]) > (1.0f / 256.0f))
857                 bits |= E_ORIGIN3;
858         if ((unsigned char) (n->angles[0] * (256.0f / 360.0f)) != (unsigned char) (o->angles[0] * (256.0f / 360.0f)))
859                 bits |= E_ANGLE1;
860         if ((unsigned char) (n->angles[1] * (256.0f / 360.0f)) != (unsigned char) (o->angles[1] * (256.0f / 360.0f)))
861                 bits |= E_ANGLE2;
862         if ((unsigned char) (n->angles[2] * (256.0f / 360.0f)) != (unsigned char) (o->angles[2] * (256.0f / 360.0f)))
863                 bits |= E_ANGLE3;
864         if ((n->modelindex ^ o->modelindex) & 0x00FF)
865                 bits |= E_MODEL1;
866         if ((n->modelindex ^ o->modelindex) & 0xFF00)
867                 bits |= E_MODEL2;
868         if ((n->frame ^ o->frame) & 0x00FF)
869                 bits |= E_FRAME1;
870         if ((n->frame ^ o->frame) & 0xFF00)
871                 bits |= E_FRAME2;
872         if ((n->effects ^ o->effects) & 0x00FF)
873                 bits |= E_EFFECTS1;
874         if ((n->effects ^ o->effects) & 0xFF00)
875                 bits |= E_EFFECTS2;
876         if (n->colormap != o->colormap)
877                 bits |= E_COLORMAP;
878         if (n->skin != o->skin)
879                 bits |= E_SKIN;
880         if (n->alpha != o->alpha)
881                 bits |= E_ALPHA;
882         if (n->scale != o->scale)
883                 bits |= E_SCALE;
884         if (n->glowsize != o->glowsize)
885                 bits |= E_GLOWSIZE;
886         if (n->glowcolor != o->glowcolor)
887                 bits |= E_GLOWCOLOR;
888         if (n->flags != o->flags)
889                 bits |= E_FLAGS;
890         if (n->tagindex != o->tagindex || n->tagentity != o->tagentity)
891                 bits |= E_TAGATTACHMENT;
892         if (n->light[0] != o->light[0] || n->light[1] != o->light[1] || n->light[2] != o->light[2] || n->light[3] != o->light[3])
893                 bits |= E_LIGHT;
894         if (n->lightstyle != o->lightstyle)
895                 bits |= E_LIGHTSTYLE;
896         if (n->lightpflags != o->lightpflags)
897                 bits |= E_LIGHTPFLAGS;
898
899         if (bits)
900         {
901                 if (bits &  0xFF000000)
902                         bits |= 0x00800000;
903                 if (bits &  0x00FF0000)
904                         bits |= 0x00008000;
905                 if (bits &  0x0000FF00)
906                         bits |= 0x00000080;
907         }
908         return bits;
909 }
910
911 void EntityState_WriteExtendBits(sizebuf_t *msg, unsigned int bits)
912 {
913         MSG_WriteByte(msg, bits & 0xFF);
914         if (bits & 0x00000080)
915         {
916                 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
917                 if (bits & 0x00008000)
918                 {
919                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
920                         if (bits & 0x00800000)
921                                 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
922                 }
923         }
924 }
925
926 void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned int bits)
927 {
928         if (sv.protocol == PROTOCOL_DARKPLACES2)
929         {
930                 if (bits & E_ORIGIN1)
931                         MSG_WriteCoord16i(msg, ent->origin[0]);
932                 if (bits & E_ORIGIN2)
933                         MSG_WriteCoord16i(msg, ent->origin[1]);
934                 if (bits & E_ORIGIN3)
935                         MSG_WriteCoord16i(msg, ent->origin[2]);
936         }
937         else
938         {
939                 // LordHavoc: have to write flags first, as they can modify protocol
940                 if (bits & E_FLAGS)
941                         MSG_WriteByte(msg, ent->flags);
942                 if (ent->flags & RENDER_LOWPRECISION)
943                 {
944                         if (bits & E_ORIGIN1)
945                                 MSG_WriteCoord16i(msg, ent->origin[0]);
946                         if (bits & E_ORIGIN2)
947                                 MSG_WriteCoord16i(msg, ent->origin[1]);
948                         if (bits & E_ORIGIN3)
949                                 MSG_WriteCoord16i(msg, ent->origin[2]);
950                 }
951                 else
952                 {
953                         if (bits & E_ORIGIN1)
954                                 MSG_WriteCoord32f(msg, ent->origin[0]);
955                         if (bits & E_ORIGIN2)
956                                 MSG_WriteCoord32f(msg, ent->origin[1]);
957                         if (bits & E_ORIGIN3)
958                                 MSG_WriteCoord32f(msg, ent->origin[2]);
959                 }
960         }
961         if ((sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4) && (ent->flags & RENDER_LOWPRECISION))
962         {
963                 if (bits & E_ANGLE1)
964                         MSG_WriteAngle8i(msg, ent->angles[0]);
965                 if (bits & E_ANGLE2)
966                         MSG_WriteAngle8i(msg, ent->angles[1]);
967                 if (bits & E_ANGLE3)
968                         MSG_WriteAngle8i(msg, ent->angles[2]);
969         }
970         else
971         {
972                 if (bits & E_ANGLE1)
973                         MSG_WriteAngle16i(msg, ent->angles[0]);
974                 if (bits & E_ANGLE2)
975                         MSG_WriteAngle16i(msg, ent->angles[1]);
976                 if (bits & E_ANGLE3)
977                         MSG_WriteAngle16i(msg, ent->angles[2]);
978         }
979         if (bits & E_MODEL1)
980                 MSG_WriteByte(msg, ent->modelindex & 0xFF);
981         if (bits & E_MODEL2)
982                 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
983         if (bits & E_FRAME1)
984                 MSG_WriteByte(msg, ent->frame & 0xFF);
985         if (bits & E_FRAME2)
986                 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
987         if (bits & E_EFFECTS1)
988                 MSG_WriteByte(msg, ent->effects & 0xFF);
989         if (bits & E_EFFECTS2)
990                 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
991         if (bits & E_COLORMAP)
992                 MSG_WriteByte(msg, ent->colormap);
993         if (bits & E_SKIN)
994                 MSG_WriteByte(msg, ent->skin);
995         if (bits & E_ALPHA)
996                 MSG_WriteByte(msg, ent->alpha);
997         if (bits & E_SCALE)
998                 MSG_WriteByte(msg, ent->scale);
999         if (bits & E_GLOWSIZE)
1000                 MSG_WriteByte(msg, ent->glowsize);
1001         if (bits & E_GLOWCOLOR)
1002                 MSG_WriteByte(msg, ent->glowcolor);
1003         if (sv.protocol == PROTOCOL_DARKPLACES2)
1004                 if (bits & E_FLAGS)
1005                         MSG_WriteByte(msg, ent->flags);
1006         if (bits & E_TAGATTACHMENT)
1007         {
1008                 MSG_WriteShort(msg, ent->tagentity);
1009                 MSG_WriteByte(msg, ent->tagindex);
1010         }
1011         if (bits & E_LIGHT)
1012         {
1013                 MSG_WriteShort(msg, ent->light[0]);
1014                 MSG_WriteShort(msg, ent->light[1]);
1015                 MSG_WriteShort(msg, ent->light[2]);
1016                 MSG_WriteShort(msg, ent->light[3]);
1017         }
1018         if (bits & E_LIGHTSTYLE)
1019                 MSG_WriteByte(msg, ent->lightstyle);
1020         if (bits & E_LIGHTPFLAGS)
1021                 MSG_WriteByte(msg, ent->lightpflags);
1022 }
1023
1024 void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
1025 {
1026         unsigned int bits;
1027         ENTITYSIZEPROFILING_START(msg, ent->number);
1028         if (ent->active)
1029         {
1030                 // entity is active, check for changes from the delta
1031                 if ((bits = EntityState_DeltaBits(delta, ent)))
1032                 {
1033                         // write the update number, bits, and fields
1034                         MSG_WriteShort(msg, ent->number);
1035                         EntityState_WriteExtendBits(msg, bits);
1036                         EntityState_WriteFields(ent, msg, bits);
1037                 }
1038         }
1039         else
1040         {
1041                 // entity is inactive, check if the delta was active
1042                 if (delta->active)
1043                 {
1044                         // write the remove number
1045                         MSG_WriteShort(msg, ent->number | 0x8000);
1046                 }
1047         }
1048         ENTITYSIZEPROFILING_END(msg, ent->number);
1049 }
1050
1051 int EntityState_ReadExtendBits(void)
1052 {
1053         unsigned int bits;
1054         bits = MSG_ReadByte();
1055         if (bits & 0x00000080)
1056         {
1057                 bits |= MSG_ReadByte() << 8;
1058                 if (bits & 0x00008000)
1059                 {
1060                         bits |= MSG_ReadByte() << 16;
1061                         if (bits & 0x00800000)
1062                                 bits |= MSG_ReadByte() << 24;
1063                 }
1064         }
1065         return bits;
1066 }
1067
1068 void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
1069 {
1070         if (cls.protocol == PROTOCOL_DARKPLACES2)
1071         {
1072                 if (bits & E_ORIGIN1)
1073                         e->origin[0] = MSG_ReadCoord16i();
1074                 if (bits & E_ORIGIN2)
1075                         e->origin[1] = MSG_ReadCoord16i();
1076                 if (bits & E_ORIGIN3)
1077                         e->origin[2] = MSG_ReadCoord16i();
1078         }
1079         else
1080         {
1081                 if (bits & E_FLAGS)
1082                         e->flags = MSG_ReadByte();
1083                 if (e->flags & RENDER_LOWPRECISION)
1084                 {
1085                         if (bits & E_ORIGIN1)
1086                                 e->origin[0] = MSG_ReadCoord16i();
1087                         if (bits & E_ORIGIN2)
1088                                 e->origin[1] = MSG_ReadCoord16i();
1089                         if (bits & E_ORIGIN3)
1090                                 e->origin[2] = MSG_ReadCoord16i();
1091                 }
1092                 else
1093                 {
1094                         if (bits & E_ORIGIN1)
1095                                 e->origin[0] = MSG_ReadCoord32f();
1096                         if (bits & E_ORIGIN2)
1097                                 e->origin[1] = MSG_ReadCoord32f();
1098                         if (bits & E_ORIGIN3)
1099                                 e->origin[2] = MSG_ReadCoord32f();
1100                 }
1101         }
1102         if ((cls.protocol == PROTOCOL_DARKPLACES5 || cls.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
1103         {
1104                 if (bits & E_ANGLE1)
1105                         e->angles[0] = MSG_ReadAngle16i();
1106                 if (bits & E_ANGLE2)
1107                         e->angles[1] = MSG_ReadAngle16i();
1108                 if (bits & E_ANGLE3)
1109                         e->angles[2] = MSG_ReadAngle16i();
1110         }
1111         else
1112         {
1113                 if (bits & E_ANGLE1)
1114                         e->angles[0] = MSG_ReadAngle8i();
1115                 if (bits & E_ANGLE2)
1116                         e->angles[1] = MSG_ReadAngle8i();
1117                 if (bits & E_ANGLE3)
1118                         e->angles[2] = MSG_ReadAngle8i();
1119         }
1120         if (bits & E_MODEL1)
1121                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
1122         if (bits & E_MODEL2)
1123                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
1124         if (bits & E_FRAME1)
1125                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
1126         if (bits & E_FRAME2)
1127                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
1128         if (bits & E_EFFECTS1)
1129                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
1130         if (bits & E_EFFECTS2)
1131                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
1132         if (bits & E_COLORMAP)
1133                 e->colormap = MSG_ReadByte();
1134         if (bits & E_SKIN)
1135                 e->skin = MSG_ReadByte();
1136         if (bits & E_ALPHA)
1137                 e->alpha = MSG_ReadByte();
1138         if (bits & E_SCALE)
1139                 e->scale = MSG_ReadByte();
1140         if (bits & E_GLOWSIZE)
1141                 e->glowsize = MSG_ReadByte();
1142         if (bits & E_GLOWCOLOR)
1143                 e->glowcolor = MSG_ReadByte();
1144         if (cls.protocol == PROTOCOL_DARKPLACES2)
1145                 if (bits & E_FLAGS)
1146                         e->flags = MSG_ReadByte();
1147         if (bits & E_TAGATTACHMENT)
1148         {
1149                 e->tagentity = (unsigned short) MSG_ReadShort();
1150                 e->tagindex = MSG_ReadByte();
1151         }
1152         if (bits & E_LIGHT)
1153         {
1154                 e->light[0] = (unsigned short) MSG_ReadShort();
1155                 e->light[1] = (unsigned short) MSG_ReadShort();
1156                 e->light[2] = (unsigned short) MSG_ReadShort();
1157                 e->light[3] = (unsigned short) MSG_ReadShort();
1158         }
1159         if (bits & E_LIGHTSTYLE)
1160                 e->lightstyle = MSG_ReadByte();
1161         if (bits & E_LIGHTPFLAGS)
1162                 e->lightpflags = MSG_ReadByte();
1163
1164         if (developer_networkentities.integer >= 2)
1165         {
1166                 Con_Printf("ReadFields e%i", e->number);
1167
1168                 if (bits & E_ORIGIN1)
1169                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
1170                 if (bits & E_ORIGIN2)
1171                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
1172                 if (bits & E_ORIGIN3)
1173                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
1174                 if (bits & E_ANGLE1)
1175                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
1176                 if (bits & E_ANGLE2)
1177                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
1178                 if (bits & E_ANGLE3)
1179                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
1180                 if (bits & (E_MODEL1 | E_MODEL2))
1181                         Con_Printf(" E_MODEL %i", e->modelindex);
1182
1183                 if (bits & (E_FRAME1 | E_FRAME2))
1184                         Con_Printf(" E_FRAME %i", e->frame);
1185                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
1186                         Con_Printf(" E_EFFECTS %i", e->effects);
1187                 if (bits & E_ALPHA)
1188                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
1189                 if (bits & E_SCALE)
1190                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
1191                 if (bits & E_COLORMAP)
1192                         Con_Printf(" E_COLORMAP %i", e->colormap);
1193                 if (bits & E_SKIN)
1194                         Con_Printf(" E_SKIN %i", e->skin);
1195
1196                 if (bits & E_GLOWSIZE)
1197                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
1198                 if (bits & E_GLOWCOLOR)
1199                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
1200
1201                 if (bits & E_LIGHT)
1202                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
1203                 if (bits & E_LIGHTPFLAGS)
1204                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
1205
1206                 if (bits & E_TAGATTACHMENT)
1207                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
1208                 if (bits & E_LIGHTSTYLE)
1209                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
1210                 Con_Print("\n");
1211         }
1212 }
1213
1214 // (client and server) allocates a new empty database
1215 entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
1216 {
1217         return (entityframe_database_t *)Mem_Alloc(mempool, sizeof(entityframe_database_t));
1218 }
1219
1220 // (client and server) frees the database
1221 void EntityFrame_FreeDatabase(entityframe_database_t *d)
1222 {
1223         Mem_Free(d);
1224 }
1225
1226 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
1227 void EntityFrame_ClearDatabase(entityframe_database_t *d)
1228 {
1229         memset(d, 0, sizeof(*d));
1230 }
1231
1232 // (server and client) removes frames older than 'frame' from database
1233 void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
1234 {
1235         int i;
1236         d->ackframenum = frame;
1237         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
1238         // ignore outdated frame acks (out of order packets)
1239         if (i == 0)
1240                 return;
1241         d->numframes -= i;
1242         // if some queue is left, slide it down to beginning of array
1243         if (d->numframes)
1244                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
1245 }
1246
1247 // (server) clears frame, to prepare for adding entities
1248 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
1249 {
1250         f->time = 0;
1251         f->framenum = framenum;
1252         f->numentities = 0;
1253         if (eye == NULL)
1254                 VectorClear(f->eye);
1255         else
1256                 VectorCopy(eye, f->eye);
1257 }
1258
1259 // (server and client) reads a frame from the database
1260 void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
1261 {
1262         int i, n;
1263         EntityFrame_Clear(f, NULL, -1);
1264         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
1265         if (i < d->numframes && framenum == d->frames[i].framenum)
1266         {
1267                 f->framenum = framenum;
1268                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
1269                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
1270                 if (n > f->numentities)
1271                         n = f->numentities;
1272                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
1273                 if (f->numentities > n)
1274                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
1275                 VectorCopy(d->eye, f->eye);
1276         }
1277 }
1278
1279 // (server and client) adds a entity_frame to the database, for future reference
1280 void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
1281 {
1282         int n, e;
1283         entity_frameinfo_t *info;
1284
1285         VectorCopy(eye, d->eye);
1286
1287         // figure out how many entity slots are used already
1288         if (d->numframes)
1289         {
1290                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
1291                 if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
1292                 {
1293                         // ran out of room, dump database
1294                         EntityFrame_ClearDatabase(d);
1295                 }
1296         }
1297
1298         info = &d->frames[d->numframes];
1299         info->framenum = framenum;
1300         e = -1000;
1301         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
1302         for (n = 0;n <= d->numframes;n++)
1303         {
1304                 if (e >= d->frames[n].framenum)
1305                 {
1306                         if (e == framenum)
1307                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
1308                         else
1309                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
1310                         return;
1311                 }
1312                 e = d->frames[n].framenum;
1313         }
1314         // if database still has frames after that...
1315         if (d->numframes)
1316                 info->firstentity = d->frames[d->numframes - 1].endentity;
1317         else
1318                 info->firstentity = 0;
1319         info->endentity = info->firstentity + numentities;
1320         d->numframes++;
1321
1322         n = info->firstentity % MAX_ENTITY_DATABASE;
1323         e = MAX_ENTITY_DATABASE - n;
1324         if (e > numentities)
1325                 e = numentities;
1326         memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
1327         if (numentities > e)
1328                 memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
1329 }
1330
1331 // (server) writes a frame to network stream
1332 void EntityFrame_WriteFrame(sizebuf_t *msg, int maxsize, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
1333 {
1334         int i, onum, number;
1335         entity_frame_t *o = &d->deltaframe;
1336         const entity_state_t *ent, *delta;
1337         vec3_t eye;
1338         prvm_eval_t *val;
1339
1340         d->latestframenum++;
1341
1342         VectorClear(eye);
1343         for (i = 0;i < numstates;i++)
1344         {
1345                 if (states[i].number == viewentnum)
1346                 {
1347                         VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
1348                         break;
1349                 }
1350         }
1351
1352         EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
1353
1354         EntityFrame_FetchFrame(d, d->ackframenum, o);
1355
1356         MSG_WriteByte (msg, svc_entities);
1357         MSG_WriteLong (msg, o->framenum);
1358         MSG_WriteLong (msg, d->latestframenum);
1359         MSG_WriteFloat (msg, eye[0]);
1360         MSG_WriteFloat (msg, eye[1]);
1361         MSG_WriteFloat (msg, eye[2]);
1362
1363         onum = 0;
1364         for (i = 0;i < numstates;i++)
1365         {
1366                 ent = states + i;
1367                 number = ent->number;
1368
1369                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[number]), prog->fieldoffsets.SendEntity);
1370                 if(val && val->function)
1371                                 continue;
1372                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
1373                 {
1374                         // write remove message
1375                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1376                 }
1377                 if (onum < o->numentities && (o->entitydata[onum].number == number))
1378                 {
1379                         // delta from previous frame
1380                         delta = o->entitydata + onum;
1381                         // advance to next entity in delta frame
1382                         onum++;
1383                 }
1384                 else
1385                 {
1386                         // delta from defaults
1387                         delta = &defaultstate;
1388                 }
1389                 EntityState_WriteUpdate(ent, msg, delta);
1390         }
1391         for (;onum < o->numentities;onum++)
1392         {
1393                 // write remove message
1394                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1395         }
1396         MSG_WriteShort(msg, 0xFFFF);
1397 }
1398
1399 // (client) reads a frame from network stream
1400 void EntityFrame_CL_ReadFrame(void)
1401 {
1402         int i, number, removed;
1403         entity_frame_t *f, *delta;
1404         entity_state_t *e, *old, *oldend;
1405         entity_t *ent;
1406         entityframe_database_t *d;
1407         if (!cl.entitydatabase)
1408                 cl.entitydatabase = EntityFrame_AllocDatabase(cls.levelmempool);
1409         d = cl.entitydatabase;
1410         f = &d->framedata;
1411         delta = &d->deltaframe;
1412
1413         EntityFrame_Clear(f, NULL, -1);
1414
1415         // read the frame header info
1416         f->time = cl.mtime[0];
1417         number = MSG_ReadLong();
1418         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1419                 cl.latestframenums[i] = cl.latestframenums[i+1];
1420         cl.latestframenums[LATESTFRAMENUMS-1] = f->framenum = MSG_ReadLong();
1421         f->eye[0] = MSG_ReadFloat();
1422         f->eye[1] = MSG_ReadFloat();
1423         f->eye[2] = MSG_ReadFloat();
1424         EntityFrame_AckFrame(d, number);
1425         EntityFrame_FetchFrame(d, number, delta);
1426         old = delta->entitydata;
1427         oldend = old + delta->numentities;
1428         // read entities until we hit the magic 0xFFFF end tag
1429         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
1430         {
1431                 if (msg_badread)
1432                         Host_Error("EntityFrame_Read: read error");
1433                 removed = number & 0x8000;
1434                 number &= 0x7FFF;
1435                 if (number >= MAX_EDICTS)
1436                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)", number, MAX_EDICTS);
1437
1438                 // seek to entity, while copying any skipped entities (assume unchanged)
1439                 while (old < oldend && old->number < number)
1440                 {
1441                         if (f->numentities >= MAX_ENTITY_DATABASE)
1442                                 Host_Error("EntityFrame_Read: entity list too big");
1443                         f->entitydata[f->numentities] = *old++;
1444                         f->entitydata[f->numentities++].time = cl.mtime[0];
1445                 }
1446                 if (removed)
1447                 {
1448                         if (old < oldend && old->number == number)
1449                                 old++;
1450                         else
1451                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
1452                 }
1453                 else
1454                 {
1455                         if (f->numentities >= MAX_ENTITY_DATABASE)
1456                                 Host_Error("EntityFrame_Read: entity list too big");
1457
1458                         // reserve this slot
1459                         e = f->entitydata + f->numentities++;
1460
1461                         if (old < oldend && old->number == number)
1462                         {
1463                                 // delta from old entity
1464                                 *e = *old++;
1465                         }
1466                         else
1467                         {
1468                                 // delta from defaults
1469                                 *e = defaultstate;
1470                         }
1471
1472                         if (cl.num_entities <= number)
1473                         {
1474                                 cl.num_entities = number + 1;
1475                                 if (number >= cl.max_entities)
1476                                         CL_ExpandEntities(number);
1477                         }
1478                         cl.entities_active[number] = true;
1479                         e->active = true;
1480                         e->time = cl.mtime[0];
1481                         e->number = number;
1482                         EntityState_ReadFields(e, EntityState_ReadExtendBits());
1483                 }
1484         }
1485         while (old < oldend)
1486         {
1487                 if (f->numentities >= MAX_ENTITY_DATABASE)
1488                         Host_Error("EntityFrame_Read: entity list too big");
1489                 f->entitydata[f->numentities] = *old++;
1490                 f->entitydata[f->numentities++].time = cl.mtime[0];
1491         }
1492         EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
1493
1494         memset(cl.entities_active, 0, cl.num_entities * sizeof(unsigned char));
1495         number = 1;
1496         for (i = 0;i < f->numentities;i++)
1497         {
1498                 for (;number < f->entitydata[i].number && number < cl.num_entities;number++)
1499                 {
1500                         if (cl.entities_active[number])
1501                         {
1502                                 cl.entities_active[number] = false;
1503                                 cl.entities[number].state_current.active = false;
1504                         }
1505                 }
1506                 if (number >= cl.num_entities)
1507                         break;
1508                 // update the entity
1509                 ent = &cl.entities[number];
1510                 ent->state_previous = ent->state_current;
1511                 ent->state_current = f->entitydata[i];
1512                 CL_MoveLerpEntityStates(ent);
1513                 // the entity lives again...
1514                 cl.entities_active[number] = true;
1515                 number++;
1516         }
1517         for (;number < cl.num_entities;number++)
1518         {
1519                 if (cl.entities_active[number])
1520                 {
1521                         cl.entities_active[number] = false;
1522                         cl.entities[number].state_current.active = false;
1523                 }
1524         }
1525 }
1526
1527
1528 // (client) returns the frame number of the most recent frame recieved
1529 int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
1530 {
1531         if (d->numframes)
1532                 return d->frames[d->numframes - 1].framenum;
1533         else
1534                 return -1;
1535 }
1536
1537
1538
1539
1540
1541
1542 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
1543 {
1544         if (d->maxreferenceentities <= number)
1545         {
1546                 int oldmax = d->maxreferenceentities;
1547                 entity_state_t *oldentity = d->referenceentity;
1548                 d->maxreferenceentities = (number + 15) & ~7;
1549                 d->referenceentity = (entity_state_t *)Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
1550                 if (oldentity)
1551                 {
1552                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
1553                         Mem_Free(oldentity);
1554                 }
1555                 // clear the newly created entities
1556                 for (;oldmax < d->maxreferenceentities;oldmax++)
1557                 {
1558                         d->referenceentity[oldmax] = defaultstate;
1559                         d->referenceentity[oldmax].number = oldmax;
1560                 }
1561         }
1562         return d->referenceentity + number;
1563 }
1564
1565 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
1566 {
1567         // resize commit's entity list if full
1568         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
1569         {
1570                 entity_state_t *oldentity = d->currentcommit->entity;
1571                 d->currentcommit->maxentities += 8;
1572                 d->currentcommit->entity = (entity_state_t *)Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
1573                 if (oldentity)
1574                 {
1575                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
1576                         Mem_Free(oldentity);
1577                 }
1578         }
1579         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
1580 }
1581
1582 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
1583 {
1584         entityframe4_database_t *d;
1585         d = (entityframe4_database_t *)Mem_Alloc(pool, sizeof(*d));
1586         d->mempool = pool;
1587         EntityFrame4_ResetDatabase(d);
1588         return d;
1589 }
1590
1591 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
1592 {
1593         int i;
1594         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1595                 if (d->commit[i].entity)
1596                         Mem_Free(d->commit[i].entity);
1597         if (d->referenceentity)
1598                 Mem_Free(d->referenceentity);
1599         Mem_Free(d);
1600 }
1601
1602 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
1603 {
1604         int i;
1605         d->referenceframenum = -1;
1606         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1607                 d->commit[i].numentities = 0;
1608         for (i = 0;i < d->maxreferenceentities;i++)
1609                 d->referenceentity[i] = defaultstate;
1610 }
1611
1612 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
1613 {
1614         int i, j, found;
1615         entity_database4_commit_t *commit;
1616         if (framenum == -1)
1617         {
1618                 // reset reference, but leave commits alone
1619                 d->referenceframenum = -1;
1620                 for (i = 0;i < d->maxreferenceentities;i++)
1621                         d->referenceentity[i] = defaultstate;
1622                 // if this is the server, remove commits
1623                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1624                                 commit->numentities = 0;
1625                 found = true;
1626         }
1627         else if (d->referenceframenum == framenum)
1628                 found = true;
1629         else
1630         {
1631                 found = false;
1632                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1633                 {
1634                         if (commit->numentities && commit->framenum <= framenum)
1635                         {
1636                                 if (commit->framenum == framenum)
1637                                 {
1638                                         found = true;
1639                                         d->referenceframenum = framenum;
1640                                         if (developer_networkentities.integer >= 3)
1641                                         {
1642                                                 for (j = 0;j < commit->numentities;j++)
1643                                                 {
1644                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
1645                                                         if (commit->entity[j].active != s->active)
1646                                                         {
1647                                                                 if (commit->entity[j].active)
1648                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1649                                                                 else
1650                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1651                                                         }
1652                                                         *s = commit->entity[j];
1653                                                 }
1654                                         }
1655                                         else
1656                                                 for (j = 0;j < commit->numentities;j++)
1657                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
1658                                 }
1659                                 commit->numentities = 0;
1660                         }
1661                 }
1662         }
1663         if (developer_networkentities.integer >= 1)
1664         {
1665                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
1666                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1667                         if (d->commit[i].numentities)
1668                                 Con_Printf(" %i", d->commit[i].framenum);
1669                 Con_Print("\n");
1670         }
1671         return found;
1672 }
1673
1674 void EntityFrame4_CL_ReadFrame(void)
1675 {
1676         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
1677         entity_state_t *s;
1678         entityframe4_database_t *d;
1679         if (!cl.entitydatabase4)
1680                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cls.levelmempool);
1681         d = cl.entitydatabase4;
1682         // read the number of the frame this refers to
1683         referenceframenum = MSG_ReadLong();
1684         // read the number of this frame
1685         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1686                 cl.latestframenums[i] = cl.latestframenums[i+1];
1687         cl.latestframenums[LATESTFRAMENUMS-1] = framenum = MSG_ReadLong();
1688         // read the start number
1689         enumber = (unsigned short) MSG_ReadShort();
1690         if (developer_networkentities.integer >= 10)
1691         {
1692                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
1693                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1694                         if (d->commit[i].numentities)
1695                                 Con_Printf(" %i", d->commit[i].framenum);
1696                 Con_Print("\n");
1697         }
1698         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
1699         {
1700                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
1701                 skip = true;
1702         }
1703         d->currentcommit = NULL;
1704         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1705         {
1706                 if (!d->commit[i].numentities)
1707                 {
1708                         d->currentcommit = d->commit + i;
1709                         d->currentcommit->framenum = framenum;
1710                         d->currentcommit->numentities = 0;
1711                 }
1712         }
1713         if (d->currentcommit == NULL)
1714         {
1715                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
1716                 skip = true;
1717         }
1718         done = false;
1719         while (!done && !msg_badread)
1720         {
1721                 // read the number of the modified entity
1722                 // (gaps will be copied unmodified)
1723                 n = (unsigned short)MSG_ReadShort();
1724                 if (n == 0x8000)
1725                 {
1726                         // no more entities in this update, but we still need to copy the
1727                         // rest of the reference entities (final gap)
1728                         done = true;
1729                         // read end of range number, then process normally
1730                         n = (unsigned short)MSG_ReadShort();
1731                 }
1732                 // high bit means it's a remove message
1733                 cnumber = n & 0x7FFF;
1734                 // if this is a live entity we may need to expand the array
1735                 if (cl.num_entities <= cnumber && !(n & 0x8000))
1736                 {
1737                         cl.num_entities = cnumber + 1;
1738                         if (cnumber >= cl.max_entities)
1739                                 CL_ExpandEntities(cnumber);
1740                 }
1741                 // add one (the changed one) if not done
1742                 stopnumber = cnumber + !done;
1743                 // process entities in range from the last one to the changed one
1744                 for (;enumber < stopnumber;enumber++)
1745                 {
1746                         if (skip || enumber >= cl.num_entities)
1747                         {
1748                                 if (enumber == cnumber && (n & 0x8000) == 0)
1749                                 {
1750                                         entity_state_t tempstate;
1751                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
1752                                 }
1753                                 continue;
1754                         }
1755                         // slide the current into the previous slot
1756                         cl.entities[enumber].state_previous = cl.entities[enumber].state_current;
1757                         // copy a new current from reference database
1758                         cl.entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
1759                         s = &cl.entities[enumber].state_current;
1760                         // if this is the one to modify, read more data...
1761                         if (enumber == cnumber)
1762                         {
1763                                 if (n & 0x8000)
1764                                 {
1765                                         // simply removed
1766                                         if (developer_networkentities.integer >= 2)
1767                                                 Con_Printf("entity %i: remove\n", enumber);
1768                                         *s = defaultstate;
1769                                 }
1770                                 else
1771                                 {
1772                                         // read the changes
1773                                         if (developer_networkentities.integer >= 2)
1774                                                 Con_Printf("entity %i: update\n", enumber);
1775                                         s->active = true;
1776                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
1777                                 }
1778                         }
1779                         else if (developer_networkentities.integer >= 4)
1780                                 Con_Printf("entity %i: copy\n", enumber);
1781                         // set the cl.entities_active flag
1782                         cl.entities_active[enumber] = s->active;
1783                         // set the update time
1784                         s->time = cl.mtime[0];
1785                         // fix the number (it gets wiped occasionally by copying from defaultstate)
1786                         s->number = enumber;
1787                         // check if we need to update the lerp stuff
1788                         if (s->active)
1789                                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
1790                         // add this to the commit entry whether it is modified or not
1791                         if (d->currentcommit)
1792                                 EntityFrame4_AddCommitEntity(d, &cl.entities[enumber].state_current);
1793                         // print extra messages if desired
1794                         if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
1795                         {
1796                                 if (cl.entities[enumber].state_current.active)
1797                                         Con_Printf("entity #%i has become active\n", enumber);
1798                                 else if (cl.entities[enumber].state_previous.active)
1799                                         Con_Printf("entity #%i has become inactive\n", enumber);
1800                         }
1801                 }
1802         }
1803         d->currentcommit = NULL;
1804         if (skip)
1805                 EntityFrame4_ResetDatabase(d);
1806 }
1807
1808 void EntityFrame4_WriteFrame(sizebuf_t *msg, int maxsize, entityframe4_database_t *d, int numstates, const entity_state_t *states)
1809 {
1810         const entity_state_t *e, *s;
1811         entity_state_t inactiveentitystate;
1812         int i, n, startnumber;
1813         sizebuf_t buf;
1814         unsigned char data[128];
1815         prvm_eval_t *val;
1816
1817         // if there isn't enough space to accomplish anything, skip it
1818         if (msg->cursize + 24 > maxsize)
1819                 return;
1820
1821         // prepare the buffer
1822         memset(&buf, 0, sizeof(buf));
1823         buf.data = data;
1824         buf.maxsize = sizeof(data);
1825
1826         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1827                 if (!d->commit[i].numentities)
1828                         break;
1829         // if commit buffer full, just don't bother writing an update this frame
1830         if (i == MAX_ENTITY_HISTORY)
1831                 return;
1832         d->currentcommit = d->commit + i;
1833
1834         // this state's number gets played around with later
1835         inactiveentitystate = defaultstate;
1836
1837         d->currentcommit->numentities = 0;
1838         d->currentcommit->framenum = ++d->latestframenumber;
1839         MSG_WriteByte(msg, svc_entities);
1840         MSG_WriteLong(msg, d->referenceframenum);
1841         MSG_WriteLong(msg, d->currentcommit->framenum);
1842         if (developer_networkentities.integer >= 10)
1843         {
1844                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
1845                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1846                         if (d->commit[i].numentities)
1847                                 Con_Printf(" %i", d->commit[i].framenum);
1848                 Con_Print(")\n");
1849         }
1850         if (d->currententitynumber >= prog->max_edicts)
1851                 startnumber = 1;
1852         else
1853                 startnumber = bound(1, d->currententitynumber, prog->max_edicts - 1);
1854         MSG_WriteShort(msg, startnumber);
1855         // reset currententitynumber so if the loop does not break it we will
1856         // start at beginning next frame (if it does break, it will set it)
1857         d->currententitynumber = 1;
1858         for (i = 0, n = startnumber;n < prog->max_edicts;n++)
1859         {
1860                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[n]), prog->fieldoffsets.SendEntity);
1861                 if(val && val->function)
1862                         continue;
1863                 // find the old state to delta from
1864                 e = EntityFrame4_GetReferenceEntity(d, n);
1865                 // prepare the buffer
1866                 SZ_Clear(&buf);
1867                 // entity exists, build an update (if empty there is no change)
1868                 // find the state in the list
1869                 for (;i < numstates && states[i].number < n;i++);
1870                 // make the message
1871                 s = states + i;
1872                 if (s->number == n)
1873                 {
1874                         // build the update
1875                         EntityState_WriteUpdate(s, &buf, e);
1876                 }
1877                 else
1878                 {
1879                         inactiveentitystate.number = n;
1880                         s = &inactiveentitystate;
1881                         if (e->active)
1882                         {
1883                                 // entity used to exist but doesn't anymore, send remove
1884                                 MSG_WriteShort(&buf, n | 0x8000);
1885                         }
1886                 }
1887                 // if the commit is full, we're done this frame
1888                 if (msg->cursize + buf.cursize > maxsize - 4)
1889                 {
1890                         // next frame we will continue where we left off
1891                         break;
1892                 }
1893                 // add the entity to the commit
1894                 EntityFrame4_AddCommitEntity(d, s);
1895                 // if the message is empty, skip out now
1896                 if (buf.cursize)
1897                 {
1898                         // write the message to the packet
1899                         SZ_Write(msg, buf.data, buf.cursize);
1900                 }
1901         }
1902         d->currententitynumber = n;
1903
1904         // remove world message (invalid, and thus a good terminator)
1905         MSG_WriteShort(msg, 0x8000);
1906         // write the number of the end entity
1907         MSG_WriteShort(msg, d->currententitynumber);
1908         // just to be sure
1909         d->currentcommit = NULL;
1910 }
1911
1912
1913
1914
1915 entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
1916 {
1917         int i;
1918         entityframe5_database_t *d;
1919         d = (entityframe5_database_t *)Mem_Alloc(pool, sizeof(*d));
1920         d->latestframenum = 0;
1921         for (i = 0;i < d->maxedicts;i++)
1922                 d->states[i] = defaultstate;
1923         return d;
1924 }
1925
1926 void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
1927 {
1928         // all the [maxedicts] memory is allocated at once, so there's only one
1929         // thing to free
1930         if (d->maxedicts)
1931                 Mem_Free(d->deltabits);
1932         Mem_Free(d);
1933 }
1934
1935 static void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
1936 {
1937         if (d->maxedicts < newmax)
1938         {
1939                 unsigned char *data;
1940                 int oldmaxedicts = d->maxedicts;
1941                 int *olddeltabits = d->deltabits;
1942                 unsigned char *oldpriorities = d->priorities;
1943                 int *oldupdateframenum = d->updateframenum;
1944                 entity_state_t *oldstates = d->states;
1945                 unsigned char *oldvisiblebits = d->visiblebits;
1946                 d->maxedicts = newmax;
1947                 data = (unsigned char *)Mem_Alloc(sv_mempool, d->maxedicts * sizeof(int) + d->maxedicts * sizeof(unsigned char) + d->maxedicts * sizeof(int) + d->maxedicts * sizeof(entity_state_t) + (d->maxedicts+7)/8 * sizeof(unsigned char));
1948                 d->deltabits = (int *)data;data += d->maxedicts * sizeof(int);
1949                 d->priorities = (unsigned char *)data;data += d->maxedicts * sizeof(unsigned char);
1950                 d->updateframenum = (int *)data;data += d->maxedicts * sizeof(int);
1951                 d->states = (entity_state_t *)data;data += d->maxedicts * sizeof(entity_state_t);
1952                 d->visiblebits = (unsigned char *)data;data += (d->maxedicts+7)/8 * sizeof(unsigned char);
1953                 if (oldmaxedicts)
1954                 {
1955                         memcpy(d->deltabits, olddeltabits, oldmaxedicts * sizeof(int));
1956                         memcpy(d->priorities, oldpriorities, oldmaxedicts * sizeof(unsigned char));
1957                         memcpy(d->updateframenum, oldupdateframenum, oldmaxedicts * sizeof(int));
1958                         memcpy(d->states, oldstates, oldmaxedicts * sizeof(entity_state_t));
1959                         memcpy(d->visiblebits, oldvisiblebits, (oldmaxedicts+7)/8 * sizeof(unsigned char));
1960                         // the previous buffers were a single allocation, so just one free
1961                         Mem_Free(olddeltabits);
1962                 }
1963         }
1964 }
1965
1966 static int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
1967 {
1968         int limit, priority;
1969         entity_state_t *s;
1970         // if it is the player, update urgently
1971         if (stateindex == d->viewentnum)
1972                 return ENTITYFRAME5_PRIORITYLEVELS - 1;
1973         // priority increases each frame no matter what happens
1974         priority = d->priorities[stateindex] + 1;
1975         // players get an extra priority boost
1976         if (stateindex <= svs.maxclients)
1977                 priority++;
1978         // remove dead entities very quickly because they are just 2 bytes
1979         if (!d->states[stateindex].active)
1980         {
1981                 priority++;
1982                 return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
1983         }
1984         // certain changes are more noticable than others
1985         if (d->deltabits[stateindex] & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
1986                 priority++;
1987         // find the root entity this one is attached to, and judge relevance by it
1988         for (limit = 0;limit < 256;limit++)
1989         {
1990                 s = d->states + stateindex;
1991                 if (s->flags & RENDER_VIEWMODEL)
1992                         stateindex = d->viewentnum;
1993                 else if (s->tagentity)
1994                         stateindex = s->tagentity;
1995                 else
1996                         break;
1997                 if (d->maxedicts < stateindex)
1998                         EntityFrame5_ExpandEdicts(d, (stateindex+256)&~255);
1999         }
2000         if (limit >= 256)
2001                 Con_DPrintf("Protocol: Runaway loop recursing tagentity links on entity %i\n", stateindex);
2002         // now that we have the parent entity we can make some decisions based on
2003         // distance from the player
2004         if (VectorDistance(d->states[d->viewentnum].netcenter, s->netcenter) < 1024.0f)
2005                 priority++;
2006         return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
2007 }
2008
2009 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
2010 {
2011         unsigned int bits = 0;
2012         ENTITYSIZEPROFILING_START(msg, s->number);
2013
2014         prvm_eval_t *val;
2015         val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
2016         if(val && val->function)
2017                 return;
2018
2019         if (!s->active)
2020                 MSG_WriteShort(msg, number | 0x8000);
2021         else
2022         {
2023                 bits = changedbits;
2024                 if ((bits & E5_ORIGIN) && ((s->flags & RENDER_EXTERIORMODEL) || s->origin[0] <= -4096.0625 || s->origin[0] >= 4095.9375 || s->origin[1] <= -4096.0625 || s->origin[1] >= 4095.9375 || s->origin[2] <= -4096.0625 || s->origin[2] >= 4095.9375))
2025                         bits |= E5_ORIGIN32;
2026                         // possible values:
2027                         //   negative origin:
2028                         //     (int)(f * 8 - 0.5) >= -32768
2029                         //          (f * 8 - 0.5) >  -32769
2030                         //           f            >  -4096.0625
2031                         //   positive origin:
2032                         //     (int)(f * 8 + 0.5) <=  32767
2033                         //          (f * 8 + 0.5) <   32768
2034                         //           f * 8 + 0.5) <   4095.9375
2035                 if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
2036                         bits |= E5_ANGLES16;
2037                 if ((bits & E5_MODEL) && s->modelindex >= 256)
2038                         bits |= E5_MODEL16;
2039                 if ((bits & E5_FRAME) && s->frame >= 256)
2040                         bits |= E5_FRAME16;
2041                 if (bits & E5_EFFECTS)
2042                 {
2043                         if (s->effects & 0xFFFF0000)
2044                                 bits |= E5_EFFECTS32;
2045                         else if (s->effects & 0xFFFFFF00)
2046                                 bits |= E5_EFFECTS16;
2047                 }
2048                 if (bits >= 256)
2049                         bits |= E5_EXTEND1;
2050                 if (bits >= 65536)
2051                         bits |= E5_EXTEND2;
2052                 if (bits >= 16777216)
2053                         bits |= E5_EXTEND3;
2054                 MSG_WriteShort(msg, number);
2055                 MSG_WriteByte(msg, bits & 0xFF);
2056                 if (bits & E5_EXTEND1)
2057                         MSG_WriteByte(msg, (bits >> 8) & 0xFF);
2058                 if (bits & E5_EXTEND2)
2059                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
2060                 if (bits & E5_EXTEND3)
2061                         MSG_WriteByte(msg, (bits >> 24) & 0xFF);
2062                 if (bits & E5_FLAGS)
2063                         MSG_WriteByte(msg, s->flags);
2064                 if (bits & E5_ORIGIN)
2065                 {
2066                         if (bits & E5_ORIGIN32)
2067                         {
2068                                 MSG_WriteCoord32f(msg, s->origin[0]);
2069                                 MSG_WriteCoord32f(msg, s->origin[1]);
2070                                 MSG_WriteCoord32f(msg, s->origin[2]);
2071                         }
2072                         else
2073                         {
2074                                 MSG_WriteCoord13i(msg, s->origin[0]);
2075                                 MSG_WriteCoord13i(msg, s->origin[1]);
2076                                 MSG_WriteCoord13i(msg, s->origin[2]);
2077                         }
2078                 }
2079                 if (bits & E5_ANGLES)
2080                 {
2081                         if (bits & E5_ANGLES16)
2082                         {
2083                                 MSG_WriteAngle16i(msg, s->angles[0]);
2084                                 MSG_WriteAngle16i(msg, s->angles[1]);
2085                                 MSG_WriteAngle16i(msg, s->angles[2]);
2086                         }
2087                         else
2088                         {
2089                                 MSG_WriteAngle8i(msg, s->angles[0]);
2090                                 MSG_WriteAngle8i(msg, s->angles[1]);
2091                                 MSG_WriteAngle8i(msg, s->angles[2]);
2092                         }
2093                 }
2094                 if (bits & E5_MODEL)
2095                 {
2096                         if (bits & E5_MODEL16)
2097                                 MSG_WriteShort(msg, s->modelindex);
2098                         else
2099                                 MSG_WriteByte(msg, s->modelindex);
2100                 }
2101                 if (bits & E5_FRAME)
2102                 {
2103                         if (bits & E5_FRAME16)
2104                                 MSG_WriteShort(msg, s->frame);
2105                         else
2106                                 MSG_WriteByte(msg, s->frame);
2107                 }
2108                 if (bits & E5_SKIN)
2109                         MSG_WriteByte(msg, s->skin);
2110                 if (bits & E5_EFFECTS)
2111                 {
2112                         if (bits & E5_EFFECTS32)
2113                                 MSG_WriteLong(msg, s->effects);
2114                         else if (bits & E5_EFFECTS16)
2115                                 MSG_WriteShort(msg, s->effects);
2116                         else
2117                                 MSG_WriteByte(msg, s->effects);
2118                 }
2119                 if (bits & E5_ALPHA)
2120                         MSG_WriteByte(msg, s->alpha);
2121                 if (bits & E5_SCALE)
2122                         MSG_WriteByte(msg, s->scale);
2123                 if (bits & E5_COLORMAP)
2124                         MSG_WriteByte(msg, s->colormap);
2125                 if (bits & E5_ATTACHMENT)
2126                 {
2127                         MSG_WriteShort(msg, s->tagentity);
2128                         MSG_WriteByte(msg, s->tagindex);
2129                 }
2130                 if (bits & E5_LIGHT)
2131                 {
2132                         MSG_WriteShort(msg, s->light[0]);
2133                         MSG_WriteShort(msg, s->light[1]);
2134                         MSG_WriteShort(msg, s->light[2]);
2135                         MSG_WriteShort(msg, s->light[3]);
2136                         MSG_WriteByte(msg, s->lightstyle);
2137                         MSG_WriteByte(msg, s->lightpflags);
2138                 }
2139                 if (bits & E5_GLOW)
2140                 {
2141                         MSG_WriteByte(msg, s->glowsize);
2142                         MSG_WriteByte(msg, s->glowcolor);
2143                 }
2144                 if (bits & E5_COLORMOD)
2145                 {
2146                         MSG_WriteByte(msg, s->colormod[0]);
2147                         MSG_WriteByte(msg, s->colormod[1]);
2148                         MSG_WriteByte(msg, s->colormod[2]);
2149                 }
2150         }
2151
2152         ENTITYSIZEPROFILING_END(msg, s->number);
2153 }
2154
2155 static void EntityState5_ReadUpdate(entity_state_t *s, int number)
2156 {
2157         int bits;
2158         bits = MSG_ReadByte();
2159         if (bits & E5_EXTEND1)
2160         {
2161                 bits |= MSG_ReadByte() << 8;
2162                 if (bits & E5_EXTEND2)
2163                 {
2164                         bits |= MSG_ReadByte() << 16;
2165                         if (bits & E5_EXTEND3)
2166                                 bits |= MSG_ReadByte() << 24;
2167                 }
2168         }
2169         if (bits & E5_FULLUPDATE)
2170         {
2171                 *s = defaultstate;
2172                 s->active = true;
2173         }
2174         if (bits & E5_FLAGS)
2175                 s->flags = MSG_ReadByte();
2176         if (bits & E5_ORIGIN)
2177         {
2178                 if (bits & E5_ORIGIN32)
2179                 {
2180                         s->origin[0] = MSG_ReadCoord32f();
2181                         s->origin[1] = MSG_ReadCoord32f();
2182                         s->origin[2] = MSG_ReadCoord32f();
2183                 }
2184                 else
2185                 {
2186                         s->origin[0] = MSG_ReadCoord13i();
2187                         s->origin[1] = MSG_ReadCoord13i();
2188                         s->origin[2] = MSG_ReadCoord13i();
2189                 }
2190         }
2191         if (bits & E5_ANGLES)
2192         {
2193                 if (bits & E5_ANGLES16)
2194                 {
2195                         s->angles[0] = MSG_ReadAngle16i();
2196                         s->angles[1] = MSG_ReadAngle16i();
2197                         s->angles[2] = MSG_ReadAngle16i();
2198                 }
2199                 else
2200                 {
2201                         s->angles[0] = MSG_ReadAngle8i();
2202                         s->angles[1] = MSG_ReadAngle8i();
2203                         s->angles[2] = MSG_ReadAngle8i();
2204                 }
2205         }
2206         if (bits & E5_MODEL)
2207         {
2208                 if (bits & E5_MODEL16)
2209                         s->modelindex = (unsigned short) MSG_ReadShort();
2210                 else
2211                         s->modelindex = MSG_ReadByte();
2212         }
2213         if (bits & E5_FRAME)
2214         {
2215                 if (bits & E5_FRAME16)
2216                         s->frame = (unsigned short) MSG_ReadShort();
2217                 else
2218                         s->frame = MSG_ReadByte();
2219         }
2220         if (bits & E5_SKIN)
2221                 s->skin = MSG_ReadByte();
2222         if (bits & E5_EFFECTS)
2223         {
2224                 if (bits & E5_EFFECTS32)
2225                         s->effects = (unsigned int) MSG_ReadLong();
2226                 else if (bits & E5_EFFECTS16)
2227                         s->effects = (unsigned short) MSG_ReadShort();
2228                 else
2229                         s->effects = MSG_ReadByte();
2230         }
2231         if (bits & E5_ALPHA)
2232                 s->alpha = MSG_ReadByte();
2233         if (bits & E5_SCALE)
2234                 s->scale = MSG_ReadByte();
2235         if (bits & E5_COLORMAP)
2236                 s->colormap = MSG_ReadByte();
2237         if (bits & E5_ATTACHMENT)
2238         {
2239                 s->tagentity = (unsigned short) MSG_ReadShort();
2240                 s->tagindex = MSG_ReadByte();
2241         }
2242         if (bits & E5_LIGHT)
2243         {
2244                 s->light[0] = (unsigned short) MSG_ReadShort();
2245                 s->light[1] = (unsigned short) MSG_ReadShort();
2246                 s->light[2] = (unsigned short) MSG_ReadShort();
2247                 s->light[3] = (unsigned short) MSG_ReadShort();
2248                 s->lightstyle = MSG_ReadByte();
2249                 s->lightpflags = MSG_ReadByte();
2250         }
2251         if (bits & E5_GLOW)
2252         {
2253                 s->glowsize = MSG_ReadByte();
2254                 s->glowcolor = MSG_ReadByte();
2255         }
2256         if (bits & E5_COLORMOD)
2257         {
2258                 s->colormod[0] = MSG_ReadByte();
2259                 s->colormod[1] = MSG_ReadByte();
2260                 s->colormod[2] = MSG_ReadByte();
2261         }
2262
2263
2264         if (developer_networkentities.integer >= 2)
2265         {
2266                 Con_Printf("ReadFields e%i", number);
2267
2268                 if (bits & E5_ORIGIN)
2269                         Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
2270                 if (bits & E5_ANGLES)
2271                         Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
2272                 if (bits & E5_MODEL)
2273                         Con_Printf(" E5_MODEL %i", s->modelindex);
2274                 if (bits & E5_FRAME)
2275                         Con_Printf(" E5_FRAME %i", s->frame);
2276                 if (bits & E5_SKIN)
2277                         Con_Printf(" E5_SKIN %i", s->skin);
2278                 if (bits & E5_EFFECTS)
2279                         Con_Printf(" E5_EFFECTS %i", s->effects);
2280                 if (bits & E5_FLAGS)
2281                 {
2282                         Con_Printf(" E5_FLAGS %i (", s->flags);
2283                         if (s->flags & RENDER_STEP)
2284                                 Con_Print(" STEP");
2285                         if (s->flags & RENDER_GLOWTRAIL)
2286                                 Con_Print(" GLOWTRAIL");
2287                         if (s->flags & RENDER_VIEWMODEL)
2288                                 Con_Print(" VIEWMODEL");
2289                         if (s->flags & RENDER_EXTERIORMODEL)
2290                                 Con_Print(" EXTERIORMODEL");
2291                         if (s->flags & RENDER_LOWPRECISION)
2292                                 Con_Print(" LOWPRECISION");
2293                         if (s->flags & RENDER_COLORMAPPED)
2294                                 Con_Print(" COLORMAPPED");
2295                         if (s->flags & RENDER_SHADOW)
2296                                 Con_Print(" SHADOW");
2297                         if (s->flags & RENDER_LIGHT)
2298                                 Con_Print(" LIGHT");
2299                         if (s->flags & RENDER_NOSELFSHADOW)
2300                                 Con_Print(" NOSELFSHADOW");
2301                         Con_Print(")");
2302                 }
2303                 if (bits & E5_ALPHA)
2304                         Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
2305                 if (bits & E5_SCALE)
2306                         Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
2307                 if (bits & E5_COLORMAP)
2308                         Con_Printf(" E5_COLORMAP %i", s->colormap);
2309                 if (bits & E5_ATTACHMENT)
2310                         Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
2311                 if (bits & E5_LIGHT)
2312                         Con_Printf(" E5_LIGHT %i:%i:%i:%i %i:%i", s->light[0], s->light[1], s->light[2], s->light[3], s->lightstyle, s->lightpflags);
2313                 if (bits & E5_GLOW)
2314                         Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
2315                 if (bits & E5_COLORMOD)
2316                         Con_Printf(" E5_COLORMOD %f:%f:%f", s->colormod[0] / 32.0f, s->colormod[1] / 32.0f, s->colormod[2] / 32.0f);
2317                 Con_Print("\n");
2318         }
2319 }
2320
2321 static int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
2322 {
2323         unsigned int bits = 0;
2324         if (n->active)
2325         {
2326                 if (!o->active)
2327                         bits |= E5_FULLUPDATE;
2328                 if (!VectorCompare(o->origin, n->origin))
2329                         bits |= E5_ORIGIN;
2330                 if (!VectorCompare(o->angles, n->angles))
2331                         bits |= E5_ANGLES;
2332                 if (o->modelindex != n->modelindex)
2333                         bits |= E5_MODEL;
2334                 if (o->frame != n->frame)
2335                         bits |= E5_FRAME;
2336                 if (o->skin != n->skin)
2337                         bits |= E5_SKIN;
2338                 if (o->effects != n->effects)
2339                         bits |= E5_EFFECTS;
2340                 if (o->flags != n->flags)
2341                         bits |= E5_FLAGS;
2342                 if (o->alpha != n->alpha)
2343                         bits |= E5_ALPHA;
2344                 if (o->scale != n->scale)
2345                         bits |= E5_SCALE;
2346                 if (o->colormap != n->colormap)
2347                         bits |= E5_COLORMAP;
2348                 if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
2349                         bits |= E5_ATTACHMENT;
2350                 if (o->light[0] != n->light[0] || o->light[1] != n->light[1] || o->light[2] != n->light[2] || o->light[3] != n->light[3] || o->lightstyle != n->lightstyle || o->lightpflags != n->lightpflags)
2351                         bits |= E5_LIGHT;
2352                 if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
2353                         bits |= E5_GLOW;
2354                 if (o->colormod[0] != n->colormod[0] || o->colormod[1] != n->colormod[1] || o->colormod[2] != n->colormod[2])
2355                         bits |= E5_COLORMOD;
2356         }
2357         else
2358                 if (o->active)
2359                         bits |= E5_FULLUPDATE;
2360         return bits;
2361 }
2362
2363 void EntityFrame5_CL_ReadFrame(void)
2364 {
2365         int i, n, enumber;
2366         entity_t *ent;
2367         entity_state_t *s;
2368         // read the number of this frame to echo back in next input packet
2369         for (i = 0;i < LATESTFRAMENUMS-1;i++)
2370                 cl.latestframenums[i] = cl.latestframenums[i+1];
2371         cl.latestframenums[LATESTFRAMENUMS-1] = MSG_ReadLong();
2372         if (developer_networkentities.integer >= 10)
2373                 Con_Printf("recv: svc_entities %i\n", cl.latestframenums[LATESTFRAMENUMS-1]);
2374         if (cls.protocol != PROTOCOL_QUAKE && cls.protocol != PROTOCOL_QUAKEDP && cls.protocol != PROTOCOL_NEHAHRAMOVIE && cls.protocol != PROTOCOL_DARKPLACES1 && cls.protocol != PROTOCOL_DARKPLACES2 && cls.protocol != PROTOCOL_DARKPLACES3 && cls.protocol != PROTOCOL_DARKPLACES4 && cls.protocol != PROTOCOL_DARKPLACES5 && cls.protocol != PROTOCOL_DARKPLACES6)
2375                 cls.servermovesequence = MSG_ReadLong();
2376         // read entity numbers until we find a 0x8000
2377         // (which would be remove world entity, but is actually a terminator)
2378         while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
2379         {
2380                 // get the entity number
2381                 enumber = n & 0x7FFF;
2382                 // we may need to expand the array
2383                 if (cl.num_entities <= enumber)
2384                 {
2385                         cl.num_entities = enumber + 1;
2386                         if (enumber >= cl.max_entities)
2387                                 CL_ExpandEntities(enumber);
2388                 }
2389                 // look up the entity
2390                 ent = cl.entities + enumber;
2391                 // slide the current into the previous slot
2392                 ent->state_previous = ent->state_current;
2393                 // read the update
2394                 s = &ent->state_current;
2395                 if (n & 0x8000)
2396                 {
2397                         // remove entity
2398                         *s = defaultstate;
2399                 }
2400                 else
2401                 {
2402                         // update entity
2403                         EntityState5_ReadUpdate(s, enumber);
2404                 }
2405                 // set the cl.entities_active flag
2406                 cl.entities_active[enumber] = s->active;
2407                 // set the update time
2408                 s->time = cl.mtime[0];
2409                 // fix the number (it gets wiped occasionally by copying from defaultstate)
2410                 s->number = enumber;
2411                 // check if we need to update the lerp stuff
2412                 if (s->active)
2413                         CL_MoveLerpEntityStates(&cl.entities[enumber]);
2414                 // print extra messages if desired
2415                 if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
2416                 {
2417                         if (cl.entities[enumber].state_current.active)
2418                                 Con_Printf("entity #%i has become active\n", enumber);
2419                         else if (cl.entities[enumber].state_previous.active)
2420                                 Con_Printf("entity #%i has become inactive\n", enumber);
2421                 }
2422         }
2423 }
2424
2425 void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum)
2426 {
2427         int i, j, k, l, bits;
2428         entityframe5_changestate_t *s, *s2;
2429         entityframe5_packetlog_t *p, *p2;
2430         unsigned char statsdeltabits[(MAX_CL_STATS+7)/8];
2431         // scan for packets that were lost
2432         for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
2433         {
2434                 if (p->packetnumber && p->packetnumber <= framenum)
2435                 {
2436                         // packet was lost - merge deltabits into the main array so they
2437                         // will be re-sent, but only if there is no newer update of that
2438                         // bit in the logs (as those will arrive before this update)
2439                         for (j = 0, s = p->states;j < p->numstates;j++, s++)
2440                         {
2441                                 // check for any newer updates to this entity and mask off any
2442                                 // overlapping bits (we don't need to send something again if
2443                                 // it has already been sent more recently)
2444                                 bits = s->bits & ~d->deltabits[s->number];
2445                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
2446                                 {
2447                                         if (p2->packetnumber > framenum)
2448                                         {
2449                                                 for (l = 0, s2 = p2->states;l < p2->numstates;l++, s2++)
2450                                                 {
2451                                                         if (s2->number == s->number)
2452                                                         {
2453                                                                 bits &= ~s2->bits;
2454                                                                 break;
2455                                                         }
2456                                                 }
2457                                         }
2458                                 }
2459                                 // if the bits haven't all been cleared, there were some bits
2460                                 // lost with this packet, so set them again now
2461                                 if (bits)
2462                                 {
2463                                         d->deltabits[s->number] |= bits;
2464                                         // if it was a very important update, set priority higher
2465                                         if (bits & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_COLORMAP))
2466                                                 d->priorities[s->number] = max(d->priorities[s->number], 4);
2467                                         else
2468                                                 d->priorities[s->number] = max(d->priorities[s->number], 1);
2469                                 }
2470                         }
2471                         // mark lost stats
2472                         for (j = 0;j < MAX_CL_STATS;j++)
2473                         {
2474                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2475                                         statsdeltabits[l] = p->statsdeltabits[l] & ~host_client->statsdeltabits[l];
2476                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS;k++, p2++)
2477                                         if (p2->packetnumber > framenum)
2478                                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2479                                                         statsdeltabits[l] = p->statsdeltabits[l] & ~p2->statsdeltabits[l];
2480                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2481                                         host_client->statsdeltabits[l] |= statsdeltabits[l];
2482                         }
2483                         // delete this packet log as it is now obsolete
2484                         p->packetnumber = 0;
2485                 }
2486         }
2487 }
2488
2489 void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
2490 {
2491         int i;
2492         // scan for packets made obsolete by this ack and delete them
2493         for (i = 0;i < ENTITYFRAME5_MAXPACKETLOGS;i++)
2494                 if (d->packetlog[i].packetnumber <= framenum)
2495                         d->packetlog[i].packetnumber = 0;
2496 }
2497
2498 void EntityFrame5_WriteFrame(sizebuf_t *msg, int maxsize, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int movesequence)
2499 {
2500         const entity_state_t *n;
2501         int i, num, l, framenum, packetlognumber, priority;
2502         sizebuf_t buf;
2503         unsigned char data[128];
2504         entityframe5_packetlog_t *packetlog;
2505
2506         if (prog->max_edicts > d->maxedicts)
2507                 EntityFrame5_ExpandEdicts(d, prog->max_edicts);
2508
2509         framenum = d->latestframenum + 1;
2510         d->viewentnum = viewentnum;
2511
2512         // if packet log is full, mark all frames as lost, this will cause
2513         // it to send the lost data again
2514         for (packetlognumber = 0;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++)
2515                 if (d->packetlog[packetlognumber].packetnumber == 0)
2516                         break;
2517         if (packetlognumber == ENTITYFRAME5_MAXPACKETLOGS)
2518         {
2519                 Con_DPrintf("EntityFrame5_WriteFrame: packetlog overflow for a client, resetting\n");
2520                 EntityFrame5_LostFrame(d, framenum);
2521                 packetlognumber = 0;
2522         }
2523
2524         // prepare the buffer
2525         memset(&buf, 0, sizeof(buf));
2526         buf.data = data;
2527         buf.maxsize = sizeof(data);
2528
2529         // detect changes in states
2530         num = 1;
2531         for (i = 0, n = states;i < numstates;i++, n++)
2532         {
2533                 // mark gaps in entity numbering as removed entities
2534                 for (;num < n->number;num++)
2535                 {
2536                         // if the entity used to exist, clear it
2537                         if (CHECKPVSBIT(d->visiblebits, num))
2538                         {
2539                                 CLEARPVSBIT(d->visiblebits, num);
2540                                 d->deltabits[num] = E5_FULLUPDATE;
2541                                 d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2542                                 d->states[num] = defaultstate;
2543                                 d->states[num].number = num;
2544                         }
2545                 }
2546                 // update the entity state data
2547                 if (!CHECKPVSBIT(d->visiblebits, num))
2548                 {
2549                         // entity just spawned in, don't let it completely hog priority
2550                         // because of being ancient on the first frame
2551                         d->updateframenum[num] = framenum;
2552                         // initial priority is a bit high to make projectiles send on the
2553                         // first frame, among other things
2554                         d->priorities[num] = max(d->priorities[num], 4);
2555                 }
2556                 SETPVSBIT(d->visiblebits, num);
2557                 d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
2558                 d->priorities[num] = max(d->priorities[num], 1);
2559                 d->states[num] = *n;
2560                 d->states[num].number = num;
2561                 // advance to next entity so the next iteration doesn't immediately remove it
2562                 num++;
2563         }
2564         // all remaining entities are dead
2565         for (;num < d->maxedicts;num++)
2566         {
2567                 if (CHECKPVSBIT(d->visiblebits, num))
2568                 {
2569                         CLEARPVSBIT(d->visiblebits, num);
2570                         d->deltabits[num] = E5_FULLUPDATE;
2571                         d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2572                         d->states[num] = defaultstate;
2573                         d->states[num].number = num;
2574                 }
2575         }
2576
2577         // if there isn't at least enough room for an empty svc_entities,
2578         // don't bother trying...
2579         if (buf.cursize + 11 > buf.maxsize)
2580                 return;
2581
2582         // build lists of entities by priority level
2583         memset(d->prioritychaincounts, 0, sizeof(d->prioritychaincounts));
2584         l = 0;
2585         for (num = 0;num < d->maxedicts;num++)
2586         {
2587                 if (d->priorities[num])
2588                 {
2589                         if (d->deltabits[num])
2590                         {
2591                                 if (d->priorities[num] < (ENTITYFRAME5_PRIORITYLEVELS - 1))
2592                                         d->priorities[num] = EntityState5_Priority(d, num);
2593                                 l = num;
2594                                 priority = d->priorities[num];
2595                                 if (d->prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
2596                                         d->prioritychains[priority][d->prioritychaincounts[priority]++] = num;
2597                         }
2598                         else
2599                                 d->priorities[num] = 0;
2600                 }
2601         }
2602
2603         // add packetlog entry
2604         packetlog = d->packetlog + packetlognumber;
2605         packetlog->packetnumber = framenum;
2606         packetlog->numstates = 0;
2607         // write stat updates
2608         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)
2609         {
2610                 for (i = 0;i < MAX_CL_STATS && msg->cursize + 6 + 11 <= maxsize;i++)
2611                 {
2612                         if (host_client->statsdeltabits[i>>3] & (1<<(i&7)))
2613                         {
2614                                 host_client->statsdeltabits[i>>3] &= ~(1<<(i&7));
2615                                 packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
2616                                 if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
2617                                 {
2618                                         MSG_WriteByte(msg, svc_updatestatubyte);
2619                                         MSG_WriteByte(msg, i);
2620                                         MSG_WriteByte(msg, host_client->stats[i]);
2621                                 }
2622                                 else
2623                                 {
2624                                         MSG_WriteByte(msg, svc_updatestat);
2625                                         MSG_WriteByte(msg, i);
2626                                         MSG_WriteLong(msg, host_client->stats[i]);
2627                                 }
2628                         }
2629                 }
2630         }
2631         // write state updates
2632         if (developer_networkentities.integer >= 10)
2633                 Con_Printf("send: svc_entities %i\n", framenum);
2634         d->latestframenum = framenum;
2635         MSG_WriteByte(msg, svc_entities);
2636         MSG_WriteLong(msg, framenum);
2637         if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5 && sv.protocol != PROTOCOL_DARKPLACES6)
2638                 MSG_WriteLong(msg, movesequence);
2639         for (priority = ENTITYFRAME5_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
2640         {
2641                 for (i = 0;i < d->prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
2642                 {
2643                         num = d->prioritychains[priority][i];
2644                         n = d->states + num;
2645                         if (d->deltabits[num] & E5_FULLUPDATE)
2646                                 d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
2647                         buf.cursize = 0;
2648                         EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
2649                         // if the entity won't fit, try the next one
2650                         if (msg->cursize + buf.cursize + 2 > maxsize)
2651                                 continue;
2652                         // write entity to the packet
2653                         SZ_Write(msg, buf.data, buf.cursize);
2654                         // mark age on entity for prioritization
2655                         d->updateframenum[num] = framenum;
2656                         // log entity so deltabits can be restored later if lost
2657                         packetlog->states[packetlog->numstates].number = num;
2658                         packetlog->states[packetlog->numstates].bits = d->deltabits[num];
2659                         packetlog->numstates++;
2660                         // clear deltabits and priority so it won't be sent again
2661                         d->deltabits[num] = 0;
2662                         d->priorities[num] = 0;
2663                 }
2664         }
2665         MSG_WriteShort(msg, 0x8000);
2666 }
2667
2668
2669 static void QW_TranslateEffects(entity_state_t *s, int qweffects)
2670 {
2671         s->effects = 0;
2672         s->internaleffects = 0;
2673         if (qweffects & QW_EF_BRIGHTFIELD)
2674                 s->effects |= EF_BRIGHTFIELD;
2675         if (qweffects & QW_EF_MUZZLEFLASH)
2676                 s->effects |= EF_MUZZLEFLASH;
2677         if (qweffects & QW_EF_FLAG1)
2678         {
2679                 // mimic FTEQW's interpretation of EF_FLAG1 as EF_NODRAW on non-player entities
2680                 if (s->number > cl.maxclients)
2681                         s->effects |= EF_NODRAW;
2682                 else
2683                         s->internaleffects |= INTEF_FLAG1QW;
2684         }
2685         if (qweffects & QW_EF_FLAG2)
2686         {
2687                 // mimic FTEQW's interpretation of EF_FLAG2 as EF_ADDITIVE on non-player entities
2688                 if (s->number > cl.maxclients)
2689                         s->effects |= EF_ADDITIVE;
2690                 else
2691                         s->internaleffects |= INTEF_FLAG2QW;
2692         }
2693         if (qweffects & QW_EF_RED)
2694         {
2695                 if (qweffects & QW_EF_BLUE)
2696                         s->effects |= EF_RED | EF_BLUE;
2697                 else
2698                         s->effects |= EF_RED;
2699         }
2700         else if (qweffects & QW_EF_BLUE)
2701                 s->effects |= EF_BLUE;
2702         else if (qweffects & QW_EF_BRIGHTLIGHT)
2703                 s->effects |= EF_BRIGHTLIGHT;
2704         else if (qweffects & QW_EF_DIMLIGHT)
2705                 s->effects |= EF_DIMLIGHT;
2706 }
2707
2708 void EntityStateQW_ReadPlayerUpdate(void)
2709 {
2710         int slot = MSG_ReadByte();
2711         int enumber = slot + 1;
2712         int weaponframe;
2713         int msec;
2714         int playerflags;
2715         int bits;
2716         entity_state_t *s;
2717         // look up the entity
2718         entity_t *ent = cl.entities + enumber;
2719         vec3_t viewangles;
2720         vec3_t velocity;
2721
2722         // slide the current state into the previous
2723         ent->state_previous = ent->state_current;
2724
2725         // read the update
2726         s = &ent->state_current;
2727         *s = defaultstate;
2728         s->active = true;
2729         s->number = enumber;
2730         s->colormap = enumber;
2731         playerflags = MSG_ReadShort();
2732         MSG_ReadVector(s->origin, cls.protocol);
2733         s->frame = MSG_ReadByte();
2734
2735         VectorClear(viewangles);
2736         VectorClear(velocity);
2737
2738         if (playerflags & QW_PF_MSEC)
2739         {
2740                 // time difference between last update this player sent to the server,
2741                 // and last input we sent to the server (this packet is in response to
2742                 // our input, so msec is how long ago the last update of this player
2743                 // entity occurred, compared to our input being received)
2744                 msec = MSG_ReadByte();
2745         }
2746         else
2747                 msec = 0;
2748         if (playerflags & QW_PF_COMMAND)
2749         {
2750                 bits = MSG_ReadByte();
2751                 if (bits & QW_CM_ANGLE1)
2752                         viewangles[0] = MSG_ReadAngle16i(); // cmd->angles[0]
2753                 if (bits & QW_CM_ANGLE2)
2754                         viewangles[1] = MSG_ReadAngle16i(); // cmd->angles[1]
2755                 if (bits & QW_CM_ANGLE3)
2756                         viewangles[2] = MSG_ReadAngle16i(); // cmd->angles[2]
2757                 if (bits & QW_CM_FORWARD)
2758                         MSG_ReadShort(); // cmd->forwardmove
2759                 if (bits & QW_CM_SIDE)
2760                         MSG_ReadShort(); // cmd->sidemove
2761                 if (bits & QW_CM_UP)
2762                         MSG_ReadShort(); // cmd->upmove
2763                 if (bits & QW_CM_BUTTONS)
2764                         MSG_ReadByte(); // cmd->buttons
2765                 if (bits & QW_CM_IMPULSE)
2766                         MSG_ReadByte(); // cmd->impulse
2767                 MSG_ReadByte(); // cmd->msec
2768         }
2769         if (playerflags & QW_PF_VELOCITY1)
2770                 velocity[0] = MSG_ReadShort();
2771         if (playerflags & QW_PF_VELOCITY2)
2772                 velocity[1] = MSG_ReadShort();
2773         if (playerflags & QW_PF_VELOCITY3)
2774                 velocity[2] = MSG_ReadShort();
2775         if (playerflags & QW_PF_MODEL)
2776                 s->modelindex = MSG_ReadByte();
2777         else
2778                 s->modelindex = cl.qw_modelindex_player;
2779         if (playerflags & QW_PF_SKINNUM)
2780                 s->skin = MSG_ReadByte();
2781         if (playerflags & QW_PF_EFFECTS)
2782                 QW_TranslateEffects(s, MSG_ReadByte());
2783         if (playerflags & QW_PF_WEAPONFRAME)
2784                 weaponframe = MSG_ReadByte();
2785         else
2786                 weaponframe = 0;
2787
2788         if (enumber == cl.playerentity)
2789         {
2790                 // if this is an update on our player, update the angles
2791                 VectorCopy(cl.viewangles, viewangles);
2792         }
2793
2794         // calculate the entity angles from the viewangles
2795         s->angles[0] = viewangles[0] * -0.0333;
2796         s->angles[1] = viewangles[1];
2797         s->angles[2] = 0;
2798         s->angles[2] = V_CalcRoll(s->angles, velocity)*4;
2799
2800         // if this is an update on our player, update interpolation state
2801         if (enumber == cl.playerentity)
2802         {
2803                 VectorCopy (cl.mpunchangle[0], cl.mpunchangle[1]);
2804                 VectorCopy (cl.mpunchvector[0], cl.mpunchvector[1]);
2805                 VectorCopy (cl.mvelocity[0], cl.mvelocity[1]);
2806                 cl.mviewzoom[1] = cl.mviewzoom[0];
2807
2808                 cl.idealpitch = 0;
2809                 cl.mpunchangle[0][0] = 0;
2810                 cl.mpunchangle[0][1] = 0;
2811                 cl.mpunchangle[0][2] = 0;
2812                 cl.mpunchvector[0][0] = 0;
2813                 cl.mpunchvector[0][1] = 0;
2814                 cl.mpunchvector[0][2] = 0;
2815                 cl.mvelocity[0][0] = 0;
2816                 cl.mvelocity[0][1] = 0;
2817                 cl.mvelocity[0][2] = 0;
2818                 cl.mviewzoom[0] = 1;
2819
2820                 VectorCopy(velocity, cl.mvelocity[0]);
2821                 cl.stats[STAT_WEAPONFRAME] = weaponframe;
2822                 if (playerflags & QW_PF_GIB)
2823                         cl.stats[STAT_VIEWHEIGHT] = 8;
2824                 else if (playerflags & QW_PF_DEAD)
2825                         cl.stats[STAT_VIEWHEIGHT] = -16;
2826                 else
2827                         cl.stats[STAT_VIEWHEIGHT] = 22;
2828         }
2829
2830         // set the cl.entities_active flag
2831         cl.entities_active[enumber] = s->active;
2832         // set the update time
2833         s->time = cl.mtime[0] - msec * 0.001; // qw has no clock
2834         // check if we need to update the lerp stuff
2835         if (s->active)
2836                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
2837 }
2838
2839 static void EntityStateQW_ReadEntityUpdate(entity_state_t *s, int bits)
2840 {
2841         int qweffects = 0;
2842         s->active = true;
2843         s->number = bits & 511;
2844         bits &= ~511;
2845         if (bits & QW_U_MOREBITS)
2846                 bits |= MSG_ReadByte();
2847
2848         // store the QW_U_SOLID bit here?
2849
2850         if (bits & QW_U_MODEL)
2851                 s->modelindex = MSG_ReadByte();
2852         if (bits & QW_U_FRAME)
2853                 s->frame = MSG_ReadByte();
2854         if (bits & QW_U_COLORMAP)
2855                 s->colormap = MSG_ReadByte();
2856         if (bits & QW_U_SKIN)
2857                 s->skin = MSG_ReadByte();
2858         if (bits & QW_U_EFFECTS)
2859                 QW_TranslateEffects(s, qweffects = MSG_ReadByte());
2860         if (bits & QW_U_ORIGIN1)
2861                 s->origin[0] = MSG_ReadCoord13i();
2862         if (bits & QW_U_ANGLE1)
2863                 s->angles[0] = MSG_ReadAngle8i();
2864         if (bits & QW_U_ORIGIN2)
2865                 s->origin[1] = MSG_ReadCoord13i();
2866         if (bits & QW_U_ANGLE2)
2867                 s->angles[1] = MSG_ReadAngle8i();
2868         if (bits & QW_U_ORIGIN3)
2869                 s->origin[2] = MSG_ReadCoord13i();
2870         if (bits & QW_U_ANGLE3)
2871                 s->angles[2] = MSG_ReadAngle8i();
2872
2873         if (developer_networkentities.integer >= 2)
2874         {
2875                 Con_Printf("ReadFields e%i", s->number);
2876                 if (bits & QW_U_MODEL)
2877                         Con_Printf(" U_MODEL %i", s->modelindex);
2878                 if (bits & QW_U_FRAME)
2879                         Con_Printf(" U_FRAME %i", s->frame);
2880                 if (bits & QW_U_COLORMAP)
2881                         Con_Printf(" U_COLORMAP %i", s->colormap);
2882                 if (bits & QW_U_SKIN)
2883                         Con_Printf(" U_SKIN %i", s->skin);
2884                 if (bits & QW_U_EFFECTS)
2885                         Con_Printf(" U_EFFECTS %i", qweffects);
2886                 if (bits & QW_U_ORIGIN1)
2887                         Con_Printf(" U_ORIGIN1 %f", s->origin[0]);
2888                 if (bits & QW_U_ANGLE1)
2889                         Con_Printf(" U_ANGLE1 %f", s->angles[0]);
2890                 if (bits & QW_U_ORIGIN2)
2891                         Con_Printf(" U_ORIGIN2 %f", s->origin[1]);
2892                 if (bits & QW_U_ANGLE2)
2893                         Con_Printf(" U_ANGLE2 %f", s->angles[1]);
2894                 if (bits & QW_U_ORIGIN3)
2895                         Con_Printf(" U_ORIGIN3 %f", s->origin[2]);
2896                 if (bits & QW_U_ANGLE3)
2897                         Con_Printf(" U_ANGLE3 %f", s->angles[2]);
2898                 if (bits & QW_U_SOLID)
2899                         Con_Printf(" U_SOLID");
2900                 Con_Print("\n");
2901         }
2902 }
2903
2904 entityframeqw_database_t *EntityFrameQW_AllocDatabase(mempool_t *pool)
2905 {
2906         entityframeqw_database_t *d;
2907         d = (entityframeqw_database_t *)Mem_Alloc(pool, sizeof(*d));
2908         return d;
2909 }
2910
2911 void EntityFrameQW_FreeDatabase(entityframeqw_database_t *d)
2912 {
2913         Mem_Free(d);
2914 }
2915
2916 void EntityFrameQW_CL_ReadFrame(qboolean delta)
2917 {
2918         qboolean invalid = false;
2919         int number, oldsnapindex, newsnapindex, oldindex, newindex, oldnum, newnum;
2920         entity_t *ent;
2921         entityframeqw_database_t *d;
2922         entityframeqw_snapshot_t *oldsnap, *newsnap;
2923
2924         if (!cl.entitydatabaseqw)
2925                 cl.entitydatabaseqw = EntityFrameQW_AllocDatabase(cls.levelmempool);
2926         d = cl.entitydatabaseqw;
2927
2928         // there is no cls.netcon in demos, so this reading code can't access
2929         // cls.netcon-> at all...  so cls.qw_incoming_sequence and
2930         // cls.qw_outgoing_sequence are updated every time the corresponding
2931         // cls.netcon->qw. variables are updated
2932         // read the number of this frame to echo back in next input packet
2933         cl.qw_validsequence = cls.qw_incoming_sequence;
2934         newsnapindex = cl.qw_validsequence & QW_UPDATE_MASK;
2935         newsnap = d->snapshot + newsnapindex;
2936         memset(newsnap, 0, sizeof(*newsnap));
2937         oldsnapindex = -1;
2938         oldsnap = NULL;
2939         if (delta)
2940         {
2941                 number = MSG_ReadByte();
2942                 oldsnapindex = cl.qw_deltasequence[newsnapindex];
2943                 if ((number & QW_UPDATE_MASK) != (oldsnapindex & QW_UPDATE_MASK))
2944                         Con_DPrintf("WARNING: from mismatch\n");
2945                 if (oldsnapindex != -1)
2946                 {
2947                         if (cls.qw_outgoing_sequence - oldsnapindex >= QW_UPDATE_BACKUP-1)
2948                         {
2949                                 Con_DPrintf("delta update too old\n");
2950                                 newsnap->invalid = invalid = true; // too old
2951                                 delta = false;
2952                         }
2953                         oldsnap = d->snapshot + (oldsnapindex & QW_UPDATE_MASK);
2954                 }
2955                 else
2956                         delta = false;
2957         }
2958
2959         // if we can't decode this frame properly, report that to the server
2960         if (invalid)
2961                 cl.qw_validsequence = 0;
2962
2963         // read entity numbers until we find a 0x0000
2964         // (which would be an empty update on world entity, but is actually a terminator)
2965         newsnap->num_entities = 0;
2966         oldindex = 0;
2967         for (;;)
2968         {
2969                 int word = (unsigned short)MSG_ReadShort();
2970                 if (msg_badread)
2971                         return; // just return, the main parser will print an error
2972                 newnum = word == 0 ? 512 : (word & 511);
2973                 oldnum = delta ? (oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number) : 9999;
2974
2975                 // copy unmodified oldsnap entities
2976                 while (newnum > oldnum) // delta only
2977                 {
2978                         if (developer_networkentities.integer >= 2)
2979                                 Con_Printf("copy %i\n", oldnum);
2980                         // copy one of the old entities
2981                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2982                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2983                         newsnap->entities[newsnap->num_entities] = oldsnap->entities[oldindex++];
2984                         newsnap->num_entities++;
2985                         oldnum = oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number;
2986                 }
2987
2988                 if (word == 0)
2989                         break;
2990
2991                 if (developer_networkentities.integer >= 2)
2992                 {
2993                         if (word & QW_U_REMOVE)
2994                                 Con_Printf("remove %i\n", newnum);
2995                         else if (newnum == oldnum)
2996                                 Con_Printf("delta %i\n", newnum);
2997                         else
2998                                 Con_Printf("baseline %i\n", newnum);
2999                 }
3000
3001                 if (word & QW_U_REMOVE)
3002                 {
3003                         if (newnum != oldnum && !delta && !invalid)
3004                         {
3005                                 cl.qw_validsequence = 0;
3006                                 Con_Printf("WARNING: U_REMOVE %i on full update\n", newnum);
3007                         }
3008                 }
3009                 else
3010                 {
3011                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
3012                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
3013                         newsnap->entities[newsnap->num_entities] = (newnum == oldnum) ? oldsnap->entities[oldindex] : cl.entities[newnum].state_baseline;
3014                         EntityStateQW_ReadEntityUpdate(newsnap->entities + newsnap->num_entities, word);
3015                         newsnap->num_entities++;
3016                 }
3017
3018                 if (newnum == oldnum)
3019                         oldindex++;
3020         }
3021
3022         // expand cl.num_entities to include every entity we've seen this game
3023         newnum = newsnap->num_entities ? newsnap->entities[newsnap->num_entities - 1].number : 1;
3024         if (cl.num_entities <= newnum)
3025         {
3026                 cl.num_entities = newnum + 1;
3027                 if (cl.max_entities < newnum + 1)
3028                         CL_ExpandEntities(newnum);
3029         }
3030
3031         // now update the non-player entities from the snapshot states
3032         number = cl.maxclients + 1;
3033         for (newindex = 0;;newindex++)
3034         {
3035                 newnum = newindex >= newsnap->num_entities ? cl.num_entities : newsnap->entities[newindex].number;
3036                 // kill any missing entities
3037                 for (;number < newnum;number++)
3038                 {
3039                         if (cl.entities_active[number])
3040                         {
3041                                 cl.entities_active[number] = false;
3042                                 cl.entities[number].state_current.active = false;
3043                         }
3044                 }
3045                 if (number >= cl.num_entities)
3046                         break;
3047                 // update the entity
3048                 ent = &cl.entities[number];
3049                 ent->state_previous = ent->state_current;
3050                 ent->state_current = newsnap->entities[newindex];
3051                 ent->state_current.time = cl.mtime[0];
3052                 CL_MoveLerpEntityStates(ent);
3053                 // the entity lives again...
3054                 cl.entities_active[number] = true;
3055                 number++;
3056         }
3057 }