force 32bit origin for player entiites (TODO: possibly for bmodels too?) to get bette...
[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 qboolean 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 false;
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 false;
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         return sectionstarted;
602 }
603
604 void Protocol_UpdateClientStats(const int *stats)
605 {
606         int i;
607         // update the stats array and set deltabits for any changed stats
608         for (i = 0;i < MAX_CL_STATS;i++)
609         {
610                 if (host_client->stats[i] != stats[i])
611                 {
612                         host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
613                         host_client->stats[i] = stats[i];
614                 }
615         }
616 }
617
618 // only a few stats are within the 32 stat limit of Quake, and most of them
619 // are sent every frame in svc_clientdata messages, so we only send the
620 // remaining ones here
621 static const int sendquakestats[] =
622 {
623 // quake did not send these secrets/monsters stats in this way, but doing so
624 // allows a mod to increase STAT_TOTALMONSTERS during the game, and ensures
625 // that STAT_SECRETS and STAT_MONSTERS are always correct (even if a client
626 // didn't receive an svc_foundsecret or svc_killedmonster), which may be most
627 // valuable if randomly seeking around in a demo
628 STAT_TOTALSECRETS, // never changes during game
629 STAT_TOTALMONSTERS, // changes in some mods
630 STAT_SECRETS, // this makes svc_foundsecret unnecessary
631 STAT_MONSTERS, // this makes svc_killedmonster unnecessary
632 STAT_VIEWHEIGHT, // sent just for FTEQW clients
633 STAT_VIEWZOOM, // this rarely changes
634 -1,
635 };
636
637 void Protocol_WriteStatsReliable(void)
638 {
639         int i, j;
640         if (!host_client->netconnection)
641                 return;
642         // detect changes in stats and write reliable messages
643         // this only deals with 32 stats because the older protocols which use
644         // this function can only cope with 32 stats,
645         // they also do not support svc_updatestatubyte which was introduced in
646         // DP6 protocol (except for QW)
647         for (j = 0;sendquakestats[j] >= 0;j++)
648         {
649                 i = sendquakestats[j];
650                 // check if this bit is set
651                 if (host_client->statsdeltabits[i >> 3] & (1 << (i & 7)))
652                 {
653                         host_client->statsdeltabits[i >> 3] -= (1 << (i & 7));
654                         // send the stat as a byte if possible
655                         if (sv.protocol == PROTOCOL_QUAKEWORLD)
656                         {
657                                 if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
658                                 {
659                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestat);
660                                         MSG_WriteByte(&host_client->netconnection->message, i);
661                                         MSG_WriteByte(&host_client->netconnection->message, host_client->stats[i]);
662                                 }
663                                 else
664                                 {
665                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestatlong);
666                                         MSG_WriteByte(&host_client->netconnection->message, i);
667                                         MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
668                                 }
669                         }
670                         else
671                         {
672                                 // this could make use of svc_updatestatubyte in DP6 and later
673                                 // protocols but those protocols do not use this function
674                                 MSG_WriteByte(&host_client->netconnection->message, svc_updatestat);
675                                 MSG_WriteByte(&host_client->netconnection->message, i);
676                                 MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
677                         }
678                 }
679         }
680 }
681
682
683 void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int maxsize, int numstates, const entity_state_t *states)
684 {
685         const entity_state_t *s;
686         entity_state_t baseline;
687         int i, bits;
688         sizebuf_t buf;
689         unsigned char data[128];
690         prvm_eval_t *val;
691
692         // prepare the buffer
693         memset(&buf, 0, sizeof(buf));
694         buf.data = data;
695         buf.maxsize = sizeof(data);
696
697         for (i = 0, s = states;i < numstates;i++, s++)
698         {
699                 ENTITYSIZEPROFILING_START(msg, s->number);
700                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
701                 if(val && val->function)
702                         continue;
703
704                 // prepare the buffer
705                 SZ_Clear(&buf);
706
707 // send an update
708                 bits = 0;
709                 if (s->number >= 256)
710                         bits |= U_LONGENTITY;
711                 if (s->flags & RENDER_STEP)
712                         bits |= U_STEP;
713                 if (s->flags & RENDER_VIEWMODEL)
714                         bits |= U_VIEWMODEL;
715                 if (s->flags & RENDER_GLOWTRAIL)
716                         bits |= U_GLOWTRAIL;
717                 if (s->flags & RENDER_EXTERIORMODEL)
718                         bits |= U_EXTERIORMODEL;
719
720                 // LordHavoc: old stuff, but rewritten to have more exact tolerances
721                 baseline = prog->edicts[s->number].priv.server->baseline;
722                 if (baseline.origin[0] != s->origin[0])
723                         bits |= U_ORIGIN1;
724                 if (baseline.origin[1] != s->origin[1])
725                         bits |= U_ORIGIN2;
726                 if (baseline.origin[2] != s->origin[2])
727                         bits |= U_ORIGIN3;
728                 if (baseline.angles[0] != s->angles[0])
729                         bits |= U_ANGLE1;
730                 if (baseline.angles[1] != s->angles[1])
731                         bits |= U_ANGLE2;
732                 if (baseline.angles[2] != s->angles[2])
733                         bits |= U_ANGLE3;
734                 if (baseline.colormap != s->colormap)
735                         bits |= U_COLORMAP;
736                 if (baseline.skin != s->skin)
737                         bits |= U_SKIN;
738                 if (baseline.frame != s->frame)
739                 {
740                         bits |= U_FRAME;
741                         if (s->frame & 0xFF00)
742                                 bits |= U_FRAME2;
743                 }
744                 if (baseline.effects != s->effects)
745                 {
746                         bits |= U_EFFECTS;
747                         if (s->effects & 0xFF00)
748                                 bits |= U_EFFECTS2;
749                 }
750                 if (baseline.modelindex != s->modelindex)
751                 {
752                         bits |= U_MODEL;
753                         if ((s->modelindex & 0xFF00) && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3)
754                                 bits |= U_MODEL2;
755                 }
756                 if (baseline.alpha != s->alpha)
757                         bits |= U_ALPHA;
758                 if (baseline.scale != s->scale)
759                         bits |= U_SCALE;
760                 if (baseline.glowsize != s->glowsize)
761                         bits |= U_GLOWSIZE;
762                 if (baseline.glowcolor != s->glowcolor)
763                         bits |= U_GLOWCOLOR;
764                 if (!VectorCompare(baseline.colormod, s->colormod))
765                         bits |= U_COLORMOD;
766
767                 // if extensions are disabled, clear the relevant update flags
768                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
769                         bits &= 0x7FFF;
770                 if (sv.protocol == PROTOCOL_NEHAHRAMOVIE)
771                         if (s->alpha != 255 || s->effects & EF_FULLBRIGHT)
772                                 bits |= U_EXTEND1;
773
774                 // write the message
775                 if (bits >= 16777216)
776                         bits |= U_EXTEND2;
777                 if (bits >= 65536)
778                         bits |= U_EXTEND1;
779                 if (bits >= 256)
780                         bits |= U_MOREBITS;
781                 bits |= U_SIGNAL;
782
783                 MSG_WriteByte (&buf, bits);
784                 if (bits & U_MOREBITS)          MSG_WriteByte(&buf, bits>>8);
785                 if (sv.protocol != PROTOCOL_NEHAHRAMOVIE)
786                 {
787                         if (bits & U_EXTEND1)   MSG_WriteByte(&buf, bits>>16);
788                         if (bits & U_EXTEND2)   MSG_WriteByte(&buf, bits>>24);
789                 }
790                 if (bits & U_LONGENTITY)        MSG_WriteShort(&buf, s->number);
791                 else                                            MSG_WriteByte(&buf, s->number);
792
793                 if (bits & U_MODEL)
794                 {
795                         if (sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3)
796                                 MSG_WriteShort(&buf, s->modelindex);
797                         else
798                                 MSG_WriteByte(&buf, s->modelindex);
799                 }
800                 if (bits & U_FRAME)                     MSG_WriteByte(&buf, s->frame);
801                 if (bits & U_COLORMAP)          MSG_WriteByte(&buf, s->colormap);
802                 if (bits & U_SKIN)                      MSG_WriteByte(&buf, s->skin);
803                 if (bits & U_EFFECTS)           MSG_WriteByte(&buf, s->effects);
804                 if (bits & U_ORIGIN1)           MSG_WriteCoord(&buf, s->origin[0], sv.protocol);
805                 if (bits & U_ANGLE1)            MSG_WriteAngle(&buf, s->angles[0], sv.protocol);
806                 if (bits & U_ORIGIN2)           MSG_WriteCoord(&buf, s->origin[1], sv.protocol);
807                 if (bits & U_ANGLE2)            MSG_WriteAngle(&buf, s->angles[1], sv.protocol);
808                 if (bits & U_ORIGIN3)           MSG_WriteCoord(&buf, s->origin[2], sv.protocol);
809                 if (bits & U_ANGLE3)            MSG_WriteAngle(&buf, s->angles[2], sv.protocol);
810                 if (bits & U_ALPHA)                     MSG_WriteByte(&buf, s->alpha);
811                 if (bits & U_SCALE)                     MSG_WriteByte(&buf, s->scale);
812                 if (bits & U_EFFECTS2)          MSG_WriteByte(&buf, s->effects >> 8);
813                 if (bits & U_GLOWSIZE)          MSG_WriteByte(&buf, s->glowsize);
814                 if (bits & U_GLOWCOLOR)         MSG_WriteByte(&buf, s->glowcolor);
815                 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);}
816                 if (bits & U_FRAME2)            MSG_WriteByte(&buf, s->frame >> 8);
817                 if (bits & U_MODEL2)            MSG_WriteByte(&buf, s->modelindex >> 8);
818
819                 // the nasty protocol
820                 if ((bits & U_EXTEND1) && sv.protocol == PROTOCOL_NEHAHRAMOVIE)
821                 {
822                         if (s->effects & EF_FULLBRIGHT)
823                         {
824                                 MSG_WriteFloat(&buf, 2); // QSG protocol version
825                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
826                                 MSG_WriteFloat(&buf, 1); // fullbright
827                         }
828                         else
829                         {
830                                 MSG_WriteFloat(&buf, 1); // QSG protocol version
831                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
832                         }
833                 }
834
835                 // if the commit is full, we're done this frame
836                 if (msg->cursize + buf.cursize > maxsize)
837                 {
838                         // next frame we will continue where we left off
839                         break;
840                 }
841                 // write the message to the packet
842                 SZ_Write(msg, buf.data, buf.cursize);
843                 ENTITYSIZEPROFILING_END(msg, s->number);
844         }
845 }
846
847 int EntityState_DeltaBits(const entity_state_t *o, const entity_state_t *n)
848 {
849         unsigned int bits;
850         // if o is not active, delta from default
851         if (!o->active)
852                 o = &defaultstate;
853         bits = 0;
854         if (fabs(n->origin[0] - o->origin[0]) > (1.0f / 256.0f))
855                 bits |= E_ORIGIN1;
856         if (fabs(n->origin[1] - o->origin[1]) > (1.0f / 256.0f))
857                 bits |= E_ORIGIN2;
858         if (fabs(n->origin[2] - o->origin[2]) > (1.0f / 256.0f))
859                 bits |= E_ORIGIN3;
860         if ((unsigned char) (n->angles[0] * (256.0f / 360.0f)) != (unsigned char) (o->angles[0] * (256.0f / 360.0f)))
861                 bits |= E_ANGLE1;
862         if ((unsigned char) (n->angles[1] * (256.0f / 360.0f)) != (unsigned char) (o->angles[1] * (256.0f / 360.0f)))
863                 bits |= E_ANGLE2;
864         if ((unsigned char) (n->angles[2] * (256.0f / 360.0f)) != (unsigned char) (o->angles[2] * (256.0f / 360.0f)))
865                 bits |= E_ANGLE3;
866         if ((n->modelindex ^ o->modelindex) & 0x00FF)
867                 bits |= E_MODEL1;
868         if ((n->modelindex ^ o->modelindex) & 0xFF00)
869                 bits |= E_MODEL2;
870         if ((n->frame ^ o->frame) & 0x00FF)
871                 bits |= E_FRAME1;
872         if ((n->frame ^ o->frame) & 0xFF00)
873                 bits |= E_FRAME2;
874         if ((n->effects ^ o->effects) & 0x00FF)
875                 bits |= E_EFFECTS1;
876         if ((n->effects ^ o->effects) & 0xFF00)
877                 bits |= E_EFFECTS2;
878         if (n->colormap != o->colormap)
879                 bits |= E_COLORMAP;
880         if (n->skin != o->skin)
881                 bits |= E_SKIN;
882         if (n->alpha != o->alpha)
883                 bits |= E_ALPHA;
884         if (n->scale != o->scale)
885                 bits |= E_SCALE;
886         if (n->glowsize != o->glowsize)
887                 bits |= E_GLOWSIZE;
888         if (n->glowcolor != o->glowcolor)
889                 bits |= E_GLOWCOLOR;
890         if (n->flags != o->flags)
891                 bits |= E_FLAGS;
892         if (n->tagindex != o->tagindex || n->tagentity != o->tagentity)
893                 bits |= E_TAGATTACHMENT;
894         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])
895                 bits |= E_LIGHT;
896         if (n->lightstyle != o->lightstyle)
897                 bits |= E_LIGHTSTYLE;
898         if (n->lightpflags != o->lightpflags)
899                 bits |= E_LIGHTPFLAGS;
900
901         if (bits)
902         {
903                 if (bits &  0xFF000000)
904                         bits |= 0x00800000;
905                 if (bits &  0x00FF0000)
906                         bits |= 0x00008000;
907                 if (bits &  0x0000FF00)
908                         bits |= 0x00000080;
909         }
910         return bits;
911 }
912
913 void EntityState_WriteExtendBits(sizebuf_t *msg, unsigned int bits)
914 {
915         MSG_WriteByte(msg, bits & 0xFF);
916         if (bits & 0x00000080)
917         {
918                 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
919                 if (bits & 0x00008000)
920                 {
921                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
922                         if (bits & 0x00800000)
923                                 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
924                 }
925         }
926 }
927
928 void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned int bits)
929 {
930         if (sv.protocol == PROTOCOL_DARKPLACES2)
931         {
932                 if (bits & E_ORIGIN1)
933                         MSG_WriteCoord16i(msg, ent->origin[0]);
934                 if (bits & E_ORIGIN2)
935                         MSG_WriteCoord16i(msg, ent->origin[1]);
936                 if (bits & E_ORIGIN3)
937                         MSG_WriteCoord16i(msg, ent->origin[2]);
938         }
939         else
940         {
941                 // LordHavoc: have to write flags first, as they can modify protocol
942                 if (bits & E_FLAGS)
943                         MSG_WriteByte(msg, ent->flags);
944                 if (ent->flags & RENDER_LOWPRECISION)
945                 {
946                         if (bits & E_ORIGIN1)
947                                 MSG_WriteCoord16i(msg, ent->origin[0]);
948                         if (bits & E_ORIGIN2)
949                                 MSG_WriteCoord16i(msg, ent->origin[1]);
950                         if (bits & E_ORIGIN3)
951                                 MSG_WriteCoord16i(msg, ent->origin[2]);
952                 }
953                 else
954                 {
955                         if (bits & E_ORIGIN1)
956                                 MSG_WriteCoord32f(msg, ent->origin[0]);
957                         if (bits & E_ORIGIN2)
958                                 MSG_WriteCoord32f(msg, ent->origin[1]);
959                         if (bits & E_ORIGIN3)
960                                 MSG_WriteCoord32f(msg, ent->origin[2]);
961                 }
962         }
963         if ((sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4) && (ent->flags & RENDER_LOWPRECISION))
964         {
965                 if (bits & E_ANGLE1)
966                         MSG_WriteAngle8i(msg, ent->angles[0]);
967                 if (bits & E_ANGLE2)
968                         MSG_WriteAngle8i(msg, ent->angles[1]);
969                 if (bits & E_ANGLE3)
970                         MSG_WriteAngle8i(msg, ent->angles[2]);
971         }
972         else
973         {
974                 if (bits & E_ANGLE1)
975                         MSG_WriteAngle16i(msg, ent->angles[0]);
976                 if (bits & E_ANGLE2)
977                         MSG_WriteAngle16i(msg, ent->angles[1]);
978                 if (bits & E_ANGLE3)
979                         MSG_WriteAngle16i(msg, ent->angles[2]);
980         }
981         if (bits & E_MODEL1)
982                 MSG_WriteByte(msg, ent->modelindex & 0xFF);
983         if (bits & E_MODEL2)
984                 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
985         if (bits & E_FRAME1)
986                 MSG_WriteByte(msg, ent->frame & 0xFF);
987         if (bits & E_FRAME2)
988                 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
989         if (bits & E_EFFECTS1)
990                 MSG_WriteByte(msg, ent->effects & 0xFF);
991         if (bits & E_EFFECTS2)
992                 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
993         if (bits & E_COLORMAP)
994                 MSG_WriteByte(msg, ent->colormap);
995         if (bits & E_SKIN)
996                 MSG_WriteByte(msg, ent->skin);
997         if (bits & E_ALPHA)
998                 MSG_WriteByte(msg, ent->alpha);
999         if (bits & E_SCALE)
1000                 MSG_WriteByte(msg, ent->scale);
1001         if (bits & E_GLOWSIZE)
1002                 MSG_WriteByte(msg, ent->glowsize);
1003         if (bits & E_GLOWCOLOR)
1004                 MSG_WriteByte(msg, ent->glowcolor);
1005         if (sv.protocol == PROTOCOL_DARKPLACES2)
1006                 if (bits & E_FLAGS)
1007                         MSG_WriteByte(msg, ent->flags);
1008         if (bits & E_TAGATTACHMENT)
1009         {
1010                 MSG_WriteShort(msg, ent->tagentity);
1011                 MSG_WriteByte(msg, ent->tagindex);
1012         }
1013         if (bits & E_LIGHT)
1014         {
1015                 MSG_WriteShort(msg, ent->light[0]);
1016                 MSG_WriteShort(msg, ent->light[1]);
1017                 MSG_WriteShort(msg, ent->light[2]);
1018                 MSG_WriteShort(msg, ent->light[3]);
1019         }
1020         if (bits & E_LIGHTSTYLE)
1021                 MSG_WriteByte(msg, ent->lightstyle);
1022         if (bits & E_LIGHTPFLAGS)
1023                 MSG_WriteByte(msg, ent->lightpflags);
1024 }
1025
1026 void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
1027 {
1028         unsigned int bits;
1029         ENTITYSIZEPROFILING_START(msg, ent->number);
1030         if (ent->active)
1031         {
1032                 // entity is active, check for changes from the delta
1033                 if ((bits = EntityState_DeltaBits(delta, ent)))
1034                 {
1035                         // write the update number, bits, and fields
1036                         MSG_WriteShort(msg, ent->number);
1037                         EntityState_WriteExtendBits(msg, bits);
1038                         EntityState_WriteFields(ent, msg, bits);
1039                 }
1040         }
1041         else
1042         {
1043                 // entity is inactive, check if the delta was active
1044                 if (delta->active)
1045                 {
1046                         // write the remove number
1047                         MSG_WriteShort(msg, ent->number | 0x8000);
1048                 }
1049         }
1050         ENTITYSIZEPROFILING_END(msg, ent->number);
1051 }
1052
1053 int EntityState_ReadExtendBits(void)
1054 {
1055         unsigned int bits;
1056         bits = MSG_ReadByte();
1057         if (bits & 0x00000080)
1058         {
1059                 bits |= MSG_ReadByte() << 8;
1060                 if (bits & 0x00008000)
1061                 {
1062                         bits |= MSG_ReadByte() << 16;
1063                         if (bits & 0x00800000)
1064                                 bits |= MSG_ReadByte() << 24;
1065                 }
1066         }
1067         return bits;
1068 }
1069
1070 void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
1071 {
1072         if (cls.protocol == PROTOCOL_DARKPLACES2)
1073         {
1074                 if (bits & E_ORIGIN1)
1075                         e->origin[0] = MSG_ReadCoord16i();
1076                 if (bits & E_ORIGIN2)
1077                         e->origin[1] = MSG_ReadCoord16i();
1078                 if (bits & E_ORIGIN3)
1079                         e->origin[2] = MSG_ReadCoord16i();
1080         }
1081         else
1082         {
1083                 if (bits & E_FLAGS)
1084                         e->flags = MSG_ReadByte();
1085                 if (e->flags & RENDER_LOWPRECISION)
1086                 {
1087                         if (bits & E_ORIGIN1)
1088                                 e->origin[0] = MSG_ReadCoord16i();
1089                         if (bits & E_ORIGIN2)
1090                                 e->origin[1] = MSG_ReadCoord16i();
1091                         if (bits & E_ORIGIN3)
1092                                 e->origin[2] = MSG_ReadCoord16i();
1093                 }
1094                 else
1095                 {
1096                         if (bits & E_ORIGIN1)
1097                                 e->origin[0] = MSG_ReadCoord32f();
1098                         if (bits & E_ORIGIN2)
1099                                 e->origin[1] = MSG_ReadCoord32f();
1100                         if (bits & E_ORIGIN3)
1101                                 e->origin[2] = MSG_ReadCoord32f();
1102                 }
1103         }
1104         if ((cls.protocol == PROTOCOL_DARKPLACES5 || cls.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
1105         {
1106                 if (bits & E_ANGLE1)
1107                         e->angles[0] = MSG_ReadAngle16i();
1108                 if (bits & E_ANGLE2)
1109                         e->angles[1] = MSG_ReadAngle16i();
1110                 if (bits & E_ANGLE3)
1111                         e->angles[2] = MSG_ReadAngle16i();
1112         }
1113         else
1114         {
1115                 if (bits & E_ANGLE1)
1116                         e->angles[0] = MSG_ReadAngle8i();
1117                 if (bits & E_ANGLE2)
1118                         e->angles[1] = MSG_ReadAngle8i();
1119                 if (bits & E_ANGLE3)
1120                         e->angles[2] = MSG_ReadAngle8i();
1121         }
1122         if (bits & E_MODEL1)
1123                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
1124         if (bits & E_MODEL2)
1125                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
1126         if (bits & E_FRAME1)
1127                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
1128         if (bits & E_FRAME2)
1129                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
1130         if (bits & E_EFFECTS1)
1131                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
1132         if (bits & E_EFFECTS2)
1133                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
1134         if (bits & E_COLORMAP)
1135                 e->colormap = MSG_ReadByte();
1136         if (bits & E_SKIN)
1137                 e->skin = MSG_ReadByte();
1138         if (bits & E_ALPHA)
1139                 e->alpha = MSG_ReadByte();
1140         if (bits & E_SCALE)
1141                 e->scale = MSG_ReadByte();
1142         if (bits & E_GLOWSIZE)
1143                 e->glowsize = MSG_ReadByte();
1144         if (bits & E_GLOWCOLOR)
1145                 e->glowcolor = MSG_ReadByte();
1146         if (cls.protocol == PROTOCOL_DARKPLACES2)
1147                 if (bits & E_FLAGS)
1148                         e->flags = MSG_ReadByte();
1149         if (bits & E_TAGATTACHMENT)
1150         {
1151                 e->tagentity = (unsigned short) MSG_ReadShort();
1152                 e->tagindex = MSG_ReadByte();
1153         }
1154         if (bits & E_LIGHT)
1155         {
1156                 e->light[0] = (unsigned short) MSG_ReadShort();
1157                 e->light[1] = (unsigned short) MSG_ReadShort();
1158                 e->light[2] = (unsigned short) MSG_ReadShort();
1159                 e->light[3] = (unsigned short) MSG_ReadShort();
1160         }
1161         if (bits & E_LIGHTSTYLE)
1162                 e->lightstyle = MSG_ReadByte();
1163         if (bits & E_LIGHTPFLAGS)
1164                 e->lightpflags = MSG_ReadByte();
1165
1166         if (developer_networkentities.integer >= 2)
1167         {
1168                 Con_Printf("ReadFields e%i", e->number);
1169
1170                 if (bits & E_ORIGIN1)
1171                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
1172                 if (bits & E_ORIGIN2)
1173                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
1174                 if (bits & E_ORIGIN3)
1175                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
1176                 if (bits & E_ANGLE1)
1177                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
1178                 if (bits & E_ANGLE2)
1179                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
1180                 if (bits & E_ANGLE3)
1181                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
1182                 if (bits & (E_MODEL1 | E_MODEL2))
1183                         Con_Printf(" E_MODEL %i", e->modelindex);
1184
1185                 if (bits & (E_FRAME1 | E_FRAME2))
1186                         Con_Printf(" E_FRAME %i", e->frame);
1187                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
1188                         Con_Printf(" E_EFFECTS %i", e->effects);
1189                 if (bits & E_ALPHA)
1190                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
1191                 if (bits & E_SCALE)
1192                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
1193                 if (bits & E_COLORMAP)
1194                         Con_Printf(" E_COLORMAP %i", e->colormap);
1195                 if (bits & E_SKIN)
1196                         Con_Printf(" E_SKIN %i", e->skin);
1197
1198                 if (bits & E_GLOWSIZE)
1199                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
1200                 if (bits & E_GLOWCOLOR)
1201                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
1202
1203                 if (bits & E_LIGHT)
1204                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
1205                 if (bits & E_LIGHTPFLAGS)
1206                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
1207
1208                 if (bits & E_TAGATTACHMENT)
1209                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
1210                 if (bits & E_LIGHTSTYLE)
1211                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
1212                 Con_Print("\n");
1213         }
1214 }
1215
1216 // (client and server) allocates a new empty database
1217 entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
1218 {
1219         return (entityframe_database_t *)Mem_Alloc(mempool, sizeof(entityframe_database_t));
1220 }
1221
1222 // (client and server) frees the database
1223 void EntityFrame_FreeDatabase(entityframe_database_t *d)
1224 {
1225         Mem_Free(d);
1226 }
1227
1228 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
1229 void EntityFrame_ClearDatabase(entityframe_database_t *d)
1230 {
1231         memset(d, 0, sizeof(*d));
1232 }
1233
1234 // (server and client) removes frames older than 'frame' from database
1235 void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
1236 {
1237         int i;
1238         d->ackframenum = frame;
1239         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
1240         // ignore outdated frame acks (out of order packets)
1241         if (i == 0)
1242                 return;
1243         d->numframes -= i;
1244         // if some queue is left, slide it down to beginning of array
1245         if (d->numframes)
1246                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
1247 }
1248
1249 // (server) clears frame, to prepare for adding entities
1250 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
1251 {
1252         f->time = 0;
1253         f->framenum = framenum;
1254         f->numentities = 0;
1255         if (eye == NULL)
1256                 VectorClear(f->eye);
1257         else
1258                 VectorCopy(eye, f->eye);
1259 }
1260
1261 // (server and client) reads a frame from the database
1262 void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
1263 {
1264         int i, n;
1265         EntityFrame_Clear(f, NULL, -1);
1266         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
1267         if (i < d->numframes && framenum == d->frames[i].framenum)
1268         {
1269                 f->framenum = framenum;
1270                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
1271                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
1272                 if (n > f->numentities)
1273                         n = f->numentities;
1274                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
1275                 if (f->numentities > n)
1276                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
1277                 VectorCopy(d->eye, f->eye);
1278         }
1279 }
1280
1281 // (server and client) adds a entity_frame to the database, for future reference
1282 void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
1283 {
1284         int n, e;
1285         entity_frameinfo_t *info;
1286
1287         VectorCopy(eye, d->eye);
1288
1289         // figure out how many entity slots are used already
1290         if (d->numframes)
1291         {
1292                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
1293                 if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
1294                 {
1295                         // ran out of room, dump database
1296                         EntityFrame_ClearDatabase(d);
1297                 }
1298         }
1299
1300         info = &d->frames[d->numframes];
1301         info->framenum = framenum;
1302         e = -1000;
1303         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
1304         for (n = 0;n <= d->numframes;n++)
1305         {
1306                 if (e >= d->frames[n].framenum)
1307                 {
1308                         if (e == framenum)
1309                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
1310                         else
1311                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
1312                         return;
1313                 }
1314                 e = d->frames[n].framenum;
1315         }
1316         // if database still has frames after that...
1317         if (d->numframes)
1318                 info->firstentity = d->frames[d->numframes - 1].endentity;
1319         else
1320                 info->firstentity = 0;
1321         info->endentity = info->firstentity + numentities;
1322         d->numframes++;
1323
1324         n = info->firstentity % MAX_ENTITY_DATABASE;
1325         e = MAX_ENTITY_DATABASE - n;
1326         if (e > numentities)
1327                 e = numentities;
1328         memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
1329         if (numentities > e)
1330                 memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
1331 }
1332
1333 // (server) writes a frame to network stream
1334 void EntityFrame_WriteFrame(sizebuf_t *msg, int maxsize, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
1335 {
1336         int i, onum, number;
1337         entity_frame_t *o = &d->deltaframe;
1338         const entity_state_t *ent, *delta;
1339         vec3_t eye;
1340         prvm_eval_t *val;
1341
1342         d->latestframenum++;
1343
1344         VectorClear(eye);
1345         for (i = 0;i < numstates;i++)
1346         {
1347                 if (states[i].number == viewentnum)
1348                 {
1349                         VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
1350                         break;
1351                 }
1352         }
1353
1354         EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
1355
1356         EntityFrame_FetchFrame(d, d->ackframenum, o);
1357
1358         MSG_WriteByte (msg, svc_entities);
1359         MSG_WriteLong (msg, o->framenum);
1360         MSG_WriteLong (msg, d->latestframenum);
1361         MSG_WriteFloat (msg, eye[0]);
1362         MSG_WriteFloat (msg, eye[1]);
1363         MSG_WriteFloat (msg, eye[2]);
1364
1365         onum = 0;
1366         for (i = 0;i < numstates;i++)
1367         {
1368                 ent = states + i;
1369                 number = ent->number;
1370
1371                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[number]), prog->fieldoffsets.SendEntity);
1372                 if(val && val->function)
1373                                 continue;
1374                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
1375                 {
1376                         // write remove message
1377                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1378                 }
1379                 if (onum < o->numentities && (o->entitydata[onum].number == number))
1380                 {
1381                         // delta from previous frame
1382                         delta = o->entitydata + onum;
1383                         // advance to next entity in delta frame
1384                         onum++;
1385                 }
1386                 else
1387                 {
1388                         // delta from defaults
1389                         delta = &defaultstate;
1390                 }
1391                 EntityState_WriteUpdate(ent, msg, delta);
1392         }
1393         for (;onum < o->numentities;onum++)
1394         {
1395                 // write remove message
1396                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1397         }
1398         MSG_WriteShort(msg, 0xFFFF);
1399 }
1400
1401 // (client) reads a frame from network stream
1402 void EntityFrame_CL_ReadFrame(void)
1403 {
1404         int i, number, removed;
1405         entity_frame_t *f, *delta;
1406         entity_state_t *e, *old, *oldend;
1407         entity_t *ent;
1408         entityframe_database_t *d;
1409         if (!cl.entitydatabase)
1410                 cl.entitydatabase = EntityFrame_AllocDatabase(cls.levelmempool);
1411         d = cl.entitydatabase;
1412         f = &d->framedata;
1413         delta = &d->deltaframe;
1414
1415         EntityFrame_Clear(f, NULL, -1);
1416
1417         // read the frame header info
1418         f->time = cl.mtime[0];
1419         number = MSG_ReadLong();
1420         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1421                 cl.latestframenums[i] = cl.latestframenums[i+1];
1422         cl.latestframenums[LATESTFRAMENUMS-1] = f->framenum = MSG_ReadLong();
1423         f->eye[0] = MSG_ReadFloat();
1424         f->eye[1] = MSG_ReadFloat();
1425         f->eye[2] = MSG_ReadFloat();
1426         EntityFrame_AckFrame(d, number);
1427         EntityFrame_FetchFrame(d, number, delta);
1428         old = delta->entitydata;
1429         oldend = old + delta->numentities;
1430         // read entities until we hit the magic 0xFFFF end tag
1431         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
1432         {
1433                 if (msg_badread)
1434                         Host_Error("EntityFrame_Read: read error");
1435                 removed = number & 0x8000;
1436                 number &= 0x7FFF;
1437                 if (number >= MAX_EDICTS)
1438                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)", number, MAX_EDICTS);
1439
1440                 // seek to entity, while copying any skipped entities (assume unchanged)
1441                 while (old < oldend && old->number < number)
1442                 {
1443                         if (f->numentities >= MAX_ENTITY_DATABASE)
1444                                 Host_Error("EntityFrame_Read: entity list too big");
1445                         f->entitydata[f->numentities] = *old++;
1446                         f->entitydata[f->numentities++].time = cl.mtime[0];
1447                 }
1448                 if (removed)
1449                 {
1450                         if (old < oldend && old->number == number)
1451                                 old++;
1452                         else
1453                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
1454                 }
1455                 else
1456                 {
1457                         if (f->numentities >= MAX_ENTITY_DATABASE)
1458                                 Host_Error("EntityFrame_Read: entity list too big");
1459
1460                         // reserve this slot
1461                         e = f->entitydata + f->numentities++;
1462
1463                         if (old < oldend && old->number == number)
1464                         {
1465                                 // delta from old entity
1466                                 *e = *old++;
1467                         }
1468                         else
1469                         {
1470                                 // delta from defaults
1471                                 *e = defaultstate;
1472                         }
1473
1474                         if (cl.num_entities <= number)
1475                         {
1476                                 cl.num_entities = number + 1;
1477                                 if (number >= cl.max_entities)
1478                                         CL_ExpandEntities(number);
1479                         }
1480                         cl.entities_active[number] = true;
1481                         e->active = true;
1482                         e->time = cl.mtime[0];
1483                         e->number = number;
1484                         EntityState_ReadFields(e, EntityState_ReadExtendBits());
1485                 }
1486         }
1487         while (old < oldend)
1488         {
1489                 if (f->numentities >= MAX_ENTITY_DATABASE)
1490                         Host_Error("EntityFrame_Read: entity list too big");
1491                 f->entitydata[f->numentities] = *old++;
1492                 f->entitydata[f->numentities++].time = cl.mtime[0];
1493         }
1494         EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
1495
1496         memset(cl.entities_active, 0, cl.num_entities * sizeof(unsigned char));
1497         number = 1;
1498         for (i = 0;i < f->numentities;i++)
1499         {
1500                 for (;number < f->entitydata[i].number && number < cl.num_entities;number++)
1501                 {
1502                         if (cl.entities_active[number])
1503                         {
1504                                 cl.entities_active[number] = false;
1505                                 cl.entities[number].state_current.active = false;
1506                         }
1507                 }
1508                 if (number >= cl.num_entities)
1509                         break;
1510                 // update the entity
1511                 ent = &cl.entities[number];
1512                 ent->state_previous = ent->state_current;
1513                 ent->state_current = f->entitydata[i];
1514                 CL_MoveLerpEntityStates(ent);
1515                 // the entity lives again...
1516                 cl.entities_active[number] = true;
1517                 number++;
1518         }
1519         for (;number < cl.num_entities;number++)
1520         {
1521                 if (cl.entities_active[number])
1522                 {
1523                         cl.entities_active[number] = false;
1524                         cl.entities[number].state_current.active = false;
1525                 }
1526         }
1527 }
1528
1529
1530 // (client) returns the frame number of the most recent frame recieved
1531 int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
1532 {
1533         if (d->numframes)
1534                 return d->frames[d->numframes - 1].framenum;
1535         else
1536                 return -1;
1537 }
1538
1539
1540
1541
1542
1543
1544 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
1545 {
1546         if (d->maxreferenceentities <= number)
1547         {
1548                 int oldmax = d->maxreferenceentities;
1549                 entity_state_t *oldentity = d->referenceentity;
1550                 d->maxreferenceentities = (number + 15) & ~7;
1551                 d->referenceentity = (entity_state_t *)Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
1552                 if (oldentity)
1553                 {
1554                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
1555                         Mem_Free(oldentity);
1556                 }
1557                 // clear the newly created entities
1558                 for (;oldmax < d->maxreferenceentities;oldmax++)
1559                 {
1560                         d->referenceentity[oldmax] = defaultstate;
1561                         d->referenceentity[oldmax].number = oldmax;
1562                 }
1563         }
1564         return d->referenceentity + number;
1565 }
1566
1567 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
1568 {
1569         // resize commit's entity list if full
1570         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
1571         {
1572                 entity_state_t *oldentity = d->currentcommit->entity;
1573                 d->currentcommit->maxentities += 8;
1574                 d->currentcommit->entity = (entity_state_t *)Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
1575                 if (oldentity)
1576                 {
1577                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
1578                         Mem_Free(oldentity);
1579                 }
1580         }
1581         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
1582 }
1583
1584 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
1585 {
1586         entityframe4_database_t *d;
1587         d = (entityframe4_database_t *)Mem_Alloc(pool, sizeof(*d));
1588         d->mempool = pool;
1589         EntityFrame4_ResetDatabase(d);
1590         return d;
1591 }
1592
1593 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
1594 {
1595         int i;
1596         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1597                 if (d->commit[i].entity)
1598                         Mem_Free(d->commit[i].entity);
1599         if (d->referenceentity)
1600                 Mem_Free(d->referenceentity);
1601         Mem_Free(d);
1602 }
1603
1604 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
1605 {
1606         int i;
1607         d->referenceframenum = -1;
1608         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1609                 d->commit[i].numentities = 0;
1610         for (i = 0;i < d->maxreferenceentities;i++)
1611                 d->referenceentity[i] = defaultstate;
1612 }
1613
1614 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
1615 {
1616         int i, j, found;
1617         entity_database4_commit_t *commit;
1618         if (framenum == -1)
1619         {
1620                 // reset reference, but leave commits alone
1621                 d->referenceframenum = -1;
1622                 for (i = 0;i < d->maxreferenceentities;i++)
1623                         d->referenceentity[i] = defaultstate;
1624                 // if this is the server, remove commits
1625                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1626                                 commit->numentities = 0;
1627                 found = true;
1628         }
1629         else if (d->referenceframenum == framenum)
1630                 found = true;
1631         else
1632         {
1633                 found = false;
1634                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1635                 {
1636                         if (commit->numentities && commit->framenum <= framenum)
1637                         {
1638                                 if (commit->framenum == framenum)
1639                                 {
1640                                         found = true;
1641                                         d->referenceframenum = framenum;
1642                                         if (developer_networkentities.integer >= 3)
1643                                         {
1644                                                 for (j = 0;j < commit->numentities;j++)
1645                                                 {
1646                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
1647                                                         if (commit->entity[j].active != s->active)
1648                                                         {
1649                                                                 if (commit->entity[j].active)
1650                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1651                                                                 else
1652                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1653                                                         }
1654                                                         *s = commit->entity[j];
1655                                                 }
1656                                         }
1657                                         else
1658                                                 for (j = 0;j < commit->numentities;j++)
1659                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
1660                                 }
1661                                 commit->numentities = 0;
1662                         }
1663                 }
1664         }
1665         if (developer_networkentities.integer >= 1)
1666         {
1667                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
1668                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1669                         if (d->commit[i].numentities)
1670                                 Con_Printf(" %i", d->commit[i].framenum);
1671                 Con_Print("\n");
1672         }
1673         return found;
1674 }
1675
1676 void EntityFrame4_CL_ReadFrame(void)
1677 {
1678         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
1679         entity_state_t *s;
1680         entityframe4_database_t *d;
1681         if (!cl.entitydatabase4)
1682                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cls.levelmempool);
1683         d = cl.entitydatabase4;
1684         // read the number of the frame this refers to
1685         referenceframenum = MSG_ReadLong();
1686         // read the number of this frame
1687         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1688                 cl.latestframenums[i] = cl.latestframenums[i+1];
1689         cl.latestframenums[LATESTFRAMENUMS-1] = framenum = MSG_ReadLong();
1690         // read the start number
1691         enumber = (unsigned short) MSG_ReadShort();
1692         if (developer_networkentities.integer >= 10)
1693         {
1694                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
1695                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1696                         if (d->commit[i].numentities)
1697                                 Con_Printf(" %i", d->commit[i].framenum);
1698                 Con_Print("\n");
1699         }
1700         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
1701         {
1702                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
1703                 skip = true;
1704         }
1705         d->currentcommit = NULL;
1706         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1707         {
1708                 if (!d->commit[i].numentities)
1709                 {
1710                         d->currentcommit = d->commit + i;
1711                         d->currentcommit->framenum = framenum;
1712                         d->currentcommit->numentities = 0;
1713                 }
1714         }
1715         if (d->currentcommit == NULL)
1716         {
1717                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
1718                 skip = true;
1719         }
1720         done = false;
1721         while (!done && !msg_badread)
1722         {
1723                 // read the number of the modified entity
1724                 // (gaps will be copied unmodified)
1725                 n = (unsigned short)MSG_ReadShort();
1726                 if (n == 0x8000)
1727                 {
1728                         // no more entities in this update, but we still need to copy the
1729                         // rest of the reference entities (final gap)
1730                         done = true;
1731                         // read end of range number, then process normally
1732                         n = (unsigned short)MSG_ReadShort();
1733                 }
1734                 // high bit means it's a remove message
1735                 cnumber = n & 0x7FFF;
1736                 // if this is a live entity we may need to expand the array
1737                 if (cl.num_entities <= cnumber && !(n & 0x8000))
1738                 {
1739                         cl.num_entities = cnumber + 1;
1740                         if (cnumber >= cl.max_entities)
1741                                 CL_ExpandEntities(cnumber);
1742                 }
1743                 // add one (the changed one) if not done
1744                 stopnumber = cnumber + !done;
1745                 // process entities in range from the last one to the changed one
1746                 for (;enumber < stopnumber;enumber++)
1747                 {
1748                         if (skip || enumber >= cl.num_entities)
1749                         {
1750                                 if (enumber == cnumber && (n & 0x8000) == 0)
1751                                 {
1752                                         entity_state_t tempstate;
1753                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
1754                                 }
1755                                 continue;
1756                         }
1757                         // slide the current into the previous slot
1758                         cl.entities[enumber].state_previous = cl.entities[enumber].state_current;
1759                         // copy a new current from reference database
1760                         cl.entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
1761                         s = &cl.entities[enumber].state_current;
1762                         // if this is the one to modify, read more data...
1763                         if (enumber == cnumber)
1764                         {
1765                                 if (n & 0x8000)
1766                                 {
1767                                         // simply removed
1768                                         if (developer_networkentities.integer >= 2)
1769                                                 Con_Printf("entity %i: remove\n", enumber);
1770                                         *s = defaultstate;
1771                                 }
1772                                 else
1773                                 {
1774                                         // read the changes
1775                                         if (developer_networkentities.integer >= 2)
1776                                                 Con_Printf("entity %i: update\n", enumber);
1777                                         s->active = true;
1778                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
1779                                 }
1780                         }
1781                         else if (developer_networkentities.integer >= 4)
1782                                 Con_Printf("entity %i: copy\n", enumber);
1783                         // set the cl.entities_active flag
1784                         cl.entities_active[enumber] = s->active;
1785                         // set the update time
1786                         s->time = cl.mtime[0];
1787                         // fix the number (it gets wiped occasionally by copying from defaultstate)
1788                         s->number = enumber;
1789                         // check if we need to update the lerp stuff
1790                         if (s->active)
1791                                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
1792                         // add this to the commit entry whether it is modified or not
1793                         if (d->currentcommit)
1794                                 EntityFrame4_AddCommitEntity(d, &cl.entities[enumber].state_current);
1795                         // print extra messages if desired
1796                         if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
1797                         {
1798                                 if (cl.entities[enumber].state_current.active)
1799                                         Con_Printf("entity #%i has become active\n", enumber);
1800                                 else if (cl.entities[enumber].state_previous.active)
1801                                         Con_Printf("entity #%i has become inactive\n", enumber);
1802                         }
1803                 }
1804         }
1805         d->currentcommit = NULL;
1806         if (skip)
1807                 EntityFrame4_ResetDatabase(d);
1808 }
1809
1810 void EntityFrame4_WriteFrame(sizebuf_t *msg, int maxsize, entityframe4_database_t *d, int numstates, const entity_state_t *states)
1811 {
1812         const entity_state_t *e, *s;
1813         entity_state_t inactiveentitystate;
1814         int i, n, startnumber;
1815         sizebuf_t buf;
1816         unsigned char data[128];
1817         prvm_eval_t *val;
1818
1819         // if there isn't enough space to accomplish anything, skip it
1820         if (msg->cursize + 24 > maxsize)
1821                 return;
1822
1823         // prepare the buffer
1824         memset(&buf, 0, sizeof(buf));
1825         buf.data = data;
1826         buf.maxsize = sizeof(data);
1827
1828         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1829                 if (!d->commit[i].numentities)
1830                         break;
1831         // if commit buffer full, just don't bother writing an update this frame
1832         if (i == MAX_ENTITY_HISTORY)
1833                 return;
1834         d->currentcommit = d->commit + i;
1835
1836         // this state's number gets played around with later
1837         inactiveentitystate = defaultstate;
1838
1839         d->currentcommit->numentities = 0;
1840         d->currentcommit->framenum = ++d->latestframenumber;
1841         MSG_WriteByte(msg, svc_entities);
1842         MSG_WriteLong(msg, d->referenceframenum);
1843         MSG_WriteLong(msg, d->currentcommit->framenum);
1844         if (developer_networkentities.integer >= 10)
1845         {
1846                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
1847                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1848                         if (d->commit[i].numentities)
1849                                 Con_Printf(" %i", d->commit[i].framenum);
1850                 Con_Print(")\n");
1851         }
1852         if (d->currententitynumber >= prog->max_edicts)
1853                 startnumber = 1;
1854         else
1855                 startnumber = bound(1, d->currententitynumber, prog->max_edicts - 1);
1856         MSG_WriteShort(msg, startnumber);
1857         // reset currententitynumber so if the loop does not break it we will
1858         // start at beginning next frame (if it does break, it will set it)
1859         d->currententitynumber = 1;
1860         for (i = 0, n = startnumber;n < prog->max_edicts;n++)
1861         {
1862                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[n]), prog->fieldoffsets.SendEntity);
1863                 if(val && val->function)
1864                         continue;
1865                 // find the old state to delta from
1866                 e = EntityFrame4_GetReferenceEntity(d, n);
1867                 // prepare the buffer
1868                 SZ_Clear(&buf);
1869                 // entity exists, build an update (if empty there is no change)
1870                 // find the state in the list
1871                 for (;i < numstates && states[i].number < n;i++);
1872                 // make the message
1873                 s = states + i;
1874                 if (s->number == n)
1875                 {
1876                         // build the update
1877                         EntityState_WriteUpdate(s, &buf, e);
1878                 }
1879                 else
1880                 {
1881                         inactiveentitystate.number = n;
1882                         s = &inactiveentitystate;
1883                         if (e->active)
1884                         {
1885                                 // entity used to exist but doesn't anymore, send remove
1886                                 MSG_WriteShort(&buf, n | 0x8000);
1887                         }
1888                 }
1889                 // if the commit is full, we're done this frame
1890                 if (msg->cursize + buf.cursize > maxsize - 4)
1891                 {
1892                         // next frame we will continue where we left off
1893                         break;
1894                 }
1895                 // add the entity to the commit
1896                 EntityFrame4_AddCommitEntity(d, s);
1897                 // if the message is empty, skip out now
1898                 if (buf.cursize)
1899                 {
1900                         // write the message to the packet
1901                         SZ_Write(msg, buf.data, buf.cursize);
1902                 }
1903         }
1904         d->currententitynumber = n;
1905
1906         // remove world message (invalid, and thus a good terminator)
1907         MSG_WriteShort(msg, 0x8000);
1908         // write the number of the end entity
1909         MSG_WriteShort(msg, d->currententitynumber);
1910         // just to be sure
1911         d->currentcommit = NULL;
1912 }
1913
1914
1915
1916
1917 entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
1918 {
1919         int i;
1920         entityframe5_database_t *d;
1921         d = (entityframe5_database_t *)Mem_Alloc(pool, sizeof(*d));
1922         d->latestframenum = 0;
1923         for (i = 0;i < d->maxedicts;i++)
1924                 d->states[i] = defaultstate;
1925         return d;
1926 }
1927
1928 void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
1929 {
1930         // all the [maxedicts] memory is allocated at once, so there's only one
1931         // thing to free
1932         if (d->maxedicts)
1933                 Mem_Free(d->deltabits);
1934         Mem_Free(d);
1935 }
1936
1937 static void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
1938 {
1939         if (d->maxedicts < newmax)
1940         {
1941                 unsigned char *data;
1942                 int oldmaxedicts = d->maxedicts;
1943                 int *olddeltabits = d->deltabits;
1944                 unsigned char *oldpriorities = d->priorities;
1945                 int *oldupdateframenum = d->updateframenum;
1946                 entity_state_t *oldstates = d->states;
1947                 unsigned char *oldvisiblebits = d->visiblebits;
1948                 d->maxedicts = newmax;
1949                 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));
1950                 d->deltabits = (int *)data;data += d->maxedicts * sizeof(int);
1951                 d->priorities = (unsigned char *)data;data += d->maxedicts * sizeof(unsigned char);
1952                 d->updateframenum = (int *)data;data += d->maxedicts * sizeof(int);
1953                 d->states = (entity_state_t *)data;data += d->maxedicts * sizeof(entity_state_t);
1954                 d->visiblebits = (unsigned char *)data;data += (d->maxedicts+7)/8 * sizeof(unsigned char);
1955                 if (oldmaxedicts)
1956                 {
1957                         memcpy(d->deltabits, olddeltabits, oldmaxedicts * sizeof(int));
1958                         memcpy(d->priorities, oldpriorities, oldmaxedicts * sizeof(unsigned char));
1959                         memcpy(d->updateframenum, oldupdateframenum, oldmaxedicts * sizeof(int));
1960                         memcpy(d->states, oldstates, oldmaxedicts * sizeof(entity_state_t));
1961                         memcpy(d->visiblebits, oldvisiblebits, (oldmaxedicts+7)/8 * sizeof(unsigned char));
1962                         // the previous buffers were a single allocation, so just one free
1963                         Mem_Free(olddeltabits);
1964                 }
1965         }
1966 }
1967
1968 static int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
1969 {
1970         int limit, priority;
1971         entity_state_t *s;
1972         // if it is the player, update urgently
1973         if (stateindex == d->viewentnum)
1974                 return ENTITYFRAME5_PRIORITYLEVELS - 1;
1975         // priority increases each frame no matter what happens
1976         priority = d->priorities[stateindex] + 1;
1977         // players get an extra priority boost
1978         if (stateindex <= svs.maxclients)
1979                 priority++;
1980         // remove dead entities very quickly because they are just 2 bytes
1981         if (!d->states[stateindex].active)
1982         {
1983                 priority++;
1984                 return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
1985         }
1986         // certain changes are more noticable than others
1987         if (d->deltabits[stateindex] & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
1988                 priority++;
1989         // find the root entity this one is attached to, and judge relevance by it
1990         for (limit = 0;limit < 256;limit++)
1991         {
1992                 s = d->states + stateindex;
1993                 if (s->flags & RENDER_VIEWMODEL)
1994                         stateindex = d->viewentnum;
1995                 else if (s->tagentity)
1996                         stateindex = s->tagentity;
1997                 else
1998                         break;
1999                 if (d->maxedicts < stateindex)
2000                         EntityFrame5_ExpandEdicts(d, (stateindex+256)&~255);
2001         }
2002         if (limit >= 256)
2003                 Con_DPrintf("Protocol: Runaway loop recursing tagentity links on entity %i\n", stateindex);
2004         // now that we have the parent entity we can make some decisions based on
2005         // distance from the player
2006         if (VectorDistance(d->states[d->viewentnum].netcenter, s->netcenter) < 1024.0f)
2007                 priority++;
2008         return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
2009 }
2010
2011 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
2012 {
2013         unsigned int bits = 0;
2014         //dp_model_t *model;
2015         ENTITYSIZEPROFILING_START(msg, s->number);
2016
2017         prvm_eval_t *val;
2018         val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
2019         if(val && val->function)
2020                 return;
2021
2022         if (!s->active)
2023                 MSG_WriteShort(msg, number | 0x8000);
2024         else
2025         {
2026                 bits = changedbits;
2027                 if ((bits & E5_ORIGIN) && (s->exteriormodelforclient || s->tagentity || s->viewmodelforclient || (s->number >= 1 && s->number <= svs.maxclients) || 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))
2028                 // maybe also add: ((model = sv.models[s->modelindex]) != NULL && model->name[0] == '*')
2029                         bits |= E5_ORIGIN32;
2030                         // possible values:
2031                         //   negative origin:
2032                         //     (int)(f * 8 - 0.5) >= -32768
2033                         //          (f * 8 - 0.5) >  -32769
2034                         //           f            >  -4096.0625
2035                         //   positive origin:
2036                         //     (int)(f * 8 + 0.5) <=  32767
2037                         //          (f * 8 + 0.5) <   32768
2038                         //           f * 8 + 0.5) <   4095.9375
2039                 if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
2040                         bits |= E5_ANGLES16;
2041                 if ((bits & E5_MODEL) && s->modelindex >= 256)
2042                         bits |= E5_MODEL16;
2043                 if ((bits & E5_FRAME) && s->frame >= 256)
2044                         bits |= E5_FRAME16;
2045                 if (bits & E5_EFFECTS)
2046                 {
2047                         if (s->effects & 0xFFFF0000)
2048                                 bits |= E5_EFFECTS32;
2049                         else if (s->effects & 0xFFFFFF00)
2050                                 bits |= E5_EFFECTS16;
2051                 }
2052                 if (bits >= 256)
2053                         bits |= E5_EXTEND1;
2054                 if (bits >= 65536)
2055                         bits |= E5_EXTEND2;
2056                 if (bits >= 16777216)
2057                         bits |= E5_EXTEND3;
2058                 MSG_WriteShort(msg, number);
2059                 MSG_WriteByte(msg, bits & 0xFF);
2060                 if (bits & E5_EXTEND1)
2061                         MSG_WriteByte(msg, (bits >> 8) & 0xFF);
2062                 if (bits & E5_EXTEND2)
2063                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
2064                 if (bits & E5_EXTEND3)
2065                         MSG_WriteByte(msg, (bits >> 24) & 0xFF);
2066                 if (bits & E5_FLAGS)
2067                         MSG_WriteByte(msg, s->flags);
2068                 if (bits & E5_ORIGIN)
2069                 {
2070                         if (bits & E5_ORIGIN32)
2071                         {
2072                                 MSG_WriteCoord32f(msg, s->origin[0]);
2073                                 MSG_WriteCoord32f(msg, s->origin[1]);
2074                                 MSG_WriteCoord32f(msg, s->origin[2]);
2075                         }
2076                         else
2077                         {
2078                                 MSG_WriteCoord13i(msg, s->origin[0]);
2079                                 MSG_WriteCoord13i(msg, s->origin[1]);
2080                                 MSG_WriteCoord13i(msg, s->origin[2]);
2081                         }
2082                 }
2083                 if (bits & E5_ANGLES)
2084                 {
2085                         if (bits & E5_ANGLES16)
2086                         {
2087                                 MSG_WriteAngle16i(msg, s->angles[0]);
2088                                 MSG_WriteAngle16i(msg, s->angles[1]);
2089                                 MSG_WriteAngle16i(msg, s->angles[2]);
2090                         }
2091                         else
2092                         {
2093                                 MSG_WriteAngle8i(msg, s->angles[0]);
2094                                 MSG_WriteAngle8i(msg, s->angles[1]);
2095                                 MSG_WriteAngle8i(msg, s->angles[2]);
2096                         }
2097                 }
2098                 if (bits & E5_MODEL)
2099                 {
2100                         if (bits & E5_MODEL16)
2101                                 MSG_WriteShort(msg, s->modelindex);
2102                         else
2103                                 MSG_WriteByte(msg, s->modelindex);
2104                 }
2105                 if (bits & E5_FRAME)
2106                 {
2107                         if (bits & E5_FRAME16)
2108                                 MSG_WriteShort(msg, s->frame);
2109                         else
2110                                 MSG_WriteByte(msg, s->frame);
2111                 }
2112                 if (bits & E5_SKIN)
2113                         MSG_WriteByte(msg, s->skin);
2114                 if (bits & E5_EFFECTS)
2115                 {
2116                         if (bits & E5_EFFECTS32)
2117                                 MSG_WriteLong(msg, s->effects);
2118                         else if (bits & E5_EFFECTS16)
2119                                 MSG_WriteShort(msg, s->effects);
2120                         else
2121                                 MSG_WriteByte(msg, s->effects);
2122                 }
2123                 if (bits & E5_ALPHA)
2124                         MSG_WriteByte(msg, s->alpha);
2125                 if (bits & E5_SCALE)
2126                         MSG_WriteByte(msg, s->scale);
2127                 if (bits & E5_COLORMAP)
2128                         MSG_WriteByte(msg, s->colormap);
2129                 if (bits & E5_ATTACHMENT)
2130                 {
2131                         MSG_WriteShort(msg, s->tagentity);
2132                         MSG_WriteByte(msg, s->tagindex);
2133                 }
2134                 if (bits & E5_LIGHT)
2135                 {
2136                         MSG_WriteShort(msg, s->light[0]);
2137                         MSG_WriteShort(msg, s->light[1]);
2138                         MSG_WriteShort(msg, s->light[2]);
2139                         MSG_WriteShort(msg, s->light[3]);
2140                         MSG_WriteByte(msg, s->lightstyle);
2141                         MSG_WriteByte(msg, s->lightpflags);
2142                 }
2143                 if (bits & E5_GLOW)
2144                 {
2145                         MSG_WriteByte(msg, s->glowsize);
2146                         MSG_WriteByte(msg, s->glowcolor);
2147                 }
2148                 if (bits & E5_COLORMOD)
2149                 {
2150                         MSG_WriteByte(msg, s->colormod[0]);
2151                         MSG_WriteByte(msg, s->colormod[1]);
2152                         MSG_WriteByte(msg, s->colormod[2]);
2153                 }
2154         }
2155
2156         ENTITYSIZEPROFILING_END(msg, s->number);
2157 }
2158
2159 static void EntityState5_ReadUpdate(entity_state_t *s, int number)
2160 {
2161         int bits;
2162         bits = MSG_ReadByte();
2163         if (bits & E5_EXTEND1)
2164         {
2165                 bits |= MSG_ReadByte() << 8;
2166                 if (bits & E5_EXTEND2)
2167                 {
2168                         bits |= MSG_ReadByte() << 16;
2169                         if (bits & E5_EXTEND3)
2170                                 bits |= MSG_ReadByte() << 24;
2171                 }
2172         }
2173         if (bits & E5_FULLUPDATE)
2174         {
2175                 *s = defaultstate;
2176                 s->active = true;
2177         }
2178         if (bits & E5_FLAGS)
2179                 s->flags = MSG_ReadByte();
2180         if (bits & E5_ORIGIN)
2181         {
2182                 if (bits & E5_ORIGIN32)
2183                 {
2184                         s->origin[0] = MSG_ReadCoord32f();
2185                         s->origin[1] = MSG_ReadCoord32f();
2186                         s->origin[2] = MSG_ReadCoord32f();
2187                 }
2188                 else
2189                 {
2190                         s->origin[0] = MSG_ReadCoord13i();
2191                         s->origin[1] = MSG_ReadCoord13i();
2192                         s->origin[2] = MSG_ReadCoord13i();
2193                 }
2194         }
2195         if (bits & E5_ANGLES)
2196         {
2197                 if (bits & E5_ANGLES16)
2198                 {
2199                         s->angles[0] = MSG_ReadAngle16i();
2200                         s->angles[1] = MSG_ReadAngle16i();
2201                         s->angles[2] = MSG_ReadAngle16i();
2202                 }
2203                 else
2204                 {
2205                         s->angles[0] = MSG_ReadAngle8i();
2206                         s->angles[1] = MSG_ReadAngle8i();
2207                         s->angles[2] = MSG_ReadAngle8i();
2208                 }
2209         }
2210         if (bits & E5_MODEL)
2211         {
2212                 if (bits & E5_MODEL16)
2213                         s->modelindex = (unsigned short) MSG_ReadShort();
2214                 else
2215                         s->modelindex = MSG_ReadByte();
2216         }
2217         if (bits & E5_FRAME)
2218         {
2219                 if (bits & E5_FRAME16)
2220                         s->frame = (unsigned short) MSG_ReadShort();
2221                 else
2222                         s->frame = MSG_ReadByte();
2223         }
2224         if (bits & E5_SKIN)
2225                 s->skin = MSG_ReadByte();
2226         if (bits & E5_EFFECTS)
2227         {
2228                 if (bits & E5_EFFECTS32)
2229                         s->effects = (unsigned int) MSG_ReadLong();
2230                 else if (bits & E5_EFFECTS16)
2231                         s->effects = (unsigned short) MSG_ReadShort();
2232                 else
2233                         s->effects = MSG_ReadByte();
2234         }
2235         if (bits & E5_ALPHA)
2236                 s->alpha = MSG_ReadByte();
2237         if (bits & E5_SCALE)
2238                 s->scale = MSG_ReadByte();
2239         if (bits & E5_COLORMAP)
2240                 s->colormap = MSG_ReadByte();
2241         if (bits & E5_ATTACHMENT)
2242         {
2243                 s->tagentity = (unsigned short) MSG_ReadShort();
2244                 s->tagindex = MSG_ReadByte();
2245         }
2246         if (bits & E5_LIGHT)
2247         {
2248                 s->light[0] = (unsigned short) MSG_ReadShort();
2249                 s->light[1] = (unsigned short) MSG_ReadShort();
2250                 s->light[2] = (unsigned short) MSG_ReadShort();
2251                 s->light[3] = (unsigned short) MSG_ReadShort();
2252                 s->lightstyle = MSG_ReadByte();
2253                 s->lightpflags = MSG_ReadByte();
2254         }
2255         if (bits & E5_GLOW)
2256         {
2257                 s->glowsize = MSG_ReadByte();
2258                 s->glowcolor = MSG_ReadByte();
2259         }
2260         if (bits & E5_COLORMOD)
2261         {
2262                 s->colormod[0] = MSG_ReadByte();
2263                 s->colormod[1] = MSG_ReadByte();
2264                 s->colormod[2] = MSG_ReadByte();
2265         }
2266
2267
2268         if (developer_networkentities.integer >= 2)
2269         {
2270                 Con_Printf("ReadFields e%i", number);
2271
2272                 if (bits & E5_ORIGIN)
2273                         Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
2274                 if (bits & E5_ANGLES)
2275                         Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
2276                 if (bits & E5_MODEL)
2277                         Con_Printf(" E5_MODEL %i", s->modelindex);
2278                 if (bits & E5_FRAME)
2279                         Con_Printf(" E5_FRAME %i", s->frame);
2280                 if (bits & E5_SKIN)
2281                         Con_Printf(" E5_SKIN %i", s->skin);
2282                 if (bits & E5_EFFECTS)
2283                         Con_Printf(" E5_EFFECTS %i", s->effects);
2284                 if (bits & E5_FLAGS)
2285                 {
2286                         Con_Printf(" E5_FLAGS %i (", s->flags);
2287                         if (s->flags & RENDER_STEP)
2288                                 Con_Print(" STEP");
2289                         if (s->flags & RENDER_GLOWTRAIL)
2290                                 Con_Print(" GLOWTRAIL");
2291                         if (s->flags & RENDER_VIEWMODEL)
2292                                 Con_Print(" VIEWMODEL");
2293                         if (s->flags & RENDER_EXTERIORMODEL)
2294                                 Con_Print(" EXTERIORMODEL");
2295                         if (s->flags & RENDER_LOWPRECISION)
2296                                 Con_Print(" LOWPRECISION");
2297                         if (s->flags & RENDER_COLORMAPPED)
2298                                 Con_Print(" COLORMAPPED");
2299                         if (s->flags & RENDER_SHADOW)
2300                                 Con_Print(" SHADOW");
2301                         if (s->flags & RENDER_LIGHT)
2302                                 Con_Print(" LIGHT");
2303                         if (s->flags & RENDER_NOSELFSHADOW)
2304                                 Con_Print(" NOSELFSHADOW");
2305                         Con_Print(")");
2306                 }
2307                 if (bits & E5_ALPHA)
2308                         Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
2309                 if (bits & E5_SCALE)
2310                         Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
2311                 if (bits & E5_COLORMAP)
2312                         Con_Printf(" E5_COLORMAP %i", s->colormap);
2313                 if (bits & E5_ATTACHMENT)
2314                         Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
2315                 if (bits & E5_LIGHT)
2316                         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);
2317                 if (bits & E5_GLOW)
2318                         Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
2319                 if (bits & E5_COLORMOD)
2320                         Con_Printf(" E5_COLORMOD %f:%f:%f", s->colormod[0] / 32.0f, s->colormod[1] / 32.0f, s->colormod[2] / 32.0f);
2321                 Con_Print("\n");
2322         }
2323 }
2324
2325 static int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
2326 {
2327         unsigned int bits = 0;
2328         if (n->active)
2329         {
2330                 if (!o->active)
2331                         bits |= E5_FULLUPDATE;
2332                 if (!VectorCompare(o->origin, n->origin))
2333                         bits |= E5_ORIGIN;
2334                 if (!VectorCompare(o->angles, n->angles))
2335                         bits |= E5_ANGLES;
2336                 if (o->modelindex != n->modelindex)
2337                         bits |= E5_MODEL;
2338                 if (o->frame != n->frame)
2339                         bits |= E5_FRAME;
2340                 if (o->skin != n->skin)
2341                         bits |= E5_SKIN;
2342                 if (o->effects != n->effects)
2343                         bits |= E5_EFFECTS;
2344                 if (o->flags != n->flags)
2345                         bits |= E5_FLAGS;
2346                 if (o->alpha != n->alpha)
2347                         bits |= E5_ALPHA;
2348                 if (o->scale != n->scale)
2349                         bits |= E5_SCALE;
2350                 if (o->colormap != n->colormap)
2351                         bits |= E5_COLORMAP;
2352                 if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
2353                         bits |= E5_ATTACHMENT;
2354                 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)
2355                         bits |= E5_LIGHT;
2356                 if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
2357                         bits |= E5_GLOW;
2358                 if (o->colormod[0] != n->colormod[0] || o->colormod[1] != n->colormod[1] || o->colormod[2] != n->colormod[2])
2359                         bits |= E5_COLORMOD;
2360         }
2361         else
2362                 if (o->active)
2363                         bits |= E5_FULLUPDATE;
2364         return bits;
2365 }
2366
2367 void EntityFrame5_CL_ReadFrame(void)
2368 {
2369         int i, n, enumber;
2370         entity_t *ent;
2371         entity_state_t *s;
2372         // read the number of this frame to echo back in next input packet
2373         for (i = 0;i < LATESTFRAMENUMS-1;i++)
2374                 cl.latestframenums[i] = cl.latestframenums[i+1];
2375         cl.latestframenums[LATESTFRAMENUMS-1] = MSG_ReadLong();
2376         if (developer_networkentities.integer >= 10)
2377                 Con_Printf("recv: svc_entities %i\n", cl.latestframenums[LATESTFRAMENUMS-1]);
2378         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)
2379                 cls.servermovesequence = MSG_ReadLong();
2380         // read entity numbers until we find a 0x8000
2381         // (which would be remove world entity, but is actually a terminator)
2382         while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
2383         {
2384                 // get the entity number
2385                 enumber = n & 0x7FFF;
2386                 // we may need to expand the array
2387                 if (cl.num_entities <= enumber)
2388                 {
2389                         cl.num_entities = enumber + 1;
2390                         if (enumber >= cl.max_entities)
2391                                 CL_ExpandEntities(enumber);
2392                 }
2393                 // look up the entity
2394                 ent = cl.entities + enumber;
2395                 // slide the current into the previous slot
2396                 ent->state_previous = ent->state_current;
2397                 // read the update
2398                 s = &ent->state_current;
2399                 if (n & 0x8000)
2400                 {
2401                         // remove entity
2402                         *s = defaultstate;
2403                 }
2404                 else
2405                 {
2406                         // update entity
2407                         EntityState5_ReadUpdate(s, enumber);
2408                 }
2409                 // set the cl.entities_active flag
2410                 cl.entities_active[enumber] = s->active;
2411                 // set the update time
2412                 s->time = cl.mtime[0];
2413                 // fix the number (it gets wiped occasionally by copying from defaultstate)
2414                 s->number = enumber;
2415                 // check if we need to update the lerp stuff
2416                 if (s->active)
2417                         CL_MoveLerpEntityStates(&cl.entities[enumber]);
2418                 // print extra messages if desired
2419                 if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
2420                 {
2421                         if (cl.entities[enumber].state_current.active)
2422                                 Con_Printf("entity #%i has become active\n", enumber);
2423                         else if (cl.entities[enumber].state_previous.active)
2424                                 Con_Printf("entity #%i has become inactive\n", enumber);
2425                 }
2426         }
2427 }
2428
2429 void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum)
2430 {
2431         int i, j, k, l, bits;
2432         entityframe5_changestate_t *s, *s2;
2433         entityframe5_packetlog_t *p, *p2;
2434         unsigned char statsdeltabits[(MAX_CL_STATS+7)/8];
2435         // scan for packets that were lost
2436         for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
2437         {
2438                 if (p->packetnumber && p->packetnumber <= framenum)
2439                 {
2440                         // packet was lost - merge deltabits into the main array so they
2441                         // will be re-sent, but only if there is no newer update of that
2442                         // bit in the logs (as those will arrive before this update)
2443                         for (j = 0, s = p->states;j < p->numstates;j++, s++)
2444                         {
2445                                 // check for any newer updates to this entity and mask off any
2446                                 // overlapping bits (we don't need to send something again if
2447                                 // it has already been sent more recently)
2448                                 bits = s->bits & ~d->deltabits[s->number];
2449                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
2450                                 {
2451                                         if (p2->packetnumber > framenum)
2452                                         {
2453                                                 for (l = 0, s2 = p2->states;l < p2->numstates;l++, s2++)
2454                                                 {
2455                                                         if (s2->number == s->number)
2456                                                         {
2457                                                                 bits &= ~s2->bits;
2458                                                                 break;
2459                                                         }
2460                                                 }
2461                                         }
2462                                 }
2463                                 // if the bits haven't all been cleared, there were some bits
2464                                 // lost with this packet, so set them again now
2465                                 if (bits)
2466                                 {
2467                                         d->deltabits[s->number] |= bits;
2468                                         // if it was a very important update, set priority higher
2469                                         if (bits & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_COLORMAP))
2470                                                 d->priorities[s->number] = max(d->priorities[s->number], 4);
2471                                         else
2472                                                 d->priorities[s->number] = max(d->priorities[s->number], 1);
2473                                 }
2474                         }
2475                         // mark lost stats
2476                         for (j = 0;j < MAX_CL_STATS;j++)
2477                         {
2478                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2479                                         statsdeltabits[l] = p->statsdeltabits[l] & ~host_client->statsdeltabits[l];
2480                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS;k++, p2++)
2481                                         if (p2->packetnumber > framenum)
2482                                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2483                                                         statsdeltabits[l] = p->statsdeltabits[l] & ~p2->statsdeltabits[l];
2484                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2485                                         host_client->statsdeltabits[l] |= statsdeltabits[l];
2486                         }
2487                         // delete this packet log as it is now obsolete
2488                         p->packetnumber = 0;
2489                 }
2490         }
2491 }
2492
2493 void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
2494 {
2495         int i;
2496         // scan for packets made obsolete by this ack and delete them
2497         for (i = 0;i < ENTITYFRAME5_MAXPACKETLOGS;i++)
2498                 if (d->packetlog[i].packetnumber <= framenum)
2499                         d->packetlog[i].packetnumber = 0;
2500 }
2501
2502 void EntityFrame5_WriteFrame(sizebuf_t *msg, int maxsize, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int movesequence, qboolean need_empty)
2503 {
2504         const entity_state_t *n;
2505         int i, num, l, framenum, packetlognumber, priority;
2506         sizebuf_t buf;
2507         unsigned char data[128];
2508         entityframe5_packetlog_t *packetlog;
2509
2510         if (prog->max_edicts > d->maxedicts)
2511                 EntityFrame5_ExpandEdicts(d, prog->max_edicts);
2512
2513         framenum = d->latestframenum + 1;
2514         d->viewentnum = viewentnum;
2515
2516         // if packet log is full, mark all frames as lost, this will cause
2517         // it to send the lost data again
2518         for (packetlognumber = 0;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++)
2519                 if (d->packetlog[packetlognumber].packetnumber == 0)
2520                         break;
2521         if (packetlognumber == ENTITYFRAME5_MAXPACKETLOGS)
2522         {
2523                 Con_DPrintf("EntityFrame5_WriteFrame: packetlog overflow for a client, resetting\n");
2524                 EntityFrame5_LostFrame(d, framenum);
2525                 packetlognumber = 0;
2526         }
2527
2528         // prepare the buffer
2529         memset(&buf, 0, sizeof(buf));
2530         buf.data = data;
2531         buf.maxsize = sizeof(data);
2532
2533         // detect changes in states
2534         num = 1;
2535         for (i = 0, n = states;i < numstates;i++, n++)
2536         {
2537                 // mark gaps in entity numbering as removed entities
2538                 for (;num < n->number;num++)
2539                 {
2540                         // if the entity used to exist, clear it
2541                         if (CHECKPVSBIT(d->visiblebits, num))
2542                         {
2543                                 CLEARPVSBIT(d->visiblebits, num);
2544                                 d->deltabits[num] = E5_FULLUPDATE;
2545                                 d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2546                                 d->states[num] = defaultstate;
2547                                 d->states[num].number = num;
2548                         }
2549                 }
2550                 // update the entity state data
2551                 if (!CHECKPVSBIT(d->visiblebits, num))
2552                 {
2553                         // entity just spawned in, don't let it completely hog priority
2554                         // because of being ancient on the first frame
2555                         d->updateframenum[num] = framenum;
2556                         // initial priority is a bit high to make projectiles send on the
2557                         // first frame, among other things
2558                         d->priorities[num] = max(d->priorities[num], 4);
2559                 }
2560                 SETPVSBIT(d->visiblebits, num);
2561                 d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
2562                 d->priorities[num] = max(d->priorities[num], 1);
2563                 d->states[num] = *n;
2564                 d->states[num].number = num;
2565                 // advance to next entity so the next iteration doesn't immediately remove it
2566                 num++;
2567         }
2568         // all remaining entities are dead
2569         for (;num < d->maxedicts;num++)
2570         {
2571                 if (CHECKPVSBIT(d->visiblebits, num))
2572                 {
2573                         CLEARPVSBIT(d->visiblebits, num);
2574                         d->deltabits[num] = E5_FULLUPDATE;
2575                         d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2576                         d->states[num] = defaultstate;
2577                         d->states[num].number = num;
2578                 }
2579         }
2580
2581         // if there isn't at least enough room for an empty svc_entities,
2582         // don't bother trying...
2583         if (buf.cursize + 11 > buf.maxsize)
2584                 return;
2585
2586         // build lists of entities by priority level
2587         memset(d->prioritychaincounts, 0, sizeof(d->prioritychaincounts));
2588         l = 0;
2589         for (num = 0;num < d->maxedicts;num++)
2590         {
2591                 if (d->priorities[num])
2592                 {
2593                         if (d->deltabits[num])
2594                         {
2595                                 if (d->priorities[num] < (ENTITYFRAME5_PRIORITYLEVELS - 1))
2596                                         d->priorities[num] = EntityState5_Priority(d, num);
2597                                 l = num;
2598                                 priority = d->priorities[num];
2599                                 if (d->prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
2600                                         d->prioritychains[priority][d->prioritychaincounts[priority]++] = num;
2601                         }
2602                         else
2603                                 d->priorities[num] = 0;
2604                 }
2605         }
2606
2607         // add packetlog entry
2608         packetlog = d->packetlog + packetlognumber;
2609         packetlog->packetnumber = framenum;
2610         packetlog->numstates = 0;
2611         // write stat updates
2612         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)
2613         {
2614                 for (i = 0;i < MAX_CL_STATS && msg->cursize + 6 + 11 <= maxsize;i++)
2615                 {
2616                         if (host_client->statsdeltabits[i>>3] & (1<<(i&7)))
2617                         {
2618                                 host_client->statsdeltabits[i>>3] &= ~(1<<(i&7));
2619                                 packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
2620                                 if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
2621                                 {
2622                                         MSG_WriteByte(msg, svc_updatestatubyte);
2623                                         MSG_WriteByte(msg, i);
2624                                         MSG_WriteByte(msg, host_client->stats[i]);
2625                                         l = 1;
2626                                 }
2627                                 else
2628                                 {
2629                                         MSG_WriteByte(msg, svc_updatestat);
2630                                         MSG_WriteByte(msg, i);
2631                                         MSG_WriteLong(msg, host_client->stats[i]);
2632                                         l = 1;
2633                                 }
2634                         }
2635                 }
2636         }
2637
2638         // only send empty svc_entities frame if needed
2639         if(!l && !need_empty)
2640                 return;
2641
2642         // write state updates
2643         if (developer_networkentities.integer >= 10)
2644                 Con_Printf("send: svc_entities %i\n", framenum);
2645         d->latestframenum = framenum;
2646         MSG_WriteByte(msg, svc_entities);
2647         MSG_WriteLong(msg, framenum);
2648         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)
2649                 MSG_WriteLong(msg, movesequence);
2650         for (priority = ENTITYFRAME5_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
2651         {
2652                 for (i = 0;i < d->prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
2653                 {
2654                         num = d->prioritychains[priority][i];
2655                         n = d->states + num;
2656                         if (d->deltabits[num] & E5_FULLUPDATE)
2657                                 d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
2658                         buf.cursize = 0;
2659                         EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
2660                         // if the entity won't fit, try the next one
2661                         if (msg->cursize + buf.cursize + 2 > maxsize)
2662                                 continue;
2663                         // write entity to the packet
2664                         SZ_Write(msg, buf.data, buf.cursize);
2665                         // mark age on entity for prioritization
2666                         d->updateframenum[num] = framenum;
2667                         // log entity so deltabits can be restored later if lost
2668                         packetlog->states[packetlog->numstates].number = num;
2669                         packetlog->states[packetlog->numstates].bits = d->deltabits[num];
2670                         packetlog->numstates++;
2671                         // clear deltabits and priority so it won't be sent again
2672                         d->deltabits[num] = 0;
2673                         d->priorities[num] = 0;
2674                 }
2675         }
2676         MSG_WriteShort(msg, 0x8000);
2677 }
2678
2679
2680 static void QW_TranslateEffects(entity_state_t *s, int qweffects)
2681 {
2682         s->effects = 0;
2683         s->internaleffects = 0;
2684         if (qweffects & QW_EF_BRIGHTFIELD)
2685                 s->effects |= EF_BRIGHTFIELD;
2686         if (qweffects & QW_EF_MUZZLEFLASH)
2687                 s->effects |= EF_MUZZLEFLASH;
2688         if (qweffects & QW_EF_FLAG1)
2689         {
2690                 // mimic FTEQW's interpretation of EF_FLAG1 as EF_NODRAW on non-player entities
2691                 if (s->number > cl.maxclients)
2692                         s->effects |= EF_NODRAW;
2693                 else
2694                         s->internaleffects |= INTEF_FLAG1QW;
2695         }
2696         if (qweffects & QW_EF_FLAG2)
2697         {
2698                 // mimic FTEQW's interpretation of EF_FLAG2 as EF_ADDITIVE on non-player entities
2699                 if (s->number > cl.maxclients)
2700                         s->effects |= EF_ADDITIVE;
2701                 else
2702                         s->internaleffects |= INTEF_FLAG2QW;
2703         }
2704         if (qweffects & QW_EF_RED)
2705         {
2706                 if (qweffects & QW_EF_BLUE)
2707                         s->effects |= EF_RED | EF_BLUE;
2708                 else
2709                         s->effects |= EF_RED;
2710         }
2711         else if (qweffects & QW_EF_BLUE)
2712                 s->effects |= EF_BLUE;
2713         else if (qweffects & QW_EF_BRIGHTLIGHT)
2714                 s->effects |= EF_BRIGHTLIGHT;
2715         else if (qweffects & QW_EF_DIMLIGHT)
2716                 s->effects |= EF_DIMLIGHT;
2717 }
2718
2719 void EntityStateQW_ReadPlayerUpdate(void)
2720 {
2721         int slot = MSG_ReadByte();
2722         int enumber = slot + 1;
2723         int weaponframe;
2724         int msec;
2725         int playerflags;
2726         int bits;
2727         entity_state_t *s;
2728         // look up the entity
2729         entity_t *ent = cl.entities + enumber;
2730         vec3_t viewangles;
2731         vec3_t velocity;
2732
2733         // slide the current state into the previous
2734         ent->state_previous = ent->state_current;
2735
2736         // read the update
2737         s = &ent->state_current;
2738         *s = defaultstate;
2739         s->active = true;
2740         s->number = enumber;
2741         s->colormap = enumber;
2742         playerflags = MSG_ReadShort();
2743         MSG_ReadVector(s->origin, cls.protocol);
2744         s->frame = MSG_ReadByte();
2745
2746         VectorClear(viewangles);
2747         VectorClear(velocity);
2748
2749         if (playerflags & QW_PF_MSEC)
2750         {
2751                 // time difference between last update this player sent to the server,
2752                 // and last input we sent to the server (this packet is in response to
2753                 // our input, so msec is how long ago the last update of this player
2754                 // entity occurred, compared to our input being received)
2755                 msec = MSG_ReadByte();
2756         }
2757         else
2758                 msec = 0;
2759         if (playerflags & QW_PF_COMMAND)
2760         {
2761                 bits = MSG_ReadByte();
2762                 if (bits & QW_CM_ANGLE1)
2763                         viewangles[0] = MSG_ReadAngle16i(); // cmd->angles[0]
2764                 if (bits & QW_CM_ANGLE2)
2765                         viewangles[1] = MSG_ReadAngle16i(); // cmd->angles[1]
2766                 if (bits & QW_CM_ANGLE3)
2767                         viewangles[2] = MSG_ReadAngle16i(); // cmd->angles[2]
2768                 if (bits & QW_CM_FORWARD)
2769                         MSG_ReadShort(); // cmd->forwardmove
2770                 if (bits & QW_CM_SIDE)
2771                         MSG_ReadShort(); // cmd->sidemove
2772                 if (bits & QW_CM_UP)
2773                         MSG_ReadShort(); // cmd->upmove
2774                 if (bits & QW_CM_BUTTONS)
2775                         MSG_ReadByte(); // cmd->buttons
2776                 if (bits & QW_CM_IMPULSE)
2777                         MSG_ReadByte(); // cmd->impulse
2778                 MSG_ReadByte(); // cmd->msec
2779         }
2780         if (playerflags & QW_PF_VELOCITY1)
2781                 velocity[0] = MSG_ReadShort();
2782         if (playerflags & QW_PF_VELOCITY2)
2783                 velocity[1] = MSG_ReadShort();
2784         if (playerflags & QW_PF_VELOCITY3)
2785                 velocity[2] = MSG_ReadShort();
2786         if (playerflags & QW_PF_MODEL)
2787                 s->modelindex = MSG_ReadByte();
2788         else
2789                 s->modelindex = cl.qw_modelindex_player;
2790         if (playerflags & QW_PF_SKINNUM)
2791                 s->skin = MSG_ReadByte();
2792         if (playerflags & QW_PF_EFFECTS)
2793                 QW_TranslateEffects(s, MSG_ReadByte());
2794         if (playerflags & QW_PF_WEAPONFRAME)
2795                 weaponframe = MSG_ReadByte();
2796         else
2797                 weaponframe = 0;
2798
2799         if (enumber == cl.playerentity)
2800         {
2801                 // if this is an update on our player, update the angles
2802                 VectorCopy(cl.viewangles, viewangles);
2803         }
2804
2805         // calculate the entity angles from the viewangles
2806         s->angles[0] = viewangles[0] * -0.0333;
2807         s->angles[1] = viewangles[1];
2808         s->angles[2] = 0;
2809         s->angles[2] = V_CalcRoll(s->angles, velocity)*4;
2810
2811         // if this is an update on our player, update interpolation state
2812         if (enumber == cl.playerentity)
2813         {
2814                 VectorCopy (cl.mpunchangle[0], cl.mpunchangle[1]);
2815                 VectorCopy (cl.mpunchvector[0], cl.mpunchvector[1]);
2816                 VectorCopy (cl.mvelocity[0], cl.mvelocity[1]);
2817                 cl.mviewzoom[1] = cl.mviewzoom[0];
2818
2819                 cl.idealpitch = 0;
2820                 cl.mpunchangle[0][0] = 0;
2821                 cl.mpunchangle[0][1] = 0;
2822                 cl.mpunchangle[0][2] = 0;
2823                 cl.mpunchvector[0][0] = 0;
2824                 cl.mpunchvector[0][1] = 0;
2825                 cl.mpunchvector[0][2] = 0;
2826                 cl.mvelocity[0][0] = 0;
2827                 cl.mvelocity[0][1] = 0;
2828                 cl.mvelocity[0][2] = 0;
2829                 cl.mviewzoom[0] = 1;
2830
2831                 VectorCopy(velocity, cl.mvelocity[0]);
2832                 cl.stats[STAT_WEAPONFRAME] = weaponframe;
2833                 if (playerflags & QW_PF_GIB)
2834                         cl.stats[STAT_VIEWHEIGHT] = 8;
2835                 else if (playerflags & QW_PF_DEAD)
2836                         cl.stats[STAT_VIEWHEIGHT] = -16;
2837                 else
2838                         cl.stats[STAT_VIEWHEIGHT] = 22;
2839         }
2840
2841         // set the cl.entities_active flag
2842         cl.entities_active[enumber] = s->active;
2843         // set the update time
2844         s->time = cl.mtime[0] - msec * 0.001; // qw has no clock
2845         // check if we need to update the lerp stuff
2846         if (s->active)
2847                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
2848 }
2849
2850 static void EntityStateQW_ReadEntityUpdate(entity_state_t *s, int bits)
2851 {
2852         int qweffects = 0;
2853         s->active = true;
2854         s->number = bits & 511;
2855         bits &= ~511;
2856         if (bits & QW_U_MOREBITS)
2857                 bits |= MSG_ReadByte();
2858
2859         // store the QW_U_SOLID bit here?
2860
2861         if (bits & QW_U_MODEL)
2862                 s->modelindex = MSG_ReadByte();
2863         if (bits & QW_U_FRAME)
2864                 s->frame = MSG_ReadByte();
2865         if (bits & QW_U_COLORMAP)
2866                 s->colormap = MSG_ReadByte();
2867         if (bits & QW_U_SKIN)
2868                 s->skin = MSG_ReadByte();
2869         if (bits & QW_U_EFFECTS)
2870                 QW_TranslateEffects(s, qweffects = MSG_ReadByte());
2871         if (bits & QW_U_ORIGIN1)
2872                 s->origin[0] = MSG_ReadCoord13i();
2873         if (bits & QW_U_ANGLE1)
2874                 s->angles[0] = MSG_ReadAngle8i();
2875         if (bits & QW_U_ORIGIN2)
2876                 s->origin[1] = MSG_ReadCoord13i();
2877         if (bits & QW_U_ANGLE2)
2878                 s->angles[1] = MSG_ReadAngle8i();
2879         if (bits & QW_U_ORIGIN3)
2880                 s->origin[2] = MSG_ReadCoord13i();
2881         if (bits & QW_U_ANGLE3)
2882                 s->angles[2] = MSG_ReadAngle8i();
2883
2884         if (developer_networkentities.integer >= 2)
2885         {
2886                 Con_Printf("ReadFields e%i", s->number);
2887                 if (bits & QW_U_MODEL)
2888                         Con_Printf(" U_MODEL %i", s->modelindex);
2889                 if (bits & QW_U_FRAME)
2890                         Con_Printf(" U_FRAME %i", s->frame);
2891                 if (bits & QW_U_COLORMAP)
2892                         Con_Printf(" U_COLORMAP %i", s->colormap);
2893                 if (bits & QW_U_SKIN)
2894                         Con_Printf(" U_SKIN %i", s->skin);
2895                 if (bits & QW_U_EFFECTS)
2896                         Con_Printf(" U_EFFECTS %i", qweffects);
2897                 if (bits & QW_U_ORIGIN1)
2898                         Con_Printf(" U_ORIGIN1 %f", s->origin[0]);
2899                 if (bits & QW_U_ANGLE1)
2900                         Con_Printf(" U_ANGLE1 %f", s->angles[0]);
2901                 if (bits & QW_U_ORIGIN2)
2902                         Con_Printf(" U_ORIGIN2 %f", s->origin[1]);
2903                 if (bits & QW_U_ANGLE2)
2904                         Con_Printf(" U_ANGLE2 %f", s->angles[1]);
2905                 if (bits & QW_U_ORIGIN3)
2906                         Con_Printf(" U_ORIGIN3 %f", s->origin[2]);
2907                 if (bits & QW_U_ANGLE3)
2908                         Con_Printf(" U_ANGLE3 %f", s->angles[2]);
2909                 if (bits & QW_U_SOLID)
2910                         Con_Printf(" U_SOLID");
2911                 Con_Print("\n");
2912         }
2913 }
2914
2915 entityframeqw_database_t *EntityFrameQW_AllocDatabase(mempool_t *pool)
2916 {
2917         entityframeqw_database_t *d;
2918         d = (entityframeqw_database_t *)Mem_Alloc(pool, sizeof(*d));
2919         return d;
2920 }
2921
2922 void EntityFrameQW_FreeDatabase(entityframeqw_database_t *d)
2923 {
2924         Mem_Free(d);
2925 }
2926
2927 void EntityFrameQW_CL_ReadFrame(qboolean delta)
2928 {
2929         qboolean invalid = false;
2930         int number, oldsnapindex, newsnapindex, oldindex, newindex, oldnum, newnum;
2931         entity_t *ent;
2932         entityframeqw_database_t *d;
2933         entityframeqw_snapshot_t *oldsnap, *newsnap;
2934
2935         if (!cl.entitydatabaseqw)
2936                 cl.entitydatabaseqw = EntityFrameQW_AllocDatabase(cls.levelmempool);
2937         d = cl.entitydatabaseqw;
2938
2939         // there is no cls.netcon in demos, so this reading code can't access
2940         // cls.netcon-> at all...  so cls.qw_incoming_sequence and
2941         // cls.qw_outgoing_sequence are updated every time the corresponding
2942         // cls.netcon->qw. variables are updated
2943         // read the number of this frame to echo back in next input packet
2944         cl.qw_validsequence = cls.qw_incoming_sequence;
2945         newsnapindex = cl.qw_validsequence & QW_UPDATE_MASK;
2946         newsnap = d->snapshot + newsnapindex;
2947         memset(newsnap, 0, sizeof(*newsnap));
2948         oldsnapindex = -1;
2949         oldsnap = NULL;
2950         if (delta)
2951         {
2952                 number = MSG_ReadByte();
2953                 oldsnapindex = cl.qw_deltasequence[newsnapindex];
2954                 if ((number & QW_UPDATE_MASK) != (oldsnapindex & QW_UPDATE_MASK))
2955                         Con_DPrintf("WARNING: from mismatch\n");
2956                 if (oldsnapindex != -1)
2957                 {
2958                         if (cls.qw_outgoing_sequence - oldsnapindex >= QW_UPDATE_BACKUP-1)
2959                         {
2960                                 Con_DPrintf("delta update too old\n");
2961                                 newsnap->invalid = invalid = true; // too old
2962                                 delta = false;
2963                         }
2964                         oldsnap = d->snapshot + (oldsnapindex & QW_UPDATE_MASK);
2965                 }
2966                 else
2967                         delta = false;
2968         }
2969
2970         // if we can't decode this frame properly, report that to the server
2971         if (invalid)
2972                 cl.qw_validsequence = 0;
2973
2974         // read entity numbers until we find a 0x0000
2975         // (which would be an empty update on world entity, but is actually a terminator)
2976         newsnap->num_entities = 0;
2977         oldindex = 0;
2978         for (;;)
2979         {
2980                 int word = (unsigned short)MSG_ReadShort();
2981                 if (msg_badread)
2982                         return; // just return, the main parser will print an error
2983                 newnum = word == 0 ? 512 : (word & 511);
2984                 oldnum = delta ? (oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number) : 9999;
2985
2986                 // copy unmodified oldsnap entities
2987                 while (newnum > oldnum) // delta only
2988                 {
2989                         if (developer_networkentities.integer >= 2)
2990                                 Con_Printf("copy %i\n", oldnum);
2991                         // copy one of the old entities
2992                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2993                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2994                         newsnap->entities[newsnap->num_entities] = oldsnap->entities[oldindex++];
2995                         newsnap->num_entities++;
2996                         oldnum = oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number;
2997                 }
2998
2999                 if (word == 0)
3000                         break;
3001
3002                 if (developer_networkentities.integer >= 2)
3003                 {
3004                         if (word & QW_U_REMOVE)
3005                                 Con_Printf("remove %i\n", newnum);
3006                         else if (newnum == oldnum)
3007                                 Con_Printf("delta %i\n", newnum);
3008                         else
3009                                 Con_Printf("baseline %i\n", newnum);
3010                 }
3011
3012                 if (word & QW_U_REMOVE)
3013                 {
3014                         if (newnum != oldnum && !delta && !invalid)
3015                         {
3016                                 cl.qw_validsequence = 0;
3017                                 Con_Printf("WARNING: U_REMOVE %i on full update\n", newnum);
3018                         }
3019                 }
3020                 else
3021                 {
3022                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
3023                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
3024                         newsnap->entities[newsnap->num_entities] = (newnum == oldnum) ? oldsnap->entities[oldindex] : cl.entities[newnum].state_baseline;
3025                         EntityStateQW_ReadEntityUpdate(newsnap->entities + newsnap->num_entities, word);
3026                         newsnap->num_entities++;
3027                 }
3028
3029                 if (newnum == oldnum)
3030                         oldindex++;
3031         }
3032
3033         // expand cl.num_entities to include every entity we've seen this game
3034         newnum = newsnap->num_entities ? newsnap->entities[newsnap->num_entities - 1].number : 1;
3035         if (cl.num_entities <= newnum)
3036         {
3037                 cl.num_entities = newnum + 1;
3038                 if (cl.max_entities < newnum + 1)
3039                         CL_ExpandEntities(newnum);
3040         }
3041
3042         // now update the non-player entities from the snapshot states
3043         number = cl.maxclients + 1;
3044         for (newindex = 0;;newindex++)
3045         {
3046                 newnum = newindex >= newsnap->num_entities ? cl.num_entities : newsnap->entities[newindex].number;
3047                 // kill any missing entities
3048                 for (;number < newnum;number++)
3049                 {
3050                         if (cl.entities_active[number])
3051                         {
3052                                 cl.entities_active[number] = false;
3053                                 cl.entities[number].state_current.active = false;
3054                         }
3055                 }
3056                 if (number >= cl.num_entities)
3057                         break;
3058                 // update the entity
3059                 ent = &cl.entities[number];
3060                 ent->state_previous = ent->state_current;
3061                 ent->state_current = newsnap->entities[newindex];
3062                 ent->state_current.time = cl.mtime[0];
3063                 CL_MoveLerpEntityStates(ent);
3064                 // the entity lives again...
3065                 cl.entities_active[number] = true;
3066                 number++;
3067         }
3068 }