protocol.c

   1
   2 #include "quakedef.h"
   3
   4 // this is 88 bytes (must match entity_state_t in protocol.h)
   5 entity_state_t defaultstate =
   6 {
   7         // ! means this is not sent to client
   8         0,//double time; // ! time this state was built (used on client for interpolation)
   9         {0,0,0},//float netcenter[3]; // ! for network prioritization, this is the center of the bounding box (which may differ from the origin)
  10         {0,0,0},//float origin[3];
  11         {0,0,0},//float angles[3];
  12         0,//int number; // entity number this state is for
  13         0,//int effects;
  14         0,//unsigned short modelindex;
  15         0,//unsigned short frame;
  16         0,//unsigned short tagentity;
  17         {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
  18         0,//unsigned char active; // true if a valid state
  19         0,//unsigned char lightstyle;
  20         0,//unsigned char lightpflags;
  21         0,//unsigned char colormap;
  22         0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
  23         255,//unsigned char alpha;
  24         16,//unsigned char scale;
  25         0,//unsigned char glowsize;
  26         254,//unsigned char glowcolor;
  27         0,//unsigned char flags;
  28         0,//unsigned char internaleffects; // INTEF_FLAG1QW and so on
  29         0,//unsigned char tagindex;
  30         {32, 32, 32},//unsigned char colormod[3];
  31         // padding to a multiple of 8 bytes (to align the double time)
  32         0//unsigned char unused; // !
  33 };
  34
  35 // LordHavoc: I own protocol ranges 96, 97, 3500-3599
  36
  37 struct protocolversioninfo_s
  38 {
  39         int number;
  40         const char *name;
  41 }
  42 protocolversioninfo[] =
  43 {
  44         {0, "UNKNOWN"},
  45         {3504, "DP7"},
  46         {3503, "DP6"},
  47         {3502, "DP5"},
  48         {3501, "DP4"},
  49         {3500, "DP3"},
  50         {97, "DP2"},
  51         {96, "DP1"},
  52         {15, "QUAKEDP"},
  53         {250, "NEHAHRAMOVIE"},
  54         {15, "QUAKE"},
  55         {28, "QW"},
  56         {0, NULL}
  57 };
  58
  59 protocolversion_t Protocol_EnumForName(const char *s)
  60 {
  61         int i;
  62         for (i = 1;protocolversioninfo[i].name;i++)
  63                 if (!strcasecmp(s, protocolversioninfo[i].name))
  64                         return (protocolversion_t)i;
  65         return PROTOCOL_UNKNOWN;
  66 }
  67
  68 const char *Protocol_NameForEnum(protocolversion_t p)
  69 {
  70         return protocolversioninfo[p].name;
  71 }
  72
  73 protocolversion_t Protocol_EnumForNumber(int n)
  74 {
  75         int i;
  76         for (i = 1;protocolversioninfo[i].name;i++)
  77                 if (protocolversioninfo[i].number == n)
  78                         return (protocolversion_t)i;
  79         return PROTOCOL_UNKNOWN;
  80 }
  81
  82 int Protocol_NumberForEnum(protocolversion_t p)
  83 {
  84         return protocolversioninfo[p].number;
  85 }
  86
  87 void Protocol_Names(char *buffer, size_t buffersize)
  88 {
  89         int i;
  90         if (buffersize < 1)
  91                 return;
  92         buffer[0] = 0;
  93         for (i = 1;protocolversioninfo[i].name;i++)
  94         {
  95                 if (i > 1)
  96                         strlcat(buffer, " ", buffersize);
  97                 strlcat(buffer, protocolversioninfo[i].name, buffersize);
  98         }
  99 }
 100
 101 void EntityFrameQuake_ReadEntity(int bits)
 102 {
 103         int num;
 104         entity_t *ent;
 105         entity_state_t s;
 106
 107         if (bits & U_MOREBITS)
 108                 bits |= (MSG_ReadByte()<<8);
 109         if ((bits & U_EXTEND1) && cls.protocol != PROTOCOL_NEHAHRAMOVIE)
 110         {
 111                 bits |= MSG_ReadByte() << 16;
 112                 if (bits & U_EXTEND2)
 113                         bits |= MSG_ReadByte() << 24;
 114         }
 115
 116         if (bits & U_LONGENTITY)
 117                 num = (unsigned short) MSG_ReadShort ();
 118         else
 119                 num = MSG_ReadByte ();
 120
 121         if (num >= MAX_EDICTS)
 122                 Host_Error("EntityFrameQuake_ReadEntity: entity number (%i) >= MAX_EDICTS (%i)", num, MAX_EDICTS);
 123         if (num < 1)
 124                 Host_Error("EntityFrameQuake_ReadEntity: invalid entity number (%i)", num);
 125
 126         if (cl.num_entities <= num)
 127         {
 128                 cl.num_entities = num + 1;
 129                 if (num >= cl.max_entities)
 130                         CL_ExpandEntities(num);
 131         }
 132
 133         ent = cl.entities + num;
 134
 135         // note: this inherits the 'active' state of the baseline chosen
 136         // (state_baseline is always active, state_current may not be active if
 137         // the entity was missing in the last frame)
 138         if (bits & U_DELTA)
 139                 s = ent->state_current;
 140         else
 141         {
 142                 s = ent->state_baseline;
 143                 s.active = true;
 144         }
 145
 146         cl.isquakeentity[num] = true;
 147         if (cl.lastquakeentity < num)
 148                 cl.lastquakeentity = num;
 149         s.number = num;
 150         s.time = cl.mtime[0];
 151         s.flags = 0;
 152         if (bits & U_MODEL)             s.modelindex = (s.modelindex & 0xFF00) | MSG_ReadByte();
 153         if (bits & U_FRAME)             s.frame = (s.frame & 0xFF00) | MSG_ReadByte();
 154         if (bits & U_COLORMAP)  s.colormap = MSG_ReadByte();
 155         if (bits & U_SKIN)              s.skin = MSG_ReadByte();
 156         if (bits & U_EFFECTS)   s.effects = (s.effects & 0xFF00) | MSG_ReadByte();
 157         if (bits & U_ORIGIN1)   s.origin[0] = MSG_ReadCoord(cls.protocol);
 158         if (bits & U_ANGLE1)    s.angles[0] = MSG_ReadAngle(cls.protocol);
 159         if (bits & U_ORIGIN2)   s.origin[1] = MSG_ReadCoord(cls.protocol);
 160         if (bits & U_ANGLE2)    s.angles[1] = MSG_ReadAngle(cls.protocol);
 161         if (bits & U_ORIGIN3)   s.origin[2] = MSG_ReadCoord(cls.protocol);
 162         if (bits & U_ANGLE3)    s.angles[2] = MSG_ReadAngle(cls.protocol);
 163         if (bits & U_STEP)              s.flags |= RENDER_STEP;
 164         if (bits & U_ALPHA)             s.alpha = MSG_ReadByte();
 165         if (bits & U_SCALE)             s.scale = MSG_ReadByte();
 166         if (bits & U_EFFECTS2)  s.effects = (s.effects & 0x00FF) | (MSG_ReadByte() << 8);
 167         if (bits & U_GLOWSIZE)  s.glowsize = MSG_ReadByte();
 168         if (bits & U_GLOWCOLOR) s.glowcolor = MSG_ReadByte();
 169         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));}
 170         if (bits & U_GLOWTRAIL) s.flags |= RENDER_GLOWTRAIL;
 171         if (bits & U_FRAME2)    s.frame = (s.frame & 0x00FF) | (MSG_ReadByte() << 8);
 172         if (bits & U_MODEL2)    s.modelindex = (s.modelindex & 0x00FF) | (MSG_ReadByte() << 8);
 173         if (bits & U_VIEWMODEL) s.flags |= RENDER_VIEWMODEL;
 174         if (bits & U_EXTERIORMODEL)     s.flags |= RENDER_EXTERIORMODEL;
 175
 176         // LordHavoc: to allow playback of the Nehahra movie
 177         if (cls.protocol == PROTOCOL_NEHAHRAMOVIE && (bits & U_EXTEND1))
 178         {
 179                 // LordHavoc: evil format
 180                 int i = (int)MSG_ReadFloat();
 181                 int j = (int)(MSG_ReadFloat() * 255.0f);
 182                 if (i == 2)
 183                 {
 184                         i = (int)MSG_ReadFloat();
 185                         if (i)
 186                                 s.effects |= EF_FULLBRIGHT;
 187                 }
 188                 if (j < 0)
 189                         s.alpha = 0;
 190                 else if (j == 0 || j >= 255)
 191                         s.alpha = 255;
 192                 else
 193                         s.alpha = j;
 194         }
 195
 196         ent->state_previous = ent->state_current;
 197         ent->state_current = s;
 198         if (ent->state_current.active)
 199         {
 200                 CL_MoveLerpEntityStates(ent);
 201                 cl.entities_active[ent->state_current.number] = true;
 202         }
 203
 204         if (msg_badread)
 205                 Host_Error("EntityFrameQuake_ReadEntity: read error");
 206 }
 207
 208 void EntityFrameQuake_ISeeDeadEntities(void)
 209 {
 210         int num, lastentity;
 211         if (cl.lastquakeentity == 0)
 212                 return;
 213         lastentity = cl.lastquakeentity;
 214         cl.lastquakeentity = 0;
 215         for (num = 0;num <= lastentity;num++)
 216         {
 217                 if (cl.isquakeentity[num])
 218                 {
 219                         if (cl.entities_active[num] && cl.entities[num].state_current.time == cl.mtime[0])
 220                         {
 221                                 cl.isquakeentity[num] = true;
 222                                 cl.lastquakeentity = num;
 223                         }
 224                         else
 225                         {
 226                                 cl.isquakeentity[num] = false;
 227                                 cl.entities_active[num] = false;
 228                                 cl.entities[num].state_current = defaultstate;
 229                                 cl.entities[num].state_current.number = num;
 230                         }
 231                 }
 232         }
 233 }
 234
 235 // FIXME FIXME FIXME: at this time the CSQC entity writing does not store
 236 // packet logs and thus if an update is lost it is never repeated, this makes
 237 // csqc entities useless at the moment.
 238
 239 void EntityFrameCSQC_WriteState (sizebuf_t *msg, int number, qboolean doupdate, qboolean *sectionstarted)
 240 {
 241         int version;
 242         prvm_eval_t *val, *val2;
 243         version = 0;
 244         if (doupdate)
 245         {
 246                 if (msg->cursize + !*sectionstarted + 2 + 1 + 2 > msg->maxsize)
 247                         return;
 248                 val2 = PRVM_EDICTFIELDVALUE((&prog->edicts[number]), prog->fieldoffsets.Version);
 249                 version = (int)val2->_float;
 250                 // LordHavoc: do some validity checks on self.Version
 251                 // if self.Version reaches 255, it will soon exceed the byte used to
 252                 // store an entity version in the client struct, so we need to reset
 253                 // all the version to 1 and force all the existing clients' version of
 254                 // it to 255 (which we're not allowing to actually occur)
 255                 if (version < 0)
 256                         val2->_float = 0;
 257                 if (version >= 255)
 258                 {
 259                         int i;
 260                         val2->_float = version = 1;
 261                         // since we just reset the Version field to 1, it may accidentally
 262                         // end up being equal to an existing client version now or in the
 263                         // future, so to fix this situation we have to loop over all
 264                         // clients and change their versions for this entity to be -1
 265                         // which never matches, thus causing them to receive the update
 266                         // soon, as they should
 267                         for (i = 0;i < svs.maxclients;i++)
 268                                 if (svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[number])
 269                                         svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[number] = 255;
 270                 }
 271         }
 272         // if the version already matches, we don't need to do anything as the
 273         // latest version has already been sent.
 274         if (svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[number] == version)
 275                 return;
 276         if (version)
 277         {
 278                 // if there's no SendEntity function, treat it as a remove
 279                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[number]), prog->fieldoffsets.SendEntity);
 280                 if (val->function)
 281                 {
 282                         // there is a function to call, save the cursize value incase we
 283                         // have to do a rollback due to overflow
 284                         int oldcursize = msg->cursize;
 285                         if(!*sectionstarted)
 286                                 MSG_WriteByte(msg, svc_csqcentities);
 287                         MSG_WriteShort(msg, number);
 288                         ((int *)prog->globals.generic)[OFS_PARM0] = sv.writeentitiestoclient_cliententitynumber;
 289                         prog->globals.server->self = number;
 290                         PRVM_ExecuteProgram(val->function, "Null SendEntity\n");
 291                         if(prog->globals.generic[OFS_RETURN])
 292                         {
 293                                 if (msg->cursize + 2 > msg->maxsize)
 294                                 {
 295                                         // if the packet no longer has enough room to write the
 296                                         // final index code that ends the message, rollback to the
 297                                         // state before we tried to write anything and then return
 298                                         msg->cursize = oldcursize;
 299                                         msg->overflowed = false;
 300                                         return;
 301                                 }
 302                                 // an update has been successfully written, update the version
 303                                 svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[number] = version;
 304                                 // and take note that we have begun the svc_csqcentities
 305                                 // section of the packet
 306                                 *sectionstarted = 1;
 307                                 return;
 308                         }
 309                         else
 310                         {
 311                                 // rollback the buffer to its state before the writes
 312                                 msg->cursize = oldcursize;
 313                                 // if the function returned FALSE, simply write a remove
 314                                 // this is done by falling through to the remove code below
 315                                 version = 0;
 316                         }
 317                 }
 318         }
 319         // write a remove message if needed
 320         // if already removed, do nothing
 321         if (!svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[number])
 322                 return;
 323         // if there isn't enough room to write the remove message, just return, as
 324         // it will be handled in a later packet
 325         if (msg->cursize + !*sectionstarted + 2 + 2 > msg->maxsize)
 326                 return;
 327         // first write the message identifier if needed
 328         if(!*sectionstarted)
 329         {
 330                 *sectionstarted = 1;
 331                 MSG_WriteByte(msg, svc_csqcentities);
 332         }
 333         // write the remove message
 334         MSG_WriteShort(msg, (unsigned short)number | 0x8000);
 335         svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[number] = 0;
 336 }
 337
 338 //[515]: we use only one array per-client for SendEntity feature
 339 void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int numstates, const entity_state_t *states)
 340 {
 341         int i, num;
 342         qboolean sectionstarted = false;
 343         const entity_state_t *n;
 344
 345         // if this server progs is not CSQC-aware, return early
 346         if(prog->fieldoffsets.SendEntity < 0 || prog->fieldoffsets.Version < 0)
 347                 return;
 348         // make sure there is enough room to store the svc_csqcentities byte,
 349         // the terminator (0x0000) and at least one entity update
 350         if (msg->cursize + 32 >= msg->maxsize)
 351                 return;
 352
 353         num = 1;
 354         for (i = 0, n = states;i < numstates;i++, n++)
 355         {
 356                 // all entities between the previous entity state and this one are dead
 357                 for (;num < n->number;num++)
 358                         if(svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[num])
 359                                 EntityFrameCSQC_WriteState(msg, num, false, &sectionstarted);
 360                 // update this entity
 361                 EntityFrameCSQC_WriteState(msg, num, true, &sectionstarted);
 362                 // advance to next entity so the next iteration doesn't immediately remove it
 363                 num++;
 364         }
 365         // all remaining entities are dead
 366         for (;num < prog->num_edicts;num++)
 367                 if(svs.clients[sv.writeentitiestoclient_clientnumber].csqcentityversion[num])
 368                         EntityFrameCSQC_WriteState(msg, num, false, &sectionstarted);
 369         if (sectionstarted)
 370         {
 371                 // write index 0 to end the update (0 is never used by real entities)
 372                 MSG_WriteShort(msg, 0);
 373         }
 374 }
 375
 376 void Protocol_UpdateClientStats(const int *stats)
 377 {
 378         int i;
 379         // update the stats array and set deltabits for any changed stats
 380         for (i = 0;i < MAX_CL_STATS;i++)
 381         {
 382                 if (host_client->stats[i] != stats[i])
 383                 {
 384                         host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
 385                         host_client->stats[i] = stats[i];
 386                 }
 387         }
 388 }
 389
 390 void Protocol_WriteStatsReliable(void)
 391 {
 392         int i;
 393         if (!host_client->netconnection)
 394                 return;
 395         // detect changes in stats and write reliable messages
 396         // this only deals with 32 stats because the older protocols which use
 397         // this function can only cope with 32 stats,
 398         // they also do not support svc_updatestatubyte which was introduced in
 399         // DP6 protocol (except for QW)
 400         for (i = 0;i < 32;i++)
 401         {
 402                 // quickly skip zero bytes
 403                 if (!host_client->statsdeltabits[i >> 3])
 404                 {
 405                         i |= 7;
 406                         continue;
 407                 }
 408                 // check if this bit is set
 409                 if (host_client->statsdeltabits[i >> 3] & (1 << (i & 7)))
 410                 {
 411                         host_client->statsdeltabits[i >> 3] -= (1 << (i & 7));
 412                         // send the stat as a byte if possible
 413                         if (sv.protocol == PROTOCOL_QUAKEWORLD)
 414                         {
 415                                 if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
 416                                 {
 417                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestat);
 418                                         MSG_WriteByte(&host_client->netconnection->message, i);
 419                                         MSG_WriteByte(&host_client->netconnection->message, host_client->stats[i]);
 420                                 }
 421                                 else
 422                                 {
 423                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestatlong);
 424                                         MSG_WriteByte(&host_client->netconnection->message, i);
 425                                         MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
 426                                 }
 427                         }
 428                         else
 429                         {
 430                                 // this could make use of svc_updatestatubyte in DP6 and later
 431                                 // protocols but those protocols do not use this function
 432                                 MSG_WriteByte(&host_client->netconnection->message, svc_updatestat);
 433                                 MSG_WriteByte(&host_client->netconnection->message, i);
 434                                 MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
 435                         }
 436                 }
 437         }
 438 }
 439
 440
 441 void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int numstates, const entity_state_t *states)
 442 {
 443         const entity_state_t *s;
 444         entity_state_t baseline;
 445         int i, bits;
 446         sizebuf_t buf;
 447         unsigned char data[128];
 448         prvm_eval_t *val;
 449
 450         // prepare the buffer
 451         memset(&buf, 0, sizeof(buf));
 452         buf.data = data;
 453         buf.maxsize = sizeof(data);
 454
 455         for (i = 0, s = states;i < numstates;i++, s++)
 456         {
 457                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
 458                 if(val && val->function)
 459                         continue;
 460
 461                 // prepare the buffer
 462                 SZ_Clear(&buf);
 463
 464 // send an update
 465                 bits = 0;
 466                 if (s->number >= 256)
 467                         bits |= U_LONGENTITY;
 468                 if (s->flags & RENDER_STEP)
 469                         bits |= U_STEP;
 470                 if (s->flags & RENDER_VIEWMODEL)
 471                         bits |= U_VIEWMODEL;
 472                 if (s->flags & RENDER_GLOWTRAIL)
 473                         bits |= U_GLOWTRAIL;
 474                 if (s->flags & RENDER_EXTERIORMODEL)
 475                         bits |= U_EXTERIORMODEL;
 476
 477                 // LordHavoc: old stuff, but rewritten to have more exact tolerances
 478                 baseline = prog->edicts[s->number].priv.server->baseline;
 479                 if (baseline.origin[0] != s->origin[0])
 480                         bits |= U_ORIGIN1;
 481                 if (baseline.origin[1] != s->origin[1])
 482                         bits |= U_ORIGIN2;
 483                 if (baseline.origin[2] != s->origin[2])
 484                         bits |= U_ORIGIN3;
 485                 if (baseline.angles[0] != s->angles[0])
 486                         bits |= U_ANGLE1;
 487                 if (baseline.angles[1] != s->angles[1])
 488                         bits |= U_ANGLE2;
 489                 if (baseline.angles[2] != s->angles[2])
 490                         bits |= U_ANGLE3;
 491                 if (baseline.colormap != s->colormap)
 492                         bits |= U_COLORMAP;
 493                 if (baseline.skin != s->skin)
 494                         bits |= U_SKIN;
 495                 if (baseline.frame != s->frame)
 496                 {
 497                         bits |= U_FRAME;
 498                         if (s->frame & 0xFF00)
 499                                 bits |= U_FRAME2;
 500                 }
 501                 if (baseline.effects != s->effects)
 502                 {
 503                         bits |= U_EFFECTS;
 504                         if (s->effects & 0xFF00)
 505                                 bits |= U_EFFECTS2;
 506                 }
 507                 if (baseline.modelindex != s->modelindex)
 508                 {
 509                         bits |= U_MODEL;
 510                         if (s->modelindex & 0xFF00)
 511                                 bits |= U_MODEL2;
 512                 }
 513                 if (baseline.alpha != s->alpha)
 514                         bits |= U_ALPHA;
 515                 if (baseline.scale != s->scale)
 516                         bits |= U_SCALE;
 517                 if (baseline.glowsize != s->glowsize)
 518                         bits |= U_GLOWSIZE;
 519                 if (baseline.glowcolor != s->glowcolor)
 520                         bits |= U_GLOWCOLOR;
 521                 if (!VectorCompare(baseline.colormod, s->colormod))
 522                         bits |= U_COLORMOD;
 523
 524                 // if extensions are disabled, clear the relevant update flags
 525                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 526                         bits &= 0x7FFF;
 527                 if (sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 528                         if (s->alpha != 255 || s->effects & EF_FULLBRIGHT)
 529                                 bits |= U_EXTEND1;
 530
 531                 // write the message
 532                 if (bits >= 16777216)
 533                         bits |= U_EXTEND2;
 534                 if (bits >= 65536)
 535                         bits |= U_EXTEND1;
 536                 if (bits >= 256)
 537                         bits |= U_MOREBITS;
 538                 bits |= U_SIGNAL;
 539
 540                 MSG_WriteByte (&buf, bits);
 541                 if (bits & U_MOREBITS)          MSG_WriteByte(&buf, bits>>8);
 542                 if (bits & U_EXTEND1)           MSG_WriteByte(&buf, bits>>16);
 543                 if (bits & U_EXTEND2)           MSG_WriteByte(&buf, bits>>24);
 544                 if (bits & U_LONGENTITY)        MSG_WriteShort(&buf, s->number);
 545                 else                                            MSG_WriteByte(&buf, s->number);
 546
 547                 if (bits & U_MODEL)                     MSG_WriteByte(&buf, s->modelindex);
 548                 if (bits & U_FRAME)                     MSG_WriteByte(&buf, s->frame);
 549                 if (bits & U_COLORMAP)          MSG_WriteByte(&buf, s->colormap);
 550                 if (bits & U_SKIN)                      MSG_WriteByte(&buf, s->skin);
 551                 if (bits & U_EFFECTS)           MSG_WriteByte(&buf, s->effects);
 552                 if (bits & U_ORIGIN1)           MSG_WriteCoord(&buf, s->origin[0], sv.protocol);
 553                 if (bits & U_ANGLE1)            MSG_WriteAngle(&buf, s->angles[0], sv.protocol);
 554                 if (bits & U_ORIGIN2)           MSG_WriteCoord(&buf, s->origin[1], sv.protocol);
 555                 if (bits & U_ANGLE2)            MSG_WriteAngle(&buf, s->angles[1], sv.protocol);
 556                 if (bits & U_ORIGIN3)           MSG_WriteCoord(&buf, s->origin[2], sv.protocol);
 557                 if (bits & U_ANGLE3)            MSG_WriteAngle(&buf, s->angles[2], sv.protocol);
 558                 if (bits & U_ALPHA)                     MSG_WriteByte(&buf, s->alpha);
 559                 if (bits & U_SCALE)                     MSG_WriteByte(&buf, s->scale);
 560                 if (bits & U_EFFECTS2)          MSG_WriteByte(&buf, s->effects >> 8);
 561                 if (bits & U_GLOWSIZE)          MSG_WriteByte(&buf, s->glowsize);
 562                 if (bits & U_GLOWCOLOR)         MSG_WriteByte(&buf, s->glowcolor);
 563                 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);}
 564                 if (bits & U_FRAME2)            MSG_WriteByte(&buf, s->frame >> 8);
 565                 if (bits & U_MODEL2)            MSG_WriteByte(&buf, s->modelindex >> 8);
 566
 567                 // the nasty protocol
 568                 if ((bits & U_EXTEND1) && sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 569                 {
 570                         if (s->effects & EF_FULLBRIGHT)
 571                         {
 572                                 MSG_WriteFloat(&buf, 2); // QSG protocol version
 573                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
 574                                 MSG_WriteFloat(&buf, 1); // fullbright
 575                         }
 576                         else
 577                         {
 578                                 MSG_WriteFloat(&buf, 1); // QSG protocol version
 579                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
 580                         }
 581                 }
 582
 583                 // if the commit is full, we're done this frame
 584                 if (msg->cursize + buf.cursize > msg->maxsize)
 585                 {
 586                         // next frame we will continue where we left off
 587                         break;
 588                 }
 589                 // write the message to the packet
 590                 SZ_Write(msg, buf.data, buf.cursize);
 591         }
 592 }
 593
 594 int EntityState_DeltaBits(const entity_state_t *o, const entity_state_t *n)
 595 {
 596         unsigned int bits;
 597         // if o is not active, delta from default
 598         if (!o->active)
 599                 o = &defaultstate;
 600         bits = 0;
 601         if (fabs(n->origin[0] - o->origin[0]) > (1.0f / 256.0f))
 602                 bits |= E_ORIGIN1;
 603         if (fabs(n->origin[1] - o->origin[1]) > (1.0f / 256.0f))
 604                 bits |= E_ORIGIN2;
 605         if (fabs(n->origin[2] - o->origin[2]) > (1.0f / 256.0f))
 606                 bits |= E_ORIGIN3;
 607         if ((unsigned char) (n->angles[0] * (256.0f / 360.0f)) != (unsigned char) (o->angles[0] * (256.0f / 360.0f)))
 608                 bits |= E_ANGLE1;
 609         if ((unsigned char) (n->angles[1] * (256.0f / 360.0f)) != (unsigned char) (o->angles[1] * (256.0f / 360.0f)))
 610                 bits |= E_ANGLE2;
 611         if ((unsigned char) (n->angles[2] * (256.0f / 360.0f)) != (unsigned char) (o->angles[2] * (256.0f / 360.0f)))
 612                 bits |= E_ANGLE3;
 613         if ((n->modelindex ^ o->modelindex) & 0x00FF)
 614                 bits |= E_MODEL1;
 615         if ((n->modelindex ^ o->modelindex) & 0xFF00)
 616                 bits |= E_MODEL2;
 617         if ((n->frame ^ o->frame) & 0x00FF)
 618                 bits |= E_FRAME1;
 619         if ((n->frame ^ o->frame) & 0xFF00)
 620                 bits |= E_FRAME2;
 621         if ((n->effects ^ o->effects) & 0x00FF)
 622                 bits |= E_EFFECTS1;
 623         if ((n->effects ^ o->effects) & 0xFF00)
 624                 bits |= E_EFFECTS2;
 625         if (n->colormap != o->colormap)
 626                 bits |= E_COLORMAP;
 627         if (n->skin != o->skin)
 628                 bits |= E_SKIN;
 629         if (n->alpha != o->alpha)
 630                 bits |= E_ALPHA;
 631         if (n->scale != o->scale)
 632                 bits |= E_SCALE;
 633         if (n->glowsize != o->glowsize)
 634                 bits |= E_GLOWSIZE;
 635         if (n->glowcolor != o->glowcolor)
 636                 bits |= E_GLOWCOLOR;
 637         if (n->flags != o->flags)
 638                 bits |= E_FLAGS;
 639         if (n->tagindex != o->tagindex || n->tagentity != o->tagentity)
 640                 bits |= E_TAGATTACHMENT;
 641         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])
 642                 bits |= E_LIGHT;
 643         if (n->lightstyle != o->lightstyle)
 644                 bits |= E_LIGHTSTYLE;
 645         if (n->lightpflags != o->lightpflags)
 646                 bits |= E_LIGHTPFLAGS;
 647
 648         if (bits)
 649         {
 650                 if (bits &  0xFF000000)
 651                         bits |= 0x00800000;
 652                 if (bits &  0x00FF0000)
 653                         bits |= 0x00008000;
 654                 if (bits &  0x0000FF00)
 655                         bits |= 0x00000080;
 656         }
 657         return bits;
 658 }
 659
 660 void EntityState_WriteExtendBits(sizebuf_t *msg, unsigned int bits)
 661 {
 662         MSG_WriteByte(msg, bits & 0xFF);
 663         if (bits & 0x00000080)
 664         {
 665                 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
 666                 if (bits & 0x00008000)
 667                 {
 668                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
 669                         if (bits & 0x00800000)
 670                                 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
 671                 }
 672         }
 673 }
 674
 675 void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned int bits)
 676 {
 677         if (sv.protocol == PROTOCOL_DARKPLACES2)
 678         {
 679                 if (bits & E_ORIGIN1)
 680                         MSG_WriteCoord16i(msg, ent->origin[0]);
 681                 if (bits & E_ORIGIN2)
 682                         MSG_WriteCoord16i(msg, ent->origin[1]);
 683                 if (bits & E_ORIGIN3)
 684                         MSG_WriteCoord16i(msg, ent->origin[2]);
 685         }
 686         else
 687         {
 688                 // LordHavoc: have to write flags first, as they can modify protocol
 689                 if (bits & E_FLAGS)
 690                         MSG_WriteByte(msg, ent->flags);
 691                 if (ent->flags & RENDER_LOWPRECISION)
 692                 {
 693                         if (bits & E_ORIGIN1)
 694                                 MSG_WriteCoord16i(msg, ent->origin[0]);
 695                         if (bits & E_ORIGIN2)
 696                                 MSG_WriteCoord16i(msg, ent->origin[1]);
 697                         if (bits & E_ORIGIN3)
 698                                 MSG_WriteCoord16i(msg, ent->origin[2]);
 699                 }
 700                 else
 701                 {
 702                         if (bits & E_ORIGIN1)
 703                                 MSG_WriteCoord32f(msg, ent->origin[0]);
 704                         if (bits & E_ORIGIN2)
 705                                 MSG_WriteCoord32f(msg, ent->origin[1]);
 706                         if (bits & E_ORIGIN3)
 707                                 MSG_WriteCoord32f(msg, ent->origin[2]);
 708                 }
 709         }
 710         if ((sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4) && (ent->flags & RENDER_LOWPRECISION))
 711         {
 712                 if (bits & E_ANGLE1)
 713                         MSG_WriteAngle8i(msg, ent->angles[0]);
 714                 if (bits & E_ANGLE2)
 715                         MSG_WriteAngle8i(msg, ent->angles[1]);
 716                 if (bits & E_ANGLE3)
 717                         MSG_WriteAngle8i(msg, ent->angles[2]);
 718         }
 719         else
 720         {
 721                 if (bits & E_ANGLE1)
 722                         MSG_WriteAngle16i(msg, ent->angles[0]);
 723                 if (bits & E_ANGLE2)
 724                         MSG_WriteAngle16i(msg, ent->angles[1]);
 725                 if (bits & E_ANGLE3)
 726                         MSG_WriteAngle16i(msg, ent->angles[2]);
 727         }
 728         if (bits & E_MODEL1)
 729                 MSG_WriteByte(msg, ent->modelindex & 0xFF);
 730         if (bits & E_MODEL2)
 731                 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
 732         if (bits & E_FRAME1)
 733                 MSG_WriteByte(msg, ent->frame & 0xFF);
 734         if (bits & E_FRAME2)
 735                 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
 736         if (bits & E_EFFECTS1)
 737                 MSG_WriteByte(msg, ent->effects & 0xFF);
 738         if (bits & E_EFFECTS2)
 739                 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
 740         if (bits & E_COLORMAP)
 741                 MSG_WriteByte(msg, ent->colormap);
 742         if (bits & E_SKIN)
 743                 MSG_WriteByte(msg, ent->skin);
 744         if (bits & E_ALPHA)
 745                 MSG_WriteByte(msg, ent->alpha);
 746         if (bits & E_SCALE)
 747                 MSG_WriteByte(msg, ent->scale);
 748         if (bits & E_GLOWSIZE)
 749                 MSG_WriteByte(msg, ent->glowsize);
 750         if (bits & E_GLOWCOLOR)
 751                 MSG_WriteByte(msg, ent->glowcolor);
 752         if (sv.protocol == PROTOCOL_DARKPLACES2)
 753                 if (bits & E_FLAGS)
 754                         MSG_WriteByte(msg, ent->flags);
 755         if (bits & E_TAGATTACHMENT)
 756         {
 757                 MSG_WriteShort(msg, ent->tagentity);
 758                 MSG_WriteByte(msg, ent->tagindex);
 759         }
 760         if (bits & E_LIGHT)
 761         {
 762                 MSG_WriteShort(msg, ent->light[0]);
 763                 MSG_WriteShort(msg, ent->light[1]);
 764                 MSG_WriteShort(msg, ent->light[2]);
 765                 MSG_WriteShort(msg, ent->light[3]);
 766         }
 767         if (bits & E_LIGHTSTYLE)
 768                 MSG_WriteByte(msg, ent->lightstyle);
 769         if (bits & E_LIGHTPFLAGS)
 770                 MSG_WriteByte(msg, ent->lightpflags);
 771 }
 772
 773 void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
 774 {
 775         unsigned int bits;
 776         if (ent->active)
 777         {
 778                 // entity is active, check for changes from the delta
 779                 if ((bits = EntityState_DeltaBits(delta, ent)))
 780                 {
 781                         // write the update number, bits, and fields
 782                         MSG_WriteShort(msg, ent->number);
 783                         EntityState_WriteExtendBits(msg, bits);
 784                         EntityState_WriteFields(ent, msg, bits);
 785                 }
 786         }
 787         else
 788         {
 789                 // entity is inactive, check if the delta was active
 790                 if (delta->active)
 791                 {
 792                         // write the remove number
 793                         MSG_WriteShort(msg, ent->number | 0x8000);
 794                 }
 795         }
 796 }
 797
 798 int EntityState_ReadExtendBits(void)
 799 {
 800         unsigned int bits;
 801         bits = MSG_ReadByte();
 802         if (bits & 0x00000080)
 803         {
 804                 bits |= MSG_ReadByte() << 8;
 805                 if (bits & 0x00008000)
 806                 {
 807                         bits |= MSG_ReadByte() << 16;
 808                         if (bits & 0x00800000)
 809                                 bits |= MSG_ReadByte() << 24;
 810                 }
 811         }
 812         return bits;
 813 }
 814
 815 void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
 816 {
 817         if (cls.protocol == PROTOCOL_DARKPLACES2)
 818         {
 819                 if (bits & E_ORIGIN1)
 820                         e->origin[0] = MSG_ReadCoord16i();
 821                 if (bits & E_ORIGIN2)
 822                         e->origin[1] = MSG_ReadCoord16i();
 823                 if (bits & E_ORIGIN3)
 824                         e->origin[2] = MSG_ReadCoord16i();
 825         }
 826         else
 827         {
 828                 if (bits & E_FLAGS)
 829                         e->flags = MSG_ReadByte();
 830                 if (e->flags & RENDER_LOWPRECISION)
 831                 {
 832                         if (bits & E_ORIGIN1)
 833                                 e->origin[0] = MSG_ReadCoord16i();
 834                         if (bits & E_ORIGIN2)
 835                                 e->origin[1] = MSG_ReadCoord16i();
 836                         if (bits & E_ORIGIN3)
 837                                 e->origin[2] = MSG_ReadCoord16i();
 838                 }
 839                 else
 840                 {
 841                         if (bits & E_ORIGIN1)
 842                                 e->origin[0] = MSG_ReadCoord32f();
 843                         if (bits & E_ORIGIN2)
 844                                 e->origin[1] = MSG_ReadCoord32f();
 845                         if (bits & E_ORIGIN3)
 846                                 e->origin[2] = MSG_ReadCoord32f();
 847                 }
 848         }
 849         if ((cls.protocol == PROTOCOL_DARKPLACES5 || cls.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
 850         {
 851                 if (bits & E_ANGLE1)
 852                         e->angles[0] = MSG_ReadAngle16i();
 853                 if (bits & E_ANGLE2)
 854                         e->angles[1] = MSG_ReadAngle16i();
 855                 if (bits & E_ANGLE3)
 856                         e->angles[2] = MSG_ReadAngle16i();
 857         }
 858         else
 859         {
 860                 if (bits & E_ANGLE1)
 861                         e->angles[0] = MSG_ReadAngle8i();
 862                 if (bits & E_ANGLE2)
 863                         e->angles[1] = MSG_ReadAngle8i();
 864                 if (bits & E_ANGLE3)
 865                         e->angles[2] = MSG_ReadAngle8i();
 866         }
 867         if (bits & E_MODEL1)
 868                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
 869         if (bits & E_MODEL2)
 870                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 871         if (bits & E_FRAME1)
 872                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
 873         if (bits & E_FRAME2)
 874                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 875         if (bits & E_EFFECTS1)
 876                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
 877         if (bits & E_EFFECTS2)
 878                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 879         if (bits & E_COLORMAP)
 880                 e->colormap = MSG_ReadByte();
 881         if (bits & E_SKIN)
 882                 e->skin = MSG_ReadByte();
 883         if (bits & E_ALPHA)
 884                 e->alpha = MSG_ReadByte();
 885         if (bits & E_SCALE)
 886                 e->scale = MSG_ReadByte();
 887         if (bits & E_GLOWSIZE)
 888                 e->glowsize = MSG_ReadByte();
 889         if (bits & E_GLOWCOLOR)
 890                 e->glowcolor = MSG_ReadByte();
 891         if (cls.protocol == PROTOCOL_DARKPLACES2)
 892                 if (bits & E_FLAGS)
 893                         e->flags = MSG_ReadByte();
 894         if (bits & E_TAGATTACHMENT)
 895         {
 896                 e->tagentity = (unsigned short) MSG_ReadShort();
 897                 e->tagindex = MSG_ReadByte();
 898         }
 899         if (bits & E_LIGHT)
 900         {
 901                 e->light[0] = (unsigned short) MSG_ReadShort();
 902                 e->light[1] = (unsigned short) MSG_ReadShort();
 903                 e->light[2] = (unsigned short) MSG_ReadShort();
 904                 e->light[3] = (unsigned short) MSG_ReadShort();
 905         }
 906         if (bits & E_LIGHTSTYLE)
 907                 e->lightstyle = MSG_ReadByte();
 908         if (bits & E_LIGHTPFLAGS)
 909                 e->lightpflags = MSG_ReadByte();
 910
 911         if (developer_networkentities.integer >= 2)
 912         {
 913                 Con_Printf("ReadFields e%i", e->number);
 914
 915                 if (bits & E_ORIGIN1)
 916                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
 917                 if (bits & E_ORIGIN2)
 918                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
 919                 if (bits & E_ORIGIN3)
 920                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
 921                 if (bits & E_ANGLE1)
 922                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
 923                 if (bits & E_ANGLE2)
 924                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
 925                 if (bits & E_ANGLE3)
 926                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
 927                 if (bits & (E_MODEL1 | E_MODEL2))
 928                         Con_Printf(" E_MODEL %i", e->modelindex);
 929
 930                 if (bits & (E_FRAME1 | E_FRAME2))
 931                         Con_Printf(" E_FRAME %i", e->frame);
 932                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
 933                         Con_Printf(" E_EFFECTS %i", e->effects);
 934                 if (bits & E_ALPHA)
 935                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
 936                 if (bits & E_SCALE)
 937                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
 938                 if (bits & E_COLORMAP)
 939                         Con_Printf(" E_COLORMAP %i", e->colormap);
 940                 if (bits & E_SKIN)
 941                         Con_Printf(" E_SKIN %i", e->skin);
 942
 943                 if (bits & E_GLOWSIZE)
 944                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
 945                 if (bits & E_GLOWCOLOR)
 946                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
 947
 948                 if (bits & E_LIGHT)
 949                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
 950                 if (bits & E_LIGHTPFLAGS)
 951                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
 952
 953                 if (bits & E_TAGATTACHMENT)
 954                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
 955                 if (bits & E_LIGHTSTYLE)
 956                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
 957                 Con_Print("\n");
 958         }
 959 }
 960
 961 // (client and server) allocates a new empty database
 962 entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
 963 {
 964         return (entityframe_database_t *)Mem_Alloc(mempool, sizeof(entityframe_database_t));
 965 }
 966
 967 // (client and server) frees the database
 968 void EntityFrame_FreeDatabase(entityframe_database_t *d)
 969 {
 970         Mem_Free(d);
 971 }
 972
 973 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
 974 void EntityFrame_ClearDatabase(entityframe_database_t *d)
 975 {
 976         memset(d, 0, sizeof(*d));
 977 }
 978
 979 // (server and client) removes frames older than 'frame' from database
 980 void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
 981 {
 982         int i;
 983         d->ackframenum = frame;
 984         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
 985         // ignore outdated frame acks (out of order packets)
 986         if (i == 0)
 987                 return;
 988         d->numframes -= i;
 989         // if some queue is left, slide it down to beginning of array
 990         if (d->numframes)
 991                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
 992 }
 993
 994 // (server) clears frame, to prepare for adding entities
 995 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
 996 {
 997         f->time = 0;
 998         f->framenum = framenum;
 999         f->numentities = 0;
1000         if (eye == NULL)
1001                 VectorClear(f->eye);
1002         else
1003                 VectorCopy(eye, f->eye);
1004 }
1005
1006 // (server and client) reads a frame from the database
1007 void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
1008 {
1009         int i, n;
1010         EntityFrame_Clear(f, NULL, -1);
1011         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
1012         if (i < d->numframes && framenum == d->frames[i].framenum)
1013         {
1014                 f->framenum = framenum;
1015                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
1016                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
1017                 if (n > f->numentities)
1018                         n = f->numentities;
1019                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
1020                 if (f->numentities > n)
1021                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
1022                 VectorCopy(d->eye, f->eye);
1023         }
1024 }
1025
1026 // (server and client) adds a entity_frame to the database, for future reference
1027 void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
1028 {
1029         int n, e;
1030         entity_frameinfo_t *info;
1031
1032         VectorCopy(eye, d->eye);
1033
1034         // figure out how many entity slots are used already
1035         if (d->numframes)
1036         {
1037                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
1038                 if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
1039                 {
1040                         // ran out of room, dump database
1041                         EntityFrame_ClearDatabase(d);
1042                 }
1043         }
1044
1045         info = &d->frames[d->numframes];
1046         info->framenum = framenum;
1047         e = -1000;
1048         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
1049         for (n = 0;n <= d->numframes;n++)
1050         {
1051                 if (e >= d->frames[n].framenum)
1052                 {
1053                         if (e == framenum)
1054                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
1055                         else
1056                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
1057                         return;
1058                 }
1059                 e = d->frames[n].framenum;
1060         }
1061         // if database still has frames after that...
1062         if (d->numframes)
1063                 info->firstentity = d->frames[d->numframes - 1].endentity;
1064         else
1065                 info->firstentity = 0;
1066         info->endentity = info->firstentity + numentities;
1067         d->numframes++;
1068
1069         n = info->firstentity % MAX_ENTITY_DATABASE;
1070         e = MAX_ENTITY_DATABASE - n;
1071         if (e > numentities)
1072                 e = numentities;
1073         memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
1074         if (numentities > e)
1075                 memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
1076 }
1077
1078 // (server) writes a frame to network stream
1079 void EntityFrame_WriteFrame(sizebuf_t *msg, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
1080 {
1081         int i, onum, number;
1082         entity_frame_t *o = &d->deltaframe;
1083         const entity_state_t *ent, *delta;
1084         vec3_t eye;
1085         prvm_eval_t *val;
1086
1087         d->latestframenum++;
1088
1089         VectorClear(eye);
1090         for (i = 0;i < numstates;i++)
1091         {
1092                 if (states[i].number == viewentnum)
1093                 {
1094                         VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
1095                         break;
1096                 }
1097         }
1098
1099         EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
1100
1101         EntityFrame_FetchFrame(d, d->ackframenum, o);
1102
1103         MSG_WriteByte (msg, svc_entities);
1104         MSG_WriteLong (msg, o->framenum);
1105         MSG_WriteLong (msg, d->latestframenum);
1106         MSG_WriteFloat (msg, eye[0]);
1107         MSG_WriteFloat (msg, eye[1]);
1108         MSG_WriteFloat (msg, eye[2]);
1109
1110         onum = 0;
1111         for (i = 0;i < numstates;i++)
1112         {
1113                 ent = states + i;
1114                 number = ent->number;
1115
1116                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[number]), prog->fieldoffsets.SendEntity);
1117                 if(val && val->function)
1118                                 continue;
1119                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
1120                 {
1121                         // write remove message
1122                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1123                 }
1124                 if (onum < o->numentities && (o->entitydata[onum].number == number))
1125                 {
1126                         // delta from previous frame
1127                         delta = o->entitydata + onum;
1128                         // advance to next entity in delta frame
1129                         onum++;
1130                 }
1131                 else
1132                 {
1133                         // delta from defaults
1134                         delta = &defaultstate;
1135                 }
1136                 EntityState_WriteUpdate(ent, msg, delta);
1137         }
1138         for (;onum < o->numentities;onum++)
1139         {
1140                 // write remove message
1141                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1142         }
1143         MSG_WriteShort(msg, 0xFFFF);
1144 }
1145
1146 // (client) reads a frame from network stream
1147 void EntityFrame_CL_ReadFrame(void)
1148 {
1149         int i, number, removed;
1150         entity_frame_t *f, *delta;
1151         entity_state_t *e, *old, *oldend;
1152         entity_t *ent;
1153         entityframe_database_t *d;
1154         if (!cl.entitydatabase)
1155                 cl.entitydatabase = EntityFrame_AllocDatabase(cls.levelmempool);
1156         d = cl.entitydatabase;
1157         f = &d->framedata;
1158         delta = &d->deltaframe;
1159
1160         EntityFrame_Clear(f, NULL, -1);
1161
1162         // read the frame header info
1163         f->time = cl.mtime[0];
1164         number = MSG_ReadLong();
1165         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1166                 cl.latestframenums[i] = cl.latestframenums[i+1];
1167         cl.latestframenums[LATESTFRAMENUMS-1] = f->framenum = MSG_ReadLong();
1168         f->eye[0] = MSG_ReadFloat();
1169         f->eye[1] = MSG_ReadFloat();
1170         f->eye[2] = MSG_ReadFloat();
1171         EntityFrame_AckFrame(d, number);
1172         EntityFrame_FetchFrame(d, number, delta);
1173         old = delta->entitydata;
1174         oldend = old + delta->numentities;
1175         // read entities until we hit the magic 0xFFFF end tag
1176         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
1177         {
1178                 if (msg_badread)
1179                         Host_Error("EntityFrame_Read: read error");
1180                 removed = number & 0x8000;
1181                 number &= 0x7FFF;
1182                 if (number >= MAX_EDICTS)
1183                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)", number, MAX_EDICTS);
1184
1185                 // seek to entity, while copying any skipped entities (assume unchanged)
1186                 while (old < oldend && old->number < number)
1187                 {
1188                         if (f->numentities >= MAX_ENTITY_DATABASE)
1189                                 Host_Error("EntityFrame_Read: entity list too big");
1190                         f->entitydata[f->numentities] = *old++;
1191                         f->entitydata[f->numentities++].time = cl.mtime[0];
1192                 }
1193                 if (removed)
1194                 {
1195                         if (old < oldend && old->number == number)
1196                                 old++;
1197                         else
1198                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
1199                 }
1200                 else
1201                 {
1202                         if (f->numentities >= MAX_ENTITY_DATABASE)
1203                                 Host_Error("EntityFrame_Read: entity list too big");
1204
1205                         // reserve this slot
1206                         e = f->entitydata + f->numentities++;
1207
1208                         if (old < oldend && old->number == number)
1209                         {
1210                                 // delta from old entity
1211                                 *e = *old++;
1212                         }
1213                         else
1214                         {
1215                                 // delta from defaults
1216                                 *e = defaultstate;
1217                         }
1218
1219                         if (cl.num_entities <= number)
1220                         {
1221                                 cl.num_entities = number + 1;
1222                                 if (number >= cl.max_entities)
1223                                         CL_ExpandEntities(number);
1224                         }
1225                         cl.entities_active[number] = true;
1226                         e->active = true;
1227                         e->time = cl.mtime[0];
1228                         e->number = number;
1229                         EntityState_ReadFields(e, EntityState_ReadExtendBits());
1230                 }
1231         }
1232         while (old < oldend)
1233         {
1234                 if (f->numentities >= MAX_ENTITY_DATABASE)
1235                         Host_Error("EntityFrame_Read: entity list too big");
1236                 f->entitydata[f->numentities] = *old++;
1237                 f->entitydata[f->numentities++].time = cl.mtime[0];
1238         }
1239         EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
1240
1241         memset(cl.entities_active, 0, cl.num_entities * sizeof(unsigned char));
1242         number = 1;
1243         for (i = 0;i < f->numentities;i++)
1244         {
1245                 for (;number < f->entitydata[i].number && number < cl.num_entities;number++)
1246                 {
1247                         if (cl.entities_active[number])
1248                         {
1249                                 cl.entities_active[number] = false;
1250                                 cl.entities[number].state_current.active = false;
1251                         }
1252                 }
1253                 if (number >= cl.num_entities)
1254                         break;
1255                 // update the entity
1256                 ent = &cl.entities[number];
1257                 ent->state_previous = ent->state_current;
1258                 ent->state_current = f->entitydata[i];
1259                 CL_MoveLerpEntityStates(ent);
1260                 // the entity lives again...
1261                 cl.entities_active[number] = true;
1262                 number++;
1263         }
1264         for (;number < cl.num_entities;number++)
1265         {
1266                 if (cl.entities_active[number])
1267                 {
1268                         cl.entities_active[number] = false;
1269                         cl.entities[number].state_current.active = false;
1270                 }
1271         }
1272 }
1273
1274
1275 // (client) returns the frame number of the most recent frame recieved
1276 int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
1277 {
1278         if (d->numframes)
1279                 return d->frames[d->numframes - 1].framenum;
1280         else
1281                 return -1;
1282 }
1283
1284
1285
1286
1287
1288
1289 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
1290 {
1291         if (d->maxreferenceentities <= number)
1292         {
1293                 int oldmax = d->maxreferenceentities;
1294                 entity_state_t *oldentity = d->referenceentity;
1295                 d->maxreferenceentities = (number + 15) & ~7;
1296                 d->referenceentity = (entity_state_t *)Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
1297                 if (oldentity)
1298                 {
1299                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
1300                         Mem_Free(oldentity);
1301                 }
1302                 // clear the newly created entities
1303                 for (;oldmax < d->maxreferenceentities;oldmax++)
1304                 {
1305                         d->referenceentity[oldmax] = defaultstate;
1306                         d->referenceentity[oldmax].number = oldmax;
1307                 }
1308         }
1309         return d->referenceentity + number;
1310 }
1311
1312 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
1313 {
1314         // resize commit's entity list if full
1315         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
1316         {
1317                 entity_state_t *oldentity = d->currentcommit->entity;
1318                 d->currentcommit->maxentities += 8;
1319                 d->currentcommit->entity = (entity_state_t *)Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
1320                 if (oldentity)
1321                 {
1322                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
1323                         Mem_Free(oldentity);
1324                 }
1325         }
1326         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
1327 }
1328
1329 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
1330 {
1331         entityframe4_database_t *d;
1332         d = (entityframe4_database_t *)Mem_Alloc(pool, sizeof(*d));
1333         d->mempool = pool;
1334         EntityFrame4_ResetDatabase(d);
1335         return d;
1336 }
1337
1338 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
1339 {
1340         int i;
1341         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1342                 if (d->commit[i].entity)
1343                         Mem_Free(d->commit[i].entity);
1344         if (d->referenceentity)
1345                 Mem_Free(d->referenceentity);
1346         Mem_Free(d);
1347 }
1348
1349 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
1350 {
1351         int i;
1352         d->referenceframenum = -1;
1353         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1354                 d->commit[i].numentities = 0;
1355         for (i = 0;i < d->maxreferenceentities;i++)
1356                 d->referenceentity[i] = defaultstate;
1357 }
1358
1359 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
1360 {
1361         int i, j, found;
1362         entity_database4_commit_t *commit;
1363         if (framenum == -1)
1364         {
1365                 // reset reference, but leave commits alone
1366                 d->referenceframenum = -1;
1367                 for (i = 0;i < d->maxreferenceentities;i++)
1368                         d->referenceentity[i] = defaultstate;
1369                 // if this is the server, remove commits
1370                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1371                                 commit->numentities = 0;
1372                 found = true;
1373         }
1374         else if (d->referenceframenum == framenum)
1375                 found = true;
1376         else
1377         {
1378                 found = false;
1379                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1380                 {
1381                         if (commit->numentities && commit->framenum <= framenum)
1382                         {
1383                                 if (commit->framenum == framenum)
1384                                 {
1385                                         found = true;
1386                                         d->referenceframenum = framenum;
1387                                         if (developer_networkentities.integer >= 3)
1388                                         {
1389                                                 for (j = 0;j < commit->numentities;j++)
1390                                                 {
1391                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
1392                                                         if (commit->entity[j].active != s->active)
1393                                                         {
1394                                                                 if (commit->entity[j].active)
1395                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1396                                                                 else
1397                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1398                                                         }
1399                                                         *s = commit->entity[j];
1400                                                 }
1401                                         }
1402                                         else
1403                                                 for (j = 0;j < commit->numentities;j++)
1404                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
1405                                 }
1406                                 commit->numentities = 0;
1407                         }
1408                 }
1409         }
1410         if (developer_networkentities.integer >= 1)
1411         {
1412                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
1413                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1414                         if (d->commit[i].numentities)
1415                                 Con_Printf(" %i", d->commit[i].framenum);
1416                 Con_Print("\n");
1417         }
1418         return found;
1419 }
1420
1421 void EntityFrame4_CL_ReadFrame(void)
1422 {
1423         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
1424         entity_state_t *s;
1425         entityframe4_database_t *d;
1426         if (!cl.entitydatabase4)
1427                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cls.levelmempool);
1428         d = cl.entitydatabase4;
1429         // read the number of the frame this refers to
1430         referenceframenum = MSG_ReadLong();
1431         // read the number of this frame
1432         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1433                 cl.latestframenums[i] = cl.latestframenums[i+1];
1434         cl.latestframenums[LATESTFRAMENUMS-1] = framenum = MSG_ReadLong();
1435         // read the start number
1436         enumber = (unsigned short) MSG_ReadShort();
1437         if (developer_networkentities.integer >= 10)
1438         {
1439                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
1440                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1441                         if (d->commit[i].numentities)
1442                                 Con_Printf(" %i", d->commit[i].framenum);
1443                 Con_Print("\n");
1444         }
1445         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
1446         {
1447                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
1448                 skip = true;
1449         }
1450         d->currentcommit = NULL;
1451         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1452         {
1453                 if (!d->commit[i].numentities)
1454                 {
1455                         d->currentcommit = d->commit + i;
1456                         d->currentcommit->framenum = framenum;
1457                         d->currentcommit->numentities = 0;
1458                 }
1459         }
1460         if (d->currentcommit == NULL)
1461         {
1462                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
1463                 skip = true;
1464         }
1465         done = false;
1466         while (!done && !msg_badread)
1467         {
1468                 // read the number of the modified entity
1469                 // (gaps will be copied unmodified)
1470                 n = (unsigned short)MSG_ReadShort();
1471                 if (n == 0x8000)
1472                 {
1473                         // no more entities in this update, but we still need to copy the
1474                         // rest of the reference entities (final gap)
1475                         done = true;
1476                         // read end of range number, then process normally
1477                         n = (unsigned short)MSG_ReadShort();
1478                 }
1479                 // high bit means it's a remove message
1480                 cnumber = n & 0x7FFF;
1481                 // if this is a live entity we may need to expand the array
1482                 if (cl.num_entities <= cnumber && !(n & 0x8000))
1483                 {
1484                         cl.num_entities = cnumber + 1;
1485                         if (cnumber >= cl.max_entities)
1486                                 CL_ExpandEntities(cnumber);
1487                 }
1488                 // add one (the changed one) if not done
1489                 stopnumber = cnumber + !done;
1490                 // process entities in range from the last one to the changed one
1491                 for (;enumber < stopnumber;enumber++)
1492                 {
1493                         if (skip || enumber >= cl.num_entities)
1494                         {
1495                                 if (enumber == cnumber && (n & 0x8000) == 0)
1496                                 {
1497                                         entity_state_t tempstate;
1498                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
1499                                 }
1500                                 continue;
1501                         }
1502                         // slide the current into the previous slot
1503                         cl.entities[enumber].state_previous = cl.entities[enumber].state_current;
1504                         // copy a new current from reference database
1505                         cl.entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
1506                         s = &cl.entities[enumber].state_current;
1507                         // if this is the one to modify, read more data...
1508                         if (enumber == cnumber)
1509                         {
1510                                 if (n & 0x8000)
1511                                 {
1512                                         // simply removed
1513                                         if (developer_networkentities.integer >= 2)
1514                                                 Con_Printf("entity %i: remove\n", enumber);
1515                                         *s = defaultstate;
1516                                 }
1517                                 else
1518                                 {
1519                                         // read the changes
1520                                         if (developer_networkentities.integer >= 2)
1521                                                 Con_Printf("entity %i: update\n", enumber);
1522                                         s->active = true;
1523                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
1524                                 }
1525                         }
1526                         else if (developer_networkentities.integer >= 4)
1527                                 Con_Printf("entity %i: copy\n", enumber);
1528                         // set the cl.entities_active flag
1529                         cl.entities_active[enumber] = s->active;
1530                         // set the update time
1531                         s->time = cl.mtime[0];
1532                         // fix the number (it gets wiped occasionally by copying from defaultstate)
1533                         s->number = enumber;
1534                         // check if we need to update the lerp stuff
1535                         if (s->active)
1536                                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
1537                         // add this to the commit entry whether it is modified or not
1538                         if (d->currentcommit)
1539                                 EntityFrame4_AddCommitEntity(d, &cl.entities[enumber].state_current);
1540                         // print extra messages if desired
1541                         if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
1542                         {
1543                                 if (cl.entities[enumber].state_current.active)
1544                                         Con_Printf("entity #%i has become active\n", enumber);
1545                                 else if (cl.entities[enumber].state_previous.active)
1546                                         Con_Printf("entity #%i has become inactive\n", enumber);
1547                         }
1548                 }
1549         }
1550         d->currentcommit = NULL;
1551         if (skip)
1552                 EntityFrame4_ResetDatabase(d);
1553 }
1554
1555 void EntityFrame4_WriteFrame(sizebuf_t *msg, entityframe4_database_t *d, int numstates, const entity_state_t *states)
1556 {
1557         const entity_state_t *e, *s;
1558         entity_state_t inactiveentitystate;
1559         int i, n, startnumber;
1560         sizebuf_t buf;
1561         unsigned char data[128];
1562         prvm_eval_t *val;
1563
1564         // if there isn't enough space to accomplish anything, skip it
1565         if (msg->cursize + 24 > msg->maxsize)
1566                 return;
1567
1568         // prepare the buffer
1569         memset(&buf, 0, sizeof(buf));
1570         buf.data = data;
1571         buf.maxsize = sizeof(data);
1572
1573         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1574                 if (!d->commit[i].numentities)
1575                         break;
1576         // if commit buffer full, just don't bother writing an update this frame
1577         if (i == MAX_ENTITY_HISTORY)
1578                 return;
1579         d->currentcommit = d->commit + i;
1580
1581         // this state's number gets played around with later
1582         inactiveentitystate = defaultstate;
1583
1584         d->currentcommit->numentities = 0;
1585         d->currentcommit->framenum = ++d->latestframenumber;
1586         MSG_WriteByte(msg, svc_entities);
1587         MSG_WriteLong(msg, d->referenceframenum);
1588         MSG_WriteLong(msg, d->currentcommit->framenum);
1589         if (developer_networkentities.integer >= 10)
1590         {
1591                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
1592                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1593                         if (d->commit[i].numentities)
1594                                 Con_Printf(" %i", d->commit[i].framenum);
1595                 Con_Print(")\n");
1596         }
1597         if (d->currententitynumber >= prog->max_edicts)
1598                 startnumber = 1;
1599         else
1600                 startnumber = bound(1, d->currententitynumber, prog->max_edicts - 1);
1601         MSG_WriteShort(msg, startnumber);
1602         // reset currententitynumber so if the loop does not break it we will
1603         // start at beginning next frame (if it does break, it will set it)
1604         d->currententitynumber = 1;
1605         for (i = 0, n = startnumber;n < prog->max_edicts;n++)
1606         {
1607                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[n]), prog->fieldoffsets.SendEntity);
1608                 if(val && val->function)
1609                         continue;
1610                 // find the old state to delta from
1611                 e = EntityFrame4_GetReferenceEntity(d, n);
1612                 // prepare the buffer
1613                 SZ_Clear(&buf);
1614                 // entity exists, build an update (if empty there is no change)
1615                 // find the state in the list
1616                 for (;i < numstates && states[i].number < n;i++);
1617                 // make the message
1618                 s = states + i;
1619                 if (s->number == n)
1620                 {
1621                         // build the update
1622                         EntityState_WriteUpdate(s, &buf, e);
1623                 }
1624                 else
1625                 {
1626                         inactiveentitystate.number = n;
1627                         s = &inactiveentitystate;
1628                         if (e->active)
1629                         {
1630                                 // entity used to exist but doesn't anymore, send remove
1631                                 MSG_WriteShort(&buf, n | 0x8000);
1632                         }
1633                 }
1634                 // if the commit is full, we're done this frame
1635                 if (msg->cursize + buf.cursize > msg->maxsize - 4)
1636                 {
1637                         // next frame we will continue where we left off
1638                         break;
1639                 }
1640                 // add the entity to the commit
1641                 EntityFrame4_AddCommitEntity(d, s);
1642                 // if the message is empty, skip out now
1643                 if (buf.cursize)
1644                 {
1645                         // write the message to the packet
1646                         SZ_Write(msg, buf.data, buf.cursize);
1647                 }
1648         }
1649         d->currententitynumber = n;
1650
1651         // remove world message (invalid, and thus a good terminator)
1652         MSG_WriteShort(msg, 0x8000);
1653         // write the number of the end entity
1654         MSG_WriteShort(msg, d->currententitynumber);
1655         // just to be sure
1656         d->currentcommit = NULL;
1657 }
1658
1659
1660
1661
1662 entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
1663 {
1664         int i;
1665         entityframe5_database_t *d;
1666         d = (entityframe5_database_t *)Mem_Alloc(pool, sizeof(*d));
1667         d->latestframenum = 0;
1668         for (i = 0;i < d->maxedicts;i++)
1669                 d->states[i] = defaultstate;
1670         return d;
1671 }
1672
1673 void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
1674 {
1675         // all the [maxedicts] memory is allocated at once, so there's only one
1676         // thing to free
1677         if (d->maxedicts)
1678                 Mem_Free(d->deltabits);
1679         Mem_Free(d);
1680 }
1681
1682 void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
1683 {
1684         if (d->maxedicts < newmax)
1685         {
1686                 unsigned char *data;
1687                 int oldmaxedicts = d->maxedicts;
1688                 int *olddeltabits = d->deltabits;
1689                 unsigned char *oldpriorities = d->priorities;
1690                 int *oldupdateframenum = d->updateframenum;
1691                 entity_state_t *oldstates = d->states;
1692                 unsigned char *oldvisiblebits = d->visiblebits;
1693                 d->maxedicts = newmax;
1694                 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));
1695                 d->deltabits = (int *)data;data += d->maxedicts * sizeof(int);
1696                 d->priorities = (unsigned char *)data;data += d->maxedicts * sizeof(unsigned char);
1697                 d->updateframenum = (int *)data;data += d->maxedicts * sizeof(int);
1698                 d->states = (entity_state_t *)data;data += d->maxedicts * sizeof(entity_state_t);
1699                 d->visiblebits = (unsigned char *)data;data += (d->maxedicts+7)/8 * sizeof(unsigned char);
1700                 if (oldmaxedicts)
1701                 {
1702                         memcpy(d->deltabits, olddeltabits, oldmaxedicts * sizeof(int));
1703                         memcpy(d->priorities, oldpriorities, oldmaxedicts * sizeof(unsigned char));
1704                         memcpy(d->updateframenum, oldupdateframenum, oldmaxedicts * sizeof(int));
1705                         memcpy(d->states, oldstates, oldmaxedicts * sizeof(entity_state_t));
1706                         memcpy(d->visiblebits, oldvisiblebits, (oldmaxedicts+7)/8 * sizeof(unsigned char));
1707                         // the previous buffers were a single allocation, so just one free
1708                         Mem_Free(olddeltabits);
1709                 }
1710         }
1711 }
1712
1713 int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
1714 {
1715         int limit, priority;
1716         entity_state_t *s;
1717         // if it is the player, update urgently
1718         if (stateindex == d->viewentnum)
1719                 return ENTITYFRAME5_PRIORITYLEVELS - 1;
1720         // priority increases each frame no matter what happens
1721         priority = d->priorities[stateindex] + 1;
1722         // players get an extra priority boost
1723         if (stateindex <= svs.maxclients)
1724                 priority++;
1725         // remove dead entities very quickly because they are just 2 bytes
1726         if (!d->states[stateindex].active)
1727         {
1728                 priority++;
1729                 return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
1730         }
1731         // certain changes are more noticable than others
1732         if (d->deltabits[stateindex] & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
1733                 priority++;
1734         // find the root entity this one is attached to, and judge relevance by it
1735         for (limit = 0;limit < 256;limit++)
1736         {
1737                 s = d->states + stateindex;
1738                 if (s->flags & RENDER_VIEWMODEL)
1739                         stateindex = d->viewentnum;
1740                 else if (s->tagentity)
1741                         stateindex = s->tagentity;
1742                 else
1743                         break;
1744                 if (d->maxedicts < stateindex)
1745                         EntityFrame5_ExpandEdicts(d, (stateindex+256)&~255);
1746         }
1747         if (limit >= 256)
1748                 Con_DPrintf("Protocol: Runaway loop recursing tagentity links on entity %i\n", stateindex);
1749         // now that we have the parent entity we can make some decisions based on
1750         // distance from the player
1751         if (VectorDistance(d->states[d->viewentnum].netcenter, s->netcenter) < 1024.0f)
1752                 priority++;
1753         return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
1754 }
1755
1756 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
1757 {
1758         unsigned int bits = 0;
1759
1760         prvm_eval_t *val;
1761         val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
1762         if(val && val->function)
1763                 return;
1764
1765         if (!s->active)
1766                 MSG_WriteShort(msg, number | 0x8000);
1767         else
1768         {
1769                 bits = changedbits;
1770                 if ((bits & E5_ORIGIN) && ((s->flags & RENDER_EXTERIORMODEL) || s->origin[0] < -4096 || s->origin[0] >= 4096 || s->origin[1] < -4096 || s->origin[1] >= 4096 || s->origin[2] < -4096 || s->origin[2] >= 4096))
1771                         bits |= E5_ORIGIN32;
1772                 if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
1773                         bits |= E5_ANGLES16;
1774                 if ((bits & E5_MODEL) && s->modelindex >= 256)
1775                         bits |= E5_MODEL16;
1776                 if ((bits & E5_FRAME) && s->frame >= 256)
1777                         bits |= E5_FRAME16;
1778                 if (bits & E5_EFFECTS)
1779                 {
1780                         if (s->effects & 0xFFFF0000)
1781                                 bits |= E5_EFFECTS32;
1782                         else if (s->effects & 0xFFFFFF00)
1783                                 bits |= E5_EFFECTS16;
1784                 }
1785                 if (bits >= 256)
1786                         bits |= E5_EXTEND1;
1787                 if (bits >= 65536)
1788                         bits |= E5_EXTEND2;
1789                 if (bits >= 16777216)
1790                         bits |= E5_EXTEND3;
1791                 MSG_WriteShort(msg, number);
1792                 MSG_WriteByte(msg, bits & 0xFF);
1793                 if (bits & E5_EXTEND1)
1794                         MSG_WriteByte(msg, (bits >> 8) & 0xFF);
1795                 if (bits & E5_EXTEND2)
1796                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
1797                 if (bits & E5_EXTEND3)
1798                         MSG_WriteByte(msg, (bits >> 24) & 0xFF);
1799                 if (bits & E5_FLAGS)
1800                         MSG_WriteByte(msg, s->flags);
1801                 if (bits & E5_ORIGIN)
1802                 {
1803                         if (bits & E5_ORIGIN32)
1804                         {
1805                                 MSG_WriteCoord32f(msg, s->origin[0]);
1806                                 MSG_WriteCoord32f(msg, s->origin[1]);
1807                                 MSG_WriteCoord32f(msg, s->origin[2]);
1808                         }
1809                         else
1810                         {
1811                                 MSG_WriteCoord13i(msg, s->origin[0]);
1812                                 MSG_WriteCoord13i(msg, s->origin[1]);
1813                                 MSG_WriteCoord13i(msg, s->origin[2]);
1814                         }
1815                 }
1816                 if (bits & E5_ANGLES)
1817                 {
1818                         if (bits & E5_ANGLES16)
1819                         {
1820                                 MSG_WriteAngle16i(msg, s->angles[0]);
1821                                 MSG_WriteAngle16i(msg, s->angles[1]);
1822                                 MSG_WriteAngle16i(msg, s->angles[2]);
1823                         }
1824                         else
1825                         {
1826                                 MSG_WriteAngle8i(msg, s->angles[0]);
1827                                 MSG_WriteAngle8i(msg, s->angles[1]);
1828                                 MSG_WriteAngle8i(msg, s->angles[2]);
1829                         }
1830                 }
1831                 if (bits & E5_MODEL)
1832                 {
1833                         if (bits & E5_MODEL16)
1834                                 MSG_WriteShort(msg, s->modelindex);
1835                         else
1836                                 MSG_WriteByte(msg, s->modelindex);
1837                 }
1838                 if (bits & E5_FRAME)
1839                 {
1840                         if (bits & E5_FRAME16)
1841                                 MSG_WriteShort(msg, s->frame);
1842                         else
1843                                 MSG_WriteByte(msg, s->frame);
1844                 }
1845                 if (bits & E5_SKIN)
1846                         MSG_WriteByte(msg, s->skin);
1847                 if (bits & E5_EFFECTS)
1848                 {
1849                         if (bits & E5_EFFECTS32)
1850                                 MSG_WriteLong(msg, s->effects);
1851                         else if (bits & E5_EFFECTS16)
1852                                 MSG_WriteShort(msg, s->effects);
1853                         else
1854                                 MSG_WriteByte(msg, s->effects);
1855                 }
1856                 if (bits & E5_ALPHA)
1857                         MSG_WriteByte(msg, s->alpha);
1858                 if (bits & E5_SCALE)
1859                         MSG_WriteByte(msg, s->scale);
1860                 if (bits & E5_COLORMAP)
1861                         MSG_WriteByte(msg, s->colormap);
1862                 if (bits & E5_ATTACHMENT)
1863                 {
1864                         MSG_WriteShort(msg, s->tagentity);
1865                         MSG_WriteByte(msg, s->tagindex);
1866                 }
1867                 if (bits & E5_LIGHT)
1868                 {
1869                         MSG_WriteShort(msg, s->light[0]);
1870                         MSG_WriteShort(msg, s->light[1]);
1871                         MSG_WriteShort(msg, s->light[2]);
1872                         MSG_WriteShort(msg, s->light[3]);
1873                         MSG_WriteByte(msg, s->lightstyle);
1874                         MSG_WriteByte(msg, s->lightpflags);
1875                 }
1876                 if (bits & E5_GLOW)
1877                 {
1878                         MSG_WriteByte(msg, s->glowsize);
1879                         MSG_WriteByte(msg, s->glowcolor);
1880                 }
1881                 if (bits & E5_COLORMOD)
1882                 {
1883                         MSG_WriteByte(msg, s->colormod[0]);
1884                         MSG_WriteByte(msg, s->colormod[1]);
1885                         MSG_WriteByte(msg, s->colormod[2]);
1886                 }
1887         }
1888 }
1889
1890 void EntityState5_ReadUpdate(entity_state_t *s, int number)
1891 {
1892         int bits;
1893         bits = MSG_ReadByte();
1894         if (bits & E5_EXTEND1)
1895         {
1896                 bits |= MSG_ReadByte() << 8;
1897                 if (bits & E5_EXTEND2)
1898                 {
1899                         bits |= MSG_ReadByte() << 16;
1900                         if (bits & E5_EXTEND3)
1901                                 bits |= MSG_ReadByte() << 24;
1902                 }
1903         }
1904         if (bits & E5_FULLUPDATE)
1905         {
1906                 *s = defaultstate;
1907                 s->active = true;
1908         }
1909         if (bits & E5_FLAGS)
1910                 s->flags = MSG_ReadByte();
1911         if (bits & E5_ORIGIN)
1912         {
1913                 if (bits & E5_ORIGIN32)
1914                 {
1915                         s->origin[0] = MSG_ReadCoord32f();
1916                         s->origin[1] = MSG_ReadCoord32f();
1917                         s->origin[2] = MSG_ReadCoord32f();
1918                 }
1919                 else
1920                 {
1921                         s->origin[0] = MSG_ReadCoord13i();
1922                         s->origin[1] = MSG_ReadCoord13i();
1923                         s->origin[2] = MSG_ReadCoord13i();
1924                 }
1925         }
1926         if (bits & E5_ANGLES)
1927         {
1928                 if (bits & E5_ANGLES16)
1929                 {
1930                         s->angles[0] = MSG_ReadAngle16i();
1931                         s->angles[1] = MSG_ReadAngle16i();
1932                         s->angles[2] = MSG_ReadAngle16i();
1933                 }
1934                 else
1935                 {
1936                         s->angles[0] = MSG_ReadAngle8i();
1937                         s->angles[1] = MSG_ReadAngle8i();
1938                         s->angles[2] = MSG_ReadAngle8i();
1939                 }
1940         }
1941         if (bits & E5_MODEL)
1942         {
1943                 if (bits & E5_MODEL16)
1944                         s->modelindex = (unsigned short) MSG_ReadShort();
1945                 else
1946                         s->modelindex = MSG_ReadByte();
1947         }
1948         if (bits & E5_FRAME)
1949         {
1950                 if (bits & E5_FRAME16)
1951                         s->frame = (unsigned short) MSG_ReadShort();
1952                 else
1953                         s->frame = MSG_ReadByte();
1954         }
1955         if (bits & E5_SKIN)
1956                 s->skin = MSG_ReadByte();
1957         if (bits & E5_EFFECTS)
1958         {
1959                 if (bits & E5_EFFECTS32)
1960                         s->effects = (unsigned int) MSG_ReadLong();
1961                 else if (bits & E5_EFFECTS16)
1962                         s->effects = (unsigned short) MSG_ReadShort();
1963                 else
1964                         s->effects = MSG_ReadByte();
1965         }
1966         if (bits & E5_ALPHA)
1967                 s->alpha = MSG_ReadByte();
1968         if (bits & E5_SCALE)
1969                 s->scale = MSG_ReadByte();
1970         if (bits & E5_COLORMAP)
1971                 s->colormap = MSG_ReadByte();
1972         if (bits & E5_ATTACHMENT)
1973         {
1974                 s->tagentity = (unsigned short) MSG_ReadShort();
1975                 s->tagindex = MSG_ReadByte();
1976         }
1977         if (bits & E5_LIGHT)
1978         {
1979                 s->light[0] = (unsigned short) MSG_ReadShort();
1980                 s->light[1] = (unsigned short) MSG_ReadShort();
1981                 s->light[2] = (unsigned short) MSG_ReadShort();
1982                 s->light[3] = (unsigned short) MSG_ReadShort();
1983                 s->lightstyle = MSG_ReadByte();
1984                 s->lightpflags = MSG_ReadByte();
1985         }
1986         if (bits & E5_GLOW)
1987         {
1988                 s->glowsize = MSG_ReadByte();
1989                 s->glowcolor = MSG_ReadByte();
1990         }
1991         if (bits & E5_COLORMOD)
1992         {
1993                 s->colormod[0] = MSG_ReadByte();
1994                 s->colormod[1] = MSG_ReadByte();
1995                 s->colormod[2] = MSG_ReadByte();
1996         }
1997
1998
1999         if (developer_networkentities.integer >= 2)
2000         {
2001                 Con_Printf("ReadFields e%i", number);
2002
2003                 if (bits & E5_ORIGIN)
2004                         Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
2005                 if (bits & E5_ANGLES)
2006                         Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
2007                 if (bits & E5_MODEL)
2008                         Con_Printf(" E5_MODEL %i", s->modelindex);
2009                 if (bits & E5_FRAME)
2010                         Con_Printf(" E5_FRAME %i", s->frame);
2011                 if (bits & E5_SKIN)
2012                         Con_Printf(" E5_SKIN %i", s->skin);
2013                 if (bits & E5_EFFECTS)
2014                         Con_Printf(" E5_EFFECTS %i", s->effects);
2015                 if (bits & E5_FLAGS)
2016                 {
2017                         Con_Printf(" E5_FLAGS %i (", s->flags);
2018                         if (s->flags & RENDER_STEP)
2019                                 Con_Print(" STEP");
2020                         if (s->flags & RENDER_GLOWTRAIL)
2021                                 Con_Print(" GLOWTRAIL");
2022                         if (s->flags & RENDER_VIEWMODEL)
2023                                 Con_Print(" VIEWMODEL");
2024                         if (s->flags & RENDER_EXTERIORMODEL)
2025                                 Con_Print(" EXTERIORMODEL");
2026                         if (s->flags & RENDER_LOWPRECISION)
2027                                 Con_Print(" LOWPRECISION");
2028                         if (s->flags & RENDER_COLORMAPPED)
2029                                 Con_Print(" COLORMAPPED");
2030                         if (s->flags & RENDER_SHADOW)
2031                                 Con_Print(" SHADOW");
2032                         if (s->flags & RENDER_LIGHT)
2033                                 Con_Print(" LIGHT");
2034                         if (s->flags & RENDER_NOSELFSHADOW)
2035                                 Con_Print(" NOSELFSHADOW");
2036                         Con_Print(")");
2037                 }
2038                 if (bits & E5_ALPHA)
2039                         Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
2040                 if (bits & E5_SCALE)
2041                         Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
2042                 if (bits & E5_COLORMAP)
2043                         Con_Printf(" E5_COLORMAP %i", s->colormap);
2044                 if (bits & E5_ATTACHMENT)
2045                         Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
2046                 if (bits & E5_LIGHT)
2047                         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);
2048                 if (bits & E5_GLOW)
2049                         Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
2050                 if (bits & E5_COLORMOD)
2051                         Con_Printf(" E5_COLORMOD %f:%f:%f", s->colormod[0] / 32.0f, s->colormod[1] / 32.0f, s->colormod[2] / 32.0f);
2052                 Con_Print("\n");
2053         }
2054 }
2055
2056 int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
2057 {
2058         unsigned int bits = 0;
2059         if (n->active)
2060         {
2061                 if (!o->active)
2062                         bits |= E5_FULLUPDATE;
2063                 if (!VectorCompare(o->origin, n->origin))
2064                         bits |= E5_ORIGIN;
2065                 if (!VectorCompare(o->angles, n->angles))
2066                         bits |= E5_ANGLES;
2067                 if (o->modelindex != n->modelindex)
2068                         bits |= E5_MODEL;
2069                 if (o->frame != n->frame)
2070                         bits |= E5_FRAME;
2071                 if (o->skin != n->skin)
2072                         bits |= E5_SKIN;
2073                 if (o->effects != n->effects)
2074                         bits |= E5_EFFECTS;
2075                 if (o->flags != n->flags)
2076                         bits |= E5_FLAGS;
2077                 if (o->alpha != n->alpha)
2078                         bits |= E5_ALPHA;
2079                 if (o->scale != n->scale)
2080                         bits |= E5_SCALE;
2081                 if (o->colormap != n->colormap)
2082                         bits |= E5_COLORMAP;
2083                 if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
2084                         bits |= E5_ATTACHMENT;
2085                 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)
2086                         bits |= E5_LIGHT;
2087                 if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
2088                         bits |= E5_GLOW;
2089                 if (o->colormod[0] != n->colormod[0] || o->colormod[1] != n->colormod[1] || o->colormod[2] != n->colormod[2])
2090                         bits |= E5_COLORMOD;
2091         }
2092         else
2093                 if (o->active)
2094                         bits |= E5_FULLUPDATE;
2095         return bits;
2096 }
2097
2098 void EntityFrame5_CL_ReadFrame(void)
2099 {
2100         int i, n, enumber;
2101         entity_t *ent;
2102         entity_state_t *s;
2103         // read the number of this frame to echo back in next input packet
2104         for (i = 0;i < LATESTFRAMENUMS-1;i++)
2105                 cl.latestframenums[i] = cl.latestframenums[i+1];
2106         cl.latestframenums[LATESTFRAMENUMS-1] = MSG_ReadLong();
2107         if (developer_networkentities.integer >= 10)
2108                 Con_Printf("recv: svc_entities %i\n", cl.latestframenums[LATESTFRAMENUMS-1]);
2109         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)
2110                 cls.servermovesequence = MSG_ReadLong();
2111         // read entity numbers until we find a 0x8000
2112         // (which would be remove world entity, but is actually a terminator)
2113         while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
2114         {
2115                 // get the entity number
2116                 enumber = n & 0x7FFF;
2117                 // we may need to expand the array
2118                 if (cl.num_entities <= enumber)
2119                 {
2120                         cl.num_entities = enumber + 1;
2121                         if (enumber >= cl.max_entities)
2122                                 CL_ExpandEntities(enumber);
2123                 }
2124                 // look up the entity
2125                 ent = cl.entities + enumber;
2126                 // slide the current into the previous slot
2127                 ent->state_previous = ent->state_current;
2128                 // read the update
2129                 s = &ent->state_current;
2130                 if (n & 0x8000)
2131                 {
2132                         // remove entity
2133                         *s = defaultstate;
2134                 }
2135                 else
2136                 {
2137                         // update entity
2138                         EntityState5_ReadUpdate(s, enumber);
2139                 }
2140                 // set the cl.entities_active flag
2141                 cl.entities_active[enumber] = s->active;
2142                 // set the update time
2143                 s->time = cl.mtime[0];
2144                 // fix the number (it gets wiped occasionally by copying from defaultstate)
2145                 s->number = enumber;
2146                 // check if we need to update the lerp stuff
2147                 if (s->active)
2148                         CL_MoveLerpEntityStates(&cl.entities[enumber]);
2149                 // print extra messages if desired
2150                 if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
2151                 {
2152                         if (cl.entities[enumber].state_current.active)
2153                                 Con_Printf("entity #%i has become active\n", enumber);
2154                         else if (cl.entities[enumber].state_previous.active)
2155                                 Con_Printf("entity #%i has become inactive\n", enumber);
2156                 }
2157         }
2158 }
2159
2160 void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum)
2161 {
2162         int i, j, k, l, bits;
2163         entityframe5_changestate_t *s, *s2;
2164         entityframe5_packetlog_t *p, *p2;
2165         unsigned char statsdeltabits[(MAX_CL_STATS+7)/8];
2166         // scan for packets that were lost
2167         for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
2168         {
2169                 if (p->packetnumber && p->packetnumber <= framenum)
2170                 {
2171                         // packet was lost - merge deltabits into the main array so they
2172                         // will be re-sent, but only if there is no newer update of that
2173                         // bit in the logs (as those will arrive before this update)
2174                         for (j = 0, s = p->states;j < p->numstates;j++, s++)
2175                         {
2176                                 // check for any newer updates to this entity and mask off any
2177                                 // overlapping bits (we don't need to send something again if
2178                                 // it has already been sent more recently)
2179                                 bits = s->bits & ~d->deltabits[s->number];
2180                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
2181                                 {
2182                                         if (p2->packetnumber > framenum)
2183                                         {
2184                                                 for (l = 0, s2 = p2->states;l < p2->numstates;l++, s2++)
2185                                                 {
2186                                                         if (s2->number == s->number)
2187                                                         {
2188                                                                 bits &= ~s2->bits;
2189                                                                 break;
2190                                                         }
2191                                                 }
2192                                         }
2193                                 }
2194                                 // if the bits haven't all been cleared, there were some bits
2195                                 // lost with this packet, so set them again now
2196                                 if (bits)
2197                                 {
2198                                         d->deltabits[s->number] |= bits;
2199                                         // if it was a very important update, set priority higher
2200                                         if (bits & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL || E5_COLORMAP))
2201                                                 d->priorities[s->number] = max(d->priorities[s->number], 4);
2202                                         else
2203                                                 d->priorities[s->number] = max(d->priorities[s->number], 1);
2204                                 }
2205                         }
2206                         // mark lost stats
2207                         for (j = 0;j < MAX_CL_STATS;j++)
2208                         {
2209                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2210                                         statsdeltabits[l] = p->statsdeltabits[l] & ~host_client->statsdeltabits[l];
2211                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS;k++, p2++)
2212                                         if (p2->packetnumber > framenum)
2213                                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2214                                                         statsdeltabits[l] = p->statsdeltabits[l] & ~p2->statsdeltabits[l];
2215                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2216                                         host_client->statsdeltabits[l] |= statsdeltabits[l];
2217                         }
2218                         // delete this packet log as it is now obsolete
2219                         p->packetnumber = 0;
2220                 }
2221         }
2222 }
2223
2224 void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
2225 {
2226         int i;
2227         // scan for packets made obsolete by this ack and delete them
2228         for (i = 0;i < ENTITYFRAME5_MAXPACKETLOGS;i++)
2229                 if (d->packetlog[i].packetnumber <= framenum)
2230                         d->packetlog[i].packetnumber = 0;
2231 }
2232
2233 void EntityFrame5_WriteFrame(sizebuf_t *msg, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int movesequence)
2234 {
2235         const entity_state_t *n;
2236         int i, num, l, framenum, packetlognumber, priority;
2237         sizebuf_t buf;
2238         unsigned char data[128];
2239         entityframe5_packetlog_t *packetlog;
2240
2241         if (prog->max_edicts > d->maxedicts)
2242                 EntityFrame5_ExpandEdicts(d, prog->max_edicts);
2243
2244         framenum = d->latestframenum + 1;
2245         d->viewentnum = viewentnum;
2246
2247         // if packet log is full, mark all frames as lost, this will cause
2248         // it to send the lost data again
2249         for (packetlognumber = 0;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++)
2250                 if (d->packetlog[packetlognumber].packetnumber == 0)
2251                         break;
2252         if (packetlognumber == ENTITYFRAME5_MAXPACKETLOGS)
2253         {
2254                 Con_DPrintf("EntityFrame5_WriteFrame: packetlog overflow for a client, resetting\n");
2255                 EntityFrame5_LostFrame(d, framenum);
2256                 packetlognumber = 0;
2257         }
2258
2259         // prepare the buffer
2260         memset(&buf, 0, sizeof(buf));
2261         buf.data = data;
2262         buf.maxsize = sizeof(data);
2263
2264         // detect changes in states
2265         num = 1;
2266         for (i = 0, n = states;i < numstates;i++, n++)
2267         {
2268                 // mark gaps in entity numbering as removed entities
2269                 for (;num < n->number;num++)
2270                 {
2271                         // if the entity used to exist, clear it
2272                         if (CHECKPVSBIT(d->visiblebits, num))
2273                         {
2274                                 CLEARPVSBIT(d->visiblebits, num);
2275                                 d->deltabits[num] = E5_FULLUPDATE;
2276                                 d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2277                                 d->states[num] = defaultstate;
2278                                 d->states[num].number = num;
2279                         }
2280                 }
2281                 // update the entity state data
2282                 if (!CHECKPVSBIT(d->visiblebits, num))
2283                 {
2284                         // entity just spawned in, don't let it completely hog priority
2285                         // because of being ancient on the first frame
2286                         d->updateframenum[num] = framenum;
2287                         // initial priority is a bit high to make projectiles send on the
2288                         // first frame, among other things
2289                         d->priorities[num] = max(d->priorities[num], 4);
2290                 }
2291                 SETPVSBIT(d->visiblebits, num);
2292                 d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
2293                 d->priorities[num] = max(d->priorities[num], 1);
2294                 d->states[num] = *n;
2295                 d->states[num].number = num;
2296                 // advance to next entity so the next iteration doesn't immediately remove it
2297                 num++;
2298         }
2299         // all remaining entities are dead
2300         for (;num < d->maxedicts;num++)
2301         {
2302                 if (CHECKPVSBIT(d->visiblebits, num))
2303                 {
2304                         CLEARPVSBIT(d->visiblebits, num);
2305                         d->deltabits[num] = E5_FULLUPDATE;
2306                         d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2307                         d->states[num] = defaultstate;
2308                         d->states[num].number = num;
2309                 }
2310         }
2311
2312         // if there isn't at least enough room for an empty svc_entities,
2313         // don't bother trying...
2314         if (buf.cursize + 11 > buf.maxsize)
2315                 return;
2316
2317         // build lists of entities by priority level
2318         memset(d->prioritychaincounts, 0, sizeof(d->prioritychaincounts));
2319         l = 0;
2320         for (num = 0;num < d->maxedicts;num++)
2321         {
2322                 if (d->priorities[num])
2323                 {
2324                         if (d->deltabits[num])
2325                         {
2326                                 if (d->priorities[num] < (ENTITYFRAME5_PRIORITYLEVELS - 1))
2327                                         d->priorities[num] = EntityState5_Priority(d, num);
2328                                 l = num;
2329                                 priority = d->priorities[num];
2330                                 if (d->prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
2331                                         d->prioritychains[priority][d->prioritychaincounts[priority]++] = num;
2332                         }
2333                         else
2334                                 d->priorities[num] = 0;
2335                 }
2336         }
2337
2338         // add packetlog entry
2339         packetlog = d->packetlog + packetlognumber;
2340         packetlog->packetnumber = framenum;
2341         packetlog->numstates = 0;
2342         // write stat updates
2343         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)
2344         {
2345                 for (i = 0;i < MAX_CL_STATS && msg->cursize + 6 + 11 <= msg->maxsize;i++)
2346                 {
2347                         if (host_client->statsdeltabits[i>>3] & (1<<(i&7)))
2348                         {
2349                                 host_client->statsdeltabits[i>>3] &= ~(1<<(i&7));
2350                                 packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
2351                                 if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
2352                                 {
2353                                         MSG_WriteByte(msg, svc_updatestatubyte);
2354                                         MSG_WriteByte(msg, i);
2355                                         MSG_WriteByte(msg, host_client->stats[i]);
2356                                 }
2357                                 else
2358                                 {
2359                                         MSG_WriteByte(msg, svc_updatestat);
2360                                         MSG_WriteByte(msg, i);
2361                                         MSG_WriteLong(msg, host_client->stats[i]);
2362                                 }
2363                         }
2364                 }
2365         }
2366         // write state updates
2367         if (developer_networkentities.integer >= 10)
2368                 Con_Printf("send: svc_entities %i\n", framenum);
2369         d->latestframenum = framenum;
2370         MSG_WriteByte(msg, svc_entities);
2371         MSG_WriteLong(msg, framenum);
2372         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)
2373                 MSG_WriteLong(msg, movesequence);
2374         for (priority = ENTITYFRAME5_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
2375         {
2376                 for (i = 0;i < d->prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
2377                 {
2378                         num = d->prioritychains[priority][i];
2379                         n = d->states + num;
2380                         if (d->deltabits[num] & E5_FULLUPDATE)
2381                                 d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
2382                         buf.cursize = 0;
2383                         EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
2384                         // if the entity won't fit, try the next one
2385                         if (msg->cursize + buf.cursize + 2 > msg->maxsize)
2386                                 continue;
2387                         // write entity to the packet
2388                         SZ_Write(msg, buf.data, buf.cursize);
2389                         // mark age on entity for prioritization
2390                         d->updateframenum[num] = framenum;
2391                         // log entity so deltabits can be restored later if lost
2392                         packetlog->states[packetlog->numstates].number = num;
2393                         packetlog->states[packetlog->numstates].bits = d->deltabits[num];
2394                         packetlog->numstates++;
2395                         // clear deltabits and priority so it won't be sent again
2396                         d->deltabits[num] = 0;
2397                         d->priorities[num] = 0;
2398                 }
2399         }
2400         MSG_WriteShort(msg, 0x8000);
2401 }
2402
2403
2404 static void QW_TranslateEffects(entity_state_t *s, int qweffects)
2405 {
2406         s->effects = 0;
2407         s->internaleffects = 0;
2408         if (qweffects & QW_EF_BRIGHTFIELD)
2409                 s->effects |= EF_BRIGHTFIELD;
2410         if (qweffects & QW_EF_MUZZLEFLASH)
2411                 s->effects |= EF_MUZZLEFLASH;
2412         if (qweffects & QW_EF_FLAG1)
2413         {
2414                 // mimic FTEQW's interpretation of EF_FLAG1 as EF_NODRAW on non-player entities
2415                 if (s->number > cl.maxclients)
2416                         s->effects |= EF_NODRAW;
2417                 else
2418                         s->internaleffects |= INTEF_FLAG1QW;
2419         }
2420         if (qweffects & QW_EF_FLAG2)
2421         {
2422                 // mimic FTEQW's interpretation of EF_FLAG2 as EF_ADDITIVE on non-player entities
2423                 if (s->number > cl.maxclients)
2424                         s->effects |= EF_ADDITIVE;
2425                 else
2426                         s->internaleffects |= INTEF_FLAG2QW;
2427         }
2428         if (qweffects & QW_EF_RED)
2429         {
2430                 if (qweffects & QW_EF_BLUE)
2431                         s->effects |= EF_RED | EF_BLUE;
2432                 else
2433                         s->effects |= EF_RED;
2434         }
2435         else if (qweffects & QW_EF_BLUE)
2436                 s->effects |= EF_BLUE;
2437         else if (qweffects & QW_EF_BRIGHTLIGHT)
2438                 s->effects |= EF_BRIGHTLIGHT;
2439         else if (qweffects & QW_EF_DIMLIGHT)
2440                 s->effects |= EF_DIMLIGHT;
2441 }
2442
2443 void EntityStateQW_ReadPlayerUpdate(void)
2444 {
2445         int slot = MSG_ReadByte();
2446         int enumber = slot + 1;
2447         int weaponframe;
2448         int msec;
2449         int playerflags;
2450         int bits;
2451         entity_state_t *s;
2452         // look up the entity
2453         entity_t *ent = cl.entities + enumber;
2454         vec3_t viewangles;
2455         vec3_t velocity;
2456
2457         // slide the current state into the previous
2458         ent->state_previous = ent->state_current;
2459
2460         // read the update
2461         s = &ent->state_current;
2462         *s = defaultstate;
2463         s->active = true;
2464         s->number = enumber;
2465         s->colormap = enumber;
2466         playerflags = MSG_ReadShort();
2467         MSG_ReadVector(s->origin, cls.protocol);
2468         s->frame = MSG_ReadByte();
2469
2470         VectorClear(viewangles);
2471         VectorClear(velocity);
2472
2473         if (playerflags & QW_PF_MSEC)
2474         {
2475                 // time difference between last update this player sent to the server,
2476                 // and last input we sent to the server (this packet is in response to
2477                 // our input, so msec is how long ago the last update of this player
2478                 // entity occurred, compared to our input being received)
2479                 msec = MSG_ReadByte();
2480         }
2481         else
2482                 msec = 0;
2483         if (playerflags & QW_PF_COMMAND)
2484         {
2485                 bits = MSG_ReadByte();
2486                 if (bits & QW_CM_ANGLE1)
2487                         viewangles[0] = MSG_ReadAngle16i(); // cmd->angles[0]
2488                 if (bits & QW_CM_ANGLE2)
2489                         viewangles[1] = MSG_ReadAngle16i(); // cmd->angles[1]
2490                 if (bits & QW_CM_ANGLE3)
2491                         viewangles[2] = MSG_ReadAngle16i(); // cmd->angles[2]
2492                 if (bits & QW_CM_FORWARD)
2493                         MSG_ReadShort(); // cmd->forwardmove
2494                 if (bits & QW_CM_SIDE)
2495                         MSG_ReadShort(); // cmd->sidemove
2496                 if (bits & QW_CM_UP)
2497                         MSG_ReadShort(); // cmd->upmove
2498                 if (bits & QW_CM_BUTTONS)
2499                         MSG_ReadByte(); // cmd->buttons
2500                 if (bits & QW_CM_IMPULSE)
2501                         MSG_ReadByte(); // cmd->impulse
2502                 MSG_ReadByte(); // cmd->msec
2503         }
2504         if (playerflags & QW_PF_VELOCITY1)
2505                 velocity[0] = MSG_ReadShort();
2506         if (playerflags & QW_PF_VELOCITY2)
2507                 velocity[1] = MSG_ReadShort();
2508         if (playerflags & QW_PF_VELOCITY3)
2509                 velocity[2] = MSG_ReadShort();
2510         if (playerflags & QW_PF_MODEL)
2511                 s->modelindex = MSG_ReadByte();
2512         else
2513                 s->modelindex = cl.qw_modelindex_player;
2514         if (playerflags & QW_PF_SKINNUM)
2515                 s->skin = MSG_ReadByte();
2516         if (playerflags & QW_PF_EFFECTS)
2517                 QW_TranslateEffects(s, MSG_ReadByte());
2518         if (playerflags & QW_PF_WEAPONFRAME)
2519                 weaponframe = MSG_ReadByte();
2520         else
2521                 weaponframe = 0;
2522
2523         if (enumber == cl.playerentity)
2524         {
2525                 // if this is an update on our player, update the angles
2526                 VectorCopy(cl.viewangles, viewangles);
2527         }
2528
2529         // calculate the entity angles from the viewangles
2530         s->angles[0] = viewangles[0] * -0.0333;
2531         s->angles[1] = viewangles[1];
2532         s->angles[2] = 0;
2533         s->angles[2] = V_CalcRoll(s->angles, velocity)*4;
2534
2535         // if this is an update on our player, update interpolation state
2536         if (enumber == cl.playerentity)
2537         {
2538                 VectorCopy (cl.mpunchangle[0], cl.mpunchangle[1]);
2539                 VectorCopy (cl.mpunchvector[0], cl.mpunchvector[1]);
2540                 VectorCopy (cl.mvelocity[0], cl.mvelocity[1]);
2541                 cl.mviewzoom[1] = cl.mviewzoom[0];
2542
2543                 cl.idealpitch = 0;
2544                 cl.mpunchangle[0][0] = 0;
2545                 cl.mpunchangle[0][1] = 0;
2546                 cl.mpunchangle[0][2] = 0;
2547                 cl.mpunchvector[0][0] = 0;
2548                 cl.mpunchvector[0][1] = 0;
2549                 cl.mpunchvector[0][2] = 0;
2550                 cl.mvelocity[0][0] = 0;
2551                 cl.mvelocity[0][1] = 0;
2552                 cl.mvelocity[0][2] = 0;
2553                 cl.mviewzoom[0] = 1;
2554
2555                 VectorCopy(velocity, cl.mvelocity[0]);
2556                 cl.stats[STAT_WEAPONFRAME] = weaponframe;
2557                 if (playerflags & QW_PF_GIB)
2558                         cl.stats[STAT_VIEWHEIGHT] = 8;
2559                 else if (playerflags & QW_PF_DEAD)
2560                         cl.stats[STAT_VIEWHEIGHT] = -16;
2561                 else
2562                         cl.stats[STAT_VIEWHEIGHT] = 22;
2563         }
2564
2565         // set the cl.entities_active flag
2566         cl.entities_active[enumber] = s->active;
2567         // set the update time
2568         s->time = cl.mtime[0] - msec * 0.001; // qw has no clock
2569         // check if we need to update the lerp stuff
2570         if (s->active)
2571                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
2572 }
2573
2574 static void EntityStateQW_ReadEntityUpdate(entity_state_t *s, int bits)
2575 {
2576         int qweffects = 0;
2577         s->active = true;
2578         s->number = bits & 511;
2579         bits &= ~511;
2580         if (bits & QW_U_MOREBITS)
2581                 bits |= MSG_ReadByte();
2582
2583         // store the QW_U_SOLID bit here?
2584
2585         if (bits & QW_U_MODEL)
2586                 s->modelindex = MSG_ReadByte();
2587         if (bits & QW_U_FRAME)
2588                 s->frame = MSG_ReadByte();
2589         if (bits & QW_U_COLORMAP)
2590                 s->colormap = MSG_ReadByte();
2591         if (bits & QW_U_SKIN)
2592                 s->skin = MSG_ReadByte();
2593         if (bits & QW_U_EFFECTS)
2594                 QW_TranslateEffects(s, qweffects = MSG_ReadByte());
2595         if (bits & QW_U_ORIGIN1)
2596                 s->origin[0] = MSG_ReadCoord13i();
2597         if (bits & QW_U_ANGLE1)
2598                 s->angles[0] = MSG_ReadAngle8i();
2599         if (bits & QW_U_ORIGIN2)
2600                 s->origin[1] = MSG_ReadCoord13i();
2601         if (bits & QW_U_ANGLE2)
2602                 s->angles[1] = MSG_ReadAngle8i();
2603         if (bits & QW_U_ORIGIN3)
2604                 s->origin[2] = MSG_ReadCoord13i();
2605         if (bits & QW_U_ANGLE3)
2606                 s->angles[2] = MSG_ReadAngle8i();
2607
2608         if (developer_networkentities.integer >= 2)
2609         {
2610                 Con_Printf("ReadFields e%i", s->number);
2611                 if (bits & QW_U_MODEL)
2612                         Con_Printf(" U_MODEL %i", s->modelindex);
2613                 if (bits & QW_U_FRAME)
2614                         Con_Printf(" U_FRAME %i", s->frame);
2615                 if (bits & QW_U_COLORMAP)
2616                         Con_Printf(" U_COLORMAP %i", s->colormap);
2617                 if (bits & QW_U_SKIN)
2618                         Con_Printf(" U_SKIN %i", s->skin);
2619                 if (bits & QW_U_EFFECTS)
2620                         Con_Printf(" U_EFFECTS %i", qweffects);
2621                 if (bits & QW_U_ORIGIN1)
2622                         Con_Printf(" U_ORIGIN1 %f", s->origin[0]);
2623                 if (bits & QW_U_ANGLE1)
2624                         Con_Printf(" U_ANGLE1 %f", s->angles[0]);
2625                 if (bits & QW_U_ORIGIN2)
2626                         Con_Printf(" U_ORIGIN2 %f", s->origin[1]);
2627                 if (bits & QW_U_ANGLE2)
2628                         Con_Printf(" U_ANGLE2 %f", s->angles[1]);
2629                 if (bits & QW_U_ORIGIN3)
2630                         Con_Printf(" U_ORIGIN3 %f", s->origin[2]);
2631                 if (bits & QW_U_ANGLE3)
2632                         Con_Printf(" U_ANGLE3 %f", s->angles[2]);
2633                 if (bits & QW_U_SOLID)
2634                         Con_Printf(" U_SOLID");
2635                 Con_Print("\n");
2636         }
2637 }
2638
2639 entityframeqw_database_t *EntityFrameQW_AllocDatabase(mempool_t *pool)
2640 {
2641         entityframeqw_database_t *d;
2642         d = (entityframeqw_database_t *)Mem_Alloc(pool, sizeof(*d));
2643         return d;
2644 }
2645
2646 void EntityFrameQW_FreeDatabase(entityframeqw_database_t *d)
2647 {
2648         Mem_Free(d);
2649 }
2650
2651 void EntityFrameQW_CL_ReadFrame(qboolean delta)
2652 {
2653         qboolean invalid = false;
2654         int number, oldsnapindex, newsnapindex, oldindex, newindex, oldnum, newnum;
2655         entity_t *ent;
2656         entityframeqw_database_t *d;
2657         entityframeqw_snapshot_t *oldsnap, *newsnap;
2658
2659         if (!cl.entitydatabaseqw)
2660                 cl.entitydatabaseqw = EntityFrameQW_AllocDatabase(cls.levelmempool);
2661         d = cl.entitydatabaseqw;
2662
2663         // there is no cls.netcon in demos, so this reading code can't access
2664         // cls.netcon-> at all...  so cls.qw_incoming_sequence and
2665         // cls.qw_outgoing_sequence are updated every time the corresponding
2666         // cls.netcon->qw. variables are updated
2667         // read the number of this frame to echo back in next input packet
2668         cl.qw_validsequence = cls.qw_incoming_sequence;
2669         newsnapindex = cl.qw_validsequence & QW_UPDATE_MASK;
2670         newsnap = d->snapshot + newsnapindex;
2671         memset(newsnap, 0, sizeof(*newsnap));
2672         oldsnapindex = -1;
2673         oldsnap = NULL;
2674         if (delta)
2675         {
2676                 number = MSG_ReadByte();
2677                 oldsnapindex = cl.qw_deltasequence[newsnapindex];
2678                 if ((number & QW_UPDATE_MASK) != (oldsnapindex & QW_UPDATE_MASK))
2679                         Con_DPrintf("WARNING: from mismatch\n");
2680                 if (oldsnapindex != -1)
2681                 {
2682                         if (cls.qw_outgoing_sequence - oldsnapindex >= QW_UPDATE_BACKUP-1)
2683                         {
2684                                 Con_DPrintf("delta update too old\n");
2685                                 newsnap->invalid = invalid = true; // too old
2686                                 delta = false;
2687                         }
2688                         oldsnap = d->snapshot + (oldsnapindex & QW_UPDATE_MASK);
2689                 }
2690                 else
2691                         delta = false;
2692         }
2693
2694         // if we can't decode this frame properly, report that to the server
2695         if (invalid)
2696                 cl.qw_validsequence = 0;
2697
2698         // read entity numbers until we find a 0x0000
2699         // (which would be an empty update on world entity, but is actually a terminator)
2700         newsnap->num_entities = 0;
2701         oldindex = 0;
2702         for (;;)
2703         {
2704                 int word = (unsigned short)MSG_ReadShort();
2705                 if (msg_badread)
2706                         return; // just return, the main parser will print an error
2707                 newnum = word == 0 ? 512 : (word & 511);
2708                 oldnum = delta ? (oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number) : 9999;
2709
2710                 // copy unmodified oldsnap entities
2711                 while (newnum > oldnum) // delta only
2712                 {
2713                         if (developer_networkentities.integer >= 2)
2714                                 Con_Printf("copy %i\n", oldnum);
2715                         // copy one of the old entities
2716                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2717                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2718                         newsnap->entities[newsnap->num_entities] = oldsnap->entities[oldindex++];
2719                         newsnap->num_entities++;
2720                         oldnum = oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number;
2721                 }
2722
2723                 if (word == 0)
2724                         break;
2725
2726                 if (developer_networkentities.integer >= 2)
2727                 {
2728                         if (word & QW_U_REMOVE)
2729                                 Con_Printf("remove %i\n", newnum);
2730                         else if (newnum == oldnum)
2731                                 Con_Printf("delta %i\n", newnum);
2732                         else
2733                                 Con_Printf("baseline %i\n", newnum);
2734                 }
2735
2736                 if (word & QW_U_REMOVE)
2737                 {
2738                         if (newnum != oldnum && !delta && !invalid)
2739                         {
2740                                 cl.qw_validsequence = 0;
2741                                 Con_Printf("WARNING: U_REMOVE %i on full update\n", newnum);
2742                         }
2743                 }
2744                 else
2745                 {
2746                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2747                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2748                         newsnap->entities[newsnap->num_entities] = (newnum == oldnum) ? oldsnap->entities[oldindex] : cl.entities[newnum].state_baseline;
2749                         EntityStateQW_ReadEntityUpdate(newsnap->entities + newsnap->num_entities, word);
2750                         newsnap->num_entities++;
2751                 }
2752
2753                 if (newnum == oldnum)
2754                         oldindex++;
2755         }
2756
2757         // expand cl.num_entities to include every entity we've seen this game
2758         newnum = newsnap->num_entities ? newsnap->entities[newsnap->num_entities - 1].number : 1;
2759         if (cl.num_entities <= newnum)
2760         {
2761                 cl.num_entities = newnum + 1;
2762                 if (cl.max_entities < newnum + 1)
2763                         CL_ExpandEntities(newnum);
2764         }
2765
2766         // now update the non-player entities from the snapshot states
2767         number = cl.maxclients + 1;
2768         for (newindex = 0;;newindex++)
2769         {
2770                 newnum = newindex >= newsnap->num_entities ? cl.num_entities : newsnap->entities[newindex].number;
2771                 // kill any missing entities
2772                 for (;number < newnum;number++)
2773                 {
2774                         if (cl.entities_active[number])
2775                         {
2776                                 cl.entities_active[number] = false;
2777                                 cl.entities[number].state_current.active = false;
2778                         }
2779                 }
2780                 if (number >= cl.num_entities)
2781                         break;
2782                 // update the entity
2783                 ent = &cl.entities[number];
2784                 ent->state_previous = ent->state_current;
2785                 ent->state_current = newsnap->entities[newindex];
2786                 ent->state_current.time = cl.mtime[0];
2787                 CL_MoveLerpEntityStates(ent);
2788                 // the entity lives again...
2789                 cl.entities_active[number] = true;
2790                 number++;
2791         }
2792 }