protocol.c

   1
   2 #include "quakedef.h"
   3
   4 #define E5_PROTOCOL_PRIORITYLEVELS 32
   5
   6 // this is 88 bytes (must match entity_state_t in protocol.h)
   7 entity_state_t defaultstate =
   8 {
   9         // ! means this is not sent to client
  10         0,//double time; // ! time this state was built (used on client for interpolation)
  11         {0,0,0},//float origin[3];
  12         {0,0,0},//float angles[3];
  13         0,//int number; // entity number this state is for
  14         0,//int effects;
  15         0,//unsigned int customizeentityforclient; // !
  16         0,//unsigned short modelindex;
  17         0,//unsigned short frame;
  18         0,//unsigned short tagentity;
  19         0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
  20         0,//unsigned short viewmodelforclient; // !
  21         0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
  22         0,//unsigned short nodrawtoclient; // !
  23         0,//unsigned short drawonlytoclient; // !
  24         {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
  25         0,//unsigned char active; // true if a valid state
  26         0,//unsigned char lightstyle;
  27         0,//unsigned char lightpflags;
  28         0,//unsigned char colormap;
  29         0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
  30         255,//unsigned char alpha;
  31         16,//unsigned char scale;
  32         0,//unsigned char glowsize;
  33         254,//unsigned char glowcolor;
  34         0,//unsigned char flags;
  35         0,//unsigned char tagindex;
  36         {32, 32, 32},//unsigned char colormod[3];
  37         // padding to a multiple of 8 bytes (to align the double time)
  38         {0,0,0,0,0,0}//unsigned char unused[6]; // !
  39 };
  40
  41 // LordHavoc: I own protocol ranges 96, 97, 3500-3599
  42
  43 struct protocolversioninfo_s
  44 {
  45         int number;
  46         const char *name;
  47 }
  48 protocolversioninfo[] =
  49 {
  50         {0, "UNKNOWN"},
  51         {3504, "DP7"},
  52         {3503, "DP6"},
  53         {3502, "DP5"},
  54         {3501, "DP4"},
  55         {3500, "DP3"},
  56         {97, "DP2"},
  57         {96, "DP1"},
  58         {15, "QUAKEDP"},
  59         {250, "NEHAHRAMOVIE"},
  60         {15, "QUAKE"},
  61         {28, "QUAKEWORLD"},
  62         {0, NULL}
  63 };
  64
  65 static mempool_t *sv2csqc = NULL;
  66 int csqc_clent = 0;
  67 sizebuf_t *sv2csqcbuf = NULL;
  68 static unsigned char *sv2csqcents_version[MAX_SCOREBOARD];
  69
  70 static entity_frame_t deltaframe; // FIXME?
  71 static entity_frame_t framedata; // FIXME?
  72
  73 int entityframe5_prioritychaincounts[E5_PROTOCOL_PRIORITYLEVELS];
  74 unsigned short entityframe5_prioritychains[E5_PROTOCOL_PRIORITYLEVELS][ENTITYFRAME5_MAXSTATES];
  75
  76 protocolversion_t Protocol_EnumForName(const char *s)
  77 {
  78         int i;
  79         for (i = 1;protocolversioninfo[i].name;i++)
  80                 if (!strcasecmp(s, protocolversioninfo[i].name))
  81                         return (protocolversion_t)i;
  82         return PROTOCOL_UNKNOWN;
  83 }
  84
  85 const char *Protocol_NameForEnum(protocolversion_t p)
  86 {
  87         return protocolversioninfo[p].name;
  88 }
  89
  90 protocolversion_t Protocol_EnumForNumber(int n)
  91 {
  92         int i;
  93         for (i = 1;protocolversioninfo[i].name;i++)
  94                 if (protocolversioninfo[i].number == n)
  95                         return (protocolversion_t)i;
  96         return PROTOCOL_UNKNOWN;
  97 }
  98
  99 int Protocol_NumberForEnum(protocolversion_t p)
 100 {
 101         return protocolversioninfo[p].number;
 102 }
 103
 104 void Protocol_Names(char *buffer, size_t buffersize)
 105 {
 106         int i;
 107         if (buffersize < 1)
 108                 return;
 109         buffer[0] = 0;
 110         for (i = 1;protocolversioninfo[i].name;i++)
 111         {
 112                 if (i > 1)
 113                         strlcat(buffer, " ", sizeof(buffer));
 114                 strlcat(buffer, protocolversioninfo[i].name, sizeof(buffer));
 115         }
 116 }
 117
 118 void EntityFrameQuake_ReadEntity(int bits)
 119 {
 120         int num;
 121         entity_t *ent;
 122         entity_state_t s;
 123
 124         if (bits & U_MOREBITS)
 125                 bits |= (MSG_ReadByte()<<8);
 126         if ((bits & U_EXTEND1) && cls.protocol != PROTOCOL_NEHAHRAMOVIE)
 127         {
 128                 bits |= MSG_ReadByte() << 16;
 129                 if (bits & U_EXTEND2)
 130                         bits |= MSG_ReadByte() << 24;
 131         }
 132
 133         if (bits & U_LONGENTITY)
 134                 num = (unsigned short) MSG_ReadShort ();
 135         else
 136                 num = MSG_ReadByte ();
 137
 138         if (num >= MAX_EDICTS)
 139                 Host_Error("EntityFrameQuake_ReadEntity: entity number (%i) >= MAX_EDICTS (%i)", num, MAX_EDICTS);
 140         if (num < 1)
 141                 Host_Error("EntityFrameQuake_ReadEntity: invalid entity number (%i)", num);
 142
 143         if (cl.num_entities <= num)
 144         {
 145                 cl.num_entities = num + 1;
 146                 if (num >= cl.max_entities)
 147                         CL_ExpandEntities(num);
 148         }
 149
 150         ent = cl.entities + num;
 151
 152         // note: this inherits the 'active' state of the baseline chosen
 153         // (state_baseline is always active, state_current may not be active if
 154         // the entity was missing in the last frame)
 155         if (bits & U_DELTA)
 156                 s = ent->state_current;
 157         else
 158         {
 159                 s = ent->state_baseline;
 160                 s.active = true;
 161         }
 162
 163         cl.isquakeentity[num] = true;
 164         if (cl.lastquakeentity < num)
 165                 cl.lastquakeentity = num;
 166         s.number = num;
 167         s.time = cl.mtime[0];
 168         s.flags = 0;
 169         if (bits & U_MODEL)             s.modelindex = (s.modelindex & 0xFF00) | MSG_ReadByte();
 170         if (bits & U_FRAME)             s.frame = (s.frame & 0xFF00) | MSG_ReadByte();
 171         if (bits & U_COLORMAP)  s.colormap = MSG_ReadByte();
 172         if (bits & U_SKIN)              s.skin = MSG_ReadByte();
 173         if (bits & U_EFFECTS)   s.effects = (s.effects & 0xFF00) | MSG_ReadByte();
 174         if (bits & U_ORIGIN1)   s.origin[0] = MSG_ReadCoord(cls.protocol);
 175         if (bits & U_ANGLE1)    s.angles[0] = MSG_ReadAngle(cls.protocol);
 176         if (bits & U_ORIGIN2)   s.origin[1] = MSG_ReadCoord(cls.protocol);
 177         if (bits & U_ANGLE2)    s.angles[1] = MSG_ReadAngle(cls.protocol);
 178         if (bits & U_ORIGIN3)   s.origin[2] = MSG_ReadCoord(cls.protocol);
 179         if (bits & U_ANGLE3)    s.angles[2] = MSG_ReadAngle(cls.protocol);
 180         if (bits & U_STEP)              s.flags |= RENDER_STEP;
 181         if (bits & U_ALPHA)             s.alpha = MSG_ReadByte();
 182         if (bits & U_SCALE)             s.scale = MSG_ReadByte();
 183         if (bits & U_EFFECTS2)  s.effects = (s.effects & 0x00FF) | (MSG_ReadByte() << 8);
 184         if (bits & U_GLOWSIZE)  s.glowsize = MSG_ReadByte();
 185         if (bits & U_GLOWCOLOR) s.glowcolor = MSG_ReadByte();
 186         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));}
 187         if (bits & U_GLOWTRAIL) s.flags |= RENDER_GLOWTRAIL;
 188         if (bits & U_FRAME2)    s.frame = (s.frame & 0x00FF) | (MSG_ReadByte() << 8);
 189         if (bits & U_MODEL2)    s.modelindex = (s.modelindex & 0x00FF) | (MSG_ReadByte() << 8);
 190         if (bits & U_VIEWMODEL) s.flags |= RENDER_VIEWMODEL;
 191         if (bits & U_EXTERIORMODEL)     s.flags |= RENDER_EXTERIORMODEL;
 192
 193         // LordHavoc: to allow playback of the Nehahra movie
 194         if (cls.protocol == PROTOCOL_NEHAHRAMOVIE && (bits & U_EXTEND1))
 195         {
 196                 // LordHavoc: evil format
 197                 int i = (int)MSG_ReadFloat();
 198                 int j = (int)(MSG_ReadFloat() * 255.0f);
 199                 if (i == 2)
 200                 {
 201                         i = (int)MSG_ReadFloat();
 202                         if (i)
 203                                 s.effects |= EF_FULLBRIGHT;
 204                 }
 205                 if (j < 0)
 206                         s.alpha = 0;
 207                 else if (j == 0 || j >= 255)
 208                         s.alpha = 255;
 209                 else
 210                         s.alpha = j;
 211         }
 212
 213         ent->state_previous = ent->state_current;
 214         ent->state_current = s;
 215         if (ent->state_current.active)
 216         {
 217                 CL_MoveLerpEntityStates(ent);
 218                 cl.entities_active[ent->state_current.number] = true;
 219         }
 220
 221         if (msg_badread)
 222                 Host_Error("EntityFrameQuake_ReadEntity: read error");
 223 }
 224
 225 void EntityFrameQuake_ISeeDeadEntities(void)
 226 {
 227         int num, lastentity;
 228         if (cl.lastquakeentity == 0)
 229                 return;
 230         lastentity = cl.lastquakeentity;
 231         cl.lastquakeentity = 0;
 232         for (num = 0;num <= lastentity;num++)
 233         {
 234                 if (cl.isquakeentity[num])
 235                 {
 236                         if (cl.entities_active[num] && cl.entities[num].state_current.time == cl.mtime[0])
 237                         {
 238                                 cl.isquakeentity[num] = true;
 239                                 cl.lastquakeentity = num;
 240                         }
 241                         else
 242                         {
 243                                 cl.isquakeentity[num] = false;
 244                                 cl.entities_active[num] = false;
 245                                 cl.entities[num].state_current = defaultstate;
 246                                 cl.entities[num].state_current.number = num;
 247                         }
 248                 }
 249         }
 250 }
 251
 252 void EntityFrameCSQC_ClearVersions (void)
 253 {
 254         if(sv2csqc)
 255         {
 256                 Mem_FreePool(&sv2csqc);
 257                 sv2csqc = NULL;
 258         }
 259         memset(sv2csqcents_version, 0, MAX_SCOREBOARD*sizeof(unsigned char *));
 260 }
 261
 262 void EntityFrameCSQC_InitClientVersions (int client, qboolean clear)
 263 {
 264         if(!sv2csqc)
 265                 sv2csqc = Mem_AllocPool("SV2CSQC", 0, NULL);
 266         if(sv2csqcents_version[client])
 267         {
 268                 Mem_Free(sv2csqcents_version[client]);
 269                 sv2csqcents_version[client] = NULL;
 270         }
 271         sv2csqcents_version[client] = (unsigned char *)Mem_Alloc(sv2csqc, MAX_EDICTS);
 272         memset(sv2csqcents_version[client], 0, MAX_EDICTS);
 273 }
 274
 275 //[515]: we use only one array per-client for SendEntity feature
 276 void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int numstates, const entity_state_t *states)
 277 {
 278         sizebuf_t                               buf;
 279         unsigned char                                   data[2048];
 280         const entity_state_t    *s;
 281         unsigned short                  i, t, t2, t0;
 282         prvm_eval_t                             *val, *val2;
 283         int                                             csqcents = 0;
 284
 285         if(prog->fieldoffsets.SendEntity < 0 || prog->fieldoffsets.Version < 0)
 286                 return;
 287         --csqc_clent;
 288         if(!sv2csqcents_version[csqc_clent])
 289                 EntityFrameCSQC_InitClientVersions(csqc_clent, false);
 290
 291         for (csqcents = i = 0, s = states;i < numstates;i++, s++)
 292         {
 293                 //[515]: entities remove
 294                 if(i+1 >= numstates)
 295                         t2 = prog->num_edicts;
 296                 else
 297                         t2 = states[i+1].number;
 298                 if(!i)
 299                 {
 300                         t0 = 1;
 301                         t2 = s->number;
 302                 }
 303                 else
 304                         t0 = s->number+1;
 305                 for(t=t0; t<t2 ;t++)
 306                         if(sv2csqcents_version[csqc_clent][t])
 307                         {
 308                                 if(!csqcents)
 309                                 {
 310                                         csqcents = 1;
 311                                         memset(&buf, 0, sizeof(buf));
 312                                         buf.data = data;
 313                                         buf.maxsize = sizeof(data);
 314                                         sv2csqcbuf = &buf;
 315                                         SZ_Clear(&buf);
 316                                         MSG_WriteByte(&buf, svc_csqcentities);
 317                                 }
 318                                 sv2csqcents_version[csqc_clent][t] = 0;
 319                                 MSG_WriteShort(&buf, (unsigned short)t | 0x8000);
 320                                 csqcents++;
 321                         }
 322                 //[515]: entities remove
 323
 324 //              if(!s->active)
 325 //                      continue;
 326                 val = PRVM_GETEDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
 327                 if(val->function)
 328                 {
 329                         val2 = PRVM_GETEDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.Version);
 330                         if(sv2csqcents_version[csqc_clent][s->number] == (unsigned char)val2->_float)
 331                                 continue;
 332                         if(!csqcents)
 333                         {
 334                                 csqcents = 1;
 335                                 memset(&buf, 0, sizeof(buf));
 336                                 buf.data = data;
 337                                 buf.maxsize = sizeof(data);
 338                                 sv2csqcbuf = &buf;
 339                                 SZ_Clear(&buf);
 340                                 MSG_WriteByte(&buf, svc_csqcentities);
 341                         }
 342                         if((unsigned char)val2->_float == 0)
 343                                 val2->_float = 1;
 344                         MSG_WriteShort(&buf, s->number);
 345                         ((int *)prog->globals.generic)[OFS_PARM0] = csqc_clent+1;
 346                         prog->globals.server->self = s->number;
 347                         PRVM_ExecuteProgram(val->function, "Null SendEntity\n");
 348                         if(!prog->globals.generic[OFS_RETURN])
 349                         {
 350                                 buf.cursize -= 2;
 351                                 if(sv2csqcents_version[csqc_clent][s->number])
 352                                 {
 353                                         sv2csqcents_version[csqc_clent][s->number] = 0;
 354                                         MSG_WriteShort(&buf, (unsigned short)s->number | 0x8000);
 355                                         csqcents++;
 356                                 }
 357                         }
 358                         else
 359                         {
 360                                 sv2csqcents_version[csqc_clent][s->number] = (unsigned char)val2->_float;
 361                                 csqcents++;
 362                         }
 363                         if (msg->cursize + buf.cursize > msg->maxsize)
 364                                 break;
 365                 }
 366         }
 367         if(csqcents)
 368         {
 369                 if(csqcents > 1)
 370                 {
 371                         MSG_WriteShort(&buf, 0);
 372                         SZ_Write(msg, buf.data, buf.cursize);
 373                 }
 374                 sv2csqcbuf = NULL;
 375         }
 376 }
 377
 378 void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int numstates, const entity_state_t *states)
 379 {
 380         const entity_state_t *s;
 381         entity_state_t baseline;
 382         int i, bits;
 383         sizebuf_t buf;
 384         unsigned char data[128];
 385         prvm_eval_t *val;
 386
 387         // prepare the buffer
 388         memset(&buf, 0, sizeof(buf));
 389         buf.data = data;
 390         buf.maxsize = sizeof(data);
 391
 392         for (i = 0, s = states;i < numstates;i++, s++)
 393         {
 394                 val = PRVM_GETEDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
 395                 if(val && val->function)
 396                         continue;
 397
 398                 // prepare the buffer
 399                 SZ_Clear(&buf);
 400
 401 // send an update
 402                 bits = 0;
 403                 if (s->number >= 256)
 404                         bits |= U_LONGENTITY;
 405                 if (s->flags & RENDER_STEP)
 406                         bits |= U_STEP;
 407                 if (s->flags & RENDER_VIEWMODEL)
 408                         bits |= U_VIEWMODEL;
 409                 if (s->flags & RENDER_GLOWTRAIL)
 410                         bits |= U_GLOWTRAIL;
 411                 if (s->flags & RENDER_EXTERIORMODEL)
 412                         bits |= U_EXTERIORMODEL;
 413
 414                 // LordHavoc: old stuff, but rewritten to have more exact tolerances
 415                 baseline = prog->edicts[s->number].priv.server->baseline;
 416                 if (baseline.origin[0] != s->origin[0])
 417                         bits |= U_ORIGIN1;
 418                 if (baseline.origin[1] != s->origin[1])
 419                         bits |= U_ORIGIN2;
 420                 if (baseline.origin[2] != s->origin[2])
 421                         bits |= U_ORIGIN3;
 422                 if (baseline.angles[0] != s->angles[0])
 423                         bits |= U_ANGLE1;
 424                 if (baseline.angles[1] != s->angles[1])
 425                         bits |= U_ANGLE2;
 426                 if (baseline.angles[2] != s->angles[2])
 427                         bits |= U_ANGLE3;
 428                 if (baseline.colormap != s->colormap)
 429                         bits |= U_COLORMAP;
 430                 if (baseline.skin != s->skin)
 431                         bits |= U_SKIN;
 432                 if (baseline.frame != s->frame)
 433                 {
 434                         bits |= U_FRAME;
 435                         if (s->frame & 0xFF00)
 436                                 bits |= U_FRAME2;
 437                 }
 438                 if (baseline.effects != s->effects)
 439                 {
 440                         bits |= U_EFFECTS;
 441                         if (s->effects & 0xFF00)
 442                                 bits |= U_EFFECTS2;
 443                 }
 444                 if (baseline.modelindex != s->modelindex)
 445                 {
 446                         bits |= U_MODEL;
 447                         if (s->modelindex & 0xFF00)
 448                                 bits |= U_MODEL2;
 449                 }
 450                 if (baseline.alpha != s->alpha)
 451                         bits |= U_ALPHA;
 452                 if (baseline.scale != s->scale)
 453                         bits |= U_SCALE;
 454                 if (baseline.glowsize != s->glowsize)
 455                         bits |= U_GLOWSIZE;
 456                 if (baseline.glowcolor != s->glowcolor)
 457                         bits |= U_GLOWCOLOR;
 458
 459                 // if extensions are disabled, clear the relevant update flags
 460                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 461                         bits &= 0x7FFF;
 462                 if (sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 463                         if (s->alpha != 255 || s->effects & EF_FULLBRIGHT)
 464                                 bits |= U_EXTEND1;
 465
 466                 // write the message
 467                 if (bits >= 16777216)
 468                         bits |= U_EXTEND2;
 469                 if (bits >= 65536)
 470                         bits |= U_EXTEND1;
 471                 if (bits >= 256)
 472                         bits |= U_MOREBITS;
 473                 bits |= U_SIGNAL;
 474
 475                 MSG_WriteByte (&buf, bits);
 476                 if (bits & U_MOREBITS)          MSG_WriteByte(&buf, bits>>8);
 477                 if (bits & U_EXTEND1)           MSG_WriteByte(&buf, bits>>16);
 478                 if (bits & U_EXTEND2)           MSG_WriteByte(&buf, bits>>24);
 479                 if (bits & U_LONGENTITY)        MSG_WriteShort(&buf, s->number);
 480                 else                                            MSG_WriteByte(&buf, s->number);
 481
 482                 if (bits & U_MODEL)                     MSG_WriteByte(&buf, s->modelindex);
 483                 if (bits & U_FRAME)                     MSG_WriteByte(&buf, s->frame);
 484                 if (bits & U_COLORMAP)          MSG_WriteByte(&buf, s->colormap);
 485                 if (bits & U_SKIN)                      MSG_WriteByte(&buf, s->skin);
 486                 if (bits & U_EFFECTS)           MSG_WriteByte(&buf, s->effects);
 487                 if (bits & U_ORIGIN1)           MSG_WriteCoord(&buf, s->origin[0], sv.protocol);
 488                 if (bits & U_ANGLE1)            MSG_WriteAngle(&buf, s->angles[0], sv.protocol);
 489                 if (bits & U_ORIGIN2)           MSG_WriteCoord(&buf, s->origin[1], sv.protocol);
 490                 if (bits & U_ANGLE2)            MSG_WriteAngle(&buf, s->angles[1], sv.protocol);
 491                 if (bits & U_ORIGIN3)           MSG_WriteCoord(&buf, s->origin[2], sv.protocol);
 492                 if (bits & U_ANGLE3)            MSG_WriteAngle(&buf, s->angles[2], sv.protocol);
 493                 if (bits & U_ALPHA)                     MSG_WriteByte(&buf, s->alpha);
 494                 if (bits & U_SCALE)                     MSG_WriteByte(&buf, s->scale);
 495                 if (bits & U_EFFECTS2)          MSG_WriteByte(&buf, s->effects >> 8);
 496                 if (bits & U_GLOWSIZE)          MSG_WriteByte(&buf, s->glowsize);
 497                 if (bits & U_GLOWCOLOR)         MSG_WriteByte(&buf, s->glowcolor);
 498                 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);}
 499                 if (bits & U_FRAME2)            MSG_WriteByte(&buf, s->frame >> 8);
 500                 if (bits & U_MODEL2)            MSG_WriteByte(&buf, s->modelindex >> 8);
 501
 502                 // the nasty protocol
 503                 if ((bits & U_EXTEND1) && sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 504                 {
 505                         if (s->effects & EF_FULLBRIGHT)
 506                         {
 507                                 MSG_WriteFloat(&buf, 2); // QSG protocol version
 508                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
 509                                 MSG_WriteFloat(&buf, 1); // fullbright
 510                         }
 511                         else
 512                         {
 513                                 MSG_WriteFloat(&buf, 1); // QSG protocol version
 514                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
 515                         }
 516                 }
 517
 518                 // if the commit is full, we're done this frame
 519                 if (msg->cursize + buf.cursize > msg->maxsize)
 520                 {
 521                         // next frame we will continue where we left off
 522                         break;
 523                 }
 524                 // write the message to the packet
 525                 SZ_Write(msg, buf.data, buf.cursize);
 526         }
 527 }
 528
 529 int EntityState_DeltaBits(const entity_state_t *o, const entity_state_t *n)
 530 {
 531         unsigned int bits;
 532         // if o is not active, delta from default
 533         if (!o->active)
 534                 o = &defaultstate;
 535         bits = 0;
 536         if (fabs(n->origin[0] - o->origin[0]) > (1.0f / 256.0f))
 537                 bits |= E_ORIGIN1;
 538         if (fabs(n->origin[1] - o->origin[1]) > (1.0f / 256.0f))
 539                 bits |= E_ORIGIN2;
 540         if (fabs(n->origin[2] - o->origin[2]) > (1.0f / 256.0f))
 541                 bits |= E_ORIGIN3;
 542         if ((unsigned char) (n->angles[0] * (256.0f / 360.0f)) != (unsigned char) (o->angles[0] * (256.0f / 360.0f)))
 543                 bits |= E_ANGLE1;
 544         if ((unsigned char) (n->angles[1] * (256.0f / 360.0f)) != (unsigned char) (o->angles[1] * (256.0f / 360.0f)))
 545                 bits |= E_ANGLE2;
 546         if ((unsigned char) (n->angles[2] * (256.0f / 360.0f)) != (unsigned char) (o->angles[2] * (256.0f / 360.0f)))
 547                 bits |= E_ANGLE3;
 548         if ((n->modelindex ^ o->modelindex) & 0x00FF)
 549                 bits |= E_MODEL1;
 550         if ((n->modelindex ^ o->modelindex) & 0xFF00)
 551                 bits |= E_MODEL2;
 552         if ((n->frame ^ o->frame) & 0x00FF)
 553                 bits |= E_FRAME1;
 554         if ((n->frame ^ o->frame) & 0xFF00)
 555                 bits |= E_FRAME2;
 556         if ((n->effects ^ o->effects) & 0x00FF)
 557                 bits |= E_EFFECTS1;
 558         if ((n->effects ^ o->effects) & 0xFF00)
 559                 bits |= E_EFFECTS2;
 560         if (n->colormap != o->colormap)
 561                 bits |= E_COLORMAP;
 562         if (n->skin != o->skin)
 563                 bits |= E_SKIN;
 564         if (n->alpha != o->alpha)
 565                 bits |= E_ALPHA;
 566         if (n->scale != o->scale)
 567                 bits |= E_SCALE;
 568         if (n->glowsize != o->glowsize)
 569                 bits |= E_GLOWSIZE;
 570         if (n->glowcolor != o->glowcolor)
 571                 bits |= E_GLOWCOLOR;
 572         if (n->flags != o->flags)
 573                 bits |= E_FLAGS;
 574         if (n->tagindex != o->tagindex || n->tagentity != o->tagentity)
 575                 bits |= E_TAGATTACHMENT;
 576         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])
 577                 bits |= E_LIGHT;
 578         if (n->lightstyle != o->lightstyle)
 579                 bits |= E_LIGHTSTYLE;
 580         if (n->lightpflags != o->lightpflags)
 581                 bits |= E_LIGHTPFLAGS;
 582
 583         if (bits)
 584         {
 585                 if (bits &  0xFF000000)
 586                         bits |= 0x00800000;
 587                 if (bits &  0x00FF0000)
 588                         bits |= 0x00008000;
 589                 if (bits &  0x0000FF00)
 590                         bits |= 0x00000080;
 591         }
 592         return bits;
 593 }
 594
 595 void EntityState_WriteExtendBits(sizebuf_t *msg, unsigned int bits)
 596 {
 597         MSG_WriteByte(msg, bits & 0xFF);
 598         if (bits & 0x00000080)
 599         {
 600                 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
 601                 if (bits & 0x00008000)
 602                 {
 603                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
 604                         if (bits & 0x00800000)
 605                                 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
 606                 }
 607         }
 608 }
 609
 610 void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned int bits)
 611 {
 612         if (sv.protocol == PROTOCOL_DARKPLACES2)
 613         {
 614                 if (bits & E_ORIGIN1)
 615                         MSG_WriteCoord16i(msg, ent->origin[0]);
 616                 if (bits & E_ORIGIN2)
 617                         MSG_WriteCoord16i(msg, ent->origin[1]);
 618                 if (bits & E_ORIGIN3)
 619                         MSG_WriteCoord16i(msg, ent->origin[2]);
 620         }
 621         else
 622         {
 623                 // LordHavoc: have to write flags first, as they can modify protocol
 624                 if (bits & E_FLAGS)
 625                         MSG_WriteByte(msg, ent->flags);
 626                 if (ent->flags & RENDER_LOWPRECISION)
 627                 {
 628                         if (bits & E_ORIGIN1)
 629                                 MSG_WriteCoord16i(msg, ent->origin[0]);
 630                         if (bits & E_ORIGIN2)
 631                                 MSG_WriteCoord16i(msg, ent->origin[1]);
 632                         if (bits & E_ORIGIN3)
 633                                 MSG_WriteCoord16i(msg, ent->origin[2]);
 634                 }
 635                 else
 636                 {
 637                         if (bits & E_ORIGIN1)
 638                                 MSG_WriteCoord32f(msg, ent->origin[0]);
 639                         if (bits & E_ORIGIN2)
 640                                 MSG_WriteCoord32f(msg, ent->origin[1]);
 641                         if (bits & E_ORIGIN3)
 642                                 MSG_WriteCoord32f(msg, ent->origin[2]);
 643                 }
 644         }
 645         if ((sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4) && (ent->flags & RENDER_LOWPRECISION))
 646         {
 647                 if (bits & E_ANGLE1)
 648                         MSG_WriteAngle8i(msg, ent->angles[0]);
 649                 if (bits & E_ANGLE2)
 650                         MSG_WriteAngle8i(msg, ent->angles[1]);
 651                 if (bits & E_ANGLE3)
 652                         MSG_WriteAngle8i(msg, ent->angles[2]);
 653         }
 654         else
 655         {
 656                 if (bits & E_ANGLE1)
 657                         MSG_WriteAngle16i(msg, ent->angles[0]);
 658                 if (bits & E_ANGLE2)
 659                         MSG_WriteAngle16i(msg, ent->angles[1]);
 660                 if (bits & E_ANGLE3)
 661                         MSG_WriteAngle16i(msg, ent->angles[2]);
 662         }
 663         if (bits & E_MODEL1)
 664                 MSG_WriteByte(msg, ent->modelindex & 0xFF);
 665         if (bits & E_MODEL2)
 666                 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
 667         if (bits & E_FRAME1)
 668                 MSG_WriteByte(msg, ent->frame & 0xFF);
 669         if (bits & E_FRAME2)
 670                 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
 671         if (bits & E_EFFECTS1)
 672                 MSG_WriteByte(msg, ent->effects & 0xFF);
 673         if (bits & E_EFFECTS2)
 674                 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
 675         if (bits & E_COLORMAP)
 676                 MSG_WriteByte(msg, ent->colormap);
 677         if (bits & E_SKIN)
 678                 MSG_WriteByte(msg, ent->skin);
 679         if (bits & E_ALPHA)
 680                 MSG_WriteByte(msg, ent->alpha);
 681         if (bits & E_SCALE)
 682                 MSG_WriteByte(msg, ent->scale);
 683         if (bits & E_GLOWSIZE)
 684                 MSG_WriteByte(msg, ent->glowsize);
 685         if (bits & E_GLOWCOLOR)
 686                 MSG_WriteByte(msg, ent->glowcolor);
 687         if (sv.protocol == PROTOCOL_DARKPLACES2)
 688                 if (bits & E_FLAGS)
 689                         MSG_WriteByte(msg, ent->flags);
 690         if (bits & E_TAGATTACHMENT)
 691         {
 692                 MSG_WriteShort(msg, ent->tagentity);
 693                 MSG_WriteByte(msg, ent->tagindex);
 694         }
 695         if (bits & E_LIGHT)
 696         {
 697                 MSG_WriteShort(msg, ent->light[0]);
 698                 MSG_WriteShort(msg, ent->light[1]);
 699                 MSG_WriteShort(msg, ent->light[2]);
 700                 MSG_WriteShort(msg, ent->light[3]);
 701         }
 702         if (bits & E_LIGHTSTYLE)
 703                 MSG_WriteByte(msg, ent->lightstyle);
 704         if (bits & E_LIGHTPFLAGS)
 705                 MSG_WriteByte(msg, ent->lightpflags);
 706 }
 707
 708 void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
 709 {
 710         unsigned int bits;
 711         if (ent->active)
 712         {
 713                 // entity is active, check for changes from the delta
 714                 if ((bits = EntityState_DeltaBits(delta, ent)))
 715                 {
 716                         // write the update number, bits, and fields
 717                         MSG_WriteShort(msg, ent->number);
 718                         EntityState_WriteExtendBits(msg, bits);
 719                         EntityState_WriteFields(ent, msg, bits);
 720                 }
 721         }
 722         else
 723         {
 724                 // entity is inactive, check if the delta was active
 725                 if (delta->active)
 726                 {
 727                         // write the remove number
 728                         MSG_WriteShort(msg, ent->number | 0x8000);
 729                 }
 730         }
 731 }
 732
 733 int EntityState_ReadExtendBits(void)
 734 {
 735         unsigned int bits;
 736         bits = MSG_ReadByte();
 737         if (bits & 0x00000080)
 738         {
 739                 bits |= MSG_ReadByte() << 8;
 740                 if (bits & 0x00008000)
 741                 {
 742                         bits |= MSG_ReadByte() << 16;
 743                         if (bits & 0x00800000)
 744                                 bits |= MSG_ReadByte() << 24;
 745                 }
 746         }
 747         return bits;
 748 }
 749
 750 void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
 751 {
 752         if (cls.protocol == PROTOCOL_DARKPLACES2)
 753         {
 754                 if (bits & E_ORIGIN1)
 755                         e->origin[0] = MSG_ReadCoord16i();
 756                 if (bits & E_ORIGIN2)
 757                         e->origin[1] = MSG_ReadCoord16i();
 758                 if (bits & E_ORIGIN3)
 759                         e->origin[2] = MSG_ReadCoord16i();
 760         }
 761         else
 762         {
 763                 if (bits & E_FLAGS)
 764                         e->flags = MSG_ReadByte();
 765                 if (e->flags & RENDER_LOWPRECISION)
 766                 {
 767                         if (bits & E_ORIGIN1)
 768                                 e->origin[0] = MSG_ReadCoord16i();
 769                         if (bits & E_ORIGIN2)
 770                                 e->origin[1] = MSG_ReadCoord16i();
 771                         if (bits & E_ORIGIN3)
 772                                 e->origin[2] = MSG_ReadCoord16i();
 773                 }
 774                 else
 775                 {
 776                         if (bits & E_ORIGIN1)
 777                                 e->origin[0] = MSG_ReadCoord32f();
 778                         if (bits & E_ORIGIN2)
 779                                 e->origin[1] = MSG_ReadCoord32f();
 780                         if (bits & E_ORIGIN3)
 781                                 e->origin[2] = MSG_ReadCoord32f();
 782                 }
 783         }
 784         if ((cls.protocol == PROTOCOL_DARKPLACES5 || cls.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
 785         {
 786                 if (bits & E_ANGLE1)
 787                         e->angles[0] = MSG_ReadAngle16i();
 788                 if (bits & E_ANGLE2)
 789                         e->angles[1] = MSG_ReadAngle16i();
 790                 if (bits & E_ANGLE3)
 791                         e->angles[2] = MSG_ReadAngle16i();
 792         }
 793         else
 794         {
 795                 if (bits & E_ANGLE1)
 796                         e->angles[0] = MSG_ReadAngle8i();
 797                 if (bits & E_ANGLE2)
 798                         e->angles[1] = MSG_ReadAngle8i();
 799                 if (bits & E_ANGLE3)
 800                         e->angles[2] = MSG_ReadAngle8i();
 801         }
 802         if (bits & E_MODEL1)
 803                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
 804         if (bits & E_MODEL2)
 805                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 806         if (bits & E_FRAME1)
 807                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
 808         if (bits & E_FRAME2)
 809                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 810         if (bits & E_EFFECTS1)
 811                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
 812         if (bits & E_EFFECTS2)
 813                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 814         if (bits & E_COLORMAP)
 815                 e->colormap = MSG_ReadByte();
 816         if (bits & E_SKIN)
 817                 e->skin = MSG_ReadByte();
 818         if (bits & E_ALPHA)
 819                 e->alpha = MSG_ReadByte();
 820         if (bits & E_SCALE)
 821                 e->scale = MSG_ReadByte();
 822         if (bits & E_GLOWSIZE)
 823                 e->glowsize = MSG_ReadByte();
 824         if (bits & E_GLOWCOLOR)
 825                 e->glowcolor = MSG_ReadByte();
 826         if (cls.protocol == PROTOCOL_DARKPLACES2)
 827                 if (bits & E_FLAGS)
 828                         e->flags = MSG_ReadByte();
 829         if (bits & E_TAGATTACHMENT)
 830         {
 831                 e->tagentity = (unsigned short) MSG_ReadShort();
 832                 e->tagindex = MSG_ReadByte();
 833         }
 834         if (bits & E_LIGHT)
 835         {
 836                 e->light[0] = (unsigned short) MSG_ReadShort();
 837                 e->light[1] = (unsigned short) MSG_ReadShort();
 838                 e->light[2] = (unsigned short) MSG_ReadShort();
 839                 e->light[3] = (unsigned short) MSG_ReadShort();
 840         }
 841         if (bits & E_LIGHTSTYLE)
 842                 e->lightstyle = MSG_ReadByte();
 843         if (bits & E_LIGHTPFLAGS)
 844                 e->lightpflags = MSG_ReadByte();
 845
 846         if (developer_networkentities.integer >= 2)
 847         {
 848                 Con_Printf("ReadFields e%i", e->number);
 849
 850                 if (bits & E_ORIGIN1)
 851                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
 852                 if (bits & E_ORIGIN2)
 853                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
 854                 if (bits & E_ORIGIN3)
 855                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
 856                 if (bits & E_ANGLE1)
 857                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
 858                 if (bits & E_ANGLE2)
 859                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
 860                 if (bits & E_ANGLE3)
 861                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
 862                 if (bits & (E_MODEL1 | E_MODEL2))
 863                         Con_Printf(" E_MODEL %i", e->modelindex);
 864
 865                 if (bits & (E_FRAME1 | E_FRAME2))
 866                         Con_Printf(" E_FRAME %i", e->frame);
 867                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
 868                         Con_Printf(" E_EFFECTS %i", e->effects);
 869                 if (bits & E_ALPHA)
 870                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
 871                 if (bits & E_SCALE)
 872                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
 873                 if (bits & E_COLORMAP)
 874                         Con_Printf(" E_COLORMAP %i", e->colormap);
 875                 if (bits & E_SKIN)
 876                         Con_Printf(" E_SKIN %i", e->skin);
 877
 878                 if (bits & E_GLOWSIZE)
 879                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
 880                 if (bits & E_GLOWCOLOR)
 881                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
 882
 883                 if (bits & E_LIGHT)
 884                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
 885                 if (bits & E_LIGHTPFLAGS)
 886                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
 887
 888                 if (bits & E_TAGATTACHMENT)
 889                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
 890                 if (bits & E_LIGHTSTYLE)
 891                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
 892                 Con_Print("\n");
 893         }
 894 }
 895
 896 // (client and server) allocates a new empty database
 897 entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
 898 {
 899         return (entityframe_database_t *)Mem_Alloc(mempool, sizeof(entityframe_database_t));
 900 }
 901
 902 // (client and server) frees the database
 903 void EntityFrame_FreeDatabase(entityframe_database_t *d)
 904 {
 905         Mem_Free(d);
 906 }
 907
 908 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
 909 void EntityFrame_ClearDatabase(entityframe_database_t *d)
 910 {
 911         memset(d, 0, sizeof(*d));
 912 }
 913
 914 // (server and client) removes frames older than 'frame' from database
 915 void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
 916 {
 917         int i;
 918         d->ackframenum = frame;
 919         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
 920         // ignore outdated frame acks (out of order packets)
 921         if (i == 0)
 922                 return;
 923         d->numframes -= i;
 924         // if some queue is left, slide it down to beginning of array
 925         if (d->numframes)
 926                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
 927 }
 928
 929 // (server) clears frame, to prepare for adding entities
 930 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
 931 {
 932         f->time = 0;
 933         f->framenum = framenum;
 934         f->numentities = 0;
 935         if (eye == NULL)
 936                 VectorClear(f->eye);
 937         else
 938                 VectorCopy(eye, f->eye);
 939 }
 940
 941 // (server and client) reads a frame from the database
 942 void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
 943 {
 944         int i, n;
 945         EntityFrame_Clear(f, NULL, -1);
 946         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
 947         if (i < d->numframes && framenum == d->frames[i].framenum)
 948         {
 949                 f->framenum = framenum;
 950                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
 951                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
 952                 if (n > f->numentities)
 953                         n = f->numentities;
 954                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
 955                 if (f->numentities > n)
 956                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
 957                 VectorCopy(d->eye, f->eye);
 958         }
 959 }
 960
 961 // (server and client) adds a entity_frame to the database, for future reference
 962 void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
 963 {
 964         int n, e;
 965         entity_frameinfo_t *info;
 966
 967         VectorCopy(eye, d->eye);
 968
 969         // figure out how many entity slots are used already
 970         if (d->numframes)
 971         {
 972                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
 973                 if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
 974                 {
 975                         // ran out of room, dump database
 976                         EntityFrame_ClearDatabase(d);
 977                 }
 978         }
 979
 980         info = &d->frames[d->numframes];
 981         info->framenum = framenum;
 982         e = -1000;
 983         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
 984         for (n = 0;n <= d->numframes;n++)
 985         {
 986                 if (e >= d->frames[n].framenum)
 987                 {
 988                         if (e == framenum)
 989                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
 990                         else
 991                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
 992                         return;
 993                 }
 994                 e = d->frames[n].framenum;
 995         }
 996         // if database still has frames after that...
 997         if (d->numframes)
 998                 info->firstentity = d->frames[d->numframes - 1].endentity;
 999         else
1000                 info->firstentity = 0;
1001         info->endentity = info->firstentity + numentities;
1002         d->numframes++;
1003
1004         n = info->firstentity % MAX_ENTITY_DATABASE;
1005         e = MAX_ENTITY_DATABASE - n;
1006         if (e > numentities)
1007                 e = numentities;
1008         memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
1009         if (numentities > e)
1010                 memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
1011 }
1012
1013 // (server) writes a frame to network stream
1014 void EntityFrame_WriteFrame(sizebuf_t *msg, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
1015 {
1016         int i, onum, number;
1017         entity_frame_t *o = &deltaframe;
1018         const entity_state_t *ent, *delta;
1019         vec3_t eye;
1020         prvm_eval_t *val;
1021
1022         d->latestframenum++;
1023
1024         VectorClear(eye);
1025         for (i = 0;i < numstates;i++)
1026         {
1027                 if (states[i].number == viewentnum)
1028                 {
1029                         VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
1030                         break;
1031                 }
1032         }
1033
1034         EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
1035
1036         EntityFrame_FetchFrame(d, d->ackframenum, o);
1037
1038         MSG_WriteByte (msg, svc_entities);
1039         MSG_WriteLong (msg, o->framenum);
1040         MSG_WriteLong (msg, d->latestframenum);
1041         MSG_WriteFloat (msg, eye[0]);
1042         MSG_WriteFloat (msg, eye[1]);
1043         MSG_WriteFloat (msg, eye[2]);
1044
1045         onum = 0;
1046         for (i = 0;i < numstates;i++)
1047         {
1048                 ent = states + i;
1049                 number = ent->number;
1050
1051                 val = PRVM_GETEDICTFIELDVALUE((&prog->edicts[number]), prog->fieldoffsets.SendEntity);
1052                 if(val && val->function)
1053                                 continue;
1054                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
1055                 {
1056                         // write remove message
1057                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1058                 }
1059                 if (onum < o->numentities && (o->entitydata[onum].number == number))
1060                 {
1061                         // delta from previous frame
1062                         delta = o->entitydata + onum;
1063                         // advance to next entity in delta frame
1064                         onum++;
1065                 }
1066                 else
1067                 {
1068                         // delta from defaults
1069                         delta = &defaultstate;
1070                 }
1071                 EntityState_WriteUpdate(ent, msg, delta);
1072         }
1073         for (;onum < o->numentities;onum++)
1074         {
1075                 // write remove message
1076                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1077         }
1078         MSG_WriteShort(msg, 0xFFFF);
1079 }
1080
1081 // (client) reads a frame from network stream
1082 void EntityFrame_CL_ReadFrame(void)
1083 {
1084         int i, number, removed;
1085         entity_frame_t *f = &framedata, *delta = &deltaframe;
1086         entity_state_t *e, *old, *oldend;
1087         entity_t *ent;
1088         entityframe_database_t *d;
1089         if (!cl.entitydatabase)
1090                 cl.entitydatabase = EntityFrame_AllocDatabase(cls.levelmempool);
1091         d = cl.entitydatabase;
1092
1093         EntityFrame_Clear(f, NULL, -1);
1094
1095         // read the frame header info
1096         f->time = cl.mtime[0];
1097         number = MSG_ReadLong();
1098         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1099                 cl.latestframenums[i] = cl.latestframenums[i+1];
1100         cl.latestframenums[LATESTFRAMENUMS-1] = f->framenum = MSG_ReadLong();
1101         f->eye[0] = MSG_ReadFloat();
1102         f->eye[1] = MSG_ReadFloat();
1103         f->eye[2] = MSG_ReadFloat();
1104         EntityFrame_AckFrame(d, number);
1105         EntityFrame_FetchFrame(d, number, delta);
1106         old = delta->entitydata;
1107         oldend = old + delta->numentities;
1108         // read entities until we hit the magic 0xFFFF end tag
1109         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
1110         {
1111                 if (msg_badread)
1112                         Host_Error("EntityFrame_Read: read error");
1113                 removed = number & 0x8000;
1114                 number &= 0x7FFF;
1115                 if (number >= MAX_EDICTS)
1116                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)", number, MAX_EDICTS);
1117
1118                 // seek to entity, while copying any skipped entities (assume unchanged)
1119                 while (old < oldend && old->number < number)
1120                 {
1121                         if (f->numentities >= MAX_ENTITY_DATABASE)
1122                                 Host_Error("EntityFrame_Read: entity list too big");
1123                         f->entitydata[f->numentities] = *old++;
1124                         f->entitydata[f->numentities++].time = cl.mtime[0];
1125                 }
1126                 if (removed)
1127                 {
1128                         if (old < oldend && old->number == number)
1129                                 old++;
1130                         else
1131                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
1132                 }
1133                 else
1134                 {
1135                         if (f->numentities >= MAX_ENTITY_DATABASE)
1136                                 Host_Error("EntityFrame_Read: entity list too big");
1137
1138                         // reserve this slot
1139                         e = f->entitydata + f->numentities++;
1140
1141                         if (old < oldend && old->number == number)
1142                         {
1143                                 // delta from old entity
1144                                 *e = *old++;
1145                         }
1146                         else
1147                         {
1148                                 // delta from defaults
1149                                 *e = defaultstate;
1150                         }
1151
1152                         if (cl.num_entities <= number)
1153                         {
1154                                 cl.num_entities = number + 1;
1155                                 if (number >= cl.max_entities)
1156                                         CL_ExpandEntities(number);
1157                         }
1158                         cl.entities_active[number] = true;
1159                         e->active = true;
1160                         e->time = cl.mtime[0];
1161                         e->number = number;
1162                         EntityState_ReadFields(e, EntityState_ReadExtendBits());
1163                 }
1164         }
1165         while (old < oldend)
1166         {
1167                 if (f->numentities >= MAX_ENTITY_DATABASE)
1168                         Host_Error("EntityFrame_Read: entity list too big");
1169                 f->entitydata[f->numentities] = *old++;
1170                 f->entitydata[f->numentities++].time = cl.mtime[0];
1171         }
1172         EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
1173
1174         memset(cl.entities_active, 0, cl.num_entities * sizeof(unsigned char));
1175         number = 1;
1176         for (i = 0;i < f->numentities;i++)
1177         {
1178                 for (;number < f->entitydata[i].number && number < cl.num_entities;number++)
1179                 {
1180                         if (cl.entities_active[number])
1181                         {
1182                                 cl.entities_active[number] = false;
1183                                 cl.entities[number].state_current.active = false;
1184                         }
1185                 }
1186                 if (number >= cl.num_entities)
1187                         break;
1188                 // update the entity
1189                 ent = &cl.entities[number];
1190                 ent->state_previous = ent->state_current;
1191                 ent->state_current = f->entitydata[i];
1192                 CL_MoveLerpEntityStates(ent);
1193                 // the entity lives again...
1194                 cl.entities_active[number] = true;
1195                 number++;
1196         }
1197         for (;number < cl.num_entities;number++)
1198         {
1199                 if (cl.entities_active[number])
1200                 {
1201                         cl.entities_active[number] = false;
1202                         cl.entities[number].state_current.active = false;
1203                 }
1204         }
1205 }
1206
1207
1208 // (client) returns the frame number of the most recent frame recieved
1209 int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
1210 {
1211         if (d->numframes)
1212                 return d->frames[d->numframes - 1].framenum;
1213         else
1214                 return -1;
1215 }
1216
1217
1218
1219
1220
1221
1222 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
1223 {
1224         if (d->maxreferenceentities <= number)
1225         {
1226                 int oldmax = d->maxreferenceentities;
1227                 entity_state_t *oldentity = d->referenceentity;
1228                 d->maxreferenceentities = (number + 15) & ~7;
1229                 d->referenceentity = (entity_state_t *)Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
1230                 if (oldentity)
1231                 {
1232                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
1233                         Mem_Free(oldentity);
1234                 }
1235                 // clear the newly created entities
1236                 for (;oldmax < d->maxreferenceentities;oldmax++)
1237                 {
1238                         d->referenceentity[oldmax] = defaultstate;
1239                         d->referenceentity[oldmax].number = oldmax;
1240                 }
1241         }
1242         return d->referenceentity + number;
1243 }
1244
1245 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
1246 {
1247         // resize commit's entity list if full
1248         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
1249         {
1250                 entity_state_t *oldentity = d->currentcommit->entity;
1251                 d->currentcommit->maxentities += 8;
1252                 d->currentcommit->entity = (entity_state_t *)Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
1253                 if (oldentity)
1254                 {
1255                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
1256                         Mem_Free(oldentity);
1257                 }
1258         }
1259         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
1260 }
1261
1262 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
1263 {
1264         entityframe4_database_t *d;
1265         d = (entityframe4_database_t *)Mem_Alloc(pool, sizeof(*d));
1266         d->mempool = pool;
1267         EntityFrame4_ResetDatabase(d);
1268         return d;
1269 }
1270
1271 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
1272 {
1273         int i;
1274         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1275                 if (d->commit[i].entity)
1276                         Mem_Free(d->commit[i].entity);
1277         if (d->referenceentity)
1278                 Mem_Free(d->referenceentity);
1279         Mem_Free(d);
1280 }
1281
1282 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
1283 {
1284         int i;
1285         d->referenceframenum = -1;
1286         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1287                 d->commit[i].numentities = 0;
1288         for (i = 0;i < d->maxreferenceentities;i++)
1289                 d->referenceentity[i] = defaultstate;
1290 }
1291
1292 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
1293 {
1294         int i, j, found;
1295         entity_database4_commit_t *commit;
1296         if (framenum == -1)
1297         {
1298                 // reset reference, but leave commits alone
1299                 d->referenceframenum = -1;
1300                 for (i = 0;i < d->maxreferenceentities;i++)
1301                         d->referenceentity[i] = defaultstate;
1302                 // if this is the server, remove commits
1303                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1304                                 commit->numentities = 0;
1305                 found = true;
1306         }
1307         else if (d->referenceframenum == framenum)
1308                 found = true;
1309         else
1310         {
1311                 found = false;
1312                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1313                 {
1314                         if (commit->numentities && commit->framenum <= framenum)
1315                         {
1316                                 if (commit->framenum == framenum)
1317                                 {
1318                                         found = true;
1319                                         d->referenceframenum = framenum;
1320                                         if (developer_networkentities.integer >= 3)
1321                                         {
1322                                                 for (j = 0;j < commit->numentities;j++)
1323                                                 {
1324                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
1325                                                         if (commit->entity[j].active != s->active)
1326                                                         {
1327                                                                 if (commit->entity[j].active)
1328                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1329                                                                 else
1330                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1331                                                         }
1332                                                         *s = commit->entity[j];
1333                                                 }
1334                                         }
1335                                         else
1336                                                 for (j = 0;j < commit->numentities;j++)
1337                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
1338                                 }
1339                                 commit->numentities = 0;
1340                         }
1341                 }
1342         }
1343         if (developer_networkentities.integer >= 1)
1344         {
1345                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
1346                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1347                         if (d->commit[i].numentities)
1348                                 Con_Printf(" %i", d->commit[i].framenum);
1349                 Con_Print("\n");
1350         }
1351         return found;
1352 }
1353
1354 void EntityFrame4_CL_ReadFrame(void)
1355 {
1356         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
1357         entity_state_t *s;
1358         entityframe4_database_t *d;
1359         if (!cl.entitydatabase4)
1360                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cls.levelmempool);
1361         d = cl.entitydatabase4;
1362         // read the number of the frame this refers to
1363         referenceframenum = MSG_ReadLong();
1364         // read the number of this frame
1365         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1366                 cl.latestframenums[i] = cl.latestframenums[i+1];
1367         cl.latestframenums[LATESTFRAMENUMS-1] = framenum = MSG_ReadLong();
1368         // read the start number
1369         enumber = (unsigned short) MSG_ReadShort();
1370         if (developer_networkentities.integer >= 1)
1371         {
1372                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
1373                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1374                         if (d->commit[i].numentities)
1375                                 Con_Printf(" %i", d->commit[i].framenum);
1376                 Con_Print("\n");
1377         }
1378         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
1379         {
1380                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
1381                 skip = true;
1382         }
1383         d->currentcommit = NULL;
1384         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1385         {
1386                 if (!d->commit[i].numentities)
1387                 {
1388                         d->currentcommit = d->commit + i;
1389                         d->currentcommit->framenum = framenum;
1390                         d->currentcommit->numentities = 0;
1391                 }
1392         }
1393         if (d->currentcommit == NULL)
1394         {
1395                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
1396                 skip = true;
1397         }
1398         done = false;
1399         while (!done && !msg_badread)
1400         {
1401                 // read the number of the modified entity
1402                 // (gaps will be copied unmodified)
1403                 n = (unsigned short)MSG_ReadShort();
1404                 if (n == 0x8000)
1405                 {
1406                         // no more entities in this update, but we still need to copy the
1407                         // rest of the reference entities (final gap)
1408                         done = true;
1409                         // read end of range number, then process normally
1410                         n = (unsigned short)MSG_ReadShort();
1411                 }
1412                 // high bit means it's a remove message
1413                 cnumber = n & 0x7FFF;
1414                 // if this is a live entity we may need to expand the array
1415                 if (cl.num_entities <= cnumber && !(n & 0x8000))
1416                 {
1417                         cl.num_entities = cnumber + 1;
1418                         if (cnumber >= cl.max_entities)
1419                                 CL_ExpandEntities(cnumber);
1420                 }
1421                 // add one (the changed one) if not done
1422                 stopnumber = cnumber + !done;
1423                 // process entities in range from the last one to the changed one
1424                 for (;enumber < stopnumber;enumber++)
1425                 {
1426                         if (skip || enumber >= cl.num_entities)
1427                         {
1428                                 if (enumber == cnumber && (n & 0x8000) == 0)
1429                                 {
1430                                         entity_state_t tempstate;
1431                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
1432                                 }
1433                                 continue;
1434                         }
1435                         // slide the current into the previous slot
1436                         cl.entities[enumber].state_previous = cl.entities[enumber].state_current;
1437                         // copy a new current from reference database
1438                         cl.entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
1439                         s = &cl.entities[enumber].state_current;
1440                         // if this is the one to modify, read more data...
1441                         if (enumber == cnumber)
1442                         {
1443                                 if (n & 0x8000)
1444                                 {
1445                                         // simply removed
1446                                         if (developer_networkentities.integer >= 2)
1447                                                 Con_Printf("entity %i: remove\n", enumber);
1448                                         *s = defaultstate;
1449                                 }
1450                                 else
1451                                 {
1452                                         // read the changes
1453                                         if (developer_networkentities.integer >= 2)
1454                                                 Con_Printf("entity %i: update\n", enumber);
1455                                         s->active = true;
1456                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
1457                                 }
1458                         }
1459                         else if (developer_networkentities.integer >= 4)
1460                                 Con_Printf("entity %i: copy\n", enumber);
1461                         // set the cl.entities_active flag
1462                         cl.entities_active[enumber] = s->active;
1463                         // set the update time
1464                         s->time = cl.mtime[0];
1465                         // fix the number (it gets wiped occasionally by copying from defaultstate)
1466                         s->number = enumber;
1467                         // check if we need to update the lerp stuff
1468                         if (s->active)
1469                                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
1470                         // add this to the commit entry whether it is modified or not
1471                         if (d->currentcommit)
1472                                 EntityFrame4_AddCommitEntity(d, &cl.entities[enumber].state_current);
1473                         // print extra messages if desired
1474                         if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
1475                         {
1476                                 if (cl.entities[enumber].state_current.active)
1477                                         Con_Printf("entity #%i has become active\n", enumber);
1478                                 else if (cl.entities[enumber].state_previous.active)
1479                                         Con_Printf("entity #%i has become inactive\n", enumber);
1480                         }
1481                 }
1482         }
1483         d->currentcommit = NULL;
1484         if (skip)
1485                 EntityFrame4_ResetDatabase(d);
1486 }
1487
1488 void EntityFrame4_WriteFrame(sizebuf_t *msg, entityframe4_database_t *d, int numstates, const entity_state_t *states)
1489 {
1490         const entity_state_t *e, *s;
1491         entity_state_t inactiveentitystate;
1492         int i, n, startnumber;
1493         sizebuf_t buf;
1494         unsigned char data[128];
1495         prvm_eval_t *val;
1496
1497         // if there isn't enough space to accomplish anything, skip it
1498         if (msg->cursize + 24 > msg->maxsize)
1499                 return;
1500
1501         // prepare the buffer
1502         memset(&buf, 0, sizeof(buf));
1503         buf.data = data;
1504         buf.maxsize = sizeof(data);
1505
1506         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1507                 if (!d->commit[i].numentities)
1508                         break;
1509         // if commit buffer full, just don't bother writing an update this frame
1510         if (i == MAX_ENTITY_HISTORY)
1511                 return;
1512         d->currentcommit = d->commit + i;
1513
1514         // this state's number gets played around with later
1515         inactiveentitystate = defaultstate;
1516
1517         d->currentcommit->numentities = 0;
1518         d->currentcommit->framenum = ++d->latestframenumber;
1519         MSG_WriteByte(msg, svc_entities);
1520         MSG_WriteLong(msg, d->referenceframenum);
1521         MSG_WriteLong(msg, d->currentcommit->framenum);
1522         if (developer_networkentities.integer >= 1)
1523         {
1524                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
1525                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1526                         if (d->commit[i].numentities)
1527                                 Con_Printf(" %i", d->commit[i].framenum);
1528                 Con_Print(")\n");
1529         }
1530         if (d->currententitynumber >= prog->max_edicts)
1531                 startnumber = 1;
1532         else
1533                 startnumber = bound(1, d->currententitynumber, prog->max_edicts - 1);
1534         MSG_WriteShort(msg, startnumber);
1535         // reset currententitynumber so if the loop does not break it we will
1536         // start at beginning next frame (if it does break, it will set it)
1537         d->currententitynumber = 1;
1538         for (i = 0, n = startnumber;n < prog->max_edicts;n++)
1539         {
1540                 val = PRVM_GETEDICTFIELDVALUE((&prog->edicts[n]), prog->fieldoffsets.SendEntity);
1541                 if(val && val->function)
1542                         continue;
1543                 // find the old state to delta from
1544                 e = EntityFrame4_GetReferenceEntity(d, n);
1545                 // prepare the buffer
1546                 SZ_Clear(&buf);
1547                 // entity exists, build an update (if empty there is no change)
1548                 // find the state in the list
1549                 for (;i < numstates && states[i].number < n;i++);
1550                 // make the message
1551                 s = states + i;
1552                 if (s->number == n)
1553                 {
1554                         // build the update
1555                         EntityState_WriteUpdate(s, &buf, e);
1556                 }
1557                 else
1558                 {
1559                         inactiveentitystate.number = n;
1560                         s = &inactiveentitystate;
1561                         if (e->active)
1562                         {
1563                                 // entity used to exist but doesn't anymore, send remove
1564                                 MSG_WriteShort(&buf, n | 0x8000);
1565                         }
1566                 }
1567                 // if the commit is full, we're done this frame
1568                 if (msg->cursize + buf.cursize > msg->maxsize - 4)
1569                 {
1570                         // next frame we will continue where we left off
1571                         break;
1572                 }
1573                 // add the entity to the commit
1574                 EntityFrame4_AddCommitEntity(d, s);
1575                 // if the message is empty, skip out now
1576                 if (buf.cursize)
1577                 {
1578                         // write the message to the packet
1579                         SZ_Write(msg, buf.data, buf.cursize);
1580                 }
1581         }
1582         d->currententitynumber = n;
1583
1584         // remove world message (invalid, and thus a good terminator)
1585         MSG_WriteShort(msg, 0x8000);
1586         // write the number of the end entity
1587         MSG_WriteShort(msg, d->currententitynumber);
1588         // just to be sure
1589         d->currentcommit = NULL;
1590 }
1591
1592
1593
1594
1595 entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
1596 {
1597         int i;
1598         entityframe5_database_t *d;
1599         d = (entityframe5_database_t *)Mem_Alloc(pool, sizeof(*d));
1600         d->latestframenum = 0;
1601         for (i = 0;i < d->maxedicts;i++)
1602                 d->states[i] = defaultstate;
1603         return d;
1604 }
1605
1606 void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
1607 {
1608         // all the [maxedicts] memory is allocated at once, so there's only one
1609         // thing to free
1610         if (d->maxedicts)
1611                 Mem_Free(d->deltabits);
1612         Mem_Free(d);
1613 }
1614
1615 void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
1616 {
1617         if (d->maxedicts < newmax)
1618         {
1619                 unsigned char *data;
1620                 int oldmaxedicts = d->maxedicts;
1621                 int *olddeltabits = d->deltabits;
1622                 unsigned char *oldpriorities = d->priorities;
1623                 int *oldupdateframenum = d->updateframenum;
1624                 entity_state_t *oldstates = d->states;
1625                 unsigned char *oldvisiblebits = d->visiblebits;
1626                 d->maxedicts = newmax;
1627                 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));
1628                 d->deltabits = (int *)data;data += d->maxedicts * sizeof(int);
1629                 d->priorities = (unsigned char *)data;data += d->maxedicts * sizeof(unsigned char);
1630                 d->updateframenum = (int *)data;data += d->maxedicts * sizeof(int);
1631                 d->states = (entity_state_t *)data;data += d->maxedicts * sizeof(entity_state_t);
1632                 d->visiblebits = (unsigned char *)data;data += (d->maxedicts+7)/8 * sizeof(unsigned char);
1633                 if (oldmaxedicts)
1634                 {
1635                         memcpy(d->deltabits, olddeltabits, oldmaxedicts * sizeof(int));
1636                         memcpy(d->priorities, oldpriorities, oldmaxedicts * sizeof(unsigned char));
1637                         memcpy(d->updateframenum, oldupdateframenum, oldmaxedicts * sizeof(int));
1638                         memcpy(d->states, oldstates, oldmaxedicts * sizeof(entity_state_t));
1639                         memcpy(d->visiblebits, oldvisiblebits, (oldmaxedicts+7)/8 * sizeof(unsigned char));
1640                         // the previous buffers were a single allocation, so just one free
1641                         Mem_Free(olddeltabits);
1642                 }
1643         }
1644 }
1645
1646 int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
1647 {
1648         int limit, priority;
1649         entity_state_t *s;
1650         // if it is the player, update urgently
1651         if (stateindex == d->viewentnum)
1652                 return E5_PROTOCOL_PRIORITYLEVELS - 1;
1653         // priority increases each frame no matter what happens
1654         priority = d->priorities[stateindex] + 1;
1655         // players get an extra priority boost
1656         if (stateindex <= svs.maxclients)
1657                 priority++;
1658         // remove dead entities very quickly because they are just 2 bytes
1659         if (!d->states[stateindex].active)
1660         {
1661                 priority++;
1662                 return bound(1, priority, E5_PROTOCOL_PRIORITYLEVELS - 1);
1663         }
1664         // certain changes are more noticable than others
1665         if (d->deltabits[stateindex] & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
1666                 priority++;
1667         // find the root entity this one is attached to, and judge relevance by it
1668         for (limit = 0;limit < 256;limit++)
1669         {
1670                 s = d->states + stateindex;
1671                 if (s->flags & RENDER_VIEWMODEL)
1672                         stateindex = d->viewentnum;
1673                 else if (s->tagentity)
1674                         stateindex = s->tagentity;
1675                 else
1676                         break;
1677                 if (d->maxedicts < stateindex)
1678                         EntityFrame5_ExpandEdicts(d, (stateindex+256)&~255);
1679         }
1680         if (limit >= 256)
1681                 Con_DPrintf("Protocol: Runaway loop recursing tagentity links on entity %i\n", stateindex);
1682         // now that we have the parent entity we can make some decisions based on
1683         // distance from the player
1684         if (VectorDistance(d->states[d->viewentnum].origin, s->origin) < 1024.0f)
1685                 priority++;
1686         return bound(1, priority, E5_PROTOCOL_PRIORITYLEVELS - 1);
1687 }
1688
1689 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
1690 {
1691         unsigned int bits = 0;
1692
1693         prvm_eval_t *val;
1694         val = PRVM_GETEDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
1695         if(val && val->function)
1696                 return;
1697
1698         if (!s->active)
1699                 MSG_WriteShort(msg, number | 0x8000);
1700         else
1701         {
1702                 bits = changedbits;
1703                 if ((bits & E5_ORIGIN) && (!(s->flags & RENDER_LOWPRECISION) || s->origin[0] < -4096 || s->origin[0] >= 4096 || s->origin[1] < -4096 || s->origin[1] >= 4096 || s->origin[2] < -4096 || s->origin[2] >= 4096))
1704                         bits |= E5_ORIGIN32;
1705                 if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
1706                         bits |= E5_ANGLES16;
1707                 if ((bits & E5_MODEL) && s->modelindex >= 256)
1708                         bits |= E5_MODEL16;
1709                 if ((bits & E5_FRAME) && s->frame >= 256)
1710                         bits |= E5_FRAME16;
1711                 if (bits & E5_EFFECTS)
1712                 {
1713                         if (s->effects >= 65536)
1714                                 bits |= E5_EFFECTS32;
1715                         else if (s->effects >= 256)
1716                                 bits |= E5_EFFECTS16;
1717                 }
1718                 if (bits >= 256)
1719                         bits |= E5_EXTEND1;
1720                 if (bits >= 65536)
1721                         bits |= E5_EXTEND2;
1722                 if (bits >= 16777216)
1723                         bits |= E5_EXTEND3;
1724                 MSG_WriteShort(msg, number);
1725                 MSG_WriteByte(msg, bits & 0xFF);
1726                 if (bits & E5_EXTEND1)
1727                         MSG_WriteByte(msg, (bits >> 8) & 0xFF);
1728                 if (bits & E5_EXTEND2)
1729                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
1730                 if (bits & E5_EXTEND3)
1731                         MSG_WriteByte(msg, (bits >> 24) & 0xFF);
1732                 if (bits & E5_FLAGS)
1733                         MSG_WriteByte(msg, s->flags);
1734                 if (bits & E5_ORIGIN)
1735                 {
1736                         if (bits & E5_ORIGIN32)
1737                         {
1738                                 MSG_WriteCoord32f(msg, s->origin[0]);
1739                                 MSG_WriteCoord32f(msg, s->origin[1]);
1740                                 MSG_WriteCoord32f(msg, s->origin[2]);
1741                         }
1742                         else
1743                         {
1744                                 MSG_WriteCoord13i(msg, s->origin[0]);
1745                                 MSG_WriteCoord13i(msg, s->origin[1]);
1746                                 MSG_WriteCoord13i(msg, s->origin[2]);
1747                         }
1748                 }
1749                 if (bits & E5_ANGLES)
1750                 {
1751                         if (bits & E5_ANGLES16)
1752                         {
1753                                 MSG_WriteAngle16i(msg, s->angles[0]);
1754                                 MSG_WriteAngle16i(msg, s->angles[1]);
1755                                 MSG_WriteAngle16i(msg, s->angles[2]);
1756                         }
1757                         else
1758                         {
1759                                 MSG_WriteAngle8i(msg, s->angles[0]);
1760                                 MSG_WriteAngle8i(msg, s->angles[1]);
1761                                 MSG_WriteAngle8i(msg, s->angles[2]);
1762                         }
1763                 }
1764                 if (bits & E5_MODEL)
1765                 {
1766                         if (bits & E5_MODEL16)
1767                                 MSG_WriteShort(msg, s->modelindex);
1768                         else
1769                                 MSG_WriteByte(msg, s->modelindex);
1770                 }
1771                 if (bits & E5_FRAME)
1772                 {
1773                         if (bits & E5_FRAME16)
1774                                 MSG_WriteShort(msg, s->frame);
1775                         else
1776                                 MSG_WriteByte(msg, s->frame);
1777                 }
1778                 if (bits & E5_SKIN)
1779                         MSG_WriteByte(msg, s->skin);
1780                 if (bits & E5_EFFECTS)
1781                 {
1782                         if (bits & E5_EFFECTS32)
1783                                 MSG_WriteLong(msg, s->effects);
1784                         else if (bits & E5_EFFECTS16)
1785                                 MSG_WriteShort(msg, s->effects);
1786                         else
1787                                 MSG_WriteByte(msg, s->effects);
1788                 }
1789                 if (bits & E5_ALPHA)
1790                         MSG_WriteByte(msg, s->alpha);
1791                 if (bits & E5_SCALE)
1792                         MSG_WriteByte(msg, s->scale);
1793                 if (bits & E5_COLORMAP)
1794                         MSG_WriteByte(msg, s->colormap);
1795                 if (bits & E5_ATTACHMENT)
1796                 {
1797                         MSG_WriteShort(msg, s->tagentity);
1798                         MSG_WriteByte(msg, s->tagindex);
1799                 }
1800                 if (bits & E5_LIGHT)
1801                 {
1802                         MSG_WriteShort(msg, s->light[0]);
1803                         MSG_WriteShort(msg, s->light[1]);
1804                         MSG_WriteShort(msg, s->light[2]);
1805                         MSG_WriteShort(msg, s->light[3]);
1806                         MSG_WriteByte(msg, s->lightstyle);
1807                         MSG_WriteByte(msg, s->lightpflags);
1808                 }
1809                 if (bits & E5_GLOW)
1810                 {
1811                         MSG_WriteByte(msg, s->glowsize);
1812                         MSG_WriteByte(msg, s->glowcolor);
1813                 }
1814                 if (bits & E5_COLORMOD)
1815                 {
1816                         MSG_WriteByte(msg, s->colormod[0]);
1817                         MSG_WriteByte(msg, s->colormod[1]);
1818                         MSG_WriteByte(msg, s->colormod[2]);
1819                 }
1820         }
1821 }
1822
1823 void EntityState5_ReadUpdate(entity_state_t *s)
1824 {
1825         int bits;
1826         bits = MSG_ReadByte();
1827         if (bits & E5_EXTEND1)
1828         {
1829                 bits |= MSG_ReadByte() << 8;
1830                 if (bits & E5_EXTEND2)
1831                 {
1832                         bits |= MSG_ReadByte() << 16;
1833                         if (bits & E5_EXTEND3)
1834                                 bits |= MSG_ReadByte() << 24;
1835                 }
1836         }
1837         if (bits & E5_FULLUPDATE)
1838         {
1839                 *s = defaultstate;
1840                 s->active = true;
1841         }
1842         if (bits & E5_FLAGS)
1843                 s->flags = MSG_ReadByte();
1844         if (bits & E5_ORIGIN)
1845         {
1846                 if (bits & E5_ORIGIN32)
1847                 {
1848                         s->origin[0] = MSG_ReadCoord32f();
1849                         s->origin[1] = MSG_ReadCoord32f();
1850                         s->origin[2] = MSG_ReadCoord32f();
1851                 }
1852                 else
1853                 {
1854                         s->origin[0] = MSG_ReadCoord13i();
1855                         s->origin[1] = MSG_ReadCoord13i();
1856                         s->origin[2] = MSG_ReadCoord13i();
1857                 }
1858         }
1859         if (bits & E5_ANGLES)
1860         {
1861                 if (bits & E5_ANGLES16)
1862                 {
1863                         s->angles[0] = MSG_ReadAngle16i();
1864                         s->angles[1] = MSG_ReadAngle16i();
1865                         s->angles[2] = MSG_ReadAngle16i();
1866                 }
1867                 else
1868                 {
1869                         s->angles[0] = MSG_ReadAngle8i();
1870                         s->angles[1] = MSG_ReadAngle8i();
1871                         s->angles[2] = MSG_ReadAngle8i();
1872                 }
1873         }
1874         if (bits & E5_MODEL)
1875         {
1876                 if (bits & E5_MODEL16)
1877                         s->modelindex = (unsigned short) MSG_ReadShort();
1878                 else
1879                         s->modelindex = MSG_ReadByte();
1880         }
1881         if (bits & E5_FRAME)
1882         {
1883                 if (bits & E5_FRAME16)
1884                         s->frame = (unsigned short) MSG_ReadShort();
1885                 else
1886                         s->frame = MSG_ReadByte();
1887         }
1888         if (bits & E5_SKIN)
1889                 s->skin = MSG_ReadByte();
1890         if (bits & E5_EFFECTS)
1891         {
1892                 if (bits & E5_EFFECTS32)
1893                         s->effects = (unsigned int) MSG_ReadLong();
1894                 else if (bits & E5_EFFECTS16)
1895                         s->effects = (unsigned short) MSG_ReadShort();
1896                 else
1897                         s->effects = MSG_ReadByte();
1898         }
1899         if (bits & E5_ALPHA)
1900                 s->alpha = MSG_ReadByte();
1901         if (bits & E5_SCALE)
1902                 s->scale = MSG_ReadByte();
1903         if (bits & E5_COLORMAP)
1904                 s->colormap = MSG_ReadByte();
1905         if (bits & E5_ATTACHMENT)
1906         {
1907                 s->tagentity = (unsigned short) MSG_ReadShort();
1908                 s->tagindex = MSG_ReadByte();
1909         }
1910         if (bits & E5_LIGHT)
1911         {
1912                 s->light[0] = (unsigned short) MSG_ReadShort();
1913                 s->light[1] = (unsigned short) MSG_ReadShort();
1914                 s->light[2] = (unsigned short) MSG_ReadShort();
1915                 s->light[3] = (unsigned short) MSG_ReadShort();
1916                 s->lightstyle = MSG_ReadByte();
1917                 s->lightpflags = MSG_ReadByte();
1918         }
1919         if (bits & E5_GLOW)
1920         {
1921                 s->glowsize = MSG_ReadByte();
1922                 s->glowcolor = MSG_ReadByte();
1923         }
1924         if (bits & E5_COLORMOD)
1925         {
1926                 s->colormod[0] = MSG_ReadByte();
1927                 s->colormod[1] = MSG_ReadByte();
1928                 s->colormod[2] = MSG_ReadByte();
1929         }
1930
1931
1932         if (developer_networkentities.integer >= 2)
1933         {
1934                 Con_Printf("ReadFields e%i", s->number);
1935
1936                 if (bits & E5_ORIGIN)
1937                         Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
1938                 if (bits & E5_ANGLES)
1939                         Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
1940                 if (bits & E5_MODEL)
1941                         Con_Printf(" E5_MODEL %i", s->modelindex);
1942                 if (bits & E5_FRAME)
1943                         Con_Printf(" E5_FRAME %i", s->frame);
1944                 if (bits & E5_SKIN)
1945                         Con_Printf(" E5_SKIN %i", s->skin);
1946                 if (bits & E5_EFFECTS)
1947                         Con_Printf(" E5_EFFECTS %i", s->effects);
1948                 if (bits & E5_FLAGS)
1949                 {
1950                         Con_Printf(" E5_FLAGS %i (", s->flags);
1951                         if (s->flags & RENDER_STEP)
1952                                 Con_Print(" STEP");
1953                         if (s->flags & RENDER_GLOWTRAIL)
1954                                 Con_Print(" GLOWTRAIL");
1955                         if (s->flags & RENDER_VIEWMODEL)
1956                                 Con_Print(" VIEWMODEL");
1957                         if (s->flags & RENDER_EXTERIORMODEL)
1958                                 Con_Print(" EXTERIORMODEL");
1959                         if (s->flags & RENDER_LOWPRECISION)
1960                                 Con_Print(" LOWPRECISION");
1961                         if (s->flags & RENDER_COLORMAPPED)
1962                                 Con_Print(" COLORMAPPED");
1963                         if (s->flags & RENDER_SHADOW)
1964                                 Con_Print(" SHADOW");
1965                         if (s->flags & RENDER_LIGHT)
1966                                 Con_Print(" LIGHT");
1967                         Con_Print(")");
1968                 }
1969                 if (bits & E5_ALPHA)
1970                         Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
1971                 if (bits & E5_SCALE)
1972                         Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
1973                 if (bits & E5_COLORMAP)
1974                         Con_Printf(" E5_COLORMAP %i", s->colormap);
1975                 if (bits & E5_ATTACHMENT)
1976                         Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
1977                 if (bits & E5_LIGHT)
1978                         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);
1979                 if (bits & E5_GLOW)
1980                         Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
1981                 if (bits & E5_COLORMOD)
1982                         Con_Printf(" E5_COLORMOD %f:%f:%f", s->colormod[0] / 32.0f, s->colormod[1] / 32.0f, s->colormod[2] / 32.0f);
1983                 Con_Print("\n");
1984         }
1985 }
1986
1987 int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
1988 {
1989         unsigned int bits = 0;
1990         if (n->active)
1991         {
1992                 if (!o->active)
1993                         bits |= E5_FULLUPDATE;
1994                 if (!VectorCompare(o->origin, n->origin))
1995                         bits |= E5_ORIGIN;
1996                 if (!VectorCompare(o->angles, n->angles))
1997                         bits |= E5_ANGLES;
1998                 if (o->modelindex != n->modelindex)
1999                         bits |= E5_MODEL;
2000                 if (o->frame != n->frame)
2001                         bits |= E5_FRAME;
2002                 if (o->skin != n->skin)
2003                         bits |= E5_SKIN;
2004                 if (o->effects != n->effects)
2005                         bits |= E5_EFFECTS;
2006                 if (o->flags != n->flags)
2007                         bits |= E5_FLAGS;
2008                 if (o->alpha != n->alpha)
2009                         bits |= E5_ALPHA;
2010                 if (o->scale != n->scale)
2011                         bits |= E5_SCALE;
2012                 if (o->colormap != n->colormap)
2013                         bits |= E5_COLORMAP;
2014                 if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
2015                         bits |= E5_ATTACHMENT;
2016                 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)
2017                         bits |= E5_LIGHT;
2018                 if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
2019                         bits |= E5_GLOW;
2020                 if (o->colormod[0] != n->colormod[0] || o->colormod[1] != n->colormod[1] || o->colormod[2] != n->colormod[2])
2021                         bits |= E5_COLORMOD;
2022         }
2023         else
2024                 if (o->active)
2025                         bits |= E5_FULLUPDATE;
2026         return bits;
2027 }
2028
2029 void EntityFrame5_CL_ReadFrame(void)
2030 {
2031         int i, n, enumber;
2032         entity_t *ent;
2033         entity_state_t *s;
2034         // read the number of this frame to echo back in next input packet
2035         for (i = 0;i < LATESTFRAMENUMS-1;i++)
2036                 cl.latestframenums[i] = cl.latestframenums[i+1];
2037         cl.latestframenums[LATESTFRAMENUMS-1] = MSG_ReadLong();
2038         if (developer_networkentities.integer)
2039                 Con_Printf("recv: svc_entities %i\n", cl.latestframenums[LATESTFRAMENUMS-1]);
2040         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)
2041                 cl.servermovesequence = MSG_ReadLong();
2042         // read entity numbers until we find a 0x8000
2043         // (which would be remove world entity, but is actually a terminator)
2044         while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
2045         {
2046                 // get the entity number
2047                 enumber = n & 0x7FFF;
2048                 // we may need to expand the array
2049                 if (cl.num_entities <= enumber)
2050                 {
2051                         cl.num_entities = enumber + 1;
2052                         if (enumber >= cl.max_entities)
2053                                 CL_ExpandEntities(enumber);
2054                 }
2055                 // look up the entity
2056                 ent = cl.entities + enumber;
2057                 // slide the current into the previous slot
2058                 ent->state_previous = ent->state_current;
2059                 // read the update
2060                 s = &ent->state_current;
2061                 if (n & 0x8000)
2062                 {
2063                         // remove entity
2064                         *s = defaultstate;
2065                 }
2066                 else
2067                 {
2068                         // update entity
2069                         EntityState5_ReadUpdate(s);
2070                 }
2071                 // set the cl.entities_active flag
2072                 cl.entities_active[enumber] = s->active;
2073                 // set the update time
2074                 s->time = cl.mtime[0];
2075                 // fix the number (it gets wiped occasionally by copying from defaultstate)
2076                 s->number = enumber;
2077                 // check if we need to update the lerp stuff
2078                 if (s->active)
2079                         CL_MoveLerpEntityStates(&cl.entities[enumber]);
2080                 // print extra messages if desired
2081                 if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
2082                 {
2083                         if (cl.entities[enumber].state_current.active)
2084                                 Con_Printf("entity #%i has become active\n", enumber);
2085                         else if (cl.entities[enumber].state_previous.active)
2086                                 Con_Printf("entity #%i has become inactive\n", enumber);
2087                 }
2088         }
2089 }
2090
2091 void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum)
2092 {
2093         int i, j, k, l, bits;
2094         entityframe5_changestate_t *s, *s2;
2095         entityframe5_packetlog_t *p, *p2;
2096         unsigned char statsdeltabits[(MAX_CL_STATS+7)/8];
2097         // scan for packets that were lost
2098         for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
2099         {
2100                 if (p->packetnumber && p->packetnumber <= framenum)
2101                 {
2102                         // packet was lost - merge deltabits into the main array so they
2103                         // will be re-sent, but only if there is no newer update of that
2104                         // bit in the logs (as those will arrive before this update)
2105                         for (j = 0, s = p->states;j < p->numstates;j++, s++)
2106                         {
2107                                 // check for any newer updates to this entity and mask off any
2108                                 // overlapping bits (we don't need to send something again if
2109                                 // it has already been sent more recently)
2110                                 bits = s->bits & ~d->deltabits[s->number];
2111                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
2112                                 {
2113                                         if (p2->packetnumber > framenum)
2114                                         {
2115                                                 for (l = 0, s2 = p2->states;l < p2->numstates;l++, s2++)
2116                                                 {
2117                                                         if (s2->number == s->number)
2118                                                         {
2119                                                                 bits &= ~s2->bits;
2120                                                                 break;
2121                                                         }
2122                                                 }
2123                                         }
2124                                 }
2125                                 // if the bits haven't all been cleared, there were some bits
2126                                 // lost with this packet, so set them again now
2127                                 if (bits)
2128                                 {
2129                                         d->deltabits[s->number] |= bits;
2130                                         // if it was a very important update, set priority higher
2131                                         if (bits & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL || E5_COLORMAP))
2132                                                 d->priorities[s->number] = max(d->priorities[s->number], 4);
2133                                         else
2134                                                 d->priorities[s->number] = max(d->priorities[s->number], 1);
2135                                 }
2136                         }
2137                         // mark lost stats
2138                         for (j = 0;j < MAX_CL_STATS;j++)
2139                         {
2140                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2141                                         statsdeltabits[l] = p->statsdeltabits[l] & ~d->statsdeltabits[l];
2142                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS;k++, p2++)
2143                                         if (p2->packetnumber > framenum)
2144                                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2145                                                         statsdeltabits[l] = p->statsdeltabits[l] & ~p2->statsdeltabits[l];
2146                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2147                                         d->statsdeltabits[l] |= statsdeltabits[l];
2148                         }
2149                         // delete this packet log as it is now obsolete
2150                         p->packetnumber = 0;
2151                 }
2152         }
2153 }
2154
2155 void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
2156 {
2157         int i;
2158         // scan for packets made obsolete by this ack and delete them
2159         for (i = 0;i < ENTITYFRAME5_MAXPACKETLOGS;i++)
2160                 if (d->packetlog[i].packetnumber <= framenum)
2161                         d->packetlog[i].packetnumber = 0;
2162 }
2163
2164 void EntityFrame5_WriteFrame(sizebuf_t *msg, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int *stats, int movesequence)
2165 {
2166         const entity_state_t *n;
2167         int i, num, l, framenum, packetlognumber, priority;
2168         sizebuf_t buf;
2169         unsigned char data[128];
2170         entityframe5_packetlog_t *packetlog;
2171
2172         if (prog->max_edicts > d->maxedicts)
2173                 EntityFrame5_ExpandEdicts(d, prog->max_edicts);
2174
2175         framenum = d->latestframenum + 1;
2176         d->viewentnum = viewentnum;
2177
2178         // if packet log is full, mark all frames as lost, this will cause
2179         // it to send the lost data again
2180         for (packetlognumber = 0;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++)
2181                 if (d->packetlog[packetlognumber].packetnumber == 0)
2182                         break;
2183         if (packetlognumber == ENTITYFRAME5_MAXPACKETLOGS)
2184         {
2185                 Con_DPrintf("EntityFrame5_WriteFrame: packetlog overflow for a client, resetting\n");
2186                 EntityFrame5_LostFrame(d, framenum);
2187                 packetlognumber = 0;
2188         }
2189
2190         // prepare the buffer
2191         memset(&buf, 0, sizeof(buf));
2192         buf.data = data;
2193         buf.maxsize = sizeof(data);
2194
2195         // detect changes in stats
2196         for (i = 0;i < MAX_CL_STATS;i++)
2197         {
2198                 if (d->stats[i] != stats[i])
2199                 {
2200                         d->statsdeltabits[i>>3] |= (1<<(i&7));
2201                         d->stats[i] = stats[i];
2202                 }
2203         }
2204
2205         // detect changes in states
2206         num = 0;
2207         for (i = 0, n = states;i < numstates;i++, n++)
2208         {
2209                 // mark gaps in entity numbering as removed entities
2210                 for (;num < n->number;num++)
2211                 {
2212                         // if the entity used to exist, clear it
2213                         if (CHECKPVSBIT(d->visiblebits, num))
2214                         {
2215                                 CLEARPVSBIT(d->visiblebits, num);
2216                                 d->deltabits[num] = E5_FULLUPDATE;
2217                                 d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2218                                 d->states[num] = defaultstate;
2219                                 d->states[num].number = num;
2220                         }
2221                 }
2222                 // update the entity state data
2223                 if (!CHECKPVSBIT(d->visiblebits, num))
2224                 {
2225                         // entity just spawned in, don't let it completely hog priority
2226                         // because of being ancient on the first frame
2227                         d->updateframenum[num] = framenum;
2228                         // initial priority is a bit high to make projectiles send on the
2229                         // first frame, among other things
2230                         d->priorities[num] = max(d->priorities[num], 4);
2231                 }
2232                 SETPVSBIT(d->visiblebits, num);
2233                 d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
2234                 d->priorities[num] = max(d->priorities[num], 1);
2235                 d->states[num] = *n;
2236                 d->states[num].number = num;
2237                 // advance to next entity so the next iteration doesn't immediately remove it
2238                 num++;
2239         }
2240         // all remaining entities are dead
2241         for (;num < d->maxedicts;num++)
2242         {
2243                 if (CHECKPVSBIT(d->visiblebits, num))
2244                 {
2245                         CLEARPVSBIT(d->visiblebits, num);
2246                         d->deltabits[num] = E5_FULLUPDATE;
2247                         d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2248                         d->states[num] = defaultstate;
2249                         d->states[num].number = num;
2250                 }
2251         }
2252
2253         // if there isn't at least enough room for an empty svc_entities,
2254         // don't bother trying...
2255         if (buf.cursize + 11 > buf.maxsize)
2256                 return;
2257
2258         // build lists of entities by priority level
2259         memset(entityframe5_prioritychaincounts, 0, sizeof(entityframe5_prioritychaincounts));
2260         l = 0;
2261         for (num = 0;num < d->maxedicts;num++)
2262         {
2263                 if (d->priorities[num])
2264                 {
2265                         if (d->priorities[num] < (E5_PROTOCOL_PRIORITYLEVELS - 1))
2266                                 d->priorities[num] = EntityState5_Priority(d, num);
2267                         l = num;
2268                         priority = d->priorities[num];
2269                         if (entityframe5_prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
2270                                 entityframe5_prioritychains[priority][entityframe5_prioritychaincounts[priority]++] = num;
2271                 }
2272         }
2273
2274         // add packetlog entry
2275         packetlog = d->packetlog + packetlognumber;
2276         packetlog->packetnumber = framenum;
2277         packetlog->numstates = 0;
2278         // write stat updates
2279         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)
2280         {
2281                 for (i = 0;i < MAX_CL_STATS && msg->cursize + 6 + 11 <= msg->maxsize;i++)
2282                 {
2283                         if (d->statsdeltabits[i>>3] & (1<<(i&7)))
2284                         {
2285                                 d->statsdeltabits[i>>3] &= ~(1<<(i&7));
2286                                 packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
2287                                 if (d->stats[i] >= 0 && d->stats[i] < 256)
2288                                 {
2289                                         MSG_WriteByte(msg, svc_updatestatubyte);
2290                                         MSG_WriteByte(msg, i);
2291                                         MSG_WriteByte(msg, d->stats[i]);
2292                                 }
2293                                 else
2294                                 {
2295                                         MSG_WriteByte(msg, svc_updatestat);
2296                                         MSG_WriteByte(msg, i);
2297                                         MSG_WriteLong(msg, d->stats[i]);
2298                                 }
2299                         }
2300                 }
2301         }
2302         // write state updates
2303         if (developer_networkentities.integer)
2304                 Con_Printf("send: svc_entities %i\n", framenum);
2305         d->latestframenum = framenum;
2306         MSG_WriteByte(msg, svc_entities);
2307         MSG_WriteLong(msg, framenum);
2308         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)
2309                 MSG_WriteLong(msg, movesequence);
2310         for (priority = E5_PROTOCOL_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
2311         {
2312                 for (i = 0;i < entityframe5_prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
2313                 {
2314                         num = entityframe5_prioritychains[priority][i];
2315                         n = d->states + num;
2316                         if (d->deltabits[num] & E5_FULLUPDATE)
2317                                 d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
2318                         buf.cursize = 0;
2319                         EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
2320                         // if the entity won't fit, try the next one
2321                         if (msg->cursize + buf.cursize + 2 > msg->maxsize)
2322                                 continue;
2323                         // write entity to the packet
2324                         SZ_Write(msg, buf.data, buf.cursize);
2325                         // mark age on entity for prioritization
2326                         d->updateframenum[num] = framenum;
2327                         // log entity so deltabits can be restored later if lost
2328                         packetlog->states[packetlog->numstates].number = num;
2329                         packetlog->states[packetlog->numstates].bits = d->deltabits[num];
2330                         packetlog->numstates++;
2331                         // clear deltabits and priority so it won't be sent again
2332                         d->deltabits[num] = 0;
2333                         d->priorities[num] = 0;
2334                 }
2335         }
2336         MSG_WriteShort(msg, 0x8000);
2337 }
2338
2339
2340 static int QW_TranslateEffects(int qweffects, int number)
2341 {
2342         int effects = 0;
2343         if (qweffects & QW_EF_BRIGHTFIELD)
2344                 effects |= EF_BRIGHTFIELD;
2345         if (qweffects & QW_EF_MUZZLEFLASH)
2346                 effects |= EF_MUZZLEFLASH;
2347         if (qweffects & QW_EF_FLAG1)
2348         {
2349                 // mimic FTEQW's interpretation of EF_FLAG1 as EF_NODRAW on non-player entities
2350                 if (number > cl.maxclients)
2351                         effects |= EF_NODRAW;
2352                 else
2353                         effects |= EF_FLAG1QW;
2354         }
2355         if (qweffects & QW_EF_FLAG2)
2356         {
2357                 // mimic FTEQW's interpretation of EF_FLAG2 as EF_ADDITIVE on non-player entities
2358                 if (number > cl.maxclients)
2359                         effects |= EF_ADDITIVE;
2360                 else
2361                         effects |= EF_FLAG2QW;
2362         }
2363         if (qweffects & QW_EF_RED)
2364         {
2365                 if (qweffects & QW_EF_BLUE)
2366                         effects |= EF_RED | EF_BLUE;
2367                 else
2368                         effects |= EF_RED;
2369         }
2370         else if (qweffects & QW_EF_BLUE)
2371                 effects |= EF_BLUE;
2372         else if (qweffects & QW_EF_BRIGHTLIGHT)
2373                 effects |= EF_BRIGHTLIGHT;
2374         else if (qweffects & QW_EF_DIMLIGHT)
2375                 effects |= EF_DIMLIGHT;
2376         return effects;
2377 }
2378
2379 void EntityStateQW_ReadPlayerUpdate(void)
2380 {
2381         int slot = MSG_ReadByte();
2382         int enumber = slot + 1;
2383         int weaponframe;
2384         int msec;
2385         int playerflags;
2386         int bits;
2387         entity_state_t *s;
2388         // look up the entity
2389         entity_t *ent = cl.entities + enumber;
2390         vec3_t viewangles;
2391         vec3_t velocity;
2392
2393         // slide the current state into the previous
2394         ent->state_previous = ent->state_current;
2395
2396         // read the update
2397         s = &ent->state_current;
2398         *s = defaultstate;
2399         s->active = true;
2400         s->colormap = enumber;
2401         playerflags = MSG_ReadShort();
2402         MSG_ReadVector(s->origin, cls.protocol);
2403         s->frame = MSG_ReadByte();
2404
2405         VectorClear(viewangles);
2406         VectorClear(velocity);
2407
2408         if (playerflags & QW_PF_MSEC)
2409         {
2410                 // time difference between last update this player sent to the server,
2411                 // and last input we sent to the server (this packet is in response to
2412                 // our input, so msec is how long ago the last update of this player
2413                 // entity occurred, compared to our input being received)
2414                 msec = MSG_ReadByte();
2415         }
2416         else
2417                 msec = 0;
2418         if (playerflags & QW_PF_COMMAND)
2419         {
2420                 bits = MSG_ReadByte();
2421                 if (bits & QW_CM_ANGLE1)
2422                         viewangles[0] = MSG_ReadAngle16i(); // cmd->angles[0]
2423                 if (bits & QW_CM_ANGLE2)
2424                         viewangles[1] = MSG_ReadAngle16i(); // cmd->angles[1]
2425                 if (bits & QW_CM_ANGLE3)
2426                         viewangles[2] = MSG_ReadAngle16i(); // cmd->angles[2]
2427                 if (bits & QW_CM_FORWARD)
2428                         MSG_ReadShort(); // cmd->forwardmove
2429                 if (bits & QW_CM_SIDE)
2430                         MSG_ReadShort(); // cmd->sidemove
2431                 if (bits & QW_CM_UP)
2432                         MSG_ReadShort(); // cmd->upmove
2433                 if (bits & QW_CM_BUTTONS)
2434                         MSG_ReadByte(); // cmd->buttons
2435                 if (bits & QW_CM_IMPULSE)
2436                         MSG_ReadByte(); // cmd->impulse
2437                 MSG_ReadByte(); // cmd->msec
2438         }
2439         if (playerflags & QW_PF_VELOCITY1)
2440                 velocity[0] = MSG_ReadShort();
2441         if (playerflags & QW_PF_VELOCITY2)
2442                 velocity[1] = MSG_ReadShort();
2443         if (playerflags & QW_PF_VELOCITY3)
2444                 velocity[2] = MSG_ReadShort();
2445         if (playerflags & QW_PF_MODEL)
2446                 s->modelindex = MSG_ReadByte();
2447         else
2448                 s->modelindex = cl.qw_modelindex_player;
2449         if (playerflags & QW_PF_SKINNUM)
2450                 s->skin = MSG_ReadByte();
2451         if (playerflags & QW_PF_EFFECTS)
2452                 s->effects = QW_TranslateEffects(MSG_ReadByte(), enumber);
2453         if (playerflags & QW_PF_WEAPONFRAME)
2454                 weaponframe = MSG_ReadByte();
2455         else
2456                 weaponframe = 0;
2457
2458         if (enumber == cl.playerentity)
2459         {
2460                 // if this is an update on our player, update the angles
2461                 VectorCopy(cl.viewangles, viewangles);
2462         }
2463
2464         // calculate the entity angles from the viewangles
2465         s->angles[0] = viewangles[0] * -0.0333;
2466         s->angles[1] = viewangles[1];
2467         s->angles[2] = 0;
2468         s->angles[2] = V_CalcRoll(s->angles, velocity)*4;
2469
2470         // if this is an update on our player, update interpolation state
2471         if (enumber == cl.playerentity)
2472         {
2473                 VectorCopy (cl.mpunchangle[0], cl.mpunchangle[1]);
2474                 VectorCopy (cl.mpunchvector[0], cl.mpunchvector[1]);
2475                 VectorCopy (cl.mvelocity[0], cl.mvelocity[1]);
2476                 cl.mviewzoom[1] = cl.mviewzoom[0];
2477
2478                 cl.idealpitch = 0;
2479                 cl.mpunchangle[0][0] = 0;
2480                 cl.mpunchangle[0][1] = 0;
2481                 cl.mpunchangle[0][2] = 0;
2482                 cl.mpunchvector[0][0] = 0;
2483                 cl.mpunchvector[0][1] = 0;
2484                 cl.mpunchvector[0][2] = 0;
2485                 cl.mvelocity[0][0] = 0;
2486                 cl.mvelocity[0][1] = 0;
2487                 cl.mvelocity[0][2] = 0;
2488                 cl.mviewzoom[0] = 1;
2489
2490                 VectorCopy(velocity, cl.mvelocity[0]);
2491                 cl.stats[STAT_WEAPONFRAME] = weaponframe;
2492                 if (playerflags & QW_PF_GIB)
2493                         cl.stats[STAT_VIEWHEIGHT] = 8;
2494                 else if (playerflags & QW_PF_DEAD)
2495                         cl.stats[STAT_VIEWHEIGHT] = -16;
2496                 else
2497                         cl.stats[STAT_VIEWHEIGHT] = 22;
2498         }
2499
2500         // set the cl.entities_active flag
2501         cl.entities_active[enumber] = s->active;
2502         // set the update time
2503         s->time = cl.mtime[0] - msec * 0.001; // qw has no clock
2504         // fix the number (it gets wiped occasionally by copying from defaultstate)
2505         s->number = enumber;
2506         // check if we need to update the lerp stuff
2507         if (s->active)
2508                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
2509 }
2510
2511 static void EntityStateQW_ReadEntityUpdate(entity_state_t *s, int bits)
2512 {
2513         int qweffects = 0;
2514         s->active = true;
2515         s->number = bits & 511;
2516         bits &= ~511;
2517         if (bits & QW_U_MOREBITS)
2518                 bits |= MSG_ReadByte();
2519
2520         // store the QW_U_SOLID bit here?
2521
2522         if (bits & QW_U_MODEL)
2523                 s->modelindex = MSG_ReadByte();
2524         if (bits & QW_U_FRAME)
2525                 s->frame = MSG_ReadByte();
2526         if (bits & QW_U_COLORMAP)
2527                 s->colormap = MSG_ReadByte();
2528         if (bits & QW_U_SKIN)
2529                 s->skin = MSG_ReadByte();
2530         if (bits & QW_U_EFFECTS)
2531                 s->effects = QW_TranslateEffects(qweffects = MSG_ReadByte(), s->number);
2532         if (bits & QW_U_ORIGIN1)
2533                 s->origin[0] = MSG_ReadCoord13i();
2534         if (bits & QW_U_ANGLE1)
2535                 s->angles[0] = MSG_ReadAngle8i();
2536         if (bits & QW_U_ORIGIN2)
2537                 s->origin[1] = MSG_ReadCoord13i();
2538         if (bits & QW_U_ANGLE2)
2539                 s->angles[1] = MSG_ReadAngle8i();
2540         if (bits & QW_U_ORIGIN3)
2541                 s->origin[2] = MSG_ReadCoord13i();
2542         if (bits & QW_U_ANGLE3)
2543                 s->angles[2] = MSG_ReadAngle8i();
2544
2545         if (developer_networkentities.integer >= 2)
2546         {
2547                 Con_Printf("ReadFields e%i", s->number);
2548                 if (bits & QW_U_MODEL)
2549                         Con_Printf(" U_MODEL %i", s->modelindex);
2550                 if (bits & QW_U_FRAME)
2551                         Con_Printf(" U_FRAME %i", s->frame);
2552                 if (bits & QW_U_COLORMAP)
2553                         Con_Printf(" U_COLORMAP %i", s->colormap);
2554                 if (bits & QW_U_SKIN)
2555                         Con_Printf(" U_SKIN %i", s->skin);
2556                 if (bits & QW_U_EFFECTS)
2557                         Con_Printf(" U_EFFECTS %i", qweffects);
2558                 if (bits & QW_U_ORIGIN1)
2559                         Con_Printf(" U_ORIGIN1 %f", s->origin[0]);
2560                 if (bits & QW_U_ANGLE1)
2561                         Con_Printf(" U_ANGLE1 %f", s->angles[0]);
2562                 if (bits & QW_U_ORIGIN2)
2563                         Con_Printf(" U_ORIGIN2 %f", s->origin[1]);
2564                 if (bits & QW_U_ANGLE2)
2565                         Con_Printf(" U_ANGLE2 %f", s->angles[1]);
2566                 if (bits & QW_U_ORIGIN3)
2567                         Con_Printf(" U_ORIGIN3 %f", s->origin[2]);
2568                 if (bits & QW_U_ANGLE3)
2569                         Con_Printf(" U_ANGLE3 %f", s->angles[2]);
2570                 if (bits & QW_U_SOLID)
2571                         Con_Printf(" U_SOLID");
2572                 Con_Print("\n");
2573         }
2574 }
2575
2576 entityframeqw_database_t *EntityFrameQW_AllocDatabase(mempool_t *pool)
2577 {
2578         entityframeqw_database_t *d;
2579         d = (entityframeqw_database_t *)Mem_Alloc(pool, sizeof(*d));
2580         return d;
2581 }
2582
2583 void EntityFrameQW_FreeDatabase(entityframeqw_database_t *d)
2584 {
2585         Mem_Free(d);
2586 }
2587
2588 void EntityFrameQW_CL_ReadFrame(qboolean delta)
2589 {
2590         qboolean invalid = false;
2591         int number, oldsnapindex, newsnapindex, oldindex, newindex, oldnum, newnum;
2592         entity_t *ent;
2593         entityframeqw_database_t *d;
2594         entityframeqw_snapshot_t *oldsnap, *newsnap;
2595
2596         if (!cl.entitydatabaseqw)
2597                 cl.entitydatabaseqw = EntityFrameQW_AllocDatabase(cls.levelmempool);
2598         d = cl.entitydatabaseqw;
2599
2600         // there is no cls.netcon in demos, so this reading code can't access
2601         // cls.netcon-> at all...  so cls.qw_incoming_sequence and
2602         // cls.qw_outgoing_sequence are updated every time the corresponding
2603         // cls.netcon->qw. variables are updated
2604         // read the number of this frame to echo back in next input packet
2605         cl.qw_validsequence = cls.qw_incoming_sequence;
2606         newsnapindex = cl.qw_validsequence & QW_UPDATE_MASK;
2607         newsnap = d->snapshot + newsnapindex;
2608         memset(newsnap, 0, sizeof(*newsnap));
2609         oldsnapindex = -1;
2610         oldsnap = NULL;
2611         if (delta)
2612         {
2613                 number = MSG_ReadByte();
2614                 oldsnapindex = cl.qw_deltasequence[newsnapindex];
2615                 if ((number & QW_UPDATE_MASK) != (oldsnapindex & QW_UPDATE_MASK))
2616                         Con_DPrintf("WARNING: from mismatch\n");
2617                 if (oldsnapindex != -1)
2618                 {
2619                         if (cls.qw_outgoing_sequence - oldsnapindex >= QW_UPDATE_BACKUP-1)
2620                         {
2621                                 Con_DPrintf("delta update too old\n");
2622                                 newsnap->invalid = invalid = true; // too old
2623                                 delta = false;
2624                         }
2625                         oldsnap = d->snapshot + (oldsnapindex & QW_UPDATE_MASK);
2626                 }
2627                 else
2628                         delta = false;
2629         }
2630
2631         // if we can't decode this frame properly, report that to the server
2632         if (invalid)
2633                 cl.qw_validsequence = 0;
2634
2635         // read entity numbers until we find a 0x0000
2636         // (which would be an empty update on world entity, but is actually a terminator)
2637         newsnap->num_entities = 0;
2638         oldindex = 0;
2639         for (;;)
2640         {
2641                 int word = (unsigned short)MSG_ReadShort();
2642                 if (msg_badread)
2643                         return; // just return, the main parser will print an error
2644                 newnum = word == 0 ? 512 : (word & 511);
2645                 oldnum = delta ? (oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number) : 9999;
2646
2647                 // copy unmodified oldsnap entities
2648                 while (newnum > oldnum) // delta only
2649                 {
2650                         if (developer_networkentities.integer >= 2)
2651                                 Con_Printf("copy %i\n", oldnum);
2652                         // copy one of the old entities
2653                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2654                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2655                         newsnap->entities[newsnap->num_entities] = oldsnap->entities[oldindex++];
2656                         newsnap->num_entities++;
2657                         oldnum = oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number;
2658                 }
2659
2660                 if (word == 0)
2661                         break;
2662
2663                 if (developer_networkentities.integer >= 2)
2664                 {
2665                         if (word & QW_U_REMOVE)
2666                                 Con_Printf("remove %i\n", newnum);
2667                         else if (newnum == oldnum)
2668                                 Con_Printf("delta %i\n", newnum);
2669                         else
2670                                 Con_Printf("baseline %i\n", newnum);
2671                 }
2672
2673                 if (word & QW_U_REMOVE)
2674                 {
2675                         if (newnum != oldnum && !delta && !invalid)
2676                         {
2677                                 cl.qw_validsequence = 0;
2678                                 Con_Printf("WARNING: U_REMOVE %i on full update\n", newnum);
2679                         }
2680                 }
2681                 else
2682                 {
2683                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2684                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2685                         newsnap->entities[newsnap->num_entities] = (newnum == oldnum) ? oldsnap->entities[oldindex] : cl.entities[newnum].state_baseline;
2686                         EntityStateQW_ReadEntityUpdate(newsnap->entities + newsnap->num_entities, word);
2687                         newsnap->num_entities++;
2688                 }
2689
2690                 if (newnum == oldnum)
2691                         oldindex++;
2692         }
2693
2694         // expand cl.num_entities to include every entity we've seen this game
2695         newnum = newsnap->num_entities ? newsnap->entities[newsnap->num_entities - 1].number : 1;
2696         if (cl.num_entities <= newnum)
2697         {
2698                 cl.num_entities = newnum + 1;
2699                 if (cl.max_entities < newnum + 1)
2700                         CL_ExpandEntities(newnum);
2701         }
2702
2703         // now update the non-player entities from the snapshot states
2704         number = cl.maxclients + 1;
2705         for (newindex = 0;;newindex++)
2706         {
2707                 newnum = newindex >= newsnap->num_entities ? cl.num_entities : newsnap->entities[newindex].number;
2708                 // kill any missing entities
2709                 for (;number < newnum;number++)
2710                 {
2711                         if (cl.entities_active[number])
2712                         {
2713                                 cl.entities_active[number] = false;
2714                                 cl.entities[number].state_current.active = false;
2715                         }
2716                 }
2717                 if (number >= cl.num_entities)
2718                         break;
2719                 // update the entity
2720                 ent = &cl.entities[number];
2721                 ent->state_previous = ent->state_current;
2722                 ent->state_current = newsnap->entities[newindex];
2723                 ent->state_current.time = cl.mtime[0];
2724                 CL_MoveLerpEntityStates(ent);
2725                 // the entity lives again...
2726                 cl.entities_active[number] = true;
2727                 number++;
2728         }
2729 }