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 netcenter[3]; // ! for network prioritization, this is the center of the bounding box (which may differ from the origin)
  12         {0,0,0},//float origin[3];
  13         {0,0,0},//float angles[3];
  14         0,//int number; // entity number this state is for
  15         0,//int effects;
  16         0,//unsigned int customizeentityforclient; // !
  17         0,//unsigned short modelindex;
  18         0,//unsigned short frame;
  19         0,//unsigned short tagentity;
  20         0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
  21         0,//unsigned short viewmodelforclient; // !
  22         0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
  23         0,//unsigned short nodrawtoclient; // !
  24         0,//unsigned short drawonlytoclient; // !
  25         {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
  26         0,//unsigned char active; // true if a valid state
  27         0,//unsigned char lightstyle;
  28         0,//unsigned char lightpflags;
  29         0,//unsigned char colormap;
  30         0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
  31         255,//unsigned char alpha;
  32         16,//unsigned char scale;
  33         0,//unsigned char glowsize;
  34         254,//unsigned char glowcolor;
  35         0,//unsigned char flags;
  36         0,//unsigned char tagindex;
  37         {32, 32, 32},//unsigned char colormod[3];
  38         // padding to a multiple of 8 bytes (to align the double time)
  39         {0,0}//unsigned char unused[2]; // !
  40 };
  41
  42 // LordHavoc: I own protocol ranges 96, 97, 3500-3599
  43
  44 struct protocolversioninfo_s
  45 {
  46         int number;
  47         const char *name;
  48 }
  49 protocolversioninfo[] =
  50 {
  51         {0, "UNKNOWN"},
  52         {3504, "DP7"},
  53         {3503, "DP6"},
  54         {3502, "DP5"},
  55         {3501, "DP4"},
  56         {3500, "DP3"},
  57         {97, "DP2"},
  58         {96, "DP1"},
  59         {15, "QUAKEDP"},
  60         {250, "NEHAHRAMOVIE"},
  61         {15, "QUAKE"},
  62         {28, "QUAKEWORLD"},
  63         {0, NULL}
  64 };
  65
  66 static mempool_t *sv2csqc = NULL;
  67 int csqc_clent = 0;
  68 sizebuf_t *sv2csqcbuf = NULL;
  69 static unsigned char *sv2csqcents_version[MAX_SCOREBOARD];
  70
  71 static entity_frame_t deltaframe; // FIXME?
  72 static entity_frame_t framedata; // FIXME?
  73
  74 int entityframe5_prioritychaincounts[E5_PROTOCOL_PRIORITYLEVELS];
  75 unsigned short entityframe5_prioritychains[E5_PROTOCOL_PRIORITYLEVELS][ENTITYFRAME5_MAXSTATES];
  76
  77 protocolversion_t Protocol_EnumForName(const char *s)
  78 {
  79         int i;
  80         for (i = 1;protocolversioninfo[i].name;i++)
  81                 if (!strcasecmp(s, protocolversioninfo[i].name))
  82                         return (protocolversion_t)i;
  83         return PROTOCOL_UNKNOWN;
  84 }
  85
  86 const char *Protocol_NameForEnum(protocolversion_t p)
  87 {
  88         return protocolversioninfo[p].name;
  89 }
  90
  91 protocolversion_t Protocol_EnumForNumber(int n)
  92 {
  93         int i;
  94         for (i = 1;protocolversioninfo[i].name;i++)
  95                 if (protocolversioninfo[i].number == n)
  96                         return (protocolversion_t)i;
  97         return PROTOCOL_UNKNOWN;
  98 }
  99
 100 int Protocol_NumberForEnum(protocolversion_t p)
 101 {
 102         return protocolversioninfo[p].number;
 103 }
 104
 105 void Protocol_Names(char *buffer, size_t buffersize)
 106 {
 107         int i;
 108         if (buffersize < 1)
 109                 return;
 110         buffer[0] = 0;
 111         for (i = 1;protocolversioninfo[i].name;i++)
 112         {
 113                 if (i > 1)
 114                         strlcat(buffer, " ", sizeof(buffer));
 115                 strlcat(buffer, protocolversioninfo[i].name, sizeof(buffer));
 116         }
 117 }
 118
 119 void EntityFrameQuake_ReadEntity(int bits)
 120 {
 121         int num;
 122         entity_t *ent;
 123         entity_state_t s;
 124
 125         if (bits & U_MOREBITS)
 126                 bits |= (MSG_ReadByte()<<8);
 127         if ((bits & U_EXTEND1) && cls.protocol != PROTOCOL_NEHAHRAMOVIE)
 128         {
 129                 bits |= MSG_ReadByte() << 16;
 130                 if (bits & U_EXTEND2)
 131                         bits |= MSG_ReadByte() << 24;
 132         }
 133
 134         if (bits & U_LONGENTITY)
 135                 num = (unsigned short) MSG_ReadShort ();
 136         else
 137                 num = MSG_ReadByte ();
 138
 139         if (num >= MAX_EDICTS)
 140                 Host_Error("EntityFrameQuake_ReadEntity: entity number (%i) >= MAX_EDICTS (%i)", num, MAX_EDICTS);
 141         if (num < 1)
 142                 Host_Error("EntityFrameQuake_ReadEntity: invalid entity number (%i)", num);
 143
 144         if (cl.num_entities <= num)
 145         {
 146                 cl.num_entities = num + 1;
 147                 if (num >= cl.max_entities)
 148                         CL_ExpandEntities(num);
 149         }
 150
 151         ent = cl.entities + num;
 152
 153         // note: this inherits the 'active' state of the baseline chosen
 154         // (state_baseline is always active, state_current may not be active if
 155         // the entity was missing in the last frame)
 156         if (bits & U_DELTA)
 157                 s = ent->state_current;
 158         else
 159         {
 160                 s = ent->state_baseline;
 161                 s.active = true;
 162         }
 163
 164         cl.isquakeentity[num] = true;
 165         if (cl.lastquakeentity < num)
 166                 cl.lastquakeentity = num;
 167         s.number = num;
 168         s.time = cl.mtime[0];
 169         s.flags = 0;
 170         if (bits & U_MODEL)             s.modelindex = (s.modelindex & 0xFF00) | MSG_ReadByte();
 171         if (bits & U_FRAME)             s.frame = (s.frame & 0xFF00) | MSG_ReadByte();
 172         if (bits & U_COLORMAP)  s.colormap = MSG_ReadByte();
 173         if (bits & U_SKIN)              s.skin = MSG_ReadByte();
 174         if (bits & U_EFFECTS)   s.effects = (s.effects & 0xFF00) | MSG_ReadByte();
 175         if (bits & U_ORIGIN1)   s.origin[0] = MSG_ReadCoord(cls.protocol);
 176         if (bits & U_ANGLE1)    s.angles[0] = MSG_ReadAngle(cls.protocol);
 177         if (bits & U_ORIGIN2)   s.origin[1] = MSG_ReadCoord(cls.protocol);
 178         if (bits & U_ANGLE2)    s.angles[1] = MSG_ReadAngle(cls.protocol);
 179         if (bits & U_ORIGIN3)   s.origin[2] = MSG_ReadCoord(cls.protocol);
 180         if (bits & U_ANGLE3)    s.angles[2] = MSG_ReadAngle(cls.protocol);
 181         if (bits & U_STEP)              s.flags |= RENDER_STEP;
 182         if (bits & U_ALPHA)             s.alpha = MSG_ReadByte();
 183         if (bits & U_SCALE)             s.scale = MSG_ReadByte();
 184         if (bits & U_EFFECTS2)  s.effects = (s.effects & 0x00FF) | (MSG_ReadByte() << 8);
 185         if (bits & U_GLOWSIZE)  s.glowsize = MSG_ReadByte();
 186         if (bits & U_GLOWCOLOR) s.glowcolor = MSG_ReadByte();
 187         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));}
 188         if (bits & U_GLOWTRAIL) s.flags |= RENDER_GLOWTRAIL;
 189         if (bits & U_FRAME2)    s.frame = (s.frame & 0x00FF) | (MSG_ReadByte() << 8);
 190         if (bits & U_MODEL2)    s.modelindex = (s.modelindex & 0x00FF) | (MSG_ReadByte() << 8);
 191         if (bits & U_VIEWMODEL) s.flags |= RENDER_VIEWMODEL;
 192         if (bits & U_EXTERIORMODEL)     s.flags |= RENDER_EXTERIORMODEL;
 193
 194         // LordHavoc: to allow playback of the Nehahra movie
 195         if (cls.protocol == PROTOCOL_NEHAHRAMOVIE && (bits & U_EXTEND1))
 196         {
 197                 // LordHavoc: evil format
 198                 int i = (int)MSG_ReadFloat();
 199                 int j = (int)(MSG_ReadFloat() * 255.0f);
 200                 if (i == 2)
 201                 {
 202                         i = (int)MSG_ReadFloat();
 203                         if (i)
 204                                 s.effects |= EF_FULLBRIGHT;
 205                 }
 206                 if (j < 0)
 207                         s.alpha = 0;
 208                 else if (j == 0 || j >= 255)
 209                         s.alpha = 255;
 210                 else
 211                         s.alpha = j;
 212         }
 213
 214         ent->state_previous = ent->state_current;
 215         ent->state_current = s;
 216         if (ent->state_current.active)
 217         {
 218                 CL_MoveLerpEntityStates(ent);
 219                 cl.entities_active[ent->state_current.number] = true;
 220         }
 221
 222         if (msg_badread)
 223                 Host_Error("EntityFrameQuake_ReadEntity: read error");
 224 }
 225
 226 void EntityFrameQuake_ISeeDeadEntities(void)
 227 {
 228         int num, lastentity;
 229         if (cl.lastquakeentity == 0)
 230                 return;
 231         lastentity = cl.lastquakeentity;
 232         cl.lastquakeentity = 0;
 233         for (num = 0;num <= lastentity;num++)
 234         {
 235                 if (cl.isquakeentity[num])
 236                 {
 237                         if (cl.entities_active[num] && cl.entities[num].state_current.time == cl.mtime[0])
 238                         {
 239                                 cl.isquakeentity[num] = true;
 240                                 cl.lastquakeentity = num;
 241                         }
 242                         else
 243                         {
 244                                 cl.isquakeentity[num] = false;
 245                                 cl.entities_active[num] = false;
 246                                 cl.entities[num].state_current = defaultstate;
 247                                 cl.entities[num].state_current.number = num;
 248                         }
 249                 }
 250         }
 251 }
 252
 253 void EntityFrameCSQC_ClearVersions (void)
 254 {
 255         if(sv2csqc)
 256         {
 257                 Mem_FreePool(&sv2csqc);
 258                 sv2csqc = NULL;
 259         }
 260         memset(sv2csqcents_version, 0, MAX_SCOREBOARD*sizeof(unsigned char *));
 261 }
 262
 263 void EntityFrameCSQC_InitClientVersions (int client, qboolean clear)
 264 {
 265         if(!sv2csqc)
 266                 sv2csqc = Mem_AllocPool("SV2CSQC", 0, NULL);
 267         if(sv2csqcents_version[client])
 268         {
 269                 Mem_Free(sv2csqcents_version[client]);
 270                 sv2csqcents_version[client] = NULL;
 271         }
 272         sv2csqcents_version[client] = (unsigned char *)Mem_Alloc(sv2csqc, MAX_EDICTS);
 273         memset(sv2csqcents_version[client], 0, MAX_EDICTS);
 274 }
 275
 276 //[515]: we use only one array per-client for SendEntity feature
 277 void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int numstates, const entity_state_t *states)
 278 {
 279         sizebuf_t                               buf;
 280         unsigned char                                   data[2048];
 281         const entity_state_t    *s;
 282         unsigned short                  i, t, t2, t0;
 283         prvm_eval_t                             *val, *val2;
 284         int                                             csqcents = 0;
 285
 286         if(prog->fieldoffsets.SendEntity < 0 || prog->fieldoffsets.Version < 0)
 287                 return;
 288         --csqc_clent;
 289         if(!sv2csqcents_version[csqc_clent])
 290                 EntityFrameCSQC_InitClientVersions(csqc_clent, false);
 291
 292         for (csqcents = i = 0, s = states;i < numstates;i++, s++)
 293         {
 294                 //[515]: entities remove
 295                 if(i+1 >= numstates)
 296                         t2 = prog->num_edicts;
 297                 else
 298                         t2 = states[i+1].number;
 299                 if(!i)
 300                 {
 301                         t0 = 1;
 302                         t2 = s->number;
 303                 }
 304                 else
 305                         t0 = s->number+1;
 306                 for(t=t0; t<t2 ;t++)
 307                         if(sv2csqcents_version[csqc_clent][t])
 308                         {
 309                                 if(!csqcents)
 310                                 {
 311                                         csqcents = 1;
 312                                         memset(&buf, 0, sizeof(buf));
 313                                         buf.data = data;
 314                                         buf.maxsize = sizeof(data);
 315                                         sv2csqcbuf = &buf;
 316                                         SZ_Clear(&buf);
 317                                         MSG_WriteByte(&buf, svc_csqcentities);
 318                                 }
 319                                 sv2csqcents_version[csqc_clent][t] = 0;
 320                                 MSG_WriteShort(&buf, (unsigned short)t | 0x8000);
 321                                 csqcents++;
 322                         }
 323                 //[515]: entities remove
 324
 325 //              if(!s->active)
 326 //                      continue;
 327                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
 328                 if(val->function)
 329                 {
 330                         val2 = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.Version);
 331                         if(sv2csqcents_version[csqc_clent][s->number] == (unsigned char)val2->_float)
 332                                 continue;
 333                         if(!csqcents)
 334                         {
 335                                 csqcents = 1;
 336                                 memset(&buf, 0, sizeof(buf));
 337                                 buf.data = data;
 338                                 buf.maxsize = sizeof(data);
 339                                 sv2csqcbuf = &buf;
 340                                 SZ_Clear(&buf);
 341                                 MSG_WriteByte(&buf, svc_csqcentities);
 342                         }
 343                         if((unsigned char)val2->_float == 0)
 344                                 val2->_float = 1;
 345                         MSG_WriteShort(&buf, s->number);
 346                         ((int *)prog->globals.generic)[OFS_PARM0] = csqc_clent+1;
 347                         prog->globals.server->self = s->number;
 348                         PRVM_ExecuteProgram(val->function, "Null SendEntity\n");
 349                         if(!prog->globals.generic[OFS_RETURN])
 350                         {
 351                                 buf.cursize -= 2;
 352                                 if(sv2csqcents_version[csqc_clent][s->number])
 353                                 {
 354                                         sv2csqcents_version[csqc_clent][s->number] = 0;
 355                                         MSG_WriteShort(&buf, (unsigned short)s->number | 0x8000);
 356                                         csqcents++;
 357                                 }
 358                         }
 359                         else
 360                         {
 361                                 sv2csqcents_version[csqc_clent][s->number] = (unsigned char)val2->_float;
 362                                 csqcents++;
 363                         }
 364                         if (msg->cursize + buf.cursize > msg->maxsize)
 365                                 break;
 366                 }
 367         }
 368         if(csqcents)
 369         {
 370                 if(csqcents > 1)
 371                 {
 372                         MSG_WriteShort(&buf, 0);
 373                         SZ_Write(msg, buf.data, buf.cursize);
 374                 }
 375                 sv2csqcbuf = NULL;
 376         }
 377 }
 378
 379 void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int numstates, const entity_state_t *states)
 380 {
 381         const entity_state_t *s;
 382         entity_state_t baseline;
 383         int i, bits;
 384         sizebuf_t buf;
 385         unsigned char data[128];
 386         prvm_eval_t *val;
 387
 388         // prepare the buffer
 389         memset(&buf, 0, sizeof(buf));
 390         buf.data = data;
 391         buf.maxsize = sizeof(data);
 392
 393         for (i = 0, s = states;i < numstates;i++, s++)
 394         {
 395                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
 396                 if(val && val->function)
 397                         continue;
 398
 399                 // prepare the buffer
 400                 SZ_Clear(&buf);
 401
 402 // send an update
 403                 bits = 0;
 404                 if (s->number >= 256)
 405                         bits |= U_LONGENTITY;
 406                 if (s->flags & RENDER_STEP)
 407                         bits |= U_STEP;
 408                 if (s->flags & RENDER_VIEWMODEL)
 409                         bits |= U_VIEWMODEL;
 410                 if (s->flags & RENDER_GLOWTRAIL)
 411                         bits |= U_GLOWTRAIL;
 412                 if (s->flags & RENDER_EXTERIORMODEL)
 413                         bits |= U_EXTERIORMODEL;
 414
 415                 // LordHavoc: old stuff, but rewritten to have more exact tolerances
 416                 baseline = prog->edicts[s->number].priv.server->baseline;
 417                 if (baseline.origin[0] != s->origin[0])
 418                         bits |= U_ORIGIN1;
 419                 if (baseline.origin[1] != s->origin[1])
 420                         bits |= U_ORIGIN2;
 421                 if (baseline.origin[2] != s->origin[2])
 422                         bits |= U_ORIGIN3;
 423                 if (baseline.angles[0] != s->angles[0])
 424                         bits |= U_ANGLE1;
 425                 if (baseline.angles[1] != s->angles[1])
 426                         bits |= U_ANGLE2;
 427                 if (baseline.angles[2] != s->angles[2])
 428                         bits |= U_ANGLE3;
 429                 if (baseline.colormap != s->colormap)
 430                         bits |= U_COLORMAP;
 431                 if (baseline.skin != s->skin)
 432                         bits |= U_SKIN;
 433                 if (baseline.frame != s->frame)
 434                 {
 435                         bits |= U_FRAME;
 436                         if (s->frame & 0xFF00)
 437                                 bits |= U_FRAME2;
 438                 }
 439                 if (baseline.effects != s->effects)
 440                 {
 441                         bits |= U_EFFECTS;
 442                         if (s->effects & 0xFF00)
 443                                 bits |= U_EFFECTS2;
 444                 }
 445                 if (baseline.modelindex != s->modelindex)
 446                 {
 447                         bits |= U_MODEL;
 448                         if (s->modelindex & 0xFF00)
 449                                 bits |= U_MODEL2;
 450                 }
 451                 if (baseline.alpha != s->alpha)
 452                         bits |= U_ALPHA;
 453                 if (baseline.scale != s->scale)
 454                         bits |= U_SCALE;
 455                 if (baseline.glowsize != s->glowsize)
 456                         bits |= U_GLOWSIZE;
 457                 if (baseline.glowcolor != s->glowcolor)
 458                         bits |= U_GLOWCOLOR;
 459
 460                 // if extensions are disabled, clear the relevant update flags
 461                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 462                         bits &= 0x7FFF;
 463                 if (sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 464                         if (s->alpha != 255 || s->effects & EF_FULLBRIGHT)
 465                                 bits |= U_EXTEND1;
 466
 467                 // write the message
 468                 if (bits >= 16777216)
 469                         bits |= U_EXTEND2;
 470                 if (bits >= 65536)
 471                         bits |= U_EXTEND1;
 472                 if (bits >= 256)
 473                         bits |= U_MOREBITS;
 474                 bits |= U_SIGNAL;
 475
 476                 MSG_WriteByte (&buf, bits);
 477                 if (bits & U_MOREBITS)          MSG_WriteByte(&buf, bits>>8);
 478                 if (bits & U_EXTEND1)           MSG_WriteByte(&buf, bits>>16);
 479                 if (bits & U_EXTEND2)           MSG_WriteByte(&buf, bits>>24);
 480                 if (bits & U_LONGENTITY)        MSG_WriteShort(&buf, s->number);
 481                 else                                            MSG_WriteByte(&buf, s->number);
 482
 483                 if (bits & U_MODEL)                     MSG_WriteByte(&buf, s->modelindex);
 484                 if (bits & U_FRAME)                     MSG_WriteByte(&buf, s->frame);
 485                 if (bits & U_COLORMAP)          MSG_WriteByte(&buf, s->colormap);
 486                 if (bits & U_SKIN)                      MSG_WriteByte(&buf, s->skin);
 487                 if (bits & U_EFFECTS)           MSG_WriteByte(&buf, s->effects);
 488                 if (bits & U_ORIGIN1)           MSG_WriteCoord(&buf, s->origin[0], sv.protocol);
 489                 if (bits & U_ANGLE1)            MSG_WriteAngle(&buf, s->angles[0], sv.protocol);
 490                 if (bits & U_ORIGIN2)           MSG_WriteCoord(&buf, s->origin[1], sv.protocol);
 491                 if (bits & U_ANGLE2)            MSG_WriteAngle(&buf, s->angles[1], sv.protocol);
 492                 if (bits & U_ORIGIN3)           MSG_WriteCoord(&buf, s->origin[2], sv.protocol);
 493                 if (bits & U_ANGLE3)            MSG_WriteAngle(&buf, s->angles[2], sv.protocol);
 494                 if (bits & U_ALPHA)                     MSG_WriteByte(&buf, s->alpha);
 495                 if (bits & U_SCALE)                     MSG_WriteByte(&buf, s->scale);
 496                 if (bits & U_EFFECTS2)          MSG_WriteByte(&buf, s->effects >> 8);
 497                 if (bits & U_GLOWSIZE)          MSG_WriteByte(&buf, s->glowsize);
 498                 if (bits & U_GLOWCOLOR)         MSG_WriteByte(&buf, s->glowcolor);
 499                 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);}
 500                 if (bits & U_FRAME2)            MSG_WriteByte(&buf, s->frame >> 8);
 501                 if (bits & U_MODEL2)            MSG_WriteByte(&buf, s->modelindex >> 8);
 502
 503                 // the nasty protocol
 504                 if ((bits & U_EXTEND1) && sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 505                 {
 506                         if (s->effects & EF_FULLBRIGHT)
 507                         {
 508                                 MSG_WriteFloat(&buf, 2); // QSG protocol version
 509                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
 510                                 MSG_WriteFloat(&buf, 1); // fullbright
 511                         }
 512                         else
 513                         {
 514                                 MSG_WriteFloat(&buf, 1); // QSG protocol version
 515                                 MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
 516                         }
 517                 }
 518
 519                 // if the commit is full, we're done this frame
 520                 if (msg->cursize + buf.cursize > msg->maxsize)
 521                 {
 522                         // next frame we will continue where we left off
 523                         break;
 524                 }
 525                 // write the message to the packet
 526                 SZ_Write(msg, buf.data, buf.cursize);
 527         }
 528 }
 529
 530 int EntityState_DeltaBits(const entity_state_t *o, const entity_state_t *n)
 531 {
 532         unsigned int bits;
 533         // if o is not active, delta from default
 534         if (!o->active)
 535                 o = &defaultstate;
 536         bits = 0;
 537         if (fabs(n->origin[0] - o->origin[0]) > (1.0f / 256.0f))
 538                 bits |= E_ORIGIN1;
 539         if (fabs(n->origin[1] - o->origin[1]) > (1.0f / 256.0f))
 540                 bits |= E_ORIGIN2;
 541         if (fabs(n->origin[2] - o->origin[2]) > (1.0f / 256.0f))
 542                 bits |= E_ORIGIN3;
 543         if ((unsigned char) (n->angles[0] * (256.0f / 360.0f)) != (unsigned char) (o->angles[0] * (256.0f / 360.0f)))
 544                 bits |= E_ANGLE1;
 545         if ((unsigned char) (n->angles[1] * (256.0f / 360.0f)) != (unsigned char) (o->angles[1] * (256.0f / 360.0f)))
 546                 bits |= E_ANGLE2;
 547         if ((unsigned char) (n->angles[2] * (256.0f / 360.0f)) != (unsigned char) (o->angles[2] * (256.0f / 360.0f)))
 548                 bits |= E_ANGLE3;
 549         if ((n->modelindex ^ o->modelindex) & 0x00FF)
 550                 bits |= E_MODEL1;
 551         if ((n->modelindex ^ o->modelindex) & 0xFF00)
 552                 bits |= E_MODEL2;
 553         if ((n->frame ^ o->frame) & 0x00FF)
 554                 bits |= E_FRAME1;
 555         if ((n->frame ^ o->frame) & 0xFF00)
 556                 bits |= E_FRAME2;
 557         if ((n->effects ^ o->effects) & 0x00FF)
 558                 bits |= E_EFFECTS1;
 559         if ((n->effects ^ o->effects) & 0xFF00)
 560                 bits |= E_EFFECTS2;
 561         if (n->colormap != o->colormap)
 562                 bits |= E_COLORMAP;
 563         if (n->skin != o->skin)
 564                 bits |= E_SKIN;
 565         if (n->alpha != o->alpha)
 566                 bits |= E_ALPHA;
 567         if (n->scale != o->scale)
 568                 bits |= E_SCALE;
 569         if (n->glowsize != o->glowsize)
 570                 bits |= E_GLOWSIZE;
 571         if (n->glowcolor != o->glowcolor)
 572                 bits |= E_GLOWCOLOR;
 573         if (n->flags != o->flags)
 574                 bits |= E_FLAGS;
 575         if (n->tagindex != o->tagindex || n->tagentity != o->tagentity)
 576                 bits |= E_TAGATTACHMENT;
 577         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])
 578                 bits |= E_LIGHT;
 579         if (n->lightstyle != o->lightstyle)
 580                 bits |= E_LIGHTSTYLE;
 581         if (n->lightpflags != o->lightpflags)
 582                 bits |= E_LIGHTPFLAGS;
 583
 584         if (bits)
 585         {
 586                 if (bits &  0xFF000000)
 587                         bits |= 0x00800000;
 588                 if (bits &  0x00FF0000)
 589                         bits |= 0x00008000;
 590                 if (bits &  0x0000FF00)
 591                         bits |= 0x00000080;
 592         }
 593         return bits;
 594 }
 595
 596 void EntityState_WriteExtendBits(sizebuf_t *msg, unsigned int bits)
 597 {
 598         MSG_WriteByte(msg, bits & 0xFF);
 599         if (bits & 0x00000080)
 600         {
 601                 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
 602                 if (bits & 0x00008000)
 603                 {
 604                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
 605                         if (bits & 0x00800000)
 606                                 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
 607                 }
 608         }
 609 }
 610
 611 void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned int bits)
 612 {
 613         if (sv.protocol == PROTOCOL_DARKPLACES2)
 614         {
 615                 if (bits & E_ORIGIN1)
 616                         MSG_WriteCoord16i(msg, ent->origin[0]);
 617                 if (bits & E_ORIGIN2)
 618                         MSG_WriteCoord16i(msg, ent->origin[1]);
 619                 if (bits & E_ORIGIN3)
 620                         MSG_WriteCoord16i(msg, ent->origin[2]);
 621         }
 622         else
 623         {
 624                 // LordHavoc: have to write flags first, as they can modify protocol
 625                 if (bits & E_FLAGS)
 626                         MSG_WriteByte(msg, ent->flags);
 627                 if (ent->flags & RENDER_LOWPRECISION)
 628                 {
 629                         if (bits & E_ORIGIN1)
 630                                 MSG_WriteCoord16i(msg, ent->origin[0]);
 631                         if (bits & E_ORIGIN2)
 632                                 MSG_WriteCoord16i(msg, ent->origin[1]);
 633                         if (bits & E_ORIGIN3)
 634                                 MSG_WriteCoord16i(msg, ent->origin[2]);
 635                 }
 636                 else
 637                 {
 638                         if (bits & E_ORIGIN1)
 639                                 MSG_WriteCoord32f(msg, ent->origin[0]);
 640                         if (bits & E_ORIGIN2)
 641                                 MSG_WriteCoord32f(msg, ent->origin[1]);
 642                         if (bits & E_ORIGIN3)
 643                                 MSG_WriteCoord32f(msg, ent->origin[2]);
 644                 }
 645         }
 646         if ((sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4) && (ent->flags & RENDER_LOWPRECISION))
 647         {
 648                 if (bits & E_ANGLE1)
 649                         MSG_WriteAngle8i(msg, ent->angles[0]);
 650                 if (bits & E_ANGLE2)
 651                         MSG_WriteAngle8i(msg, ent->angles[1]);
 652                 if (bits & E_ANGLE3)
 653                         MSG_WriteAngle8i(msg, ent->angles[2]);
 654         }
 655         else
 656         {
 657                 if (bits & E_ANGLE1)
 658                         MSG_WriteAngle16i(msg, ent->angles[0]);
 659                 if (bits & E_ANGLE2)
 660                         MSG_WriteAngle16i(msg, ent->angles[1]);
 661                 if (bits & E_ANGLE3)
 662                         MSG_WriteAngle16i(msg, ent->angles[2]);
 663         }
 664         if (bits & E_MODEL1)
 665                 MSG_WriteByte(msg, ent->modelindex & 0xFF);
 666         if (bits & E_MODEL2)
 667                 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
 668         if (bits & E_FRAME1)
 669                 MSG_WriteByte(msg, ent->frame & 0xFF);
 670         if (bits & E_FRAME2)
 671                 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
 672         if (bits & E_EFFECTS1)
 673                 MSG_WriteByte(msg, ent->effects & 0xFF);
 674         if (bits & E_EFFECTS2)
 675                 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
 676         if (bits & E_COLORMAP)
 677                 MSG_WriteByte(msg, ent->colormap);
 678         if (bits & E_SKIN)
 679                 MSG_WriteByte(msg, ent->skin);
 680         if (bits & E_ALPHA)
 681                 MSG_WriteByte(msg, ent->alpha);
 682         if (bits & E_SCALE)
 683                 MSG_WriteByte(msg, ent->scale);
 684         if (bits & E_GLOWSIZE)
 685                 MSG_WriteByte(msg, ent->glowsize);
 686         if (bits & E_GLOWCOLOR)
 687                 MSG_WriteByte(msg, ent->glowcolor);
 688         if (sv.protocol == PROTOCOL_DARKPLACES2)
 689                 if (bits & E_FLAGS)
 690                         MSG_WriteByte(msg, ent->flags);
 691         if (bits & E_TAGATTACHMENT)
 692         {
 693                 MSG_WriteShort(msg, ent->tagentity);
 694                 MSG_WriteByte(msg, ent->tagindex);
 695         }
 696         if (bits & E_LIGHT)
 697         {
 698                 MSG_WriteShort(msg, ent->light[0]);
 699                 MSG_WriteShort(msg, ent->light[1]);
 700                 MSG_WriteShort(msg, ent->light[2]);
 701                 MSG_WriteShort(msg, ent->light[3]);
 702         }
 703         if (bits & E_LIGHTSTYLE)
 704                 MSG_WriteByte(msg, ent->lightstyle);
 705         if (bits & E_LIGHTPFLAGS)
 706                 MSG_WriteByte(msg, ent->lightpflags);
 707 }
 708
 709 void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
 710 {
 711         unsigned int bits;
 712         if (ent->active)
 713         {
 714                 // entity is active, check for changes from the delta
 715                 if ((bits = EntityState_DeltaBits(delta, ent)))
 716                 {
 717                         // write the update number, bits, and fields
 718                         MSG_WriteShort(msg, ent->number);
 719                         EntityState_WriteExtendBits(msg, bits);
 720                         EntityState_WriteFields(ent, msg, bits);
 721                 }
 722         }
 723         else
 724         {
 725                 // entity is inactive, check if the delta was active
 726                 if (delta->active)
 727                 {
 728                         // write the remove number
 729                         MSG_WriteShort(msg, ent->number | 0x8000);
 730                 }
 731         }
 732 }
 733
 734 int EntityState_ReadExtendBits(void)
 735 {
 736         unsigned int bits;
 737         bits = MSG_ReadByte();
 738         if (bits & 0x00000080)
 739         {
 740                 bits |= MSG_ReadByte() << 8;
 741                 if (bits & 0x00008000)
 742                 {
 743                         bits |= MSG_ReadByte() << 16;
 744                         if (bits & 0x00800000)
 745                                 bits |= MSG_ReadByte() << 24;
 746                 }
 747         }
 748         return bits;
 749 }
 750
 751 void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
 752 {
 753         if (cls.protocol == PROTOCOL_DARKPLACES2)
 754         {
 755                 if (bits & E_ORIGIN1)
 756                         e->origin[0] = MSG_ReadCoord16i();
 757                 if (bits & E_ORIGIN2)
 758                         e->origin[1] = MSG_ReadCoord16i();
 759                 if (bits & E_ORIGIN3)
 760                         e->origin[2] = MSG_ReadCoord16i();
 761         }
 762         else
 763         {
 764                 if (bits & E_FLAGS)
 765                         e->flags = MSG_ReadByte();
 766                 if (e->flags & RENDER_LOWPRECISION)
 767                 {
 768                         if (bits & E_ORIGIN1)
 769                                 e->origin[0] = MSG_ReadCoord16i();
 770                         if (bits & E_ORIGIN2)
 771                                 e->origin[1] = MSG_ReadCoord16i();
 772                         if (bits & E_ORIGIN3)
 773                                 e->origin[2] = MSG_ReadCoord16i();
 774                 }
 775                 else
 776                 {
 777                         if (bits & E_ORIGIN1)
 778                                 e->origin[0] = MSG_ReadCoord32f();
 779                         if (bits & E_ORIGIN2)
 780                                 e->origin[1] = MSG_ReadCoord32f();
 781                         if (bits & E_ORIGIN3)
 782                                 e->origin[2] = MSG_ReadCoord32f();
 783                 }
 784         }
 785         if ((cls.protocol == PROTOCOL_DARKPLACES5 || cls.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
 786         {
 787                 if (bits & E_ANGLE1)
 788                         e->angles[0] = MSG_ReadAngle16i();
 789                 if (bits & E_ANGLE2)
 790                         e->angles[1] = MSG_ReadAngle16i();
 791                 if (bits & E_ANGLE3)
 792                         e->angles[2] = MSG_ReadAngle16i();
 793         }
 794         else
 795         {
 796                 if (bits & E_ANGLE1)
 797                         e->angles[0] = MSG_ReadAngle8i();
 798                 if (bits & E_ANGLE2)
 799                         e->angles[1] = MSG_ReadAngle8i();
 800                 if (bits & E_ANGLE3)
 801                         e->angles[2] = MSG_ReadAngle8i();
 802         }
 803         if (bits & E_MODEL1)
 804                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
 805         if (bits & E_MODEL2)
 806                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 807         if (bits & E_FRAME1)
 808                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
 809         if (bits & E_FRAME2)
 810                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 811         if (bits & E_EFFECTS1)
 812                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
 813         if (bits & E_EFFECTS2)
 814                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 815         if (bits & E_COLORMAP)
 816                 e->colormap = MSG_ReadByte();
 817         if (bits & E_SKIN)
 818                 e->skin = MSG_ReadByte();
 819         if (bits & E_ALPHA)
 820                 e->alpha = MSG_ReadByte();
 821         if (bits & E_SCALE)
 822                 e->scale = MSG_ReadByte();
 823         if (bits & E_GLOWSIZE)
 824                 e->glowsize = MSG_ReadByte();
 825         if (bits & E_GLOWCOLOR)
 826                 e->glowcolor = MSG_ReadByte();
 827         if (cls.protocol == PROTOCOL_DARKPLACES2)
 828                 if (bits & E_FLAGS)
 829                         e->flags = MSG_ReadByte();
 830         if (bits & E_TAGATTACHMENT)
 831         {
 832                 e->tagentity = (unsigned short) MSG_ReadShort();
 833                 e->tagindex = MSG_ReadByte();
 834         }
 835         if (bits & E_LIGHT)
 836         {
 837                 e->light[0] = (unsigned short) MSG_ReadShort();
 838                 e->light[1] = (unsigned short) MSG_ReadShort();
 839                 e->light[2] = (unsigned short) MSG_ReadShort();
 840                 e->light[3] = (unsigned short) MSG_ReadShort();
 841         }
 842         if (bits & E_LIGHTSTYLE)
 843                 e->lightstyle = MSG_ReadByte();
 844         if (bits & E_LIGHTPFLAGS)
 845                 e->lightpflags = MSG_ReadByte();
 846
 847         if (developer_networkentities.integer >= 2)
 848         {
 849                 Con_Printf("ReadFields e%i", e->number);
 850
 851                 if (bits & E_ORIGIN1)
 852                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
 853                 if (bits & E_ORIGIN2)
 854                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
 855                 if (bits & E_ORIGIN3)
 856                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
 857                 if (bits & E_ANGLE1)
 858                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
 859                 if (bits & E_ANGLE2)
 860                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
 861                 if (bits & E_ANGLE3)
 862                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
 863                 if (bits & (E_MODEL1 | E_MODEL2))
 864                         Con_Printf(" E_MODEL %i", e->modelindex);
 865
 866                 if (bits & (E_FRAME1 | E_FRAME2))
 867                         Con_Printf(" E_FRAME %i", e->frame);
 868                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
 869                         Con_Printf(" E_EFFECTS %i", e->effects);
 870                 if (bits & E_ALPHA)
 871                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
 872                 if (bits & E_SCALE)
 873                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
 874                 if (bits & E_COLORMAP)
 875                         Con_Printf(" E_COLORMAP %i", e->colormap);
 876                 if (bits & E_SKIN)
 877                         Con_Printf(" E_SKIN %i", e->skin);
 878
 879                 if (bits & E_GLOWSIZE)
 880                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
 881                 if (bits & E_GLOWCOLOR)
 882                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
 883
 884                 if (bits & E_LIGHT)
 885                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
 886                 if (bits & E_LIGHTPFLAGS)
 887                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
 888
 889                 if (bits & E_TAGATTACHMENT)
 890                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
 891                 if (bits & E_LIGHTSTYLE)
 892                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
 893                 Con_Print("\n");
 894         }
 895 }
 896
 897 // (client and server) allocates a new empty database
 898 entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
 899 {
 900         return (entityframe_database_t *)Mem_Alloc(mempool, sizeof(entityframe_database_t));
 901 }
 902
 903 // (client and server) frees the database
 904 void EntityFrame_FreeDatabase(entityframe_database_t *d)
 905 {
 906         Mem_Free(d);
 907 }
 908
 909 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
 910 void EntityFrame_ClearDatabase(entityframe_database_t *d)
 911 {
 912         memset(d, 0, sizeof(*d));
 913 }
 914
 915 // (server and client) removes frames older than 'frame' from database
 916 void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
 917 {
 918         int i;
 919         d->ackframenum = frame;
 920         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
 921         // ignore outdated frame acks (out of order packets)
 922         if (i == 0)
 923                 return;
 924         d->numframes -= i;
 925         // if some queue is left, slide it down to beginning of array
 926         if (d->numframes)
 927                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
 928 }
 929
 930 // (server) clears frame, to prepare for adding entities
 931 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
 932 {
 933         f->time = 0;
 934         f->framenum = framenum;
 935         f->numentities = 0;
 936         if (eye == NULL)
 937                 VectorClear(f->eye);
 938         else
 939                 VectorCopy(eye, f->eye);
 940 }
 941
 942 // (server and client) reads a frame from the database
 943 void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
 944 {
 945         int i, n;
 946         EntityFrame_Clear(f, NULL, -1);
 947         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
 948         if (i < d->numframes && framenum == d->frames[i].framenum)
 949         {
 950                 f->framenum = framenum;
 951                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
 952                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
 953                 if (n > f->numentities)
 954                         n = f->numentities;
 955                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
 956                 if (f->numentities > n)
 957                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
 958                 VectorCopy(d->eye, f->eye);
 959         }
 960 }
 961
 962 // (server and client) adds a entity_frame to the database, for future reference
 963 void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
 964 {
 965         int n, e;
 966         entity_frameinfo_t *info;
 967
 968         VectorCopy(eye, d->eye);
 969
 970         // figure out how many entity slots are used already
 971         if (d->numframes)
 972         {
 973                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
 974                 if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
 975                 {
 976                         // ran out of room, dump database
 977                         EntityFrame_ClearDatabase(d);
 978                 }
 979         }
 980
 981         info = &d->frames[d->numframes];
 982         info->framenum = framenum;
 983         e = -1000;
 984         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
 985         for (n = 0;n <= d->numframes;n++)
 986         {
 987                 if (e >= d->frames[n].framenum)
 988                 {
 989                         if (e == framenum)
 990                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
 991                         else
 992                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
 993                         return;
 994                 }
 995                 e = d->frames[n].framenum;
 996         }
 997         // if database still has frames after that...
 998         if (d->numframes)
 999                 info->firstentity = d->frames[d->numframes - 1].endentity;
1000         else
1001                 info->firstentity = 0;
1002         info->endentity = info->firstentity + numentities;
1003         d->numframes++;
1004
1005         n = info->firstentity % MAX_ENTITY_DATABASE;
1006         e = MAX_ENTITY_DATABASE - n;
1007         if (e > numentities)
1008                 e = numentities;
1009         memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
1010         if (numentities > e)
1011                 memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
1012 }
1013
1014 // (server) writes a frame to network stream
1015 void EntityFrame_WriteFrame(sizebuf_t *msg, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
1016 {
1017         int i, onum, number;
1018         entity_frame_t *o = &deltaframe;
1019         const entity_state_t *ent, *delta;
1020         vec3_t eye;
1021         prvm_eval_t *val;
1022
1023         d->latestframenum++;
1024
1025         VectorClear(eye);
1026         for (i = 0;i < numstates;i++)
1027         {
1028                 if (states[i].number == viewentnum)
1029                 {
1030                         VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
1031                         break;
1032                 }
1033         }
1034
1035         EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
1036
1037         EntityFrame_FetchFrame(d, d->ackframenum, o);
1038
1039         MSG_WriteByte (msg, svc_entities);
1040         MSG_WriteLong (msg, o->framenum);
1041         MSG_WriteLong (msg, d->latestframenum);
1042         MSG_WriteFloat (msg, eye[0]);
1043         MSG_WriteFloat (msg, eye[1]);
1044         MSG_WriteFloat (msg, eye[2]);
1045
1046         onum = 0;
1047         for (i = 0;i < numstates;i++)
1048         {
1049                 ent = states + i;
1050                 number = ent->number;
1051
1052                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[number]), prog->fieldoffsets.SendEntity);
1053                 if(val && val->function)
1054                                 continue;
1055                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
1056                 {
1057                         // write remove message
1058                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1059                 }
1060                 if (onum < o->numentities && (o->entitydata[onum].number == number))
1061                 {
1062                         // delta from previous frame
1063                         delta = o->entitydata + onum;
1064                         // advance to next entity in delta frame
1065                         onum++;
1066                 }
1067                 else
1068                 {
1069                         // delta from defaults
1070                         delta = &defaultstate;
1071                 }
1072                 EntityState_WriteUpdate(ent, msg, delta);
1073         }
1074         for (;onum < o->numentities;onum++)
1075         {
1076                 // write remove message
1077                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
1078         }
1079         MSG_WriteShort(msg, 0xFFFF);
1080 }
1081
1082 // (client) reads a frame from network stream
1083 void EntityFrame_CL_ReadFrame(void)
1084 {
1085         int i, number, removed;
1086         entity_frame_t *f = &framedata, *delta = &deltaframe;
1087         entity_state_t *e, *old, *oldend;
1088         entity_t *ent;
1089         entityframe_database_t *d;
1090         if (!cl.entitydatabase)
1091                 cl.entitydatabase = EntityFrame_AllocDatabase(cls.levelmempool);
1092         d = cl.entitydatabase;
1093
1094         EntityFrame_Clear(f, NULL, -1);
1095
1096         // read the frame header info
1097         f->time = cl.mtime[0];
1098         number = MSG_ReadLong();
1099         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1100                 cl.latestframenums[i] = cl.latestframenums[i+1];
1101         cl.latestframenums[LATESTFRAMENUMS-1] = f->framenum = MSG_ReadLong();
1102         f->eye[0] = MSG_ReadFloat();
1103         f->eye[1] = MSG_ReadFloat();
1104         f->eye[2] = MSG_ReadFloat();
1105         EntityFrame_AckFrame(d, number);
1106         EntityFrame_FetchFrame(d, number, delta);
1107         old = delta->entitydata;
1108         oldend = old + delta->numentities;
1109         // read entities until we hit the magic 0xFFFF end tag
1110         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
1111         {
1112                 if (msg_badread)
1113                         Host_Error("EntityFrame_Read: read error");
1114                 removed = number & 0x8000;
1115                 number &= 0x7FFF;
1116                 if (number >= MAX_EDICTS)
1117                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)", number, MAX_EDICTS);
1118
1119                 // seek to entity, while copying any skipped entities (assume unchanged)
1120                 while (old < oldend && old->number < number)
1121                 {
1122                         if (f->numentities >= MAX_ENTITY_DATABASE)
1123                                 Host_Error("EntityFrame_Read: entity list too big");
1124                         f->entitydata[f->numentities] = *old++;
1125                         f->entitydata[f->numentities++].time = cl.mtime[0];
1126                 }
1127                 if (removed)
1128                 {
1129                         if (old < oldend && old->number == number)
1130                                 old++;
1131                         else
1132                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
1133                 }
1134                 else
1135                 {
1136                         if (f->numentities >= MAX_ENTITY_DATABASE)
1137                                 Host_Error("EntityFrame_Read: entity list too big");
1138
1139                         // reserve this slot
1140                         e = f->entitydata + f->numentities++;
1141
1142                         if (old < oldend && old->number == number)
1143                         {
1144                                 // delta from old entity
1145                                 *e = *old++;
1146                         }
1147                         else
1148                         {
1149                                 // delta from defaults
1150                                 *e = defaultstate;
1151                         }
1152
1153                         if (cl.num_entities <= number)
1154                         {
1155                                 cl.num_entities = number + 1;
1156                                 if (number >= cl.max_entities)
1157                                         CL_ExpandEntities(number);
1158                         }
1159                         cl.entities_active[number] = true;
1160                         e->active = true;
1161                         e->time = cl.mtime[0];
1162                         e->number = number;
1163                         EntityState_ReadFields(e, EntityState_ReadExtendBits());
1164                 }
1165         }
1166         while (old < oldend)
1167         {
1168                 if (f->numentities >= MAX_ENTITY_DATABASE)
1169                         Host_Error("EntityFrame_Read: entity list too big");
1170                 f->entitydata[f->numentities] = *old++;
1171                 f->entitydata[f->numentities++].time = cl.mtime[0];
1172         }
1173         EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
1174
1175         memset(cl.entities_active, 0, cl.num_entities * sizeof(unsigned char));
1176         number = 1;
1177         for (i = 0;i < f->numentities;i++)
1178         {
1179                 for (;number < f->entitydata[i].number && number < cl.num_entities;number++)
1180                 {
1181                         if (cl.entities_active[number])
1182                         {
1183                                 cl.entities_active[number] = false;
1184                                 cl.entities[number].state_current.active = false;
1185                         }
1186                 }
1187                 if (number >= cl.num_entities)
1188                         break;
1189                 // update the entity
1190                 ent = &cl.entities[number];
1191                 ent->state_previous = ent->state_current;
1192                 ent->state_current = f->entitydata[i];
1193                 CL_MoveLerpEntityStates(ent);
1194                 // the entity lives again...
1195                 cl.entities_active[number] = true;
1196                 number++;
1197         }
1198         for (;number < cl.num_entities;number++)
1199         {
1200                 if (cl.entities_active[number])
1201                 {
1202                         cl.entities_active[number] = false;
1203                         cl.entities[number].state_current.active = false;
1204                 }
1205         }
1206 }
1207
1208
1209 // (client) returns the frame number of the most recent frame recieved
1210 int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
1211 {
1212         if (d->numframes)
1213                 return d->frames[d->numframes - 1].framenum;
1214         else
1215                 return -1;
1216 }
1217
1218
1219
1220
1221
1222
1223 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
1224 {
1225         if (d->maxreferenceentities <= number)
1226         {
1227                 int oldmax = d->maxreferenceentities;
1228                 entity_state_t *oldentity = d->referenceentity;
1229                 d->maxreferenceentities = (number + 15) & ~7;
1230                 d->referenceentity = (entity_state_t *)Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
1231                 if (oldentity)
1232                 {
1233                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
1234                         Mem_Free(oldentity);
1235                 }
1236                 // clear the newly created entities
1237                 for (;oldmax < d->maxreferenceentities;oldmax++)
1238                 {
1239                         d->referenceentity[oldmax] = defaultstate;
1240                         d->referenceentity[oldmax].number = oldmax;
1241                 }
1242         }
1243         return d->referenceentity + number;
1244 }
1245
1246 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
1247 {
1248         // resize commit's entity list if full
1249         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
1250         {
1251                 entity_state_t *oldentity = d->currentcommit->entity;
1252                 d->currentcommit->maxentities += 8;
1253                 d->currentcommit->entity = (entity_state_t *)Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
1254                 if (oldentity)
1255                 {
1256                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
1257                         Mem_Free(oldentity);
1258                 }
1259         }
1260         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
1261 }
1262
1263 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
1264 {
1265         entityframe4_database_t *d;
1266         d = (entityframe4_database_t *)Mem_Alloc(pool, sizeof(*d));
1267         d->mempool = pool;
1268         EntityFrame4_ResetDatabase(d);
1269         return d;
1270 }
1271
1272 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
1273 {
1274         int i;
1275         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1276                 if (d->commit[i].entity)
1277                         Mem_Free(d->commit[i].entity);
1278         if (d->referenceentity)
1279                 Mem_Free(d->referenceentity);
1280         Mem_Free(d);
1281 }
1282
1283 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
1284 {
1285         int i;
1286         d->referenceframenum = -1;
1287         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1288                 d->commit[i].numentities = 0;
1289         for (i = 0;i < d->maxreferenceentities;i++)
1290                 d->referenceentity[i] = defaultstate;
1291 }
1292
1293 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
1294 {
1295         int i, j, found;
1296         entity_database4_commit_t *commit;
1297         if (framenum == -1)
1298         {
1299                 // reset reference, but leave commits alone
1300                 d->referenceframenum = -1;
1301                 for (i = 0;i < d->maxreferenceentities;i++)
1302                         d->referenceentity[i] = defaultstate;
1303                 // if this is the server, remove commits
1304                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1305                                 commit->numentities = 0;
1306                 found = true;
1307         }
1308         else if (d->referenceframenum == framenum)
1309                 found = true;
1310         else
1311         {
1312                 found = false;
1313                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1314                 {
1315                         if (commit->numentities && commit->framenum <= framenum)
1316                         {
1317                                 if (commit->framenum == framenum)
1318                                 {
1319                                         found = true;
1320                                         d->referenceframenum = framenum;
1321                                         if (developer_networkentities.integer >= 3)
1322                                         {
1323                                                 for (j = 0;j < commit->numentities;j++)
1324                                                 {
1325                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
1326                                                         if (commit->entity[j].active != s->active)
1327                                                         {
1328                                                                 if (commit->entity[j].active)
1329                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1330                                                                 else
1331                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1332                                                         }
1333                                                         *s = commit->entity[j];
1334                                                 }
1335                                         }
1336                                         else
1337                                                 for (j = 0;j < commit->numentities;j++)
1338                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
1339                                 }
1340                                 commit->numentities = 0;
1341                         }
1342                 }
1343         }
1344         if (developer_networkentities.integer >= 1)
1345         {
1346                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
1347                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1348                         if (d->commit[i].numentities)
1349                                 Con_Printf(" %i", d->commit[i].framenum);
1350                 Con_Print("\n");
1351         }
1352         return found;
1353 }
1354
1355 void EntityFrame4_CL_ReadFrame(void)
1356 {
1357         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
1358         entity_state_t *s;
1359         entityframe4_database_t *d;
1360         if (!cl.entitydatabase4)
1361                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cls.levelmempool);
1362         d = cl.entitydatabase4;
1363         // read the number of the frame this refers to
1364         referenceframenum = MSG_ReadLong();
1365         // read the number of this frame
1366         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1367                 cl.latestframenums[i] = cl.latestframenums[i+1];
1368         cl.latestframenums[LATESTFRAMENUMS-1] = framenum = MSG_ReadLong();
1369         // read the start number
1370         enumber = (unsigned short) MSG_ReadShort();
1371         if (developer_networkentities.integer >= 1)
1372         {
1373                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
1374                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1375                         if (d->commit[i].numentities)
1376                                 Con_Printf(" %i", d->commit[i].framenum);
1377                 Con_Print("\n");
1378         }
1379         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
1380         {
1381                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
1382                 skip = true;
1383         }
1384         d->currentcommit = NULL;
1385         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1386         {
1387                 if (!d->commit[i].numentities)
1388                 {
1389                         d->currentcommit = d->commit + i;
1390                         d->currentcommit->framenum = framenum;
1391                         d->currentcommit->numentities = 0;
1392                 }
1393         }
1394         if (d->currentcommit == NULL)
1395         {
1396                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
1397                 skip = true;
1398         }
1399         done = false;
1400         while (!done && !msg_badread)
1401         {
1402                 // read the number of the modified entity
1403                 // (gaps will be copied unmodified)
1404                 n = (unsigned short)MSG_ReadShort();
1405                 if (n == 0x8000)
1406                 {
1407                         // no more entities in this update, but we still need to copy the
1408                         // rest of the reference entities (final gap)
1409                         done = true;
1410                         // read end of range number, then process normally
1411                         n = (unsigned short)MSG_ReadShort();
1412                 }
1413                 // high bit means it's a remove message
1414                 cnumber = n & 0x7FFF;
1415                 // if this is a live entity we may need to expand the array
1416                 if (cl.num_entities <= cnumber && !(n & 0x8000))
1417                 {
1418                         cl.num_entities = cnumber + 1;
1419                         if (cnumber >= cl.max_entities)
1420                                 CL_ExpandEntities(cnumber);
1421                 }
1422                 // add one (the changed one) if not done
1423                 stopnumber = cnumber + !done;
1424                 // process entities in range from the last one to the changed one
1425                 for (;enumber < stopnumber;enumber++)
1426                 {
1427                         if (skip || enumber >= cl.num_entities)
1428                         {
1429                                 if (enumber == cnumber && (n & 0x8000) == 0)
1430                                 {
1431                                         entity_state_t tempstate;
1432                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
1433                                 }
1434                                 continue;
1435                         }
1436                         // slide the current into the previous slot
1437                         cl.entities[enumber].state_previous = cl.entities[enumber].state_current;
1438                         // copy a new current from reference database
1439                         cl.entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
1440                         s = &cl.entities[enumber].state_current;
1441                         // if this is the one to modify, read more data...
1442                         if (enumber == cnumber)
1443                         {
1444                                 if (n & 0x8000)
1445                                 {
1446                                         // simply removed
1447                                         if (developer_networkentities.integer >= 2)
1448                                                 Con_Printf("entity %i: remove\n", enumber);
1449                                         *s = defaultstate;
1450                                 }
1451                                 else
1452                                 {
1453                                         // read the changes
1454                                         if (developer_networkentities.integer >= 2)
1455                                                 Con_Printf("entity %i: update\n", enumber);
1456                                         s->active = true;
1457                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
1458                                 }
1459                         }
1460                         else if (developer_networkentities.integer >= 4)
1461                                 Con_Printf("entity %i: copy\n", enumber);
1462                         // set the cl.entities_active flag
1463                         cl.entities_active[enumber] = s->active;
1464                         // set the update time
1465                         s->time = cl.mtime[0];
1466                         // fix the number (it gets wiped occasionally by copying from defaultstate)
1467                         s->number = enumber;
1468                         // check if we need to update the lerp stuff
1469                         if (s->active)
1470                                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
1471                         // add this to the commit entry whether it is modified or not
1472                         if (d->currentcommit)
1473                                 EntityFrame4_AddCommitEntity(d, &cl.entities[enumber].state_current);
1474                         // print extra messages if desired
1475                         if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
1476                         {
1477                                 if (cl.entities[enumber].state_current.active)
1478                                         Con_Printf("entity #%i has become active\n", enumber);
1479                                 else if (cl.entities[enumber].state_previous.active)
1480                                         Con_Printf("entity #%i has become inactive\n", enumber);
1481                         }
1482                 }
1483         }
1484         d->currentcommit = NULL;
1485         if (skip)
1486                 EntityFrame4_ResetDatabase(d);
1487 }
1488
1489 void EntityFrame4_WriteFrame(sizebuf_t *msg, entityframe4_database_t *d, int numstates, const entity_state_t *states)
1490 {
1491         const entity_state_t *e, *s;
1492         entity_state_t inactiveentitystate;
1493         int i, n, startnumber;
1494         sizebuf_t buf;
1495         unsigned char data[128];
1496         prvm_eval_t *val;
1497
1498         // if there isn't enough space to accomplish anything, skip it
1499         if (msg->cursize + 24 > msg->maxsize)
1500                 return;
1501
1502         // prepare the buffer
1503         memset(&buf, 0, sizeof(buf));
1504         buf.data = data;
1505         buf.maxsize = sizeof(data);
1506
1507         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1508                 if (!d->commit[i].numentities)
1509                         break;
1510         // if commit buffer full, just don't bother writing an update this frame
1511         if (i == MAX_ENTITY_HISTORY)
1512                 return;
1513         d->currentcommit = d->commit + i;
1514
1515         // this state's number gets played around with later
1516         inactiveentitystate = defaultstate;
1517
1518         d->currentcommit->numentities = 0;
1519         d->currentcommit->framenum = ++d->latestframenumber;
1520         MSG_WriteByte(msg, svc_entities);
1521         MSG_WriteLong(msg, d->referenceframenum);
1522         MSG_WriteLong(msg, d->currentcommit->framenum);
1523         if (developer_networkentities.integer >= 1)
1524         {
1525                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
1526                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1527                         if (d->commit[i].numentities)
1528                                 Con_Printf(" %i", d->commit[i].framenum);
1529                 Con_Print(")\n");
1530         }
1531         if (d->currententitynumber >= prog->max_edicts)
1532                 startnumber = 1;
1533         else
1534                 startnumber = bound(1, d->currententitynumber, prog->max_edicts - 1);
1535         MSG_WriteShort(msg, startnumber);
1536         // reset currententitynumber so if the loop does not break it we will
1537         // start at beginning next frame (if it does break, it will set it)
1538         d->currententitynumber = 1;
1539         for (i = 0, n = startnumber;n < prog->max_edicts;n++)
1540         {
1541                 val = PRVM_EDICTFIELDVALUE((&prog->edicts[n]), prog->fieldoffsets.SendEntity);
1542                 if(val && val->function)
1543                         continue;
1544                 // find the old state to delta from
1545                 e = EntityFrame4_GetReferenceEntity(d, n);
1546                 // prepare the buffer
1547                 SZ_Clear(&buf);
1548                 // entity exists, build an update (if empty there is no change)
1549                 // find the state in the list
1550                 for (;i < numstates && states[i].number < n;i++);
1551                 // make the message
1552                 s = states + i;
1553                 if (s->number == n)
1554                 {
1555                         // build the update
1556                         EntityState_WriteUpdate(s, &buf, e);
1557                 }
1558                 else
1559                 {
1560                         inactiveentitystate.number = n;
1561                         s = &inactiveentitystate;
1562                         if (e->active)
1563                         {
1564                                 // entity used to exist but doesn't anymore, send remove
1565                                 MSG_WriteShort(&buf, n | 0x8000);
1566                         }
1567                 }
1568                 // if the commit is full, we're done this frame
1569                 if (msg->cursize + buf.cursize > msg->maxsize - 4)
1570                 {
1571                         // next frame we will continue where we left off
1572                         break;
1573                 }
1574                 // add the entity to the commit
1575                 EntityFrame4_AddCommitEntity(d, s);
1576                 // if the message is empty, skip out now
1577                 if (buf.cursize)
1578                 {
1579                         // write the message to the packet
1580                         SZ_Write(msg, buf.data, buf.cursize);
1581                 }
1582         }
1583         d->currententitynumber = n;
1584
1585         // remove world message (invalid, and thus a good terminator)
1586         MSG_WriteShort(msg, 0x8000);
1587         // write the number of the end entity
1588         MSG_WriteShort(msg, d->currententitynumber);
1589         // just to be sure
1590         d->currentcommit = NULL;
1591 }
1592
1593
1594
1595
1596 entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
1597 {
1598         int i;
1599         entityframe5_database_t *d;
1600         d = (entityframe5_database_t *)Mem_Alloc(pool, sizeof(*d));
1601         d->latestframenum = 0;
1602         for (i = 0;i < d->maxedicts;i++)
1603                 d->states[i] = defaultstate;
1604         return d;
1605 }
1606
1607 void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
1608 {
1609         // all the [maxedicts] memory is allocated at once, so there's only one
1610         // thing to free
1611         if (d->maxedicts)
1612                 Mem_Free(d->deltabits);
1613         Mem_Free(d);
1614 }
1615
1616 void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
1617 {
1618         if (d->maxedicts < newmax)
1619         {
1620                 unsigned char *data;
1621                 int oldmaxedicts = d->maxedicts;
1622                 int *olddeltabits = d->deltabits;
1623                 unsigned char *oldpriorities = d->priorities;
1624                 int *oldupdateframenum = d->updateframenum;
1625                 entity_state_t *oldstates = d->states;
1626                 unsigned char *oldvisiblebits = d->visiblebits;
1627                 d->maxedicts = newmax;
1628                 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));
1629                 d->deltabits = (int *)data;data += d->maxedicts * sizeof(int);
1630                 d->priorities = (unsigned char *)data;data += d->maxedicts * sizeof(unsigned char);
1631                 d->updateframenum = (int *)data;data += d->maxedicts * sizeof(int);
1632                 d->states = (entity_state_t *)data;data += d->maxedicts * sizeof(entity_state_t);
1633                 d->visiblebits = (unsigned char *)data;data += (d->maxedicts+7)/8 * sizeof(unsigned char);
1634                 if (oldmaxedicts)
1635                 {
1636                         memcpy(d->deltabits, olddeltabits, oldmaxedicts * sizeof(int));
1637                         memcpy(d->priorities, oldpriorities, oldmaxedicts * sizeof(unsigned char));
1638                         memcpy(d->updateframenum, oldupdateframenum, oldmaxedicts * sizeof(int));
1639                         memcpy(d->states, oldstates, oldmaxedicts * sizeof(entity_state_t));
1640                         memcpy(d->visiblebits, oldvisiblebits, (oldmaxedicts+7)/8 * sizeof(unsigned char));
1641                         // the previous buffers were a single allocation, so just one free
1642                         Mem_Free(olddeltabits);
1643                 }
1644         }
1645 }
1646
1647 int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
1648 {
1649         int limit, priority;
1650         entity_state_t *s;
1651         // if it is the player, update urgently
1652         if (stateindex == d->viewentnum)
1653                 return E5_PROTOCOL_PRIORITYLEVELS - 1;
1654         // priority increases each frame no matter what happens
1655         priority = d->priorities[stateindex] + 1;
1656         // players get an extra priority boost
1657         if (stateindex <= svs.maxclients)
1658                 priority++;
1659         // remove dead entities very quickly because they are just 2 bytes
1660         if (!d->states[stateindex].active)
1661         {
1662                 priority++;
1663                 return bound(1, priority, E5_PROTOCOL_PRIORITYLEVELS - 1);
1664         }
1665         // certain changes are more noticable than others
1666         if (d->deltabits[stateindex] & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
1667                 priority++;
1668         // find the root entity this one is attached to, and judge relevance by it
1669         for (limit = 0;limit < 256;limit++)
1670         {
1671                 s = d->states + stateindex;
1672                 if (s->flags & RENDER_VIEWMODEL)
1673                         stateindex = d->viewentnum;
1674                 else if (s->tagentity)
1675                         stateindex = s->tagentity;
1676                 else
1677                         break;
1678                 if (d->maxedicts < stateindex)
1679                         EntityFrame5_ExpandEdicts(d, (stateindex+256)&~255);
1680         }
1681         if (limit >= 256)
1682                 Con_DPrintf("Protocol: Runaway loop recursing tagentity links on entity %i\n", stateindex);
1683         // now that we have the parent entity we can make some decisions based on
1684         // distance from the player
1685         if (VectorDistance(d->states[d->viewentnum].netcenter, s->netcenter) < 1024.0f)
1686                 priority++;
1687         return bound(1, priority, E5_PROTOCOL_PRIORITYLEVELS - 1);
1688 }
1689
1690 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
1691 {
1692         unsigned int bits = 0;
1693
1694         prvm_eval_t *val;
1695         val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
1696         if(val && val->function)
1697                 return;
1698
1699         if (!s->active)
1700                 MSG_WriteShort(msg, number | 0x8000);
1701         else
1702         {
1703                 bits = changedbits;
1704                 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))
1705                         bits |= E5_ORIGIN32;
1706                 if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
1707                         bits |= E5_ANGLES16;
1708                 if ((bits & E5_MODEL) && s->modelindex >= 256)
1709                         bits |= E5_MODEL16;
1710                 if ((bits & E5_FRAME) && s->frame >= 256)
1711                         bits |= E5_FRAME16;
1712                 if (bits & E5_EFFECTS)
1713                 {
1714                         if (s->effects >= 65536)
1715                                 bits |= E5_EFFECTS32;
1716                         else if (s->effects >= 256)
1717                                 bits |= E5_EFFECTS16;
1718                 }
1719                 if (bits >= 256)
1720                         bits |= E5_EXTEND1;
1721                 if (bits >= 65536)
1722                         bits |= E5_EXTEND2;
1723                 if (bits >= 16777216)
1724                         bits |= E5_EXTEND3;
1725                 MSG_WriteShort(msg, number);
1726                 MSG_WriteByte(msg, bits & 0xFF);
1727                 if (bits & E5_EXTEND1)
1728                         MSG_WriteByte(msg, (bits >> 8) & 0xFF);
1729                 if (bits & E5_EXTEND2)
1730                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
1731                 if (bits & E5_EXTEND3)
1732                         MSG_WriteByte(msg, (bits >> 24) & 0xFF);
1733                 if (bits & E5_FLAGS)
1734                         MSG_WriteByte(msg, s->flags);
1735                 if (bits & E5_ORIGIN)
1736                 {
1737                         if (bits & E5_ORIGIN32)
1738                         {
1739                                 MSG_WriteCoord32f(msg, s->origin[0]);
1740                                 MSG_WriteCoord32f(msg, s->origin[1]);
1741                                 MSG_WriteCoord32f(msg, s->origin[2]);
1742                         }
1743                         else
1744                         {
1745                                 MSG_WriteCoord13i(msg, s->origin[0]);
1746                                 MSG_WriteCoord13i(msg, s->origin[1]);
1747                                 MSG_WriteCoord13i(msg, s->origin[2]);
1748                         }
1749                 }
1750                 if (bits & E5_ANGLES)
1751                 {
1752                         if (bits & E5_ANGLES16)
1753                         {
1754                                 MSG_WriteAngle16i(msg, s->angles[0]);
1755                                 MSG_WriteAngle16i(msg, s->angles[1]);
1756                                 MSG_WriteAngle16i(msg, s->angles[2]);
1757                         }
1758                         else
1759                         {
1760                                 MSG_WriteAngle8i(msg, s->angles[0]);
1761                                 MSG_WriteAngle8i(msg, s->angles[1]);
1762                                 MSG_WriteAngle8i(msg, s->angles[2]);
1763                         }
1764                 }
1765                 if (bits & E5_MODEL)
1766                 {
1767                         if (bits & E5_MODEL16)
1768                                 MSG_WriteShort(msg, s->modelindex);
1769                         else
1770                                 MSG_WriteByte(msg, s->modelindex);
1771                 }
1772                 if (bits & E5_FRAME)
1773                 {
1774                         if (bits & E5_FRAME16)
1775                                 MSG_WriteShort(msg, s->frame);
1776                         else
1777                                 MSG_WriteByte(msg, s->frame);
1778                 }
1779                 if (bits & E5_SKIN)
1780                         MSG_WriteByte(msg, s->skin);
1781                 if (bits & E5_EFFECTS)
1782                 {
1783                         if (bits & E5_EFFECTS32)
1784                                 MSG_WriteLong(msg, s->effects);
1785                         else if (bits & E5_EFFECTS16)
1786                                 MSG_WriteShort(msg, s->effects);
1787                         else
1788                                 MSG_WriteByte(msg, s->effects);
1789                 }
1790                 if (bits & E5_ALPHA)
1791                         MSG_WriteByte(msg, s->alpha);
1792                 if (bits & E5_SCALE)
1793                         MSG_WriteByte(msg, s->scale);
1794                 if (bits & E5_COLORMAP)
1795                         MSG_WriteByte(msg, s->colormap);
1796                 if (bits & E5_ATTACHMENT)
1797                 {
1798                         MSG_WriteShort(msg, s->tagentity);
1799                         MSG_WriteByte(msg, s->tagindex);
1800                 }
1801                 if (bits & E5_LIGHT)
1802                 {
1803                         MSG_WriteShort(msg, s->light[0]);
1804                         MSG_WriteShort(msg, s->light[1]);
1805                         MSG_WriteShort(msg, s->light[2]);
1806                         MSG_WriteShort(msg, s->light[3]);
1807                         MSG_WriteByte(msg, s->lightstyle);
1808                         MSG_WriteByte(msg, s->lightpflags);
1809                 }
1810                 if (bits & E5_GLOW)
1811                 {
1812                         MSG_WriteByte(msg, s->glowsize);
1813                         MSG_WriteByte(msg, s->glowcolor);
1814                 }
1815                 if (bits & E5_COLORMOD)
1816                 {
1817                         MSG_WriteByte(msg, s->colormod[0]);
1818                         MSG_WriteByte(msg, s->colormod[1]);
1819                         MSG_WriteByte(msg, s->colormod[2]);
1820                 }
1821         }
1822 }
1823
1824 void EntityState5_ReadUpdate(entity_state_t *s)
1825 {
1826         int bits;
1827         bits = MSG_ReadByte();
1828         if (bits & E5_EXTEND1)
1829         {
1830                 bits |= MSG_ReadByte() << 8;
1831                 if (bits & E5_EXTEND2)
1832                 {
1833                         bits |= MSG_ReadByte() << 16;
1834                         if (bits & E5_EXTEND3)
1835                                 bits |= MSG_ReadByte() << 24;
1836                 }
1837         }
1838         if (bits & E5_FULLUPDATE)
1839         {
1840                 *s = defaultstate;
1841                 s->active = true;
1842         }
1843         if (bits & E5_FLAGS)
1844                 s->flags = MSG_ReadByte();
1845         if (bits & E5_ORIGIN)
1846         {
1847                 if (bits & E5_ORIGIN32)
1848                 {
1849                         s->origin[0] = MSG_ReadCoord32f();
1850                         s->origin[1] = MSG_ReadCoord32f();
1851                         s->origin[2] = MSG_ReadCoord32f();
1852                 }
1853                 else
1854                 {
1855                         s->origin[0] = MSG_ReadCoord13i();
1856                         s->origin[1] = MSG_ReadCoord13i();
1857                         s->origin[2] = MSG_ReadCoord13i();
1858                 }
1859         }
1860         if (bits & E5_ANGLES)
1861         {
1862                 if (bits & E5_ANGLES16)
1863                 {
1864                         s->angles[0] = MSG_ReadAngle16i();
1865                         s->angles[1] = MSG_ReadAngle16i();
1866                         s->angles[2] = MSG_ReadAngle16i();
1867                 }
1868                 else
1869                 {
1870                         s->angles[0] = MSG_ReadAngle8i();
1871                         s->angles[1] = MSG_ReadAngle8i();
1872                         s->angles[2] = MSG_ReadAngle8i();
1873                 }
1874         }
1875         if (bits & E5_MODEL)
1876         {
1877                 if (bits & E5_MODEL16)
1878                         s->modelindex = (unsigned short) MSG_ReadShort();
1879                 else
1880                         s->modelindex = MSG_ReadByte();
1881         }
1882         if (bits & E5_FRAME)
1883         {
1884                 if (bits & E5_FRAME16)
1885                         s->frame = (unsigned short) MSG_ReadShort();
1886                 else
1887                         s->frame = MSG_ReadByte();
1888         }
1889         if (bits & E5_SKIN)
1890                 s->skin = MSG_ReadByte();
1891         if (bits & E5_EFFECTS)
1892         {
1893                 if (bits & E5_EFFECTS32)
1894                         s->effects = (unsigned int) MSG_ReadLong();
1895                 else if (bits & E5_EFFECTS16)
1896                         s->effects = (unsigned short) MSG_ReadShort();
1897                 else
1898                         s->effects = MSG_ReadByte();
1899         }
1900         if (bits & E5_ALPHA)
1901                 s->alpha = MSG_ReadByte();
1902         if (bits & E5_SCALE)
1903                 s->scale = MSG_ReadByte();
1904         if (bits & E5_COLORMAP)
1905                 s->colormap = MSG_ReadByte();
1906         if (bits & E5_ATTACHMENT)
1907         {
1908                 s->tagentity = (unsigned short) MSG_ReadShort();
1909                 s->tagindex = MSG_ReadByte();
1910         }
1911         if (bits & E5_LIGHT)
1912         {
1913                 s->light[0] = (unsigned short) MSG_ReadShort();
1914                 s->light[1] = (unsigned short) MSG_ReadShort();
1915                 s->light[2] = (unsigned short) MSG_ReadShort();
1916                 s->light[3] = (unsigned short) MSG_ReadShort();
1917                 s->lightstyle = MSG_ReadByte();
1918                 s->lightpflags = MSG_ReadByte();
1919         }
1920         if (bits & E5_GLOW)
1921         {
1922                 s->glowsize = MSG_ReadByte();
1923                 s->glowcolor = MSG_ReadByte();
1924         }
1925         if (bits & E5_COLORMOD)
1926         {
1927                 s->colormod[0] = MSG_ReadByte();
1928                 s->colormod[1] = MSG_ReadByte();
1929                 s->colormod[2] = MSG_ReadByte();
1930         }
1931
1932
1933         if (developer_networkentities.integer >= 2)
1934         {
1935                 Con_Printf("ReadFields e%i", s->number);
1936
1937                 if (bits & E5_ORIGIN)
1938                         Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
1939                 if (bits & E5_ANGLES)
1940                         Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
1941                 if (bits & E5_MODEL)
1942                         Con_Printf(" E5_MODEL %i", s->modelindex);
1943                 if (bits & E5_FRAME)
1944                         Con_Printf(" E5_FRAME %i", s->frame);
1945                 if (bits & E5_SKIN)
1946                         Con_Printf(" E5_SKIN %i", s->skin);
1947                 if (bits & E5_EFFECTS)
1948                         Con_Printf(" E5_EFFECTS %i", s->effects);
1949                 if (bits & E5_FLAGS)
1950                 {
1951                         Con_Printf(" E5_FLAGS %i (", s->flags);
1952                         if (s->flags & RENDER_STEP)
1953                                 Con_Print(" STEP");
1954                         if (s->flags & RENDER_GLOWTRAIL)
1955                                 Con_Print(" GLOWTRAIL");
1956                         if (s->flags & RENDER_VIEWMODEL)
1957                                 Con_Print(" VIEWMODEL");
1958                         if (s->flags & RENDER_EXTERIORMODEL)
1959                                 Con_Print(" EXTERIORMODEL");
1960                         if (s->flags & RENDER_LOWPRECISION)
1961                                 Con_Print(" LOWPRECISION");
1962                         if (s->flags & RENDER_COLORMAPPED)
1963                                 Con_Print(" COLORMAPPED");
1964                         if (s->flags & RENDER_SHADOW)
1965                                 Con_Print(" SHADOW");
1966                         if (s->flags & RENDER_LIGHT)
1967                                 Con_Print(" LIGHT");
1968                         Con_Print(")");
1969                 }
1970                 if (bits & E5_ALPHA)
1971                         Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
1972                 if (bits & E5_SCALE)
1973                         Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
1974                 if (bits & E5_COLORMAP)
1975                         Con_Printf(" E5_COLORMAP %i", s->colormap);
1976                 if (bits & E5_ATTACHMENT)
1977                         Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
1978                 if (bits & E5_LIGHT)
1979                         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);
1980                 if (bits & E5_GLOW)
1981                         Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
1982                 if (bits & E5_COLORMOD)
1983                         Con_Printf(" E5_COLORMOD %f:%f:%f", s->colormod[0] / 32.0f, s->colormod[1] / 32.0f, s->colormod[2] / 32.0f);
1984                 Con_Print("\n");
1985         }
1986 }
1987
1988 int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
1989 {
1990         unsigned int bits = 0;
1991         if (n->active)
1992         {
1993                 if (!o->active)
1994                         bits |= E5_FULLUPDATE;
1995                 if (!VectorCompare(o->origin, n->origin))
1996                         bits |= E5_ORIGIN;
1997                 if (!VectorCompare(o->angles, n->angles))
1998                         bits |= E5_ANGLES;
1999                 if (o->modelindex != n->modelindex)
2000                         bits |= E5_MODEL;
2001                 if (o->frame != n->frame)
2002                         bits |= E5_FRAME;
2003                 if (o->skin != n->skin)
2004                         bits |= E5_SKIN;
2005                 if (o->effects != n->effects)
2006                         bits |= E5_EFFECTS;
2007                 if (o->flags != n->flags)
2008                         bits |= E5_FLAGS;
2009                 if (o->alpha != n->alpha)
2010                         bits |= E5_ALPHA;
2011                 if (o->scale != n->scale)
2012                         bits |= E5_SCALE;
2013                 if (o->colormap != n->colormap)
2014                         bits |= E5_COLORMAP;
2015                 if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
2016                         bits |= E5_ATTACHMENT;
2017                 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)
2018                         bits |= E5_LIGHT;
2019                 if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
2020                         bits |= E5_GLOW;
2021                 if (o->colormod[0] != n->colormod[0] || o->colormod[1] != n->colormod[1] || o->colormod[2] != n->colormod[2])
2022                         bits |= E5_COLORMOD;
2023         }
2024         else
2025                 if (o->active)
2026                         bits |= E5_FULLUPDATE;
2027         return bits;
2028 }
2029
2030 void EntityFrame5_CL_ReadFrame(void)
2031 {
2032         int i, n, enumber;
2033         entity_t *ent;
2034         entity_state_t *s;
2035         // read the number of this frame to echo back in next input packet
2036         for (i = 0;i < LATESTFRAMENUMS-1;i++)
2037                 cl.latestframenums[i] = cl.latestframenums[i+1];
2038         cl.latestframenums[LATESTFRAMENUMS-1] = MSG_ReadLong();
2039         if (developer_networkentities.integer)
2040                 Con_Printf("recv: svc_entities %i\n", cl.latestframenums[LATESTFRAMENUMS-1]);
2041         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)
2042                 cls.servermovesequence = MSG_ReadLong();
2043         // read entity numbers until we find a 0x8000
2044         // (which would be remove world entity, but is actually a terminator)
2045         while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
2046         {
2047                 // get the entity number
2048                 enumber = n & 0x7FFF;
2049                 // we may need to expand the array
2050                 if (cl.num_entities <= enumber)
2051                 {
2052                         cl.num_entities = enumber + 1;
2053                         if (enumber >= cl.max_entities)
2054                                 CL_ExpandEntities(enumber);
2055                 }
2056                 // look up the entity
2057                 ent = cl.entities + enumber;
2058                 // slide the current into the previous slot
2059                 ent->state_previous = ent->state_current;
2060                 // read the update
2061                 s = &ent->state_current;
2062                 if (n & 0x8000)
2063                 {
2064                         // remove entity
2065                         *s = defaultstate;
2066                 }
2067                 else
2068                 {
2069                         // update entity
2070                         EntityState5_ReadUpdate(s);
2071                 }
2072                 // set the cl.entities_active flag
2073                 cl.entities_active[enumber] = s->active;
2074                 // set the update time
2075                 s->time = cl.mtime[0];
2076                 // fix the number (it gets wiped occasionally by copying from defaultstate)
2077                 s->number = enumber;
2078                 // check if we need to update the lerp stuff
2079                 if (s->active)
2080                         CL_MoveLerpEntityStates(&cl.entities[enumber]);
2081                 // print extra messages if desired
2082                 if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
2083                 {
2084                         if (cl.entities[enumber].state_current.active)
2085                                 Con_Printf("entity #%i has become active\n", enumber);
2086                         else if (cl.entities[enumber].state_previous.active)
2087                                 Con_Printf("entity #%i has become inactive\n", enumber);
2088                 }
2089         }
2090 }
2091
2092 void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum)
2093 {
2094         int i, j, k, l, bits;
2095         entityframe5_changestate_t *s, *s2;
2096         entityframe5_packetlog_t *p, *p2;
2097         unsigned char statsdeltabits[(MAX_CL_STATS+7)/8];
2098         // scan for packets that were lost
2099         for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
2100         {
2101                 if (p->packetnumber && p->packetnumber <= framenum)
2102                 {
2103                         // packet was lost - merge deltabits into the main array so they
2104                         // will be re-sent, but only if there is no newer update of that
2105                         // bit in the logs (as those will arrive before this update)
2106                         for (j = 0, s = p->states;j < p->numstates;j++, s++)
2107                         {
2108                                 // check for any newer updates to this entity and mask off any
2109                                 // overlapping bits (we don't need to send something again if
2110                                 // it has already been sent more recently)
2111                                 bits = s->bits & ~d->deltabits[s->number];
2112                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
2113                                 {
2114                                         if (p2->packetnumber > framenum)
2115                                         {
2116                                                 for (l = 0, s2 = p2->states;l < p2->numstates;l++, s2++)
2117                                                 {
2118                                                         if (s2->number == s->number)
2119                                                         {
2120                                                                 bits &= ~s2->bits;
2121                                                                 break;
2122                                                         }
2123                                                 }
2124                                         }
2125                                 }
2126                                 // if the bits haven't all been cleared, there were some bits
2127                                 // lost with this packet, so set them again now
2128                                 if (bits)
2129                                 {
2130                                         d->deltabits[s->number] |= bits;
2131                                         // if it was a very important update, set priority higher
2132                                         if (bits & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL || E5_COLORMAP))
2133                                                 d->priorities[s->number] = max(d->priorities[s->number], 4);
2134                                         else
2135                                                 d->priorities[s->number] = max(d->priorities[s->number], 1);
2136                                 }
2137                         }
2138                         // mark lost stats
2139                         for (j = 0;j < MAX_CL_STATS;j++)
2140                         {
2141                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2142                                         statsdeltabits[l] = p->statsdeltabits[l] & ~d->statsdeltabits[l];
2143                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS;k++, p2++)
2144                                         if (p2->packetnumber > framenum)
2145                                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2146                                                         statsdeltabits[l] = p->statsdeltabits[l] & ~p2->statsdeltabits[l];
2147                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
2148                                         d->statsdeltabits[l] |= statsdeltabits[l];
2149                         }
2150                         // delete this packet log as it is now obsolete
2151                         p->packetnumber = 0;
2152                 }
2153         }
2154 }
2155
2156 void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
2157 {
2158         int i;
2159         // scan for packets made obsolete by this ack and delete them
2160         for (i = 0;i < ENTITYFRAME5_MAXPACKETLOGS;i++)
2161                 if (d->packetlog[i].packetnumber <= framenum)
2162                         d->packetlog[i].packetnumber = 0;
2163 }
2164
2165 void EntityFrame5_WriteFrame(sizebuf_t *msg, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int *stats, int movesequence)
2166 {
2167         const entity_state_t *n;
2168         int i, num, l, framenum, packetlognumber, priority;
2169         sizebuf_t buf;
2170         unsigned char data[128];
2171         entityframe5_packetlog_t *packetlog;
2172
2173         if (prog->max_edicts > d->maxedicts)
2174                 EntityFrame5_ExpandEdicts(d, prog->max_edicts);
2175
2176         framenum = d->latestframenum + 1;
2177         d->viewentnum = viewentnum;
2178
2179         // if packet log is full, mark all frames as lost, this will cause
2180         // it to send the lost data again
2181         for (packetlognumber = 0;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++)
2182                 if (d->packetlog[packetlognumber].packetnumber == 0)
2183                         break;
2184         if (packetlognumber == ENTITYFRAME5_MAXPACKETLOGS)
2185         {
2186                 Con_DPrintf("EntityFrame5_WriteFrame: packetlog overflow for a client, resetting\n");
2187                 EntityFrame5_LostFrame(d, framenum);
2188                 packetlognumber = 0;
2189         }
2190
2191         // prepare the buffer
2192         memset(&buf, 0, sizeof(buf));
2193         buf.data = data;
2194         buf.maxsize = sizeof(data);
2195
2196         // detect changes in stats
2197         for (i = 0;i < MAX_CL_STATS;i++)
2198         {
2199                 if (d->stats[i] != stats[i])
2200                 {
2201                         d->statsdeltabits[i>>3] |= (1<<(i&7));
2202                         d->stats[i] = stats[i];
2203                 }
2204         }
2205
2206         // detect changes in states
2207         num = 0;
2208         for (i = 0, n = states;i < numstates;i++, n++)
2209         {
2210                 // mark gaps in entity numbering as removed entities
2211                 for (;num < n->number;num++)
2212                 {
2213                         // if the entity used to exist, clear it
2214                         if (CHECKPVSBIT(d->visiblebits, num))
2215                         {
2216                                 CLEARPVSBIT(d->visiblebits, num);
2217                                 d->deltabits[num] = E5_FULLUPDATE;
2218                                 d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2219                                 d->states[num] = defaultstate;
2220                                 d->states[num].number = num;
2221                         }
2222                 }
2223                 // update the entity state data
2224                 if (!CHECKPVSBIT(d->visiblebits, num))
2225                 {
2226                         // entity just spawned in, don't let it completely hog priority
2227                         // because of being ancient on the first frame
2228                         d->updateframenum[num] = framenum;
2229                         // initial priority is a bit high to make projectiles send on the
2230                         // first frame, among other things
2231                         d->priorities[num] = max(d->priorities[num], 4);
2232                 }
2233                 SETPVSBIT(d->visiblebits, num);
2234                 d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
2235                 d->priorities[num] = max(d->priorities[num], 1);
2236                 d->states[num] = *n;
2237                 d->states[num].number = num;
2238                 // advance to next entity so the next iteration doesn't immediately remove it
2239                 num++;
2240         }
2241         // all remaining entities are dead
2242         for (;num < d->maxedicts;num++)
2243         {
2244                 if (CHECKPVSBIT(d->visiblebits, num))
2245                 {
2246                         CLEARPVSBIT(d->visiblebits, num);
2247                         d->deltabits[num] = E5_FULLUPDATE;
2248                         d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
2249                         d->states[num] = defaultstate;
2250                         d->states[num].number = num;
2251                 }
2252         }
2253
2254         // if there isn't at least enough room for an empty svc_entities,
2255         // don't bother trying...
2256         if (buf.cursize + 11 > buf.maxsize)
2257                 return;
2258
2259         // build lists of entities by priority level
2260         memset(entityframe5_prioritychaincounts, 0, sizeof(entityframe5_prioritychaincounts));
2261         l = 0;
2262         for (num = 0;num < d->maxedicts;num++)
2263         {
2264                 if (d->priorities[num])
2265                 {
2266                         if (d->priorities[num] < (E5_PROTOCOL_PRIORITYLEVELS - 1))
2267                                 d->priorities[num] = EntityState5_Priority(d, num);
2268                         l = num;
2269                         priority = d->priorities[num];
2270                         if (entityframe5_prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
2271                                 entityframe5_prioritychains[priority][entityframe5_prioritychaincounts[priority]++] = num;
2272                 }
2273         }
2274
2275         // add packetlog entry
2276         packetlog = d->packetlog + packetlognumber;
2277         packetlog->packetnumber = framenum;
2278         packetlog->numstates = 0;
2279         // write stat updates
2280         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)
2281         {
2282                 for (i = 0;i < MAX_CL_STATS && msg->cursize + 6 + 11 <= msg->maxsize;i++)
2283                 {
2284                         if (d->statsdeltabits[i>>3] & (1<<(i&7)))
2285                         {
2286                                 d->statsdeltabits[i>>3] &= ~(1<<(i&7));
2287                                 packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
2288                                 if (d->stats[i] >= 0 && d->stats[i] < 256)
2289                                 {
2290                                         MSG_WriteByte(msg, svc_updatestatubyte);
2291                                         MSG_WriteByte(msg, i);
2292                                         MSG_WriteByte(msg, d->stats[i]);
2293                                 }
2294                                 else
2295                                 {
2296                                         MSG_WriteByte(msg, svc_updatestat);
2297                                         MSG_WriteByte(msg, i);
2298                                         MSG_WriteLong(msg, d->stats[i]);
2299                                 }
2300                         }
2301                 }
2302         }
2303         // write state updates
2304         if (developer_networkentities.integer)
2305                 Con_Printf("send: svc_entities %i\n", framenum);
2306         d->latestframenum = framenum;
2307         MSG_WriteByte(msg, svc_entities);
2308         MSG_WriteLong(msg, framenum);
2309         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)
2310                 MSG_WriteLong(msg, movesequence);
2311         for (priority = E5_PROTOCOL_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
2312         {
2313                 for (i = 0;i < entityframe5_prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
2314                 {
2315                         num = entityframe5_prioritychains[priority][i];
2316                         n = d->states + num;
2317                         if (d->deltabits[num] & E5_FULLUPDATE)
2318                                 d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
2319                         buf.cursize = 0;
2320                         EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
2321                         // if the entity won't fit, try the next one
2322                         if (msg->cursize + buf.cursize + 2 > msg->maxsize)
2323                                 continue;
2324                         // write entity to the packet
2325                         SZ_Write(msg, buf.data, buf.cursize);
2326                         // mark age on entity for prioritization
2327                         d->updateframenum[num] = framenum;
2328                         // log entity so deltabits can be restored later if lost
2329                         packetlog->states[packetlog->numstates].number = num;
2330                         packetlog->states[packetlog->numstates].bits = d->deltabits[num];
2331                         packetlog->numstates++;
2332                         // clear deltabits and priority so it won't be sent again
2333                         d->deltabits[num] = 0;
2334                         d->priorities[num] = 0;
2335                 }
2336         }
2337         MSG_WriteShort(msg, 0x8000);
2338 }
2339
2340
2341 static int QW_TranslateEffects(int qweffects, int number)
2342 {
2343         int effects = 0;
2344         if (qweffects & QW_EF_BRIGHTFIELD)
2345                 effects |= EF_BRIGHTFIELD;
2346         if (qweffects & QW_EF_MUZZLEFLASH)
2347                 effects |= EF_MUZZLEFLASH;
2348         if (qweffects & QW_EF_FLAG1)
2349         {
2350                 // mimic FTEQW's interpretation of EF_FLAG1 as EF_NODRAW on non-player entities
2351                 if (number > cl.maxclients)
2352                         effects |= EF_NODRAW;
2353                 else
2354                         effects |= EF_FLAG1QW;
2355         }
2356         if (qweffects & QW_EF_FLAG2)
2357         {
2358                 // mimic FTEQW's interpretation of EF_FLAG2 as EF_ADDITIVE on non-player entities
2359                 if (number > cl.maxclients)
2360                         effects |= EF_ADDITIVE;
2361                 else
2362                         effects |= EF_FLAG2QW;
2363         }
2364         if (qweffects & QW_EF_RED)
2365         {
2366                 if (qweffects & QW_EF_BLUE)
2367                         effects |= EF_RED | EF_BLUE;
2368                 else
2369                         effects |= EF_RED;
2370         }
2371         else if (qweffects & QW_EF_BLUE)
2372                 effects |= EF_BLUE;
2373         else if (qweffects & QW_EF_BRIGHTLIGHT)
2374                 effects |= EF_BRIGHTLIGHT;
2375         else if (qweffects & QW_EF_DIMLIGHT)
2376                 effects |= EF_DIMLIGHT;
2377         return effects;
2378 }
2379
2380 void EntityStateQW_ReadPlayerUpdate(void)
2381 {
2382         int slot = MSG_ReadByte();
2383         int enumber = slot + 1;
2384         int weaponframe;
2385         int msec;
2386         int playerflags;
2387         int bits;
2388         entity_state_t *s;
2389         // look up the entity
2390         entity_t *ent = cl.entities + enumber;
2391         vec3_t viewangles;
2392         vec3_t velocity;
2393
2394         // slide the current state into the previous
2395         ent->state_previous = ent->state_current;
2396
2397         // read the update
2398         s = &ent->state_current;
2399         *s = defaultstate;
2400         s->active = true;
2401         s->colormap = enumber;
2402         playerflags = MSG_ReadShort();
2403         MSG_ReadVector(s->origin, cls.protocol);
2404         s->frame = MSG_ReadByte();
2405
2406         VectorClear(viewangles);
2407         VectorClear(velocity);
2408
2409         if (playerflags & QW_PF_MSEC)
2410         {
2411                 // time difference between last update this player sent to the server,
2412                 // and last input we sent to the server (this packet is in response to
2413                 // our input, so msec is how long ago the last update of this player
2414                 // entity occurred, compared to our input being received)
2415                 msec = MSG_ReadByte();
2416         }
2417         else
2418                 msec = 0;
2419         if (playerflags & QW_PF_COMMAND)
2420         {
2421                 bits = MSG_ReadByte();
2422                 if (bits & QW_CM_ANGLE1)
2423                         viewangles[0] = MSG_ReadAngle16i(); // cmd->angles[0]
2424                 if (bits & QW_CM_ANGLE2)
2425                         viewangles[1] = MSG_ReadAngle16i(); // cmd->angles[1]
2426                 if (bits & QW_CM_ANGLE3)
2427                         viewangles[2] = MSG_ReadAngle16i(); // cmd->angles[2]
2428                 if (bits & QW_CM_FORWARD)
2429                         MSG_ReadShort(); // cmd->forwardmove
2430                 if (bits & QW_CM_SIDE)
2431                         MSG_ReadShort(); // cmd->sidemove
2432                 if (bits & QW_CM_UP)
2433                         MSG_ReadShort(); // cmd->upmove
2434                 if (bits & QW_CM_BUTTONS)
2435                         MSG_ReadByte(); // cmd->buttons
2436                 if (bits & QW_CM_IMPULSE)
2437                         MSG_ReadByte(); // cmd->impulse
2438                 MSG_ReadByte(); // cmd->msec
2439         }
2440         if (playerflags & QW_PF_VELOCITY1)
2441                 velocity[0] = MSG_ReadShort();
2442         if (playerflags & QW_PF_VELOCITY2)
2443                 velocity[1] = MSG_ReadShort();
2444         if (playerflags & QW_PF_VELOCITY3)
2445                 velocity[2] = MSG_ReadShort();
2446         if (playerflags & QW_PF_MODEL)
2447                 s->modelindex = MSG_ReadByte();
2448         else
2449                 s->modelindex = cl.qw_modelindex_player;
2450         if (playerflags & QW_PF_SKINNUM)
2451                 s->skin = MSG_ReadByte();
2452         if (playerflags & QW_PF_EFFECTS)
2453                 s->effects = QW_TranslateEffects(MSG_ReadByte(), enumber);
2454         if (playerflags & QW_PF_WEAPONFRAME)
2455                 weaponframe = MSG_ReadByte();
2456         else
2457                 weaponframe = 0;
2458
2459         if (enumber == cl.playerentity)
2460         {
2461                 // if this is an update on our player, update the angles
2462                 VectorCopy(cl.viewangles, viewangles);
2463         }
2464
2465         // calculate the entity angles from the viewangles
2466         s->angles[0] = viewangles[0] * -0.0333;
2467         s->angles[1] = viewangles[1];
2468         s->angles[2] = 0;
2469         s->angles[2] = V_CalcRoll(s->angles, velocity)*4;
2470
2471         // if this is an update on our player, update interpolation state
2472         if (enumber == cl.playerentity)
2473         {
2474                 VectorCopy (cl.mpunchangle[0], cl.mpunchangle[1]);
2475                 VectorCopy (cl.mpunchvector[0], cl.mpunchvector[1]);
2476                 VectorCopy (cl.mvelocity[0], cl.mvelocity[1]);
2477                 cl.mviewzoom[1] = cl.mviewzoom[0];
2478
2479                 cl.idealpitch = 0;
2480                 cl.mpunchangle[0][0] = 0;
2481                 cl.mpunchangle[0][1] = 0;
2482                 cl.mpunchangle[0][2] = 0;
2483                 cl.mpunchvector[0][0] = 0;
2484                 cl.mpunchvector[0][1] = 0;
2485                 cl.mpunchvector[0][2] = 0;
2486                 cl.mvelocity[0][0] = 0;
2487                 cl.mvelocity[0][1] = 0;
2488                 cl.mvelocity[0][2] = 0;
2489                 cl.mviewzoom[0] = 1;
2490
2491                 VectorCopy(velocity, cl.mvelocity[0]);
2492                 cl.stats[STAT_WEAPONFRAME] = weaponframe;
2493                 if (playerflags & QW_PF_GIB)
2494                         cl.stats[STAT_VIEWHEIGHT] = 8;
2495                 else if (playerflags & QW_PF_DEAD)
2496                         cl.stats[STAT_VIEWHEIGHT] = -16;
2497                 else
2498                         cl.stats[STAT_VIEWHEIGHT] = 22;
2499         }
2500
2501         // set the cl.entities_active flag
2502         cl.entities_active[enumber] = s->active;
2503         // set the update time
2504         s->time = cl.mtime[0] - msec * 0.001; // qw has no clock
2505         // fix the number (it gets wiped occasionally by copying from defaultstate)
2506         s->number = enumber;
2507         // check if we need to update the lerp stuff
2508         if (s->active)
2509                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
2510 }
2511
2512 static void EntityStateQW_ReadEntityUpdate(entity_state_t *s, int bits)
2513 {
2514         int qweffects = 0;
2515         s->active = true;
2516         s->number = bits & 511;
2517         bits &= ~511;
2518         if (bits & QW_U_MOREBITS)
2519                 bits |= MSG_ReadByte();
2520
2521         // store the QW_U_SOLID bit here?
2522
2523         if (bits & QW_U_MODEL)
2524                 s->modelindex = MSG_ReadByte();
2525         if (bits & QW_U_FRAME)
2526                 s->frame = MSG_ReadByte();
2527         if (bits & QW_U_COLORMAP)
2528                 s->colormap = MSG_ReadByte();
2529         if (bits & QW_U_SKIN)
2530                 s->skin = MSG_ReadByte();
2531         if (bits & QW_U_EFFECTS)
2532                 s->effects = QW_TranslateEffects(qweffects = MSG_ReadByte(), s->number);
2533         if (bits & QW_U_ORIGIN1)
2534                 s->origin[0] = MSG_ReadCoord13i();
2535         if (bits & QW_U_ANGLE1)
2536                 s->angles[0] = MSG_ReadAngle8i();
2537         if (bits & QW_U_ORIGIN2)
2538                 s->origin[1] = MSG_ReadCoord13i();
2539         if (bits & QW_U_ANGLE2)
2540                 s->angles[1] = MSG_ReadAngle8i();
2541         if (bits & QW_U_ORIGIN3)
2542                 s->origin[2] = MSG_ReadCoord13i();
2543         if (bits & QW_U_ANGLE3)
2544                 s->angles[2] = MSG_ReadAngle8i();
2545
2546         if (developer_networkentities.integer >= 2)
2547         {
2548                 Con_Printf("ReadFields e%i", s->number);
2549                 if (bits & QW_U_MODEL)
2550                         Con_Printf(" U_MODEL %i", s->modelindex);
2551                 if (bits & QW_U_FRAME)
2552                         Con_Printf(" U_FRAME %i", s->frame);
2553                 if (bits & QW_U_COLORMAP)
2554                         Con_Printf(" U_COLORMAP %i", s->colormap);
2555                 if (bits & QW_U_SKIN)
2556                         Con_Printf(" U_SKIN %i", s->skin);
2557                 if (bits & QW_U_EFFECTS)
2558                         Con_Printf(" U_EFFECTS %i", qweffects);
2559                 if (bits & QW_U_ORIGIN1)
2560                         Con_Printf(" U_ORIGIN1 %f", s->origin[0]);
2561                 if (bits & QW_U_ANGLE1)
2562                         Con_Printf(" U_ANGLE1 %f", s->angles[0]);
2563                 if (bits & QW_U_ORIGIN2)
2564                         Con_Printf(" U_ORIGIN2 %f", s->origin[1]);
2565                 if (bits & QW_U_ANGLE2)
2566                         Con_Printf(" U_ANGLE2 %f", s->angles[1]);
2567                 if (bits & QW_U_ORIGIN3)
2568                         Con_Printf(" U_ORIGIN3 %f", s->origin[2]);
2569                 if (bits & QW_U_ANGLE3)
2570                         Con_Printf(" U_ANGLE3 %f", s->angles[2]);
2571                 if (bits & QW_U_SOLID)
2572                         Con_Printf(" U_SOLID");
2573                 Con_Print("\n");
2574         }
2575 }
2576
2577 entityframeqw_database_t *EntityFrameQW_AllocDatabase(mempool_t *pool)
2578 {
2579         entityframeqw_database_t *d;
2580         d = (entityframeqw_database_t *)Mem_Alloc(pool, sizeof(*d));
2581         return d;
2582 }
2583
2584 void EntityFrameQW_FreeDatabase(entityframeqw_database_t *d)
2585 {
2586         Mem_Free(d);
2587 }
2588
2589 void EntityFrameQW_CL_ReadFrame(qboolean delta)
2590 {
2591         qboolean invalid = false;
2592         int number, oldsnapindex, newsnapindex, oldindex, newindex, oldnum, newnum;
2593         entity_t *ent;
2594         entityframeqw_database_t *d;
2595         entityframeqw_snapshot_t *oldsnap, *newsnap;
2596
2597         if (!cl.entitydatabaseqw)
2598                 cl.entitydatabaseqw = EntityFrameQW_AllocDatabase(cls.levelmempool);
2599         d = cl.entitydatabaseqw;
2600
2601         // there is no cls.netcon in demos, so this reading code can't access
2602         // cls.netcon-> at all...  so cls.qw_incoming_sequence and
2603         // cls.qw_outgoing_sequence are updated every time the corresponding
2604         // cls.netcon->qw. variables are updated
2605         // read the number of this frame to echo back in next input packet
2606         cl.qw_validsequence = cls.qw_incoming_sequence;
2607         newsnapindex = cl.qw_validsequence & QW_UPDATE_MASK;
2608         newsnap = d->snapshot + newsnapindex;
2609         memset(newsnap, 0, sizeof(*newsnap));
2610         oldsnapindex = -1;
2611         oldsnap = NULL;
2612         if (delta)
2613         {
2614                 number = MSG_ReadByte();
2615                 oldsnapindex = cl.qw_deltasequence[newsnapindex];
2616                 if ((number & QW_UPDATE_MASK) != (oldsnapindex & QW_UPDATE_MASK))
2617                         Con_DPrintf("WARNING: from mismatch\n");
2618                 if (oldsnapindex != -1)
2619                 {
2620                         if (cls.qw_outgoing_sequence - oldsnapindex >= QW_UPDATE_BACKUP-1)
2621                         {
2622                                 Con_DPrintf("delta update too old\n");
2623                                 newsnap->invalid = invalid = true; // too old
2624                                 delta = false;
2625                         }
2626                         oldsnap = d->snapshot + (oldsnapindex & QW_UPDATE_MASK);
2627                 }
2628                 else
2629                         delta = false;
2630         }
2631
2632         // if we can't decode this frame properly, report that to the server
2633         if (invalid)
2634                 cl.qw_validsequence = 0;
2635
2636         // read entity numbers until we find a 0x0000
2637         // (which would be an empty update on world entity, but is actually a terminator)
2638         newsnap->num_entities = 0;
2639         oldindex = 0;
2640         for (;;)
2641         {
2642                 int word = (unsigned short)MSG_ReadShort();
2643                 if (msg_badread)
2644                         return; // just return, the main parser will print an error
2645                 newnum = word == 0 ? 512 : (word & 511);
2646                 oldnum = delta ? (oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number) : 9999;
2647
2648                 // copy unmodified oldsnap entities
2649                 while (newnum > oldnum) // delta only
2650                 {
2651                         if (developer_networkentities.integer >= 2)
2652                                 Con_Printf("copy %i\n", oldnum);
2653                         // copy one of the old entities
2654                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2655                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2656                         newsnap->entities[newsnap->num_entities] = oldsnap->entities[oldindex++];
2657                         newsnap->num_entities++;
2658                         oldnum = oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number;
2659                 }
2660
2661                 if (word == 0)
2662                         break;
2663
2664                 if (developer_networkentities.integer >= 2)
2665                 {
2666                         if (word & QW_U_REMOVE)
2667                                 Con_Printf("remove %i\n", newnum);
2668                         else if (newnum == oldnum)
2669                                 Con_Printf("delta %i\n", newnum);
2670                         else
2671                                 Con_Printf("baseline %i\n", newnum);
2672                 }
2673
2674                 if (word & QW_U_REMOVE)
2675                 {
2676                         if (newnum != oldnum && !delta && !invalid)
2677                         {
2678                                 cl.qw_validsequence = 0;
2679                                 Con_Printf("WARNING: U_REMOVE %i on full update\n", newnum);
2680                         }
2681                 }
2682                 else
2683                 {
2684                         if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
2685                                 Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
2686                         newsnap->entities[newsnap->num_entities] = (newnum == oldnum) ? oldsnap->entities[oldindex] : cl.entities[newnum].state_baseline;
2687                         EntityStateQW_ReadEntityUpdate(newsnap->entities + newsnap->num_entities, word);
2688                         newsnap->num_entities++;
2689                 }
2690
2691                 if (newnum == oldnum)
2692                         oldindex++;
2693         }
2694
2695         // expand cl.num_entities to include every entity we've seen this game
2696         newnum = newsnap->num_entities ? newsnap->entities[newsnap->num_entities - 1].number : 1;
2697         if (cl.num_entities <= newnum)
2698         {
2699                 cl.num_entities = newnum + 1;
2700                 if (cl.max_entities < newnum + 1)
2701                         CL_ExpandEntities(newnum);
2702         }
2703
2704         // now update the non-player entities from the snapshot states
2705         number = cl.maxclients + 1;
2706         for (newindex = 0;;newindex++)
2707         {
2708                 newnum = newindex >= newsnap->num_entities ? cl.num_entities : newsnap->entities[newindex].number;
2709                 // kill any missing entities
2710                 for (;number < newnum;number++)
2711                 {
2712                         if (cl.entities_active[number])
2713                         {
2714                                 cl.entities_active[number] = false;
2715                                 cl.entities[number].state_current.active = false;
2716                         }
2717                 }
2718                 if (number >= cl.num_entities)
2719                         break;
2720                 // update the entity
2721                 ent = &cl.entities[number];
2722                 ent->state_previous = ent->state_current;
2723                 ent->state_current = newsnap->entities[newindex];
2724                 ent->state_current.time = cl.mtime[0];
2725                 CL_MoveLerpEntityStates(ent);
2726                 // the entity lives again...
2727                 cl.entities_active[number] = true;
2728                 number++;
2729         }
2730 }