protocol.c

   1
   2 #include "quakedef.h"
   3
   4 entity_state_t defaultstate =
   5 {
   6         0,//double time; // time this state was built
   7         {0,0,0},//vec3_t origin;
   8         {0,0,0},//vec3_t angles;
   9         0,//int number; // entity number this state is for
  10         0,//unsigned short active; // true if a valid state
  11         0,//unsigned short modelindex;
  12         0,//unsigned short frame;
  13         0,//unsigned short effects;
  14         0,//unsigned short tagentity;
  15         0,//unsigned short specialvisibilityradius;
  16         0,//unsigned short viewmodelforclient;
  17         0,//unsigned short exteriormodelforclient;
  18         0,//unsigned short nodrawtoclient;
  19         0,//unsigned short drawonlytoclient;
  20         {0,0,0,0},//short light[4];
  21         0,//qbyte lightstyle;
  22         0,//qbyte lightpflags;
  23         0,//qbyte colormap;
  24         0,//qbyte skin;
  25         255,//qbyte alpha;
  26         16,//qbyte scale;
  27         0,//qbyte glowsize;
  28         254,//qbyte glowcolor;
  29         0,//qbyte flags;
  30         0,//qbyte tagindex;
  31         {0,0,0,0,0,0}//qbyte unused[6];
  32 };
  33
  34 void ClearStateToDefault(entity_state_t *s)
  35 {
  36         *s = defaultstate;
  37         /*
  38         memset(s, 0, sizeof(*s));
  39         s->alpha = 255;
  40         s->scale = 16;
  41         s->glowcolor = 254;
  42         */
  43 }
  44
  45 void EntityState_Write(entity_state_t *ent, sizebuf_t *msg, entity_state_t *delta)
  46 {
  47         int bits;
  48         vec3_t org, deltaorg;
  49         if (ent->active)
  50         {
  51                 // if not active last frame, delta from defaults
  52                 if (!delta->active)
  53                         delta = &defaultstate;
  54                 bits = 0;
  55                 VectorCopy(ent->origin, org);
  56                 VectorCopy(delta->origin, deltaorg);
  57                 if (ent->flags & RENDER_LOWPRECISION)
  58                 {
  59                         if (org[0] > 0)
  60                                 org[0] = (int) (org[0] + 0.5f);
  61                         else
  62                                 org[0] = (int) (org[0] - 0.5f);
  63                         if (org[1] > 0)
  64                                 org[1] = (int) (org[1] + 0.5f);
  65                         else
  66                                 org[1] = (int) (org[1] - 0.5f);
  67                         if (org[2] > 0)
  68                                 org[2] = (int) (org[2] + 0.5f);
  69                         else
  70                                 org[2] = (int) (org[2] - 0.5f);
  71                 }
  72                 if (delta->flags & RENDER_LOWPRECISION)
  73                 {
  74                         if (deltaorg[0] > 0)
  75                                 deltaorg[0] = (int) (deltaorg[0] + 0.5f);
  76                         else
  77                                 deltaorg[0] = (int) (deltaorg[0] - 0.5f);
  78                         if (deltaorg[1] > 0)
  79                                 deltaorg[1] = (int) (deltaorg[1] + 0.5f);
  80                         else
  81                                 deltaorg[1] = (int) (deltaorg[1] - 0.5f);
  82                         if (deltaorg[2] > 0)
  83                                 deltaorg[2] = (int) (deltaorg[2] + 0.5f);
  84                         else
  85                                 deltaorg[2] = (int) (deltaorg[2] - 0.5f);
  86                 }
  87                 if (fabs(org[0] - deltaorg[0]) > 0.01f)
  88                         bits |= E_ORIGIN1;
  89                 if (fabs(org[1] - deltaorg[1]) > 0.01f)
  90                         bits |= E_ORIGIN2;
  91                 if (fabs(org[2] - deltaorg[2]) > 0.01f)
  92                         bits |= E_ORIGIN3;
  93                 if ((qbyte) (ent->angles[0] * (256.0f / 360.0f)) != (qbyte) (delta->angles[0] * (256.0f / 360.0f)))
  94                         bits |= E_ANGLE1;
  95                 if ((qbyte) (ent->angles[1] * (256.0f / 360.0f)) != (qbyte) (delta->angles[1] * (256.0f / 360.0f)))
  96                         bits |= E_ANGLE2;
  97                 if ((qbyte) (ent->angles[2] * (256.0f / 360.0f)) != (qbyte) (delta->angles[2] * (256.0f / 360.0f)))
  98                         bits |= E_ANGLE3;
  99                 if ((ent->modelindex ^ delta->modelindex) & 0x00FF)
 100                         bits |= E_MODEL1;
 101                 if ((ent->modelindex ^ delta->modelindex) & 0xFF00)
 102                         bits |= E_MODEL2;
 103                 if ((ent->frame ^ delta->frame) & 0x00FF)
 104                         bits |= E_FRAME1;
 105                 if ((ent->frame ^ delta->frame) & 0xFF00)
 106                         bits |= E_FRAME2;
 107                 if ((ent->effects ^ delta->effects) & 0x00FF)
 108                         bits |= E_EFFECTS1;
 109                 if ((ent->effects ^ delta->effects) & 0xFF00)
 110                         bits |= E_EFFECTS2;
 111                 if (ent->colormap != delta->colormap)
 112                         bits |= E_COLORMAP;
 113                 if (ent->skin != delta->skin)
 114                         bits |= E_SKIN;
 115                 if (ent->alpha != delta->alpha)
 116                         bits |= E_ALPHA;
 117                 if (ent->scale != delta->scale)
 118                         bits |= E_SCALE;
 119                 if (ent->glowsize != delta->glowsize)
 120                         bits |= E_GLOWSIZE;
 121                 if (ent->glowcolor != delta->glowcolor)
 122                         bits |= E_GLOWCOLOR;
 123                 if (ent->flags != delta->flags)
 124                         bits |= E_FLAGS;
 125                 if (ent->tagindex != delta->tagindex || ent->tagentity != delta->tagentity)
 126                         bits |= E_TAGATTACHMENT;
 127                 if (ent->light[0] != delta->light[0] || ent->light[1] != delta->light[1] || ent->light[2] != delta->light[2] || ent->light[3] != delta->light[3])
 128                         bits |= E_LIGHT;
 129                 if (ent->lightstyle != delta->lightstyle)
 130                         bits |= E_LIGHTSTYLE;
 131                 if (ent->lightpflags != delta->lightpflags)
 132                         bits |= E_LIGHTPFLAGS;
 133
 134                 if (bits) // don't send anything if it hasn't changed
 135                 {
 136                         if (bits & 0xFF000000)
 137                                 bits |= E_EXTEND3;
 138                         if (bits & 0x00FF0000)
 139                                 bits |= E_EXTEND2;
 140                         if (bits & 0x0000FF00)
 141                                 bits |= E_EXTEND1;
 142
 143                         MSG_WriteShort(msg, ent->number);
 144                         MSG_WriteByte(msg, bits & 0xFF);
 145                         if (bits & E_EXTEND1)
 146                         {
 147                                 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
 148                                 if (bits & E_EXTEND2)
 149                                 {
 150                                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
 151                                         if (bits & E_EXTEND3)
 152                                                 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
 153                                 }
 154                         }
 155                         // LordHavoc: have to write flags first, as they can modify protocol
 156                         if (bits & E_FLAGS)
 157                                 MSG_WriteByte(msg, ent->flags);
 158                         if (ent->flags & RENDER_LOWPRECISION)
 159                         {
 160                                 if (bits & E_ORIGIN1)
 161                                         MSG_WriteShort(msg, org[0]);
 162                                 if (bits & E_ORIGIN2)
 163                                         MSG_WriteShort(msg, org[1]);
 164                                 if (bits & E_ORIGIN3)
 165                                         MSG_WriteShort(msg, org[2]);
 166                                 if (bits & E_ANGLE1)
 167                                         MSG_WriteAngle(msg, ent->angles[0]);
 168                                 if (bits & E_ANGLE2)
 169                                         MSG_WriteAngle(msg, ent->angles[1]);
 170                                 if (bits & E_ANGLE3)
 171                                         MSG_WriteAngle(msg, ent->angles[2]);
 172                         }
 173                         else
 174                         {
 175                                 if (bits & E_ORIGIN1)
 176                                         MSG_WriteFloat(msg, org[0]);
 177                                 if (bits & E_ORIGIN2)
 178                                         MSG_WriteFloat(msg, org[1]);
 179                                 if (bits & E_ORIGIN3)
 180                                         MSG_WriteFloat(msg, org[2]);
 181                                 if (bits & E_ANGLE1)
 182                                         MSG_WritePreciseAngle(msg, ent->angles[0]);
 183                                 if (bits & E_ANGLE2)
 184                                         MSG_WritePreciseAngle(msg, ent->angles[1]);
 185                                 if (bits & E_ANGLE3)
 186                                         MSG_WritePreciseAngle(msg, ent->angles[2]);
 187                         }
 188                         if (bits & E_MODEL1)
 189                                 MSG_WriteByte(msg, ent->modelindex & 0xFF);
 190                         if (bits & E_MODEL2)
 191                                 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
 192                         if (bits & E_FRAME1)
 193                                 MSG_WriteByte(msg, ent->frame & 0xFF);
 194                         if (bits & E_FRAME2)
 195                                 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
 196                         if (bits & E_EFFECTS1)
 197                                 MSG_WriteByte(msg, ent->effects & 0xFF);
 198                         if (bits & E_EFFECTS2)
 199                                 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
 200                         if (bits & E_COLORMAP)
 201                                 MSG_WriteByte(msg, ent->colormap);
 202                         if (bits & E_SKIN)
 203                                 MSG_WriteByte(msg, ent->skin);
 204                         if (bits & E_ALPHA)
 205                                 MSG_WriteByte(msg, ent->alpha);
 206                         if (bits & E_SCALE)
 207                                 MSG_WriteByte(msg, ent->scale);
 208                         if (bits & E_GLOWSIZE)
 209                                 MSG_WriteByte(msg, ent->glowsize);
 210                         if (bits & E_GLOWCOLOR)
 211                                 MSG_WriteByte(msg, ent->glowcolor);
 212                         if (bits & E_TAGATTACHMENT)
 213                         {
 214                                 MSG_WriteShort(msg, ent->tagentity);
 215                                 MSG_WriteByte(msg, ent->tagindex);
 216                         }
 217                         if (bits & E_LIGHT)
 218                         {
 219                                 MSG_WriteShort(msg, ent->light[0]);
 220                                 MSG_WriteShort(msg, ent->light[1]);
 221                                 MSG_WriteShort(msg, ent->light[2]);
 222                                 MSG_WriteShort(msg, ent->light[3]);
 223                         }
 224                         if (bits & E_LIGHTSTYLE)
 225                                 MSG_WriteByte(msg, ent->lightstyle);
 226                         if (bits & E_LIGHTPFLAGS)
 227                                 MSG_WriteByte(msg, ent->lightpflags);
 228                 }
 229         }
 230         else if (delta->active)
 231                 MSG_WriteShort(msg, ent->number | 0x8000);
 232 }
 233
 234 void EntityState_ReadUpdate(entity_state_t *e, int number)
 235 {
 236         int bits;
 237         cl_entities_active[number] = true;
 238         e->active = true;
 239         e->time = cl.mtime[0];
 240         e->number = number;
 241
 242         bits = MSG_ReadByte();
 243         if (bits & E_EXTEND1)
 244         {
 245                 bits |= MSG_ReadByte() << 8;
 246                 if (bits & E_EXTEND2)
 247                 {
 248                         bits |= MSG_ReadByte() << 16;
 249                         if (bits & E_EXTEND3)
 250                                 bits |= MSG_ReadByte() << 24;
 251                 }
 252         }
 253
 254         if (cl.protocol == PROTOCOL_DARKPLACES2)
 255         {
 256                 if (bits & E_ORIGIN1)
 257                         e->origin[0] = (signed short) MSG_ReadShort();
 258                 if (bits & E_ORIGIN2)
 259                         e->origin[1] = (signed short) MSG_ReadShort();
 260                 if (bits & E_ORIGIN3)
 261                         e->origin[2] = (signed short) MSG_ReadShort();
 262         }
 263         else
 264         {
 265                 if (bits & E_FLAGS)
 266                         e->flags = MSG_ReadByte();
 267                 if (e->flags & RENDER_LOWPRECISION || cl.protocol == PROTOCOL_DARKPLACES2)
 268                 {
 269                         if (bits & E_ORIGIN1)
 270                                 e->origin[0] = (signed short) MSG_ReadShort();
 271                         if (bits & E_ORIGIN2)
 272                                 e->origin[1] = (signed short) MSG_ReadShort();
 273                         if (bits & E_ORIGIN3)
 274                                 e->origin[2] = (signed short) MSG_ReadShort();
 275                 }
 276                 else
 277                 {
 278                         if (bits & E_ORIGIN1)
 279                                 e->origin[0] = MSG_ReadFloat();
 280                         if (bits & E_ORIGIN2)
 281                                 e->origin[1] = MSG_ReadFloat();
 282                         if (bits & E_ORIGIN3)
 283                                 e->origin[2] = MSG_ReadFloat();
 284                 }
 285         }
 286         if (cl.protocol == PROTOCOL_DARKPLACES5 && !(e->flags & RENDER_LOWPRECISION))
 287         {
 288                 if (bits & E_ANGLE1)
 289                         e->angles[0] = MSG_ReadPreciseAngle();
 290                 if (bits & E_ANGLE2)
 291                         e->angles[1] = MSG_ReadPreciseAngle();
 292                 if (bits & E_ANGLE3)
 293                         e->angles[2] = MSG_ReadPreciseAngle();
 294         }
 295         else
 296         {
 297                 if (bits & E_ANGLE1)
 298                         e->angles[0] = MSG_ReadAngle();
 299                 if (bits & E_ANGLE2)
 300                         e->angles[1] = MSG_ReadAngle();
 301                 if (bits & E_ANGLE3)
 302                         e->angles[2] = MSG_ReadAngle();
 303         }
 304         if (bits & E_MODEL1)
 305                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
 306         if (bits & E_MODEL2)
 307                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 308         if (bits & E_FRAME1)
 309                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
 310         if (bits & E_FRAME2)
 311                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 312         if (bits & E_EFFECTS1)
 313                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
 314         if (bits & E_EFFECTS2)
 315                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
 316         if (bits & E_COLORMAP)
 317                 e->colormap = MSG_ReadByte();
 318         if (bits & E_SKIN)
 319                 e->skin = MSG_ReadByte();
 320         if (bits & E_ALPHA)
 321                 e->alpha = MSG_ReadByte();
 322         if (bits & E_SCALE)
 323                 e->scale = MSG_ReadByte();
 324         if (bits & E_GLOWSIZE)
 325                 e->glowsize = MSG_ReadByte();
 326         if (bits & E_GLOWCOLOR)
 327                 e->glowcolor = MSG_ReadByte();
 328         if (cl.protocol == PROTOCOL_DARKPLACES2)
 329                 if (bits & E_FLAGS)
 330                         e->flags = MSG_ReadByte();
 331         if (bits & E_TAGATTACHMENT)
 332         {
 333                 e->tagentity = MSG_ReadShort();
 334                 e->tagindex = MSG_ReadByte();
 335         }
 336         if (bits & E_LIGHT)
 337         {
 338                 e->light[0] = MSG_ReadShort();
 339                 e->light[1] = MSG_ReadShort();
 340                 e->light[2] = MSG_ReadShort();
 341                 e->light[3] = MSG_ReadShort();
 342         }
 343         if (bits & E_LIGHTSTYLE)
 344                 e->lightstyle = MSG_ReadByte();
 345         if (bits & E_LIGHTPFLAGS)
 346                 e->lightpflags = MSG_ReadByte();
 347
 348         if (developer_networkentities.integer >= 2)
 349         {
 350                 Con_Printf("ReadUpdate e%i", number);
 351
 352                 if (bits & E_ORIGIN1)
 353                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
 354                 if (bits & E_ORIGIN2)
 355                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
 356                 if (bits & E_ORIGIN3)
 357                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
 358                 if (bits & E_ANGLE1)
 359                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
 360                 if (bits & E_ANGLE2)
 361                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
 362                 if (bits & E_ANGLE3)
 363                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
 364                 if (bits & (E_MODEL1 | E_MODEL2))
 365                         Con_Printf(" E_MODEL %i", e->modelindex);
 366
 367                 if (bits & (E_FRAME1 | E_FRAME2))
 368                         Con_Printf(" E_FRAME %i", e->frame);
 369                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
 370                         Con_Printf(" E_EFFECTS %i", e->effects);
 371                 if (bits & E_ALPHA)
 372                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
 373                 if (bits & E_SCALE)
 374                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
 375                 if (bits & E_COLORMAP)
 376                         Con_Printf(" E_COLORMAP %i", e->colormap);
 377                 if (bits & E_SKIN)
 378                         Con_Printf(" E_SKIN %i", e->skin);
 379
 380                 if (bits & E_GLOWSIZE)
 381                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
 382                 if (bits & E_GLOWCOLOR)
 383                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
 384
 385                 if (bits & E_LIGHT)
 386                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
 387                 if (bits & E_LIGHTPFLAGS)
 388                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
 389
 390                 if (bits & E_TAGATTACHMENT)
 391                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
 392                 if (bits & E_LIGHTSTYLE)
 393                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
 394                 Con_Print("\n");
 395         }
 396 }
 397
 398 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
 399 void EntityFrame_ClearDatabase(entity_database_t *d)
 400 {
 401         memset(d, 0, sizeof(*d));
 402 }
 403
 404 // (server and client) removes frames older than 'frame' from database
 405 void EntityFrame_AckFrame(entity_database_t *d, int frame)
 406 {
 407         int i;
 408         if (d->ackframe < frame)
 409                 d->ackframe = frame;
 410         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
 411         // ignore outdated frame acks (out of order packets)
 412         if (i == 0)
 413                 return;
 414         d->numframes -= i;
 415         // if some queue is left, slide it down to beginning of array
 416         if (d->numframes)
 417                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
 418 }
 419
 420 // (server) clears frame, to prepare for adding entities
 421 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
 422 {
 423         f->time = 0;
 424         f->framenum = framenum;
 425         f->numentities = 0;
 426         if (eye == NULL)
 427         {
 428                 VectorClear(f->eye);
 429         }
 430         else
 431         {
 432                 VectorCopy(eye, f->eye);
 433         }
 434 }
 435
 436 // (server) adds an entity to frame
 437 void EntityFrame_AddEntity(entity_frame_t *f, entity_state_t *s)
 438 {
 439         if (f->numentities < MAX_ENTITY_DATABASE)
 440         {
 441                 f->entitydata[f->numentities] = *s;
 442                 f->entitydata[f->numentities++].active = true;
 443         }
 444 }
 445
 446 // (server and client) reads a frame from the database
 447 void EntityFrame_FetchFrame(entity_database_t *d, int framenum, entity_frame_t *f)
 448 {
 449         int i, n;
 450         EntityFrame_Clear(f, NULL, -1);
 451         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
 452         if (i < d->numframes && framenum == d->frames[i].framenum)
 453         {
 454                 f->framenum = framenum;
 455                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
 456                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
 457                 if (n > f->numentities)
 458                         n = f->numentities;
 459                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
 460                 if (f->numentities > n)
 461                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
 462                 VectorCopy(d->eye, f->eye);
 463         }
 464 }
 465
 466 // (server and client) adds a entity_frame to the database, for future reference
 467 void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f)
 468 {
 469         int n, e;
 470         entity_frameinfo_t *info;
 471
 472         VectorCopy(f->eye, d->eye);
 473
 474         // figure out how many entity slots are used already
 475         if (d->numframes)
 476         {
 477                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
 478                 if (n + f->numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
 479                 {
 480                         // ran out of room, dump database
 481                         EntityFrame_ClearDatabase(d);
 482                 }
 483         }
 484
 485         info = &d->frames[d->numframes];
 486         info->framenum = f->framenum;
 487         e = -1000;
 488         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
 489         for (n = 0;n <= d->numframes;n++)
 490         {
 491                 if (e >= d->frames[n].framenum)
 492                 {
 493                         if (e == f->framenum)
 494                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
 495                         else
 496                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
 497                         return;
 498                 }
 499                 e = d->frames[n].framenum;
 500         }
 501         // if database still has frames after that...
 502         if (d->numframes)
 503                 info->firstentity = d->frames[d->numframes - 1].endentity;
 504         else
 505                 info->firstentity = 0;
 506         info->endentity = info->firstentity + f->numentities;
 507         d->numframes++;
 508
 509         n = info->firstentity % MAX_ENTITY_DATABASE;
 510         e = MAX_ENTITY_DATABASE - n;
 511         if (e > f->numentities)
 512                 e = f->numentities;
 513         memcpy(d->entitydata + n, f->entitydata, sizeof(entity_state_t) * e);
 514         if (f->numentities > e)
 515                 memcpy(d->entitydata, f->entitydata + e, sizeof(entity_state_t) * (f->numentities - e));
 516 }
 517
 518 // (server) writes a frame to network stream
 519 static entity_frame_t deltaframe; // FIXME?
 520 void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
 521 {
 522         int i, onum, number;
 523         entity_frame_t *o = &deltaframe;
 524         entity_state_t *ent, *delta;
 525
 526         EntityFrame_AddFrame(d, f);
 527
 528         EntityFrame_FetchFrame(d, d->ackframe > 0 ? d->ackframe : -1, o);
 529         MSG_WriteByte (msg, svc_entities);
 530         MSG_WriteLong (msg, o->framenum);
 531         MSG_WriteLong (msg, f->framenum);
 532         MSG_WriteFloat (msg, f->eye[0]);
 533         MSG_WriteFloat (msg, f->eye[1]);
 534         MSG_WriteFloat (msg, f->eye[2]);
 535
 536         onum = 0;
 537         for (i = 0;i < f->numentities;i++)
 538         {
 539                 ent = f->entitydata + i;
 540                 number = ent->number;
 541                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
 542                 {
 543                         // write remove message
 544                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
 545                 }
 546                 if (onum < o->numentities && (o->entitydata[onum].number == number))
 547                 {
 548                         // delta from previous frame
 549                         delta = o->entitydata + onum;
 550                         // advance to next entity in delta frame
 551                         onum++;
 552                 }
 553                 else
 554                 {
 555                         // delta from defaults
 556                         delta = &defaultstate;
 557                 }
 558                 EntityState_Write(ent, msg, delta);
 559         }
 560         for (;onum < o->numentities;onum++)
 561         {
 562                 // write remove message
 563                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
 564         }
 565         MSG_WriteShort(msg, 0xFFFF);
 566 }
 567
 568 // (client) reads a frame from network stream
 569 static entity_frame_t framedata; // FIXME?
 570 void EntityFrame_Read(entity_database_t *d)
 571 {
 572         int number, removed;
 573         entity_frame_t *f = &framedata, *delta = &deltaframe;
 574         entity_state_t *e, *old, *oldend;
 575
 576         EntityFrame_Clear(f, NULL, -1);
 577
 578         // read the frame header info
 579         f->time = cl.mtime[0];
 580         number = MSG_ReadLong();
 581         f->framenum = MSG_ReadLong();
 582         f->eye[0] = MSG_ReadFloat();
 583         f->eye[1] = MSG_ReadFloat();
 584         f->eye[2] = MSG_ReadFloat();
 585         EntityFrame_AckFrame(d, number);
 586         EntityFrame_FetchFrame(d, number, delta);
 587         old = delta->entitydata;
 588         oldend = old + delta->numentities;
 589         // read entities until we hit the magic 0xFFFF end tag
 590         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF)
 591         {
 592                 if (msg_badread)
 593                         Host_Error("EntityFrame_Read: read error\n");
 594                 removed = number & 0x8000;
 595                 number &= 0x7FFF;
 596                 if (number >= MAX_EDICTS)
 597                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)\n", number, MAX_EDICTS);
 598
 599                 // seek to entity, while copying any skipped entities (assume unchanged)
 600                 while (old < oldend && old->number < number)
 601                 {
 602                         if (f->numentities >= MAX_ENTITY_DATABASE)
 603                                 Host_Error("EntityFrame_Read: entity list too big\n");
 604                         f->entitydata[f->numentities] = *old++;
 605                         f->entitydata[f->numentities++].time = cl.mtime[0];
 606                 }
 607                 if (removed)
 608                 {
 609                         if (old < oldend && old->number == number)
 610                                 old++;
 611                         else
 612                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
 613                 }
 614                 else
 615                 {
 616                         if (f->numentities >= MAX_ENTITY_DATABASE)
 617                                 Host_Error("EntityFrame_Read: entity list too big\n");
 618
 619                         // reserve this slot
 620                         e = f->entitydata + f->numentities++;
 621
 622                         if (old < oldend && old->number == number)
 623                         {
 624                                 // delta from old entity
 625                                 *e = *old++;
 626                         }
 627                         else
 628                         {
 629                                 // delta from defaults
 630                                 *e = defaultstate;
 631                         }
 632
 633                         EntityState_ReadUpdate(e, number);
 634                 }
 635         }
 636         while (old < oldend)
 637         {
 638                 if (f->numentities >= MAX_ENTITY_DATABASE)
 639                         Host_Error("EntityFrame_Read: entity list too big\n");
 640                 f->entitydata[f->numentities] = *old++;
 641                 f->entitydata[f->numentities++].time = cl.mtime[0];
 642         }
 643         EntityFrame_AddFrame(d, f);
 644 }
 645
 646
 647 // (client) returns the frame number of the most recent frame recieved
 648 int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d)
 649 {
 650         if (d->numframes)
 651                 return d->frames[d->numframes - 1].framenum;
 652         else
 653                 return -1;
 654 }
 655
 656
 657
 658
 659
 660
 661 entity_state_t *EntityFrame4_GetReferenceEntity(entity_database4_t *d, int number)
 662 {
 663         if (d->maxreferenceentities <= number)
 664         {
 665                 int oldmax = d->maxreferenceentities;
 666                 entity_state_t *oldentity = d->referenceentity;
 667                 d->maxreferenceentities = (number + 15) & ~7;
 668                 d->referenceentity = Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
 669                 if (oldentity)
 670                 {
 671                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
 672                         Mem_Free(oldentity);
 673                 }
 674                 // clear the newly created entities
 675                 for (;oldmax < d->maxreferenceentities;oldmax++)
 676                 {
 677                         d->referenceentity[oldmax] = defaultstate;
 678                         d->referenceentity[oldmax].number = oldmax;
 679                 }
 680         }
 681         return d->referenceentity + number;
 682 }
 683
 684 void EntityFrame4_AddCommitEntity(entity_database4_t *d, entity_state_t *s)
 685 {
 686         // resize commit's entity list if full
 687         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
 688         {
 689                 entity_state_t *oldentity = d->currentcommit->entity;
 690                 d->currentcommit->maxentities += 8;
 691                 d->currentcommit->entity = Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
 692                 if (oldentity)
 693                 {
 694                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
 695                         Mem_Free(oldentity);
 696                 }
 697         }
 698         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
 699 }
 700
 701 entity_database4_t *EntityFrame4_AllocDatabase(mempool_t *pool)
 702 {
 703         entity_database4_t *d;
 704         d = Mem_Alloc(pool, sizeof(*d));
 705         d->mempool = pool;
 706         EntityFrame4_ResetDatabase(d);
 707         d->ackframenum = -1;
 708         return d;
 709 }
 710
 711 void EntityFrame4_FreeDatabase(entity_database4_t *d)
 712 {
 713         int i;
 714         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 715                 if (d->commit[i].entity)
 716                         Mem_Free(d->commit[i].entity);
 717         if (d->referenceentity)
 718                 Mem_Free(d->referenceentity);
 719         Mem_Free(d);
 720 }
 721
 722 void EntityFrame4_ResetDatabase(entity_database4_t *d)
 723 {
 724         int i;
 725         d->referenceframenum = -1;
 726         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 727                 d->commit[i].numentities = 0;
 728         for (i = 0;i < d->maxreferenceentities;i++)
 729                 d->referenceentity[i] = defaultstate;
 730 }
 731
 732 int EntityFrame4_AckFrame(entity_database4_t *d, int framenum)
 733 {
 734         int i, j, found = false;
 735         entity_database4_commit_t *commit;
 736         if (d->referenceframenum == framenum)
 737                 return true;
 738         if (framenum == -1)
 739         {
 740                 EntityFrame4_ResetDatabase(d);
 741                 return true;
 742         }
 743         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
 744         {
 745                 if (commit->numentities && commit->framenum <= framenum)
 746                 {
 747                         if (commit->framenum == framenum)
 748                         {
 749                                 found = true;
 750                                 d->referenceframenum = framenum;
 751                                 if (developer_networkentities.integer >= 3)
 752                                 {
 753                                         for (j = 0;j < commit->numentities;j++)
 754                                         {
 755                                                 entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
 756                                                 if (commit->entity[j].active != s->active)
 757                                                 {
 758                                                         if (commit->entity[j].active)
 759                                                                 Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
 760                                                         else
 761                                                                 Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
 762                                                 }
 763                                                 *s = commit->entity[j];
 764                                         }
 765                                 }
 766                                 else
 767                                         for (j = 0;j < commit->numentities;j++)
 768                                                 *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
 769                         }
 770                         commit->numentities = 0;
 771                 }
 772         }
 773         return found;
 774 }
 775
 776 int EntityFrame4_SV_WriteFrame_Entity(entity_database4_t *d, sizebuf_t *msg, int maxbytes, entity_state_t *s)
 777 {
 778         qbyte data[128];
 779         sizebuf_t buf;
 780         entity_state_t *e;
 781         // prepare the buffer
 782         memset(&buf, 0, sizeof(buf));
 783         buf.data = data;
 784         buf.maxsize = sizeof(data);
 785         // make the message
 786         e = EntityFrame4_GetReferenceEntity(d, s->number);
 787         // send an update (may update or remove the entity)
 788         EntityState_Write(s, &buf, e);
 789         // if the message is empty, skip out now
 790         if (!buf.cursize)
 791                 return true;
 792         // if the commit is full, we're done
 793         if (msg->cursize + buf.cursize + 2 >= min(msg->maxsize, maxbytes))
 794                 return false;
 795         // add the entity to the commit
 796         EntityFrame4_AddCommitEntity(d, s);
 797         // write the message to the packet
 798         SZ_Write(msg, buf.data, buf.cursize);
 799         // carry on
 800         return true;
 801 }
 802
 803 extern void CL_MoveLerpEntityStates(entity_t *ent);
 804 void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
 805 {
 806         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
 807         // read the number of the frame this refers to
 808         referenceframenum = MSG_ReadLong();
 809         // read the number of this frame
 810         framenum = MSG_ReadLong();
 811         // read the start number
 812         enumber = MSG_ReadShort();
 813         if (developer_networkentities.integer >= 1)
 814         {
 815                 Con_Printf("recv svc_entities ref:%i num:%i (database: ref:%i commits:", referenceframenum, framenum, d->referenceframenum);
 816                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 817                         if (d->commit[i].numentities)
 818                                 Con_Printf(" %i", d->commit[i].framenum);
 819                 Con_Print("\n");
 820         }
 821         if (!EntityFrame4_AckFrame(d, referenceframenum))
 822         {
 823                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
 824                 skip = true;
 825                 d->ackframenum = -1;
 826                 EntityFrame4_ResetDatabase(d);
 827         }
 828         d->currentcommit = NULL;
 829         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 830         {
 831                 if (!d->commit[i].numentities)
 832                 {
 833                         d->currentcommit = d->commit + i;
 834                         d->currentcommit->framenum = d->ackframenum = framenum;
 835                         d->currentcommit->numentities = 0;
 836                 }
 837         }
 838         if (d->currentcommit == NULL)
 839         {
 840                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
 841                 skip = true;
 842         }
 843         done = false;
 844         while (!done && !msg_badread)
 845         {
 846                 // read the number of the modified entity
 847                 // (gaps will be copied unmodified)
 848                 n = (unsigned short)MSG_ReadShort();
 849                 if (n == 0x8000)
 850                 {
 851                         // no more entities in this update, but we still need to copy the
 852                         // rest of the reference entities (final gap)
 853                         done = true;
 854                         // read end of range number, then process normally
 855                         n = (unsigned short)MSG_ReadShort();
 856                 }
 857                 // high bit means it's a remove message
 858                 cnumber = n & 0x7FFF;
 859                 // add one (the changed one) if not done
 860                 stopnumber = cnumber + !done;
 861                 // process entities in range from the last one to the changed one
 862                 for (;enumber < stopnumber;enumber++)
 863                 {
 864                         if (skip)
 865                         {
 866                                 if (enumber == cnumber && (n & 0x8000) == 0)
 867                                 {
 868                                         entity_state_t tempstate;
 869                                         EntityState_ReadUpdate(&tempstate, enumber);
 870                                 }
 871                                 continue;
 872                         }
 873                         // slide the current into the previous slot
 874                         cl_entities[enumber].state_previous = cl_entities[enumber].state_current;
 875                         // copy a new current from reference database
 876                         cl_entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
 877                         // if this is the one to modify, read more data...
 878                         if (enumber == cnumber)
 879                         {
 880                                 if (n & 0x8000)
 881                                 {
 882                                         // simply removed
 883                                         if (developer_networkentities.integer >= 2)
 884                                                 Con_Printf("entity %i: remove\n", enumber);
 885                                         cl_entities[enumber].state_current = defaultstate;
 886                                 }
 887                                 else
 888                                 {
 889                                         // read the changes
 890                                         if (developer_networkentities.integer >= 2)
 891                                                 Con_Printf("entity %i: update\n", enumber);
 892                                         EntityState_ReadUpdate(&cl_entities[enumber].state_current, enumber);
 893                                 }
 894                         }
 895                         else if (developer_networkentities.integer >= 4)
 896                                 Con_Printf("entity %i: copy\n", enumber);
 897                         // fix the number (it gets wiped occasionally by copying from defaultstate)
 898                         cl_entities[enumber].state_current.number = enumber;
 899                         // check if we need to update the lerp stuff
 900                         if (cl_entities[enumber].state_current.active)
 901                         {
 902                                 CL_MoveLerpEntityStates(&cl_entities[enumber]);
 903                                 cl_entities_active[enumber] = true;
 904                         }
 905                         // add this to the commit entry whether it is modified or not
 906                         if (d->currentcommit)
 907                                 EntityFrame4_AddCommitEntity(d, &cl_entities[enumber].state_current);
 908                         // print extra messages if desired
 909                         if (developer_networkentities.integer >= 2 && cl_entities[enumber].state_current.active != cl_entities[enumber].state_previous.active)
 910                         {
 911                                 if (cl_entities[enumber].state_current.active)
 912                                         Con_Printf("entity #%i has become active\n", enumber);
 913                                 else if (cl_entities[enumber].state_previous.active)
 914                                         Con_Printf("entity #%i has become inactive\n", enumber);
 915                         }
 916                 }
 917         }
 918         d->currentcommit = NULL;
 919 }
 920
 921