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protocol.c

#include "quakedef.h"

#define ENTITYSIZEPROFILING_START(msg, num) \
      int entityprofiling_startsize = msg->cursize

#define ENTITYSIZEPROFILING_END(msg, num) \
      if(developer_networkentities.integer >= 2) \
      { \
            prvm_edict_t *ed = prog->edicts + num; \
            Con_Printf("sent entity update of size %d for a %s\n", (msg->cursize - entityprofiling_startsize), PRVM_serveredictstring(ed, classname) ? PRVM_GetString(PRVM_serveredictstring(ed, classname)) : "(no classname)"); \
      }

// this is 88 bytes (must match entity_state_t in protocol.h)
entity_state_t defaultstate =
{
      // ! means this is not sent to client
      0,//double time; // ! time this state was built (used on client for interpolation)
      {0,0,0},//float netcenter[3]; // ! for network prioritization, this is the center of the bounding box (which may differ from the origin)
      {0,0,0},//float origin[3];
      {0,0,0},//float angles[3];
      0,//int effects;
      0,//unsigned int customizeentityforclient; // !
      0,//unsigned short number; // entity number this state is for
      0,//unsigned short modelindex;
      0,//unsigned short frame;
      0,//unsigned short tagentity;
      0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
      0,//unsigned short viewmodelforclient; // !
      0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
      0,//unsigned short nodrawtoclient; // !
      0,//unsigned short drawonlytoclient; // !
      0,//unsigned short traileffectnum;
      {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
      ACTIVE_NOT,//unsigned char active; // true if a valid state
      0,//unsigned char lightstyle;
      0,//unsigned char lightpflags;
      0,//unsigned char colormap;
      0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
      255,//unsigned char alpha;
      16,//unsigned char scale;
      0,//unsigned char glowsize;
      254,//unsigned char glowcolor;
      0,//unsigned char flags;
      0,//unsigned char internaleffects; // INTEF_FLAG1QW and so on
      0,//unsigned char tagindex;
      {32, 32, 32},//unsigned char colormod[3];
      {32, 32, 32},//unsigned char glowmod[3];
};

// LordHavoc: I own protocol ranges 96, 97, 3500-3599

00052 struct protocolversioninfo_s
{
      int number;
      protocolversion_t version;
      const char *name;
}
protocolversioninfo[] =
{
      { 3504, PROTOCOL_DARKPLACES7 , "DP7"},
      { 3503, PROTOCOL_DARKPLACES6 , "DP6"},
      { 3502, PROTOCOL_DARKPLACES5 , "DP5"},
      { 3501, PROTOCOL_DARKPLACES4 , "DP4"},
      { 3500, PROTOCOL_DARKPLACES3 , "DP3"},
      {   97, PROTOCOL_DARKPLACES2 , "DP2"},
      {   96, PROTOCOL_DARKPLACES1 , "DP1"},
      {   15, PROTOCOL_QUAKEDP     , "QUAKEDP"},
      {   15, PROTOCOL_QUAKE       , "QUAKE"},
      {   28, PROTOCOL_QUAKEWORLD  , "QW"},
      {  250, PROTOCOL_NEHAHRAMOVIE, "NEHAHRAMOVIE"},
      {10000, PROTOCOL_NEHAHRABJP  , "NEHAHRABJP"},
      {10001, PROTOCOL_NEHAHRABJP2 , "NEHAHRABJP2"},
      {10002, PROTOCOL_NEHAHRABJP3 , "NEHAHRABJP3"},
      {    0, PROTOCOL_UNKNOWN     , NULL}
};

protocolversion_t Protocol_EnumForName(const char *s)
{
      int i;
      for (i = 0;protocolversioninfo[i].name;i++)
            if (!strcasecmp(s, protocolversioninfo[i].name))
                  return protocolversioninfo[i].version;
      return PROTOCOL_UNKNOWN;
}

const char *Protocol_NameForEnum(protocolversion_t p)
{
      int i;
      for (i = 0;protocolversioninfo[i].name;i++)
            if (protocolversioninfo[i].version == p)
                  return protocolversioninfo[i].name;
      return "UNKNOWN";
}

protocolversion_t Protocol_EnumForNumber(int n)
{
      int i;
      for (i = 0;protocolversioninfo[i].name;i++)
            if (protocolversioninfo[i].number == n)
                  return protocolversioninfo[i].version;
      return PROTOCOL_UNKNOWN;
}

int Protocol_NumberForEnum(protocolversion_t p)
{
      int i;
      for (i = 0;protocolversioninfo[i].name;i++)
            if (protocolversioninfo[i].version == p)
                  return protocolversioninfo[i].number;
      return 0;
}

void Protocol_Names(char *buffer, size_t buffersize)
{
      int i;
      if (buffersize < 1)
            return;
      buffer[0] = 0;
      for (i = 0;protocolversioninfo[i].name;i++)
      {
            if (i > 1)
                  strlcat(buffer, " ", buffersize);
            strlcat(buffer, protocolversioninfo[i].name, buffersize);
      }
}

void EntityFrameQuake_ReadEntity(int bits)
{
      int num;
      entity_t *ent;
      entity_state_t s;

      if (bits & U_MOREBITS)
            bits |= (MSG_ReadByte()<<8);
      if ((bits & U_EXTEND1) && cls.protocol != PROTOCOL_NEHAHRAMOVIE)
      {
            bits |= MSG_ReadByte() << 16;
            if (bits & U_EXTEND2)
                  bits |= MSG_ReadByte() << 24;
      }

      if (bits & U_LONGENTITY)
            num = (unsigned short) MSG_ReadShort ();
      else
            num = MSG_ReadByte ();

      if (num >= MAX_EDICTS)
            Host_Error("EntityFrameQuake_ReadEntity: entity number (%i) >= MAX_EDICTS (%i)", num, MAX_EDICTS);
      if (num < 1)
            Host_Error("EntityFrameQuake_ReadEntity: invalid entity number (%i)", num);

      if (cl.num_entities <= num)
      {
            cl.num_entities = num + 1;
            if (num >= cl.max_entities)
                  CL_ExpandEntities(num);
      }

      ent = cl.entities + num;

      // note: this inherits the 'active' state of the baseline chosen
      // (state_baseline is always active, state_current may not be active if
      // the entity was missing in the last frame)
      if (bits & U_DELTA)
            s = ent->state_current;
      else
      {
            s = ent->state_baseline;
            s.active = ACTIVE_NETWORK;
      }

      cl.isquakeentity[num] = true;
      if (cl.lastquakeentity < num)
            cl.lastquakeentity = num;
      s.number = num;
      s.time = cl.mtime[0];
      s.flags = 0;
      if (bits & U_MODEL)
      {
            if (cls.protocol == PROTOCOL_NEHAHRABJP || cls.protocol == PROTOCOL_NEHAHRABJP2 || cls.protocol == PROTOCOL_NEHAHRABJP3)
                                          s.modelindex = (unsigned short) MSG_ReadShort();
            else
                                          s.modelindex = (s.modelindex & 0xFF00) | MSG_ReadByte();
      }
      if (bits & U_FRAME)           s.frame = (s.frame & 0xFF00) | MSG_ReadByte();
      if (bits & U_COLORMAP)  s.colormap = MSG_ReadByte();
      if (bits & U_SKIN)            s.skin = MSG_ReadByte();
      if (bits & U_EFFECTS)   s.effects = (s.effects & 0xFF00) | MSG_ReadByte();
      if (bits & U_ORIGIN1)   s.origin[0] = MSG_ReadCoord(cls.protocol);
      if (bits & U_ANGLE1)    s.angles[0] = MSG_ReadAngle(cls.protocol);
      if (bits & U_ORIGIN2)   s.origin[1] = MSG_ReadCoord(cls.protocol);
      if (bits & U_ANGLE2)    s.angles[1] = MSG_ReadAngle(cls.protocol);
      if (bits & U_ORIGIN3)   s.origin[2] = MSG_ReadCoord(cls.protocol);
      if (bits & U_ANGLE3)    s.angles[2] = MSG_ReadAngle(cls.protocol);
      if (bits & U_STEP)            s.flags |= RENDER_STEP;
      if (bits & U_ALPHA)           s.alpha = MSG_ReadByte();
      if (bits & U_SCALE)           s.scale = MSG_ReadByte();
      if (bits & U_EFFECTS2)  s.effects = (s.effects & 0x00FF) | (MSG_ReadByte() << 8);
      if (bits & U_GLOWSIZE)  s.glowsize = MSG_ReadByte();
      if (bits & U_GLOWCOLOR) s.glowcolor = MSG_ReadByte();
      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));}
      if (bits & U_GLOWTRAIL) s.flags |= RENDER_GLOWTRAIL;
      if (bits & U_FRAME2)    s.frame = (s.frame & 0x00FF) | (MSG_ReadByte() << 8);
      if (bits & U_MODEL2)    s.modelindex = (s.modelindex & 0x00FF) | (MSG_ReadByte() << 8);
      if (bits & U_VIEWMODEL) s.flags |= RENDER_VIEWMODEL;
      if (bits & U_EXTERIORMODEL)   s.flags |= RENDER_EXTERIORMODEL;

      // LordHavoc: to allow playback of the Nehahra movie
      if (cls.protocol == PROTOCOL_NEHAHRAMOVIE && (bits & U_EXTEND1))
      {
            // LordHavoc: evil format
            int i = (int)MSG_ReadFloat();
            int j = (int)(MSG_ReadFloat() * 255.0f);
            if (i == 2)
            {
                  i = (int)MSG_ReadFloat();
                  if (i)
                        s.effects |= EF_FULLBRIGHT;
            }
            if (j < 0)
                  s.alpha = 0;
            else if (j == 0 || j >= 255)
                  s.alpha = 255;
            else
                  s.alpha = j;
      }

      ent->state_previous = ent->state_current;
      ent->state_current = s;
      if (ent->state_current.active == ACTIVE_NETWORK)
      {
            CL_MoveLerpEntityStates(ent);
            cl.entities_active[ent->state_current.number] = true;
      }

      if (msg_badread)
            Host_Error("EntityFrameQuake_ReadEntity: read error");
}

void EntityFrameQuake_ISeeDeadEntities(void)
{
      int num, lastentity;
      if (cl.lastquakeentity == 0)
            return;
      lastentity = cl.lastquakeentity;
      cl.lastquakeentity = 0;
      for (num = 0;num <= lastentity;num++)
      {
            if (cl.isquakeentity[num])
            {
                  if (cl.entities_active[num] && cl.entities[num].state_current.time == cl.mtime[0])
                  {
                        cl.isquakeentity[num] = true;
                        cl.lastquakeentity = num;
                  }
                  else
                  {
                        cl.isquakeentity[num] = false;
                        cl.entities_active[num] = ACTIVE_NOT;
                        cl.entities[num].state_current = defaultstate;
                        cl.entities[num].state_current.number = num;
                  }
            }
      }
}

// NOTE: this only works with DP5 protocol and upwards. For lower protocols
// (including QUAKE), no packet loss handling for CSQC is done, which makes
// CSQC basically useless.
// Always use the DP5 protocol, or a higher one, when using CSQC entities.
static void EntityFrameCSQC_LostAllFrames(client_t *client)
{
      // mark ALL csqc entities as requiring a FULL resend!
      // I know this is a bad workaround, but better than nothing.
      int i, n;
      prvm_edict_t *ed;

      n = client->csqcnumedicts;
      for(i = 0; i < n; ++i)
      {
            if(client->csqcentityglobalhistory[i])
            {
                  ed = prog->edicts + i;
                  if (PRVM_serveredictfunction(ed, SendEntity))
                        client->csqcentitysendflags[i] |= 0xFFFFFF; // FULL RESEND
                  else // if it was ever sent to that client as a CSQC entity
                  {
                        client->csqcentityscope[i] = 1; // REMOVE
                        client->csqcentitysendflags[i] |= 0xFFFFFF;
                  }
            }
      }
}
void EntityFrameCSQC_LostFrame(client_t *client, int framenum)
{
      // marks a frame as lost
      int i, j;
      qboolean valid;
      int ringfirst, ringlast;
      static int recoversendflags[MAX_EDICTS];
      csqcentityframedb_t *d;

      if(client->csqcentityframe_lastreset < 0)
            return;
      if(framenum < client->csqcentityframe_lastreset)
            return; // no action required, as we resent that data anyway

      // is our frame out of history?
      ringfirst = client->csqcentityframehistory_next; // oldest entry
      ringlast = (ringfirst + NUM_CSQCENTITYDB_FRAMES - 1) % NUM_CSQCENTITYDB_FRAMES; // most recently added entry

      valid = false;
      
      for(j = 0; j < NUM_CSQCENTITYDB_FRAMES; ++j)
      {
            d = &client->csqcentityframehistory[(ringfirst + j) % NUM_CSQCENTITYDB_FRAMES];
            if(d->framenum < 0)
                  continue;
            if(d->framenum == framenum)
                  break;
            else if(d->framenum < framenum)
                  valid = true;
      }
      if(j == NUM_CSQCENTITYDB_FRAMES)
      {
            if(valid) // got beaten, i.e. there is a frame < framenum
            {
                  // a non-csqc frame got lost... great
                  return;
            }
            else
            {
                  // a too old frame got lost... sorry, cannot handle this
                  Con_DPrintf("CSQC entity DB: lost a frame too early to do any handling (resending ALL)...\n");
                  Con_DPrintf("Lost frame = %d\n", framenum);
                  Con_DPrintf("Entity DB = %d to %d\n", client->csqcentityframehistory[ringfirst].framenum, client->csqcentityframehistory[ringlast].framenum);
                  EntityFrameCSQC_LostAllFrames(client);
                  client->csqcentityframe_lastreset = -1;
            }
            return;
      }

      // so j is the frame that got lost
      // ringlast is the frame that we have to go to
      ringfirst = (ringfirst + j) % NUM_CSQCENTITYDB_FRAMES;
      if(ringlast < ringfirst)
            ringlast += NUM_CSQCENTITYDB_FRAMES;
      
      memset(recoversendflags, 0, sizeof(recoversendflags));

      for(j = ringfirst; j <= ringlast; ++j)
      {
            d = &client->csqcentityframehistory[j % NUM_CSQCENTITYDB_FRAMES];
            if(d->framenum < 0)
            {
                  // deleted frame
            }
            else if(d->framenum < framenum)
            {
                  // a frame in the past... should never happen
                  Con_Printf("CSQC entity DB encountered a frame from the past when recovering from PL...?\n");
            }
            else if(d->framenum == framenum)
            {
                  // handling the actually lost frame now
                  for(i = 0; i < d->num; ++i)
                  {
                        int sf = d->sendflags[i];
                        int ent = d->entno[i];
                        if(sf < 0) // remove
                              recoversendflags[ent] |= -1; // all bits, including sign
                        else if(sf > 0)
                              recoversendflags[ent] |= sf;
                  }
            }
            else
            {
                  // handling the frames that followed it now
                  for(i = 0; i < d->num; ++i)
                  {
                        int sf = d->sendflags[i];
                        int ent = d->entno[i];
                        if(sf < 0) // remove
                        {
                              recoversendflags[ent] = 0; // no need to update, we got a more recent remove (and will fix it THEN)
                              break; // no flags left to remove...
                        }
                        else if(sf > 0)
                              recoversendflags[ent] &= ~sf; // no need to update these bits, we already got them later
                  }
            }
      }

      for(i = 0; i < client->csqcnumedicts; ++i)
      {
            if(recoversendflags[i] < 0)
            {
                  // a remove got lost, then either send a remove or - if it was
                  // recreated later - a FULL update to make totally sure
                  client->csqcentityscope[i] = 1;
                  client->csqcentitysendflags[i] = 0xFFFFFF;
            }
            else
                  client->csqcentitysendflags[i] |= recoversendflags[i];
      }
}
static int EntityFrameCSQC_AllocFrame(client_t *client, int framenum)
{
      int ringfirst = client->csqcentityframehistory_next; // oldest entry
      client->csqcentityframehistory_next += 1;
      client->csqcentityframehistory_next %= NUM_CSQCENTITYDB_FRAMES;
      client->csqcentityframehistory[ringfirst].framenum = framenum;
      client->csqcentityframehistory[ringfirst].num = 0;
      return ringfirst;
}
static void EntityFrameCSQC_DeallocFrame(client_t *client, int framenum)
{
      int ringfirst = client->csqcentityframehistory_next; // oldest entry
      int ringlast = (ringfirst + NUM_CSQCENTITYDB_FRAMES - 1) % NUM_CSQCENTITYDB_FRAMES; // most recently added entry
      if(framenum == client->csqcentityframehistory[ringlast].framenum)
      {
            client->csqcentityframehistory[ringlast].framenum = -1;
            client->csqcentityframehistory[ringlast].num = 0;
            client->csqcentityframehistory_next = ringlast;
      }
      else
            Con_Printf("Trying to dealloc the wrong entity frame\n");
}

//[515]: we use only one array per-client for SendEntity feature
// TODO: add some handling for entity send priorities, to better deal with huge
// amounts of csqc networked entities
qboolean EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numnumbers, const unsigned short *numbers, int framenum)
{
      int num, number, end, sendflags;
      qboolean sectionstarted = false;
      const unsigned short *n;
      prvm_edict_t *ed;
      client_t *client = svs.clients + sv.writeentitiestoclient_clientnumber;
      int dbframe = EntityFrameCSQC_AllocFrame(client, framenum);
      csqcentityframedb_t *db = &client->csqcentityframehistory[dbframe];

      if(client->csqcentityframe_lastreset < 0)
            client->csqcentityframe_lastreset = framenum;

      maxsize -= 24; // always fit in an empty svc_entities message (for packet loss detection!)

      // make sure there is enough room to store the svc_csqcentities byte,
      // the terminator (0x0000) and at least one entity update
      if (msg->cursize + 32 >= maxsize)
            return false;

      if (client->csqcnumedicts < prog->num_edicts)
            client->csqcnumedicts = prog->num_edicts;

      number = 1;
      for (num = 0, n = numbers;num < numnumbers;num++, n++)
      {
            end = *n;
            for (;number < end;number++)
            {
                  if (client->csqcentityscope[number])
                  {
                        client->csqcentityscope[number] = 1;
                        client->csqcentitysendflags[number] = 0xFFFFFF;
                  }
            }
            ed = prog->edicts + number;
            if (PRVM_serveredictfunction(ed, SendEntity))
                  client->csqcentityscope[number] = 2;
            else if (client->csqcentityscope[number])
            {
                  client->csqcentityscope[number] = 1;
                  client->csqcentitysendflags[number] = 0xFFFFFF;
            }
            number++;
      }
      end = client->csqcnumedicts;
      for (;number < end;number++)
      {
            if (client->csqcentityscope[number])
            {
                  client->csqcentityscope[number] = 1;
                  client->csqcentitysendflags[number] = 0xFFFFFF;
            }
      }

      /*
      // mark all scope entities as remove
      for (number = 1;number < client->csqcnumedicts;number++)
            if (client->csqcentityscope[number])
                  client->csqcentityscope[number] = 1;
      // keep visible entities
      for (i = 0, n = numbers;i < numnumbers;i++, n++)
      {
            number = *n;
            ed = prog->edicts + number;
            if (PRVM_serveredictfunction(ed, SendEntity))
                  client->csqcentityscope[number] = 2;
      }
      */

      // now try to emit the entity updates
      // (FIXME: prioritize by distance?)
      end = client->csqcnumedicts;
      for (number = 1;number < end;number++)
      {
            if (!client->csqcentityscope[number])
                  continue;
            sendflags = client->csqcentitysendflags[number];
            if (!sendflags)
                  continue;
            if(db->num >= NUM_CSQCENTITIES_PER_FRAME)
                  break;
            ed = prog->edicts + number;
            // entity scope is either update (2) or remove (1)
            if (client->csqcentityscope[number] == 1)
            {
                  // write a remove message
                  // first write the message identifier if needed
                  if(!sectionstarted)
                  {
                        sectionstarted = 1;
                        MSG_WriteByte(msg, svc_csqcentities);
                  }
                  // write the remove message
                  {
                        ENTITYSIZEPROFILING_START(msg, number);
                        MSG_WriteShort(msg, (unsigned short)number | 0x8000);
                        client->csqcentityscope[number] = 0;
                        client->csqcentitysendflags[number] = 0xFFFFFF; // resend completely if it becomes active again
                        db->entno[db->num] = number;
                        db->sendflags[db->num] = -1;
                        db->num += 1;
                        client->csqcentityglobalhistory[number] = 1;
                        ENTITYSIZEPROFILING_END(msg, number);
                  }
                  if (msg->cursize + 17 >= maxsize)
                        break;
            }
            else
            {
                  // write an update
                  // save the cursize value in case we overflow and have to rollback
                  int oldcursize = msg->cursize;
                  client->csqcentityscope[number] = 1;
                  if (PRVM_serveredictfunction(ed, SendEntity))
                  {
                        if(!sectionstarted)
                              MSG_WriteByte(msg, svc_csqcentities);
                        {
                              ENTITYSIZEPROFILING_START(msg, number);
                              MSG_WriteShort(msg, number);
                              msg->allowoverflow = true;
                              PRVM_G_INT(OFS_PARM0) = sv.writeentitiestoclient_cliententitynumber;
                              PRVM_G_FLOAT(OFS_PARM1) = sendflags;
                              PRVM_serverglobaledict(self) = number;
                              PRVM_ExecuteProgram(PRVM_serveredictfunction(ed, SendEntity), "Null SendEntity\n");
                              msg->allowoverflow = false;
                              if(PRVM_G_FLOAT(OFS_RETURN) && msg->cursize + 2 <= maxsize)
                              {
                                    // an update has been successfully written
                                    client->csqcentitysendflags[number] = 0;
                                    db->entno[db->num] = number;
                                    db->sendflags[db->num] = sendflags;
                                    db->num += 1;
                                    client->csqcentityglobalhistory[number] = 1;
                                    // and take note that we have begun the svc_csqcentities
                                    // section of the packet
                                    sectionstarted = 1;
                                    ENTITYSIZEPROFILING_END(msg, number);
                                    if (msg->cursize + 17 >= maxsize)
                                          break;
                                    continue;
                              }
                        }
                  }
                  // self.SendEntity returned false (or does not exist) or the
                  // update was too big for this packet - rollback the buffer to its
                  // state before the writes occurred, we'll try again next frame
                  msg->cursize = oldcursize;
                  msg->overflowed = false;
            }
      }
      if (sectionstarted)
      {
            // write index 0 to end the update (0 is never used by real entities)
            MSG_WriteShort(msg, 0);
      }

      if(db->num == 0)
            // if no single ent got added, remove the frame from the DB again, to allow
            // for a larger history
            EntityFrameCSQC_DeallocFrame(client, framenum);
      
      return sectionstarted;
}

void Protocol_UpdateClientStats(const int *stats)
{
      int i;
      // update the stats array and set deltabits for any changed stats
      for (i = 0;i < MAX_CL_STATS;i++)
      {
            if (host_client->stats[i] != stats[i])
            {
                  host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
                  host_client->stats[i] = stats[i];
            }
      }
}

// only a few stats are within the 32 stat limit of Quake, and most of them
// are sent every frame in svc_clientdata messages, so we only send the
// remaining ones here
static const int sendquakestats[] =
{
// quake did not send these secrets/monsters stats in this way, but doing so
// allows a mod to increase STAT_TOTALMONSTERS during the game, and ensures
// that STAT_SECRETS and STAT_MONSTERS are always correct (even if a client
// didn't receive an svc_foundsecret or svc_killedmonster), which may be most
// valuable if randomly seeking around in a demo
STAT_TOTALSECRETS, // never changes during game
STAT_TOTALMONSTERS, // changes in some mods
STAT_SECRETS, // this makes svc_foundsecret unnecessary
STAT_MONSTERS, // this makes svc_killedmonster unnecessary
STAT_VIEWHEIGHT, // sent just for FTEQW clients
STAT_VIEWZOOM, // this rarely changes
-1,
};

void Protocol_WriteStatsReliable(void)
{
      int i, j;
      if (!host_client->netconnection)
            return;
      // detect changes in stats and write reliable messages
      // this only deals with 32 stats because the older protocols which use
      // this function can only cope with 32 stats,
      // they also do not support svc_updatestatubyte which was introduced in
      // DP6 protocol (except for QW)
      for (j = 0;sendquakestats[j] >= 0;j++)
      {
            i = sendquakestats[j];
            // check if this bit is set
            if (host_client->statsdeltabits[i >> 3] & (1 << (i & 7)))
            {
                  host_client->statsdeltabits[i >> 3] -= (1 << (i & 7));
                  // send the stat as a byte if possible
                  if (sv.protocol == PROTOCOL_QUAKEWORLD)
                  {
                        if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
                        {
                              MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestat);
                              MSG_WriteByte(&host_client->netconnection->message, i);
                              MSG_WriteByte(&host_client->netconnection->message, host_client->stats[i]);
                        }
                        else
                        {
                              MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestatlong);
                              MSG_WriteByte(&host_client->netconnection->message, i);
                              MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
                        }
                  }
                  else
                  {
                        // this could make use of svc_updatestatubyte in DP6 and later
                        // protocols but those protocols do not use this function
                        MSG_WriteByte(&host_client->netconnection->message, svc_updatestat);
                        MSG_WriteByte(&host_client->netconnection->message, i);
                        MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
                  }
            }
      }
}


qboolean EntityFrameQuake_WriteFrame(sizebuf_t *msg, int maxsize, int numstates, const entity_state_t **states)
{
      const entity_state_t *s;
      entity_state_t baseline;
      int i, bits;
      sizebuf_t buf;
      unsigned char data[128];
      qboolean success = false;

      // prepare the buffer
      memset(&buf, 0, sizeof(buf));
      buf.data = data;
      buf.maxsize = sizeof(data);

      for (i = 0;i < numstates;i++)
      {
            ENTITYSIZEPROFILING_START(msg, states[i]->number);
            s = states[i];
            if(PRVM_serveredictfunction((&prog->edicts[s->number]), SendEntity))
                  continue;

            // prepare the buffer
            SZ_Clear(&buf);

// send an update
            bits = 0;
            if (s->number >= 256)
                  bits |= U_LONGENTITY;
            if (s->flags & RENDER_STEP)
                  bits |= U_STEP;
            if (s->flags & RENDER_VIEWMODEL)
                  bits |= U_VIEWMODEL;
            if (s->flags & RENDER_GLOWTRAIL)
                  bits |= U_GLOWTRAIL;
            if (s->flags & RENDER_EXTERIORMODEL)
                  bits |= U_EXTERIORMODEL;

            // LordHavoc: old stuff, but rewritten to have more exact tolerances
            baseline = prog->edicts[s->number].priv.server->baseline;
            if (baseline.origin[0] != s->origin[0])
                  bits |= U_ORIGIN1;
            if (baseline.origin[1] != s->origin[1])
                  bits |= U_ORIGIN2;
            if (baseline.origin[2] != s->origin[2])
                  bits |= U_ORIGIN3;
            if (baseline.angles[0] != s->angles[0])
                  bits |= U_ANGLE1;
            if (baseline.angles[1] != s->angles[1])
                  bits |= U_ANGLE2;
            if (baseline.angles[2] != s->angles[2])
                  bits |= U_ANGLE3;
            if (baseline.colormap != s->colormap)
                  bits |= U_COLORMAP;
            if (baseline.skin != s->skin)
                  bits |= U_SKIN;
            if (baseline.frame != s->frame)
            {
                  bits |= U_FRAME;
                  if (s->frame & 0xFF00)
                        bits |= U_FRAME2;
            }
            if (baseline.effects != s->effects)
            {
                  bits |= U_EFFECTS;
                  if (s->effects & 0xFF00)
                        bits |= U_EFFECTS2;
            }
            if (baseline.modelindex != s->modelindex)
            {
                  bits |= U_MODEL;
                  if ((s->modelindex & 0xFF00) && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3)
                        bits |= U_MODEL2;
            }
            if (baseline.alpha != s->alpha)
                  bits |= U_ALPHA;
            if (baseline.scale != s->scale)
                  bits |= U_SCALE;
            if (baseline.glowsize != s->glowsize)
                  bits |= U_GLOWSIZE;
            if (baseline.glowcolor != s->glowcolor)
                  bits |= U_GLOWCOLOR;
            if (!VectorCompare(baseline.colormod, s->colormod))
                  bits |= U_COLORMOD;

            // if extensions are disabled, clear the relevant update flags
            if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
                  bits &= 0x7FFF;
            if (sv.protocol == PROTOCOL_NEHAHRAMOVIE)
                  if (s->alpha != 255 || s->effects & EF_FULLBRIGHT)
                        bits |= U_EXTEND1;

            // write the message
            if (bits >= 16777216)
                  bits |= U_EXTEND2;
            if (bits >= 65536)
                  bits |= U_EXTEND1;
            if (bits >= 256)
                  bits |= U_MOREBITS;
            bits |= U_SIGNAL;

            MSG_WriteByte (&buf, bits);
            if (bits & U_MOREBITS)        MSG_WriteByte(&buf, bits>>8);
            if (sv.protocol != PROTOCOL_NEHAHRAMOVIE)
            {
                  if (bits & U_EXTEND1)   MSG_WriteByte(&buf, bits>>16);
                  if (bits & U_EXTEND2)   MSG_WriteByte(&buf, bits>>24);
            }
            if (bits & U_LONGENTITY)      MSG_WriteShort(&buf, s->number);
            else                                MSG_WriteByte(&buf, s->number);

            if (bits & U_MODEL)
            {
                  if (sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3)
                        MSG_WriteShort(&buf, s->modelindex);
                  else
                        MSG_WriteByte(&buf, s->modelindex);
            }
            if (bits & U_FRAME)                 MSG_WriteByte(&buf, s->frame);
            if (bits & U_COLORMAP)        MSG_WriteByte(&buf, s->colormap);
            if (bits & U_SKIN)                  MSG_WriteByte(&buf, s->skin);
            if (bits & U_EFFECTS)         MSG_WriteByte(&buf, s->effects);
            if (bits & U_ORIGIN1)         MSG_WriteCoord(&buf, s->origin[0], sv.protocol);
            if (bits & U_ANGLE1)          MSG_WriteAngle(&buf, s->angles[0], sv.protocol);
            if (bits & U_ORIGIN2)         MSG_WriteCoord(&buf, s->origin[1], sv.protocol);
            if (bits & U_ANGLE2)          MSG_WriteAngle(&buf, s->angles[1], sv.protocol);
            if (bits & U_ORIGIN3)         MSG_WriteCoord(&buf, s->origin[2], sv.protocol);
            if (bits & U_ANGLE3)          MSG_WriteAngle(&buf, s->angles[2], sv.protocol);
            if (bits & U_ALPHA)                 MSG_WriteByte(&buf, s->alpha);
            if (bits & U_SCALE)                 MSG_WriteByte(&buf, s->scale);
            if (bits & U_EFFECTS2)        MSG_WriteByte(&buf, s->effects >> 8);
            if (bits & U_GLOWSIZE)        MSG_WriteByte(&buf, s->glowsize);
            if (bits & U_GLOWCOLOR)       MSG_WriteByte(&buf, s->glowcolor);
            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);}
            if (bits & U_FRAME2)          MSG_WriteByte(&buf, s->frame >> 8);
            if (bits & U_MODEL2)          MSG_WriteByte(&buf, s->modelindex >> 8);

            // the nasty protocol
            if ((bits & U_EXTEND1) && sv.protocol == PROTOCOL_NEHAHRAMOVIE)
            {
                  if (s->effects & EF_FULLBRIGHT)
                  {
                        MSG_WriteFloat(&buf, 2); // QSG protocol version
                        MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
                        MSG_WriteFloat(&buf, 1); // fullbright
                  }
                  else
                  {
                        MSG_WriteFloat(&buf, 1); // QSG protocol version
                        MSG_WriteFloat(&buf, s->alpha <= 0 ? 0 : (s->alpha >= 255 ? 1 : s->alpha * (1.0f / 255.0f))); // alpha
                  }
            }

            // if the commit is full, we're done this frame
            if (msg->cursize + buf.cursize > maxsize)
            {
                  // next frame we will continue where we left off
                  break;
            }
            // write the message to the packet
            SZ_Write(msg, buf.data, buf.cursize);
            success = true;
            ENTITYSIZEPROFILING_END(msg, s->number);
      }
      return success;
}

int EntityState_DeltaBits(const entity_state_t *o, const entity_state_t *n)
{
      unsigned int bits;
      // if o is not active, delta from default
      if (o->active != ACTIVE_NETWORK)
            o = &defaultstate;
      bits = 0;
      if (fabs(n->origin[0] - o->origin[0]) > (1.0f / 256.0f))
            bits |= E_ORIGIN1;
      if (fabs(n->origin[1] - o->origin[1]) > (1.0f / 256.0f))
            bits |= E_ORIGIN2;
      if (fabs(n->origin[2] - o->origin[2]) > (1.0f / 256.0f))
            bits |= E_ORIGIN3;
      if ((unsigned char) (n->angles[0] * (256.0f / 360.0f)) != (unsigned char) (o->angles[0] * (256.0f / 360.0f)))
            bits |= E_ANGLE1;
      if ((unsigned char) (n->angles[1] * (256.0f / 360.0f)) != (unsigned char) (o->angles[1] * (256.0f / 360.0f)))
            bits |= E_ANGLE2;
      if ((unsigned char) (n->angles[2] * (256.0f / 360.0f)) != (unsigned char) (o->angles[2] * (256.0f / 360.0f)))
            bits |= E_ANGLE3;
      if ((n->modelindex ^ o->modelindex) & 0x00FF)
            bits |= E_MODEL1;
      if ((n->modelindex ^ o->modelindex) & 0xFF00)
            bits |= E_MODEL2;
      if ((n->frame ^ o->frame) & 0x00FF)
            bits |= E_FRAME1;
      if ((n->frame ^ o->frame) & 0xFF00)
            bits |= E_FRAME2;
      if ((n->effects ^ o->effects) & 0x00FF)
            bits |= E_EFFECTS1;
      if ((n->effects ^ o->effects) & 0xFF00)
            bits |= E_EFFECTS2;
      if (n->colormap != o->colormap)
            bits |= E_COLORMAP;
      if (n->skin != o->skin)
            bits |= E_SKIN;
      if (n->alpha != o->alpha)
            bits |= E_ALPHA;
      if (n->scale != o->scale)
            bits |= E_SCALE;
      if (n->glowsize != o->glowsize)
            bits |= E_GLOWSIZE;
      if (n->glowcolor != o->glowcolor)
            bits |= E_GLOWCOLOR;
      if (n->flags != o->flags)
            bits |= E_FLAGS;
      if (n->tagindex != o->tagindex || n->tagentity != o->tagentity)
            bits |= E_TAGATTACHMENT;
      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])
            bits |= E_LIGHT;
      if (n->lightstyle != o->lightstyle)
            bits |= E_LIGHTSTYLE;
      if (n->lightpflags != o->lightpflags)
            bits |= E_LIGHTPFLAGS;

      if (bits)
      {
            if (bits &  0xFF000000)
                  bits |= 0x00800000;
            if (bits &  0x00FF0000)
                  bits |= 0x00008000;
            if (bits &  0x0000FF00)
                  bits |= 0x00000080;
      }
      return bits;
}

void EntityState_WriteExtendBits(sizebuf_t *msg, unsigned int bits)
{
      MSG_WriteByte(msg, bits & 0xFF);
      if (bits & 0x00000080)
      {
            MSG_WriteByte(msg, (bits >> 8) & 0xFF);
            if (bits & 0x00008000)
            {
                  MSG_WriteByte(msg, (bits >> 16) & 0xFF);
                  if (bits & 0x00800000)
                        MSG_WriteByte(msg, (bits >> 24) & 0xFF);
            }
      }
}

void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned int bits)
{
      if (sv.protocol == PROTOCOL_DARKPLACES2)
      {
            if (bits & E_ORIGIN1)
                  MSG_WriteCoord16i(msg, ent->origin[0]);
            if (bits & E_ORIGIN2)
                  MSG_WriteCoord16i(msg, ent->origin[1]);
            if (bits & E_ORIGIN3)
                  MSG_WriteCoord16i(msg, ent->origin[2]);
      }
      else
      {
            // LordHavoc: have to write flags first, as they can modify protocol
            if (bits & E_FLAGS)
                  MSG_WriteByte(msg, ent->flags);
            if (ent->flags & RENDER_LOWPRECISION)
            {
                  if (bits & E_ORIGIN1)
                        MSG_WriteCoord16i(msg, ent->origin[0]);
                  if (bits & E_ORIGIN2)
                        MSG_WriteCoord16i(msg, ent->origin[1]);
                  if (bits & E_ORIGIN3)
                        MSG_WriteCoord16i(msg, ent->origin[2]);
            }
            else
            {
                  if (bits & E_ORIGIN1)
                        MSG_WriteCoord32f(msg, ent->origin[0]);
                  if (bits & E_ORIGIN2)
                        MSG_WriteCoord32f(msg, ent->origin[1]);
                  if (bits & E_ORIGIN3)
                        MSG_WriteCoord32f(msg, ent->origin[2]);
            }
      }
      if ((sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4) && (ent->flags & RENDER_LOWPRECISION))
      {
            if (bits & E_ANGLE1)
                  MSG_WriteAngle8i(msg, ent->angles[0]);
            if (bits & E_ANGLE2)
                  MSG_WriteAngle8i(msg, ent->angles[1]);
            if (bits & E_ANGLE3)
                  MSG_WriteAngle8i(msg, ent->angles[2]);
      }
      else
      {
            if (bits & E_ANGLE1)
                  MSG_WriteAngle16i(msg, ent->angles[0]);
            if (bits & E_ANGLE2)
                  MSG_WriteAngle16i(msg, ent->angles[1]);
            if (bits & E_ANGLE3)
                  MSG_WriteAngle16i(msg, ent->angles[2]);
      }
      if (bits & E_MODEL1)
            MSG_WriteByte(msg, ent->modelindex & 0xFF);
      if (bits & E_MODEL2)
            MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
      if (bits & E_FRAME1)
            MSG_WriteByte(msg, ent->frame & 0xFF);
      if (bits & E_FRAME2)
            MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
      if (bits & E_EFFECTS1)
            MSG_WriteByte(msg, ent->effects & 0xFF);
      if (bits & E_EFFECTS2)
            MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
      if (bits & E_COLORMAP)
            MSG_WriteByte(msg, ent->colormap);
      if (bits & E_SKIN)
            MSG_WriteByte(msg, ent->skin);
      if (bits & E_ALPHA)
            MSG_WriteByte(msg, ent->alpha);
      if (bits & E_SCALE)
            MSG_WriteByte(msg, ent->scale);
      if (bits & E_GLOWSIZE)
            MSG_WriteByte(msg, ent->glowsize);
      if (bits & E_GLOWCOLOR)
            MSG_WriteByte(msg, ent->glowcolor);
      if (sv.protocol == PROTOCOL_DARKPLACES2)
            if (bits & E_FLAGS)
                  MSG_WriteByte(msg, ent->flags);
      if (bits & E_TAGATTACHMENT)
      {
            MSG_WriteShort(msg, ent->tagentity);
            MSG_WriteByte(msg, ent->tagindex);
      }
      if (bits & E_LIGHT)
      {
            MSG_WriteShort(msg, ent->light[0]);
            MSG_WriteShort(msg, ent->light[1]);
            MSG_WriteShort(msg, ent->light[2]);
            MSG_WriteShort(msg, ent->light[3]);
      }
      if (bits & E_LIGHTSTYLE)
            MSG_WriteByte(msg, ent->lightstyle);
      if (bits & E_LIGHTPFLAGS)
            MSG_WriteByte(msg, ent->lightpflags);
}

void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
{
      unsigned int bits;
      ENTITYSIZEPROFILING_START(msg, ent->number);
      if (ent->active == ACTIVE_NETWORK)
      {
            // entity is active, check for changes from the delta
            if ((bits = EntityState_DeltaBits(delta, ent)))
            {
                  // write the update number, bits, and fields
                  MSG_WriteShort(msg, ent->number);
                  EntityState_WriteExtendBits(msg, bits);
                  EntityState_WriteFields(ent, msg, bits);
            }
      }
      else
      {
            // entity is inactive, check if the delta was active
            if (delta->active == ACTIVE_NETWORK)
            {
                  // write the remove number
                  MSG_WriteShort(msg, ent->number | 0x8000);
            }
      }
      ENTITYSIZEPROFILING_END(msg, ent->number);
}

int EntityState_ReadExtendBits(void)
{
      unsigned int bits;
      bits = MSG_ReadByte();
      if (bits & 0x00000080)
      {
            bits |= MSG_ReadByte() << 8;
            if (bits & 0x00008000)
            {
                  bits |= MSG_ReadByte() << 16;
                  if (bits & 0x00800000)
                        bits |= MSG_ReadByte() << 24;
            }
      }
      return bits;
}

void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
{
      if (cls.protocol == PROTOCOL_DARKPLACES2)
      {
            if (bits & E_ORIGIN1)
                  e->origin[0] = MSG_ReadCoord16i();
            if (bits & E_ORIGIN2)
                  e->origin[1] = MSG_ReadCoord16i();
            if (bits & E_ORIGIN3)
                  e->origin[2] = MSG_ReadCoord16i();
      }
      else
      {
            if (bits & E_FLAGS)
                  e->flags = MSG_ReadByte();
            if (e->flags & RENDER_LOWPRECISION)
            {
                  if (bits & E_ORIGIN1)
                        e->origin[0] = MSG_ReadCoord16i();
                  if (bits & E_ORIGIN2)
                        e->origin[1] = MSG_ReadCoord16i();
                  if (bits & E_ORIGIN3)
                        e->origin[2] = MSG_ReadCoord16i();
            }
            else
            {
                  if (bits & E_ORIGIN1)
                        e->origin[0] = MSG_ReadCoord32f();
                  if (bits & E_ORIGIN2)
                        e->origin[1] = MSG_ReadCoord32f();
                  if (bits & E_ORIGIN3)
                        e->origin[2] = MSG_ReadCoord32f();
            }
      }
      if ((cls.protocol == PROTOCOL_DARKPLACES5 || cls.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
      {
            if (bits & E_ANGLE1)
                  e->angles[0] = MSG_ReadAngle16i();
            if (bits & E_ANGLE2)
                  e->angles[1] = MSG_ReadAngle16i();
            if (bits & E_ANGLE3)
                  e->angles[2] = MSG_ReadAngle16i();
      }
      else
      {
            if (bits & E_ANGLE1)
                  e->angles[0] = MSG_ReadAngle8i();
            if (bits & E_ANGLE2)
                  e->angles[1] = MSG_ReadAngle8i();
            if (bits & E_ANGLE3)
                  e->angles[2] = MSG_ReadAngle8i();
      }
      if (bits & E_MODEL1)
            e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
      if (bits & E_MODEL2)
            e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
      if (bits & E_FRAME1)
            e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
      if (bits & E_FRAME2)
            e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
      if (bits & E_EFFECTS1)
            e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
      if (bits & E_EFFECTS2)
            e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
      if (bits & E_COLORMAP)
            e->colormap = MSG_ReadByte();
      if (bits & E_SKIN)
            e->skin = MSG_ReadByte();
      if (bits & E_ALPHA)
            e->alpha = MSG_ReadByte();
      if (bits & E_SCALE)
            e->scale = MSG_ReadByte();
      if (bits & E_GLOWSIZE)
            e->glowsize = MSG_ReadByte();
      if (bits & E_GLOWCOLOR)
            e->glowcolor = MSG_ReadByte();
      if (cls.protocol == PROTOCOL_DARKPLACES2)
            if (bits & E_FLAGS)
                  e->flags = MSG_ReadByte();
      if (bits & E_TAGATTACHMENT)
      {
            e->tagentity = (unsigned short) MSG_ReadShort();
            e->tagindex = MSG_ReadByte();
      }
      if (bits & E_LIGHT)
      {
            e->light[0] = (unsigned short) MSG_ReadShort();
            e->light[1] = (unsigned short) MSG_ReadShort();
            e->light[2] = (unsigned short) MSG_ReadShort();
            e->light[3] = (unsigned short) MSG_ReadShort();
      }
      if (bits & E_LIGHTSTYLE)
            e->lightstyle = MSG_ReadByte();
      if (bits & E_LIGHTPFLAGS)
            e->lightpflags = MSG_ReadByte();

      if (developer_networkentities.integer >= 2)
      {
            Con_Printf("ReadFields e%i", e->number);

            if (bits & E_ORIGIN1)
                  Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
            if (bits & E_ORIGIN2)
                  Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
            if (bits & E_ORIGIN3)
                  Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
            if (bits & E_ANGLE1)
                  Con_Printf(" E_ANGLE1 %f", e->angles[0]);
            if (bits & E_ANGLE2)
                  Con_Printf(" E_ANGLE2 %f", e->angles[1]);
            if (bits & E_ANGLE3)
                  Con_Printf(" E_ANGLE3 %f", e->angles[2]);
            if (bits & (E_MODEL1 | E_MODEL2))
                  Con_Printf(" E_MODEL %i", e->modelindex);

            if (bits & (E_FRAME1 | E_FRAME2))
                  Con_Printf(" E_FRAME %i", e->frame);
            if (bits & (E_EFFECTS1 | E_EFFECTS2))
                  Con_Printf(" E_EFFECTS %i", e->effects);
            if (bits & E_ALPHA)
                  Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
            if (bits & E_SCALE)
                  Con_Printf(" E_SCALE %f", e->scale / 16.0f);
            if (bits & E_COLORMAP)
                  Con_Printf(" E_COLORMAP %i", e->colormap);
            if (bits & E_SKIN)
                  Con_Printf(" E_SKIN %i", e->skin);

            if (bits & E_GLOWSIZE)
                  Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
            if (bits & E_GLOWCOLOR)
                  Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);

            if (bits & E_LIGHT)
                  Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
            if (bits & E_LIGHTPFLAGS)
                  Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);

            if (bits & E_TAGATTACHMENT)
                  Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
            if (bits & E_LIGHTSTYLE)
                  Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
            Con_Print("\n");
      }
}

extern void CL_NewFrameReceived(int num);

// (client and server) allocates a new empty database
entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
{
      return (entityframe_database_t *)Mem_Alloc(mempool, sizeof(entityframe_database_t));
}

// (client and server) frees the database
void EntityFrame_FreeDatabase(entityframe_database_t *d)
{
      Mem_Free(d);
}

// (server) clears the database to contain no frames (thus delta compression compresses against nothing)
void EntityFrame_ClearDatabase(entityframe_database_t *d)
{
      memset(d, 0, sizeof(*d));
}

// (server and client) removes frames older than 'frame' from database
void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
{
      int i;
      d->ackframenum = frame;
      for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
      // ignore outdated frame acks (out of order packets)
      if (i == 0)
            return;
      d->numframes -= i;
      // if some queue is left, slide it down to beginning of array
      if (d->numframes)
            memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
}

// (server) clears frame, to prepare for adding entities
void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
{
      f->time = 0;
      f->framenum = framenum;
      f->numentities = 0;
      if (eye == NULL)
            VectorClear(f->eye);
      else
            VectorCopy(eye, f->eye);
}

// (server and client) reads a frame from the database
void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
{
      int i, n;
      EntityFrame_Clear(f, NULL, -1);
      for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
      if (i < d->numframes && framenum == d->frames[i].framenum)
      {
            f->framenum = framenum;
            f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
            n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
            if (n > f->numentities)
                  n = f->numentities;
            memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
            if (f->numentities > n)
                  memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
            VectorCopy(d->eye, f->eye);
      }
}

// (client) adds a entity_frame to the database, for future reference
void EntityFrame_AddFrame_Client(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
{
      int n, e;
      entity_frameinfo_t *info;

      VectorCopy(eye, d->eye);

      // figure out how many entity slots are used already
      if (d->numframes)
      {
            n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
            if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
            {
                  // ran out of room, dump database
                  EntityFrame_ClearDatabase(d);
            }
      }

      info = &d->frames[d->numframes];
      info->framenum = framenum;
      e = -1000;
      // make sure we check the newly added frame as well, but we haven't incremented numframes yet
      for (n = 0;n <= d->numframes;n++)
      {
            if (e >= d->frames[n].framenum)
            {
                  if (e == framenum)
                        Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
                  else
                        Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
                  return;
            }
            e = d->frames[n].framenum;
      }
      // if database still has frames after that...
      if (d->numframes)
            info->firstentity = d->frames[d->numframes - 1].endentity;
      else
            info->firstentity = 0;
      info->endentity = info->firstentity + numentities;
      d->numframes++;

      n = info->firstentity % MAX_ENTITY_DATABASE;
      e = MAX_ENTITY_DATABASE - n;
      if (e > numentities)
            e = numentities;
      memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
      if (numentities > e)
            memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
}

// (server) adds a entity_frame to the database, for future reference
void EntityFrame_AddFrame_Server(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t **entitydata)
{
      int n, e;
      entity_frameinfo_t *info;

      VectorCopy(eye, d->eye);

      // figure out how many entity slots are used already
      if (d->numframes)
      {
            n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
            if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
            {
                  // ran out of room, dump database
                  EntityFrame_ClearDatabase(d);
            }
      }

      info = &d->frames[d->numframes];
      info->framenum = framenum;
      e = -1000;
      // make sure we check the newly added frame as well, but we haven't incremented numframes yet
      for (n = 0;n <= d->numframes;n++)
      {
            if (e >= d->frames[n].framenum)
            {
                  if (e == framenum)
                        Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
                  else
                        Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
                  return;
            }
            e = d->frames[n].framenum;
      }
      // if database still has frames after that...
      if (d->numframes)
            info->firstentity = d->frames[d->numframes - 1].endentity;
      else
            info->firstentity = 0;
      info->endentity = info->firstentity + numentities;
      d->numframes++;

      n = info->firstentity % MAX_ENTITY_DATABASE;
      e = MAX_ENTITY_DATABASE - n;
      if (e > numentities)
            e = numentities;
      memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
      if (numentities > e)
            memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
}

// (server) writes a frame to network stream
qboolean EntityFrame_WriteFrame(sizebuf_t *msg, int maxsize, entityframe_database_t *d, int numstates, const entity_state_t **states, int viewentnum)
{
      int i, onum, number;
      entity_frame_t *o = &d->deltaframe;
      const entity_state_t *ent, *delta;
      vec3_t eye;

      d->latestframenum++;

      VectorClear(eye);
      for (i = 0;i < numstates;i++)
      {
            ent = states[i];
            if (ent->number == viewentnum)
            {
                  VectorSet(eye, ent->origin[0], ent->origin[1], ent->origin[2] + 22);
                  break;
            }
      }

      EntityFrame_AddFrame_Server(d, eye, d->latestframenum, numstates, states);

      EntityFrame_FetchFrame(d, d->ackframenum, o);

      MSG_WriteByte (msg, svc_entities);
      MSG_WriteLong (msg, o->framenum);
      MSG_WriteLong (msg, d->latestframenum);
      MSG_WriteFloat (msg, eye[0]);
      MSG_WriteFloat (msg, eye[1]);
      MSG_WriteFloat (msg, eye[2]);

      onum = 0;
      for (i = 0;i < numstates;i++)
      {
            ent = states[i];
            number = ent->number;

            if (PRVM_serveredictfunction((&prog->edicts[number]), SendEntity))
                  continue;
            for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
            {
                  // write remove message
                  MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
            }
            if (onum < o->numentities && (o->entitydata[onum].number == number))
            {
                  // delta from previous frame
                  delta = o->entitydata + onum;
                  // advance to next entity in delta frame
                  onum++;
            }
            else
            {
                  // delta from defaults
                  delta = &defaultstate;
            }
            EntityState_WriteUpdate(ent, msg, delta);
      }
      for (;onum < o->numentities;onum++)
      {
            // write remove message
            MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
      }
      MSG_WriteShort(msg, 0xFFFF);

      return true;
}

// (client) reads a frame from network stream
void EntityFrame_CL_ReadFrame(void)
{
      int i, number, removed;
      entity_frame_t *f, *delta;
      entity_state_t *e, *old, *oldend;
      entity_t *ent;
      entityframe_database_t *d;
      if (!cl.entitydatabase)
            cl.entitydatabase = EntityFrame_AllocDatabase(cls.levelmempool);
      d = cl.entitydatabase;
      f = &d->framedata;
      delta = &d->deltaframe;

      EntityFrame_Clear(f, NULL, -1);

      // read the frame header info
      f->time = cl.mtime[0];
      number = MSG_ReadLong();
      f->framenum = MSG_ReadLong();
      CL_NewFrameReceived(f->framenum);
      f->eye[0] = MSG_ReadFloat();
      f->eye[1] = MSG_ReadFloat();
      f->eye[2] = MSG_ReadFloat();
      EntityFrame_AckFrame(d, number);
      EntityFrame_FetchFrame(d, number, delta);
      old = delta->entitydata;
      oldend = old + delta->numentities;
      // read entities until we hit the magic 0xFFFF end tag
      while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
      {
            if (msg_badread)
                  Host_Error("EntityFrame_Read: read error");
            removed = number & 0x8000;
            number &= 0x7FFF;
            if (number >= MAX_EDICTS)
                  Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)", number, MAX_EDICTS);

            // seek to entity, while copying any skipped entities (assume unchanged)
            while (old < oldend && old->number < number)
            {
                  if (f->numentities >= MAX_ENTITY_DATABASE)
                        Host_Error("EntityFrame_Read: entity list too big");
                  f->entitydata[f->numentities] = *old++;
                  f->entitydata[f->numentities++].time = cl.mtime[0];
            }
            if (removed)
            {
                  if (old < oldend && old->number == number)
                        old++;
                  else
                        Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
            }
            else
            {
                  if (f->numentities >= MAX_ENTITY_DATABASE)
                        Host_Error("EntityFrame_Read: entity list too big");

                  // reserve this slot
                  e = f->entitydata + f->numentities++;

                  if (old < oldend && old->number == number)
                  {
                        // delta from old entity
                        *e = *old++;
                  }
                  else
                  {
                        // delta from defaults
                        *e = defaultstate;
                  }

                  if (cl.num_entities <= number)
                  {
                        cl.num_entities = number + 1;
                        if (number >= cl.max_entities)
                              CL_ExpandEntities(number);
                  }
                  cl.entities_active[number] = true;
                  e->active = ACTIVE_NETWORK;
                  e->time = cl.mtime[0];
                  e->number = number;
                  EntityState_ReadFields(e, EntityState_ReadExtendBits());
            }
      }
      while (old < oldend)
      {
            if (f->numentities >= MAX_ENTITY_DATABASE)
                  Host_Error("EntityFrame_Read: entity list too big");
            f->entitydata[f->numentities] = *old++;
            f->entitydata[f->numentities++].time = cl.mtime[0];
      }
      EntityFrame_AddFrame_Client(d, f->eye, f->framenum, f->numentities, f->entitydata);

      memset(cl.entities_active, 0, cl.num_entities * sizeof(unsigned char));
      number = 1;
      for (i = 0;i < f->numentities;i++)
      {
            for (;number < f->entitydata[i].number && number < cl.num_entities;number++)
            {
                  if (cl.entities_active[number])
                  {
                        cl.entities_active[number] = false;
                        cl.entities[number].state_current.active = ACTIVE_NOT;
                  }
            }
            if (number >= cl.num_entities)
                  break;
            // update the entity
            ent = &cl.entities[number];
            ent->state_previous = ent->state_current;
            ent->state_current = f->entitydata[i];
            CL_MoveLerpEntityStates(ent);
            // the entity lives again...
            cl.entities_active[number] = true;
            number++;
      }
      for (;number < cl.num_entities;number++)
      {
            if (cl.entities_active[number])
            {
                  cl.entities_active[number] = false;
                  cl.entities[number].state_current.active = ACTIVE_NOT;
            }
      }
}


// (client) returns the frame number of the most recent frame recieved
int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
{
      if (d->numframes)
            return d->frames[d->numframes - 1].framenum;
      else
            return -1;
}






entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
{
      if (d->maxreferenceentities <= number)
      {
            int oldmax = d->maxreferenceentities;
            entity_state_t *oldentity = d->referenceentity;
            d->maxreferenceentities = (number + 15) & ~7;
            d->referenceentity = (entity_state_t *)Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
            if (oldentity)
            {
                  memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
                  Mem_Free(oldentity);
            }
            // clear the newly created entities
            for (;oldmax < d->maxreferenceentities;oldmax++)
            {
                  d->referenceentity[oldmax] = defaultstate;
                  d->referenceentity[oldmax].number = oldmax;
            }
      }
      return d->referenceentity + number;
}

void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
{
      // resize commit's entity list if full
      if (d->currentcommit->maxentities <= d->currentcommit->numentities)
      {
            entity_state_t *oldentity = d->currentcommit->entity;
            d->currentcommit->maxentities += 8;
            d->currentcommit->entity = (entity_state_t *)Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
            if (oldentity)
            {
                  memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
                  Mem_Free(oldentity);
            }
      }
      d->currentcommit->entity[d->currentcommit->numentities++] = *s;
}

entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
{
      entityframe4_database_t *d;
      d = (entityframe4_database_t *)Mem_Alloc(pool, sizeof(*d));
      d->mempool = pool;
      EntityFrame4_ResetDatabase(d);
      return d;
}

void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
{
      int i;
      for (i = 0;i < MAX_ENTITY_HISTORY;i++)
            if (d->commit[i].entity)
                  Mem_Free(d->commit[i].entity);
      if (d->referenceentity)
            Mem_Free(d->referenceentity);
      Mem_Free(d);
}

void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
{
      int i;
      d->referenceframenum = -1;
      for (i = 0;i < MAX_ENTITY_HISTORY;i++)
            d->commit[i].numentities = 0;
      for (i = 0;i < d->maxreferenceentities;i++)
            d->referenceentity[i] = defaultstate;
}

int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
{
      int i, j, found;
      entity_database4_commit_t *commit;
      if (framenum == -1)
      {
            // reset reference, but leave commits alone
            d->referenceframenum = -1;
            for (i = 0;i < d->maxreferenceentities;i++)
                  d->referenceentity[i] = defaultstate;
            // if this is the server, remove commits
                  for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
                        commit->numentities = 0;
            found = true;
      }
      else if (d->referenceframenum == framenum)
            found = true;
      else
      {
            found = false;
            for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
            {
                  if (commit->numentities && commit->framenum <= framenum)
                  {
                        if (commit->framenum == framenum)
                        {
                              found = true;
                              d->referenceframenum = framenum;
                              if (developer_networkentities.integer >= 3)
                              {
                                    for (j = 0;j < commit->numentities;j++)
                                    {
                                          entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
                                          if (commit->entity[j].active != s->active)
                                          {
                                                if (commit->entity[j].active == ACTIVE_NETWORK)
                                                      Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
                                                else
                                                      Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
                                          }
                                          *s = commit->entity[j];
                                    }
                              }
                              else
                                    for (j = 0;j < commit->numentities;j++)
                                          *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
                        }
                        commit->numentities = 0;
                  }
            }
      }
      if (developer_networkentities.integer >= 1)
      {
            Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
            for (i = 0;i < MAX_ENTITY_HISTORY;i++)
                  if (d->commit[i].numentities)
                        Con_Printf(" %i", d->commit[i].framenum);
            Con_Print("\n");
      }
      return found;
}

void EntityFrame4_CL_ReadFrame(void)
{
      int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
      entity_state_t *s;
      entityframe4_database_t *d;
      if (!cl.entitydatabase4)
            cl.entitydatabase4 = EntityFrame4_AllocDatabase(cls.levelmempool);
      d = cl.entitydatabase4;
      // read the number of the frame this refers to
      referenceframenum = MSG_ReadLong();
      // read the number of this frame
      framenum = MSG_ReadLong();
      CL_NewFrameReceived(framenum);
      // read the start number
      enumber = (unsigned short) MSG_ReadShort();
      if (developer_networkentities.integer >= 10)
      {
            Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
            for (i = 0;i < MAX_ENTITY_HISTORY;i++)
                  if (d->commit[i].numentities)
                        Con_Printf(" %i", d->commit[i].framenum);
            Con_Print("\n");
      }
      if (!EntityFrame4_AckFrame(d, referenceframenum, false))
      {
            Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
            skip = true;
      }
      d->currentcommit = NULL;
      for (i = 0;i < MAX_ENTITY_HISTORY;i++)
      {
            if (!d->commit[i].numentities)
            {
                  d->currentcommit = d->commit + i;
                  d->currentcommit->framenum = framenum;
                  d->currentcommit->numentities = 0;
            }
      }
      if (d->currentcommit == NULL)
      {
            Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
            skip = true;
      }
      done = false;
      while (!done && !msg_badread)
      {
            // read the number of the modified entity
            // (gaps will be copied unmodified)
            n = (unsigned short)MSG_ReadShort();
            if (n == 0x8000)
            {
                  // no more entities in this update, but we still need to copy the
                  // rest of the reference entities (final gap)
                  done = true;
                  // read end of range number, then process normally
                  n = (unsigned short)MSG_ReadShort();
            }
            // high bit means it's a remove message
            cnumber = n & 0x7FFF;
            // if this is a live entity we may need to expand the array
            if (cl.num_entities <= cnumber && !(n & 0x8000))
            {
                  cl.num_entities = cnumber + 1;
                  if (cnumber >= cl.max_entities)
                        CL_ExpandEntities(cnumber);
            }
            // add one (the changed one) if not done
            stopnumber = cnumber + !done;
            // process entities in range from the last one to the changed one
            for (;enumber < stopnumber;enumber++)
            {
                  if (skip || enumber >= cl.num_entities)
                  {
                        if (enumber == cnumber && (n & 0x8000) == 0)
                        {
                              entity_state_t tempstate;
                              EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
                        }
                        continue;
                  }
                  // slide the current into the previous slot
                  cl.entities[enumber].state_previous = cl.entities[enumber].state_current;
                  // copy a new current from reference database
                  cl.entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
                  s = &cl.entities[enumber].state_current;
                  // if this is the one to modify, read more data...
                  if (enumber == cnumber)
                  {
                        if (n & 0x8000)
                        {
                              // simply removed
                              if (developer_networkentities.integer >= 2)
                                    Con_Printf("entity %i: remove\n", enumber);
                              *s = defaultstate;
                        }
                        else
                        {
                              // read the changes
                              if (developer_networkentities.integer >= 2)
                                    Con_Printf("entity %i: update\n", enumber);
                              s->active = ACTIVE_NETWORK;
                              EntityState_ReadFields(s, EntityState_ReadExtendBits());
                        }
                  }
                  else if (developer_networkentities.integer >= 4)
                        Con_Printf("entity %i: copy\n", enumber);
                  // set the cl.entities_active flag
                  cl.entities_active[enumber] = (s->active == ACTIVE_NETWORK);
                  // set the update time
                  s->time = cl.mtime[0];
                  // fix the number (it gets wiped occasionally by copying from defaultstate)
                  s->number = enumber;
                  // check if we need to update the lerp stuff
                  if (s->active == ACTIVE_NETWORK)
                        CL_MoveLerpEntityStates(&cl.entities[enumber]);
                  // add this to the commit entry whether it is modified or not
                  if (d->currentcommit)
                        EntityFrame4_AddCommitEntity(d, &cl.entities[enumber].state_current);
                  // print extra messages if desired
                  if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
                  {
                        if (cl.entities[enumber].state_current.active == ACTIVE_NETWORK)
                              Con_Printf("entity #%i has become active\n", enumber);
                        else if (cl.entities[enumber].state_previous.active)
                              Con_Printf("entity #%i has become inactive\n", enumber);
                  }
            }
      }
      d->currentcommit = NULL;
      if (skip)
            EntityFrame4_ResetDatabase(d);
}

qboolean EntityFrame4_WriteFrame(sizebuf_t *msg, int maxsize, entityframe4_database_t *d, int numstates, const entity_state_t **states)
{
      const entity_state_t *e, *s;
      entity_state_t inactiveentitystate;
      int i, n, startnumber;
      sizebuf_t buf;
      unsigned char data[128];

      // if there isn't enough space to accomplish anything, skip it
      if (msg->cursize + 24 > maxsize)
            return false;

      // prepare the buffer
      memset(&buf, 0, sizeof(buf));
      buf.data = data;
      buf.maxsize = sizeof(data);

      for (i = 0;i < MAX_ENTITY_HISTORY;i++)
            if (!d->commit[i].numentities)
                  break;
      // if commit buffer full, just don't bother writing an update this frame
      if (i == MAX_ENTITY_HISTORY)
            return false;
      d->currentcommit = d->commit + i;

      // this state's number gets played around with later
      inactiveentitystate = defaultstate;

      d->currentcommit->numentities = 0;
      d->currentcommit->framenum = ++d->latestframenumber;
      MSG_WriteByte(msg, svc_entities);
      MSG_WriteLong(msg, d->referenceframenum);
      MSG_WriteLong(msg, d->currentcommit->framenum);
      if (developer_networkentities.integer >= 10)
      {
            Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
            for (i = 0;i < MAX_ENTITY_HISTORY;i++)
                  if (d->commit[i].numentities)
                        Con_Printf(" %i", d->commit[i].framenum);
            Con_Print(")\n");
      }
      if (d->currententitynumber >= prog->max_edicts)
            startnumber = 1;
      else
            startnumber = bound(1, d->currententitynumber, prog->max_edicts - 1);
      MSG_WriteShort(msg, startnumber);
      // reset currententitynumber so if the loop does not break it we will
      // start at beginning next frame (if it does break, it will set it)
      d->currententitynumber = 1;
      for (i = 0, n = startnumber;n < prog->max_edicts;n++)
      {
            if (PRVM_serveredictfunction((&prog->edicts[n]), SendEntity))
                  continue;
            // find the old state to delta from
            e = EntityFrame4_GetReferenceEntity(d, n);
            // prepare the buffer
            SZ_Clear(&buf);
            // entity exists, build an update (if empty there is no change)
            // find the state in the list
            for (;i < numstates && states[i]->number < n;i++);
            // make the message
            s = states[i];
            if (s->number == n)
            {
                  // build the update
                  EntityState_WriteUpdate(s, &buf, e);
            }
            else
            {
                  inactiveentitystate.number = n;
                  s = &inactiveentitystate;
                  if (e->active == ACTIVE_NETWORK)
                  {
                        // entity used to exist but doesn't anymore, send remove
                        MSG_WriteShort(&buf, n | 0x8000);
                  }
            }
            // if the commit is full, we're done this frame
            if (msg->cursize + buf.cursize > maxsize - 4)
            {
                  // next frame we will continue where we left off
                  break;
            }
            // add the entity to the commit
            EntityFrame4_AddCommitEntity(d, s);
            // if the message is empty, skip out now
            if (buf.cursize)
            {
                  // write the message to the packet
                  SZ_Write(msg, buf.data, buf.cursize);
            }
      }
      d->currententitynumber = n;

      // remove world message (invalid, and thus a good terminator)
      MSG_WriteShort(msg, 0x8000);
      // write the number of the end entity
      MSG_WriteShort(msg, d->currententitynumber);
      // just to be sure
      d->currentcommit = NULL;

      return true;
}




entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
{
      int i;
      entityframe5_database_t *d;
      d = (entityframe5_database_t *)Mem_Alloc(pool, sizeof(*d));
      d->latestframenum = 0;
      for (i = 0;i < d->maxedicts;i++)
            d->states[i] = defaultstate;
      return d;
}

void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
{
      // all the [maxedicts] memory is allocated at once, so there's only one
      // thing to free
      if (d->maxedicts)
            Mem_Free(d->deltabits);
      Mem_Free(d);
}

static void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
{
      if (d->maxedicts < newmax)
      {
            unsigned char *data;
            int oldmaxedicts = d->maxedicts;
            int *olddeltabits = d->deltabits;
            unsigned char *oldpriorities = d->priorities;
            int *oldupdateframenum = d->updateframenum;
            entity_state_t *oldstates = d->states;
            unsigned char *oldvisiblebits = d->visiblebits;
            d->maxedicts = newmax;
            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));
            d->deltabits = (int *)data;data += d->maxedicts * sizeof(int);
            d->priorities = (unsigned char *)data;data += d->maxedicts * sizeof(unsigned char);
            d->updateframenum = (int *)data;data += d->maxedicts * sizeof(int);
            d->states = (entity_state_t *)data;data += d->maxedicts * sizeof(entity_state_t);
            d->visiblebits = (unsigned char *)data;data += (d->maxedicts+7)/8 * sizeof(unsigned char);
            if (oldmaxedicts)
            {
                  memcpy(d->deltabits, olddeltabits, oldmaxedicts * sizeof(int));
                  memcpy(d->priorities, oldpriorities, oldmaxedicts * sizeof(unsigned char));
                  memcpy(d->updateframenum, oldupdateframenum, oldmaxedicts * sizeof(int));
                  memcpy(d->states, oldstates, oldmaxedicts * sizeof(entity_state_t));
                  memcpy(d->visiblebits, oldvisiblebits, (oldmaxedicts+7)/8 * sizeof(unsigned char));
                  // the previous buffers were a single allocation, so just one free
                  Mem_Free(olddeltabits);
            }
      }
}

static int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
{
      int limit, priority;
      entity_state_t *s = NULL; // hush compiler warning by initializing this
      // if it is the player, update urgently
      if (stateindex == d->viewentnum)
            return ENTITYFRAME5_PRIORITYLEVELS - 1;
      // priority increases each frame no matter what happens
      priority = d->priorities[stateindex] + 1;
      // players get an extra priority boost
      if (stateindex <= svs.maxclients)
            priority++;
      // remove dead entities very quickly because they are just 2 bytes
      if (d->states[stateindex].active != ACTIVE_NETWORK)
      {
            priority++;
            return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
      }
      // certain changes are more noticable than others
      if (d->deltabits[stateindex] & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
            priority++;
      // find the root entity this one is attached to, and judge relevance by it
      for (limit = 0;limit < 256;limit++)
      {
            s = d->states + stateindex;
            if (s->flags & RENDER_VIEWMODEL)
                  stateindex = d->viewentnum;
            else if (s->tagentity)
                  stateindex = s->tagentity;
            else
                  break;
            if (d->maxedicts < stateindex)
                  EntityFrame5_ExpandEdicts(d, (stateindex+256)&~255);
      }
      if (limit >= 256)
            Con_DPrintf("Protocol: Runaway loop recursing tagentity links on entity %i\n", stateindex);
      // now that we have the parent entity we can make some decisions based on
      // distance from the player
      if (VectorDistance(d->states[d->viewentnum].netcenter, s->netcenter) < 1024.0f)
            priority++;
      return bound(1, priority, ENTITYFRAME5_PRIORITYLEVELS - 1);
}

void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
{
      unsigned int bits = 0;
      //dp_model_t *model;
      ENTITYSIZEPROFILING_START(msg, s->number);

      if (s->active != ACTIVE_NETWORK)
            MSG_WriteShort(msg, number | 0x8000);
      else
      {
            if (PRVM_serveredictfunction((&prog->edicts[s->number]), SendEntity))
                  return;

            bits = changedbits;
            if ((bits & E5_ORIGIN) && (!(s->flags & RENDER_LOWPRECISION) || s->exteriormodelforclient || s->tagentity || s->viewmodelforclient || (s->number >= 1 && s->number <= svs.maxclients) || s->origin[0] <= -4096.0625 || s->origin[0] >= 4095.9375 || s->origin[1] <= -4096.0625 || s->origin[1] >= 4095.9375 || s->origin[2] <= -4096.0625 || s->origin[2] >= 4095.9375))
            // maybe also add: ((model = SV_GetModelByIndex(s->modelindex)) != NULL && model->name[0] == '*')
                  bits |= E5_ORIGIN32;
                  // possible values:
                  //   negative origin:
                  //     (int)(f * 8 - 0.5) >= -32768
                  //          (f * 8 - 0.5) >  -32769
                  //           f            >  -4096.0625
                  //   positive origin:
                  //     (int)(f * 8 + 0.5) <=  32767
                  //          (f * 8 + 0.5) <   32768
                  //           f * 8 + 0.5) <   4095.9375
            if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
                  bits |= E5_ANGLES16;
            if ((bits & E5_MODEL) && s->modelindex >= 256)
                  bits |= E5_MODEL16;
            if ((bits & E5_FRAME) && s->frame >= 256)
                  bits |= E5_FRAME16;
            if (bits & E5_EFFECTS)
            {
                  if (s->effects & 0xFFFF0000)
                        bits |= E5_EFFECTS32;
                  else if (s->effects & 0xFFFFFF00)
                        bits |= E5_EFFECTS16;
            }
            if (bits >= 256)
                  bits |= E5_EXTEND1;
            if (bits >= 65536)
                  bits |= E5_EXTEND2;
            if (bits >= 16777216)
                  bits |= E5_EXTEND3;
            MSG_WriteShort(msg, number);
            MSG_WriteByte(msg, bits & 0xFF);
            if (bits & E5_EXTEND1)
                  MSG_WriteByte(msg, (bits >> 8) & 0xFF);
            if (bits & E5_EXTEND2)
                  MSG_WriteByte(msg, (bits >> 16) & 0xFF);
            if (bits & E5_EXTEND3)
                  MSG_WriteByte(msg, (bits >> 24) & 0xFF);
            if (bits & E5_FLAGS)
                  MSG_WriteByte(msg, s->flags);
            if (bits & E5_ORIGIN)
            {
                  if (bits & E5_ORIGIN32)
                  {
                        MSG_WriteCoord32f(msg, s->origin[0]);
                        MSG_WriteCoord32f(msg, s->origin[1]);
                        MSG_WriteCoord32f(msg, s->origin[2]);
                  }
                  else
                  {
                        MSG_WriteCoord13i(msg, s->origin[0]);
                        MSG_WriteCoord13i(msg, s->origin[1]);
                        MSG_WriteCoord13i(msg, s->origin[2]);
                  }
            }
            if (bits & E5_ANGLES)
            {
                  if (bits & E5_ANGLES16)
                  {
                        MSG_WriteAngle16i(msg, s->angles[0]);
                        MSG_WriteAngle16i(msg, s->angles[1]);
                        MSG_WriteAngle16i(msg, s->angles[2]);
                  }
                  else
                  {
                        MSG_WriteAngle8i(msg, s->angles[0]);
                        MSG_WriteAngle8i(msg, s->angles[1]);
                        MSG_WriteAngle8i(msg, s->angles[2]);
                  }
            }
            if (bits & E5_MODEL)
            {
                  if (bits & E5_MODEL16)
                        MSG_WriteShort(msg, s->modelindex);
                  else
                        MSG_WriteByte(msg, s->modelindex);
            }
            if (bits & E5_FRAME)
            {
                  if (bits & E5_FRAME16)
                        MSG_WriteShort(msg, s->frame);
                  else
                        MSG_WriteByte(msg, s->frame);
            }
            if (bits & E5_SKIN)
                  MSG_WriteByte(msg, s->skin);
            if (bits & E5_EFFECTS)
            {
                  if (bits & E5_EFFECTS32)
                        MSG_WriteLong(msg, s->effects);
                  else if (bits & E5_EFFECTS16)
                        MSG_WriteShort(msg, s->effects);
                  else
                        MSG_WriteByte(msg, s->effects);
            }
            if (bits & E5_ALPHA)
                  MSG_WriteByte(msg, s->alpha);
            if (bits & E5_SCALE)
                  MSG_WriteByte(msg, s->scale);
            if (bits & E5_COLORMAP)
                  MSG_WriteByte(msg, s->colormap);
            if (bits & E5_ATTACHMENT)
            {
                  MSG_WriteShort(msg, s->tagentity);
                  MSG_WriteByte(msg, s->tagindex);
            }
            if (bits & E5_LIGHT)
            {
                  MSG_WriteShort(msg, s->light[0]);
                  MSG_WriteShort(msg, s->light[1]);
                  MSG_WriteShort(msg, s->light[2]);
                  MSG_WriteShort(msg, s->light[3]);
                  MSG_WriteByte(msg, s->lightstyle);
                  MSG_WriteByte(msg, s->lightpflags);
            }
            if (bits & E5_GLOW)
            {
                  MSG_WriteByte(msg, s->glowsize);
                  MSG_WriteByte(msg, s->glowcolor);
            }
            if (bits & E5_COLORMOD)
            {
                  MSG_WriteByte(msg, s->colormod[0]);
                  MSG_WriteByte(msg, s->colormod[1]);
                  MSG_WriteByte(msg, s->colormod[2]);
            }
            if (bits & E5_GLOWMOD)
            {
                  MSG_WriteByte(msg, s->glowmod[0]);
                  MSG_WriteByte(msg, s->glowmod[1]);
                  MSG_WriteByte(msg, s->glowmod[2]);
            }
            if (bits & E5_COMPLEXANIMATION)
            {
                  if (s->skeletonobject.model && s->skeletonobject.relativetransforms)
                  {
                        int numbones = s->skeletonobject.model->num_bones;
                        int bonenum;
                        short pose6s[6];
                        MSG_WriteByte(msg, 4);
                        MSG_WriteShort(msg, s->modelindex);
                        MSG_WriteByte(msg, numbones);
                        for (bonenum = 0;bonenum < numbones;bonenum++)
                        {
                              Matrix4x4_ToBonePose6s(s->skeletonobject.relativetransforms + bonenum, 64, pose6s);
                              MSG_WriteShort(msg, pose6s[0]);
                              MSG_WriteShort(msg, pose6s[1]);
                              MSG_WriteShort(msg, pose6s[2]);
                              MSG_WriteShort(msg, pose6s[3]);
                              MSG_WriteShort(msg, pose6s[4]);
                              MSG_WriteShort(msg, pose6s[5]);
                        }
                  }
                  else if (s->framegroupblend[3].lerp > 0)
                  {
                        MSG_WriteByte(msg, 3);
                        MSG_WriteShort(msg, s->framegroupblend[0].frame);
                        MSG_WriteShort(msg, s->framegroupblend[1].frame);
                        MSG_WriteShort(msg, s->framegroupblend[2].frame);
                        MSG_WriteShort(msg, s->framegroupblend[3].frame);
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[0].start) * 1000.0));
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[1].start) * 1000.0));
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[2].start) * 1000.0));
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[3].start) * 1000.0));
                        MSG_WriteByte(msg, s->framegroupblend[0].lerp * 255.0f);
                        MSG_WriteByte(msg, s->framegroupblend[1].lerp * 255.0f);
                        MSG_WriteByte(msg, s->framegroupblend[2].lerp * 255.0f);
                        MSG_WriteByte(msg, s->framegroupblend[3].lerp * 255.0f);
                  }
                  else if (s->framegroupblend[2].lerp > 0)
                  {
                        MSG_WriteByte(msg, 2);
                        MSG_WriteShort(msg, s->framegroupblend[0].frame);
                        MSG_WriteShort(msg, s->framegroupblend[1].frame);
                        MSG_WriteShort(msg, s->framegroupblend[2].frame);
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[0].start) * 1000.0));
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[1].start) * 1000.0));
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[2].start) * 1000.0));
                        MSG_WriteByte(msg, s->framegroupblend[0].lerp * 255.0f);
                        MSG_WriteByte(msg, s->framegroupblend[1].lerp * 255.0f);
                        MSG_WriteByte(msg, s->framegroupblend[2].lerp * 255.0f);
                  }
                  else if (s->framegroupblend[1].lerp > 0)
                  {
                        MSG_WriteByte(msg, 1);
                        MSG_WriteShort(msg, s->framegroupblend[0].frame);
                        MSG_WriteShort(msg, s->framegroupblend[1].frame);
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[0].start) * 1000.0));
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[1].start) * 1000.0));
                        MSG_WriteByte(msg, s->framegroupblend[0].lerp * 255.0f);
                        MSG_WriteByte(msg, s->framegroupblend[1].lerp * 255.0f);
                  }
                  else
                  {
                        MSG_WriteByte(msg, 0);
                        MSG_WriteShort(msg, s->framegroupblend[0].frame);
                        MSG_WriteShort(msg, (int)((sv.time - s->framegroupblend[0].start) * 1000.0));
                  }
            }
            if (bits & E5_TRAILEFFECTNUM)
                  MSG_WriteShort(msg, s->traileffectnum);
      }

      ENTITYSIZEPROFILING_END(msg, s->number);
}

extern dp_model_t *CL_GetModelByIndex(int modelindex);

static void EntityState5_ReadUpdate(entity_state_t *s, int number)
{
      int bits;
      bits = MSG_ReadByte();
      if (bits & E5_EXTEND1)
      {
            bits |= MSG_ReadByte() << 8;
            if (bits & E5_EXTEND2)
            {
                  bits |= MSG_ReadByte() << 16;
                  if (bits & E5_EXTEND3)
                        bits |= MSG_ReadByte() << 24;
            }
      }
      if (bits & E5_FULLUPDATE)
      {
            *s = defaultstate;
            s->active = ACTIVE_NETWORK;
      }
      if (bits & E5_FLAGS)
            s->flags = MSG_ReadByte();
      if (bits & E5_ORIGIN)
      {
            if (bits & E5_ORIGIN32)
            {
                  s->origin[0] = MSG_ReadCoord32f();
                  s->origin[1] = MSG_ReadCoord32f();
                  s->origin[2] = MSG_ReadCoord32f();
            }
            else
            {
                  s->origin[0] = MSG_ReadCoord13i();
                  s->origin[1] = MSG_ReadCoord13i();
                  s->origin[2] = MSG_ReadCoord13i();
            }
      }
      if (bits & E5_ANGLES)
      {
            if (bits & E5_ANGLES16)
            {
                  s->angles[0] = MSG_ReadAngle16i();
                  s->angles[1] = MSG_ReadAngle16i();
                  s->angles[2] = MSG_ReadAngle16i();
            }
            else
            {
                  s->angles[0] = MSG_ReadAngle8i();
                  s->angles[1] = MSG_ReadAngle8i();
                  s->angles[2] = MSG_ReadAngle8i();
            }
      }
      if (bits & E5_MODEL)
      {
            if (bits & E5_MODEL16)
                  s->modelindex = (unsigned short) MSG_ReadShort();
            else
                  s->modelindex = MSG_ReadByte();
      }
      if (bits & E5_FRAME)
      {
            if (bits & E5_FRAME16)
                  s->frame = (unsigned short) MSG_ReadShort();
            else
                  s->frame = MSG_ReadByte();
      }
      if (bits & E5_SKIN)
            s->skin = MSG_ReadByte();
      if (bits & E5_EFFECTS)
      {
            if (bits & E5_EFFECTS32)
                  s->effects = (unsigned int) MSG_ReadLong();
            else if (bits & E5_EFFECTS16)
                  s->effects = (unsigned short) MSG_ReadShort();
            else
                  s->effects = MSG_ReadByte();
      }
      if (bits & E5_ALPHA)
            s->alpha = MSG_ReadByte();
      if (bits & E5_SCALE)
            s->scale = MSG_ReadByte();
      if (bits & E5_COLORMAP)
            s->colormap = MSG_ReadByte();
      if (bits & E5_ATTACHMENT)
      {
            s->tagentity = (unsigned short) MSG_ReadShort();
            s->tagindex = MSG_ReadByte();
      }
      if (bits & E5_LIGHT)
      {
            s->light[0] = (unsigned short) MSG_ReadShort();
            s->light[1] = (unsigned short) MSG_ReadShort();
            s->light[2] = (unsigned short) MSG_ReadShort();
            s->light[3] = (unsigned short) MSG_ReadShort();
            s->lightstyle = MSG_ReadByte();
            s->lightpflags = MSG_ReadByte();
      }
      if (bits & E5_GLOW)
      {
            s->glowsize = MSG_ReadByte();
            s->glowcolor = MSG_ReadByte();
      }
      if (bits & E5_COLORMOD)
      {
            s->colormod[0] = MSG_ReadByte();
            s->colormod[1] = MSG_ReadByte();
            s->colormod[2] = MSG_ReadByte();
      }
      if (bits & E5_GLOWMOD)
      {
            s->glowmod[0] = MSG_ReadByte();
            s->glowmod[1] = MSG_ReadByte();
            s->glowmod[2] = MSG_ReadByte();
      }
      if (bits & E5_COMPLEXANIMATION)
      {
            skeleton_t *skeleton;
            const dp_model_t *model;
            int modelindex;
            int type;
            int bonenum;
            int numbones;
            short pose6s[6];
            type = MSG_ReadByte();
            switch(type)
            {
            case 0:
                  s->framegroupblend[0].frame = MSG_ReadShort();
                  s->framegroupblend[1].frame = 0;
                  s->framegroupblend[2].frame = 0;
                  s->framegroupblend[3].frame = 0;
                  s->framegroupblend[0].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[1].start = 0;
                  s->framegroupblend[2].start = 0;
                  s->framegroupblend[3].start = 0;
                  s->framegroupblend[0].lerp = 1;
                  s->framegroupblend[1].lerp = 0;
                  s->framegroupblend[2].lerp = 0;
                  s->framegroupblend[3].lerp = 0;
                  break;
            case 1:
                  s->framegroupblend[0].frame = MSG_ReadShort();
                  s->framegroupblend[1].frame = MSG_ReadShort();
                  s->framegroupblend[2].frame = 0;
                  s->framegroupblend[3].frame = 0;
                  s->framegroupblend[0].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[1].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[2].start = 0;
                  s->framegroupblend[3].start = 0;
                  s->framegroupblend[0].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[1].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[2].lerp = 0;
                  s->framegroupblend[3].lerp = 0;
                  break;
            case 2:
                  s->framegroupblend[0].frame = MSG_ReadShort();
                  s->framegroupblend[1].frame = MSG_ReadShort();
                  s->framegroupblend[2].frame = MSG_ReadShort();
                  s->framegroupblend[3].frame = 0;
                  s->framegroupblend[0].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[1].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[2].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[3].start = 0;
                  s->framegroupblend[0].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[1].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[2].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[3].lerp = 0;
                  break;
            case 3:
                  s->framegroupblend[0].frame = MSG_ReadShort();
                  s->framegroupblend[1].frame = MSG_ReadShort();
                  s->framegroupblend[2].frame = MSG_ReadShort();
                  s->framegroupblend[3].frame = MSG_ReadShort();
                  s->framegroupblend[0].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[1].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[2].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[3].start = cl.time - (short)MSG_ReadShort() * (1.0f / 1000.0f);
                  s->framegroupblend[0].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[1].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[2].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  s->framegroupblend[3].lerp = MSG_ReadByte() * (1.0f / 255.0f);
                  break;
            case 4:
                  if (!cl.engineskeletonobjects)
                        cl.engineskeletonobjects = (skeleton_t *) Mem_Alloc(cls.levelmempool, sizeof(*cl.engineskeletonobjects) * MAX_EDICTS);
                  skeleton = &cl.engineskeletonobjects[number];
                  modelindex = MSG_ReadShort();
                  model = CL_GetModelByIndex(modelindex);
                  numbones = MSG_ReadByte();
                  if (model && numbones != model->num_bones)
                        Host_Error("E5_COMPLEXANIMATION: model has different number of bones than network packet describes\n");
                  if (!skeleton->relativetransforms || skeleton->model != model)
                  {
                        skeleton->model = model;
                        skeleton->relativetransforms = (matrix4x4_t *) Mem_Realloc(cls.levelmempool, skeleton->relativetransforms, sizeof(*skeleton->relativetransforms) * skeleton->model->num_bones);
                        for (bonenum = 0;bonenum < model->num_bones;bonenum++)
                              skeleton->relativetransforms[bonenum] = identitymatrix;
                  }
                  for (bonenum = 0;bonenum < numbones;bonenum++)
                  {
                        pose6s[0] = (short)MSG_ReadShort();
                        pose6s[1] = (short)MSG_ReadShort();
                        pose6s[2] = (short)MSG_ReadShort();
                        pose6s[3] = (short)MSG_ReadShort();
                        pose6s[4] = (short)MSG_ReadShort();
                        pose6s[5] = (short)MSG_ReadShort();
                        Matrix4x4_FromBonePose6s(skeleton->relativetransforms + bonenum, 1.0f / 64.0f, pose6s);
                  }
                  s->skeletonobject = *skeleton;
                  break;
            default:
                  Host_Error("E5_COMPLEXANIMATION: Parse error - unknown type %i\n", type);
                  break;
            }
      }
      if (bits & E5_TRAILEFFECTNUM)
            s->traileffectnum = (unsigned short) MSG_ReadShort();


      if (developer_networkentities.integer >= 2)
      {
            Con_Printf("ReadFields e%i", number);

            if (bits & E5_ORIGIN)
                  Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
            if (bits & E5_ANGLES)
                  Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
            if (bits & E5_MODEL)
                  Con_Printf(" E5_MODEL %i", s->modelindex);
            if (bits & E5_FRAME)
                  Con_Printf(" E5_FRAME %i", s->frame);
            if (bits & E5_SKIN)
                  Con_Printf(" E5_SKIN %i", s->skin);
            if (bits & E5_EFFECTS)
                  Con_Printf(" E5_EFFECTS %i", s->effects);
            if (bits & E5_FLAGS)
            {
                  Con_Printf(" E5_FLAGS %i (", s->flags);
                  if (s->flags & RENDER_STEP)
                        Con_Print(" STEP");
                  if (s->flags & RENDER_GLOWTRAIL)
                        Con_Print(" GLOWTRAIL");
                  if (s->flags & RENDER_VIEWMODEL)
                        Con_Print(" VIEWMODEL");
                  if (s->flags & RENDER_EXTERIORMODEL)
                        Con_Print(" EXTERIORMODEL");
                  if (s->flags & RENDER_LOWPRECISION)
                        Con_Print(" LOWPRECISION");
                  if (s->flags & RENDER_COLORMAPPED)
                        Con_Print(" COLORMAPPED");
                  if (s->flags & RENDER_SHADOW)
                        Con_Print(" SHADOW");
                  if (s->flags & RENDER_LIGHT)
                        Con_Print(" LIGHT");
                  if (s->flags & RENDER_NOSELFSHADOW)
                        Con_Print(" NOSELFSHADOW");
                  Con_Print(")");
            }
            if (bits & E5_ALPHA)
                  Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
            if (bits & E5_SCALE)
                  Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
            if (bits & E5_COLORMAP)
                  Con_Printf(" E5_COLORMAP %i", s->colormap);
            if (bits & E5_ATTACHMENT)
                  Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
            if (bits & E5_LIGHT)
                  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);
            if (bits & E5_GLOW)
                  Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
            if (bits & E5_COLORMOD)
                  Con_Printf(" E5_COLORMOD %f:%f:%f", s->colormod[0] / 32.0f, s->colormod[1] / 32.0f, s->colormod[2] / 32.0f);
            if (bits & E5_GLOWMOD)
                  Con_Printf(" E5_GLOWMOD %f:%f:%f", s->glowmod[0] / 32.0f, s->glowmod[1] / 32.0f, s->glowmod[2] / 32.0f);
            Con_Print("\n");
      }
}

static int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
{
      unsigned int bits = 0;
      if (n->active == ACTIVE_NETWORK)
      {
            if (o->active != ACTIVE_NETWORK)
                  bits |= E5_FULLUPDATE;
            if (!VectorCompare(o->origin, n->origin))
                  bits |= E5_ORIGIN;
            if (!VectorCompare(o->angles, n->angles))
                  bits |= E5_ANGLES;
            if (o->modelindex != n->modelindex)
                  bits |= E5_MODEL;
            if (o->frame != n->frame)
                  bits |= E5_FRAME;
            if (o->skin != n->skin)
                  bits |= E5_SKIN;
            if (o->effects != n->effects)
                  bits |= E5_EFFECTS;
            if (o->flags != n->flags)
                  bits |= E5_FLAGS;
            if (o->alpha != n->alpha)
                  bits |= E5_ALPHA;
            if (o->scale != n->scale)
                  bits |= E5_SCALE;
            if (o->colormap != n->colormap)
                  bits |= E5_COLORMAP;
            if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
                  bits |= E5_ATTACHMENT;
            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)
                  bits |= E5_LIGHT;
            if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
                  bits |= E5_GLOW;
            if (o->colormod[0] != n->colormod[0] || o->colormod[1] != n->colormod[1] || o->colormod[2] != n->colormod[2])
                  bits |= E5_COLORMOD;
            if (o->glowmod[0] != n->glowmod[0] || o->glowmod[1] != n->glowmod[1] || o->glowmod[2] != n->glowmod[2])
                  bits |= E5_GLOWMOD;
            if (n->flags & RENDER_COMPLEXANIMATION)
                  bits |= E5_COMPLEXANIMATION;
            if (o->traileffectnum != n->traileffectnum)
                  bits |= E5_TRAILEFFECTNUM;
      }
      else
            if (o->active == ACTIVE_NETWORK)
                  bits |= E5_FULLUPDATE;
      return bits;
}

void EntityFrame5_CL_ReadFrame(void)
{
      int n, enumber, framenum;
      entity_t *ent;
      entity_state_t *s;
      // read the number of this frame to echo back in next input packet
      framenum = MSG_ReadLong();
      CL_NewFrameReceived(framenum);
      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)
            cls.servermovesequence = MSG_ReadLong();
      // read entity numbers until we find a 0x8000
      // (which would be remove world entity, but is actually a terminator)
      while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
      {
            // get the entity number
            enumber = n & 0x7FFF;
            // we may need to expand the array
            if (cl.num_entities <= enumber)
            {
                  cl.num_entities = enumber + 1;
                  if (enumber >= cl.max_entities)
                        CL_ExpandEntities(enumber);
            }
            // look up the entity
            ent = cl.entities + enumber;
            // slide the current into the previous slot
            ent->state_previous = ent->state_current;
            // read the update
            s = &ent->state_current;
            if (n & 0x8000)
            {
                  // remove entity
                  *s = defaultstate;
            }
            else
            {
                  // update entity
                  EntityState5_ReadUpdate(s, enumber);
            }
            // set the cl.entities_active flag
            cl.entities_active[enumber] = (s->active == ACTIVE_NETWORK);
            // set the update time
            s->time = cl.mtime[0];
            // fix the number (it gets wiped occasionally by copying from defaultstate)
            s->number = enumber;
            // check if we need to update the lerp stuff
            if (s->active == ACTIVE_NETWORK)
                  CL_MoveLerpEntityStates(&cl.entities[enumber]);
            // print extra messages if desired
            if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
            {
                  if (cl.entities[enumber].state_current.active == ACTIVE_NETWORK)
                        Con_Printf("entity #%i has become active\n", enumber);
                  else if (cl.entities[enumber].state_previous.active)
                        Con_Printf("entity #%i has become inactive\n", enumber);
            }
      }
}

static int packetlog5cmp(const void *a_, const void *b_)
{
      const entityframe5_packetlog_t *a = (const entityframe5_packetlog_t *) a_;
      const entityframe5_packetlog_t *b = (const entityframe5_packetlog_t *) b_;
      return a->packetnumber - b->packetnumber;
}

void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum)
{
      int i, j, l, bits;
      entityframe5_changestate_t *s;
      entityframe5_packetlog_t *p;
      static unsigned char statsdeltabits[(MAX_CL_STATS+7)/8];
      static int deltabits[MAX_EDICTS];
      entityframe5_packetlog_t *packetlogs[ENTITYFRAME5_MAXPACKETLOGS];

      for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
            packetlogs[i] = p;
      qsort(packetlogs, sizeof(*packetlogs), ENTITYFRAME5_MAXPACKETLOGS, packetlog5cmp);

      memset(deltabits, 0, sizeof(deltabits));
      memset(statsdeltabits, 0, sizeof(statsdeltabits));
      for (i = 0; i < ENTITYFRAME5_MAXPACKETLOGS; i++)
      {
            p = packetlogs[i];

            if (!p->packetnumber)
                  continue;

            if (p->packetnumber <= framenum)
            {
                  for (j = 0, s = p->states;j < p->numstates;j++, s++)
                        deltabits[s->number] |= s->bits;

                  for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
                        statsdeltabits[l] |= p->statsdeltabits[l];

                  p->packetnumber = 0;
            }
            else
            {
                  for (j = 0, s = p->states;j < p->numstates;j++, s++)
                        deltabits[s->number] &= ~s->bits;
                  for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
                        statsdeltabits[l] &= ~p->statsdeltabits[l];
            }
      }

      for(i = 0; i < d->maxedicts; ++i)
      {
            bits = deltabits[i] & ~d->deltabits[i];
            if(bits)
            {
                  d->deltabits[i] |= bits;
                  // if it was a very important update, set priority higher
                  if (bits & (E5_FULLUPDATE | E5_ATTACHMENT | E5_MODEL | E5_COLORMAP))
                        d->priorities[i] = max(d->priorities[i], 4);
                  else
                        d->priorities[i] = max(d->priorities[i], 1);
            }
      }

      for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
            host_client->statsdeltabits[l] |= statsdeltabits[l];
            // no need to mask out the already-set bits here, as we do not
            // do that priorities stuff
}

void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
{
      int i;
      // scan for packets made obsolete by this ack and delete them
      for (i = 0;i < ENTITYFRAME5_MAXPACKETLOGS;i++)
            if (d->packetlog[i].packetnumber <= framenum)
                  d->packetlog[i].packetnumber = 0;
}

qboolean EntityFrame5_WriteFrame(sizebuf_t *msg, int maxsize, entityframe5_database_t *d, int numstates, const entity_state_t **states, int viewentnum, int movesequence, qboolean need_empty)
{
      const entity_state_t *n;
      int i, num, l, framenum, packetlognumber, priority;
      sizebuf_t buf;
      unsigned char data[128];
      entityframe5_packetlog_t *packetlog;

      if (prog->max_edicts > d->maxedicts)
            EntityFrame5_ExpandEdicts(d, prog->max_edicts);

      framenum = d->latestframenum + 1;
      d->viewentnum = viewentnum;

      // if packet log is full, mark all frames as lost, this will cause
      // it to send the lost data again
      for (packetlognumber = 0;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++)
            if (d->packetlog[packetlognumber].packetnumber == 0)
                  break;
      if (packetlognumber == ENTITYFRAME5_MAXPACKETLOGS)
      {
            Con_DPrintf("EntityFrame5_WriteFrame: packetlog overflow for a client, resetting\n");
            EntityFrame5_LostFrame(d, framenum);
            packetlognumber = 0;
      }

      // prepare the buffer
      memset(&buf, 0, sizeof(buf));
      buf.data = data;
      buf.maxsize = sizeof(data);

      // detect changes in states
      num = 1;
      for (i = 0;i < numstates;i++)
      {
            n = states[i];
            // mark gaps in entity numbering as removed entities
            for (;num < n->number;num++)
            {
                  // if the entity used to exist, clear it
                  if (CHECKPVSBIT(d->visiblebits, num))
                  {
                        CLEARPVSBIT(d->visiblebits, num);
                        d->deltabits[num] = E5_FULLUPDATE;
                        d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
                        d->states[num] = defaultstate;
                        d->states[num].number = num;
                  }
            }
            // update the entity state data
            if (!CHECKPVSBIT(d->visiblebits, num))
            {
                  // entity just spawned in, don't let it completely hog priority
                  // because of being ancient on the first frame
                  d->updateframenum[num] = framenum;
                  // initial priority is a bit high to make projectiles send on the
                  // first frame, among other things
                  d->priorities[num] = max(d->priorities[num], 4);
            }
            SETPVSBIT(d->visiblebits, num);
            d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
            d->priorities[num] = max(d->priorities[num], 1);
            d->states[num] = *n;
            d->states[num].number = num;
            // advance to next entity so the next iteration doesn't immediately remove it
            num++;
      }
      // all remaining entities are dead
      for (;num < d->maxedicts;num++)
      {
            if (CHECKPVSBIT(d->visiblebits, num))
            {
                  CLEARPVSBIT(d->visiblebits, num);
                  d->deltabits[num] = E5_FULLUPDATE;
                  d->priorities[num] = max(d->priorities[num], 8); // removal is cheap
                  d->states[num] = defaultstate;
                  d->states[num].number = num;
            }
      }

      // if there isn't at least enough room for an empty svc_entities,
      // don't bother trying...
      if (buf.cursize + 11 > buf.maxsize)
            return false;

      // build lists of entities by priority level
      memset(d->prioritychaincounts, 0, sizeof(d->prioritychaincounts));
      l = 0;
      for (num = 0;num < d->maxedicts;num++)
      {
            if (d->priorities[num])
            {
                  if (d->deltabits[num])
                  {
                        if (d->priorities[num] < (ENTITYFRAME5_PRIORITYLEVELS - 1))
                              d->priorities[num] = EntityState5_Priority(d, num);
                        l = num;
                        priority = d->priorities[num];
                        if (d->prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
                              d->prioritychains[priority][d->prioritychaincounts[priority]++] = num;
                  }
                  else
                        d->priorities[num] = 0;
            }
      }

      packetlog = NULL;
      // write stat updates
      if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_NEHAHRABJP && sv.protocol != PROTOCOL_NEHAHRABJP2 && sv.protocol != PROTOCOL_NEHAHRABJP3 && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5)
      {
            for (i = 0;i < MAX_CL_STATS && msg->cursize + 6 + 11 <= maxsize;i++)
            {
                  if (host_client->statsdeltabits[i>>3] & (1<<(i&7)))
                  {
                        host_client->statsdeltabits[i>>3] &= ~(1<<(i&7));
                        // add packetlog entry now that we have something for it
                        if (!packetlog)
                        {
                              packetlog = d->packetlog + packetlognumber;
                              packetlog->packetnumber = framenum;
                              packetlog->numstates = 0;
                              memset(packetlog->statsdeltabits, 0, sizeof(packetlog->statsdeltabits));
                        }
                        packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
                        if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
                        {
                              MSG_WriteByte(msg, svc_updatestatubyte);
                              MSG_WriteByte(msg, i);
                              MSG_WriteByte(msg, host_client->stats[i]);
                              l = 1;
                        }
                        else
                        {
                              MSG_WriteByte(msg, svc_updatestat);
                              MSG_WriteByte(msg, i);
                              MSG_WriteLong(msg, host_client->stats[i]);
                              l = 1;
                        }
                  }
            }
      }

      // only send empty svc_entities frame if needed
      if(!l && !need_empty)
            return false;

      // add packetlog entry now that we have something for it
      if (!packetlog)
      {
            packetlog = d->packetlog + packetlognumber;
            packetlog->packetnumber = framenum;
            packetlog->numstates = 0;
            memset(packetlog->statsdeltabits, 0, sizeof(packetlog->statsdeltabits));
      }

      // write state updates
      if (developer_networkentities.integer >= 10)
            Con_Printf("send: svc_entities %i\n", framenum);
      d->latestframenum = framenum;
      MSG_WriteByte(msg, svc_entities);
      MSG_WriteLong(msg, framenum);
      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)
            MSG_WriteLong(msg, movesequence);
      for (priority = ENTITYFRAME5_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
      {
            for (i = 0;i < d->prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
            {
                  num = d->prioritychains[priority][i];
                  n = d->states + num;
                  if (d->deltabits[num] & E5_FULLUPDATE)
                        d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
                  buf.cursize = 0;
                  EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
                  // if the entity won't fit, try the next one
                  if (msg->cursize + buf.cursize + 2 > maxsize)
                        continue;
                  // write entity to the packet
                  SZ_Write(msg, buf.data, buf.cursize);
                  // mark age on entity for prioritization
                  d->updateframenum[num] = framenum;
                  // log entity so deltabits can be restored later if lost
                  packetlog->states[packetlog->numstates].number = num;
                  packetlog->states[packetlog->numstates].bits = d->deltabits[num];
                  packetlog->numstates++;
                  // clear deltabits and priority so it won't be sent again
                  d->deltabits[num] = 0;
                  d->priorities[num] = 0;
            }
      }
      MSG_WriteShort(msg, 0x8000);

      return true;
}


static void QW_TranslateEffects(entity_state_t *s, int qweffects)
{
      s->effects = 0;
      s->internaleffects = 0;
      if (qweffects & QW_EF_BRIGHTFIELD)
            s->effects |= EF_BRIGHTFIELD;
      if (qweffects & QW_EF_MUZZLEFLASH)
            s->effects |= EF_MUZZLEFLASH;
      if (qweffects & QW_EF_FLAG1)
      {
            // mimic FTEQW's interpretation of EF_FLAG1 as EF_NODRAW on non-player entities
            if (s->number > cl.maxclients)
                  s->effects |= EF_NODRAW;
            else
                  s->internaleffects |= INTEF_FLAG1QW;
      }
      if (qweffects & QW_EF_FLAG2)
      {
            // mimic FTEQW's interpretation of EF_FLAG2 as EF_ADDITIVE on non-player entities
            if (s->number > cl.maxclients)
                  s->effects |= EF_ADDITIVE;
            else
                  s->internaleffects |= INTEF_FLAG2QW;
      }
      if (qweffects & QW_EF_RED)
      {
            if (qweffects & QW_EF_BLUE)
                  s->effects |= EF_RED | EF_BLUE;
            else
                  s->effects |= EF_RED;
      }
      else if (qweffects & QW_EF_BLUE)
            s->effects |= EF_BLUE;
      else if (qweffects & QW_EF_BRIGHTLIGHT)
            s->effects |= EF_BRIGHTLIGHT;
      else if (qweffects & QW_EF_DIMLIGHT)
            s->effects |= EF_DIMLIGHT;
}

void EntityStateQW_ReadPlayerUpdate(void)
{
      int slot = MSG_ReadByte();
      int enumber = slot + 1;
      int weaponframe;
      int msec;
      int playerflags;
      int bits;
      entity_state_t *s;
      // look up the entity
      entity_t *ent = cl.entities + enumber;
      vec3_t viewangles;
      vec3_t velocity;

      // slide the current state into the previous
      ent->state_previous = ent->state_current;

      // read the update
      s = &ent->state_current;
      *s = defaultstate;
      s->active = ACTIVE_NETWORK;
      s->number = enumber;
      s->colormap = enumber;
      playerflags = MSG_ReadShort();
      MSG_ReadVector(s->origin, cls.protocol);
      s->frame = MSG_ReadByte();

      VectorClear(viewangles);
      VectorClear(velocity);

      if (playerflags & QW_PF_MSEC)
      {
            // time difference between last update this player sent to the server,
            // and last input we sent to the server (this packet is in response to
            // our input, so msec is how long ago the last update of this player
            // entity occurred, compared to our input being received)
            msec = MSG_ReadByte();
      }
      else
            msec = 0;
      if (playerflags & QW_PF_COMMAND)
      {
            bits = MSG_ReadByte();
            if (bits & QW_CM_ANGLE1)
                  viewangles[0] = MSG_ReadAngle16i(); // cmd->angles[0]
            if (bits & QW_CM_ANGLE2)
                  viewangles[1] = MSG_ReadAngle16i(); // cmd->angles[1]
            if (bits & QW_CM_ANGLE3)
                  viewangles[2] = MSG_ReadAngle16i(); // cmd->angles[2]
            if (bits & QW_CM_FORWARD)
                  MSG_ReadShort(); // cmd->forwardmove
            if (bits & QW_CM_SIDE)
                  MSG_ReadShort(); // cmd->sidemove
            if (bits & QW_CM_UP)
                  MSG_ReadShort(); // cmd->upmove
            if (bits & QW_CM_BUTTONS)
                  (void) MSG_ReadByte(); // cmd->buttons
            if (bits & QW_CM_IMPULSE)
                  (void) MSG_ReadByte(); // cmd->impulse
            (void) MSG_ReadByte(); // cmd->msec
      }
      if (playerflags & QW_PF_VELOCITY1)
            velocity[0] = MSG_ReadShort();
      if (playerflags & QW_PF_VELOCITY2)
            velocity[1] = MSG_ReadShort();
      if (playerflags & QW_PF_VELOCITY3)
            velocity[2] = MSG_ReadShort();
      if (playerflags & QW_PF_MODEL)
            s->modelindex = MSG_ReadByte();
      else
            s->modelindex = cl.qw_modelindex_player;
      if (playerflags & QW_PF_SKINNUM)
            s->skin = MSG_ReadByte();
      if (playerflags & QW_PF_EFFECTS)
            QW_TranslateEffects(s, MSG_ReadByte());
      if (playerflags & QW_PF_WEAPONFRAME)
            weaponframe = MSG_ReadByte();
      else
            weaponframe = 0;

      if (enumber == cl.playerentity)
      {
            // if this is an update on our player, update the angles
            VectorCopy(cl.viewangles, viewangles);
      }

      // calculate the entity angles from the viewangles
      s->angles[0] = viewangles[0] * -0.0333;
      s->angles[1] = viewangles[1];
      s->angles[2] = 0;
      s->angles[2] = V_CalcRoll(s->angles, velocity)*4;

      // if this is an update on our player, update interpolation state
      if (enumber == cl.playerentity)
      {
            VectorCopy (cl.mpunchangle[0], cl.mpunchangle[1]);
            VectorCopy (cl.mpunchvector[0], cl.mpunchvector[1]);
            VectorCopy (cl.mvelocity[0], cl.mvelocity[1]);
            cl.mviewzoom[1] = cl.mviewzoom[0];

            cl.idealpitch = 0;
            cl.mpunchangle[0][0] = 0;
            cl.mpunchangle[0][1] = 0;
            cl.mpunchangle[0][2] = 0;
            cl.mpunchvector[0][0] = 0;
            cl.mpunchvector[0][1] = 0;
            cl.mpunchvector[0][2] = 0;
            cl.mvelocity[0][0] = 0;
            cl.mvelocity[0][1] = 0;
            cl.mvelocity[0][2] = 0;
            cl.mviewzoom[0] = 1;

            VectorCopy(velocity, cl.mvelocity[0]);
            cl.stats[STAT_WEAPONFRAME] = weaponframe;
            if (playerflags & QW_PF_GIB)
                  cl.stats[STAT_VIEWHEIGHT] = 8;
            else if (playerflags & QW_PF_DEAD)
                  cl.stats[STAT_VIEWHEIGHT] = -16;
            else
                  cl.stats[STAT_VIEWHEIGHT] = 22;
      }

      // set the cl.entities_active flag
      cl.entities_active[enumber] = (s->active == ACTIVE_NETWORK);
      // set the update time
      s->time = cl.mtime[0] - msec * 0.001; // qw has no clock
      // check if we need to update the lerp stuff
      if (s->active == ACTIVE_NETWORK)
            CL_MoveLerpEntityStates(&cl.entities[enumber]);
}

static void EntityStateQW_ReadEntityUpdate(entity_state_t *s, int bits)
{
      int qweffects = 0;
      s->active = ACTIVE_NETWORK;
      s->number = bits & 511;
      bits &= ~511;
      if (bits & QW_U_MOREBITS)
            bits |= MSG_ReadByte();

      // store the QW_U_SOLID bit here?

      if (bits & QW_U_MODEL)
            s->modelindex = MSG_ReadByte();
      if (bits & QW_U_FRAME)
            s->frame = MSG_ReadByte();
      if (bits & QW_U_COLORMAP)
            s->colormap = MSG_ReadByte();
      if (bits & QW_U_SKIN)
            s->skin = MSG_ReadByte();
      if (bits & QW_U_EFFECTS)
            QW_TranslateEffects(s, qweffects = MSG_ReadByte());
      if (bits & QW_U_ORIGIN1)
            s->origin[0] = MSG_ReadCoord13i();
      if (bits & QW_U_ANGLE1)
            s->angles[0] = MSG_ReadAngle8i();
      if (bits & QW_U_ORIGIN2)
            s->origin[1] = MSG_ReadCoord13i();
      if (bits & QW_U_ANGLE2)
            s->angles[1] = MSG_ReadAngle8i();
      if (bits & QW_U_ORIGIN3)
            s->origin[2] = MSG_ReadCoord13i();
      if (bits & QW_U_ANGLE3)
            s->angles[2] = MSG_ReadAngle8i();

      if (developer_networkentities.integer >= 2)
      {
            Con_Printf("ReadFields e%i", s->number);
            if (bits & QW_U_MODEL)
                  Con_Printf(" U_MODEL %i", s->modelindex);
            if (bits & QW_U_FRAME)
                  Con_Printf(" U_FRAME %i", s->frame);
            if (bits & QW_U_COLORMAP)
                  Con_Printf(" U_COLORMAP %i", s->colormap);
            if (bits & QW_U_SKIN)
                  Con_Printf(" U_SKIN %i", s->skin);
            if (bits & QW_U_EFFECTS)
                  Con_Printf(" U_EFFECTS %i", qweffects);
            if (bits & QW_U_ORIGIN1)
                  Con_Printf(" U_ORIGIN1 %f", s->origin[0]);
            if (bits & QW_U_ANGLE1)
                  Con_Printf(" U_ANGLE1 %f", s->angles[0]);
            if (bits & QW_U_ORIGIN2)
                  Con_Printf(" U_ORIGIN2 %f", s->origin[1]);
            if (bits & QW_U_ANGLE2)
                  Con_Printf(" U_ANGLE2 %f", s->angles[1]);
            if (bits & QW_U_ORIGIN3)
                  Con_Printf(" U_ORIGIN3 %f", s->origin[2]);
            if (bits & QW_U_ANGLE3)
                  Con_Printf(" U_ANGLE3 %f", s->angles[2]);
            if (bits & QW_U_SOLID)
                  Con_Printf(" U_SOLID");
            Con_Print("\n");
      }
}

entityframeqw_database_t *EntityFrameQW_AllocDatabase(mempool_t *pool)
{
      entityframeqw_database_t *d;
      d = (entityframeqw_database_t *)Mem_Alloc(pool, sizeof(*d));
      return d;
}

void EntityFrameQW_FreeDatabase(entityframeqw_database_t *d)
{
      Mem_Free(d);
}

void EntityFrameQW_CL_ReadFrame(qboolean delta)
{
      qboolean invalid = false;
      int number, oldsnapindex, newsnapindex, oldindex, newindex, oldnum, newnum;
      entity_t *ent;
      entityframeqw_database_t *d;
      entityframeqw_snapshot_t *oldsnap, *newsnap;

      if (!cl.entitydatabaseqw)
            cl.entitydatabaseqw = EntityFrameQW_AllocDatabase(cls.levelmempool);
      d = cl.entitydatabaseqw;

      // there is no cls.netcon in demos, so this reading code can't access
      // cls.netcon-> at all...  so cls.qw_incoming_sequence and
      // cls.qw_outgoing_sequence are updated every time the corresponding
      // cls.netcon->qw. variables are updated
      // read the number of this frame to echo back in next input packet
      cl.qw_validsequence = cls.qw_incoming_sequence;
      newsnapindex = cl.qw_validsequence & QW_UPDATE_MASK;
      newsnap = d->snapshot + newsnapindex;
      memset(newsnap, 0, sizeof(*newsnap));
      oldsnapindex = -1;
      oldsnap = NULL;
      if (delta)
      {
            number = MSG_ReadByte();
            oldsnapindex = cl.qw_deltasequence[newsnapindex];
            if ((number & QW_UPDATE_MASK) != (oldsnapindex & QW_UPDATE_MASK))
                  Con_DPrintf("WARNING: from mismatch\n");
            if (oldsnapindex != -1)
            {
                  if (cls.qw_outgoing_sequence - oldsnapindex >= QW_UPDATE_BACKUP-1)
                  {
                        Con_DPrintf("delta update too old\n");
                        newsnap->invalid = invalid = true; // too old
                        delta = false;
                  }
                  oldsnap = d->snapshot + (oldsnapindex & QW_UPDATE_MASK);
            }
            else
                  delta = false;
      }

      // if we can't decode this frame properly, report that to the server
      if (invalid)
            cl.qw_validsequence = 0;

      // read entity numbers until we find a 0x0000
      // (which would be an empty update on world entity, but is actually a terminator)
      newsnap->num_entities = 0;
      oldindex = 0;
      for (;;)
      {
            int word = (unsigned short)MSG_ReadShort();
            if (msg_badread)
                  return; // just return, the main parser will print an error
            newnum = word == 0 ? 512 : (word & 511);
            oldnum = delta ? (oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number) : 9999;

            // copy unmodified oldsnap entities
            while (newnum > oldnum) // delta only
            {
                  if (developer_networkentities.integer >= 2)
                        Con_Printf("copy %i\n", oldnum);
                  // copy one of the old entities
                  if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
                        Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
                  newsnap->entities[newsnap->num_entities] = oldsnap->entities[oldindex++];
                  newsnap->num_entities++;
                  oldnum = oldindex >= oldsnap->num_entities ? 9999 : oldsnap->entities[oldindex].number;
            }

            if (word == 0)
                  break;

            if (developer_networkentities.integer >= 2)
            {
                  if (word & QW_U_REMOVE)
                        Con_Printf("remove %i\n", newnum);
                  else if (newnum == oldnum)
                        Con_Printf("delta %i\n", newnum);
                  else
                        Con_Printf("baseline %i\n", newnum);
            }

            if (word & QW_U_REMOVE)
            {
                  if (newnum != oldnum && !delta && !invalid)
                  {
                        cl.qw_validsequence = 0;
                        Con_Printf("WARNING: U_REMOVE %i on full update\n", newnum);
                  }
            }
            else
            {
                  if (newsnap->num_entities >= QW_MAX_PACKET_ENTITIES)
                        Host_Error("EntityFrameQW_CL_ReadFrame: newsnap->num_entities == MAX_PACKETENTITIES");
                  newsnap->entities[newsnap->num_entities] = (newnum == oldnum) ? oldsnap->entities[oldindex] : cl.entities[newnum].state_baseline;
                  EntityStateQW_ReadEntityUpdate(newsnap->entities + newsnap->num_entities, word);
                  newsnap->num_entities++;
            }

            if (newnum == oldnum)
                  oldindex++;
      }

      // expand cl.num_entities to include every entity we've seen this game
      newnum = newsnap->num_entities ? newsnap->entities[newsnap->num_entities - 1].number : 1;
      if (cl.num_entities <= newnum)
      {
            cl.num_entities = newnum + 1;
            if (cl.max_entities < newnum + 1)
                  CL_ExpandEntities(newnum);
      }

      // now update the non-player entities from the snapshot states
      number = cl.maxclients + 1;
      for (newindex = 0;;newindex++)
      {
            newnum = newindex >= newsnap->num_entities ? cl.num_entities : newsnap->entities[newindex].number;
            // kill any missing entities
            for (;number < newnum;number++)
            {
                  if (cl.entities_active[number])
                  {
                        cl.entities_active[number] = false;
                        cl.entities[number].state_current.active = ACTIVE_NOT;
                  }
            }
            if (number >= cl.num_entities)
                  break;
            // update the entity
            ent = &cl.entities[number];
            ent->state_previous = ent->state_current;
            ent->state_current = newsnap->entities[newindex];
            ent->state_current.time = cl.mtime[0];
            CL_MoveLerpEntityStates(ent);
            // the entity lives again...
            cl.entities_active[number] = true;
            number++;
      }
}

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