reduced client memory usage by 29MB by making cl_max_entities dynamic (starts out...
[xonotic/darkplaces.git] / protocol.c
index acb560b..176ae44 100644 (file)
 
 #include "quakedef.h"
 
+// this is 80 bytes
 entity_state_t defaultstate =
 {
-       0,//double time; // time this state was built
-       {0,0,0},//vec3_t origin;
-       {0,0,0},//vec3_t angles;
+       // ! means this is not sent to client
+       0,//double time; // ! time this state was built (used on client for interpolation)
+       {0,0,0},//float origin[3];
+       {0,0,0},//float angles[3];
        0,//int number; // entity number this state is for
-       0,//unsigned short active; // true if a valid state
+       0,//int effects;
        0,//unsigned short modelindex;
        0,//unsigned short frame;
-       0,//unsigned short effects;
        0,//unsigned short tagentity;
-       0,//unsigned short specialvisibilityradius;
-       0,//unsigned short viewmodelforclient;
-       0,//unsigned short exteriormodelforclient;
-       0,//unsigned short nodrawtoclient;
-       0,//unsigned short drawonlytoclient;
-       {0,0,0,0},//short light[4];
-       0,//qbyte lightstyle;
-       0,//qbyte lightpflags;
-       0,//qbyte colormap;
-       0,//qbyte skin;
-       255,//qbyte alpha;
-       16,//qbyte scale;
-       0,//qbyte glowsize;
-       254,//qbyte glowcolor;
-       0,//qbyte flags;
-       0,//qbyte tagindex;
-       {0,0,0,0,0,0}//qbyte unused[6];
+       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; // !
+       {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
+       0,//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 tagindex;
+       {32, 32, 32},//unsigned char colormod[3];
+       // padding to a multiple of 8 bytes (to align the double time)
+       {0,0}//unsigned char unused[2]; // !
 };
 
-void ClearStateToDefault(entity_state_t *s)
-{
-       *s = defaultstate;
-       /*
-       memset(s, 0, sizeof(*s));
-       s->alpha = 255;
-       s->scale = 16;
-       s->glowcolor = 254;
-       */
-}
+// keep track of quake entities because they need to be killed if they get stale
+int cl_lastquakeentity = 0;
+qbyte cl_isquakeentity[MAX_EDICTS];
 
-void EntityState_Write(entity_state_t *ent, sizebuf_t *msg, entity_state_t *delta)
+void EntityFrameQuake_ReadEntity(int bits)
 {
-       int bits;
-       vec3_t org, deltaorg;
-       if (ent->active)
+       int num;
+       entity_t *ent;
+       entity_state_t s;
+
+       if (bits & U_MOREBITS)
+               bits |= (MSG_ReadByte()<<8);
+       if ((bits & U_EXTEND1) && cl.protocol != PROTOCOL_NEHAHRAMOVIE)
        {
-               // if not active last frame, delta from defaults
-               if (!delta->active)
-                       delta = &defaultstate;
-               bits = 0;
-               VectorCopy(ent->origin, org);
-               VectorCopy(delta->origin, deltaorg);
-               if (ent->flags & RENDER_LOWPRECISION)
+               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)\n", num, MAX_EDICTS);
+       if (num < 1)
+               Host_Error("EntityFrameQuake_ReadEntity: invalid entity number (%i)\n", 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 = true;
+       }
+
+       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)             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(cl.protocol);
+       if (bits & U_ANGLE1)    s.angles[0] = MSG_ReadAngle(cl.protocol);
+       if (bits & U_ORIGIN2)   s.origin[1] = MSG_ReadCoord(cl.protocol);
+       if (bits & U_ANGLE2)    s.angles[1] = MSG_ReadAngle(cl.protocol);
+       if (bits & U_ORIGIN3)   s.origin[2] = MSG_ReadCoord(cl.protocol);
+       if (bits & U_ANGLE3)    s.angles[2] = MSG_ReadAngle(cl.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] = (qbyte)(((c >> 5) & 7) * (32.0f / 7.0f));s.colormod[1] = (qbyte)(((c >> 2) & 7) * (32.0f / 7.0f));s.colormod[2] = (qbyte)((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 (cl.protocol == PROTOCOL_NEHAHRAMOVIE && (bits & U_EXTEND1))
+       {
+               // LordHavoc: evil format
+               int i = MSG_ReadFloat();
+               int j = MSG_ReadFloat() * 255.0f;
+               if (i == 2)
                {
-                       if (org[0] > 0)
-                               org[0] = (int) (org[0] + 0.5f);
-                       else
-                               org[0] = (int) (org[0] - 0.5f);
-                       if (org[1] > 0)
-                               org[1] = (int) (org[1] + 0.5f);
-                       else
-                               org[1] = (int) (org[1] - 0.5f);
-                       if (org[2] > 0)
-                               org[2] = (int) (org[2] + 0.5f);
-                       else
-                               org[2] = (int) (org[2] - 0.5f);
+                       i = MSG_ReadFloat();
+                       if (i)
+                               s.effects |= EF_FULLBRIGHT;
                }
-               if (delta->flags & RENDER_LOWPRECISION)
-               {
-                       if (deltaorg[0] > 0)
-                               deltaorg[0] = (int) (deltaorg[0] + 0.5f);
-                       else
-                               deltaorg[0] = (int) (deltaorg[0] - 0.5f);
-                       if (deltaorg[1] > 0)
-                               deltaorg[1] = (int) (deltaorg[1] + 0.5f);
-                       else
-                               deltaorg[1] = (int) (deltaorg[1] - 0.5f);
-                       if (deltaorg[2] > 0)
-                               deltaorg[2] = (int) (deltaorg[2] + 0.5f);
-                       else
-                               deltaorg[2] = (int) (deltaorg[2] - 0.5f);
-               }
-               if (fabs(org[0] - deltaorg[0]) > 0.01f)
-                       bits |= E_ORIGIN1;
-               if (fabs(org[1] - deltaorg[1]) > 0.01f)
-                       bits |= E_ORIGIN2;
-               if (fabs(org[2] - deltaorg[2]) > 0.01f)
-                       bits |= E_ORIGIN3;
-               if ((qbyte) (ent->angles[0] * (256.0f / 360.0f)) != (qbyte) (delta->angles[0] * (256.0f / 360.0f)))
-                       bits |= E_ANGLE1;
-               if ((qbyte) (ent->angles[1] * (256.0f / 360.0f)) != (qbyte) (delta->angles[1] * (256.0f / 360.0f)))
-                       bits |= E_ANGLE2;
-               if ((qbyte) (ent->angles[2] * (256.0f / 360.0f)) != (qbyte) (delta->angles[2] * (256.0f / 360.0f)))
-                       bits |= E_ANGLE3;
-               if ((ent->modelindex ^ delta->modelindex) & 0x00FF)
-                       bits |= E_MODEL1;
-               if ((ent->modelindex ^ delta->modelindex) & 0xFF00)
-                       bits |= E_MODEL2;
-               if ((ent->frame ^ delta->frame) & 0x00FF)
-                       bits |= E_FRAME1;
-               if ((ent->frame ^ delta->frame) & 0xFF00)
-                       bits |= E_FRAME2;
-               if ((ent->effects ^ delta->effects) & 0x00FF)
-                       bits |= E_EFFECTS1;
-               if ((ent->effects ^ delta->effects) & 0xFF00)
-                       bits |= E_EFFECTS2;
-               if (ent->colormap != delta->colormap)
-                       bits |= E_COLORMAP;
-               if (ent->skin != delta->skin)
-                       bits |= E_SKIN;
-               if (ent->alpha != delta->alpha)
-                       bits |= E_ALPHA;
-               if (ent->scale != delta->scale)
-                       bits |= E_SCALE;
-               if (ent->glowsize != delta->glowsize)
-                       bits |= E_GLOWSIZE;
-               if (ent->glowcolor != delta->glowcolor)
-                       bits |= E_GLOWCOLOR;
-               if (ent->flags != delta->flags)
-                       bits |= E_FLAGS;
-               if (ent->tagindex != delta->tagindex || ent->tagentity != delta->tagentity)
-                       bits |= E_TAGATTACHMENT;
-               if (ent->light[0] != delta->light[0] || ent->light[1] != delta->light[1] || ent->light[2] != delta->light[2] || ent->light[3] != delta->light[3])
-                       bits |= E_LIGHT;
-               if (ent->lightstyle != delta->lightstyle)
-                       bits |= E_LIGHTSTYLE;
-               if (ent->lightpflags != delta->lightpflags)
-                       bits |= E_LIGHTPFLAGS;
-
-               if (bits) // don't send anything if it hasn't changed
-               {
-                       if (bits & 0xFF000000)
-                               bits |= E_EXTEND3;
-                       if (bits & 0x00FF0000)
-                               bits |= E_EXTEND2;
-                       if (bits & 0x0000FF00)
-                               bits |= E_EXTEND1;
+               if (j < 0)
+                       s.alpha = 0;
+               else if (j == 0 || j >= 255)
+                       s.alpha = 255;
+               else
+                       s.alpha = j;
+       }
 
-                       MSG_WriteShort(msg, ent->number);
-                       MSG_WriteByte(msg, bits & 0xFF);
-                       if (bits & E_EXTEND1)
-                       {
-                               MSG_WriteByte(msg, (bits >> 8) & 0xFF);
-                               if (bits & E_EXTEND2)
-                               {
-                                       MSG_WriteByte(msg, (bits >> 16) & 0xFF);
-                                       if (bits & E_EXTEND3)
-                                               MSG_WriteByte(msg, (bits >> 24) & 0xFF);
-                               }
-                       }
-                       // 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)
+       ent->state_previous = ent->state_current;
+       ent->state_current = s;
+       if (ent->state_current.active)
+       {
+               CL_MoveLerpEntityStates(ent);
+               cl_entities_active[ent->state_current.number] = true;
+       }
+
+       if (msg_badread)
+               Host_Error("EntityFrameQuake_ReadEntity: read error\n");
+}
+
+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])
                        {
-                               if (bits & E_ORIGIN1)
-                                       MSG_WriteShort(msg, org[0]);
-                               if (bits & E_ORIGIN2)
-                                       MSG_WriteShort(msg, org[1]);
-                               if (bits & E_ORIGIN3)
-                                       MSG_WriteShort(msg, org[2]);
-                               if (bits & E_ANGLE1)
-                                       MSG_WriteAngle(msg, ent->angles[0]);
-                               if (bits & E_ANGLE2)
-                                       MSG_WriteAngle(msg, ent->angles[1]);
-                               if (bits & E_ANGLE3)
-                                       MSG_WriteAngle(msg, ent->angles[2]);
+                               cl_isquakeentity[num] = true;
+                               cl_lastquakeentity = num;
                        }
                        else
                        {
-                               if (bits & E_ORIGIN1)
-                                       MSG_WriteFloat(msg, org[0]);
-                               if (bits & E_ORIGIN2)
-                                       MSG_WriteFloat(msg, org[1]);
-                               if (bits & E_ORIGIN3)
-                                       MSG_WriteFloat(msg, org[2]);
-                               if (bits & E_ANGLE1)
-                                       MSG_WritePreciseAngle(msg, ent->angles[0]);
-                               if (bits & E_ANGLE2)
-                                       MSG_WritePreciseAngle(msg, ent->angles[1]);
-                               if (bits & E_ANGLE3)
-                                       MSG_WritePreciseAngle(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 (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]);
+                               cl_isquakeentity[num] = false;
+                               cl_entities_active[num] = false;
+                               cl_entities[num].state_current = defaultstate;
+                               cl_entities[num].state_current.number = num;
                        }
-                       if (bits & E_LIGHTSTYLE)
-                               MSG_WriteByte(msg, ent->lightstyle);
-                       if (bits & E_LIGHTPFLAGS)
-                               MSG_WriteByte(msg, ent->lightpflags);
                }
        }
-       else if (delta->active)
-               MSG_WriteShort(msg, ent->number | 0x8000);
 }
 
-void EntityState_ReadUpdate(entity_state_t *e, int number)
+void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int numstates, const entity_state_t *states)
 {
-       int bits;
-       cl_entities_active[number] = true;
-       e->active = true;
-       e->time = cl.mtime[0];
-       e->number = number;
+       const entity_state_t *s;
+       entity_state_t baseline;
+       int i, bits;
+       sizebuf_t buf;
+       qbyte data[128];
+
+       // prepare the buffer
+       memset(&buf, 0, sizeof(buf));
+       buf.data = data;
+       buf.maxsize = sizeof(data);
+
+       for (i = 0, s = states;i < numstates;i++, s++)
+       {
+               // 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 = sv.edicts[s->number].e->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)
+                               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 extensions are disabled, clear the relevant update flags
+               if (sv.netquakecompatible)
+                       bits &= 0x7FFF;
+
+               // 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 (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)                     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[0] * (7.0f / 32.0f), 7) << 2) | ((int)bound(0, s->colormod[0] * (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);
+
+               // if the commit is full, we're done this frame
+               if (msg->cursize + buf.cursize > msg->maxsize)
+               {
+                       // next frame we will continue where we left off
+                       break;
+               }
+               // write the message to the packet
+               SZ_Write(msg, buf.data, buf.cursize);
+       }
+}
+
+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)
+               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 ((qbyte) (n->angles[0] * (256.0f / 360.0f)) != (qbyte) (o->angles[0] * (256.0f / 360.0f)))
+               bits |= E_ANGLE1;
+       if ((qbyte) (n->angles[1] * (256.0f / 360.0f)) != (qbyte) (o->angles[1] * (256.0f / 360.0f)))
+               bits |= E_ANGLE2;
+       if ((qbyte) (n->angles[2] * (256.0f / 360.0f)) != (qbyte) (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 if (sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4 || sv.protocol == PROTOCOL_DARKPLACES5 || sv.protocol == PROTOCOL_DARKPLACES6)
+       {
+               // 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_DARKPLACES5 || sv.protocol == PROTOCOL_DARKPLACES6) && !(ent->flags & RENDER_LOWPRECISION))
+       {
+               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]);
+       }
+       else
+       {
+               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]);
+       }
+       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;
+       if (ent->active)
+       {
+               // 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)
+               {
+                       // write the remove number
+                       MSG_WriteShort(msg, ent->number | 0x8000);
+               }
+       }
+}
 
+int EntityState_ReadExtendBits(void)
+{
+       unsigned int bits;
        bits = MSG_ReadByte();
-       if (bits & E_EXTEND1)
+       if (bits & 0x00000080)
        {
                bits |= MSG_ReadByte() << 8;
-               if (bits & E_EXTEND2)
+               if (bits & 0x00008000)
                {
                        bits |= MSG_ReadByte() << 16;
-                       if (bits & E_EXTEND3)
+                       if (bits & 0x00800000)
                                bits |= MSG_ReadByte() << 24;
                }
        }
+       return bits;
+}
 
+void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
+{
        if (cl.protocol == PROTOCOL_DARKPLACES2)
        {
                if (bits & E_ORIGIN1)
-                       e->origin[0] = (signed short) MSG_ReadShort();
+                       e->origin[0] = MSG_ReadCoord16i();
                if (bits & E_ORIGIN2)
-                       e->origin[1] = (signed short) MSG_ReadShort();
+                       e->origin[1] = MSG_ReadCoord16i();
                if (bits & E_ORIGIN3)
-                       e->origin[2] = (signed short) MSG_ReadShort();
+                       e->origin[2] = MSG_ReadCoord16i();
        }
-       else
+       else if (cl.protocol == PROTOCOL_DARKPLACES1 || cl.protocol == PROTOCOL_DARKPLACES3 || cl.protocol == PROTOCOL_DARKPLACES4 || cl.protocol == PROTOCOL_DARKPLACES5 || cl.protocol == PROTOCOL_DARKPLACES6)
        {
                if (bits & E_FLAGS)
                        e->flags = MSG_ReadByte();
-               if (e->flags & RENDER_LOWPRECISION || cl.protocol == PROTOCOL_DARKPLACES2)
+               if (e->flags & RENDER_LOWPRECISION)
                {
                        if (bits & E_ORIGIN1)
-                               e->origin[0] = (signed short) MSG_ReadShort();
+                               e->origin[0] = MSG_ReadCoord16i();
                        if (bits & E_ORIGIN2)
-                               e->origin[1] = (signed short) MSG_ReadShort();
+                               e->origin[1] = MSG_ReadCoord16i();
                        if (bits & E_ORIGIN3)
-                               e->origin[2] = (signed short) MSG_ReadShort();
+                               e->origin[2] = MSG_ReadCoord16i();
                }
                else
                {
                        if (bits & E_ORIGIN1)
-                               e->origin[0] = MSG_ReadFloat();
+                               e->origin[0] = MSG_ReadCoord32f();
                        if (bits & E_ORIGIN2)
-                               e->origin[1] = MSG_ReadFloat();
+                               e->origin[1] = MSG_ReadCoord32f();
                        if (bits & E_ORIGIN3)
-                               e->origin[2] = MSG_ReadFloat();
+                               e->origin[2] = MSG_ReadCoord32f();
                }
        }
-       if (cl.protocol == PROTOCOL_DARKPLACES5 && !(e->flags & RENDER_LOWPRECISION))
+       else
+               Host_Error("EntityState_ReadFields: unknown cl.protocol %i\n", cl.protocol);
+       if ((cl.protocol == PROTOCOL_DARKPLACES5 || cl.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
        {
                if (bits & E_ANGLE1)
-                       e->angles[0] = MSG_ReadPreciseAngle();
+                       e->angles[0] = MSG_ReadAngle16i();
                if (bits & E_ANGLE2)
-                       e->angles[1] = MSG_ReadPreciseAngle();
+                       e->angles[1] = MSG_ReadAngle16i();
                if (bits & E_ANGLE3)
-                       e->angles[2] = MSG_ReadPreciseAngle();
+                       e->angles[2] = MSG_ReadAngle16i();
        }
        else
        {
                if (bits & E_ANGLE1)
-                       e->angles[0] = MSG_ReadAngle();
+                       e->angles[0] = MSG_ReadAngle8i();
                if (bits & E_ANGLE2)
-                       e->angles[1] = MSG_ReadAngle();
+                       e->angles[1] = MSG_ReadAngle8i();
                if (bits & E_ANGLE3)
-                       e->angles[2] = MSG_ReadAngle();
+                       e->angles[2] = MSG_ReadAngle8i();
        }
        if (bits & E_MODEL1)
                e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
@@ -330,15 +604,15 @@ void EntityState_ReadUpdate(entity_state_t *e, int number)
                        e->flags = MSG_ReadByte();
        if (bits & E_TAGATTACHMENT)
        {
-               e->tagentity = MSG_ReadShort();
+               e->tagentity = (unsigned short) MSG_ReadShort();
                e->tagindex = MSG_ReadByte();
        }
        if (bits & E_LIGHT)
        {
-               e->light[0] = MSG_ReadShort();
-               e->light[1] = MSG_ReadShort();
-               e->light[2] = MSG_ReadShort();
-               e->light[3] = MSG_ReadShort();
+               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();
@@ -347,7 +621,7 @@ void EntityState_ReadUpdate(entity_state_t *e, int number)
 
        if (developer_networkentities.integer >= 2)
        {
-               Con_Printf("ReadUpdate e%i", number);
+               Con_Printf("ReadFields e%i", e->number);
 
                if (bits & E_ORIGIN1)
                        Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
@@ -381,10 +655,10 @@ void EntityState_ReadUpdate(entity_state_t *e, int number)
                        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)                       
+               if (bits & E_LIGHTPFLAGS)
                        Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
 
                if (bits & E_TAGATTACHMENT)
@@ -395,18 +669,29 @@ void EntityState_ReadUpdate(entity_state_t *e, int number)
        }
 }
 
+// (client and server) allocates a new empty database
+entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
+{
+       return 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(entity_database_t *d)
+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(entity_database_t *d, int frame)
+void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
 {
        int i;
-       if (d->ackframe < frame)
-               d->ackframe = frame;
+       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)
@@ -424,27 +709,13 @@ void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
        f->framenum = framenum;
        f->numentities = 0;
        if (eye == NULL)
-       {
                VectorClear(f->eye);
-       }
        else
-       {
                VectorCopy(eye, f->eye);
-       }
-}
-
-// (server) adds an entity to frame
-void EntityFrame_AddEntity(entity_frame_t *f, entity_state_t *s)
-{
-       if (f->numentities < MAX_ENTITY_DATABASE)
-       {
-               f->entitydata[f->numentities] = *s;
-               f->entitydata[f->numentities++].active = true;
-       }
 }
 
 // (server and client) reads a frame from the database
-void EntityFrame_FetchFrame(entity_database_t *d, int framenum, entity_frame_t *f)
+void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
 {
        int i, n;
        EntityFrame_Clear(f, NULL, -1);
@@ -464,18 +735,18 @@ void EntityFrame_FetchFrame(entity_database_t *d, int framenum, entity_frame_t *
 }
 
 // (server and client) adds a entity_frame to the database, for future reference
-void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f)
+void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
 {
        int n, e;
        entity_frameinfo_t *info;
 
-       VectorCopy(f->eye, d->eye);
+       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 + f->numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
+               if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
                {
                        // ran out of room, dump database
                        EntityFrame_ClearDatabase(d);
@@ -483,14 +754,14 @@ void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f)
        }
 
        info = &d->frames[d->numframes];
-       info->framenum = f->framenum;
+       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 == f->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");
@@ -503,40 +774,54 @@ void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f)
                info->firstentity = d->frames[d->numframes - 1].endentity;
        else
                info->firstentity = 0;
-       info->endentity = info->firstentity + f->numentities;
+       info->endentity = info->firstentity + numentities;
        d->numframes++;
 
        n = info->firstentity % MAX_ENTITY_DATABASE;
        e = MAX_ENTITY_DATABASE - n;
-       if (e > f->numentities)
-               e = f->numentities;
-       memcpy(d->entitydata + n, f->entitydata, sizeof(entity_state_t) * e);
-       if (f->numentities > e)
-               memcpy(d->entitydata, f->entitydata + e, sizeof(entity_state_t) * (f->numentities - e));
+       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
 static entity_frame_t deltaframe; // FIXME?
-void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
+void EntityFrame_WriteFrame(sizebuf_t *msg, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
 {
        int i, onum, number;
        entity_frame_t *o = &deltaframe;
-       entity_state_t *ent, *delta;
+       const entity_state_t *ent, *delta;
+       vec3_t eye;
+
+       d->latestframenum++;
 
-       EntityFrame_AddFrame(d, f);
+       VectorClear(eye);
+       for (i = 0;i < numstates;i++)
+       {
+               if (states[i].number == viewentnum)
+               {
+                       VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
+                       break;
+               }
+       }
+
+       EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
+
+       EntityFrame_FetchFrame(d, d->ackframenum, o);
 
-       EntityFrame_FetchFrame(d, d->ackframe > 0 ? d->ackframe : -1, o);
        MSG_WriteByte (msg, svc_entities);
        MSG_WriteLong (msg, o->framenum);
-       MSG_WriteLong (msg, f->framenum);
-       MSG_WriteFloat (msg, f->eye[0]);
-       MSG_WriteFloat (msg, f->eye[1]);
-       MSG_WriteFloat (msg, f->eye[2]);
+       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 < f->numentities;i++)
+       for (i = 0;i < numstates;i++)
        {
-               ent = f->entitydata + i;
+               ent = states + i;
                number = ent->number;
                for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
                {
@@ -555,7 +840,7 @@ void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
                        // delta from defaults
                        delta = &defaultstate;
                }
-               EntityState_Write(ent, msg, delta);
+               EntityState_WriteUpdate(ent, msg, delta);
        }
        for (;onum < o->numentities;onum++)
        {
@@ -567,18 +852,25 @@ void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
 
 // (client) reads a frame from network stream
 static entity_frame_t framedata; // FIXME?
-void EntityFrame_Read(entity_database_t *d)
+void EntityFrame_CL_ReadFrame(void)
 {
-       int number, removed;
+       int i, number, removed;
        entity_frame_t *f = &framedata, *delta = &deltaframe;
        entity_state_t *e, *old, *oldend;
+       entity_t *ent;
+       entityframe_database_t *d;
+       if (!cl.entitydatabase)
+               cl.entitydatabase = EntityFrame_AllocDatabase(cl_entities_mempool);
+       d = cl.entitydatabase;
 
        EntityFrame_Clear(f, NULL, -1);
 
        // read the frame header info
        f->time = cl.mtime[0];
        number = MSG_ReadLong();
-       f->framenum = MSG_ReadLong();
+       for (i = 0;i < LATESTFRAMENUMS-1;i++)
+               cl.latestframenums[i] = cl.latestframenums[i+1];
+       cl.latestframenums[LATESTFRAMENUMS-1] = f->framenum = MSG_ReadLong();
        f->eye[0] = MSG_ReadFloat();
        f->eye[1] = MSG_ReadFloat();
        f->eye[2] = MSG_ReadFloat();
@@ -587,7 +879,7 @@ void EntityFrame_Read(entity_database_t *d)
        old = delta->entitydata;
        oldend = old + delta->numentities;
        // read entities until we hit the magic 0xFFFF end tag
-       while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF)
+       while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
        {
                if (msg_badread)
                        Host_Error("EntityFrame_Read: read error\n");
@@ -630,7 +922,17 @@ void EntityFrame_Read(entity_database_t *d)
                                *e = defaultstate;
                        }
 
-                       EntityState_ReadUpdate(e, number);
+                       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 = true;
+                       e->time = cl.mtime[0];
+                       e->number = number;
+                       EntityState_ReadFields(e, EntityState_ReadExtendBits());
                }
        }
        while (old < oldend)
@@ -640,12 +942,44 @@ void EntityFrame_Read(entity_database_t *d)
                f->entitydata[f->numentities] = *old++;
                f->entitydata[f->numentities++].time = cl.mtime[0];
        }
-       EntityFrame_AddFrame(d, f);
+       EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
+
+       memset(cl_entities_active, 0, cl_num_entities * sizeof(qbyte));
+       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 = false;
+                       }
+               }
+               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 = false;
+               }
+       }
 }
 
 
 // (client) returns the frame number of the most recent frame recieved
-int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d)
+int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
 {
        if (d->numframes)
                return d->frames[d->numframes - 1].framenum;
@@ -658,7 +992,7 @@ int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d)
 
 
 
-entity_state_t *EntityFrame4_GetReferenceEntity(entity_database4_t *d, int number)
+entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
 {
        if (d->maxreferenceentities <= number)
        {
@@ -681,7 +1015,7 @@ entity_state_t *EntityFrame4_GetReferenceEntity(entity_database4_t *d, int numbe
        return d->referenceentity + number;
 }
 
-void EntityFrame4_AddCommitEntity(entity_database4_t *d, entity_state_t *s)
+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)
@@ -698,17 +1032,16 @@ void EntityFrame4_AddCommitEntity(entity_database4_t *d, entity_state_t *s)
        d->currentcommit->entity[d->currentcommit->numentities++] = *s;
 }
 
-entity_database4_t *EntityFrame4_AllocDatabase(mempool_t *pool)
+entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
 {
-       entity_database4_t *d;
+       entityframe4_database_t *d;
        d = Mem_Alloc(pool, sizeof(*d));
        d->mempool = pool;
        EntityFrame4_ResetDatabase(d);
-       d->ackframenum = -1;
        return d;
 }
 
-void EntityFrame4_FreeDatabase(entity_database4_t *d)
+void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
 {
        int i;
        for (i = 0;i < MAX_ENTITY_HISTORY;i++)
@@ -719,10 +1052,9 @@ void EntityFrame4_FreeDatabase(entity_database4_t *d)
        Mem_Free(d);
 }
 
-void EntityFrame4_ResetDatabase(entity_database4_t *d)
+void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
 {
        int i;
-       d->ackframenum = -1;
        d->referenceframenum = -1;
        for (i = 0;i < MAX_ENTITY_HISTORY;i++)
                d->commit[i].numentities = 0;
@@ -730,7 +1062,7 @@ void EntityFrame4_ResetDatabase(entity_database4_t *d)
                d->referenceentity[i] = defaultstate;
 }
 
-int EntityFrame4_AckFrame(entity_database4_t *d, int framenum)
+int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
 {
        int i, j, found;
        entity_database4_commit_t *commit;
@@ -740,6 +1072,9 @@ int EntityFrame4_AckFrame(entity_database4_t *d, int framenum)
                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)
@@ -789,43 +1124,22 @@ int EntityFrame4_AckFrame(entity_database4_t *d, int framenum)
        return found;
 }
 
-int EntityFrame4_SV_WriteFrame_Entity(entity_database4_t *d, sizebuf_t *msg, int maxbytes, entity_state_t *s)
-{
-       qbyte data[128];
-       sizebuf_t buf;
-       entity_state_t *e;
-       // prepare the buffer
-       memset(&buf, 0, sizeof(buf));
-       buf.data = data;
-       buf.maxsize = sizeof(data);
-       // make the message
-       e = EntityFrame4_GetReferenceEntity(d, s->number);
-       // send an update (may update or remove the entity)
-       EntityState_Write(s, &buf, e);
-       // if the message is empty, skip out now
-       if (!buf.cursize)
-               return true;
-       // if the commit is full, we're done
-       if (msg->cursize + buf.cursize + 2 >= min(msg->maxsize, maxbytes))
-               return false;
-       // add the entity to the commit
-       EntityFrame4_AddCommitEntity(d, s);
-       // write the message to the packet
-       SZ_Write(msg, buf.data, buf.cursize);
-       // carry on
-       return true;
-}
-
-extern void CL_MoveLerpEntityStates(entity_t *ent);
-void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
+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(cl_entities_mempool);
+       d = cl.entitydatabase4;
        // read the number of the frame this refers to
        referenceframenum = MSG_ReadLong();
        // read the number of this frame
-       framenum = MSG_ReadLong();
+       for (i = 0;i < LATESTFRAMENUMS-1;i++)
+               cl.latestframenums[i] = cl.latestframenums[i+1];
+       cl.latestframenums[LATESTFRAMENUMS-1] = framenum = MSG_ReadLong();
        // read the start number
-       enumber = MSG_ReadShort();
+       enumber = (unsigned short) MSG_ReadShort();
        if (developer_networkentities.integer >= 1)
        {
                Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
@@ -834,7 +1148,7 @@ void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
                                Con_Printf(" %i", d->commit[i].framenum);
                Con_Print("\n");
        }
-       if (!EntityFrame4_AckFrame(d, referenceframenum))
+       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;
@@ -845,7 +1159,7 @@ void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
                if (!d->commit[i].numentities)
                {
                        d->currentcommit = d->commit + i;
-                       d->currentcommit->framenum = d->ackframenum = framenum;
+                       d->currentcommit->framenum = framenum;
                        d->currentcommit->numentities = 0;
                }
        }
@@ -870,17 +1184,24 @@ void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
                }
                // 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)
+                       if (skip || enumber >= cl_num_entities)
                        {
                                if (enumber == cnumber && (n & 0x8000) == 0)
                                {
                                        entity_state_t tempstate;
-                                       EntityState_ReadUpdate(&tempstate, enumber);
+                                       EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
                                }
                                continue;
                        }
@@ -888,6 +1209,7 @@ void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
                        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)
                        {
@@ -896,26 +1218,28 @@ void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
                                        // simply removed
                                        if (developer_networkentities.integer >= 2)
                                                Con_Printf("entity %i: remove\n", enumber);
-                                       cl_entities[enumber].state_current = defaultstate;
+                                       *s = defaultstate;
                                }
                                else
                                {
                                        // read the changes
                                        if (developer_networkentities.integer >= 2)
                                                Con_Printf("entity %i: update\n", enumber);
-                                       EntityState_ReadUpdate(&cl_entities[enumber].state_current, enumber);
+                                       s->active = true;
+                                       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;
+                       // set the update time
+                       s->time = cl.mtime[0];
                        // fix the number (it gets wiped occasionally by copying from defaultstate)
-                       cl_entities[enumber].state_current.number = enumber;
+                       s->number = enumber;
                        // check if we need to update the lerp stuff
-                       if (cl_entities[enumber].state_current.active)
-                       {
+                       if (s->active)
                                CL_MoveLerpEntityStates(&cl_entities[enumber]);
-                               cl_entities_active[enumber] = true;
-                       }
                        // add this to the commit entry whether it is modified or not
                        if (d->currentcommit)
                                EntityFrame4_AddCommitEntity(d, &cl_entities[enumber].state_current);
@@ -934,4 +1258,791 @@ void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
                EntityFrame4_ResetDatabase(d);
 }
 
+void EntityFrame4_WriteFrame(sizebuf_t *msg, 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;
+       qbyte data[128];
+
+       // if there isn't enough space to accomplish anything, skip it
+       if (msg->cursize + 24 > msg->maxsize)
+               return;
+
+       // 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;
+       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 >= 1)
+       {
+               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 >= sv.max_edicts)
+               startnumber = 1;
+       else
+               startnumber = bound(1, d->currententitynumber, sv.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 < sv.max_edicts;n++)
+       {
+               // 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)
+                       {
+                               // 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 > msg->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;
+}
+
+
+
+
+#define E5_PROTOCOL_PRIORITYLEVELS 32
+
+entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
+{
+       entityframe5_database_t *d;
+       d = Mem_Alloc(pool, sizeof(*d));
+       EntityFrame5_ResetDatabase(d);
+       return d;
+}
+
+void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
+{
+       Mem_Free(d);
+}
+
+void EntityFrame5_ResetDatabase(entityframe5_database_t *d)
+{
+       int i;
+       memset(d, 0, sizeof(*d));
+       d->latestframenum = 0;
+       for (i = 0;i < MAX_EDICTS;i++)
+               d->states[i] = defaultstate;
+}
+
+
+int EntityState5_Priority(entityframe5_database_t *d, entity_state_t *view, entity_state_t *s, int changedbits, int age)
+{
+       int lowprecision, limit, priority;
+       double distance;
+       if (!changedbits)
+               return 0;
+       if (!s->active/* && changedbits & E5_FULLUPDATE*/)
+               return E5_PROTOCOL_PRIORITYLEVELS - 1;
+       // check whole attachment chain to judge relevance to player
+       lowprecision = false;
+       for (limit = 0;limit < 256;limit++)
+       {
+               if (s == view)
+                       return E5_PROTOCOL_PRIORITYLEVELS - 1;
+               if (s->flags & RENDER_VIEWMODEL)
+                       return E5_PROTOCOL_PRIORITYLEVELS - 1;
+               if (s->flags & RENDER_LOWPRECISION)
+                       lowprecision = true;
+               if (!s->tagentity)
+               {
+                       if (VectorCompare(s->origin, view->origin))
+                               return E5_PROTOCOL_PRIORITYLEVELS - 1;
+                       break;
+               }
+               s = d->states + s->tagentity;
+       }
+       if (limit >= 256)
+               Con_Printf("Protocol: Runaway loop recursing tagentity links on entity %i\n", s->number);
+       // it's not a viewmodel for this client
+       distance = VectorDistance(view->origin, s->origin);
+       priority = (E5_PROTOCOL_PRIORITYLEVELS / 2) + age - (int)(distance * (E5_PROTOCOL_PRIORITYLEVELS / 16384.0f));
+       if (lowprecision)
+               priority -= (E5_PROTOCOL_PRIORITYLEVELS / 4);
+       //if (changedbits & E5_FULLUPDATE)
+       //      priority += 4;
+       //if (changedbits & (E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
+       //      priority += 4;
+       return (int) bound(1, priority, E5_PROTOCOL_PRIORITYLEVELS - 1);
+}
+
+void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
+{
+       unsigned int bits = 0;
+       if (!s->active)
+               MSG_WriteShort(msg, number | 0x8000);
+       else
+       {
+               bits = changedbits;
+               if ((bits & E5_ORIGIN) && (s->origin[0] < -4096 || s->origin[0] >= 4096 || s->origin[1] < -4096 || s->origin[1] >= 4096 || s->origin[2] < -4096 || s->origin[2] >= 4096))
+                       bits |= E5_ORIGIN32;
+               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 >= 65536)
+                               bits |= E5_EFFECTS32;
+                       else if (s->effects >= 256)
+                               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]);
+               }
+       }
+}
+
+void EntityState5_ReadUpdate(entity_state_t *s)
+{
+       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 = true;
+       }
+       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 (developer_networkentities.integer >= 2)
+       {
+               Con_Printf("ReadFields e%i", s->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");
+                       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);
+               Con_Print("\n");
+       }
+}
+
+int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
+{
+       unsigned int bits = 0;
+       if (n->active)
+       {
+               if (!o->active)
+                       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;
+       }
+       else
+               if (o->active)
+                       bits |= E5_FULLUPDATE;
+       return bits;
+}
+
+void EntityFrame5_CL_ReadFrame(void)
+{
+       int i, n, enumber;
+       entity_t *ent;
+       entity_state_t *s;
+       // read the number of this frame to echo back in next input packet
+       for (i = 0;i < LATESTFRAMENUMS-1;i++)
+               cl.latestframenums[i] = cl.latestframenums[i+1];
+       cl.latestframenums[LATESTFRAMENUMS-1] = 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);
+               }
+               // set the cl_entities_active flag
+               cl_entities_active[enumber] = s->active;
+               // 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)
+                       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)
+                               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);
+               }
+       }
+}
+
+void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum, int viewentnum)
+{
+       int i, j, k, l, bits;
+       entityframe5_changestate_t *s, *s2;
+       entityframe5_packetlog_t *p, *p2;
+       qbyte statsdeltabits[(MAX_CL_STATS+7)/8];
+       // scan for packets that were lost
+       for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
+       {
+               if (p->packetnumber && p->packetnumber <= framenum)
+               {
+                       // packet was lost - merge deltabits into the main array so they
+                       // will be re-sent, but only if there is no newer update of that
+                       // bit in the logs (as those will arrive before this update)
+                       for (j = 0, s = p->states;j < p->numstates;j++, s++)
+                       {
+                               // check for any newer updates to this entity and mask off any
+                               // overlapping bits (we don't need to send something again if
+                               // it has already been sent more recently)
+                               bits = s->bits & ~d->deltabits[s->number];
+                               for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
+                               {
+                                       if (p2->packetnumber > framenum)
+                                       {
+                                               for (l = 0, s2 = p2->states;l < p2->numstates;l++, s2++)
+                                               {
+                                                       if (s2->number == s->number)
+                                                       {
+                                                               bits &= ~s2->bits;
+                                                               break;
+                                                       }
+                                               }
+                                       }
+                               }
+                               // if the bits haven't all been cleared, there were some bits
+                               // lost with this packet, so set them again now
+                               if (bits)
+                               {
+                                       d->deltabits[s->number] |= bits;
+                                       d->priorities[s->number] = EntityState5_Priority(d, d->states + viewentnum, d->states + s->number, d->deltabits[s->number], d->latestframenum - d->updateframenum[s->number]);
+                               }
+                       }
+                       // mark lost stats
+                       for (j = 0;j < MAX_CL_STATS;j++)
+                       {
+                               for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
+                                       statsdeltabits[l] = p->statsdeltabits[l] & ~d->statsdeltabits[l];
+                               for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS;k++, p2++)
+                                       if (p2->packetnumber > framenum)
+                                               for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
+                                                       statsdeltabits[l] = p->statsdeltabits[l] & ~p2->statsdeltabits[l];
+                               for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
+                                       d->statsdeltabits[l] |= statsdeltabits[l];
+                       }
+                       // delete this packet log as it is now obsolete
+                       p->packetnumber = 0;
+               }
+       }
+}
+
+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;
+}
+
+int entityframe5_prioritychaincounts[E5_PROTOCOL_PRIORITYLEVELS];
+unsigned short entityframe5_prioritychains[E5_PROTOCOL_PRIORITYLEVELS][ENTITYFRAME5_MAXSTATES];
+
+void EntityFrame5_WriteFrame(sizebuf_t *msg, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int *stats)
+{
+       const entity_state_t *n;
+       int i, num, l, framenum, packetlognumber, priority;
+       sizebuf_t buf;
+       qbyte data[128];
+       entityframe5_packetlog_t *packetlog;
+
+       framenum = d->latestframenum + 1;
+
+       // 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)
+       {
+               EntityFrame5_LostFrame(d, framenum, viewentnum);
+               packetlognumber = 0;
+       }
+
+       // prepare the buffer
+       memset(&buf, 0, sizeof(buf));
+       buf.data = data;
+       buf.maxsize = sizeof(data);
+
+       // detect changes in stats
+       for (i = 0;i < MAX_CL_STATS;i++)
+       {
+               if (d->stats[i] != stats[i])
+               {
+                       d->statsdeltabits[i>>3] |= (1<<(i&7));
+                       d->stats[i] = stats[i];
+               }
+       }
+
+       // detect changes in states
+       num = 0;
+       for (i = 0, n = states;i < numstates;i++, n++)
+       {
+               // 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] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
+                               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;
+               }
+               SETPVSBIT(d->visiblebits, num);
+               d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
+               d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
+               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 < sv.num_edicts;num++)
+       {
+               if (CHECKPVSBIT(d->visiblebits, num))
+               {
+                       CLEARPVSBIT(d->visiblebits, num);
+                       d->deltabits[num] = E5_FULLUPDATE;
+                       d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
+                       d->states[num] = defaultstate;
+                       d->states[num].number = num;
+               }
+       }
+
+       // build lists of entities by priority level
+       memset(entityframe5_prioritychaincounts, 0, sizeof(entityframe5_prioritychaincounts));
+       l = 0;
+       for (num = 0;num < sv.num_edicts;num++)
+       {
+               if (d->priorities[num])
+               {
+                       l = num;
+                       priority = d->priorities[num];
+                       if (entityframe5_prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
+                               entityframe5_prioritychains[priority][entityframe5_prioritychaincounts[priority]++] = num;
+               }
+       }
+
+       // add packetlog entry
+       packetlog = d->packetlog + packetlognumber;
+       packetlog->packetnumber = framenum;
+       packetlog->numstates = 0;
+       // write stat updates
+       if (sv.protocol == PROTOCOL_DARKPLACES6)
+       {
+               for (i = 0;i < MAX_CL_STATS;i++)
+               {
+                       if (d->statsdeltabits[i>>3] & (1<<(i&7)))
+                       {
+                               d->statsdeltabits[i>>3] &= ~(1<<(i&7));
+                               packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
+                               if (d->stats[i] >= 0 && d->stats[i] < 256)
+                               {
+                                       MSG_WriteByte(msg, svc_updatestatubyte);
+                                       MSG_WriteByte(msg, i);
+                                       MSG_WriteByte(msg, d->stats[i]);
+                               }
+                               else
+                               {
+                                       MSG_WriteByte(msg, svc_updatestat);
+                                       MSG_WriteByte(msg, i);
+                                       MSG_WriteLong(msg, d->stats[i]);
+                               }
+                       }
+               }
+       }
+       // write state updates
+       d->latestframenum = framenum;
+       MSG_WriteByte(msg, svc_entities);
+       MSG_WriteLong(msg, framenum);
+       for (priority = E5_PROTOCOL_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
+       {
+               for (i = 0;i < entityframe5_prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
+               {
+                       num = entityframe5_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 > msg->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);
+}