implemented PRYDON_CLIENTCURSOR extension (clientside mouse pointer that feeds back...
[divverent/darkplaces.git] / protocol.c
1
2 #include "quakedef.h"
3
4 // this is 80 bytes
5 entity_state_t defaultstate =
6 {
7         // ! means this is not sent to client
8         0,//double time; // ! time this state was built (used on client for interpolation)
9         {0,0,0},//float origin[3];
10         {0,0,0},//float angles[3];
11         0,//int number; // entity number this state is for
12         0,//int effects;
13         0,//unsigned short modelindex;
14         0,//unsigned short frame;
15         0,//unsigned short tagentity;
16         0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
17         0,//unsigned short viewmodelforclient; // !
18         0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
19         0,//unsigned short nodrawtoclient; // !
20         0,//unsigned short drawonlytoclient; // !
21         {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
22         0,//unsigned char active; // true if a valid state
23         0,//unsigned char lightstyle;
24         0,//unsigned char lightpflags;
25         0,//unsigned char colormap;
26         0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
27         255,//unsigned char alpha;
28         16,//unsigned char scale;
29         0,//unsigned char glowsize;
30         254,//unsigned char glowcolor;
31         0,//unsigned char flags;
32         0,//unsigned char tagindex;
33         {32, 32, 32},//unsigned char colormod[3];
34         // padding to a multiple of 8 bytes (to align the double time)
35         {0,0}//unsigned char unused[2]; // !
36 };
37
38 // keep track of quake entities because they need to be killed if they get stale
39 int cl_lastquakeentity = 0;
40 qbyte cl_isquakeentity[MAX_EDICTS];
41
42 void EntityFrameQuake_ReadEntity(int bits)
43 {
44         int num;
45         entity_t *ent;
46         entity_state_t s;
47
48         if (bits & U_MOREBITS)
49                 bits |= (MSG_ReadByte()<<8);
50         if ((bits & U_EXTEND1) && cl.protocol != PROTOCOL_NEHAHRAMOVIE)
51         {
52                 bits |= MSG_ReadByte() << 16;
53                 if (bits & U_EXTEND2)
54                         bits |= MSG_ReadByte() << 24;
55         }
56
57         if (bits & U_LONGENTITY)
58                 num = (unsigned short) MSG_ReadShort ();
59         else
60                 num = MSG_ReadByte ();
61
62         if (num >= MAX_EDICTS)
63                 Host_Error("EntityFrameQuake_ReadEntity: entity number (%i) >= MAX_EDICTS (%i)\n", num, MAX_EDICTS);
64         if (num < 1)
65                 Host_Error("EntityFrameQuake_ReadEntity: invalid entity number (%i)\n", num);
66
67         ent = cl_entities + num;
68
69         // note: this inherits the 'active' state of the baseline chosen
70         // (state_baseline is always active, state_current may not be active if
71         // the entity was missing in the last frame)
72         if (bits & U_DELTA)
73                 s = ent->state_current;
74         else
75         {
76                 s = ent->state_baseline;
77                 s.active = true;
78         }
79
80         cl_isquakeentity[num] = true;
81         if (cl_lastquakeentity < num)
82                 cl_lastquakeentity = num;
83         s.number = num;
84         s.time = cl.mtime[0];
85         s.flags = 0;
86         if (bits & U_MODEL)             s.modelindex = (s.modelindex & 0xFF00) | MSG_ReadByte();
87         if (bits & U_FRAME)             s.frame = (s.frame & 0xFF00) | MSG_ReadByte();
88         if (bits & U_COLORMAP)  s.colormap = MSG_ReadByte();
89         if (bits & U_SKIN)              s.skin = MSG_ReadByte();
90         if (bits & U_EFFECTS)   s.effects = (s.effects & 0xFF00) | MSG_ReadByte();
91         if (bits & U_ORIGIN1)   s.origin[0] = MSG_ReadCoord(cl.protocol);
92         if (bits & U_ANGLE1)    s.angles[0] = MSG_ReadAngle(cl.protocol);
93         if (bits & U_ORIGIN2)   s.origin[1] = MSG_ReadCoord(cl.protocol);
94         if (bits & U_ANGLE2)    s.angles[1] = MSG_ReadAngle(cl.protocol);
95         if (bits & U_ORIGIN3)   s.origin[2] = MSG_ReadCoord(cl.protocol);
96         if (bits & U_ANGLE3)    s.angles[2] = MSG_ReadAngle(cl.protocol);
97         if (bits & U_STEP)              s.flags |= RENDER_STEP;
98         if (bits & U_ALPHA)             s.alpha = MSG_ReadByte();
99         if (bits & U_SCALE)             s.scale = MSG_ReadByte();
100         if (bits & U_EFFECTS2)  s.effects = (s.effects & 0x00FF) | (MSG_ReadByte() << 8);
101         if (bits & U_GLOWSIZE)  s.glowsize = MSG_ReadByte();
102         if (bits & U_GLOWCOLOR) s.glowcolor = MSG_ReadByte();
103         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));}
104         if (bits & U_GLOWTRAIL) s.flags |= RENDER_GLOWTRAIL;
105         if (bits & U_FRAME2)    s.frame = (s.frame & 0x00FF) | (MSG_ReadByte() << 8);
106         if (bits & U_MODEL2)    s.modelindex = (s.modelindex & 0x00FF) | (MSG_ReadByte() << 8);
107         if (bits & U_VIEWMODEL) s.flags |= RENDER_VIEWMODEL;
108         if (bits & U_EXTERIORMODEL)     s.flags |= RENDER_EXTERIORMODEL;
109
110         // LordHavoc: to allow playback of the Nehahra movie
111         if (cl.protocol == PROTOCOL_NEHAHRAMOVIE && (bits & U_EXTEND1))
112         {
113                 // LordHavoc: evil format
114                 int i = MSG_ReadFloat();
115                 int j = MSG_ReadFloat() * 255.0f;
116                 if (i == 2)
117                 {
118                         i = MSG_ReadFloat();
119                         if (i)
120                                 s.effects |= EF_FULLBRIGHT;
121                 }
122                 if (j < 0)
123                         s.alpha = 0;
124                 else if (j == 0 || j >= 255)
125                         s.alpha = 255;
126                 else
127                         s.alpha = j;
128         }
129
130         ent->state_previous = ent->state_current;
131         ent->state_current = s;
132         if (ent->state_current.active)
133         {
134                 CL_MoveLerpEntityStates(ent);
135                 cl_entities_active[ent->state_current.number] = true;
136         }
137
138         if (msg_badread)
139                 Host_Error("EntityFrameQuake_ReadEntity: read error\n");
140 }
141
142 void EntityFrameQuake_ISeeDeadEntities(void)
143 {
144         int num, lastentity;
145         if (cl_lastquakeentity == 0)
146                 return;
147         lastentity = cl_lastquakeentity;
148         cl_lastquakeentity = 0;
149         for (num = 0;num <= lastentity;num++)
150         {
151                 if (cl_isquakeentity[num])
152                 {
153                         if (cl_entities_active[num] && cl_entities[num].state_current.time == cl.mtime[0])
154                         {
155                                 cl_isquakeentity[num] = true;
156                                 cl_lastquakeentity = num;
157                         }
158                         else
159                         {
160                                 cl_isquakeentity[num] = false;
161                                 cl_entities_active[num] = false;
162                                 cl_entities[num].state_current = defaultstate;
163                                 cl_entities[num].state_current.number = num;
164                         }
165                 }
166         }
167 }
168
169 void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int numstates, const entity_state_t *states)
170 {
171         const entity_state_t *s;
172         entity_state_t baseline;
173         int i, bits;
174         sizebuf_t buf;
175         qbyte data[128];
176
177         // prepare the buffer
178         memset(&buf, 0, sizeof(buf));
179         buf.data = data;
180         buf.maxsize = sizeof(data);
181
182         for (i = 0, s = states;i < numstates;i++, s++)
183         {
184                 // prepare the buffer
185                 SZ_Clear(&buf);
186
187 // send an update
188                 bits = 0;
189                 if (s->number >= 256)
190                         bits |= U_LONGENTITY;
191                 if (s->flags & RENDER_STEP)
192                         bits |= U_STEP;
193                 if (s->flags & RENDER_VIEWMODEL)
194                         bits |= U_VIEWMODEL;
195                 if (s->flags & RENDER_GLOWTRAIL)
196                         bits |= U_GLOWTRAIL;
197                 if (s->flags & RENDER_EXTERIORMODEL)
198                         bits |= U_EXTERIORMODEL;
199
200                 // LordHavoc: old stuff, but rewritten to have more exact tolerances
201                 baseline = sv.edicts[s->number].e->baseline;
202                 if (baseline.origin[0] != s->origin[0])
203                         bits |= U_ORIGIN1;
204                 if (baseline.origin[1] != s->origin[1])
205                         bits |= U_ORIGIN2;
206                 if (baseline.origin[2] != s->origin[2])
207                         bits |= U_ORIGIN3;
208                 if (baseline.angles[0] != s->angles[0])
209                         bits |= U_ANGLE1;
210                 if (baseline.angles[1] != s->angles[1])
211                         bits |= U_ANGLE2;
212                 if (baseline.angles[2] != s->angles[2])
213                         bits |= U_ANGLE3;
214                 if (baseline.colormap != s->colormap)
215                         bits |= U_COLORMAP;
216                 if (baseline.skin != s->skin)
217                         bits |= U_SKIN;
218                 if (baseline.frame != s->frame)
219                 {
220                         bits |= U_FRAME;
221                         if (s->frame & 0xFF00)
222                                 bits |= U_FRAME2;
223                 }
224                 if (baseline.effects != s->effects)
225                 {
226                         bits |= U_EFFECTS;
227                         if (s->effects & 0xFF00)
228                                 bits |= U_EFFECTS2;
229                 }
230                 if (baseline.modelindex != s->modelindex)
231                 {
232                         bits |= U_MODEL;
233                         if (s->modelindex & 0xFF00)
234                                 bits |= U_MODEL2;
235                 }
236                 if (baseline.alpha != s->alpha)
237                         bits |= U_ALPHA;
238                 if (baseline.scale != s->scale)
239                         bits |= U_SCALE;
240                 if (baseline.glowsize != s->glowsize)
241                         bits |= U_GLOWSIZE;
242                 if (baseline.glowcolor != s->glowcolor)
243                         bits |= U_GLOWCOLOR;
244
245                 // if extensions are disabled, clear the relevant update flags
246                 if (sv.netquakecompatible)
247                         bits &= 0x7FFF;
248
249                 // write the message
250                 if (bits >= 16777216)
251                         bits |= U_EXTEND2;
252                 if (bits >= 65536)
253                         bits |= U_EXTEND1;
254                 if (bits >= 256)
255                         bits |= U_MOREBITS;
256                 bits |= U_SIGNAL;
257
258                 MSG_WriteByte (&buf, bits);
259                 if (bits & U_MOREBITS)          MSG_WriteByte(&buf, bits>>8);
260                 if (bits & U_EXTEND1)           MSG_WriteByte(&buf, bits>>16);
261                 if (bits & U_EXTEND2)           MSG_WriteByte(&buf, bits>>24);
262                 if (bits & U_LONGENTITY)        MSG_WriteShort(&buf, s->number);
263                 else                                            MSG_WriteByte(&buf, s->number);
264
265                 if (bits & U_MODEL)                     MSG_WriteByte(&buf, s->modelindex);
266                 if (bits & U_FRAME)                     MSG_WriteByte(&buf, s->frame);
267                 if (bits & U_COLORMAP)          MSG_WriteByte(&buf, s->colormap);
268                 if (bits & U_SKIN)                      MSG_WriteByte(&buf, s->skin);
269                 if (bits & U_EFFECTS)           MSG_WriteByte(&buf, s->effects);
270                 if (bits & U_ORIGIN1)           MSG_WriteCoord(&buf, s->origin[0], sv.protocol);
271                 if (bits & U_ANGLE1)            MSG_WriteAngle(&buf, s->angles[0], sv.protocol);
272                 if (bits & U_ORIGIN2)           MSG_WriteCoord(&buf, s->origin[1], sv.protocol);
273                 if (bits & U_ANGLE2)            MSG_WriteAngle(&buf, s->angles[1], sv.protocol);
274                 if (bits & U_ORIGIN3)           MSG_WriteCoord(&buf, s->origin[2], sv.protocol);
275                 if (bits & U_ANGLE3)            MSG_WriteAngle(&buf, s->angles[2], sv.protocol);
276                 if (bits & U_ALPHA)                     MSG_WriteByte(&buf, s->alpha);
277                 if (bits & U_SCALE)                     MSG_WriteByte(&buf, s->scale);
278                 if (bits & U_EFFECTS2)          MSG_WriteByte(&buf, s->effects >> 8);
279                 if (bits & U_GLOWSIZE)          MSG_WriteByte(&buf, s->glowsize);
280                 if (bits & U_GLOWCOLOR)         MSG_WriteByte(&buf, s->glowcolor);
281                 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);}
282                 if (bits & U_FRAME2)            MSG_WriteByte(&buf, s->frame >> 8);
283                 if (bits & U_MODEL2)            MSG_WriteByte(&buf, s->modelindex >> 8);
284
285                 // if the commit is full, we're done this frame
286                 if (msg->cursize + buf.cursize > msg->maxsize)
287                 {
288                         // next frame we will continue where we left off
289                         break;
290                 }
291                 // write the message to the packet
292                 SZ_Write(msg, buf.data, buf.cursize);
293         }
294 }
295
296 int EntityState_DeltaBits(const entity_state_t *o, const entity_state_t *n)
297 {
298         unsigned int bits;
299         // if o is not active, delta from default
300         if (!o->active)
301                 o = &defaultstate;
302         bits = 0;
303         if (fabs(n->origin[0] - o->origin[0]) > (1.0f / 256.0f))
304                 bits |= E_ORIGIN1;
305         if (fabs(n->origin[1] - o->origin[1]) > (1.0f / 256.0f))
306                 bits |= E_ORIGIN2;
307         if (fabs(n->origin[2] - o->origin[2]) > (1.0f / 256.0f))
308                 bits |= E_ORIGIN3;
309         if ((qbyte) (n->angles[0] * (256.0f / 360.0f)) != (qbyte) (o->angles[0] * (256.0f / 360.0f)))
310                 bits |= E_ANGLE1;
311         if ((qbyte) (n->angles[1] * (256.0f / 360.0f)) != (qbyte) (o->angles[1] * (256.0f / 360.0f)))
312                 bits |= E_ANGLE2;
313         if ((qbyte) (n->angles[2] * (256.0f / 360.0f)) != (qbyte) (o->angles[2] * (256.0f / 360.0f)))
314                 bits |= E_ANGLE3;
315         if ((n->modelindex ^ o->modelindex) & 0x00FF)
316                 bits |= E_MODEL1;
317         if ((n->modelindex ^ o->modelindex) & 0xFF00)
318                 bits |= E_MODEL2;
319         if ((n->frame ^ o->frame) & 0x00FF)
320                 bits |= E_FRAME1;
321         if ((n->frame ^ o->frame) & 0xFF00)
322                 bits |= E_FRAME2;
323         if ((n->effects ^ o->effects) & 0x00FF)
324                 bits |= E_EFFECTS1;
325         if ((n->effects ^ o->effects) & 0xFF00)
326                 bits |= E_EFFECTS2;
327         if (n->colormap != o->colormap)
328                 bits |= E_COLORMAP;
329         if (n->skin != o->skin)
330                 bits |= E_SKIN;
331         if (n->alpha != o->alpha)
332                 bits |= E_ALPHA;
333         if (n->scale != o->scale)
334                 bits |= E_SCALE;
335         if (n->glowsize != o->glowsize)
336                 bits |= E_GLOWSIZE;
337         if (n->glowcolor != o->glowcolor)
338                 bits |= E_GLOWCOLOR;
339         if (n->flags != o->flags)
340                 bits |= E_FLAGS;
341         if (n->tagindex != o->tagindex || n->tagentity != o->tagentity)
342                 bits |= E_TAGATTACHMENT;
343         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])
344                 bits |= E_LIGHT;
345         if (n->lightstyle != o->lightstyle)
346                 bits |= E_LIGHTSTYLE;
347         if (n->lightpflags != o->lightpflags)
348                 bits |= E_LIGHTPFLAGS;
349
350         if (bits)
351         {
352                 if (bits &  0xFF000000)
353                         bits |= 0x00800000;
354                 if (bits &  0x00FF0000)
355                         bits |= 0x00008000;
356                 if (bits &  0x0000FF00)
357                         bits |= 0x00000080;
358         }
359         return bits;
360 }
361
362 void EntityState_WriteExtendBits(sizebuf_t *msg, unsigned int bits)
363 {
364         MSG_WriteByte(msg, bits & 0xFF);
365         if (bits & 0x00000080)
366         {
367                 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
368                 if (bits & 0x00008000)
369                 {
370                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
371                         if (bits & 0x00800000)
372                                 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
373                 }
374         }
375 }
376
377 void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned int bits)
378 {
379         if (sv.protocol == PROTOCOL_DARKPLACES2)
380         {
381                 if (bits & E_ORIGIN1)
382                         MSG_WriteCoord16i(msg, ent->origin[0]);
383                 if (bits & E_ORIGIN2)
384                         MSG_WriteCoord16i(msg, ent->origin[1]);
385                 if (bits & E_ORIGIN3)
386                         MSG_WriteCoord16i(msg, ent->origin[2]);
387         }
388         else if (sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4 || sv.protocol == PROTOCOL_DARKPLACES5 || sv.protocol == PROTOCOL_DARKPLACES6)
389         {
390                 // LordHavoc: have to write flags first, as they can modify protocol
391                 if (bits & E_FLAGS)
392                         MSG_WriteByte(msg, ent->flags);
393                 if (ent->flags & RENDER_LOWPRECISION)
394                 {
395                         if (bits & E_ORIGIN1)
396                                 MSG_WriteCoord16i(msg, ent->origin[0]);
397                         if (bits & E_ORIGIN2)
398                                 MSG_WriteCoord16i(msg, ent->origin[1]);
399                         if (bits & E_ORIGIN3)
400                                 MSG_WriteCoord16i(msg, ent->origin[2]);
401                 }
402                 else
403                 {
404                         if (bits & E_ORIGIN1)
405                                 MSG_WriteCoord32f(msg, ent->origin[0]);
406                         if (bits & E_ORIGIN2)
407                                 MSG_WriteCoord32f(msg, ent->origin[1]);
408                         if (bits & E_ORIGIN3)
409                                 MSG_WriteCoord32f(msg, ent->origin[2]);
410                 }
411         }
412         if ((sv.protocol == PROTOCOL_DARKPLACES5 || sv.protocol == PROTOCOL_DARKPLACES6) && !(ent->flags & RENDER_LOWPRECISION))
413         {
414                 if (bits & E_ANGLE1)
415                         MSG_WriteAngle16i(msg, ent->angles[0]);
416                 if (bits & E_ANGLE2)
417                         MSG_WriteAngle16i(msg, ent->angles[1]);
418                 if (bits & E_ANGLE3)
419                         MSG_WriteAngle16i(msg, ent->angles[2]);
420         }
421         else
422         {
423                 if (bits & E_ANGLE1)
424                         MSG_WriteAngle8i(msg, ent->angles[0]);
425                 if (bits & E_ANGLE2)
426                         MSG_WriteAngle8i(msg, ent->angles[1]);
427                 if (bits & E_ANGLE3)
428                         MSG_WriteAngle8i(msg, ent->angles[2]);
429         }
430         if (bits & E_MODEL1)
431                 MSG_WriteByte(msg, ent->modelindex & 0xFF);
432         if (bits & E_MODEL2)
433                 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
434         if (bits & E_FRAME1)
435                 MSG_WriteByte(msg, ent->frame & 0xFF);
436         if (bits & E_FRAME2)
437                 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
438         if (bits & E_EFFECTS1)
439                 MSG_WriteByte(msg, ent->effects & 0xFF);
440         if (bits & E_EFFECTS2)
441                 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
442         if (bits & E_COLORMAP)
443                 MSG_WriteByte(msg, ent->colormap);
444         if (bits & E_SKIN)
445                 MSG_WriteByte(msg, ent->skin);
446         if (bits & E_ALPHA)
447                 MSG_WriteByte(msg, ent->alpha);
448         if (bits & E_SCALE)
449                 MSG_WriteByte(msg, ent->scale);
450         if (bits & E_GLOWSIZE)
451                 MSG_WriteByte(msg, ent->glowsize);
452         if (bits & E_GLOWCOLOR)
453                 MSG_WriteByte(msg, ent->glowcolor);
454         if (sv.protocol == PROTOCOL_DARKPLACES2)
455                 if (bits & E_FLAGS)
456                         MSG_WriteByte(msg, ent->flags);
457         if (bits & E_TAGATTACHMENT)
458         {
459                 MSG_WriteShort(msg, ent->tagentity);
460                 MSG_WriteByte(msg, ent->tagindex);
461         }
462         if (bits & E_LIGHT)
463         {
464                 MSG_WriteShort(msg, ent->light[0]);
465                 MSG_WriteShort(msg, ent->light[1]);
466                 MSG_WriteShort(msg, ent->light[2]);
467                 MSG_WriteShort(msg, ent->light[3]);
468         }
469         if (bits & E_LIGHTSTYLE)
470                 MSG_WriteByte(msg, ent->lightstyle);
471         if (bits & E_LIGHTPFLAGS)
472                 MSG_WriteByte(msg, ent->lightpflags);
473 }
474
475 void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
476 {
477         unsigned int bits;
478         if (ent->active)
479         {
480                 // entity is active, check for changes from the delta
481                 if ((bits = EntityState_DeltaBits(delta, ent)))
482                 {
483                         // write the update number, bits, and fields
484                         MSG_WriteShort(msg, ent->number);
485                         EntityState_WriteExtendBits(msg, bits);
486                         EntityState_WriteFields(ent, msg, bits);
487                 }
488         }
489         else
490         {
491                 // entity is inactive, check if the delta was active
492                 if (delta->active)
493                 {
494                         // write the remove number
495                         MSG_WriteShort(msg, ent->number | 0x8000);
496                 }
497         }
498 }
499
500 int EntityState_ReadExtendBits(void)
501 {
502         unsigned int bits;
503         bits = MSG_ReadByte();
504         if (bits & 0x00000080)
505         {
506                 bits |= MSG_ReadByte() << 8;
507                 if (bits & 0x00008000)
508                 {
509                         bits |= MSG_ReadByte() << 16;
510                         if (bits & 0x00800000)
511                                 bits |= MSG_ReadByte() << 24;
512                 }
513         }
514         return bits;
515 }
516
517 void EntityState_ReadFields(entity_state_t *e, unsigned int bits)
518 {
519         if (cl.protocol == PROTOCOL_DARKPLACES2)
520         {
521                 if (bits & E_ORIGIN1)
522                         e->origin[0] = MSG_ReadCoord16i();
523                 if (bits & E_ORIGIN2)
524                         e->origin[1] = MSG_ReadCoord16i();
525                 if (bits & E_ORIGIN3)
526                         e->origin[2] = MSG_ReadCoord16i();
527         }
528         else if (cl.protocol == PROTOCOL_DARKPLACES1 || cl.protocol == PROTOCOL_DARKPLACES3 || cl.protocol == PROTOCOL_DARKPLACES4 || cl.protocol == PROTOCOL_DARKPLACES5 || cl.protocol == PROTOCOL_DARKPLACES6)
529         {
530                 if (bits & E_FLAGS)
531                         e->flags = MSG_ReadByte();
532                 if (e->flags & RENDER_LOWPRECISION)
533                 {
534                         if (bits & E_ORIGIN1)
535                                 e->origin[0] = MSG_ReadCoord16i();
536                         if (bits & E_ORIGIN2)
537                                 e->origin[1] = MSG_ReadCoord16i();
538                         if (bits & E_ORIGIN3)
539                                 e->origin[2] = MSG_ReadCoord16i();
540                 }
541                 else
542                 {
543                         if (bits & E_ORIGIN1)
544                                 e->origin[0] = MSG_ReadCoord32f();
545                         if (bits & E_ORIGIN2)
546                                 e->origin[1] = MSG_ReadCoord32f();
547                         if (bits & E_ORIGIN3)
548                                 e->origin[2] = MSG_ReadCoord32f();
549                 }
550         }
551         else
552                 Host_Error("EntityState_ReadFields: unknown cl.protocol %i\n", cl.protocol);
553         if ((cl.protocol == PROTOCOL_DARKPLACES5 || cl.protocol == PROTOCOL_DARKPLACES6) && !(e->flags & RENDER_LOWPRECISION))
554         {
555                 if (bits & E_ANGLE1)
556                         e->angles[0] = MSG_ReadAngle16i();
557                 if (bits & E_ANGLE2)
558                         e->angles[1] = MSG_ReadAngle16i();
559                 if (bits & E_ANGLE3)
560                         e->angles[2] = MSG_ReadAngle16i();
561         }
562         else
563         {
564                 if (bits & E_ANGLE1)
565                         e->angles[0] = MSG_ReadAngle8i();
566                 if (bits & E_ANGLE2)
567                         e->angles[1] = MSG_ReadAngle8i();
568                 if (bits & E_ANGLE3)
569                         e->angles[2] = MSG_ReadAngle8i();
570         }
571         if (bits & E_MODEL1)
572                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
573         if (bits & E_MODEL2)
574                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
575         if (bits & E_FRAME1)
576                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
577         if (bits & E_FRAME2)
578                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
579         if (bits & E_EFFECTS1)
580                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
581         if (bits & E_EFFECTS2)
582                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
583         if (bits & E_COLORMAP)
584                 e->colormap = MSG_ReadByte();
585         if (bits & E_SKIN)
586                 e->skin = MSG_ReadByte();
587         if (bits & E_ALPHA)
588                 e->alpha = MSG_ReadByte();
589         if (bits & E_SCALE)
590                 e->scale = MSG_ReadByte();
591         if (bits & E_GLOWSIZE)
592                 e->glowsize = MSG_ReadByte();
593         if (bits & E_GLOWCOLOR)
594                 e->glowcolor = MSG_ReadByte();
595         if (cl.protocol == PROTOCOL_DARKPLACES2)
596                 if (bits & E_FLAGS)
597                         e->flags = MSG_ReadByte();
598         if (bits & E_TAGATTACHMENT)
599         {
600                 e->tagentity = (unsigned short) MSG_ReadShort();
601                 e->tagindex = MSG_ReadByte();
602         }
603         if (bits & E_LIGHT)
604         {
605                 e->light[0] = (unsigned short) MSG_ReadShort();
606                 e->light[1] = (unsigned short) MSG_ReadShort();
607                 e->light[2] = (unsigned short) MSG_ReadShort();
608                 e->light[3] = (unsigned short) MSG_ReadShort();
609         }
610         if (bits & E_LIGHTSTYLE)
611                 e->lightstyle = MSG_ReadByte();
612         if (bits & E_LIGHTPFLAGS)
613                 e->lightpflags = MSG_ReadByte();
614
615         if (developer_networkentities.integer >= 2)
616         {
617                 Con_Printf("ReadFields e%i", e->number);
618
619                 if (bits & E_ORIGIN1)
620                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
621                 if (bits & E_ORIGIN2)
622                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
623                 if (bits & E_ORIGIN3)
624                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
625                 if (bits & E_ANGLE1)
626                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
627                 if (bits & E_ANGLE2)
628                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
629                 if (bits & E_ANGLE3)
630                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
631                 if (bits & (E_MODEL1 | E_MODEL2))
632                         Con_Printf(" E_MODEL %i", e->modelindex);
633
634                 if (bits & (E_FRAME1 | E_FRAME2))
635                         Con_Printf(" E_FRAME %i", e->frame);
636                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
637                         Con_Printf(" E_EFFECTS %i", e->effects);
638                 if (bits & E_ALPHA)
639                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
640                 if (bits & E_SCALE)
641                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
642                 if (bits & E_COLORMAP)
643                         Con_Printf(" E_COLORMAP %i", e->colormap);
644                 if (bits & E_SKIN)
645                         Con_Printf(" E_SKIN %i", e->skin);
646
647                 if (bits & E_GLOWSIZE)
648                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
649                 if (bits & E_GLOWCOLOR)
650                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
651                 
652                 if (bits & E_LIGHT)
653                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
654                 if (bits & E_LIGHTPFLAGS)                       
655                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
656
657                 if (bits & E_TAGATTACHMENT)
658                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
659                 if (bits & E_LIGHTSTYLE)
660                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
661                 Con_Print("\n");
662         }
663 }
664
665 // (client and server) allocates a new empty database
666 entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
667 {
668         return Mem_Alloc(mempool, sizeof(entityframe_database_t));
669 }
670
671 // (client and server) frees the database
672 void EntityFrame_FreeDatabase(entityframe_database_t *d)
673 {
674         Mem_Free(d);
675 }
676
677 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
678 void EntityFrame_ClearDatabase(entityframe_database_t *d)
679 {
680         memset(d, 0, sizeof(*d));
681 }
682
683 // (server and client) removes frames older than 'frame' from database
684 void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
685 {
686         int i;
687         d->ackframenum = frame;
688         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
689         // ignore outdated frame acks (out of order packets)
690         if (i == 0)
691                 return;
692         d->numframes -= i;
693         // if some queue is left, slide it down to beginning of array
694         if (d->numframes)
695                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
696 }
697
698 // (server) clears frame, to prepare for adding entities
699 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
700 {
701         f->time = 0;
702         f->framenum = framenum;
703         f->numentities = 0;
704         if (eye == NULL)
705                 VectorClear(f->eye);
706         else
707                 VectorCopy(eye, f->eye);
708 }
709
710 // (server and client) reads a frame from the database
711 void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
712 {
713         int i, n;
714         EntityFrame_Clear(f, NULL, -1);
715         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
716         if (i < d->numframes && framenum == d->frames[i].framenum)
717         {
718                 f->framenum = framenum;
719                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
720                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
721                 if (n > f->numentities)
722                         n = f->numentities;
723                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
724                 if (f->numentities > n)
725                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
726                 VectorCopy(d->eye, f->eye);
727         }
728 }
729
730 // (server and client) adds a entity_frame to the database, for future reference
731 void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
732 {
733         int n, e;
734         entity_frameinfo_t *info;
735
736         VectorCopy(eye, d->eye);
737
738         // figure out how many entity slots are used already
739         if (d->numframes)
740         {
741                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
742                 if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
743                 {
744                         // ran out of room, dump database
745                         EntityFrame_ClearDatabase(d);
746                 }
747         }
748
749         info = &d->frames[d->numframes];
750         info->framenum = framenum;
751         e = -1000;
752         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
753         for (n = 0;n <= d->numframes;n++)
754         {
755                 if (e >= d->frames[n].framenum)
756                 {
757                         if (e == framenum)
758                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
759                         else
760                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
761                         return;
762                 }
763                 e = d->frames[n].framenum;
764         }
765         // if database still has frames after that...
766         if (d->numframes)
767                 info->firstentity = d->frames[d->numframes - 1].endentity;
768         else
769                 info->firstentity = 0;
770         info->endentity = info->firstentity + numentities;
771         d->numframes++;
772
773         n = info->firstentity % MAX_ENTITY_DATABASE;
774         e = MAX_ENTITY_DATABASE - n;
775         if (e > numentities)
776                 e = numentities;
777         memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
778         if (numentities > e)
779                 memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
780 }
781
782 // (server) writes a frame to network stream
783 static entity_frame_t deltaframe; // FIXME?
784 void EntityFrame_WriteFrame(sizebuf_t *msg, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
785 {
786         int i, onum, number;
787         entity_frame_t *o = &deltaframe;
788         const entity_state_t *ent, *delta;
789         vec3_t eye;
790
791         d->latestframenum++;
792
793         VectorClear(eye);
794         for (i = 0;i < numstates;i++)
795         {
796                 if (states[i].number == viewentnum)
797                 {
798                         VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
799                         break;
800                 }
801         }
802
803         EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
804
805         EntityFrame_FetchFrame(d, d->ackframenum, o);
806
807         MSG_WriteByte (msg, svc_entities);
808         MSG_WriteLong (msg, o->framenum);
809         MSG_WriteLong (msg, d->latestframenum);
810         MSG_WriteFloat (msg, eye[0]);
811         MSG_WriteFloat (msg, eye[1]);
812         MSG_WriteFloat (msg, eye[2]);
813
814         onum = 0;
815         for (i = 0;i < numstates;i++)
816         {
817                 ent = states + i;
818                 number = ent->number;
819                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
820                 {
821                         // write remove message
822                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
823                 }
824                 if (onum < o->numentities && (o->entitydata[onum].number == number))
825                 {
826                         // delta from previous frame
827                         delta = o->entitydata + onum;
828                         // advance to next entity in delta frame
829                         onum++;
830                 }
831                 else
832                 {
833                         // delta from defaults
834                         delta = &defaultstate;
835                 }
836                 EntityState_WriteUpdate(ent, msg, delta);
837         }
838         for (;onum < o->numentities;onum++)
839         {
840                 // write remove message
841                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
842         }
843         MSG_WriteShort(msg, 0xFFFF);
844 }
845
846 // (client) reads a frame from network stream
847 static entity_frame_t framedata; // FIXME?
848 void EntityFrame_CL_ReadFrame(void)
849 {
850         int i, number, removed;
851         entity_frame_t *f = &framedata, *delta = &deltaframe;
852         entity_state_t *e, *old, *oldend;
853         entity_t *ent;
854         entityframe_database_t *d;
855         if (!cl.entitydatabase)
856                 cl.entitydatabase = EntityFrame_AllocDatabase(cl_entities_mempool);
857         d = cl.entitydatabase;
858
859         EntityFrame_Clear(f, NULL, -1);
860
861         // read the frame header info
862         f->time = cl.mtime[0];
863         number = MSG_ReadLong();
864         for (i = 0;i < LATESTFRAMENUMS-1;i++)
865                 cl.latestframenums[i] = cl.latestframenums[i+1];
866         cl.latestframenums[LATESTFRAMENUMS-1] = f->framenum = MSG_ReadLong();
867         f->eye[0] = MSG_ReadFloat();
868         f->eye[1] = MSG_ReadFloat();
869         f->eye[2] = MSG_ReadFloat();
870         EntityFrame_AckFrame(d, number);
871         EntityFrame_FetchFrame(d, number, delta);
872         old = delta->entitydata;
873         oldend = old + delta->numentities;
874         // read entities until we hit the magic 0xFFFF end tag
875         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
876         {
877                 if (msg_badread)
878                         Host_Error("EntityFrame_Read: read error\n");
879                 removed = number & 0x8000;
880                 number &= 0x7FFF;
881                 if (number >= MAX_EDICTS)
882                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)\n", number, MAX_EDICTS);
883
884                 // seek to entity, while copying any skipped entities (assume unchanged)
885                 while (old < oldend && old->number < number)
886                 {
887                         if (f->numentities >= MAX_ENTITY_DATABASE)
888                                 Host_Error("EntityFrame_Read: entity list too big\n");
889                         f->entitydata[f->numentities] = *old++;
890                         f->entitydata[f->numentities++].time = cl.mtime[0];
891                 }
892                 if (removed)
893                 {
894                         if (old < oldend && old->number == number)
895                                 old++;
896                         else
897                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
898                 }
899                 else
900                 {
901                         if (f->numentities >= MAX_ENTITY_DATABASE)
902                                 Host_Error("EntityFrame_Read: entity list too big\n");
903
904                         // reserve this slot
905                         e = f->entitydata + f->numentities++;
906
907                         if (old < oldend && old->number == number)
908                         {
909                                 // delta from old entity
910                                 *e = *old++;
911                         }
912                         else
913                         {
914                                 // delta from defaults
915                                 *e = defaultstate;
916                         }
917
918                         cl_entities_active[number] = true;
919                         e->active = true;
920                         e->time = cl.mtime[0];
921                         e->number = number;
922                         EntityState_ReadFields(e, EntityState_ReadExtendBits());
923                 }
924         }
925         while (old < oldend)
926         {
927                 if (f->numentities >= MAX_ENTITY_DATABASE)
928                         Host_Error("EntityFrame_Read: entity list too big\n");
929                 f->entitydata[f->numentities] = *old++;
930                 f->entitydata[f->numentities++].time = cl.mtime[0];
931         }
932         EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
933
934         memset(cl_entities_active, 0, cl_max_entities * sizeof(qbyte));
935         number = 1;
936         for (i = 0;i < f->numentities;i++)
937         {
938                 for (;number < f->entitydata[i].number;number++)
939                 {
940                         if (cl_entities_active[number])
941                         {
942                                 cl_entities_active[number] = false;
943                                 cl_entities[number].state_current.active = false;
944                         }
945                 }
946                 // update the entity
947                 ent = &cl_entities[number];
948                 ent->state_previous = ent->state_current;
949                 ent->state_current = f->entitydata[i];
950                 CL_MoveLerpEntityStates(ent);
951                 // the entity lives again...
952                 cl_entities_active[number] = true;
953                 number++;
954         }
955         for (;number < cl_max_entities;number++)
956         {
957                 if (cl_entities_active[number])
958                 {
959                         cl_entities_active[number] = false;
960                         cl_entities[number].state_current.active = false;
961                 }
962         }
963 }
964
965
966 // (client) returns the frame number of the most recent frame recieved
967 int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
968 {
969         if (d->numframes)
970                 return d->frames[d->numframes - 1].framenum;
971         else
972                 return -1;
973 }
974
975
976
977
978
979
980 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
981 {
982         if (d->maxreferenceentities <= number)
983         {
984                 int oldmax = d->maxreferenceentities;
985                 entity_state_t *oldentity = d->referenceentity;
986                 d->maxreferenceentities = (number + 15) & ~7;
987                 d->referenceentity = Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
988                 if (oldentity)
989                 {
990                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
991                         Mem_Free(oldentity);
992                 }
993                 // clear the newly created entities
994                 for (;oldmax < d->maxreferenceentities;oldmax++)
995                 {
996                         d->referenceentity[oldmax] = defaultstate;
997                         d->referenceentity[oldmax].number = oldmax;
998                 }
999         }
1000         return d->referenceentity + number;
1001 }
1002
1003 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
1004 {
1005         // resize commit's entity list if full
1006         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
1007         {
1008                 entity_state_t *oldentity = d->currentcommit->entity;
1009                 d->currentcommit->maxentities += 8;
1010                 d->currentcommit->entity = Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
1011                 if (oldentity)
1012                 {
1013                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
1014                         Mem_Free(oldentity);
1015                 }
1016         }
1017         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
1018 }
1019
1020 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
1021 {
1022         entityframe4_database_t *d;
1023         d = Mem_Alloc(pool, sizeof(*d));
1024         d->mempool = pool;
1025         EntityFrame4_ResetDatabase(d);
1026         return d;
1027 }
1028
1029 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
1030 {
1031         int i;
1032         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1033                 if (d->commit[i].entity)
1034                         Mem_Free(d->commit[i].entity);
1035         if (d->referenceentity)
1036                 Mem_Free(d->referenceentity);
1037         Mem_Free(d);
1038 }
1039
1040 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
1041 {
1042         int i;
1043         d->referenceframenum = -1;
1044         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1045                 d->commit[i].numentities = 0;
1046         for (i = 0;i < d->maxreferenceentities;i++)
1047                 d->referenceentity[i] = defaultstate;
1048 }
1049
1050 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
1051 {
1052         int i, j, found;
1053         entity_database4_commit_t *commit;
1054         if (framenum == -1)
1055         {
1056                 // reset reference, but leave commits alone
1057                 d->referenceframenum = -1;
1058                 for (i = 0;i < d->maxreferenceentities;i++)
1059                         d->referenceentity[i] = defaultstate;
1060                 // if this is the server, remove commits
1061                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1062                                 commit->numentities = 0;
1063                 found = true;
1064         }
1065         else if (d->referenceframenum == framenum)
1066                 found = true;
1067         else
1068         {
1069                 found = false;
1070                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1071                 {
1072                         if (commit->numentities && commit->framenum <= framenum)
1073                         {
1074                                 if (commit->framenum == framenum)
1075                                 {
1076                                         found = true;
1077                                         d->referenceframenum = framenum;
1078                                         if (developer_networkentities.integer >= 3)
1079                                         {
1080                                                 for (j = 0;j < commit->numentities;j++)
1081                                                 {
1082                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
1083                                                         if (commit->entity[j].active != s->active)
1084                                                         {
1085                                                                 if (commit->entity[j].active)
1086                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1087                                                                 else
1088                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1089                                                         }
1090                                                         *s = commit->entity[j];
1091                                                 }
1092                                         }
1093                                         else
1094                                                 for (j = 0;j < commit->numentities;j++)
1095                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
1096                                 }
1097                                 commit->numentities = 0;
1098                         }
1099                 }
1100         }
1101         if (developer_networkentities.integer >= 1)
1102         {
1103                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
1104                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1105                         if (d->commit[i].numentities)
1106                                 Con_Printf(" %i", d->commit[i].framenum);
1107                 Con_Print("\n");
1108         }
1109         return found;
1110 }
1111
1112 void EntityFrame4_CL_ReadFrame(void)
1113 {
1114         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
1115         entity_state_t *s;
1116         entityframe4_database_t *d;
1117         if (!cl.entitydatabase4)
1118                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cl_entities_mempool);
1119         d = cl.entitydatabase4;
1120         // read the number of the frame this refers to
1121         referenceframenum = MSG_ReadLong();
1122         // read the number of this frame
1123         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1124                 cl.latestframenums[i] = cl.latestframenums[i+1];
1125         cl.latestframenums[LATESTFRAMENUMS-1] = framenum = MSG_ReadLong();
1126         // read the start number
1127         enumber = (unsigned short) MSG_ReadShort();
1128         if (developer_networkentities.integer >= 1)
1129         {
1130                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
1131                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1132                         if (d->commit[i].numentities)
1133                                 Con_Printf(" %i", d->commit[i].framenum);
1134                 Con_Print("\n");
1135         }
1136         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
1137         {
1138                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
1139                 skip = true;
1140         }
1141         d->currentcommit = NULL;
1142         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1143         {
1144                 if (!d->commit[i].numentities)
1145                 {
1146                         d->currentcommit = d->commit + i;
1147                         d->currentcommit->framenum = framenum;
1148                         d->currentcommit->numentities = 0;
1149                 }
1150         }
1151         if (d->currentcommit == NULL)
1152         {
1153                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
1154                 skip = true;
1155         }
1156         done = false;
1157         while (!done && !msg_badread)
1158         {
1159                 // read the number of the modified entity
1160                 // (gaps will be copied unmodified)
1161                 n = (unsigned short)MSG_ReadShort();
1162                 if (n == 0x8000)
1163                 {
1164                         // no more entities in this update, but we still need to copy the
1165                         // rest of the reference entities (final gap)
1166                         done = true;
1167                         // read end of range number, then process normally
1168                         n = (unsigned short)MSG_ReadShort();
1169                 }
1170                 // high bit means it's a remove message
1171                 cnumber = n & 0x7FFF;
1172                 // add one (the changed one) if not done
1173                 stopnumber = cnumber + !done;
1174                 // process entities in range from the last one to the changed one
1175                 for (;enumber < stopnumber;enumber++)
1176                 {
1177                         if (skip)
1178                         {
1179                                 if (enumber == cnumber && (n & 0x8000) == 0)
1180                                 {
1181                                         entity_state_t tempstate;
1182                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
1183                                 }
1184                                 continue;
1185                         }
1186                         // slide the current into the previous slot
1187                         cl_entities[enumber].state_previous = cl_entities[enumber].state_current;
1188                         // copy a new current from reference database
1189                         cl_entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
1190                         s = &cl_entities[enumber].state_current;
1191                         // if this is the one to modify, read more data...
1192                         if (enumber == cnumber)
1193                         {
1194                                 if (n & 0x8000)
1195                                 {
1196                                         // simply removed
1197                                         if (developer_networkentities.integer >= 2)
1198                                                 Con_Printf("entity %i: remove\n", enumber);
1199                                         *s = defaultstate;
1200                                 }
1201                                 else
1202                                 {
1203                                         // read the changes
1204                                         if (developer_networkentities.integer >= 2)
1205                                                 Con_Printf("entity %i: update\n", enumber);
1206                                         s->active = true;
1207                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
1208                                 }
1209                         }
1210                         else if (developer_networkentities.integer >= 4)
1211                                 Con_Printf("entity %i: copy\n", enumber);
1212                         // set the cl_entities_active flag
1213                         cl_entities_active[enumber] = s->active;
1214                         // set the update time
1215                         s->time = cl.mtime[0];
1216                         // fix the number (it gets wiped occasionally by copying from defaultstate)
1217                         s->number = enumber;
1218                         // check if we need to update the lerp stuff
1219                         if (s->active)
1220                                 CL_MoveLerpEntityStates(&cl_entities[enumber]);
1221                         // add this to the commit entry whether it is modified or not
1222                         if (d->currentcommit)
1223                                 EntityFrame4_AddCommitEntity(d, &cl_entities[enumber].state_current);
1224                         // print extra messages if desired
1225                         if (developer_networkentities.integer >= 2 && cl_entities[enumber].state_current.active != cl_entities[enumber].state_previous.active)
1226                         {
1227                                 if (cl_entities[enumber].state_current.active)
1228                                         Con_Printf("entity #%i has become active\n", enumber);
1229                                 else if (cl_entities[enumber].state_previous.active)
1230                                         Con_Printf("entity #%i has become inactive\n", enumber);
1231                         }
1232                 }
1233         }
1234         d->currentcommit = NULL;
1235         if (skip)
1236                 EntityFrame4_ResetDatabase(d);
1237 }
1238
1239 void EntityFrame4_WriteFrame(sizebuf_t *msg, entityframe4_database_t *d, int numstates, const entity_state_t *states)
1240 {
1241         const entity_state_t *e, *s;
1242         entity_state_t inactiveentitystate;
1243         int i, n, startnumber;
1244         sizebuf_t buf;
1245         qbyte data[128];
1246
1247         // if there isn't enough space to accomplish anything, skip it
1248         if (msg->cursize + 24 > msg->maxsize)
1249                 return;
1250
1251         // prepare the buffer
1252         memset(&buf, 0, sizeof(buf));
1253         buf.data = data;
1254         buf.maxsize = sizeof(data);
1255
1256         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1257                 if (!d->commit[i].numentities)
1258                         break;
1259         // if commit buffer full, just don't bother writing an update this frame
1260         if (i == MAX_ENTITY_HISTORY)
1261                 return;
1262         d->currentcommit = d->commit + i;
1263
1264         // this state's number gets played around with later
1265         inactiveentitystate = defaultstate;
1266
1267         d->currentcommit->numentities = 0;
1268         d->currentcommit->framenum = ++d->latestframenumber;
1269         MSG_WriteByte(msg, svc_entities);
1270         MSG_WriteLong(msg, d->referenceframenum);
1271         MSG_WriteLong(msg, d->currentcommit->framenum);
1272         if (developer_networkentities.integer >= 1)
1273         {
1274                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
1275                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1276                         if (d->commit[i].numentities)
1277                                 Con_Printf(" %i", d->commit[i].framenum);
1278                 Con_Print(")\n");
1279         }
1280         if (d->currententitynumber >= sv.max_edicts)
1281                 startnumber = 1;
1282         else
1283                 startnumber = bound(1, d->currententitynumber, sv.max_edicts - 1);
1284         MSG_WriteShort(msg, startnumber);
1285         // reset currententitynumber so if the loop does not break it we will
1286         // start at beginning next frame (if it does break, it will set it)
1287         d->currententitynumber = 1;
1288         for (i = 0, n = startnumber;n < sv.max_edicts;n++)
1289         {
1290                 // find the old state to delta from
1291                 e = EntityFrame4_GetReferenceEntity(d, n);
1292                 // prepare the buffer
1293                 SZ_Clear(&buf);
1294                 // entity exists, build an update (if empty there is no change)
1295                 // find the state in the list
1296                 for (;i < numstates && states[i].number < n;i++);
1297                 // make the message
1298                 s = states + i;
1299                 if (s->number == n)
1300                 {
1301                         // build the update
1302                         EntityState_WriteUpdate(s, &buf, e);
1303                 }
1304                 else
1305                 {
1306                         inactiveentitystate.number = n;
1307                         s = &inactiveentitystate;
1308                         if (e->active)
1309                         {
1310                                 // entity used to exist but doesn't anymore, send remove
1311                                 MSG_WriteShort(&buf, n | 0x8000);
1312                         }
1313                 }
1314                 // if the commit is full, we're done this frame
1315                 if (msg->cursize + buf.cursize > msg->maxsize - 4)
1316                 {
1317                         // next frame we will continue where we left off
1318                         break;
1319                 }
1320                 // add the entity to the commit
1321                 EntityFrame4_AddCommitEntity(d, s);
1322                 // if the message is empty, skip out now
1323                 if (buf.cursize)
1324                 {
1325                         // write the message to the packet
1326                         SZ_Write(msg, buf.data, buf.cursize);
1327                 }
1328         }
1329         d->currententitynumber = n;
1330
1331         // remove world message (invalid, and thus a good terminator)
1332         MSG_WriteShort(msg, 0x8000);
1333         // write the number of the end entity
1334         MSG_WriteShort(msg, d->currententitynumber);
1335         // just to be sure
1336         d->currentcommit = NULL;
1337 }
1338
1339
1340
1341
1342 #define E5_PROTOCOL_PRIORITYLEVELS 32
1343
1344 entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
1345 {
1346         entityframe5_database_t *d;
1347         d = Mem_Alloc(pool, sizeof(*d));
1348         EntityFrame5_ResetDatabase(d);
1349         return d;
1350 }
1351
1352 void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
1353 {
1354         Mem_Free(d);
1355 }
1356
1357 void EntityFrame5_ResetDatabase(entityframe5_database_t *d)
1358 {
1359         int i;
1360         memset(d, 0, sizeof(*d));
1361         d->latestframenum = 0;
1362         for (i = 0;i < MAX_EDICTS;i++)
1363                 d->states[i] = defaultstate;
1364 }
1365
1366
1367 int EntityState5_Priority(entityframe5_database_t *d, entity_state_t *view, entity_state_t *s, int changedbits, int age)
1368 {
1369         int lowprecision, limit, priority;
1370         double distance;
1371         if (!changedbits)
1372                 return 0;
1373         if (!s->active/* && changedbits & E5_FULLUPDATE*/)
1374                 return E5_PROTOCOL_PRIORITYLEVELS - 1;
1375         // check whole attachment chain to judge relevance to player
1376         lowprecision = false;
1377         for (limit = 0;limit < 256;limit++)
1378         {
1379                 if (s == view)
1380                         return E5_PROTOCOL_PRIORITYLEVELS - 1;
1381                 if (s->flags & RENDER_VIEWMODEL)
1382                         return E5_PROTOCOL_PRIORITYLEVELS - 1;
1383                 if (s->flags & RENDER_LOWPRECISION)
1384                         lowprecision = true;
1385                 if (!s->tagentity)
1386                 {
1387                         if (VectorCompare(s->origin, view->origin))
1388                                 return E5_PROTOCOL_PRIORITYLEVELS - 1;
1389                         break;
1390                 }
1391                 s = d->states + s->tagentity;
1392         }
1393         if (limit >= 256)
1394                 Con_Printf("Protocol: Runaway loop recursing tagentity links on entity %i\n", s->number);
1395         // it's not a viewmodel for this client
1396         distance = VectorDistance(view->origin, s->origin);
1397         priority = (E5_PROTOCOL_PRIORITYLEVELS / 2) + age - (int)(distance * (E5_PROTOCOL_PRIORITYLEVELS / 16384.0f));
1398         if (lowprecision)
1399                 priority -= (E5_PROTOCOL_PRIORITYLEVELS / 4);
1400         //if (changedbits & E5_FULLUPDATE)
1401         //      priority += 4;
1402         //if (changedbits & (E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
1403         //      priority += 4;
1404         return (int) bound(1, priority, E5_PROTOCOL_PRIORITYLEVELS - 1);
1405 }
1406
1407 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
1408 {
1409         unsigned int bits = 0;
1410         if (!s->active)
1411                 MSG_WriteShort(msg, number | 0x8000);
1412         else
1413         {
1414                 bits = changedbits;
1415                 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))
1416                         bits |= E5_ORIGIN32;
1417                 if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
1418                         bits |= E5_ANGLES16;
1419                 if ((bits & E5_MODEL) && s->modelindex >= 256)
1420                         bits |= E5_MODEL16;
1421                 if ((bits & E5_FRAME) && s->frame >= 256)
1422                         bits |= E5_FRAME16;
1423                 if (bits & E5_EFFECTS)
1424                 {
1425                         if (s->effects >= 65536)
1426                                 bits |= E5_EFFECTS32;
1427                         else if (s->effects >= 256)
1428                                 bits |= E5_EFFECTS16;
1429                 }
1430                 if (bits >= 256)
1431                         bits |= E5_EXTEND1;
1432                 if (bits >= 65536)
1433                         bits |= E5_EXTEND2;
1434                 if (bits >= 16777216)
1435                         bits |= E5_EXTEND3;
1436                 MSG_WriteShort(msg, number);
1437                 MSG_WriteByte(msg, bits & 0xFF);
1438                 if (bits & E5_EXTEND1)
1439                         MSG_WriteByte(msg, (bits >> 8) & 0xFF);
1440                 if (bits & E5_EXTEND2)
1441                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
1442                 if (bits & E5_EXTEND3)
1443                         MSG_WriteByte(msg, (bits >> 24) & 0xFF);
1444                 if (bits & E5_FLAGS)
1445                         MSG_WriteByte(msg, s->flags);
1446                 if (bits & E5_ORIGIN)
1447                 {
1448                         if (bits & E5_ORIGIN32)
1449                         {
1450                                 MSG_WriteCoord32f(msg, s->origin[0]);
1451                                 MSG_WriteCoord32f(msg, s->origin[1]);
1452                                 MSG_WriteCoord32f(msg, s->origin[2]);
1453                         }
1454                         else
1455                         {
1456                                 MSG_WriteCoord13i(msg, s->origin[0]);
1457                                 MSG_WriteCoord13i(msg, s->origin[1]);
1458                                 MSG_WriteCoord13i(msg, s->origin[2]);
1459                         }
1460                 }
1461                 if (bits & E5_ANGLES)
1462                 {
1463                         if (bits & E5_ANGLES16)
1464                         {
1465                                 MSG_WriteAngle16i(msg, s->angles[0]);
1466                                 MSG_WriteAngle16i(msg, s->angles[1]);
1467                                 MSG_WriteAngle16i(msg, s->angles[2]);
1468                         }
1469                         else
1470                         {
1471                                 MSG_WriteAngle8i(msg, s->angles[0]);
1472                                 MSG_WriteAngle8i(msg, s->angles[1]);
1473                                 MSG_WriteAngle8i(msg, s->angles[2]);
1474                         }
1475                 }
1476                 if (bits & E5_MODEL)
1477                 {
1478                         if (bits & E5_MODEL16)
1479                                 MSG_WriteShort(msg, s->modelindex);
1480                         else
1481                                 MSG_WriteByte(msg, s->modelindex);
1482                 }
1483                 if (bits & E5_FRAME)
1484                 {
1485                         if (bits & E5_FRAME16)
1486                                 MSG_WriteShort(msg, s->frame);
1487                         else
1488                                 MSG_WriteByte(msg, s->frame);
1489                 }
1490                 if (bits & E5_SKIN)
1491                         MSG_WriteByte(msg, s->skin);
1492                 if (bits & E5_EFFECTS)
1493                 {
1494                         if (bits & E5_EFFECTS32)
1495                                 MSG_WriteLong(msg, s->effects);
1496                         else if (bits & E5_EFFECTS16)
1497                                 MSG_WriteShort(msg, s->effects);
1498                         else
1499                                 MSG_WriteByte(msg, s->effects);
1500                 }
1501                 if (bits & E5_ALPHA)
1502                         MSG_WriteByte(msg, s->alpha);
1503                 if (bits & E5_SCALE)
1504                         MSG_WriteByte(msg, s->scale);
1505                 if (bits & E5_COLORMAP)
1506                         MSG_WriteByte(msg, s->colormap);
1507                 if (bits & E5_ATTACHMENT)
1508                 {
1509                         MSG_WriteShort(msg, s->tagentity);
1510                         MSG_WriteByte(msg, s->tagindex);
1511                 }
1512                 if (bits & E5_LIGHT)
1513                 {
1514                         MSG_WriteShort(msg, s->light[0]);
1515                         MSG_WriteShort(msg, s->light[1]);
1516                         MSG_WriteShort(msg, s->light[2]);
1517                         MSG_WriteShort(msg, s->light[3]);
1518                         MSG_WriteByte(msg, s->lightstyle);
1519                         MSG_WriteByte(msg, s->lightpflags);
1520                 }
1521                 if (bits & E5_GLOW)
1522                 {
1523                         MSG_WriteByte(msg, s->glowsize);
1524                         MSG_WriteByte(msg, s->glowcolor);
1525                 }
1526                 if (bits & E5_COLORMOD)
1527                 {
1528                         MSG_WriteByte(msg, s->colormod[0]);
1529                         MSG_WriteByte(msg, s->colormod[1]);
1530                         MSG_WriteByte(msg, s->colormod[2]);
1531                 }
1532         }
1533 }
1534
1535 void EntityState5_ReadUpdate(entity_state_t *s)
1536 {
1537         int bits;
1538         bits = MSG_ReadByte();
1539         if (bits & E5_EXTEND1)
1540         {
1541                 bits |= MSG_ReadByte() << 8;
1542                 if (bits & E5_EXTEND2)
1543                 {
1544                         bits |= MSG_ReadByte() << 16;
1545                         if (bits & E5_EXTEND3)
1546                                 bits |= MSG_ReadByte() << 24;
1547                 }
1548         }
1549         if (bits & E5_FULLUPDATE)
1550         {
1551                 *s = defaultstate;
1552                 s->active = true;
1553         }
1554         if (bits & E5_FLAGS)
1555                 s->flags = MSG_ReadByte();
1556         if (bits & E5_ORIGIN)
1557         {
1558                 if (bits & E5_ORIGIN32)
1559                 {
1560                         s->origin[0] = MSG_ReadCoord32f();
1561                         s->origin[1] = MSG_ReadCoord32f();
1562                         s->origin[2] = MSG_ReadCoord32f();
1563                 }
1564                 else
1565                 {
1566                         s->origin[0] = MSG_ReadCoord13i();
1567                         s->origin[1] = MSG_ReadCoord13i();
1568                         s->origin[2] = MSG_ReadCoord13i();
1569                 }
1570         }
1571         if (bits & E5_ANGLES)
1572         {
1573                 if (bits & E5_ANGLES16)
1574                 {
1575                         s->angles[0] = MSG_ReadAngle16i(); 
1576                         s->angles[1] = MSG_ReadAngle16i(); 
1577                         s->angles[2] = MSG_ReadAngle16i(); 
1578                 }
1579                 else
1580                 {
1581                         s->angles[0] = MSG_ReadAngle8i(); 
1582                         s->angles[1] = MSG_ReadAngle8i(); 
1583                         s->angles[2] = MSG_ReadAngle8i(); 
1584                 }
1585         }
1586         if (bits & E5_MODEL)
1587         {
1588                 if (bits & E5_MODEL16)
1589                         s->modelindex = (unsigned short) MSG_ReadShort();
1590                 else
1591                         s->modelindex = MSG_ReadByte();
1592         }
1593         if (bits & E5_FRAME)
1594         {
1595                 if (bits & E5_FRAME16)
1596                         s->frame = (unsigned short) MSG_ReadShort();
1597                 else
1598                         s->frame = MSG_ReadByte();
1599         }
1600         if (bits & E5_SKIN)
1601                 s->skin = MSG_ReadByte();
1602         if (bits & E5_EFFECTS)
1603         {
1604                 if (bits & E5_EFFECTS32)
1605                         s->effects = (unsigned int) MSG_ReadLong();
1606                 else if (bits & E5_EFFECTS16)
1607                         s->effects = (unsigned short) MSG_ReadShort();
1608                 else
1609                         s->effects = MSG_ReadByte();
1610         }
1611         if (bits & E5_ALPHA)
1612                 s->alpha = MSG_ReadByte();
1613         if (bits & E5_SCALE)
1614                 s->scale = MSG_ReadByte();
1615         if (bits & E5_COLORMAP)
1616                 s->colormap = MSG_ReadByte();
1617         if (bits & E5_ATTACHMENT)
1618         {
1619                 s->tagentity = (unsigned short) MSG_ReadShort();
1620                 s->tagindex = MSG_ReadByte();
1621         }
1622         if (bits & E5_LIGHT)
1623         {
1624                 s->light[0] = (unsigned short) MSG_ReadShort();
1625                 s->light[1] = (unsigned short) MSG_ReadShort();
1626                 s->light[2] = (unsigned short) MSG_ReadShort();
1627                 s->light[3] = (unsigned short) MSG_ReadShort();
1628                 s->lightstyle = MSG_ReadByte();
1629                 s->lightpflags = MSG_ReadByte();
1630         }
1631         if (bits & E5_GLOW)
1632         {
1633                 s->glowsize = MSG_ReadByte();
1634                 s->glowcolor = MSG_ReadByte();
1635         }
1636         if (bits & E5_COLORMOD)
1637         {
1638                 s->colormod[0] = MSG_ReadByte();
1639                 s->colormod[1] = MSG_ReadByte();
1640                 s->colormod[2] = MSG_ReadByte();
1641         }
1642
1643
1644         if (developer_networkentities.integer >= 2)
1645         {
1646                 Con_Printf("ReadFields e%i", s->number);
1647
1648                 if (bits & E5_ORIGIN)
1649                         Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
1650                 if (bits & E5_ANGLES)
1651                         Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
1652                 if (bits & E5_MODEL)
1653                         Con_Printf(" E5_MODEL %i", s->modelindex);
1654                 if (bits & E5_FRAME)
1655                         Con_Printf(" E5_FRAME %i", s->frame);
1656                 if (bits & E5_SKIN)
1657                         Con_Printf(" E5_SKIN %i", s->skin);
1658                 if (bits & E5_EFFECTS)
1659                         Con_Printf(" E5_EFFECTS %i", s->effects);
1660                 if (bits & E5_FLAGS)
1661                 {
1662                         Con_Printf(" E5_FLAGS %i (", s->flags);
1663                         if (s->flags & RENDER_STEP)
1664                                 Con_Print(" STEP");
1665                         if (s->flags & RENDER_GLOWTRAIL)
1666                                 Con_Print(" GLOWTRAIL");
1667                         if (s->flags & RENDER_VIEWMODEL)
1668                                 Con_Print(" VIEWMODEL");
1669                         if (s->flags & RENDER_EXTERIORMODEL)
1670                                 Con_Print(" EXTERIORMODEL");
1671                         if (s->flags & RENDER_LOWPRECISION)
1672                                 Con_Print(" LOWPRECISION");
1673                         if (s->flags & RENDER_COLORMAPPED)
1674                                 Con_Print(" COLORMAPPED");
1675                         if (s->flags & RENDER_SHADOW)
1676                                 Con_Print(" SHADOW");
1677                         if (s->flags & RENDER_LIGHT)
1678                                 Con_Print(" LIGHT");
1679                         Con_Print(")");
1680                 }
1681                 if (bits & E5_ALPHA)
1682                         Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
1683                 if (bits & E5_SCALE)
1684                         Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
1685                 if (bits & E5_COLORMAP)
1686                         Con_Printf(" E5_COLORMAP %i", s->colormap);
1687                 if (bits & E5_ATTACHMENT)
1688                         Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
1689                 if (bits & E5_LIGHT)
1690                         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);
1691                 if (bits & E5_GLOW)
1692                         Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
1693                 if (bits & E5_COLORMOD)
1694                         Con_Printf(" E5_COLORMOD %f:%f:%f", s->colormod[0] / 32.0f, s->colormod[1] / 32.0f, s->colormod[2] / 32.0f);
1695                 Con_Print("\n");
1696         }
1697 }
1698
1699 int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
1700 {
1701         unsigned int bits = 0;
1702         if (n->active)
1703         {
1704                 if (!o->active)
1705                         bits |= E5_FULLUPDATE;
1706                 if (!VectorCompare(o->origin, n->origin))
1707                         bits |= E5_ORIGIN;
1708                 if (!VectorCompare(o->angles, n->angles))
1709                         bits |= E5_ANGLES;
1710                 if (o->modelindex != n->modelindex)
1711                         bits |= E5_MODEL;
1712                 if (o->frame != n->frame)
1713                         bits |= E5_FRAME;
1714                 if (o->skin != n->skin)
1715                         bits |= E5_SKIN;
1716                 if (o->effects != n->effects)
1717                         bits |= E5_EFFECTS;
1718                 if (o->flags != n->flags)
1719                         bits |= E5_FLAGS;
1720                 if (o->alpha != n->alpha)
1721                         bits |= E5_ALPHA;
1722                 if (o->scale != n->scale)
1723                         bits |= E5_SCALE;
1724                 if (o->colormap != n->colormap)
1725                         bits |= E5_COLORMAP;
1726                 if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
1727                         bits |= E5_ATTACHMENT;
1728                 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)
1729                         bits |= E5_LIGHT;
1730                 if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
1731                         bits |= E5_GLOW;
1732                 if (o->colormod[0] != n->colormod[0] || o->colormod[1] != n->colormod[1] || o->colormod[2] != n->colormod[2])
1733                         bits |= E5_COLORMOD;
1734         }
1735         else
1736                 if (o->active)
1737                         bits |= E5_FULLUPDATE;
1738         return bits;
1739 }
1740
1741 void EntityFrame5_CL_ReadFrame(void)
1742 {
1743         int i, n, enumber;
1744         entity_t *ent;
1745         entity_state_t *s;
1746         // read the number of this frame to echo back in next input packet
1747         for (i = 0;i < LATESTFRAMENUMS-1;i++)
1748                 cl.latestframenums[i] = cl.latestframenums[i+1];
1749         cl.latestframenums[LATESTFRAMENUMS-1] = MSG_ReadLong();
1750         // read entity numbers until we find a 0x8000
1751         // (which would be remove world entity, but is actually a terminator)
1752         while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
1753         {
1754                 // get the entity number and look it up
1755                 enumber = n & 0x7FFF;
1756                 ent = cl_entities + enumber;
1757                 // slide the current into the previous slot
1758                 ent->state_previous = ent->state_current;
1759                 // read the update
1760                 s = &ent->state_current;
1761                 if (n & 0x8000)
1762                 {
1763                         // remove entity
1764                         *s = defaultstate;
1765                 }
1766                 else
1767                 {
1768                         // update entity
1769                         EntityState5_ReadUpdate(s);
1770                 }
1771                 // set the cl_entities_active flag
1772                 cl_entities_active[enumber] = s->active;
1773                 // set the update time
1774                 s->time = cl.mtime[0];
1775                 // fix the number (it gets wiped occasionally by copying from defaultstate)
1776                 s->number = enumber;
1777                 // check if we need to update the lerp stuff
1778                 if (s->active)
1779                         CL_MoveLerpEntityStates(&cl_entities[enumber]);
1780                 // print extra messages if desired
1781                 if (developer_networkentities.integer >= 2 && cl_entities[enumber].state_current.active != cl_entities[enumber].state_previous.active)
1782                 {
1783                         if (cl_entities[enumber].state_current.active)
1784                                 Con_Printf("entity #%i has become active\n", enumber);
1785                         else if (cl_entities[enumber].state_previous.active)
1786                                 Con_Printf("entity #%i has become inactive\n", enumber);
1787                 }
1788         }
1789 }
1790
1791 void EntityFrame5_LostFrame(entityframe5_database_t *d, int framenum, int viewentnum)
1792 {
1793         int i, j, k, l, bits;
1794         entityframe5_changestate_t *s, *s2;
1795         entityframe5_packetlog_t *p, *p2;
1796         qbyte statsdeltabits[(MAX_CL_STATS+7)/8]; 
1797         // scan for packets that were lost
1798         for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
1799         {
1800                 if (p->packetnumber && p->packetnumber <= framenum)
1801                 {
1802                         // packet was lost - merge deltabits into the main array so they
1803                         // will be re-sent, but only if there is no newer update of that
1804                         // bit in the logs (as those will arrive before this update)
1805                         for (j = 0, s = p->states;j < p->numstates;j++, s++)
1806                         {
1807                                 // check for any newer updates to this entity and mask off any
1808                                 // overlapping bits (we don't need to send something again if
1809                                 // it has already been sent more recently)
1810                                 bits = s->bits & ~d->deltabits[s->number];
1811                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
1812                                 {
1813                                         if (p2->packetnumber > framenum)
1814                                         {
1815                                                 for (l = 0, s2 = p2->states;l < p2->numstates;l++, s2++)
1816                                                 {
1817                                                         if (s2->number == s->number)
1818                                                         {
1819                                                                 bits &= ~s2->bits;
1820                                                                 break;
1821                                                         }
1822                                                 }
1823                                         }
1824                                 }
1825                                 // if the bits haven't all been cleared, there were some bits
1826                                 // lost with this packet, so set them again now
1827                                 if (bits)
1828                                 {
1829                                         d->deltabits[s->number] |= bits;
1830                                         d->priorities[s->number] = EntityState5_Priority(d, d->states + viewentnum, d->states + s->number, d->deltabits[s->number], d->latestframenum - d->updateframenum[s->number]);
1831                                 }
1832                         }
1833                         // mark lost stats
1834                         for (j = 0;j < MAX_CL_STATS;j++)
1835                         {
1836                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
1837                                         statsdeltabits[l] = p->statsdeltabits[l] & ~d->statsdeltabits[l];
1838                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS;k++, p2++)
1839                                         if (p2->packetnumber > framenum)
1840                                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
1841                                                         statsdeltabits[l] = p->statsdeltabits[l] & ~p2->statsdeltabits[l];
1842                                 for (l = 0;l < (MAX_CL_STATS+7)/8;l++)
1843                                         d->statsdeltabits[l] |= statsdeltabits[l];
1844                         }
1845                         // delete this packet log as it is now obsolete
1846                         p->packetnumber = 0;
1847                 }
1848         }
1849 }
1850
1851 void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
1852 {
1853         int i;
1854         // scan for packets made obsolete by this ack and delete them
1855         for (i = 0;i < ENTITYFRAME5_MAXPACKETLOGS;i++)
1856                 if (d->packetlog[i].packetnumber <= framenum)
1857                         d->packetlog[i].packetnumber = 0;
1858 }
1859
1860 int entityframe5_prioritychaincounts[E5_PROTOCOL_PRIORITYLEVELS];
1861 unsigned short entityframe5_prioritychains[E5_PROTOCOL_PRIORITYLEVELS][ENTITYFRAME5_MAXSTATES];
1862
1863 void EntityFrame5_WriteFrame(sizebuf_t *msg, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int *stats)
1864 {
1865         const entity_state_t *n;
1866         int i, num, l, framenum, packetlognumber, priority;
1867         sizebuf_t buf;
1868         qbyte data[128];
1869         entityframe5_packetlog_t *packetlog;
1870
1871         framenum = d->latestframenum + 1;
1872
1873         // if packet log is full, mark all frames as lost, this will cause
1874         // it to send the lost data again
1875         for (packetlognumber = 0;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++)
1876                 if (d->packetlog[packetlognumber].packetnumber == 0)
1877                         break;
1878         if (packetlognumber == ENTITYFRAME5_MAXPACKETLOGS)
1879         {
1880                 EntityFrame5_LostFrame(d, framenum, viewentnum);
1881                 packetlognumber = 0;
1882         }
1883
1884         // prepare the buffer
1885         memset(&buf, 0, sizeof(buf));
1886         buf.data = data;
1887         buf.maxsize = sizeof(data);
1888
1889         // detect changes in stats
1890         for (i = 0;i < MAX_CL_STATS;i++)
1891         {
1892                 if (d->stats[i] != stats[i])
1893                 {
1894                         d->statsdeltabits[i>>3] |= (1<<(i&7));
1895                         d->stats[i] = stats[i];
1896                 }
1897         }
1898
1899         // detect changes in states
1900         num = 0;
1901         for (i = 0, n = states;i < numstates;i++, n++)
1902         {
1903                 // mark gaps in entity numbering as removed entities
1904                 for (;num < n->number;num++)
1905                 {
1906                         // if the entity used to exist, clear it
1907                         if (CHECKPVSBIT(d->visiblebits, num))
1908                         {
1909                                 CLEARPVSBIT(d->visiblebits, num);
1910                                 d->deltabits[num] = E5_FULLUPDATE;
1911                                 d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
1912                                 d->states[num] = defaultstate;
1913                                 d->states[num].number = num;
1914                         }
1915                 }
1916                 // update the entity state data
1917                 if (!CHECKPVSBIT(d->visiblebits, num))
1918                 {
1919                         // entity just spawned in, don't let it completely hog priority
1920                         // because of being ancient on the first frame
1921                         d->updateframenum[num] = framenum;
1922                 }
1923                 SETPVSBIT(d->visiblebits, num);
1924                 d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
1925                 d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
1926                 d->states[num] = *n;
1927                 d->states[num].number = num;
1928                 // advance to next entity so the next iteration doesn't immediately remove it
1929                 num++;
1930         }
1931         // all remaining entities are dead
1932         for (;num < MAX_EDICTS;num++)
1933         {
1934                 if (CHECKPVSBIT(d->visiblebits, num))
1935                 {
1936                         CLEARPVSBIT(d->visiblebits, num);
1937                         d->deltabits[num] = E5_FULLUPDATE;
1938                         d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
1939                         d->states[num] = defaultstate;
1940                         d->states[num].number = num;
1941                 }
1942         }
1943
1944         // build lists of entities by priority level
1945         memset(entityframe5_prioritychaincounts, 0, sizeof(entityframe5_prioritychaincounts));
1946         l = 0;
1947         for (num = 0;num < MAX_EDICTS;num++)
1948         {
1949                 if (d->priorities[num])
1950                 {
1951                         l = num;
1952                         priority = d->priorities[num];
1953                         if (entityframe5_prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
1954                                 entityframe5_prioritychains[priority][entityframe5_prioritychaincounts[priority]++] = num;
1955                 }
1956         }
1957
1958         // add packetlog entry
1959         packetlog = d->packetlog + packetlognumber;
1960         packetlog->packetnumber = framenum;
1961         packetlog->numstates = 0;
1962         // write stat updates
1963         if (sv.protocol == PROTOCOL_DARKPLACES6)
1964         {
1965                 for (i = 0;i < MAX_CL_STATS;i++)
1966                 {
1967                         if (d->statsdeltabits[i>>3] & (1<<(i&7)))
1968                         {
1969                                 d->statsdeltabits[i>>3] &= ~(1<<(i&7));
1970                                 packetlog->statsdeltabits[i>>3] |= (1<<(i&7));
1971                                 if (d->stats[i] >= 0 && d->stats[i] < 256)
1972                                 {
1973                                         MSG_WriteByte(msg, svc_updatestatubyte);
1974                                         MSG_WriteByte(msg, i);
1975                                         MSG_WriteByte(msg, d->stats[i]);
1976                                 }
1977                                 else
1978                                 {
1979                                         MSG_WriteByte(msg, svc_updatestat);
1980                                         MSG_WriteByte(msg, i);
1981                                         MSG_WriteLong(msg, d->stats[i]);
1982                                 }
1983                         }
1984                 }
1985         }
1986         // write state updates
1987         d->latestframenum = framenum;
1988         MSG_WriteByte(msg, svc_entities);
1989         MSG_WriteLong(msg, framenum);
1990         for (priority = E5_PROTOCOL_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
1991         {
1992                 for (i = 0;i < entityframe5_prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
1993                 {
1994                         num = entityframe5_prioritychains[priority][i];
1995                         n = d->states + num;
1996                         if (d->deltabits[num] & E5_FULLUPDATE)
1997                                 d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
1998                         buf.cursize = 0;
1999                         EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
2000                         // if the entity won't fit, try the next one
2001                         if (msg->cursize + buf.cursize + 2 > msg->maxsize)
2002                                 continue;
2003                         // write entity to the packet
2004                         SZ_Write(msg, buf.data, buf.cursize);
2005                         // mark age on entity for prioritization
2006                         d->updateframenum[num] = framenum;
2007                         // log entity so deltabits can be restored later if lost
2008                         packetlog->states[packetlog->numstates].number = num;
2009                         packetlog->states[packetlog->numstates].bits = d->deltabits[num];
2010                         packetlog->numstates++;
2011                         // clear deltabits and priority so it won't be sent again
2012                         d->deltabits[num] = 0;
2013                         d->priorities[num] = 0;
2014                 }
2015         }
2016         MSG_WriteShort(msg, 0x8000);
2017 }
2018