got rid of cl_nodelta cvar (it has never been useful, and rarely worked)
[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         255,//unsigned char colormod;
34         // padding to a multiple of 8 bytes (to align the double time)
35         {0,0,0,0}//unsigned char unused[4]; // !
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)  s.colormod = MSG_ReadByte();
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)          MSG_WriteByte(&buf, s->colormod);
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)
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 && !(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)
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         if (cl.protocol == PROTOCOL_DARKPLACES5 && !(e->flags & RENDER_LOWPRECISION))
552         {
553                 if (bits & E_ANGLE1)
554                         e->angles[0] = MSG_ReadAngle16i();
555                 if (bits & E_ANGLE2)
556                         e->angles[1] = MSG_ReadAngle16i();
557                 if (bits & E_ANGLE3)
558                         e->angles[2] = MSG_ReadAngle16i();
559         }
560         else
561         {
562                 if (bits & E_ANGLE1)
563                         e->angles[0] = MSG_ReadAngle8i();
564                 if (bits & E_ANGLE2)
565                         e->angles[1] = MSG_ReadAngle8i();
566                 if (bits & E_ANGLE3)
567                         e->angles[2] = MSG_ReadAngle8i();
568         }
569         if (bits & E_MODEL1)
570                 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
571         if (bits & E_MODEL2)
572                 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
573         if (bits & E_FRAME1)
574                 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
575         if (bits & E_FRAME2)
576                 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
577         if (bits & E_EFFECTS1)
578                 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
579         if (bits & E_EFFECTS2)
580                 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
581         if (bits & E_COLORMAP)
582                 e->colormap = MSG_ReadByte();
583         if (bits & E_SKIN)
584                 e->skin = MSG_ReadByte();
585         if (bits & E_ALPHA)
586                 e->alpha = MSG_ReadByte();
587         if (bits & E_SCALE)
588                 e->scale = MSG_ReadByte();
589         if (bits & E_GLOWSIZE)
590                 e->glowsize = MSG_ReadByte();
591         if (bits & E_GLOWCOLOR)
592                 e->glowcolor = MSG_ReadByte();
593         if (cl.protocol == PROTOCOL_DARKPLACES2)
594                 if (bits & E_FLAGS)
595                         e->flags = MSG_ReadByte();
596         if (bits & E_TAGATTACHMENT)
597         {
598                 e->tagentity = (unsigned short) MSG_ReadShort();
599                 e->tagindex = MSG_ReadByte();
600         }
601         if (bits & E_LIGHT)
602         {
603                 e->light[0] = (unsigned short) MSG_ReadShort();
604                 e->light[1] = (unsigned short) MSG_ReadShort();
605                 e->light[2] = (unsigned short) MSG_ReadShort();
606                 e->light[3] = (unsigned short) MSG_ReadShort();
607         }
608         if (bits & E_LIGHTSTYLE)
609                 e->lightstyle = MSG_ReadByte();
610         if (bits & E_LIGHTPFLAGS)
611                 e->lightpflags = MSG_ReadByte();
612
613         if (developer_networkentities.integer >= 2)
614         {
615                 Con_Printf("ReadFields e%i", e->number);
616
617                 if (bits & E_ORIGIN1)
618                         Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
619                 if (bits & E_ORIGIN2)
620                         Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
621                 if (bits & E_ORIGIN3)
622                         Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
623                 if (bits & E_ANGLE1)
624                         Con_Printf(" E_ANGLE1 %f", e->angles[0]);
625                 if (bits & E_ANGLE2)
626                         Con_Printf(" E_ANGLE2 %f", e->angles[1]);
627                 if (bits & E_ANGLE3)
628                         Con_Printf(" E_ANGLE3 %f", e->angles[2]);
629                 if (bits & (E_MODEL1 | E_MODEL2))
630                         Con_Printf(" E_MODEL %i", e->modelindex);
631
632                 if (bits & (E_FRAME1 | E_FRAME2))
633                         Con_Printf(" E_FRAME %i", e->frame);
634                 if (bits & (E_EFFECTS1 | E_EFFECTS2))
635                         Con_Printf(" E_EFFECTS %i", e->effects);
636                 if (bits & E_ALPHA)
637                         Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
638                 if (bits & E_SCALE)
639                         Con_Printf(" E_SCALE %f", e->scale / 16.0f);
640                 if (bits & E_COLORMAP)
641                         Con_Printf(" E_COLORMAP %i", e->colormap);
642                 if (bits & E_SKIN)
643                         Con_Printf(" E_SKIN %i", e->skin);
644
645                 if (bits & E_GLOWSIZE)
646                         Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
647                 if (bits & E_GLOWCOLOR)
648                         Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
649                 
650                 if (bits & E_LIGHT)
651                         Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
652                 if (bits & E_LIGHTPFLAGS)                       
653                         Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
654
655                 if (bits & E_TAGATTACHMENT)
656                         Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
657                 if (bits & E_LIGHTSTYLE)
658                         Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
659                 Con_Print("\n");
660         }
661 }
662
663 // (client and server) allocates a new empty database
664 entityframe_database_t *EntityFrame_AllocDatabase(mempool_t *mempool)
665 {
666         return Mem_Alloc(mempool, sizeof(entityframe_database_t));
667 }
668
669 // (client and server) frees the database
670 void EntityFrame_FreeDatabase(entityframe_database_t *d)
671 {
672         Mem_Free(d);
673 }
674
675 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
676 void EntityFrame_ClearDatabase(entityframe_database_t *d)
677 {
678         memset(d, 0, sizeof(*d));
679 }
680
681 // (server and client) removes frames older than 'frame' from database
682 void EntityFrame_AckFrame(entityframe_database_t *d, int frame)
683 {
684         int i;
685         d->ackframenum = frame;
686         for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
687         // ignore outdated frame acks (out of order packets)
688         if (i == 0)
689                 return;
690         d->numframes -= i;
691         // if some queue is left, slide it down to beginning of array
692         if (d->numframes)
693                 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
694 }
695
696 // (server) clears frame, to prepare for adding entities
697 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
698 {
699         f->time = 0;
700         f->framenum = framenum;
701         f->numentities = 0;
702         if (eye == NULL)
703                 VectorClear(f->eye);
704         else
705                 VectorCopy(eye, f->eye);
706 }
707
708 // (server and client) reads a frame from the database
709 void EntityFrame_FetchFrame(entityframe_database_t *d, int framenum, entity_frame_t *f)
710 {
711         int i, n;
712         EntityFrame_Clear(f, NULL, -1);
713         for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
714         if (i < d->numframes && framenum == d->frames[i].framenum)
715         {
716                 f->framenum = framenum;
717                 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
718                 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
719                 if (n > f->numentities)
720                         n = f->numentities;
721                 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
722                 if (f->numentities > n)
723                         memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
724                 VectorCopy(d->eye, f->eye);
725         }
726 }
727
728 // (server and client) adds a entity_frame to the database, for future reference
729 void EntityFrame_AddFrame(entityframe_database_t *d, vec3_t eye, int framenum, int numentities, const entity_state_t *entitydata)
730 {
731         int n, e;
732         entity_frameinfo_t *info;
733
734         VectorCopy(eye, d->eye);
735
736         // figure out how many entity slots are used already
737         if (d->numframes)
738         {
739                 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
740                 if (n + numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
741                 {
742                         // ran out of room, dump database
743                         EntityFrame_ClearDatabase(d);
744                 }
745         }
746
747         info = &d->frames[d->numframes];
748         info->framenum = framenum;
749         e = -1000;
750         // make sure we check the newly added frame as well, but we haven't incremented numframes yet
751         for (n = 0;n <= d->numframes;n++)
752         {
753                 if (e >= d->frames[n].framenum)
754                 {
755                         if (e == framenum)
756                                 Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
757                         else
758                                 Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
759                         return;
760                 }
761                 e = d->frames[n].framenum;
762         }
763         // if database still has frames after that...
764         if (d->numframes)
765                 info->firstentity = d->frames[d->numframes - 1].endentity;
766         else
767                 info->firstentity = 0;
768         info->endentity = info->firstentity + numentities;
769         d->numframes++;
770
771         n = info->firstentity % MAX_ENTITY_DATABASE;
772         e = MAX_ENTITY_DATABASE - n;
773         if (e > numentities)
774                 e = numentities;
775         memcpy(d->entitydata + n, entitydata, sizeof(entity_state_t) * e);
776         if (numentities > e)
777                 memcpy(d->entitydata, entitydata + e, sizeof(entity_state_t) * (numentities - e));
778 }
779
780 // (server) writes a frame to network stream
781 static entity_frame_t deltaframe; // FIXME?
782 void EntityFrame_WriteFrame(sizebuf_t *msg, entityframe_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
783 {
784         int i, onum, number;
785         entity_frame_t *o = &deltaframe;
786         const entity_state_t *ent, *delta;
787         vec3_t eye;
788
789         d->latestframenum++;
790
791         VectorClear(eye);
792         for (i = 0;i < numstates;i++)
793         {
794                 if (states[i].number == viewentnum)
795                 {
796                         VectorSet(eye, states[i].origin[0], states[i].origin[1], states[i].origin[2] + 22);
797                         break;
798                 }
799         }
800
801         EntityFrame_AddFrame(d, eye, d->latestframenum, numstates, states);
802
803         EntityFrame_FetchFrame(d, d->ackframenum, o);
804
805         MSG_WriteByte (msg, svc_entities);
806         MSG_WriteLong (msg, o->framenum);
807         MSG_WriteLong (msg, d->latestframenum);
808         MSG_WriteFloat (msg, eye[0]);
809         MSG_WriteFloat (msg, eye[1]);
810         MSG_WriteFloat (msg, eye[2]);
811
812         onum = 0;
813         for (i = 0;i < numstates;i++)
814         {
815                 ent = states + i;
816                 number = ent->number;
817                 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
818                 {
819                         // write remove message
820                         MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
821                 }
822                 if (onum < o->numentities && (o->entitydata[onum].number == number))
823                 {
824                         // delta from previous frame
825                         delta = o->entitydata + onum;
826                         // advance to next entity in delta frame
827                         onum++;
828                 }
829                 else
830                 {
831                         // delta from defaults
832                         delta = &defaultstate;
833                 }
834                 EntityState_WriteUpdate(ent, msg, delta);
835         }
836         for (;onum < o->numentities;onum++)
837         {
838                 // write remove message
839                 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
840         }
841         MSG_WriteShort(msg, 0xFFFF);
842 }
843
844 // (client) reads a frame from network stream
845 static entity_frame_t framedata; // FIXME?
846 void EntityFrame_CL_ReadFrame(void)
847 {
848         int i, number, removed;
849         entity_frame_t *f = &framedata, *delta = &deltaframe;
850         entity_state_t *e, *old, *oldend;
851         entity_t *ent;
852         entityframe_database_t *d;
853         if (!cl.entitydatabase)
854                 cl.entitydatabase = EntityFrame_AllocDatabase(cl_entities_mempool);
855         d = cl.entitydatabase;
856
857         EntityFrame_Clear(f, NULL, -1);
858
859         // read the frame header info
860         f->time = cl.mtime[0];
861         number = MSG_ReadLong();
862         cl.latestframenum = f->framenum = MSG_ReadLong();
863         f->eye[0] = MSG_ReadFloat();
864         f->eye[1] = MSG_ReadFloat();
865         f->eye[2] = MSG_ReadFloat();
866         EntityFrame_AckFrame(d, number);
867         EntityFrame_FetchFrame(d, number, delta);
868         old = delta->entitydata;
869         oldend = old + delta->numentities;
870         // read entities until we hit the magic 0xFFFF end tag
871         while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF && !msg_badread)
872         {
873                 if (msg_badread)
874                         Host_Error("EntityFrame_Read: read error\n");
875                 removed = number & 0x8000;
876                 number &= 0x7FFF;
877                 if (number >= MAX_EDICTS)
878                         Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)\n", number, MAX_EDICTS);
879
880                 // seek to entity, while copying any skipped entities (assume unchanged)
881                 while (old < oldend && old->number < number)
882                 {
883                         if (f->numentities >= MAX_ENTITY_DATABASE)
884                                 Host_Error("EntityFrame_Read: entity list too big\n");
885                         f->entitydata[f->numentities] = *old++;
886                         f->entitydata[f->numentities++].time = cl.mtime[0];
887                 }
888                 if (removed)
889                 {
890                         if (old < oldend && old->number == number)
891                                 old++;
892                         else
893                                 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
894                 }
895                 else
896                 {
897                         if (f->numentities >= MAX_ENTITY_DATABASE)
898                                 Host_Error("EntityFrame_Read: entity list too big\n");
899
900                         // reserve this slot
901                         e = f->entitydata + f->numentities++;
902
903                         if (old < oldend && old->number == number)
904                         {
905                                 // delta from old entity
906                                 *e = *old++;
907                         }
908                         else
909                         {
910                                 // delta from defaults
911                                 *e = defaultstate;
912                         }
913
914                         cl_entities_active[number] = true;
915                         e->active = true;
916                         e->time = cl.mtime[0];
917                         e->number = number;
918                         EntityState_ReadFields(e, EntityState_ReadExtendBits());
919                 }
920         }
921         while (old < oldend)
922         {
923                 if (f->numentities >= MAX_ENTITY_DATABASE)
924                         Host_Error("EntityFrame_Read: entity list too big\n");
925                 f->entitydata[f->numentities] = *old++;
926                 f->entitydata[f->numentities++].time = cl.mtime[0];
927         }
928         EntityFrame_AddFrame(d, f->eye, f->framenum, f->numentities, f->entitydata);
929
930         memset(cl_entities_active, 0, cl_max_entities * sizeof(qbyte));
931         number = 1;
932         for (i = 0;i < f->numentities;i++)
933         {
934                 for (;number < f->entitydata[i].number;number++)
935                 {
936                         if (cl_entities_active[number])
937                         {
938                                 cl_entities_active[number] = false;
939                                 cl_entities[number].state_current.active = false;
940                         }
941                 }
942                 // update the entity
943                 ent = &cl_entities[number];
944                 ent->state_previous = ent->state_current;
945                 ent->state_current = f->entitydata[i];
946                 CL_MoveLerpEntityStates(ent);
947                 // the entity lives again...
948                 cl_entities_active[number] = true;
949                 number++;
950         }
951         for (;number < cl_max_entities;number++)
952         {
953                 if (cl_entities_active[number])
954                 {
955                         cl_entities_active[number] = false;
956                         cl_entities[number].state_current.active = false;
957                 }
958         }
959 }
960
961
962 // (client) returns the frame number of the most recent frame recieved
963 int EntityFrame_MostRecentlyRecievedFrameNum(entityframe_database_t *d)
964 {
965         if (d->numframes)
966                 return d->frames[d->numframes - 1].framenum;
967         else
968                 return -1;
969 }
970
971
972
973
974
975
976 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
977 {
978         if (d->maxreferenceentities <= number)
979         {
980                 int oldmax = d->maxreferenceentities;
981                 entity_state_t *oldentity = d->referenceentity;
982                 d->maxreferenceentities = (number + 15) & ~7;
983                 d->referenceentity = Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
984                 if (oldentity)
985                 {
986                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
987                         Mem_Free(oldentity);
988                 }
989                 // clear the newly created entities
990                 for (;oldmax < d->maxreferenceentities;oldmax++)
991                 {
992                         d->referenceentity[oldmax] = defaultstate;
993                         d->referenceentity[oldmax].number = oldmax;
994                 }
995         }
996         return d->referenceentity + number;
997 }
998
999 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
1000 {
1001         // resize commit's entity list if full
1002         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
1003         {
1004                 entity_state_t *oldentity = d->currentcommit->entity;
1005                 d->currentcommit->maxentities += 8;
1006                 d->currentcommit->entity = Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
1007                 if (oldentity)
1008                 {
1009                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
1010                         Mem_Free(oldentity);
1011                 }
1012         }
1013         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
1014 }
1015
1016 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
1017 {
1018         entityframe4_database_t *d;
1019         d = Mem_Alloc(pool, sizeof(*d));
1020         d->mempool = pool;
1021         EntityFrame4_ResetDatabase(d);
1022         return d;
1023 }
1024
1025 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
1026 {
1027         int i;
1028         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1029                 if (d->commit[i].entity)
1030                         Mem_Free(d->commit[i].entity);
1031         if (d->referenceentity)
1032                 Mem_Free(d->referenceentity);
1033         Mem_Free(d);
1034 }
1035
1036 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
1037 {
1038         int i;
1039         d->referenceframenum = -1;
1040         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1041                 d->commit[i].numentities = 0;
1042         for (i = 0;i < d->maxreferenceentities;i++)
1043                 d->referenceentity[i] = defaultstate;
1044 }
1045
1046 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
1047 {
1048         int i, j, found;
1049         entity_database4_commit_t *commit;
1050         if (framenum == -1)
1051         {
1052                 // reset reference, but leave commits alone
1053                 d->referenceframenum = -1;
1054                 for (i = 0;i < d->maxreferenceentities;i++)
1055                         d->referenceentity[i] = defaultstate;
1056                 // if this is the server, remove commits
1057                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1058                                 commit->numentities = 0;
1059                 found = true;
1060         }
1061         else if (d->referenceframenum == framenum)
1062                 found = true;
1063         else
1064         {
1065                 found = false;
1066                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
1067                 {
1068                         if (commit->numentities && commit->framenum <= framenum)
1069                         {
1070                                 if (commit->framenum == framenum)
1071                                 {
1072                                         found = true;
1073                                         d->referenceframenum = framenum;
1074                                         if (developer_networkentities.integer >= 3)
1075                                         {
1076                                                 for (j = 0;j < commit->numentities;j++)
1077                                                 {
1078                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
1079                                                         if (commit->entity[j].active != s->active)
1080                                                         {
1081                                                                 if (commit->entity[j].active)
1082                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1083                                                                 else
1084                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
1085                                                         }
1086                                                         *s = commit->entity[j];
1087                                                 }
1088                                         }
1089                                         else
1090                                                 for (j = 0;j < commit->numentities;j++)
1091                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
1092                                 }
1093                                 commit->numentities = 0;
1094                         }
1095                 }
1096         }
1097         if (developer_networkentities.integer >= 1)
1098         {
1099                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
1100                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1101                         if (d->commit[i].numentities)
1102                                 Con_Printf(" %i", d->commit[i].framenum);
1103                 Con_Print("\n");
1104         }
1105         return found;
1106 }
1107
1108 void EntityFrame4_CL_ReadFrame(void)
1109 {
1110         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
1111         entity_state_t *s;
1112         entityframe4_database_t *d;
1113         if (!cl.entitydatabase4)
1114                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cl_entities_mempool);
1115         d = cl.entitydatabase4;
1116         // read the number of the frame this refers to
1117         referenceframenum = MSG_ReadLong();
1118         // read the number of this frame
1119         cl.latestframenum = framenum = MSG_ReadLong();
1120         // read the start number
1121         enumber = (unsigned short) MSG_ReadShort();
1122         if (developer_networkentities.integer >= 1)
1123         {
1124                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
1125                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1126                         if (d->commit[i].numentities)
1127                                 Con_Printf(" %i", d->commit[i].framenum);
1128                 Con_Print("\n");
1129         }
1130         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
1131         {
1132                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
1133                 skip = true;
1134         }
1135         d->currentcommit = NULL;
1136         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1137         {
1138                 if (!d->commit[i].numentities)
1139                 {
1140                         d->currentcommit = d->commit + i;
1141                         d->currentcommit->framenum = framenum;
1142                         d->currentcommit->numentities = 0;
1143                 }
1144         }
1145         if (d->currentcommit == NULL)
1146         {
1147                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
1148                 skip = true;
1149         }
1150         done = false;
1151         while (!done && !msg_badread)
1152         {
1153                 // read the number of the modified entity
1154                 // (gaps will be copied unmodified)
1155                 n = (unsigned short)MSG_ReadShort();
1156                 if (n == 0x8000)
1157                 {
1158                         // no more entities in this update, but we still need to copy the
1159                         // rest of the reference entities (final gap)
1160                         done = true;
1161                         // read end of range number, then process normally
1162                         n = (unsigned short)MSG_ReadShort();
1163                 }
1164                 // high bit means it's a remove message
1165                 cnumber = n & 0x7FFF;
1166                 // add one (the changed one) if not done
1167                 stopnumber = cnumber + !done;
1168                 // process entities in range from the last one to the changed one
1169                 for (;enumber < stopnumber;enumber++)
1170                 {
1171                         if (skip)
1172                         {
1173                                 if (enumber == cnumber && (n & 0x8000) == 0)
1174                                 {
1175                                         entity_state_t tempstate;
1176                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
1177                                 }
1178                                 continue;
1179                         }
1180                         // slide the current into the previous slot
1181                         cl_entities[enumber].state_previous = cl_entities[enumber].state_current;
1182                         // copy a new current from reference database
1183                         cl_entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
1184                         s = &cl_entities[enumber].state_current;
1185                         // if this is the one to modify, read more data...
1186                         if (enumber == cnumber)
1187                         {
1188                                 if (n & 0x8000)
1189                                 {
1190                                         // simply removed
1191                                         if (developer_networkentities.integer >= 2)
1192                                                 Con_Printf("entity %i: remove\n", enumber);
1193                                         *s = defaultstate;
1194                                 }
1195                                 else
1196                                 {
1197                                         // read the changes
1198                                         if (developer_networkentities.integer >= 2)
1199                                                 Con_Printf("entity %i: update\n", enumber);
1200                                         s->active = true;
1201                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
1202                                 }
1203                         }
1204                         else if (developer_networkentities.integer >= 4)
1205                                 Con_Printf("entity %i: copy\n", enumber);
1206                         // set the cl_entities_active flag
1207                         cl_entities_active[enumber] = s->active;
1208                         // set the update time
1209                         s->time = cl.mtime[0];
1210                         // fix the number (it gets wiped occasionally by copying from defaultstate)
1211                         s->number = enumber;
1212                         // check if we need to update the lerp stuff
1213                         if (s->active)
1214                                 CL_MoveLerpEntityStates(&cl_entities[enumber]);
1215                         // add this to the commit entry whether it is modified or not
1216                         if (d->currentcommit)
1217                                 EntityFrame4_AddCommitEntity(d, &cl_entities[enumber].state_current);
1218                         // print extra messages if desired
1219                         if (developer_networkentities.integer >= 2 && cl_entities[enumber].state_current.active != cl_entities[enumber].state_previous.active)
1220                         {
1221                                 if (cl_entities[enumber].state_current.active)
1222                                         Con_Printf("entity #%i has become active\n", enumber);
1223                                 else if (cl_entities[enumber].state_previous.active)
1224                                         Con_Printf("entity #%i has become inactive\n", enumber);
1225                         }
1226                 }
1227         }
1228         d->currentcommit = NULL;
1229         if (skip)
1230                 EntityFrame4_ResetDatabase(d);
1231 }
1232
1233 void EntityFrame4_WriteFrame(sizebuf_t *msg, entityframe4_database_t *d, int numstates, const entity_state_t *states)
1234 {
1235         const entity_state_t *e, *s;
1236         entity_state_t inactiveentitystate;
1237         int i, n, startnumber;
1238         sizebuf_t buf;
1239         qbyte data[128];
1240
1241         // if there isn't enough space to accomplish anything, skip it
1242         if (msg->cursize + 24 > msg->maxsize)
1243                 return;
1244
1245         // prepare the buffer
1246         memset(&buf, 0, sizeof(buf));
1247         buf.data = data;
1248         buf.maxsize = sizeof(data);
1249
1250         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1251                 if (!d->commit[i].numentities)
1252                         break;
1253         // if commit buffer full, just don't bother writing an update this frame
1254         if (i == MAX_ENTITY_HISTORY)
1255                 return;
1256         d->currentcommit = d->commit + i;
1257
1258         // this state's number gets played around with later
1259         inactiveentitystate = defaultstate;
1260
1261         d->currentcommit->numentities = 0;
1262         d->currentcommit->framenum = ++d->latestframenumber;
1263         MSG_WriteByte(msg, svc_entities);
1264         MSG_WriteLong(msg, d->referenceframenum);
1265         MSG_WriteLong(msg, d->currentcommit->framenum);
1266         if (developer_networkentities.integer >= 1)
1267         {
1268                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
1269                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
1270                         if (d->commit[i].numentities)
1271                                 Con_Printf(" %i", d->commit[i].framenum);
1272                 Con_Print(")\n");
1273         }
1274         if (d->currententitynumber >= sv.max_edicts)
1275                 startnumber = 1;
1276         else
1277                 startnumber = bound(1, d->currententitynumber, sv.max_edicts - 1);
1278         MSG_WriteShort(msg, startnumber);
1279         // reset currententitynumber so if the loop does not break it we will
1280         // start at beginning next frame (if it does break, it will set it)
1281         d->currententitynumber = 1;
1282         for (i = 0, n = startnumber;n < sv.max_edicts;n++)
1283         {
1284                 // find the old state to delta from
1285                 e = EntityFrame4_GetReferenceEntity(d, n);
1286                 // prepare the buffer
1287                 SZ_Clear(&buf);
1288                 // entity exists, build an update (if empty there is no change)
1289                 // find the state in the list
1290                 for (;i < numstates && states[i].number < n;i++);
1291                 // make the message
1292                 s = states + i;
1293                 if (s->number == n)
1294                 {
1295                         // build the update
1296                         EntityState_WriteUpdate(s, &buf, e);
1297                 }
1298                 else
1299                 {
1300                         inactiveentitystate.number = n;
1301                         s = &inactiveentitystate;
1302                         if (e->active)
1303                         {
1304                                 // entity used to exist but doesn't anymore, send remove
1305                                 MSG_WriteShort(&buf, n | 0x8000);
1306                         }
1307                 }
1308                 // if the commit is full, we're done this frame
1309                 if (msg->cursize + buf.cursize > msg->maxsize - 4)
1310                 {
1311                         // next frame we will continue where we left off
1312                         break;
1313                 }
1314                 // add the entity to the commit
1315                 EntityFrame4_AddCommitEntity(d, s);
1316                 // if the message is empty, skip out now
1317                 if (buf.cursize)
1318                 {
1319                         // write the message to the packet
1320                         SZ_Write(msg, buf.data, buf.cursize);
1321                 }
1322         }
1323         d->currententitynumber = n;
1324
1325         // remove world message (invalid, and thus a good terminator)
1326         MSG_WriteShort(msg, 0x8000);
1327         // write the number of the end entity
1328         MSG_WriteShort(msg, d->currententitynumber);
1329         // just to be sure
1330         d->currentcommit = NULL;
1331 }
1332
1333
1334
1335
1336 #define E5_PROTOCOL_PRIORITYLEVELS 32
1337
1338 entityframe5_database_t *EntityFrame5_AllocDatabase(mempool_t *pool)
1339 {
1340         entityframe5_database_t *d;
1341         d = Mem_Alloc(pool, sizeof(*d));
1342         EntityFrame5_ResetDatabase(d);
1343         return d;
1344 }
1345
1346 void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
1347 {
1348         Mem_Free(d);
1349 }
1350
1351 void EntityFrame5_ResetDatabase(entityframe5_database_t *d)
1352 {
1353         int i;
1354         memset(d, 0, sizeof(*d));
1355         d->latestframenum = 0;
1356         for (i = 0;i < MAX_EDICTS;i++)
1357                 d->states[i] = defaultstate;
1358 }
1359
1360
1361 int EntityState5_Priority(entityframe5_database_t *d, entity_state_t *view, entity_state_t *s, int changedbits, int age)
1362 {
1363         int lowprecision, limit, priority;
1364         double distance;
1365         if (!changedbits)
1366                 return 0;
1367         if (!s->active/* && changedbits & E5_FULLUPDATE*/)
1368                 return E5_PROTOCOL_PRIORITYLEVELS - 1;
1369         // check whole attachment chain to judge relevance to player
1370         lowprecision = false;
1371         for (limit = 0;limit < 256;limit++)
1372         {
1373                 if (s == view)
1374                         return E5_PROTOCOL_PRIORITYLEVELS - 1;
1375                 if (s->flags & RENDER_VIEWMODEL)
1376                         return E5_PROTOCOL_PRIORITYLEVELS - 1;
1377                 if (s->flags & RENDER_LOWPRECISION)
1378                         lowprecision = true;
1379                 if (!s->tagentity)
1380                 {
1381                         if (VectorCompare(s->origin, view->origin))
1382                                 return E5_PROTOCOL_PRIORITYLEVELS - 1;
1383                         break;
1384                 }
1385                 s = d->states + s->tagentity;
1386         }
1387         if (limit >= 256)
1388                 Con_Printf("Protocol: Runaway loop recursing tagentity links on entity %i\n", s->number);
1389         // it's not a viewmodel for this client
1390         distance = VectorDistance(view->origin, s->origin);
1391         priority = (E5_PROTOCOL_PRIORITYLEVELS / 2) + age - (int)(distance * (E5_PROTOCOL_PRIORITYLEVELS / 16384.0f));
1392         if (lowprecision)
1393                 priority -= (E5_PROTOCOL_PRIORITYLEVELS / 4);
1394         //if (changedbits & E5_FULLUPDATE)
1395         //      priority += 4;
1396         //if (changedbits & (E5_ATTACHMENT | E5_MODEL | E5_FLAGS | E5_COLORMAP))
1397         //      priority += 4;
1398         return (int) bound(1, priority, E5_PROTOCOL_PRIORITYLEVELS - 1);
1399 }
1400
1401 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
1402 {
1403         unsigned int bits = 0;
1404         if (!s->active)
1405                 MSG_WriteShort(msg, number | 0x8000);
1406         else
1407         {
1408                 bits = changedbits;
1409                 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))
1410                         bits |= E5_ORIGIN32;
1411                 if ((bits & E5_ANGLES) && !(s->flags & RENDER_LOWPRECISION))
1412                         bits |= E5_ANGLES16;
1413                 if ((bits & E5_MODEL) && s->modelindex >= 256)
1414                         bits |= E5_MODEL16;
1415                 if ((bits & E5_FRAME) && s->frame >= 256)
1416                         bits |= E5_FRAME16;
1417                 if (bits & E5_EFFECTS)
1418                 {
1419                         if (s->effects >= 65536)
1420                                 bits |= E5_EFFECTS32;
1421                         else if (s->effects >= 256)
1422                                 bits |= E5_EFFECTS16;
1423                 }
1424                 if (bits >= 256)
1425                         bits |= E5_EXTEND1;
1426                 if (bits >= 65536)
1427                         bits |= E5_EXTEND2;
1428                 if (bits >= 16777216)
1429                         bits |= E5_EXTEND3;
1430                 MSG_WriteShort(msg, number);
1431                 MSG_WriteByte(msg, bits & 0xFF);
1432                 if (bits & E5_EXTEND1)
1433                         MSG_WriteByte(msg, (bits >> 8) & 0xFF);
1434                 if (bits & E5_EXTEND2)
1435                         MSG_WriteByte(msg, (bits >> 16) & 0xFF);
1436                 if (bits & E5_EXTEND3)
1437                         MSG_WriteByte(msg, (bits >> 24) & 0xFF);
1438                 if (bits & E5_FLAGS)
1439                         MSG_WriteByte(msg, s->flags);
1440                 if (bits & E5_ORIGIN)
1441                 {
1442                         if (bits & E5_ORIGIN32)
1443                         {
1444                                 MSG_WriteCoord32f(msg, s->origin[0]);
1445                                 MSG_WriteCoord32f(msg, s->origin[1]);
1446                                 MSG_WriteCoord32f(msg, s->origin[2]);
1447                         }
1448                         else
1449                         {
1450                                 MSG_WriteCoord13i(msg, s->origin[0]);
1451                                 MSG_WriteCoord13i(msg, s->origin[1]);
1452                                 MSG_WriteCoord13i(msg, s->origin[2]);
1453                         }
1454                 }
1455                 if (bits & E5_ANGLES)
1456                 {
1457                         if (bits & E5_ANGLES16)
1458                         {
1459                                 MSG_WriteAngle16i(msg, s->angles[0]);
1460                                 MSG_WriteAngle16i(msg, s->angles[1]);
1461                                 MSG_WriteAngle16i(msg, s->angles[2]);
1462                         }
1463                         else
1464                         {
1465                                 MSG_WriteAngle8i(msg, s->angles[0]);
1466                                 MSG_WriteAngle8i(msg, s->angles[1]);
1467                                 MSG_WriteAngle8i(msg, s->angles[2]);
1468                         }
1469                 }
1470                 if (bits & E5_MODEL)
1471                 {
1472                         if (bits & E5_MODEL16)
1473                                 MSG_WriteShort(msg, s->modelindex);
1474                         else
1475                                 MSG_WriteByte(msg, s->modelindex);
1476                 }
1477                 if (bits & E5_FRAME)
1478                 {
1479                         if (bits & E5_FRAME16)
1480                                 MSG_WriteShort(msg, s->frame);
1481                         else
1482                                 MSG_WriteByte(msg, s->frame);
1483                 }
1484                 if (bits & E5_SKIN)
1485                         MSG_WriteByte(msg, s->skin);
1486                 if (bits & E5_EFFECTS)
1487                 {
1488                         if (bits & E5_EFFECTS32)
1489                                 MSG_WriteLong(msg, s->effects);
1490                         else if (bits & E5_EFFECTS16)
1491                                 MSG_WriteShort(msg, s->effects);
1492                         else
1493                                 MSG_WriteByte(msg, s->effects);
1494                 }
1495                 if (bits & E5_ALPHA)
1496                         MSG_WriteByte(msg, s->alpha);
1497                 if (bits & E5_SCALE)
1498                         MSG_WriteByte(msg, s->scale);
1499                 if (bits & E5_COLORMAP)
1500                         MSG_WriteByte(msg, s->colormap);
1501                 if (bits & E5_ATTACHMENT)
1502                 {
1503                         MSG_WriteShort(msg, s->tagentity);
1504                         MSG_WriteByte(msg, s->tagindex);
1505                 }
1506                 if (bits & E5_LIGHT)
1507                 {
1508                         MSG_WriteShort(msg, s->light[0]);
1509                         MSG_WriteShort(msg, s->light[1]);
1510                         MSG_WriteShort(msg, s->light[2]);
1511                         MSG_WriteShort(msg, s->light[3]);
1512                         MSG_WriteByte(msg, s->lightstyle);
1513                         MSG_WriteByte(msg, s->lightpflags);
1514                 }
1515                 if (bits & E5_GLOW)
1516                 {
1517                         MSG_WriteByte(msg, s->glowsize);
1518                         MSG_WriteByte(msg, s->glowcolor);
1519                 }
1520         }
1521 }
1522
1523 void EntityState5_ReadUpdate(entity_state_t *s)
1524 {
1525         int bits;
1526         bits = MSG_ReadByte();
1527         if (bits & E5_EXTEND1)
1528         {
1529                 bits |= MSG_ReadByte() << 8;
1530                 if (bits & E5_EXTEND2)
1531                 {
1532                         bits |= MSG_ReadByte() << 16;
1533                         if (bits & E5_EXTEND3)
1534                                 bits |= MSG_ReadByte() << 24;
1535                 }
1536         }
1537         if (bits & E5_FULLUPDATE)
1538         {
1539                 *s = defaultstate;
1540                 s->active = true;
1541         }
1542         if (bits & E5_FLAGS)
1543                 s->flags = MSG_ReadByte();
1544         if (bits & E5_ORIGIN)
1545         {
1546                 if (bits & E5_ORIGIN32)
1547                 {
1548                         s->origin[0] = MSG_ReadCoord32f();
1549                         s->origin[1] = MSG_ReadCoord32f();
1550                         s->origin[2] = MSG_ReadCoord32f();
1551                 }
1552                 else
1553                 {
1554                         s->origin[0] = MSG_ReadCoord13i();
1555                         s->origin[1] = MSG_ReadCoord13i();
1556                         s->origin[2] = MSG_ReadCoord13i();
1557                 }
1558         }
1559         if (bits & E5_ANGLES)
1560         {
1561                 if (bits & E5_ANGLES16)
1562                 {
1563                         s->angles[0] = MSG_ReadAngle16i(); 
1564                         s->angles[1] = MSG_ReadAngle16i(); 
1565                         s->angles[2] = MSG_ReadAngle16i(); 
1566                 }
1567                 else
1568                 {
1569                         s->angles[0] = MSG_ReadAngle8i(); 
1570                         s->angles[1] = MSG_ReadAngle8i(); 
1571                         s->angles[2] = MSG_ReadAngle8i(); 
1572                 }
1573         }
1574         if (bits & E5_MODEL)
1575         {
1576                 if (bits & E5_MODEL16)
1577                         s->modelindex = (unsigned short) MSG_ReadShort();
1578                 else
1579                         s->modelindex = MSG_ReadByte();
1580         }
1581         if (bits & E5_FRAME)
1582         {
1583                 if (bits & E5_FRAME16)
1584                         s->frame = (unsigned short) MSG_ReadShort();
1585                 else
1586                         s->frame = MSG_ReadByte();
1587         }
1588         if (bits & E5_SKIN)
1589                 s->skin = MSG_ReadByte();
1590         if (bits & E5_EFFECTS)
1591         {
1592                 if (bits & E5_EFFECTS32)
1593                         s->effects = (unsigned int) MSG_ReadLong();
1594                 else if (bits & E5_EFFECTS16)
1595                         s->effects = (unsigned short) MSG_ReadShort();
1596                 else
1597                         s->effects = MSG_ReadByte();
1598         }
1599         if (bits & E5_ALPHA)
1600                 s->alpha = MSG_ReadByte();
1601         if (bits & E5_SCALE)
1602                 s->scale = MSG_ReadByte();
1603         if (bits & E5_COLORMAP)
1604                 s->colormap = MSG_ReadByte();
1605         if (bits & E5_ATTACHMENT)
1606         {
1607                 s->tagentity = (unsigned short) MSG_ReadShort();
1608                 s->tagindex = MSG_ReadByte();
1609         }
1610         if (bits & E5_LIGHT)
1611         {
1612                 s->light[0] = (unsigned short) MSG_ReadShort();
1613                 s->light[1] = (unsigned short) MSG_ReadShort();
1614                 s->light[2] = (unsigned short) MSG_ReadShort();
1615                 s->light[3] = (unsigned short) MSG_ReadShort();
1616                 s->lightstyle = MSG_ReadByte();
1617                 s->lightpflags = MSG_ReadByte();
1618         }
1619         if (bits & E5_GLOW)
1620         {
1621                 s->glowsize = MSG_ReadByte();
1622                 s->glowcolor = MSG_ReadByte();
1623         }
1624
1625
1626         if (developer_networkentities.integer >= 2)
1627         {
1628                 Con_Printf("ReadFields e%i", s->number);
1629
1630                 if (bits & E5_ORIGIN)
1631                         Con_Printf(" E5_ORIGIN %f %f %f", s->origin[0], s->origin[1], s->origin[2]);
1632                 if (bits & E5_ANGLES)
1633                         Con_Printf(" E5_ANGLES %f %f %f", s->angles[0], s->angles[1], s->angles[2]);
1634                 if (bits & E5_MODEL)
1635                         Con_Printf(" E5_MODEL %i", s->modelindex);
1636                 if (bits & E5_FRAME)
1637                         Con_Printf(" E5_FRAME %i", s->frame);
1638                 if (bits & E5_SKIN)
1639                         Con_Printf(" E5_SKIN %i", s->skin);
1640                 if (bits & E5_EFFECTS)
1641                         Con_Printf(" E5_EFFECTS %i", s->effects);
1642                 if (bits & E5_FLAGS)
1643                 {
1644                         Con_Printf(" E5_FLAGS %i (", s->flags);
1645                         if (s->flags & RENDER_STEP)
1646                                 Con_Print(" STEP");
1647                         if (s->flags & RENDER_GLOWTRAIL)
1648                                 Con_Print(" GLOWTRAIL");
1649                         if (s->flags & RENDER_VIEWMODEL)
1650                                 Con_Print(" VIEWMODEL");
1651                         if (s->flags & RENDER_EXTERIORMODEL)
1652                                 Con_Print(" EXTERIORMODEL");
1653                         if (s->flags & RENDER_LOWPRECISION)
1654                                 Con_Print(" LOWPRECISION");
1655                         if (s->flags & RENDER_COLORMAPPED)
1656                                 Con_Print(" COLORMAPPED");
1657                         if (s->flags & RENDER_SHADOW)
1658                                 Con_Print(" SHADOW");
1659                         if (s->flags & RENDER_LIGHT)
1660                                 Con_Print(" LIGHT");
1661                         Con_Print(")");
1662                 }
1663                 if (bits & E5_ALPHA)
1664                         Con_Printf(" E5_ALPHA %f", s->alpha / 255.0f);
1665                 if (bits & E5_SCALE)
1666                         Con_Printf(" E5_SCALE %f", s->scale / 16.0f);
1667                 if (bits & E5_COLORMAP)
1668                         Con_Printf(" E5_COLORMAP %i", s->colormap);
1669                 if (bits & E5_ATTACHMENT)
1670                         Con_Printf(" E5_ATTACHMENT e%i:%i", s->tagentity, s->tagindex);
1671                 if (bits & E5_LIGHT)
1672                         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);
1673                 if (bits & E5_GLOW)
1674                         Con_Printf(" E5_GLOW %i:%i", s->glowsize * 4, s->glowcolor);
1675                 Con_Print("\n");
1676         }
1677 }
1678
1679 int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
1680 {
1681         unsigned int bits = 0;
1682         if (n->active)
1683         {
1684                 if (!o->active)
1685                         bits |= E5_FULLUPDATE;
1686                 if (!VectorCompare(o->origin, n->origin))
1687                         bits |= E5_ORIGIN;
1688                 if (!VectorCompare(o->angles, n->angles))
1689                         bits |= E5_ANGLES;
1690                 if (o->modelindex != n->modelindex)
1691                         bits |= E5_MODEL;
1692                 if (o->frame != n->frame)
1693                         bits |= E5_FRAME;
1694                 if (o->skin != n->skin)
1695                         bits |= E5_SKIN;
1696                 if (o->effects != n->effects)
1697                         bits |= E5_EFFECTS;
1698                 if (o->flags != n->flags)
1699                         bits |= E5_FLAGS;
1700                 if (o->alpha != n->alpha)
1701                         bits |= E5_ALPHA;
1702                 if (o->scale != n->scale)
1703                         bits |= E5_SCALE;
1704                 if (o->colormap != n->colormap)
1705                         bits |= E5_COLORMAP;
1706                 if (o->tagentity != n->tagentity || o->tagindex != n->tagindex)
1707                         bits |= E5_ATTACHMENT;
1708                 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)
1709                         bits |= E5_LIGHT;
1710                 if (o->glowsize != n->glowsize || o->glowcolor != n->glowcolor)
1711                         bits |= E5_GLOW;
1712         }
1713         else
1714                 if (o->active)
1715                         bits |= E5_FULLUPDATE;
1716         return bits;
1717 }
1718
1719 void EntityFrame5_CL_ReadFrame(void)
1720 {
1721         int n, enumber;
1722         entity_t *ent;
1723         entity_state_t *s;
1724         // read the number of this frame to echo back in next input packet
1725         cl.latestframenum = MSG_ReadLong();
1726         // read entity numbers until we find a 0x8000
1727         // (which would be remove world entity, but is actually a terminator)
1728         while ((n = (unsigned short)MSG_ReadShort()) != 0x8000 && !msg_badread)
1729         {
1730                 // get the entity number and look it up
1731                 enumber = n & 0x7FFF;
1732                 ent = cl_entities + enumber;
1733                 // slide the current into the previous slot
1734                 ent->state_previous = ent->state_current;
1735                 // read the update
1736                 s = &ent->state_current;
1737                 if (n & 0x8000)
1738                 {
1739                         // remove entity
1740                         *s = defaultstate;
1741                 }
1742                 else
1743                 {
1744                         // update entity
1745                         EntityState5_ReadUpdate(s);
1746                 }
1747                 // set the cl_entities_active flag
1748                 cl_entities_active[enumber] = s->active;
1749                 // set the update time
1750                 s->time = cl.mtime[0];
1751                 // fix the number (it gets wiped occasionally by copying from defaultstate)
1752                 s->number = enumber;
1753                 // check if we need to update the lerp stuff
1754                 if (s->active)
1755                         CL_MoveLerpEntityStates(&cl_entities[enumber]);
1756                 // print extra messages if desired
1757                 if (developer_networkentities.integer >= 2 && cl_entities[enumber].state_current.active != cl_entities[enumber].state_previous.active)
1758                 {
1759                         if (cl_entities[enumber].state_current.active)
1760                                 Con_Printf("entity #%i has become active\n", enumber);
1761                         else if (cl_entities[enumber].state_previous.active)
1762                                 Con_Printf("entity #%i has become inactive\n", enumber);
1763                 }
1764         }
1765 }
1766
1767 void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum, int viewentnum)
1768 {
1769         int i, j, k, l, bits;
1770         entityframe5_changestate_t *s, *s2;
1771         entityframe5_packetlog_t *p, *p2;
1772         // scan for packets made obsolete by this ack
1773         for (i = 0, p = d->packetlog;i < ENTITYFRAME5_MAXPACKETLOGS;i++, p++)
1774         {
1775                 // skip packets that are empty or in the future
1776                 if (p->packetnumber == 0 || p->packetnumber > framenum)
1777                         continue;
1778                 // if the packetnumber matches it is deleted without any processing 
1779                 // (since it was received).
1780                 // if the packet number is less than this ack it was lost and its
1781                 // important information will be repeated in this update if it is not
1782                 // already obsolete due to a later update.
1783                 if (p->packetnumber < framenum)
1784                 {
1785                         // packet was lost - merge deltabits into the main array so they
1786                         // will be re-sent, but only if there is no newer update of that
1787                         // bit in the logs (as those will arrive before this update)
1788                         for (j = 0, s = p->states;j < p->numstates;j++, s++)
1789                         {
1790                                 // check for any newer updates to this entity and mask off any
1791                                 // overlapping bits (we don't need to send something again if
1792                                 // it has already been sent more recently)
1793                                 bits = s->bits & ~d->deltabits[s->number];
1794                                 for (k = 0, p2 = d->packetlog;k < ENTITYFRAME5_MAXPACKETLOGS && bits;k++, p2++)
1795                                 {
1796                                         if (p2->packetnumber > framenum)
1797                                         {
1798                                                 for (l = 0, s2 = p2->states;l < p2->numstates;l++, p2++)
1799                                                 {
1800                                                         if (s2->number == s->number)
1801                                                         {
1802                                                                 bits &= ~s2->bits;
1803                                                                 break;
1804                                                         }
1805                                                 }
1806                                         }
1807                                 }
1808                                 // if the bits haven't all been cleared, there were some bits
1809                                 // lost with this packet, so set them again now
1810                                 if (bits)
1811                                 {
1812                                         d->deltabits[s->number] |= bits;
1813                                         d->priorities[s->number] = EntityState5_Priority(d, d->states + viewentnum, d->states + s->number, d->deltabits[s->number], d->latestframenum - d->updateframenum[s->number]);
1814                                 }
1815                         }
1816                 }
1817                 // delete this packet log as it is now obsolete
1818                 p->packetnumber = 0;
1819         }
1820 }
1821
1822 int entityframe5_prioritychaincounts[E5_PROTOCOL_PRIORITYLEVELS];
1823 unsigned short entityframe5_prioritychains[E5_PROTOCOL_PRIORITYLEVELS][ENTITYFRAME5_MAXSTATES];
1824
1825 void EntityFrame5_WriteFrame(sizebuf_t *msg, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum)
1826 {
1827         const entity_state_t *n;
1828         int i, num, l, framenum, packetlognumber, priority;
1829         sizebuf_t buf;
1830         qbyte data[128];
1831         entityframe5_packetlog_t *packetlog;
1832
1833         framenum = d->latestframenum + 1;
1834
1835         // prepare the buffer
1836         memset(&buf, 0, sizeof(buf));
1837         buf.data = data;
1838         buf.maxsize = sizeof(data);
1839
1840         // detect changes in states
1841         num = 0;
1842         for (i = 0, n = states;i < numstates;i++, n++)
1843         {
1844                 // mark gaps in entity numbering as removed entities
1845                 for (;num < n->number;num++)
1846                 {
1847                         // if the entity used to exist, clear it
1848                         if (CHECKPVSBIT(d->visiblebits, num))
1849                         {
1850                                 CLEARPVSBIT(d->visiblebits, num);
1851                                 d->deltabits[num] = E5_FULLUPDATE;
1852                                 d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
1853                                 d->states[num] = defaultstate;
1854                                 d->states[num].number = num;
1855                         }
1856                 }
1857                 // update the entity state data
1858                 if (!CHECKPVSBIT(d->visiblebits, num))
1859                 {
1860                         // entity just spawned in, don't let it completely hog priority
1861                         // because of being ancient on the first frame
1862                         d->updateframenum[num] = framenum;
1863                 }
1864                 SETPVSBIT(d->visiblebits, num);
1865                 d->deltabits[num] |= EntityState5_DeltaBits(d->states + num, n);
1866                 d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
1867                 d->states[num] = *n;
1868                 d->states[num].number = num;
1869                 // advance to next entity so the next iteration doesn't immediately remove it
1870                 num++;
1871         }
1872         // all remaining entities are dead
1873         for (;num < MAX_EDICTS;num++)
1874         {
1875                 if (CHECKPVSBIT(d->visiblebits, num))
1876                 {
1877                         CLEARPVSBIT(d->visiblebits, num);
1878                         d->deltabits[num] = E5_FULLUPDATE;
1879                         d->priorities[num] = EntityState5_Priority(d, d->states + viewentnum, d->states + num, d->deltabits[num], framenum - d->updateframenum[num]);
1880                         d->states[num] = defaultstate;
1881                         d->states[num].number = num;
1882                 }
1883         }
1884
1885         // build lists of entities by priority level
1886         memset(entityframe5_prioritychaincounts, 0, sizeof(entityframe5_prioritychaincounts));
1887         l = 0;
1888         for (num = 0;num < MAX_EDICTS;num++)
1889         {
1890                 if (d->priorities[num])
1891                 {
1892                         l = num;
1893                         priority = d->priorities[num];
1894                         if (entityframe5_prioritychaincounts[priority] < ENTITYFRAME5_MAXSTATES)
1895                                 entityframe5_prioritychains[priority][entityframe5_prioritychaincounts[priority]++] = num;
1896                 }
1897         }
1898
1899         // return early if there are no entities to send this time
1900         if (l == 0)
1901                 return;
1902
1903         d->latestframenum = framenum;
1904         MSG_WriteByte(msg, svc_entities);
1905         MSG_WriteLong(msg, framenum);
1906
1907         // if packet log is full, an empty update is still written
1908         // (otherwise the client might have nothing to ack to remove packetlogs)
1909         for (packetlognumber = 0, packetlog = d->packetlog;packetlognumber < ENTITYFRAME5_MAXPACKETLOGS;packetlognumber++, packetlog++)
1910                 if (packetlog->packetnumber == 0)
1911                         break;
1912         if (packetlognumber < ENTITYFRAME5_MAXPACKETLOGS)
1913         {
1914                 // write to packet and log
1915                 packetlog->packetnumber = framenum;
1916                 packetlog->numstates = 0;
1917                 for (priority = E5_PROTOCOL_PRIORITYLEVELS - 1;priority >= 0 && packetlog->numstates < ENTITYFRAME5_MAXSTATES;priority--)
1918                 {
1919                         for (i = 0;i < entityframe5_prioritychaincounts[priority] && packetlog->numstates < ENTITYFRAME5_MAXSTATES;i++)
1920                         {
1921                                 num = entityframe5_prioritychains[priority][i];
1922                                 n = d->states + num;
1923                                 if (d->deltabits[num] & E5_FULLUPDATE)
1924                                         d->deltabits[num] = E5_FULLUPDATE | EntityState5_DeltaBits(&defaultstate, n);
1925                                 buf.cursize = 0;
1926                                 EntityState5_WriteUpdate(num, n, d->deltabits[num], &buf);
1927                                 // if the entity won't fit, try the next one
1928                                 if (msg->cursize + buf.cursize + 2 > msg->maxsize)
1929                                         continue;
1930                                 // write entity to the packet
1931                                 SZ_Write(msg, buf.data, buf.cursize);
1932                                 // mark age on entity for prioritization
1933                                 d->updateframenum[num] = framenum;
1934                                 // log entity so deltabits can be restored later if lost
1935                                 packetlog->states[packetlog->numstates].number = num;
1936                                 packetlog->states[packetlog->numstates].bits = d->deltabits[num];
1937                                 packetlog->numstates++;
1938                                 // clear deltabits and priority so it won't be sent again
1939                                 d->deltabits[num] = 0;
1940                                 d->priorities[num] = 0;
1941                         }
1942                 }
1943         }
1944
1945         MSG_WriteShort(msg, 0x8000);
1946 }
1947