4 void ClearStateToDefault(entity_state_t *s)
8 VectorClear(s->origin);
9 VectorClear(s->angles);
22 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
23 void EntityFrame_ClearDatabase(entity_database_t *d)
25 memset(d, 0, sizeof(*d));
28 // (server and client) removes frames older than 'frame' from database
29 void EntityFrame_AckFrame(entity_database_t *d, int frame)
32 if (d->ackframe < frame)
34 for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
35 // ignore outdated frame acks (out of order packets)
39 // if some queue is left, slide it down to beginning of array
41 memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
44 // (server) clears frame, to prepare for adding entities
45 void EntityFrame_Clear(entity_frame_t *f, vec3_t eye)
47 //memset(f, 0, sizeof(*f));
57 VectorCopy(eye, f->eye);
61 // (server) allocates an entity slot in frame, returns NULL if full
62 entity_state_t *EntityFrame_NewEntity(entity_frame_t *f, int number)
65 if (f->numentities >= MAX_ENTITY_DATABASE)
67 e = &f->entitydata[f->numentities++];
73 // (server and client) reads a frame from the database
74 void EntityFrame_FetchFrame(entity_database_t *d, int framenum, entity_frame_t *f)
77 EntityFrame_Clear(f, NULL);
78 for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
79 if (i < d->numframes && framenum == d->frames[i].framenum)
81 f->framenum = framenum;
82 f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
83 n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
84 if (n > f->numentities)
86 memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
87 if (f->numentities > n)
88 memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
89 VectorCopy(d->eye, f->eye);
95 // (server and client) adds a entity_frame to the database, for future reference
96 void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f)
99 entity_frameinfo_t *info;
101 VectorCopy(f->eye, d->eye);
103 // figure out how many entity slots are used already
106 n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
107 if (n + f->numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
109 // ran out of room, dump database
110 EntityFrame_ClearDatabase(d);
114 info = &d->frames[d->numframes];
115 info->framenum = f->framenum;
117 // make sure we check the newly added frame as well, but we haven't incremented numframes yet
118 for (n = 0;n <= d->numframes;n++)
120 if (e >= d->frames[n].framenum)
122 if (e == f->framenum)
123 Con_Printf("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
125 Con_Printf("EntityFrame_AddFrame: out of sequence frames in database\n");
128 e = d->frames[n].framenum;
130 // if database still has frames after that...
132 info->firstentity = d->frames[d->numframes - 1].endentity;
134 info->firstentity = 0;
135 info->endentity = info->firstentity + f->numentities;
138 n = info->firstentity % MAX_ENTITY_DATABASE;
139 e = MAX_ENTITY_DATABASE - n;
140 if (e > f->numentities)
142 memcpy(d->entitydata + n, f->entitydata, sizeof(entity_state_t) * e);
143 if (f->numentities > e)
144 memcpy(d->entitydata, f->entitydata + e, sizeof(entity_state_t) * (f->numentities - e));
147 // (server) writes a frame to network stream
148 void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
150 int i, onum, bits, number;
151 entity_frame_t deltaframe, *o = &deltaframe;
152 entity_state_t *ent, *delta, baseline;
154 EntityFrame_AddFrame(d, f);
156 ClearStateToDefault(&baseline);
157 EntityFrame_FetchFrame(d, d->ackframe > 0 ? d->ackframe : -1, o);
158 MSG_WriteByte (msg, svc_entities);
159 MSG_WriteLong (msg, o->framenum);
160 MSG_WriteLong (msg, f->framenum);
161 MSG_WriteFloat (msg, f->eye[0]);
162 MSG_WriteFloat (msg, f->eye[1]);
163 MSG_WriteFloat (msg, f->eye[2]);
166 for (i = 0;i < f->numentities;i++)
168 ent = f->entitydata + i;
169 number = ent->number;
170 for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
172 // write remove message
173 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
175 if (onum < o->numentities && (o->entitydata[onum].number == number))
177 // delta from previous frame
178 delta = o->entitydata + onum;
179 // advance to next entity in delta frame
184 // delta from baseline
188 if (ent->flags & RENDER_LOWPRECISION)
190 if ((int) ent->origin[0] != (int) delta->origin[0])
192 if ((int) ent->origin[1] != (int) delta->origin[1])
194 if ((int) ent->origin[2] != (int) delta->origin[2])
199 if (fabs(ent->origin[0] - delta->origin[0]) > 0.01f)
201 if (fabs(ent->origin[1] - delta->origin[1]) > 0.01f)
203 if (fabs(ent->origin[2] - delta->origin[2]) > 0.01f)
206 if ((qbyte) (ent->angles[0] * (256.0f / 360.0f)) != (qbyte) (delta->angles[0] * (256.0f / 360.0f)))
208 if ((qbyte) (ent->angles[1] * (256.0f / 360.0f)) != (qbyte) (delta->angles[1] * (256.0f / 360.0f)))
210 if ((qbyte) (ent->angles[2] * (256.0f / 360.0f)) != (qbyte) (delta->angles[2] * (256.0f / 360.0f)))
212 if ((ent->modelindex ^ delta->modelindex) & 0x00FF)
214 if ((ent->modelindex ^ delta->modelindex) & 0xFF00)
216 if ((ent->frame ^ delta->frame) & 0x00FF)
218 if ((ent->frame ^ delta->frame) & 0xFF00)
220 if ((ent->effects ^ delta->effects) & 0x00FF)
222 if ((ent->effects ^ delta->effects) & 0xFF00)
224 if (ent->colormap != delta->colormap)
226 if (ent->skin != delta->skin)
228 if (ent->alpha != delta->alpha)
230 if (ent->scale != delta->scale)
232 if (ent->glowsize != delta->glowsize)
234 if (ent->glowcolor != delta->glowcolor)
236 if (ent->flags != delta->flags)
239 if (bits) // don't send anything if it hasn't changed
241 if (bits & 0xFF000000)
243 if (bits & 0x00FF0000)
245 if (bits & 0x0000FF00)
248 MSG_WriteShort(msg, number);
249 MSG_WriteByte(msg, bits & 0xFF);
250 if (bits & E_EXTEND1)
252 MSG_WriteByte(msg, (bits >> 8) & 0xFF);
253 if (bits & E_EXTEND2)
255 MSG_WriteByte(msg, (bits >> 16) & 0xFF);
256 if (bits & E_EXTEND3)
257 MSG_WriteByte(msg, (bits >> 24) & 0xFF);
260 // LordHavoc: have to write flags first, as they can modify protocol
262 MSG_WriteByte(msg, ent->flags);
263 if (ent->flags & RENDER_LOWPRECISION)
265 if (bits & E_ORIGIN1)
266 MSG_WriteShort(msg, ent->origin[0]);
267 if (bits & E_ORIGIN2)
268 MSG_WriteShort(msg, ent->origin[1]);
269 if (bits & E_ORIGIN3)
270 MSG_WriteShort(msg, ent->origin[2]);
274 if (bits & E_ORIGIN1)
275 MSG_WriteFloat(msg, ent->origin[0]);
276 if (bits & E_ORIGIN2)
277 MSG_WriteFloat(msg, ent->origin[1]);
278 if (bits & E_ORIGIN3)
279 MSG_WriteFloat(msg, ent->origin[2]);
282 MSG_WriteAngle(msg, ent->angles[0]);
284 MSG_WriteAngle(msg, ent->angles[1]);
286 MSG_WriteAngle(msg, ent->angles[2]);
288 MSG_WriteByte(msg, ent->modelindex & 0xFF);
290 MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
292 MSG_WriteByte(msg, ent->frame & 0xFF);
294 MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
295 if (bits & E_EFFECTS1)
296 MSG_WriteByte(msg, ent->effects & 0xFF);
297 if (bits & E_EFFECTS2)
298 MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
299 if (bits & E_COLORMAP)
300 MSG_WriteByte(msg, ent->colormap);
302 MSG_WriteByte(msg, ent->skin);
304 MSG_WriteByte(msg, ent->alpha);
306 MSG_WriteByte(msg, ent->scale);
307 if (bits & E_GLOWSIZE)
308 MSG_WriteByte(msg, ent->glowsize);
309 if (bits & E_GLOWCOLOR)
310 MSG_WriteByte(msg, ent->glowcolor);
313 for (;onum < o->numentities;onum++)
315 // write remove message
316 MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
318 MSG_WriteShort(msg, 0xFFFF);
321 // (client) reads a frame from network stream
322 void EntityFrame_Read(entity_database_t *d)
324 int number, removed, bits;
325 entity_frame_t framedata, *f = &framedata, deltaframedata, *delta = &deltaframedata;
326 entity_state_t *e, baseline, *old, *oldend;
328 ClearStateToDefault(&baseline);
330 EntityFrame_Clear(f, NULL);
332 // read the frame header info
333 f->time = cl.mtime[0];
334 number = MSG_ReadLong();
335 f->framenum = MSG_ReadLong();
336 f->eye[0] = MSG_ReadFloat();
337 f->eye[1] = MSG_ReadFloat();
338 f->eye[2] = MSG_ReadFloat();
339 EntityFrame_AckFrame(d, number);
340 EntityFrame_FetchFrame(d, number, delta);
341 old = delta->entitydata;
342 oldend = old + delta->numentities;
343 // read entities until we hit the magic 0xFFFF end tag
344 while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF)
347 Host_Error("EntityFrame_Read: read error\n");
348 removed = number & 0x8000;
350 if (number >= MAX_EDICTS)
351 Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)\n", number, MAX_EDICTS);
353 // seek to entity, while copying any skipped entities (assume unchanged)
354 while (old < oldend && old->number < number)
356 if (f->numentities >= MAX_ENTITY_DATABASE)
357 Host_Error("EntityFrame_Read: entity list too big\n");
358 memcpy(f->entitydata + f->numentities, old, sizeof(entity_state_t));
359 f->entitydata[f->numentities].time = cl.mtime[0];
365 if (old < oldend && old->number == number)
368 Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
372 if (f->numentities >= MAX_ENTITY_DATABASE)
373 Host_Error("EntityFrame_Read: entity list too big\n");
376 e = f->entitydata + f->numentities++;
378 if (old < oldend && old->number == number)
380 // delta from old entity
381 memcpy(e, old++, sizeof(*e));
385 // delta from baseline
386 memcpy(e, &baseline, sizeof(*e));
390 e->time = cl.mtime[0];
393 bits = MSG_ReadByte();
394 if (bits & E_EXTEND1)
396 bits |= MSG_ReadByte() << 8;
397 if (bits & E_EXTEND2)
399 bits |= MSG_ReadByte() << 16;
400 if (bits & E_EXTEND3)
401 bits |= MSG_ReadByte() << 24;
405 if (dpprotocol == DPPROTOCOL_VERSION2)
407 if (bits & E_ORIGIN1)
408 e->origin[0] = (signed short) MSG_ReadShort();
409 if (bits & E_ORIGIN2)
410 e->origin[1] = (signed short) MSG_ReadShort();
411 if (bits & E_ORIGIN3)
412 e->origin[2] = (signed short) MSG_ReadShort();
417 e->flags = MSG_ReadByte();
418 if (e->flags & RENDER_LOWPRECISION || dpprotocol == DPPROTOCOL_VERSION2)
420 if (bits & E_ORIGIN1)
421 e->origin[0] = (signed short) MSG_ReadShort();
422 if (bits & E_ORIGIN2)
423 e->origin[1] = (signed short) MSG_ReadShort();
424 if (bits & E_ORIGIN3)
425 e->origin[2] = (signed short) MSG_ReadShort();
429 if (bits & E_ORIGIN1)
430 e->origin[0] = MSG_ReadFloat();
431 if (bits & E_ORIGIN2)
432 e->origin[1] = MSG_ReadFloat();
433 if (bits & E_ORIGIN3)
434 e->origin[2] = MSG_ReadFloat();
438 e->angles[0] = MSG_ReadAngle();
440 e->angles[1] = MSG_ReadAngle();
442 e->angles[2] = MSG_ReadAngle();
444 e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
446 e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
448 e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
450 e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
451 if (bits & E_EFFECTS1)
452 e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
453 if (bits & E_EFFECTS2)
454 e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
455 if (bits & E_COLORMAP)
456 e->colormap = MSG_ReadByte();
458 e->skin = MSG_ReadByte();
460 e->alpha = MSG_ReadByte();
462 e->scale = MSG_ReadByte();
463 if (bits & E_GLOWSIZE)
464 e->glowsize = MSG_ReadByte();
465 if (bits & E_GLOWCOLOR)
466 e->glowcolor = MSG_ReadByte();
467 if (dpprotocol == DPPROTOCOL_VERSION2)
469 e->flags = MSG_ReadByte();
474 if (f->numentities >= MAX_ENTITY_DATABASE)
475 Host_Error("EntityFrame_Read: entity list too big\n");
476 memcpy(f->entitydata + f->numentities, old, sizeof(entity_state_t));
477 f->entitydata[f->numentities].time = cl.mtime[0];
481 EntityFrame_AddFrame(d, f);
485 // (client) reads (and interpolates) the eye location from the database,
486 // given a current time
487 int EntityFrame_FetchEye(entity_database_t *d, vec3_t eye, double time)
490 if (d->numframes == 0)
492 // Host_Error("EntityFrame_FetchEye: no frames\n");
493 if (d->numframes > 1 && d->frames[d->numframes - 2].time != d->frames[d->numframes - 1].time)
495 frac = (time - d->frames[d->numframes - 2].time) / (d->frames[d->numframes - 1].time - d->frames[d->numframes - 2].time);
496 frac = bound(0, frac, 1);
497 VectorSubtract(d->frames[d->numframes - 2].eye, d->frames[d->numframes - 1].eye, eye);
498 VectorMA(d->frames[d->numframes - 2].eye, frac, eye, eye);
501 VectorCopy(d->frames[0].eye, eye);
505 // (client) fetchs an entity from a frame, index is the index into the frame's entity list, returns false if index is out of bounds
506 int EntityFrame_FetchEntityByIndex(entity_frame_t *f, entity_state_t *e, int index)
508 if (index < 0 || index >= f->numentities)
510 memcpy(e, f->entitydata + index, sizeof(*e));
514 int EntityFrame_FetchEntityByNumber(entity_frame_t *f, entity_state_t *e, int number)
517 for (i = 0;i < f->numentities;i++)
519 if (f->entitydata[i].number == number)
521 memcpy(e, f->entitydata + i, sizeof(*e));
525 ClearStateToDefault(e);
530 // (client) returns the frame number of the most recent frame recieved
531 int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d)
534 return d->frames[d->numframes - 1].framenum;