+void EntityFrame_Read(entity_database_t *d)
+{
+ int newframenum, deltaframenum, onum, number, removed, bits;
+ entity_frame_t framedata, *f = &framedata, deltaframedata, *delta = &deltaframedata;
+ entity_state_t *e, baseline;
+
+ ClearStateToDefault(&baseline);
+ memset(f, 0, sizeof(*f));
+ // read the frame header info
+ f->time = cl.mtime[0];
+ deltaframenum = MSG_ReadLong();
+ newframenum = MSG_ReadLong();
+ f->eye[0] = MSG_ReadFloat();
+ f->eye[1] = MSG_ReadFloat();
+ f->eye[2] = MSG_ReadFloat();
+ EntityFrame_AckFrame(d, deltaframenum);
+ EntityFrame_FetchFrame(d, deltaframenum, delta);
+ f->framenum = newframenum;
+ onum = 0;
+ f->numentities = 0;
+ // read entities until we hit the magic 0xFFFF end tag
+ while ((number = MSG_ReadShort()) != 0xFFFF)
+ {
+ if (msg_badread)
+ Host_Error("EntityFrame_Read: read error\n");
+ removed = number & 0x8000;
+ number &= 0x7FFF;
+ if (number >= MAX_EDICTS)
+ Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)\n", number, MAX_EDICTS);
+
+ // seek to entity, while copying any skipped entities (assume unchanged)
+ while (onum < delta->numentities && delta->entitydata[onum].number < number)
+ {
+ if (f->numentities >= MAX_ENTITY_DATABASE)
+ Host_Error("EntityFrame_Read: entity list too big\n");
+ memcpy(f->entitydata + f->numentities, delta->entitydata + onum, sizeof(entity_state_t));
+ onum++;
+ f->numentities++;
+ }
+ if (removed)
+ {
+ if (onum < delta->numentities && delta->entitydata[onum].number == number)
+ onum++;
+ else
+ Con_Printf("EntityFrame_Read: REMOVE on unused entity!\n");
+ }
+ else
+ {
+ if (f->numentities >= MAX_ENTITY_DATABASE)
+ Host_Error("EntityFrame_Read: entity list too big\n");
+ if (onum < delta->numentities && delta->entitydata[onum].number == number)
+ {
+ // delta from old entity
+ memcpy(f->entitydata + f->numentities, delta->entitydata + onum++, sizeof(*e));
+ }
+ else
+ {
+ // delta from baseline
+ memcpy(f->entitydata + f->numentities, &baseline, sizeof(*e));
+ }
+
+ // reserve this slot
+ e = f->entitydata + f->numentities++;
+
+ e->active = true;
+ e->time = cl.mtime[0];
+
+ bits = MSG_ReadByte();
+ if (bits & E_EXTEND1)
+ {
+ bits |= MSG_ReadByte() << 8;
+ if (bits & E_EXTEND2)
+ {
+ bits |= MSG_ReadByte() << 16;
+ if (bits & E_EXTEND3)
+ bits |= MSG_ReadByte() << 24;
+ }
+ }
+
+ if (bits & E_ORIGIN1)
+ e->origin[0] = MSG_ReadFloat();
+ if (bits & E_ORIGIN2)
+ e->origin[1] = MSG_ReadFloat();
+ if (bits & E_ORIGIN3)
+ e->origin[2] = MSG_ReadFloat();
+ if (bits & E_ANGLE1)
+ e->angles[0] = MSG_ReadAngle();
+ if (bits & E_ANGLE2)
+ e->angles[1] = MSG_ReadAngle();
+ if (bits & E_ANGLE3)
+ e->angles[2] = MSG_ReadAngle();
+ if (bits & E_MODEL1)
+ e->modelindex = (e->modelindex & 0xFF00) | MSG_ReadByte();
+ if (bits & E_MODEL2)
+ e->modelindex = (e->modelindex & 0x00FF) | (MSG_ReadByte() << 8);
+ if (bits & E_FRAME1)
+ e->frame = (e->frame & 0xFF00) | MSG_ReadByte();
+ if (bits & E_FRAME2)
+ e->frame = (e->frame & 0x00FF) | (MSG_ReadByte() << 8);
+ if (bits & E_EFFECTS1)
+ e->effects = (e->effects & 0xFF00) | MSG_ReadByte();
+ if (bits & E_EFFECTS2)
+ e->effects = (e->effects & 0x00FF) | (MSG_ReadByte() << 8);
+ if (bits & E_COLORMAP)
+ e->colormap = MSG_ReadByte();
+ if (bits & E_SKIN)
+ e->skin = MSG_ReadByte();
+ if (bits & E_ALPHA)
+ e->alpha = MSG_ReadByte();
+ if (bits & E_SCALE)
+ e->scale = MSG_ReadByte();
+ if (bits & E_GLOWSIZE)
+ e->glowsize = MSG_ReadByte();
+ if (bits & E_GLOWCOLOR)
+ e->glowcolor = MSG_ReadByte();
+ if (bits & E_FLAGS)
+ e->flags = MSG_ReadByte();
+ }
+ }
+ while (onum < delta->numentities)
+ {
+ if (f->numentities >= MAX_ENTITY_DATABASE)
+ Host_Error("EntityFrame_Read: entity list too big\n");
+ memcpy(f->entitydata + f->numentities, delta->entitydata + onum, sizeof(entity_state_t));
+ onum++;
+ f->numentities++;
+ }
+ EntityFrame_AddFrame(d, f);
+}
+
+void EntityFrame_FetchEye(entity_database_t *d, vec3_t eye, double time)
+{
+ float frac;
+ if (d->numframes == 0)
+ Host_Error("EntityFrame_FetchEye: no frames\n");
+ if (d->numframes > 1 && d->frames[d->numframes - 2].time != d->frames[d->numframes - 1].time)
+ {
+ frac = (time - d->frames[d->numframes - 2].time) / (d->frames[d->numframes - 1].time - d->frames[d->numframes - 2].time);
+ frac = bound(0, frac, 1);
+ VectorSubtract(d->frames[d->numframes - 2].eye, d->frames[d->numframes - 1].eye, eye);
+ VectorMA(d->frames[d->numframes - 2].eye, frac, eye, eye);
+ }
+ else
+ VectorCopy(d->frames[0].eye, eye);
+}
+
+// (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
+int EntityFrame_FetchEntityByIndex(entity_frame_t *f, entity_state_t *e, int index)