X-Git-Url: http://de.git.xonotic.org/?a=blobdiff_plain;f=protocol.c;h=acb560bfc1167324ccce843d51a46dc069ac7ef0;hb=b249b64acbbfaec2526203fb44fc1f6cb47b42fa;hp=c212757163f7636203fd108f12d4307e3f771a14;hpb=c2995f2c4c030b1c3adb163fd84b4ea5b3d2b104;p=xonotic%2Fdarkplaces.git

diff --git a/protocol.c b/protocol.c
index c2127571..acb560bf 100644
--- a/protocol.c
+++ b/protocol.c
@@ -1,65 +1,937 @@
 
 #include "quakedef.h"
 
+entity_state_t defaultstate =
+{
+	0,//double time; // time this state was built
+	{0,0,0},//vec3_t origin;
+	{0,0,0},//vec3_t angles;
+	0,//int number; // entity number this state is for
+	0,//unsigned short active; // true if a valid state
+	0,//unsigned short modelindex;
+	0,//unsigned short frame;
+	0,//unsigned short effects;
+	0,//unsigned short tagentity;
+	0,//unsigned short specialvisibilityradius;
+	0,//unsigned short viewmodelforclient;
+	0,//unsigned short exteriormodelforclient;
+	0,//unsigned short nodrawtoclient;
+	0,//unsigned short drawonlytoclient;
+	{0,0,0,0},//short light[4];
+	0,//qbyte lightstyle;
+	0,//qbyte lightpflags;
+	0,//qbyte colormap;
+	0,//qbyte skin;
+	255,//qbyte alpha;
+	16,//qbyte scale;
+	0,//qbyte glowsize;
+	254,//qbyte glowcolor;
+	0,//qbyte flags;
+	0,//qbyte tagindex;
+	{0,0,0,0,0,0}//qbyte unused[6];
+};
+
 void ClearStateToDefault(entity_state_t *s)
 {
-	s->time = 0;
-	VectorClear(s->origin);
-	VectorClear(s->angles);
-	s->effects = 0;
-	s->modelindex = 0;
-	s->frame = 0;
-	s->colormap = 0;
-	s->skin = 0;
+	*s = defaultstate;
+	/*
+	memset(s, 0, sizeof(*s));
 	s->alpha = 255;
 	s->scale = 16;
-	s->glowsize = 0;
 	s->glowcolor = 254;
-	s->flags = 0;
-	s->active = 0;
+	*/
+}
+
+void EntityState_Write(entity_state_t *ent, sizebuf_t *msg, entity_state_t *delta)
+{
+	int bits;
+	vec3_t org, deltaorg;
+	if (ent->active)
+	{
+		// if not active last frame, delta from defaults
+		if (!delta->active)
+			delta = &defaultstate;
+		bits = 0;
+		VectorCopy(ent->origin, org);
+		VectorCopy(delta->origin, deltaorg);
+		if (ent->flags & RENDER_LOWPRECISION)
+		{
+			if (org[0] > 0)
+				org[0] = (int) (org[0] + 0.5f);
+			else
+				org[0] = (int) (org[0] - 0.5f);
+			if (org[1] > 0)
+				org[1] = (int) (org[1] + 0.5f);
+			else
+				org[1] = (int) (org[1] - 0.5f);
+			if (org[2] > 0)
+				org[2] = (int) (org[2] + 0.5f);
+			else
+				org[2] = (int) (org[2] - 0.5f);
+		}
+		if (delta->flags & RENDER_LOWPRECISION)
+		{
+			if (deltaorg[0] > 0)
+				deltaorg[0] = (int) (deltaorg[0] + 0.5f);
+			else
+				deltaorg[0] = (int) (deltaorg[0] - 0.5f);
+			if (deltaorg[1] > 0)
+				deltaorg[1] = (int) (deltaorg[1] + 0.5f);
+			else
+				deltaorg[1] = (int) (deltaorg[1] - 0.5f);
+			if (deltaorg[2] > 0)
+				deltaorg[2] = (int) (deltaorg[2] + 0.5f);
+			else
+				deltaorg[2] = (int) (deltaorg[2] - 0.5f);
+		}
+		if (fabs(org[0] - deltaorg[0]) > 0.01f)
+			bits |= E_ORIGIN1;
+		if (fabs(org[1] - deltaorg[1]) > 0.01f)
+			bits |= E_ORIGIN2;
+		if (fabs(org[2] - deltaorg[2]) > 0.01f)
+			bits |= E_ORIGIN3;
+		if ((qbyte) (ent->angles[0] * (256.0f / 360.0f)) != (qbyte) (delta->angles[0] * (256.0f / 360.0f)))
+			bits |= E_ANGLE1;
+		if ((qbyte) (ent->angles[1] * (256.0f / 360.0f)) != (qbyte) (delta->angles[1] * (256.0f / 360.0f)))
+			bits |= E_ANGLE2;
+		if ((qbyte) (ent->angles[2] * (256.0f / 360.0f)) != (qbyte) (delta->angles[2] * (256.0f / 360.0f)))
+			bits |= E_ANGLE3;
+		if ((ent->modelindex ^ delta->modelindex) & 0x00FF)
+			bits |= E_MODEL1;
+		if ((ent->modelindex ^ delta->modelindex) & 0xFF00)
+			bits |= E_MODEL2;
+		if ((ent->frame ^ delta->frame) & 0x00FF)
+			bits |= E_FRAME1;
+		if ((ent->frame ^ delta->frame) & 0xFF00)
+			bits |= E_FRAME2;
+		if ((ent->effects ^ delta->effects) & 0x00FF)
+			bits |= E_EFFECTS1;
+		if ((ent->effects ^ delta->effects) & 0xFF00)
+			bits |= E_EFFECTS2;
+		if (ent->colormap != delta->colormap)
+			bits |= E_COLORMAP;
+		if (ent->skin != delta->skin)
+			bits |= E_SKIN;
+		if (ent->alpha != delta->alpha)
+			bits |= E_ALPHA;
+		if (ent->scale != delta->scale)
+			bits |= E_SCALE;
+		if (ent->glowsize != delta->glowsize)
+			bits |= E_GLOWSIZE;
+		if (ent->glowcolor != delta->glowcolor)
+			bits |= E_GLOWCOLOR;
+		if (ent->flags != delta->flags)
+			bits |= E_FLAGS;
+		if (ent->tagindex != delta->tagindex || ent->tagentity != delta->tagentity)
+			bits |= E_TAGATTACHMENT;
+		if (ent->light[0] != delta->light[0] || ent->light[1] != delta->light[1] || ent->light[2] != delta->light[2] || ent->light[3] != delta->light[3])
+			bits |= E_LIGHT;
+		if (ent->lightstyle != delta->lightstyle)
+			bits |= E_LIGHTSTYLE;
+		if (ent->lightpflags != delta->lightpflags)
+			bits |= E_LIGHTPFLAGS;
+
+		if (bits) // don't send anything if it hasn't changed
+		{
+			if (bits & 0xFF000000)
+				bits |= E_EXTEND3;
+			if (bits & 0x00FF0000)
+				bits |= E_EXTEND2;
+			if (bits & 0x0000FF00)
+				bits |= E_EXTEND1;
+
+			MSG_WriteShort(msg, ent->number);
+			MSG_WriteByte(msg, bits & 0xFF);
+			if (bits & E_EXTEND1)
+			{
+				MSG_WriteByte(msg, (bits >> 8) & 0xFF);
+				if (bits & E_EXTEND2)
+				{
+					MSG_WriteByte(msg, (bits >> 16) & 0xFF);
+					if (bits & E_EXTEND3)
+						MSG_WriteByte(msg, (bits >> 24) & 0xFF);
+				}
+			}
+			// LordHavoc: have to write flags first, as they can modify protocol
+			if (bits & E_FLAGS)
+				MSG_WriteByte(msg, ent->flags);
+			if (ent->flags & RENDER_LOWPRECISION)
+			{
+				if (bits & E_ORIGIN1)
+					MSG_WriteShort(msg, org[0]);
+				if (bits & E_ORIGIN2)
+					MSG_WriteShort(msg, org[1]);
+				if (bits & E_ORIGIN3)
+					MSG_WriteShort(msg, org[2]);
+				if (bits & E_ANGLE1)
+					MSG_WriteAngle(msg, ent->angles[0]);
+				if (bits & E_ANGLE2)
+					MSG_WriteAngle(msg, ent->angles[1]);
+				if (bits & E_ANGLE3)
+					MSG_WriteAngle(msg, ent->angles[2]);
+			}
+			else
+			{
+				if (bits & E_ORIGIN1)
+					MSG_WriteFloat(msg, org[0]);
+				if (bits & E_ORIGIN2)
+					MSG_WriteFloat(msg, org[1]);
+				if (bits & E_ORIGIN3)
+					MSG_WriteFloat(msg, org[2]);
+				if (bits & E_ANGLE1)
+					MSG_WritePreciseAngle(msg, ent->angles[0]);
+				if (bits & E_ANGLE2)
+					MSG_WritePreciseAngle(msg, ent->angles[1]);
+				if (bits & E_ANGLE3)
+					MSG_WritePreciseAngle(msg, ent->angles[2]);
+			}
+			if (bits & E_MODEL1)
+				MSG_WriteByte(msg, ent->modelindex & 0xFF);
+			if (bits & E_MODEL2)
+				MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
+			if (bits & E_FRAME1)
+				MSG_WriteByte(msg, ent->frame & 0xFF);
+			if (bits & E_FRAME2)
+				MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
+			if (bits & E_EFFECTS1)
+				MSG_WriteByte(msg, ent->effects & 0xFF);
+			if (bits & E_EFFECTS2)
+				MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
+			if (bits & E_COLORMAP)
+				MSG_WriteByte(msg, ent->colormap);
+			if (bits & E_SKIN)
+				MSG_WriteByte(msg, ent->skin);
+			if (bits & E_ALPHA)
+				MSG_WriteByte(msg, ent->alpha);
+			if (bits & E_SCALE)
+				MSG_WriteByte(msg, ent->scale);
+			if (bits & E_GLOWSIZE)
+				MSG_WriteByte(msg, ent->glowsize);
+			if (bits & E_GLOWCOLOR)
+				MSG_WriteByte(msg, ent->glowcolor);
+			if (bits & E_TAGATTACHMENT)
+			{
+				MSG_WriteShort(msg, ent->tagentity);
+				MSG_WriteByte(msg, ent->tagindex);
+			}
+			if (bits & E_LIGHT)
+			{
+				MSG_WriteShort(msg, ent->light[0]);
+				MSG_WriteShort(msg, ent->light[1]);
+				MSG_WriteShort(msg, ent->light[2]);
+				MSG_WriteShort(msg, ent->light[3]);
+			}
+			if (bits & E_LIGHTSTYLE)
+				MSG_WriteByte(msg, ent->lightstyle);
+			if (bits & E_LIGHTPFLAGS)
+				MSG_WriteByte(msg, ent->lightpflags);
+		}
+	}
+	else if (delta->active)
+		MSG_WriteShort(msg, ent->number | 0x8000);
+}
+
+void EntityState_ReadUpdate(entity_state_t *e, int number)
+{
+	int bits;
+	cl_entities_active[number] = true;
+	e->active = true;
+	e->time = cl.mtime[0];
+	e->number = number;
+
+	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 (cl.protocol == PROTOCOL_DARKPLACES2)
+	{
+		if (bits & E_ORIGIN1)
+			e->origin[0] = (signed short) MSG_ReadShort();
+		if (bits & E_ORIGIN2)
+			e->origin[1] = (signed short) MSG_ReadShort();
+		if (bits & E_ORIGIN3)
+			e->origin[2] = (signed short) MSG_ReadShort();
+	}
+	else
+	{
+		if (bits & E_FLAGS)
+			e->flags = MSG_ReadByte();
+		if (e->flags & RENDER_LOWPRECISION || cl.protocol == PROTOCOL_DARKPLACES2)
+		{
+			if (bits & E_ORIGIN1)
+				e->origin[0] = (signed short) MSG_ReadShort();
+			if (bits & E_ORIGIN2)
+				e->origin[1] = (signed short) MSG_ReadShort();
+			if (bits & E_ORIGIN3)
+				e->origin[2] = (signed short) MSG_ReadShort();
+		}
+		else
+		{
+			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 (cl.protocol == PROTOCOL_DARKPLACES5 && !(e->flags & RENDER_LOWPRECISION))
+	{
+		if (bits & E_ANGLE1)
+			e->angles[0] = MSG_ReadPreciseAngle();
+		if (bits & E_ANGLE2)
+			e->angles[1] = MSG_ReadPreciseAngle();
+		if (bits & E_ANGLE3)
+			e->angles[2] = MSG_ReadPreciseAngle();
+	}
+	else
+	{
+		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) | (unsigned int) MSG_ReadByte();
+	if (bits & E_MODEL2)
+		e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
+	if (bits & E_FRAME1)
+		e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
+	if (bits & E_FRAME2)
+		e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
+	if (bits & E_EFFECTS1)
+		e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
+	if (bits & E_EFFECTS2)
+		e->effects = (e->effects & 0x00FF) | ((unsigned int) 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 (cl.protocol == PROTOCOL_DARKPLACES2)
+		if (bits & E_FLAGS)
+			e->flags = MSG_ReadByte();
+	if (bits & E_TAGATTACHMENT)
+	{
+		e->tagentity = MSG_ReadShort();
+		e->tagindex = MSG_ReadByte();
+	}
+	if (bits & E_LIGHT)
+	{
+		e->light[0] = MSG_ReadShort();
+		e->light[1] = MSG_ReadShort();
+		e->light[2] = MSG_ReadShort();
+		e->light[3] = MSG_ReadShort();
+	}
+	if (bits & E_LIGHTSTYLE)
+		e->lightstyle = MSG_ReadByte();
+	if (bits & E_LIGHTPFLAGS)
+		e->lightpflags = MSG_ReadByte();
+
+	if (developer_networkentities.integer >= 2)
+	{
+		Con_Printf("ReadUpdate e%i", number);
+
+		if (bits & E_ORIGIN1)
+			Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
+		if (bits & E_ORIGIN2)
+			Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
+		if (bits & E_ORIGIN3)
+			Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
+		if (bits & E_ANGLE1)
+			Con_Printf(" E_ANGLE1 %f", e->angles[0]);
+		if (bits & E_ANGLE2)
+			Con_Printf(" E_ANGLE2 %f", e->angles[1]);
+		if (bits & E_ANGLE3)
+			Con_Printf(" E_ANGLE3 %f", e->angles[2]);
+		if (bits & (E_MODEL1 | E_MODEL2))
+			Con_Printf(" E_MODEL %i", e->modelindex);
+
+		if (bits & (E_FRAME1 | E_FRAME2))
+			Con_Printf(" E_FRAME %i", e->frame);
+		if (bits & (E_EFFECTS1 | E_EFFECTS2))
+			Con_Printf(" E_EFFECTS %i", e->effects);
+		if (bits & E_ALPHA)
+			Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
+		if (bits & E_SCALE)
+			Con_Printf(" E_SCALE %f", e->scale / 16.0f);
+		if (bits & E_COLORMAP)
+			Con_Printf(" E_COLORMAP %i", e->colormap);
+		if (bits & E_SKIN)
+			Con_Printf(" E_SKIN %i", e->skin);
+
+		if (bits & E_GLOWSIZE)
+			Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
+		if (bits & E_GLOWCOLOR)
+			Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
+		
+		if (bits & E_LIGHT)
+			Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
+		if (bits & E_LIGHTPFLAGS)			
+			Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
+
+		if (bits & E_TAGATTACHMENT)
+			Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
+		if (bits & E_LIGHTSTYLE)
+			Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
+		Con_Print("\n");
+	}
 }
 
 // (server) clears the database to contain no frames (thus delta compression compresses against nothing)
 void EntityFrame_ClearDatabase(entity_database_t *d)
 {
 	memset(d, 0, sizeof(*d));
-	d->ackframe = -1;
 }
 
-// (server) acknowledge a frame as recieved by client (removes old frames from database, will use this new frame for delta compression)
+// (server and client) removes frames older than 'frame' from database
 void EntityFrame_AckFrame(entity_database_t *d, int frame)
 {
+	int i;
+	if (d->ackframe < frame)
+		d->ackframe = frame;
+	for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
+	// ignore outdated frame acks (out of order packets)
+	if (i == 0)
+		return;
+	d->numframes -= i;
+	// if some queue is left, slide it down to beginning of array
+	if (d->numframes)
+		memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
 }
 
 // (server) clears frame, to prepare for adding entities
-void EntityFrame_Clear(entity_frame_t *f)
+void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
 {
-	memset(f, 0, sizeof(*f));
+	f->time = 0;
+	f->framenum = framenum;
+	f->numentities = 0;
+	if (eye == NULL)
+	{
+		VectorClear(f->eye);
+	}
+	else
+	{
+		VectorCopy(eye, f->eye);
+	}
 }
 
-// (server) allocates an entity slot in frame, returns NULL if full
-entity_state_t *EntityFrame_NewEntity(entity_frame_t *f, int number)
+// (server) adds an entity to frame
+void EntityFrame_AddEntity(entity_frame_t *f, entity_state_t *s)
 {
-	entity_state_t *e;
-	if (f->numentities >= MAX_ENTITY_DATABASE)
-		return NULL;
-	e = &f->entitydata[f->numentities++];
-	e->active = true;
-	e->number = number;
-	return e;
+	if (f->numentities < MAX_ENTITY_DATABASE)
+	{
+		f->entitydata[f->numentities] = *s;
+		f->entitydata[f->numentities++].active = true;
+	}
+}
+
+// (server and client) reads a frame from the database
+void EntityFrame_FetchFrame(entity_database_t *d, int framenum, entity_frame_t *f)
+{
+	int i, n;
+	EntityFrame_Clear(f, NULL, -1);
+	for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
+	if (i < d->numframes && framenum == d->frames[i].framenum)
+	{
+		f->framenum = framenum;
+		f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
+		n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
+		if (n > f->numentities)
+			n = f->numentities;
+		memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
+		if (f->numentities > n)
+			memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
+		VectorCopy(d->eye, f->eye);
+	}
+}
+
+// (server and client) adds a entity_frame to the database, for future reference
+void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f)
+{
+	int n, e;
+	entity_frameinfo_t *info;
+
+	VectorCopy(f->eye, d->eye);
+
+	// figure out how many entity slots are used already
+	if (d->numframes)
+	{
+		n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
+		if (n + f->numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
+		{
+			// ran out of room, dump database
+			EntityFrame_ClearDatabase(d);
+		}
+	}
+
+	info = &d->frames[d->numframes];
+	info->framenum = f->framenum;
+	e = -1000;
+	// make sure we check the newly added frame as well, but we haven't incremented numframes yet
+	for (n = 0;n <= d->numframes;n++)
+	{
+		if (e >= d->frames[n].framenum)
+		{
+			if (e == f->framenum)
+				Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
+			else
+				Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
+			return;
+		}
+		e = d->frames[n].framenum;
+	}
+	// if database still has frames after that...
+	if (d->numframes)
+		info->firstentity = d->frames[d->numframes - 1].endentity;
+	else
+		info->firstentity = 0;
+	info->endentity = info->firstentity + f->numentities;
+	d->numframes++;
+
+	n = info->firstentity % MAX_ENTITY_DATABASE;
+	e = MAX_ENTITY_DATABASE - n;
+	if (e > f->numentities)
+		e = f->numentities;
+	memcpy(d->entitydata + n, f->entitydata, sizeof(entity_state_t) * e);
+	if (f->numentities > e)
+		memcpy(d->entitydata, f->entitydata + e, sizeof(entity_state_t) * (f->numentities - e));
 }
 
 // (server) writes a frame to network stream
-void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, int deltaframe, int newframe, sizebuf_t *msg)
+static entity_frame_t deltaframe; // FIXME?
+void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
 {
+	int i, onum, number;
+	entity_frame_t *o = &deltaframe;
+	entity_state_t *ent, *delta;
+
+	EntityFrame_AddFrame(d, f);
+
+	EntityFrame_FetchFrame(d, d->ackframe > 0 ? d->ackframe : -1, o);
+	MSG_WriteByte (msg, svc_entities);
+	MSG_WriteLong (msg, o->framenum);
+	MSG_WriteLong (msg, f->framenum);
+	MSG_WriteFloat (msg, f->eye[0]);
+	MSG_WriteFloat (msg, f->eye[1]);
+	MSG_WriteFloat (msg, f->eye[2]);
+
+	onum = 0;
+	for (i = 0;i < f->numentities;i++)
+	{
+		ent = f->entitydata + i;
+		number = ent->number;
+		for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
+		{
+			// write remove message
+			MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
+		}
+		if (onum < o->numentities && (o->entitydata[onum].number == number))
+		{
+			// delta from previous frame
+			delta = o->entitydata + onum;
+			// advance to next entity in delta frame
+			onum++;
+		}
+		else
+		{
+			// delta from defaults
+			delta = &defaultstate;
+		}
+		EntityState_Write(ent, msg, delta);
+	}
+	for (;onum < o->numentities;onum++)
+	{
+		// write remove message
+		MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
+	}
+	MSG_WriteShort(msg, 0xFFFF);
 }
 
 // (client) reads a frame from network stream
-void EntityFrame_Read(entity_database_t *d, entity_frame_t *f)
+static entity_frame_t framedata; // FIXME?
+void EntityFrame_Read(entity_database_t *d)
+{
+	int number, removed;
+	entity_frame_t *f = &framedata, *delta = &deltaframe;
+	entity_state_t *e, *old, *oldend;
+
+	EntityFrame_Clear(f, NULL, -1);
+
+	// read the frame header info
+	f->time = cl.mtime[0];
+	number = MSG_ReadLong();
+	f->framenum = MSG_ReadLong();
+	f->eye[0] = MSG_ReadFloat();
+	f->eye[1] = MSG_ReadFloat();
+	f->eye[2] = MSG_ReadFloat();
+	EntityFrame_AckFrame(d, number);
+	EntityFrame_FetchFrame(d, number, delta);
+	old = delta->entitydata;
+	oldend = old + delta->numentities;
+	// read entities until we hit the magic 0xFFFF end tag
+	while ((number = (unsigned short) 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 (old < oldend && old->number < number)
+		{
+			if (f->numentities >= MAX_ENTITY_DATABASE)
+				Host_Error("EntityFrame_Read: entity list too big\n");
+			f->entitydata[f->numentities] = *old++;
+			f->entitydata[f->numentities++].time = cl.mtime[0];
+		}
+		if (removed)
+		{
+			if (old < oldend && old->number == number)
+				old++;
+			else
+				Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
+		}
+		else
+		{
+			if (f->numentities >= MAX_ENTITY_DATABASE)
+				Host_Error("EntityFrame_Read: entity list too big\n");
+
+			// reserve this slot
+			e = f->entitydata + f->numentities++;
+
+			if (old < oldend && old->number == number)
+			{
+				// delta from old entity
+				*e = *old++;
+			}
+			else
+			{
+				// delta from defaults
+				*e = defaultstate;
+			}
+
+			EntityState_ReadUpdate(e, number);
+		}
+	}
+	while (old < oldend)
+	{
+		if (f->numentities >= MAX_ENTITY_DATABASE)
+			Host_Error("EntityFrame_Read: entity list too big\n");
+		f->entitydata[f->numentities] = *old++;
+		f->entitydata[f->numentities++].time = cl.mtime[0];
+	}
+	EntityFrame_AddFrame(d, f);
+}
+
+
+// (client) returns the frame number of the most recent frame recieved
+int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d)
+{
+	if (d->numframes)
+		return d->frames[d->numframes - 1].framenum;
+	else
+		return -1;
+}
+
+
+
+
+
+
+entity_state_t *EntityFrame4_GetReferenceEntity(entity_database4_t *d, int number)
+{
+	if (d->maxreferenceentities <= number)
+	{
+		int oldmax = d->maxreferenceentities;
+		entity_state_t *oldentity = d->referenceentity;
+		d->maxreferenceentities = (number + 15) & ~7;
+		d->referenceentity = Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
+		if (oldentity)
+		{
+			memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
+			Mem_Free(oldentity);
+		}
+		// clear the newly created entities
+		for (;oldmax < d->maxreferenceentities;oldmax++)
+		{
+			d->referenceentity[oldmax] = defaultstate;
+			d->referenceentity[oldmax].number = oldmax;
+		}
+	}
+	return d->referenceentity + number;
+}
+
+void EntityFrame4_AddCommitEntity(entity_database4_t *d, entity_state_t *s)
 {
+	// resize commit's entity list if full
+	if (d->currentcommit->maxentities <= d->currentcommit->numentities)
+	{
+		entity_state_t *oldentity = d->currentcommit->entity;
+		d->currentcommit->maxentities += 8;
+		d->currentcommit->entity = Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
+		if (oldentity)
+		{
+			memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
+			Mem_Free(oldentity);
+		}
+	}
+	d->currentcommit->entity[d->currentcommit->numentities++] = *s;
 }
 
-// (client) fetchs an entity from the database, read with _Read, fills in structs for current and previous state
-void EntityFrame_FetchEntity(entity_database_t *d, entity_state_t *previous, entity_state_t *current)
+entity_database4_t *EntityFrame4_AllocDatabase(mempool_t *pool)
 {
+	entity_database4_t *d;
+	d = Mem_Alloc(pool, sizeof(*d));
+	d->mempool = pool;
+	EntityFrame4_ResetDatabase(d);
+	d->ackframenum = -1;
+	return d;
 }
+
+void EntityFrame4_FreeDatabase(entity_database4_t *d)
+{
+	int i;
+	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
+		if (d->commit[i].entity)
+			Mem_Free(d->commit[i].entity);
+	if (d->referenceentity)
+		Mem_Free(d->referenceentity);
+	Mem_Free(d);
+}
+
+void EntityFrame4_ResetDatabase(entity_database4_t *d)
+{
+	int i;
+	d->ackframenum = -1;
+	d->referenceframenum = -1;
+	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
+		d->commit[i].numentities = 0;
+	for (i = 0;i < d->maxreferenceentities;i++)
+		d->referenceentity[i] = defaultstate;
+}
+
+int EntityFrame4_AckFrame(entity_database4_t *d, int framenum)
+{
+	int i, j, found;
+	entity_database4_commit_t *commit;
+	if (framenum == -1)
+	{
+		// reset reference, but leave commits alone
+		d->referenceframenum = -1;
+		for (i = 0;i < d->maxreferenceentities;i++)
+			d->referenceentity[i] = defaultstate;
+		found = true;
+	}
+	else if (d->referenceframenum == framenum)
+		found = true;
+	else
+	{
+		found = false;
+		for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
+		{
+			if (commit->numentities && commit->framenum <= framenum)
+			{
+				if (commit->framenum == framenum)
+				{
+					found = true;
+					d->referenceframenum = framenum;
+					if (developer_networkentities.integer >= 3)
+					{
+						for (j = 0;j < commit->numentities;j++)
+						{
+							entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
+							if (commit->entity[j].active != s->active)
+							{
+								if (commit->entity[j].active)
+									Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
+								else
+									Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
+							}
+							*s = commit->entity[j];
+						}
+					}
+					else
+						for (j = 0;j < commit->numentities;j++)
+							*EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
+				}
+				commit->numentities = 0;
+			}
+		}
+	}
+	if (developer_networkentities.integer >= 1)
+	{
+		Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
+		for (i = 0;i < MAX_ENTITY_HISTORY;i++)
+			if (d->commit[i].numentities)
+				Con_Printf(" %i", d->commit[i].framenum);
+		Con_Print("\n");
+	}
+	return found;
+}
+
+int EntityFrame4_SV_WriteFrame_Entity(entity_database4_t *d, sizebuf_t *msg, int maxbytes, entity_state_t *s)
+{
+	qbyte data[128];
+	sizebuf_t buf;
+	entity_state_t *e;
+	// prepare the buffer
+	memset(&buf, 0, sizeof(buf));
+	buf.data = data;
+	buf.maxsize = sizeof(data);
+	// make the message
+	e = EntityFrame4_GetReferenceEntity(d, s->number);
+	// send an update (may update or remove the entity)
+	EntityState_Write(s, &buf, e);
+	// if the message is empty, skip out now
+	if (!buf.cursize)
+		return true;
+	// if the commit is full, we're done
+	if (msg->cursize + buf.cursize + 2 >= min(msg->maxsize, maxbytes))
+		return false;
+	// add the entity to the commit
+	EntityFrame4_AddCommitEntity(d, s);
+	// write the message to the packet
+	SZ_Write(msg, buf.data, buf.cursize);
+	// carry on
+	return true;
+}
+
+extern void CL_MoveLerpEntityStates(entity_t *ent);
+void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
+{
+	int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
+	// read the number of the frame this refers to
+	referenceframenum = MSG_ReadLong();
+	// read the number of this frame
+	framenum = MSG_ReadLong();
+	// read the start number
+	enumber = MSG_ReadShort();
+	if (developer_networkentities.integer >= 1)
+	{
+		Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
+		for (i = 0;i < MAX_ENTITY_HISTORY;i++)
+			if (d->commit[i].numentities)
+				Con_Printf(" %i", d->commit[i].framenum);
+		Con_Print("\n");
+	}
+	if (!EntityFrame4_AckFrame(d, referenceframenum))
+	{
+		Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
+		skip = true;
+	}
+	d->currentcommit = NULL;
+	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
+	{
+		if (!d->commit[i].numentities)
+		{
+			d->currentcommit = d->commit + i;
+			d->currentcommit->framenum = d->ackframenum = framenum;
+			d->currentcommit->numentities = 0;
+		}
+	}
+	if (d->currentcommit == NULL)
+	{
+		Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
+		skip = true;
+	}
+	done = false;
+	while (!done && !msg_badread)
+	{
+		// read the number of the modified entity
+		// (gaps will be copied unmodified)
+		n = (unsigned short)MSG_ReadShort();
+		if (n == 0x8000)
+		{
+			// no more entities in this update, but we still need to copy the
+			// rest of the reference entities (final gap)
+			done = true;
+			// read end of range number, then process normally
+			n = (unsigned short)MSG_ReadShort();
+		}
+		// high bit means it's a remove message
+		cnumber = n & 0x7FFF;
+		// add one (the changed one) if not done
+		stopnumber = cnumber + !done;
+		// process entities in range from the last one to the changed one
+		for (;enumber < stopnumber;enumber++)
+		{
+			if (skip)
+			{
+				if (enumber == cnumber && (n & 0x8000) == 0)
+				{
+					entity_state_t tempstate;
+					EntityState_ReadUpdate(&tempstate, enumber);
+				}
+				continue;
+			}
+			// slide the current into the previous slot
+			cl_entities[enumber].state_previous = cl_entities[enumber].state_current;
+			// copy a new current from reference database
+			cl_entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
+			// if this is the one to modify, read more data...
+			if (enumber == cnumber)
+			{
+				if (n & 0x8000)
+				{
+					// simply removed
+					if (developer_networkentities.integer >= 2)
+						Con_Printf("entity %i: remove\n", enumber);
+					cl_entities[enumber].state_current = defaultstate;
+				}
+				else
+				{
+					// read the changes
+					if (developer_networkentities.integer >= 2)
+						Con_Printf("entity %i: update\n", enumber);
+					EntityState_ReadUpdate(&cl_entities[enumber].state_current, enumber);
+				}
+			}
+			else if (developer_networkentities.integer >= 4)
+				Con_Printf("entity %i: copy\n", enumber);
+			// fix the number (it gets wiped occasionally by copying from defaultstate)
+			cl_entities[enumber].state_current.number = enumber;
+			// check if we need to update the lerp stuff
+			if (cl_entities[enumber].state_current.active)
+			{
+				CL_MoveLerpEntityStates(&cl_entities[enumber]);
+				cl_entities_active[enumber] = true;
+			}
+			// add this to the commit entry whether it is modified or not
+			if (d->currentcommit)
+				EntityFrame4_AddCommitEntity(d, &cl_entities[enumber].state_current);
+			// print extra messages if desired
+			if (developer_networkentities.integer >= 2 && cl_entities[enumber].state_current.active != cl_entities[enumber].state_previous.active)
+			{
+				if (cl_entities[enumber].state_current.active)
+					Con_Printf("entity #%i has become active\n", enumber);
+				else if (cl_entities[enumber].state_previous.active)
+					Con_Printf("entity #%i has become inactive\n", enumber);
+			}
+		}
+	}
+	d->currentcommit = NULL;
+	if (skip)
+		EntityFrame4_ResetDatabase(d);
+}
+
+