ref: 3ba533fb9d5e013768813983fc0a4464f4ba13ac
dir: qk1/qw/sv_ents.c
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "quakedef.h"
/*
=============================================================================
The PVS must include a small area around the client to allow head bobbing
or other small motion on the client side. Otherwise, a bob might cause an
entity that should be visible to not show up, especially when the bob
crosses a waterline.
=============================================================================
*/
int fatbytes;
byte fatpvs[MAX_MAP_LEAFS/8];
void SV_AddToFatPVS (vec3_t org, mnode_t *node)
{
int i;
byte *pvs;
mplane_t *plane;
float d;
while (1)
{
// if this is a leaf, accumulate the pvs bits
if (node->contents < 0)
{
if (node->contents != CONTENTS_SOLID)
{
pvs = Mod_LeafPVS ( (mleaf_t *)node, sv.worldmodel);
for (i=0 ; i<fatbytes ; i++)
fatpvs[i] |= pvs[i];
}
return;
}
plane = node->plane;
d = DotProduct (org, plane->normal) - plane->dist;
if (d > 8)
node = node->children[0];
else if (d < -8)
node = node->children[1];
else
{ // go down both
SV_AddToFatPVS (org, node->children[0]);
node = node->children[1];
}
}
}
/*
=============
SV_FatPVS
Calculates a PVS that is the inclusive or of all leafs within 8 pixels of the
given point.
=============
*/
byte *SV_FatPVS (vec3_t org)
{
fatbytes = (sv.worldmodel->numleafs+31)>>3;
memset (fatpvs, 0, fatbytes);
SV_AddToFatPVS (org, sv.worldmodel->nodes);
return fatpvs;
}
//=============================================================================
// because there can be a lot of nails, there is a special
// network protocol for them
#define MAX_NAILS 32
edict_t *nails[MAX_NAILS];
int numnails;
extern int sv_nailmodel, sv_supernailmodel, sv_playermodel;
qboolean SV_AddNailUpdate (edict_t *ent)
{
if (ent->v.modelindex != sv_nailmodel
&& ent->v.modelindex != sv_supernailmodel)
return false;
if (numnails == MAX_NAILS)
return true;
nails[numnails] = ent;
numnails++;
return true;
}
void SV_EmitNailUpdate (sizebuf_t *msg)
{
byte bits[6]; // [48 bits] xyzpy 12 12 12 4 8
int n, i;
edict_t *ent;
int x, y, z, p, yaw;
if (!numnails)
return;
MSG_WriteByte (msg, svc_nails);
MSG_WriteByte (msg, numnails);
for (n=0 ; n<numnails ; n++)
{
ent = nails[n];
x = (int)(ent->v.origin[0]+4096)>>1;
y = (int)(ent->v.origin[1]+4096)>>1;
z = (int)(ent->v.origin[2]+4096)>>1;
p = (int)(16*ent->v.angles[0]/360)&15;
yaw = (int)(256*ent->v.angles[1]/360)&255;
bits[0] = x;
bits[1] = (x>>8) | (y<<4);
bits[2] = (y>>4);
bits[3] = z;
bits[4] = (z>>8) | (p<<4);
bits[5] = yaw;
for (i=0 ; i<6 ; i++)
MSG_WriteByte (msg, bits[i]);
}
}
//=============================================================================
/*
==================
SV_WriteDelta
Writes part of a packetentities message.
Can delta from either a baseline or a previous packet_entity
==================
*/
void SV_WriteDelta (entity_state_t *from, entity_state_t *to, sizebuf_t *msg, qboolean force)
{
int bits;
int i;
float miss;
// send an update
bits = 0;
for (i=0 ; i<3 ; i++)
{
miss = to->origin[i] - from->origin[i];
if ( miss < -0.1 || miss > 0.1 )
bits |= U_ORIGIN1<<i;
}
if ( to->angles[0] != from->angles[0] )
bits |= U_ANGLE1;
if ( to->angles[1] != from->angles[1] )
bits |= U_ANGLE2;
if ( to->angles[2] != from->angles[2] )
bits |= U_ANGLE3;
if ( to->colormap != from->colormap )
bits |= U_COLORMAP;
if ( to->skinnum != from->skinnum )
bits |= U_SKIN;
if ( to->frame != from->frame )
bits |= U_FRAME;
if ( to->effects != from->effects )
bits |= U_EFFECTS;
if ( to->modelindex != from->modelindex )
bits |= U_MODEL;
if (bits & 511)
bits |= U_MOREBITS;
if (to->flags & U_SOLID)
bits |= U_SOLID;
//
// write the message
//
if (!to->number)
SV_Error ("Unset entity number");
if (to->number >= 512)
SV_Error ("Entity number >= 512");
if (!bits && !force)
return; // nothing to send!
i = to->number | (bits&~511);
if (i & U_REMOVE)
Sys_Error ("U_REMOVE");
MSG_WriteShort (msg, i);
if (bits & U_MOREBITS)
MSG_WriteByte (msg, bits&255);
if (bits & U_MODEL)
MSG_WriteByte (msg, to->modelindex);
if (bits & U_FRAME)
MSG_WriteByte (msg, to->frame);
if (bits & U_COLORMAP)
MSG_WriteByte (msg, to->colormap);
if (bits & U_SKIN)
MSG_WriteByte (msg, to->skinnum);
if (bits & U_EFFECTS)
MSG_WriteByte (msg, to->effects);
if (bits & U_ORIGIN1)
MSG_WriteCoord (msg, to->origin[0]);
if (bits & U_ANGLE1)
MSG_WriteAngle(msg, to->angles[0]);
if (bits & U_ORIGIN2)
MSG_WriteCoord (msg, to->origin[1]);
if (bits & U_ANGLE2)
MSG_WriteAngle(msg, to->angles[1]);
if (bits & U_ORIGIN3)
MSG_WriteCoord (msg, to->origin[2]);
if (bits & U_ANGLE3)
MSG_WriteAngle(msg, to->angles[2]);
}
/*
=============
SV_EmitPacketEntities
Writes a delta update of a packet_entities_t to the message.
=============
*/
void SV_EmitPacketEntities (client_t *client, packet_entities_t *to, sizebuf_t *msg)
{
edict_t *ent;
client_frame_t *fromframe;
packet_entities_t *from;
int oldindex, newindex;
int oldnum, newnum;
int oldmax;
// this is the frame that we are going to delta update from
if (client->delta_sequence != -1)
{
fromframe = &client->frames[client->delta_sequence & UPDATE_MASK];
from = &fromframe->entities;
oldmax = from->num_entities;
MSG_WriteByte (msg, svc_deltapacketentities);
MSG_WriteByte (msg, client->delta_sequence);
}
else
{
oldmax = 0; // no delta update
from = NULL;
MSG_WriteByte (msg, svc_packetentities);
}
newindex = 0;
oldindex = 0;
//Con_Printf ("---%i to %i ----\n", client->delta_sequence & UPDATE_MASK
// , client->netchan.outgoing_sequence & UPDATE_MASK);
while (newindex < to->num_entities || oldindex < oldmax)
{
newnum = newindex >= to->num_entities ? 9999 : to->entities[newindex].number;
oldnum = oldindex >= oldmax ? 9999 : from->entities[oldindex].number;
if (newnum == oldnum)
{ // delta update from old position
//Con_Printf ("delta %i\n", newnum);
SV_WriteDelta (&from->entities[oldindex], &to->entities[newindex], msg, false);
oldindex++;
newindex++;
continue;
}
if (newnum < oldnum)
{ // this is a new entity, send it from the baseline
ent = EDICT_NUM(newnum);
//Con_Printf ("baseline %i\n", newnum);
SV_WriteDelta (&ent->baseline, &to->entities[newindex], msg, true);
newindex++;
continue;
}
if (newnum > oldnum)
{ // the old entity isn't present in the new message
//Con_Printf ("remove %i\n", oldnum);
MSG_WriteShort (msg, oldnum | U_REMOVE);
oldindex++;
continue;
}
}
MSG_WriteShort (msg, 0); // end of packetentities
}
/*
=============
SV_WritePlayersToClient
=============
*/
void SV_WritePlayersToClient (client_t *client, edict_t *clent, byte *pvs, sizebuf_t *msg)
{
int i, j;
client_t *cl;
edict_t *ent;
int msec;
usercmd_t cmd;
int pflags;
for (j=0,cl=svs.clients ; j<MAX_CLIENTS ; j++,cl++)
{
if (cl->state != cs_spawned)
continue;
ent = cl->edict;
// ZOID visibility tracking
if (ent != clent &&
!(client->spec_track && client->spec_track - 1 == j))
{
if (cl->spectator)
continue;
// ignore if not touching a PV leaf
for (i=0 ; i < ent->num_leafs ; i++)
if (pvs[ent->leafnums[i] >> 3] & (1 << (ent->leafnums[i]&7) ))
break;
if (i == ent->num_leafs)
continue; // not visible
}
pflags = PF_MSEC | PF_COMMAND;
if (ent->v.modelindex != sv_playermodel)
pflags |= PF_MODEL;
for (i=0 ; i<3 ; i++)
if (ent->v.velocity[i])
pflags |= PF_VELOCITY1<<i;
if (ent->v.effects)
pflags |= PF_EFFECTS;
if (ent->v.skin)
pflags |= PF_SKINNUM;
if (ent->v.health <= 0)
pflags |= PF_DEAD;
if (ent->v.mins[2] != -24)
pflags |= PF_GIB;
if (cl->spectator)
{ // only sent origin and velocity to spectators
pflags &= PF_VELOCITY1 | PF_VELOCITY2 | PF_VELOCITY3;
}
else if (ent == clent)
{ // don't send a lot of data on personal entity
pflags &= ~(PF_MSEC|PF_COMMAND);
if (ent->v.weaponframe)
pflags |= PF_WEAPONFRAME;
}
if (client->spec_track && client->spec_track - 1 == j &&
ent->v.weaponframe)
pflags |= PF_WEAPONFRAME;
MSG_WriteByte (msg, svc_playerinfo);
MSG_WriteByte (msg, j);
MSG_WriteShort (msg, pflags);
for (i=0 ; i<3 ; i++)
MSG_WriteCoord (msg, ent->v.origin[i]);
MSG_WriteByte (msg, ent->v.frame);
if (pflags & PF_MSEC)
{
msec = 1000*(sv.time - cl->localtime);
if (msec > 255)
msec = 255;
MSG_WriteByte (msg, msec);
}
if (pflags & PF_COMMAND)
{
cmd = cl->lastcmd;
if (ent->v.health <= 0)
{ // don't show the corpse looking around...
cmd.angles[0] = 0;
cmd.angles[1] = ent->v.angles[1];
cmd.angles[0] = 0;
}
cmd.buttons = 0; // never send buttons
cmd.impulse = 0; // never send impulses
MSG_WriteDeltaUsercmd (msg, &nullcmd, &cmd);
}
for (i=0 ; i<3 ; i++)
if (pflags & (PF_VELOCITY1<<i) )
MSG_WriteShort (msg, ent->v.velocity[i]);
if (pflags & PF_MODEL)
MSG_WriteByte (msg, ent->v.modelindex);
if (pflags & PF_SKINNUM)
MSG_WriteByte (msg, ent->v.skin);
if (pflags & PF_EFFECTS)
MSG_WriteByte (msg, ent->v.effects);
if (pflags & PF_WEAPONFRAME)
MSG_WriteByte (msg, ent->v.weaponframe);
}
}
/*
=============
SV_WriteEntitiesToClient
Encodes the current state of the world as
a svc_packetentities messages and possibly
a svc_nails message and
svc_playerinfo messages
=============
*/
void SV_WriteEntitiesToClient (client_t *client, sizebuf_t *msg)
{
int e, i;
byte *pvs;
vec3_t org;
edict_t *ent;
packet_entities_t *pack;
edict_t *clent;
client_frame_t *frame;
entity_state_t *state;
// this is the frame we are creating
frame = &client->frames[client->netchan.incoming_sequence & UPDATE_MASK];
// find the client's PVS
clent = client->edict;
VectorAdd (clent->v.origin, clent->v.view_ofs, org);
pvs = SV_FatPVS (org);
// send over the players in the PVS
SV_WritePlayersToClient (client, clent, pvs, msg);
// put other visible entities into either a packet_entities or a nails message
pack = &frame->entities;
pack->num_entities = 0;
numnails = 0;
for (e=MAX_CLIENTS+1, ent=EDICT_NUM(e) ; e<sv.num_edicts ; e++, ent = NEXT_EDICT(ent))
{
// ignore ents without visible models
if (!ent->v.modelindex || !*PR_GetString(ent->v.model))
continue;
// ignore if not touching a PV leaf
for (i=0 ; i < ent->num_leafs ; i++)
if (pvs[ent->leafnums[i] >> 3] & (1 << (ent->leafnums[i]&7) ))
break;
if (i == ent->num_leafs)
continue; // not visible
if (SV_AddNailUpdate (ent))
continue; // added to the special update list
// add to the packetentities
if (pack->num_entities == MAX_PACKET_ENTITIES)
continue; // all full
state = &pack->entities[pack->num_entities];
pack->num_entities++;
state->number = e;
state->flags = 0;
VectorCopy (ent->v.origin, state->origin);
VectorCopy (ent->v.angles, state->angles);
state->modelindex = ent->v.modelindex;
state->frame = ent->v.frame;
state->colormap = ent->v.colormap;
state->skinnum = ent->v.skin;
state->effects = ent->v.effects;
}
// encode the packet entities as a delta from the
// last packetentities acknowledged by the client
SV_EmitPacketEntities (client, pack, msg);
// now add the specialized nail update
SV_EmitNailUpdate (msg);
}