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quakeforge/qw/source/sv_ents.c

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/*
sv_ents.c
(description)
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include "QF/msg.h"
#include "QF/sys.h"
#include "compat.h"
#include "msg_ucmd.h"
#include "server.h"
#include "sv_progs.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.
*/
byte fatpvs[MAX_MAP_LEAFS / 8];
int fatbytes;
void
SV_AddToFatPVS (vec3_t org, mnode_t *node)
{
byte *pvs;
int i;
float d;
mplane_t *plane;
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;
}
// nails are plentiful, so there is a special network protocol for them
#define MAX_NAILS 32
edict_t *nails[MAX_NAILS];
int numnails;
qboolean
SV_AddNailUpdate (edict_t *ent)
{
if (SVfloat (ent, modelindex) != sv_nailmodel
&& SVfloat (ent, 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 i, n, p, x, y, z, yaw;
edict_t *ent;
if (!numnails)
return;
MSG_WriteByte (msg, svc_nails);
MSG_WriteByte (msg, numnails);
for (n = 0; n < numnails; n++) {
ent = nails[n];
x = (int) (SVvector (ent, origin)[0] + 4096) >> 1;
y = (int) (SVvector (ent, origin)[1] + 4096) >> 1;
z = (int) (SVvector (ent, origin)[2] + 4096) >> 1;
p = (int) (16 * SVvector (ent, angles)[0] / 360) & 15;
yaw = (int) (256 * SVvector (ent, 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 stdver)
{
int bits, 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;
// LordHavoc: cleaned up Endy's coding style, and added missing effects
// Ender (QSG - Begin)
if (stdver > 1) {
if (to->alpha != from->alpha)
bits |= U_ALPHA;
if (to->scale != from->scale)
bits |= U_SCALE;
if (to->glow_size != from->glow_size)
bits |= U_GLOWSIZE;
if (to->glow_color != from->glow_color)
bits |= U_GLOWCOLOR;
if (to->colormod != from->colormod)
bits |= U_COLORMOD;
}
if (bits >= 16777216)
bits |= U_EXTEND2;
if (bits >= 65536)
bits |= U_EXTEND1;
// Ender (QSG - End)
if (bits & 511)
bits |= U_MOREBITS;
if (to->flags & U_SOLID)
bits |= U_SOLID;
// write the message
if (!to->number)
Sys_Error ("Unset entity number");
if (to->number >= 512)
Sys_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);
// LordHavoc: cleaned up Endy's tabs
// Ender (QSG - Begin)
if (bits & U_EXTEND1)
MSG_WriteByte (msg, bits >> 16);
if (bits & U_EXTEND2)
MSG_WriteByte (msg, bits >> 24);
// Ender (QSG - End)
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]);
// LordHavoc: cleaned up Endy's tabs, rearranged bytes, and implemented
// missing effects
// Ender (QSG - Begin)
if (bits & U_ALPHA)
MSG_WriteByte (msg, to->alpha);
if (bits & U_SCALE)
MSG_WriteByte (msg, to->scale);
if (bits & U_EFFECTS2)
MSG_WriteByte (msg, (to->effects >> 8));
if (bits & U_GLOWSIZE)
MSG_WriteByte (msg, to->glow_size);
if (bits & U_GLOWCOLOR)
MSG_WriteByte (msg, to->glow_color);
if (bits & U_COLORMOD)
MSG_WriteByte (msg, to->colormod);
if (bits & U_FRAME2)
MSG_WriteByte (msg, (to->frame >> 8));
// Ender (QSG - End)
}
/*
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)
{
int newindex, oldindex, newnum, oldnum, oldmax;
edict_t *ent;
client_frame_t *fromframe;
packet_entities_t *from;
// 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;
// SV_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
// SV_Printf ("delta %i\n", newnum);
SV_WriteDelta (&from->entities[oldindex], &to->entities[newindex],
msg, false, client->stdver);
oldindex++;
newindex++;
continue;
}
if (newnum < oldnum) { // this is a new entity, send it from
// the baseline
ent = EDICT_NUM (&sv_pr_state, newnum);
// SV_Printf ("baseline %i\n", newnum);
SV_WriteDelta (ent->data, &to->entities[newindex], msg, true,
client->stdver);
newindex++;
continue;
}
if (newnum > oldnum) { // the old entity isn't present in
// the new message
// SV_Printf ("remove %i\n", oldnum);
MSG_WriteShort (msg, oldnum | U_REMOVE);
oldindex++;
continue;
}
}
MSG_WriteShort (msg, 0); // end of packetentities
}
void
SV_WritePlayersToClient (client_t *client, edict_t *clent, byte * pvs,
sizebuf_t *msg)
{
int i, j, msec, pflags;
client_t *cl;
edict_t *ent;
usercmd_t cmd;
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 (SVfloat (ent, modelindex) != sv_playermodel)
pflags |= PF_MODEL;
for (i = 0; i < 3; i++)
if (SVvector (ent, velocity)[i])
pflags |= PF_VELOCITY1 << i;
if (SVfloat (ent, effects))
pflags |= PF_EFFECTS;
if (SVfloat (ent, skin))
pflags |= PF_SKINNUM;
if (SVfloat (ent, health) <= 0)
pflags |= PF_DEAD;
if (SVvector (ent, 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 (SVfloat (ent, weaponframe))
pflags |= PF_WEAPONFRAME;
}
if (client->spec_track && client->spec_track - 1 == j &&
SVfloat (ent, weaponframe)) pflags |= PF_WEAPONFRAME;
MSG_WriteByte (msg, svc_playerinfo);
MSG_WriteByte (msg, j);
MSG_WriteShort (msg, pflags);
MSG_WriteCoordV (msg, SVvector (ent, origin));
MSG_WriteByte (msg, SVfloat (ent, 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 (SVfloat (ent, health) <= 0) { // don't show the corpse
// looking around...
cmd.angles[0] = 0;
cmd.angles[1] = SVvector (ent, 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, SVvector (ent, velocity)[i]);
if (pflags & PF_MODEL)
MSG_WriteByte (msg, SVfloat (ent, modelindex));
if (pflags & PF_SKINNUM)
MSG_WriteByte (msg, SVfloat (ent, skin));
if (pflags & PF_EFFECTS)
MSG_WriteByte (msg, SVfloat (ent, effects));
if (pflags & PF_WEAPONFRAME)
MSG_WriteByte (msg, SVfloat (ent, 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)
{
byte *pvs;
int e, i, num_edicts;
vec3_t org;
client_frame_t *frame;
edict_t *clent, *ent;
entity_state_t *state;
packet_entities_t *pack;
// 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 (SVvector (clent, origin), SVvector (clent, 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;
num_edicts = min (sv.num_edicts, 512); //FIXME stupid protocol limit
for (e = MAX_CLIENTS + 1, ent = EDICT_NUM (&sv_pr_state, e);
e < num_edicts;
e++, ent = NEXT_EDICT (&sv_pr_state, ent)) {
if (ent->free)
continue;
// ignore ents without visible models
if (!SVfloat (ent, modelindex)
|| !*PR_GetString (&sv_pr_state, SVstring (ent, 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 (SVvector (ent, origin), state->origin);
VectorCopy (SVvector (ent, angles), state->angles);
state->modelindex = SVfloat (ent, modelindex);
state->frame = SVfloat (ent, frame);
state->colormap = SVfloat (ent, colormap);
state->skinnum = SVfloat (ent, skin);
state->effects = SVfloat (ent, effects);
// LordHavoc: cleaned up Endy's coding style, shortened the code,
// and implemented missing effects
// Ender: EXTEND (QSG - Begin)
{
state->alpha = 255;
state->scale = 16;
state->glow_size = 0;
state->glow_color = 254;
state->colormod = 255;
if (sv_fields.alpha != -1 && SVfloat (ent, alpha))
state->alpha = bound (0, SVfloat (ent, alpha), 1) * 255.0;
if (sv_fields.scale != -1 && SVfloat (ent, scale))
state->scale = bound (0, SVfloat (ent, scale), 15.9375) * 16.0;
if (sv_fields.glow_size != -1 && SVfloat (ent, glow_size))
state->glow_size = bound (-1024, (int) SVfloat
(ent, glow_size), 1016) >> 3;
if (sv_fields.glow_color != -1 && SVfloat (ent, glow_color))
state->glow_color = (int) SVfloat (ent, glow_color);
if (sv_fields.colormod != -1
&& SVvector (ent, colormod)[0]
&& SVvector (ent, colormod)[1]
&& SVvector (ent, colormod)[2])
state->colormod =
((int) (bound (0, SVvector (ent, colormod)[0], 1) * 7.0)
<< 5) |
((int) (bound (0, SVvector (ent, colormod)[1], 1) * 7.0)
<< 2) |
(int) (bound (0, SVvector (ent, colormod)[2], 1) * 3.0);
}
// Ender: EXTEND (QSG - End)
}
// 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);
}
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