quakeforge/qw/source/cl_pred.c

217 lines
5.4 KiB
C
Raw Normal View History

/*
cl_pred.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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((unused)) const char rcsid[] =
"$Id$";
#include <math.h>
2001-05-15 05:27:14 +00:00
#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/keys.h"
#include "bothdefs.h"
#include "compat.h"
#include "cl_ents.h"
#include "cl_pred.h"
#include "client.h"
#include "pmove.h"
cvar_t *cl_predict;
cvar_t *cl_pushlatency;
void
CL_PredictUsercmd (player_state_t * from, player_state_t * to, usercmd_t *u,
qboolean clientplayer)
{
if (!clientplayer) {
if (VectorIsZero (from->velocity)) {
VectorCopy (from->origin, to->origin);
VectorCopy (u->angles, to->viewangles);
VectorCopy (from->velocity, to->velocity);
return;
}
2001-05-14 03:08:24 +00:00
}
// split up very long moves
if (u->msec > 50) {
player_state_t temp;
usercmd_t split;
split = *u;
split.msec /= 2;
CL_PredictUsercmd (from, &temp, &split, clientplayer);
CL_PredictUsercmd (&temp, to, &split, clientplayer);
return;
}
VectorCopy (from->origin, pmove.origin);
VectorCopy (u->angles, pmove.angles);
VectorCopy (from->velocity, pmove.velocity);
pmove.oldbuttons = from->oldbuttons;
2002-09-13 04:30:18 +00:00
pmove.oldonground = from->oldonground;
pmove.waterjumptime = from->waterjumptime;
pmove.dead = cl.stats[STAT_HEALTH] <= 0;
if (clientplayer)
pmove.spectator = cl.spectator;
else
pmove.spectator = false;
pmove.flying = cl.stats[STAT_FLYMODE];
pmove.cmd = *u;
PlayerMove ();
to->waterjumptime = pmove.waterjumptime;
to->oldbuttons = pmove.oldbuttons; // Tonik
2002-09-13 04:30:18 +00:00
to->oldonground = pmove.oldonground;
VectorCopy (pmove.origin, to->origin);
VectorCopy (pmove.angles, to->viewangles);
VectorCopy (pmove.velocity, to->velocity);
to->onground = onground;
to->weaponframe = from->weaponframe;
}
static inline void
check_onserver (void)
{
// we can now render a frame
if (cls.state == ca_onserver) {
// first update is the final signon stage
CL_SetState (ca_active);
}
}
void
CL_PredictMove (void)
{
float f;
2001-08-28 23:05:45 +00:00
int oldphysent, i;
2001-09-10 17:32:22 +00:00
frame_t *from, *to = NULL;
if (cl_pushlatency->value > 0)
Cvar_Set (cl_pushlatency, "0");
if (cl.paused)
return;
// assume on ground unless prediction says different
cl.onground = 0;
cl.time = realtime - cls.latency - cl_pushlatency->value * 0.001;
if (cl.time > realtime)
cl.time = realtime;
if (cl.intermission) {
check_onserver ();
return;
}
if (!cl.validsequence)
return;
if (cls.netchan.outgoing_sequence - cls.netchan.incoming_sequence >=
UPDATE_BACKUP - 1)
return;
VectorCopy (cl.viewangles, cl.simangles);
// this is the last frame received from the server
from = &cl.frames[cls.netchan.incoming_sequence & UPDATE_MASK];
check_onserver ();
if (!cl_predict->int_val) {
VectorCopy (from->playerstate[cl.playernum].velocity, cl.simvel);
VectorCopy (from->playerstate[cl.playernum].origin, cl.simorg);
return;
}
2001-05-14 03:08:24 +00:00
// predict forward until cl.time <= to->senttime
oldphysent = pmove.numphysent;
CL_SetSolidPlayers (cl.playernum);
2001-05-14 03:08:24 +00:00
// to = &cl.frames[cls.netchan.incoming_sequence & UPDATE_MASK];
for (i = 1; i < UPDATE_BACKUP - 1 && cls.netchan.incoming_sequence + i <
cls.netchan.outgoing_sequence; i++) {
to = &cl.frames[(cls.netchan.incoming_sequence + i) & UPDATE_MASK];
CL_PredictUsercmd (&from->playerstate[cl.playernum],
&to->playerstate[cl.playernum], &to->cmd,
true);
cl.onground = onground;
if (to->senttime >= cl.time)
break;
from = to;
}
pmove.numphysent = oldphysent;
if (i == UPDATE_BACKUP - 1 || !to)
return; // net hasn't deliver packets in a
// long time...
// now interpolate some fraction of the final frame
if (to->senttime == from->senttime)
f = 0;
else
2002-06-26 06:33:00 +00:00
f = bound(0, (cl.time - from->senttime) /
(to->senttime - from->senttime), 1);
for (i = 0; i < 3; i++)
if (fabs (from->playerstate[cl.playernum].origin[i] -
to->playerstate[cl.playernum].origin[i]) > 128) {
2001-05-14 03:08:24 +00:00
// teleported, so don't lerp
VectorCopy (to->playerstate[cl.playernum].velocity, cl.simvel);
VectorCopy (to->playerstate[cl.playernum].origin, cl.simorg);
return;
}
for (i = 0; i < 3; i++) {
2002-06-26 06:33:00 +00:00
cl.simorg[i] = from->playerstate[cl.playernum].origin[i] +
f * (to->playerstate[cl.playernum].origin[i] -
from->playerstate[cl.playernum].origin[i]);
2002-06-26 06:33:00 +00:00
cl.simvel[i] = from->playerstate[cl.playernum].velocity[i] +
f * (to->playerstate[cl.playernum].velocity[i] -
from->playerstate[cl.playernum].velocity[i]);
}
}
void
CL_Prediction_Init_Cvars (void)
{
cl_predict = Cvar_Get ("cl_predict", "1", CVAR_NONE, NULL,
"Set to enable client prediction");
2001-09-10 17:32:22 +00:00
cl_pushlatency = Cvar_Get ("pushlatency", "-999", CVAR_NONE, NULL,
"How much prediction should the client make");
}