/*
========================
CG_InterpolatePlayerState
Generates cg.cur_lc->predictedPlayerState by interpolating between
cg.snap->player_state and cg.nextFrame->player_state
========================
*/
static void CG_InterpolatePlayerState( qboolean grabAngles ) {
float f;
int i;
playerState_t *out;
snapshot_t *prev, *next;
playerState_t *prevPS, *nextPS;
out = &cg.cur_lc->predictedPlayerState;
prev = cg.snap;
next = cg.nextSnap;
*out = *cg.cur_ps;
// if we are still allowing local input, short circuit the view angles
if ( grabAngles ) {
usercmd_t cmd;
int cmdNum;
cmdNum = trap_GetCurrentCmdNumber();
trap_GetUserCmd( cmdNum, &cmd, cg.cur_localPlayerNum );
PM_UpdateViewAngles( out, &cmd );
}
// if the next frame is a teleport, we can't lerp to it
if ( cg.nextFrameTeleport ) {
return;
}
if ( !next || next->serverTime <= prev->serverTime ) {
return;
}
if (prev->playerNums[cg.cur_localPlayerNum] == -1 ||
next->playerNums[cg.cur_localPlayerNum] == -1) {
return;
}
prevPS = &prev->pss[cg.cur_localPlayerNum];
nextPS = &next->pss[cg.cur_localPlayerNum];
f = (float)( cg.time - prev->serverTime ) / ( next->serverTime - prev->serverTime );
i = nextPS->bobCycle;
if ( i < prevPS->bobCycle ) {
i += 256; // handle wraparound
}
out->bobCycle = prevPS->bobCycle + f * ( i - prevPS->bobCycle );
for ( i = 0 ; i < 3 ; i++ ) {
out->origin[i] = prevPS->origin[i] + f * (nextPS->origin[i] - prevPS->origin[i] );
if ( !grabAngles ) {
out->viewangles[i] = LerpAngle(
prevPS->viewangles[i], nextPS->viewangles[i], f );
}
out->velocity[i] = prevPS->velocity[i] +
f * (nextPS->velocity[i] - prevPS->velocity[i] );
}
}
void PmoveSingle (pmove_t *pmove) {
pm = pmove;
// this counter lets us debug movement problems with a journal
// by setting a conditional breakpoint fot the previous frame
c_pmove++;
// clear results
pm->numtouch = 0;
pm->watertype = 0;
pm->waterlevel = 0;
if ( pm->ps->stats[STAT_HEALTH] <= 0 ) {
pm->tracemask &= ~CONTENTS_BODY; // corpses can fly through bodies
}
// make sure walking button is clear if they are running, to avoid
// proxy no-footsteps cheats
if ( abs( pm->cmd.forwardmove ) > 64 || abs( pm->cmd.rightmove ) > 64 ) {
pm->cmd.buttons &= ~BUTTON_WALKING;
}
// set the talk balloon flag
if ( pm->cmd.buttons & BUTTON_TALK ) {
pm->ps->eFlags |= EF_TALK;
} else {
pm->ps->eFlags &= ~EF_TALK;
}
// set the firing flag for continuous beam weapons
if ( !(pm->ps->pm_flags & PMF_RESPAWNED) && pm->ps->pm_type != PM_INTERMISSION && pm->ps->pm_type != PM_NOCLIP
&& ( pm->cmd.buttons & BUTTON_ATTACK ) && pm->ps->ammo[ pm->ps->weapon ] ) {
pm->ps->eFlags |= EF_FIRING;
} else {
pm->ps->eFlags &= ~EF_FIRING;
}
// clear the respawned flag if attack and use are cleared
if ( pm->ps->stats[STAT_HEALTH] > 0 &&
!( pm->cmd.buttons & (BUTTON_ATTACK | BUTTON_USE_HOLDABLE) ) ) {
pm->ps->pm_flags &= ~PMF_RESPAWNED;
}
// if talk button is down, dissallow all other input
// this is to prevent any possible intercept proxy from
// adding fake talk balloons
if ( pmove->cmd.buttons & BUTTON_TALK ) {
// keep the talk button set tho for when the cmd.serverTime > 66 msec
// and the same cmd is used multiple times in Pmove
pmove->cmd.buttons = BUTTON_TALK;
pmove->cmd.forwardmove = 0;
pmove->cmd.rightmove = 0;
pmove->cmd.upmove = 0;
}
// clear all pmove local vars
memset (&pml, 0, sizeof(pml));
// determine the time
pml.msec = pmove->cmd.serverTime - pm->ps->commandTime;
if ( pml.msec < 1 ) {
pml.msec = 1;
} else if ( pml.msec > 200 ) {
pml.msec = 200;
}
pm->ps->commandTime = pmove->cmd.serverTime;
// save old org in case we get stuck
VectorCopy (pm->ps->origin, pml.previous_origin);
// save old velocity for crashlanding
VectorCopy (pm->ps->velocity, pml.previous_velocity);
pml.frametime = pml.msec * 0.001;
// update the viewangles
PM_UpdateViewAngles( pm->ps, &pm->cmd );
AngleVectors (pm->ps->viewangles, pml.forward, pml.right, pml.up);
if ( pm->cmd.upmove < 10 ) {
// not holding jump
pm->ps->pm_flags &= ~PMF_JUMP_HELD;
}
// decide if backpedaling animations should be used
if ( pm->cmd.forwardmove < 0 ) {
pm->ps->pm_flags |= PMF_BACKWARDS_RUN;
} else if ( pm->cmd.forwardmove > 0 || ( pm->cmd.forwardmove == 0 && pm->cmd.rightmove ) ) {
pm->ps->pm_flags &= ~PMF_BACKWARDS_RUN;
}
if ( pm->ps->pm_type >= PM_DEAD ) {
pm->cmd.forwardmove = 0;
pm->cmd.rightmove = 0;
pm->cmd.upmove = 0;
}
if ( pm->ps->pm_type == PM_SPECTATOR ) {
PM_CheckDuck ();
PM_FlyMove ();
PM_DropTimers ();
return;
}
if ( pm->ps->pm_type == PM_NOCLIP ) {
PM_NoclipMove ();
PM_DropTimers ();
return;
}
if (pm->ps->pm_type == PM_FREEZE) {
return; // no movement at all
}
if ( pm->ps->pm_type == PM_INTERMISSION || pm->ps->pm_type == PM_SPINTERMISSION) {
return; // no movement at all
}
// set watertype, and waterlevel
PM_SetWaterLevel();
pml.previous_waterlevel = pmove->waterlevel;
// set mins, maxs, and viewheight
PM_CheckDuck ();
// set groundentity
PM_GroundTrace();
if ( pm->ps->pm_type == PM_DEAD ) {
PM_DeadMove ();
}
PM_DropTimers();
#ifdef MISSIONPACK
if ( pm->ps->powerups[PW_INVULNERABILITY] ) {
PM_InvulnerabilityMove();
} else
#endif
if ( pm->ps->powerups[PW_FLIGHT] ) {
// flight powerup doesn't allow jump and has different friction
PM_FlyMove();
} else if (pm->ps->pm_flags & PMF_GRAPPLE_PULL) {
PM_GrappleMove();
// We can wiggle a bit
PM_AirMove();
} else if (pm->ps->pm_flags & PMF_TIME_WATERJUMP) {
PM_WaterJumpMove();
} else if ( pm->waterlevel > 1 ) {
// swimming
PM_WaterMove();
} else if ( pml.walking ) {
// walking on ground
PM_WalkMove();
} else {
// airborne
PM_AirMove();
}
PM_Animate();
// set groundentity, watertype, and waterlevel
PM_GroundTrace();
PM_SetWaterLevel();
// weapons
PM_Weapon();
// torso animation
PM_TorsoAnimation();
// footstep events / legs animations
PM_Footsteps();
// entering / leaving water splashes
PM_WaterEvents();
// snap some parts of playerstate to save network bandwidth
trap_SnapVector( pm->ps->velocity );
}
/*
=================
CG_PredictPlayerState
Generates cg.cur_lc->predictedPlayerState for the current cg.time
cg.cur_lc->predictedPlayerState is guaranteed to be valid after exiting.
For demo playback, this will be an interpolation between two valid
playerState_t.
For normal gameplay, it will be the result of predicted usercmd_t on
top of the most recent playerState_t received from the server.
Each new snapshot will usually have one or more new usercmd over the last,
but we simulate all unacknowledged commands each time, not just the new ones.
This means that on an internet connection, quite a few pmoves may be issued
each frame.
OPTIMIZE: don't re-simulate unless the newly arrived snapshot playerState_t
differs from the predicted one. Would require saving all intermediate
playerState_t during prediction.
We detect prediction errors and allow them to be decayed off over several frames
to ease the jerk.
=================
*/
void CG_PredictPlayerState( void ) {
int cmdNum, current;
playerState_t oldPlayerState;
qboolean moved;
usercmd_t oldestCmd;
usercmd_t latestCmd;
cg.cur_lc->hyperspace = qfalse; // will be set if touching a trigger_teleport
// if this is the first frame we must guarantee
// predictedPlayerState is valid even if there is some
// other error condition
if ( !cg.cur_lc->validPPS ) {
cg.cur_lc->validPPS = qtrue;
cg.cur_lc->predictedPlayerState = *cg.cur_ps;
}
// demo playback just copies the moves
if ( cg.demoPlayback || (cg.cur_ps->pm_flags & PMF_FOLLOW) ) {
CG_InterpolatePlayerState( qfalse );
return;
}
// non-predicting local movement will grab the latest angles
if ( cg_nopredict.integer || cg_synchronousClients.integer ) {
CG_InterpolatePlayerState( qtrue );
return;
}
// prepare for pmove
cg_pmove.ps = &cg.cur_lc->predictedPlayerState;
if (cg.cur_lc->predictedPlayerState.collisionType == CT_CAPSULE) {
cg_pmove.trace = CG_TraceCapsule;
} else {
cg_pmove.trace = CG_Trace;
}
cg_pmove.pointcontents = CG_PointContents;
if ( cg_pmove.ps->pm_type == PM_DEAD ) {
cg_pmove.tracemask = MASK_PLAYERSOLID & ~CONTENTS_BODY;
}
else {
cg_pmove.tracemask = MASK_PLAYERSOLID;
}
if ( cg.cur_ps->persistant[PERS_TEAM] == TEAM_SPECTATOR ) {
cg_pmove.tracemask &= ~CONTENTS_BODY; // spectators can fly through bodies
}
cg_pmove.noFootsteps = ( cgs.dmflags & DF_NO_FOOTSTEPS ) > 0;
// save the state before the pmove so we can detect transitions
oldPlayerState = cg.cur_lc->predictedPlayerState;
current = trap_GetCurrentCmdNumber();
// if we don't have the commands right after the snapshot, we
// can't accurately predict a current position, so just freeze at
// the last good position we had
cmdNum = current - CMD_BACKUP + 1;
trap_GetUserCmd( cmdNum, &oldestCmd, cg.cur_localPlayerNum );
if ( oldestCmd.serverTime > cg.cur_ps->commandTime
&& oldestCmd.serverTime < cg.time ) { // special check for map_restart
if ( cg_showmiss.integer ) {
CG_Printf ("exceeded PACKET_BACKUP on commands\n");
}
return;
}
// get the latest command so we can know which commands are from previous map_restarts
trap_GetUserCmd( current, &latestCmd, cg.cur_localPlayerNum );
// get the most recent information we have, even if
// the server time is beyond our current cg.time,
// because predicted player positions are going to
// be ahead of everything else anyway
if ( cg.nextSnap && !cg.nextFrameTeleport && !cg.thisFrameTeleport
&& cg.nextSnap->playerNums[cg.cur_localPlayerNum] != -1) {
cg.cur_lc->predictedPlayerState = cg.nextSnap->pss[cg.cur_localPlayerNum];
cg.physicsTime = cg.nextSnap->serverTime;
} else {
cg.cur_lc->predictedPlayerState = *cg.cur_ps;
cg.physicsTime = cg.snap->serverTime;
}
if ( pmove_msec.integer < 8 ) {
trap_Cvar_SetValue( "pmove_msec", 8 );
}
else if ( pmove_msec.integer > 33 ) {
trap_Cvar_SetValue( "pmove_msec", 33 );
}
cg_pmove.pmove_fixed = pmove_fixed.integer;// | cg_pmove_fixed.integer;
cg_pmove.pmove_msec = pmove_msec.integer;
cg_pmove.pmove_overbounce = pmove_overbounce.integer;
// run cmds
moved = qfalse;
for ( cmdNum = current - CMD_BACKUP + 1 ; cmdNum <= current ; cmdNum++ ) {
// get the command
trap_GetUserCmd( cmdNum, &cg_pmove.cmd, cg.cur_localPlayerNum );
if ( cg_pmove.pmove_fixed ) {
PM_UpdateViewAngles( cg_pmove.ps, &cg_pmove.cmd );
}
// don't do anything if the time is before the snapshot player time
if ( cg_pmove.cmd.serverTime <= cg.cur_lc->predictedPlayerState.commandTime ) {
continue;
}
// don't do anything if the command was from a previous map_restart
if ( cg_pmove.cmd.serverTime > latestCmd.serverTime ) {
continue;
}
// check for a prediction error from last frame
// on a lan, this will often be the exact value
// from the snapshot, but on a wan we will have
// to predict several commands to get to the point
// we want to compare
if ( cg.cur_lc->predictedPlayerState.commandTime == oldPlayerState.commandTime ) {
vec3_t delta;
float len;
if ( cg.thisFrameTeleport ) {
// a teleport will not cause an error decay
VectorClear( cg.cur_lc->predictedError );
if ( cg_showmiss.integer ) {
CG_Printf( "PredictionTeleport\n" );
}
cg.thisFrameTeleport = qfalse;
} else {
vec3_t adjusted, new_angles;
CG_AdjustPositionForMover( cg.cur_lc->predictedPlayerState.origin,
cg.cur_lc->predictedPlayerState.groundEntityNum, cg.physicsTime, cg.oldTime, adjusted, cg.cur_lc->predictedPlayerState.viewangles, new_angles);
if ( cg_showmiss.integer ) {
if (!VectorCompare( oldPlayerState.origin, adjusted )) {
CG_Printf("prediction error\n");
}
}
VectorSubtract( oldPlayerState.origin, adjusted, delta );
len = VectorLength( delta );
if ( len > 0.1 ) {
if ( cg_showmiss.integer ) {
CG_Printf("Prediction miss: %f\n", len);
}
if ( cg_errorDecay.integer ) {
int t;
float f;
t = cg.time - cg.cur_lc->predictedErrorTime;
f = ( cg_errorDecay.value - t ) / cg_errorDecay.value;
if ( f < 0 ) {
f = 0;
}
if ( f > 0 && cg_showmiss.integer ) {
CG_Printf("Double prediction decay: %f\n", f);
}
VectorScale( cg.cur_lc->predictedError, f, cg.cur_lc->predictedError );
} else {
VectorClear( cg.cur_lc->predictedError );
}
VectorAdd( delta, cg.cur_lc->predictedError, cg.cur_lc->predictedError );
cg.cur_lc->predictedErrorTime = cg.oldTime;
}
}
}
// don't predict gauntlet firing, which is only supposed to happen
// when it actually inflicts damage
cg_pmove.gauntletHit = qfalse;
if ( cg_pmove.pmove_fixed ) {
cg_pmove.cmd.serverTime = ((cg_pmove.cmd.serverTime + pmove_msec.integer-1) / pmove_msec.integer) * pmove_msec.integer;
}
Pmove (&cg_pmove);
moved = qtrue;
// add push trigger movement effects
CG_TouchTriggerPrediction();
// check for predictable events that changed from previous predictions
//CG_CheckChangedPredictableEvents(&cg.cur_lc->predictedPlayerState);
}
if ( cg_showmiss.integer > 1 ) {
CG_Printf( "[%i : %i] ", cg_pmove.cmd.serverTime, cg.time );
}
if ( !moved ) {
if ( cg_showmiss.integer ) {
CG_Printf( "not moved\n" );
}
return;
}
// adjust for the movement of the groundentity
CG_AdjustPositionForMover( cg.cur_lc->predictedPlayerState.origin,
cg.cur_lc->predictedPlayerState.groundEntityNum,
cg.physicsTime, cg.time, cg.cur_lc->predictedPlayerState.origin, cg.cur_lc->predictedPlayerState.viewangles,cg.cur_lc->predictedPlayerState.viewangles);
if ( cg_showmiss.integer ) {
if (cg.cur_lc->predictedPlayerState.eventSequence > oldPlayerState.eventSequence + MAX_PS_EVENTS) {
CG_Printf("WARNING: dropped event\n");
}
}
// fire events and other transition triggered things
CG_TransitionPlayerState( &cg.cur_lc->predictedPlayerState, &oldPlayerState );
if ( cg_showmiss.integer ) {
if (cg.cur_lc->eventSequence > cg.cur_lc->predictedPlayerState.eventSequence) {
CG_Printf("WARNING: double event\n");
cg.cur_lc->eventSequence = cg.cur_lc->predictedPlayerState.eventSequence;
}
}
}
