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Diffstat (limited to 'src/cgame/cg_snapshot.c')
| -rw-r--r-- | src/cgame/cg_snapshot.c | 402 |
1 files changed, 0 insertions, 402 deletions
diff --git a/src/cgame/cg_snapshot.c b/src/cgame/cg_snapshot.c deleted file mode 100644 index be64bc89..00000000 --- a/src/cgame/cg_snapshot.c +++ /dev/null @@ -1,402 +0,0 @@ -// Copyright (C) 1999-2000 Id Software, Inc. -// -// cg_snapshot.c -- things that happen on snapshot transition, -// not necessarily every single rendered frame - -/* - * Portions Copyright (C) 2000-2001 Tim Angus - * - * 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, 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 the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* To assertain which portions are licensed under the GPL and which are - * licensed by Id Software, Inc. please run a diff between the equivalent - * versions of the "Tremulous" modification and the unmodified "Quake3" - * game source code. - */ - -#include "cg_local.h" - - - -/* -================== -CG_ResetEntity -================== -*/ -static void CG_ResetEntity( centity_t *cent ) { - // if an event is set, assume it is new enough to use - // if the event had timed out, it would have been cleared - cent->previousEvent = 0; - - cent->trailTime = cg.snap->serverTime; - - VectorCopy (cent->currentState.origin, cent->lerpOrigin); - VectorCopy (cent->currentState.angles, cent->lerpAngles); - if ( cent->currentState.eType == ET_PLAYER ) { - CG_ResetPlayerEntity( cent ); - } -} - -/* -=============== -CG_TransitionEntity - -cent->nextState is moved to cent->currentState and events are fired -=============== -*/ -static void CG_TransitionEntity( centity_t *cent ) { - cent->currentState = cent->nextState; - cent->currentValid = qtrue; - - // reset if the entity wasn't in the last frame or was teleported - if ( !cent->interpolate ) { - CG_ResetEntity( cent ); - } - - // clear the next state. if will be set by the next CG_SetNextSnap - cent->interpolate = qfalse; - - // check for events - CG_CheckEvents( cent ); -} - - -/* -================== -CG_SetInitialSnapshot - -This will only happen on the very first snapshot, or -on tourney restarts. All other times will use -CG_TransitionSnapshot instead. - -FIXME: Also called by map_restart? -================== -*/ -void CG_SetInitialSnapshot( snapshot_t *snap ) { - int i; - centity_t *cent; - entityState_t *state; - - cg.snap = snap; - - BG_PlayerStateToEntityState( &snap->ps, &cg_entities[ snap->ps.clientNum ].currentState, qfalse ); - - // sort out solid entities - CG_BuildSolidList(); - - CG_ExecuteNewServerCommands( snap->serverCommandSequence ); - - // set our local weapon selection pointer to - // what the server has indicated the current weapon is - CG_Respawn(); - - for ( i = 0 ; i < cg.snap->numEntities ; i++ ) { - state = &cg.snap->entities[ i ]; - cent = &cg_entities[ state->number ]; - - memcpy(¢->currentState, state, sizeof(entityState_t)); - //cent->currentState = *state; - cent->interpolate = qfalse; - cent->currentValid = qtrue; - - CG_ResetEntity( cent ); - - // check for events - CG_CheckEvents( cent ); - } -} - - -/* -=================== -CG_TransitionSnapshot - -The transition point from snap to nextSnap has passed -=================== -*/ -static void CG_TransitionSnapshot( void ) { - centity_t *cent; - snapshot_t *oldFrame; - int i; - - if ( !cg.snap ) { - CG_Error( "CG_TransitionSnapshot: NULL cg.snap" ); - } - if ( !cg.nextSnap ) { - CG_Error( "CG_TransitionSnapshot: NULL cg.nextSnap" ); - } - - // execute any server string commands before transitioning entities - CG_ExecuteNewServerCommands( cg.nextSnap->serverCommandSequence ); - - // if we had a map_restart, set everthing with initial - if ( !cg.snap ) { - } - - // clear the currentValid flag for all entities in the existing snapshot - for ( i = 0 ; i < cg.snap->numEntities ; i++ ) { - cent = &cg_entities[ cg.snap->entities[ i ].number ]; - cent->currentValid = qfalse; - } - - // move nextSnap to snap and do the transitions - oldFrame = cg.snap; - cg.snap = cg.nextSnap; - - BG_PlayerStateToEntityState( &cg.snap->ps, &cg_entities[ cg.snap->ps.clientNum ].currentState, qfalse ); - cg_entities[ cg.snap->ps.clientNum ].interpolate = qfalse; - - for ( i = 0 ; i < cg.snap->numEntities ; i++ ) { - cent = &cg_entities[ cg.snap->entities[ i ].number ]; - CG_TransitionEntity( cent ); - } - - cg.nextSnap = NULL; - - // check for playerstate transition events - if ( oldFrame ) { - playerState_t *ops, *ps; - - ops = &oldFrame->ps; - ps = &cg.snap->ps; - // teleporting checks are irrespective of prediction - if ( ( ps->eFlags ^ ops->eFlags ) & EF_TELEPORT_BIT ) { - cg.thisFrameTeleport = qtrue; // will be cleared by prediction code - } - - // if we are not doing client side movement prediction for any - // reason, then the client events and view changes will be issued now - if ( cg.demoPlayback || (cg.snap->ps.pm_flags & PMF_FOLLOW) - || cg_nopredict.integer || cg_synchronousClients.integer ) { - CG_TransitionPlayerState( ps, ops ); - } - - } - -} - - -/* -=================== -CG_SetNextSnap - -A new snapshot has just been read in from the client system. -=================== -*/ -static void CG_SetNextSnap( snapshot_t *snap ) { - int num; - entityState_t *es; - centity_t *cent; - - cg.nextSnap = snap; - - BG_PlayerStateToEntityState( &snap->ps, &cg_entities[ snap->ps.clientNum ].nextState, qfalse ); - cg_entities[ cg.snap->ps.clientNum ].interpolate = qtrue; - - // check for extrapolation errors - for ( num = 0 ; num < snap->numEntities ; num++ ) { - es = &snap->entities[num]; - cent = &cg_entities[ es->number ]; - - memcpy(¢->nextState, es, sizeof(entityState_t)); - //cent->nextState = *es; - - // if this frame is a teleport, or the entity wasn't in the - // previous frame, don't interpolate - if ( !cent->currentValid || ( ( cent->currentState.eFlags ^ es->eFlags ) & EF_TELEPORT_BIT ) ) { - cent->interpolate = qfalse; - } else { - cent->interpolate = qtrue; - } - } - - // if the next frame is a teleport for the playerstate, we - // can't interpolate during demos - if ( cg.snap && ( ( snap->ps.eFlags ^ cg.snap->ps.eFlags ) & EF_TELEPORT_BIT ) ) { - cg.nextFrameTeleport = qtrue; - } else { - cg.nextFrameTeleport = qfalse; - } - - // if changing follow mode, don't interpolate - if ( cg.nextSnap->ps.clientNum != cg.snap->ps.clientNum ) { - cg.nextFrameTeleport = qtrue; - } - - // if changing server restarts, don't interpolate - if ( ( cg.nextSnap->snapFlags ^ cg.snap->snapFlags ) & SNAPFLAG_SERVERCOUNT ) { - cg.nextFrameTeleport = qtrue; - } - - // sort out solid entities - CG_BuildSolidList(); -} - - -/* -======================== -CG_ReadNextSnapshot - -This is the only place new snapshots are requested -This may increment cgs.processedSnapshotNum multiple -times if the client system fails to return a -valid snapshot. -======================== -*/ -static snapshot_t *CG_ReadNextSnapshot( void ) { - qboolean r; - snapshot_t *dest; - - if ( cg.latestSnapshotNum > cgs.processedSnapshotNum + 1000 ) { - CG_Printf( "WARNING: CG_ReadNextSnapshot: way out of range, %i > %i", - cg.latestSnapshotNum, cgs.processedSnapshotNum ); - } - - while ( cgs.processedSnapshotNum < cg.latestSnapshotNum ) { - // decide which of the two slots to load it into - if ( cg.snap == &cg.activeSnapshots[0] ) { - dest = &cg.activeSnapshots[1]; - } else { - dest = &cg.activeSnapshots[0]; - } - - // try to read the snapshot from the client system - cgs.processedSnapshotNum++; - r = trap_GetSnapshot( cgs.processedSnapshotNum, dest ); - - // FIXME: why would trap_GetSnapshot return a snapshot with the same server time - if ( cg.snap && r && dest->serverTime == cg.snap->serverTime ) { - //continue; - } - - // if it succeeded, return - if ( r ) { - CG_AddLagometerSnapshotInfo( dest ); - return dest; - } - - // a GetSnapshot will return failure if the snapshot - // never arrived, or is so old that its entities - // have been shoved off the end of the circular - // buffer in the client system. - - // record as a dropped packet - CG_AddLagometerSnapshotInfo( NULL ); - - // If there are additional snapshots, continue trying to - // read them. - } - - // nothing left to read - return NULL; -} - - -/* -============ -CG_ProcessSnapshots - -We are trying to set up a renderable view, so determine -what the simulated time is, and try to get snapshots -both before and after that time if available. - -If we don't have a valid cg.snap after exiting this function, -then a 3D game view cannot be rendered. This should only happen -right after the initial connection. After cg.snap has been valid -once, it will never turn invalid. - -Even if cg.snap is valid, cg.nextSnap may not be, if the snapshot -hasn't arrived yet (it becomes an extrapolating situation instead -of an interpolating one) - -============ -*/ -void CG_ProcessSnapshots( void ) { - snapshot_t *snap; - int n; - - // see what the latest snapshot the client system has is - trap_GetCurrentSnapshotNumber( &n, &cg.latestSnapshotTime ); - if ( n != cg.latestSnapshotNum ) { - if ( n < cg.latestSnapshotNum ) { - // this should never happen - CG_Error( "CG_ProcessSnapshots: n < cg.latestSnapshotNum" ); - } - cg.latestSnapshotNum = n; - } - - // If we have yet to receive a snapshot, check for it. - // Once we have gotten the first snapshot, cg.snap will - // always have valid data for the rest of the game - while ( !cg.snap ) { - snap = CG_ReadNextSnapshot(); - if ( !snap ) { - // we can't continue until we get a snapshot - return; - } - - // set our weapon selection to what - // the playerstate is currently using - if ( !( snap->snapFlags & SNAPFLAG_NOT_ACTIVE ) ) { - CG_SetInitialSnapshot( snap ); - } - } - - // loop until we either have a valid nextSnap with a serverTime - // greater than cg.time to interpolate towards, or we run - // out of available snapshots - do { - // if we don't have a nextframe, try and read a new one in - if ( !cg.nextSnap ) { - snap = CG_ReadNextSnapshot(); - - // if we still don't have a nextframe, we will just have to - // extrapolate - if ( !snap ) { - break; - } - - CG_SetNextSnap( snap ); - - // if time went backwards, we have a level restart - if ( cg.nextSnap->serverTime < cg.snap->serverTime ) { - CG_Error( "CG_ProcessSnapshots: Server time went backwards" ); - } - } - - // if our time is < nextFrame's, we have a nice interpolating state - if ( cg.time >= cg.snap->serverTime && cg.time < cg.nextSnap->serverTime ) { - break; - } - - // we have passed the transition from nextFrame to frame - CG_TransitionSnapshot(); - } while ( 1 ); - - // assert our valid conditions upon exiting - if ( cg.snap == NULL ) { - CG_Error( "CG_ProcessSnapshots: cg.snap == NULL" ); - } - if ( cg.time < cg.snap->serverTime ) { - // this can happen right after a vid_restart - cg.time = cg.snap->serverTime; - } - if ( cg.nextSnap != NULL && cg.nextSnap->serverTime <= cg.time ) { - CG_Error( "CG_ProcessSnapshots: cg.nextSnap->serverTime <= cg.time" ); - } - -} - |