home *** CD-ROM | disk | FTP | other *** search
- /*
- Copyright (C) 1997-2001 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 the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- */
-
- #include "server.h"
-
- /*
- =============================================================================
-
- Encode a client frame onto the network channel
-
- =============================================================================
- */
-
-
- /*
- =============
- SV_EmitPacketEntities
-
- Writes a delta update of an entity_state_t list to the message.
- =============
- */
- void SV_EmitPacketEntities (client_frame_t *from, client_frame_t *to, sizebuf_t *msg)
- {
- entity_state_t *oldent, *newent;
- int oldindex, newindex;
- int oldnum, newnum;
- int from_num_entities;
- int bits;
-
- #if 0
- if (numprojs)
- MSG_WriteByte (msg, svc_packetentities2);
- else
- #endif
- MSG_WriteByte (msg, svc_packetentities);
-
- if (!from)
- from_num_entities = 0;
- else
- from_num_entities = from->num_entities;
-
- newindex = 0;
- oldindex = 0;
- while (newindex < to->num_entities || oldindex < from_num_entities)
- {
- if (newindex >= to->num_entities)
- newnum = 9999;
- else
- {
- newent = &svs.client_entities[(to->first_entity+newindex)%svs.num_client_entities];
- newnum = newent->number;
- }
-
- if (oldindex >= from_num_entities)
- oldnum = 9999;
- else
- {
- oldent = &svs.client_entities[(from->first_entity+oldindex)%svs.num_client_entities];
- oldnum = oldent->number;
- }
-
- if (newnum == oldnum)
- { // delta update from old position
- // because the force parm is false, this will not result
- // in any bytes being emited if the entity has not changed at all
- // note that players are always 'newentities', this updates their oldorigin always
- // and prevents warping
- MSG_WriteDeltaEntity (oldent, newent, msg, false, newent->number <= maxclients->value);
- oldindex++;
- newindex++;
- continue;
- }
-
- if (newnum < oldnum)
- { // this is a new entity, send it from the baseline
- MSG_WriteDeltaEntity (&sv.baselines[newnum], newent, msg, true, true);
- newindex++;
- continue;
- }
-
- if (newnum > oldnum)
- { // the old entity isn't present in the new message
- bits = U_REMOVE;
- if (oldnum >= 256)
- bits |= U_NUMBER16 | U_MOREBITS1;
-
- MSG_WriteByte (msg, bits&255 );
- if (bits & 0x0000ff00)
- MSG_WriteByte (msg, (bits>>8)&255 );
-
- if (bits & U_NUMBER16)
- MSG_WriteShort (msg, oldnum);
- else
- MSG_WriteByte (msg, oldnum);
-
- oldindex++;
- continue;
- }
- }
-
- MSG_WriteShort (msg, 0); // end of packetentities
- }
-
-
-
- /*
- =============
- SV_WritePlayerstateToClient
-
- =============
- */
- void SV_WritePlayerstateToClient (client_frame_t *from, client_frame_t *to, sizebuf_t *msg)
- {
- int i;
- int pflags;
- player_state_t *ps, *ops;
- player_state_t dummy;
- int statbits;
-
- ps = &to->ps;
- if (!from)
- {
- memset (&dummy, 0, sizeof(dummy));
- ops = &dummy;
- }
- else
- ops = &from->ps;
-
- //
- // determine what needs to be sent
- //
- pflags = 0;
-
- if (ps->pmove.pm_type != ops->pmove.pm_type)
- pflags |= PS_M_TYPE;
-
- if (ps->pmove.origin[0] != ops->pmove.origin[0]
- || ps->pmove.origin[1] != ops->pmove.origin[1]
- || ps->pmove.origin[2] != ops->pmove.origin[2] )
- pflags |= PS_M_ORIGIN;
-
- if (ps->pmove.velocity[0] != ops->pmove.velocity[0]
- || ps->pmove.velocity[1] != ops->pmove.velocity[1]
- || ps->pmove.velocity[2] != ops->pmove.velocity[2] )
- pflags |= PS_M_VELOCITY;
-
- if (ps->pmove.pm_time != ops->pmove.pm_time)
- pflags |= PS_M_TIME;
-
- if (ps->pmove.pm_flags != ops->pmove.pm_flags)
- pflags |= PS_M_FLAGS;
-
- if (ps->pmove.gravity != ops->pmove.gravity)
- pflags |= PS_M_GRAVITY;
-
- if (ps->pmove.delta_angles[0] != ops->pmove.delta_angles[0]
- || ps->pmove.delta_angles[1] != ops->pmove.delta_angles[1]
- || ps->pmove.delta_angles[2] != ops->pmove.delta_angles[2] )
- pflags |= PS_M_DELTA_ANGLES;
-
-
- if (ps->viewoffset[0] != ops->viewoffset[0]
- || ps->viewoffset[1] != ops->viewoffset[1]
- || ps->viewoffset[2] != ops->viewoffset[2] )
- pflags |= PS_VIEWOFFSET;
-
- if (ps->viewangles[0] != ops->viewangles[0]
- || ps->viewangles[1] != ops->viewangles[1]
- || ps->viewangles[2] != ops->viewangles[2] )
- pflags |= PS_VIEWANGLES;
-
- if (ps->kick_angles[0] != ops->kick_angles[0]
- || ps->kick_angles[1] != ops->kick_angles[1]
- || ps->kick_angles[2] != ops->kick_angles[2] )
- pflags |= PS_KICKANGLES;
-
- if (ps->blend[0] != ops->blend[0]
- || ps->blend[1] != ops->blend[1]
- || ps->blend[2] != ops->blend[2]
- || ps->blend[3] != ops->blend[3] )
- pflags |= PS_BLEND;
-
- if (ps->fov != ops->fov)
- pflags |= PS_FOV;
-
- if (ps->rdflags != ops->rdflags)
- pflags |= PS_RDFLAGS;
-
- if (ps->gunframe != ops->gunframe)
- pflags |= PS_WEAPONFRAME;
-
- pflags |= PS_WEAPONINDEX;
-
- //
- // write it
- //
- MSG_WriteByte (msg, svc_playerinfo);
- MSG_WriteShort (msg, pflags);
-
- //
- // write the pmove_state_t
- //
- if (pflags & PS_M_TYPE)
- MSG_WriteByte (msg, ps->pmove.pm_type);
-
- if (pflags & PS_M_ORIGIN)
- {
- MSG_WriteShort (msg, ps->pmove.origin[0]);
- MSG_WriteShort (msg, ps->pmove.origin[1]);
- MSG_WriteShort (msg, ps->pmove.origin[2]);
- }
-
- if (pflags & PS_M_VELOCITY)
- {
- MSG_WriteShort (msg, ps->pmove.velocity[0]);
- MSG_WriteShort (msg, ps->pmove.velocity[1]);
- MSG_WriteShort (msg, ps->pmove.velocity[2]);
- }
-
- if (pflags & PS_M_TIME)
- MSG_WriteByte (msg, ps->pmove.pm_time);
-
- if (pflags & PS_M_FLAGS)
- MSG_WriteByte (msg, ps->pmove.pm_flags);
-
- if (pflags & PS_M_GRAVITY)
- MSG_WriteShort (msg, ps->pmove.gravity);
-
- if (pflags & PS_M_DELTA_ANGLES)
- {
- MSG_WriteShort (msg, ps->pmove.delta_angles[0]);
- MSG_WriteShort (msg, ps->pmove.delta_angles[1]);
- MSG_WriteShort (msg, ps->pmove.delta_angles[2]);
- }
-
- //
- // write the rest of the player_state_t
- //
- if (pflags & PS_VIEWOFFSET)
- {
- MSG_WriteChar (msg, ps->viewoffset[0]*4);
- MSG_WriteChar (msg, ps->viewoffset[1]*4);
- MSG_WriteChar (msg, ps->viewoffset[2]*4);
- }
-
- if (pflags & PS_VIEWANGLES)
- {
- MSG_WriteAngle16 (msg, ps->viewangles[0]);
- MSG_WriteAngle16 (msg, ps->viewangles[1]);
- MSG_WriteAngle16 (msg, ps->viewangles[2]);
- }
-
- if (pflags & PS_KICKANGLES)
- {
- MSG_WriteChar (msg, ps->kick_angles[0]*4);
- MSG_WriteChar (msg, ps->kick_angles[1]*4);
- MSG_WriteChar (msg, ps->kick_angles[2]*4);
- }
-
- if (pflags & PS_WEAPONINDEX)
- {
- MSG_WriteByte (msg, ps->gunindex);
- }
-
- if (pflags & PS_WEAPONFRAME)
- {
- MSG_WriteByte (msg, ps->gunframe);
- MSG_WriteChar (msg, ps->gunoffset[0]*4);
- MSG_WriteChar (msg, ps->gunoffset[1]*4);
- MSG_WriteChar (msg, ps->gunoffset[2]*4);
- MSG_WriteChar (msg, ps->gunangles[0]*4);
- MSG_WriteChar (msg, ps->gunangles[1]*4);
- MSG_WriteChar (msg, ps->gunangles[2]*4);
- }
-
- if (pflags & PS_BLEND)
- {
- MSG_WriteByte (msg, ps->blend[0]*255);
- MSG_WriteByte (msg, ps->blend[1]*255);
- MSG_WriteByte (msg, ps->blend[2]*255);
- MSG_WriteByte (msg, ps->blend[3]*255);
- }
- if (pflags & PS_FOV)
- MSG_WriteByte (msg, ps->fov);
- if (pflags & PS_RDFLAGS)
- MSG_WriteByte (msg, ps->rdflags);
-
- // send stats
- statbits = 0;
- for (i=0 ; i<MAX_STATS ; i++)
- if (ps->stats[i] != ops->stats[i])
- statbits |= 1<<i;
- MSG_WriteLong (msg, statbits);
- for (i=0 ; i<MAX_STATS ; i++)
- if (statbits & (1<<i) )
- MSG_WriteShort (msg, ps->stats[i]);
- }
-
-
- /*
- ==================
- SV_WriteFrameToClient
- ==================
- */
- void SV_WriteFrameToClient (client_t *client, sizebuf_t *msg)
- {
- client_frame_t *frame, *oldframe;
- int lastframe;
-
- //Com_Printf ("%i -> %i\n", client->lastframe, sv.framenum);
- // this is the frame we are creating
- frame = &client->frames[sv.framenum & UPDATE_MASK];
-
- if (client->lastframe <= 0)
- { // client is asking for a retransmit
- oldframe = NULL;
- lastframe = -1;
- }
- else if (sv.framenum - client->lastframe >= (UPDATE_BACKUP - 3) )
- { // client hasn't gotten a good message through in a long time
- // Com_Printf ("%s: Delta request from out-of-date packet.\n", client->name);
- oldframe = NULL;
- lastframe = -1;
- }
- else
- { // we have a valid message to delta from
- oldframe = &client->frames[client->lastframe & UPDATE_MASK];
- lastframe = client->lastframe;
- }
-
- MSG_WriteByte (msg, svc_frame);
- MSG_WriteLong (msg, sv.framenum);
- MSG_WriteLong (msg, lastframe); // what we are delta'ing from
- MSG_WriteByte (msg, client->surpressCount); // rate dropped packets
- client->surpressCount = 0;
-
- // send over the areabits
- MSG_WriteByte (msg, frame->areabytes);
- SZ_Write (msg, frame->areabits, frame->areabytes);
-
- // delta encode the playerstate
- SV_WritePlayerstateToClient (oldframe, frame, msg);
-
- // delta encode the entities
- SV_EmitPacketEntities (oldframe, frame, msg);
- }
-
-
- /*
- =============================================================================
-
- Build a client frame structure
-
- =============================================================================
- */
-
- byte fatpvs[65536/8]; // 32767 is MAX_MAP_LEAFS
-
- /*
- ============
- SV_FatPVS
-
- The client will interpolate the view position,
- so we can't use a single PVS point
- ===========
- */
- void SV_FatPVS (vec3_t org)
- {
- int leafs[64];
- int i, j, count;
- int longs;
- byte *src;
- vec3_t mins, maxs;
-
- for (i=0 ; i<3 ; i++)
- {
- mins[i] = org[i] - 8;
- maxs[i] = org[i] + 8;
- }
-
- count = CM_BoxLeafnums (mins, maxs, leafs, 64, NULL);
- if (count < 1)
- Com_Error (ERR_FATAL, "SV_FatPVS: count < 1");
- longs = (CM_NumClusters()+31)>>5;
-
- // convert leafs to clusters
- for (i=0 ; i<count ; i++)
- leafs[i] = CM_LeafCluster(leafs[i]);
-
- memcpy (fatpvs, CM_ClusterPVS(leafs[0]), longs<<2);
- // or in all the other leaf bits
- for (i=1 ; i<count ; i++)
- {
- for (j=0 ; j<i ; j++)
- if (leafs[i] == leafs[j])
- break;
- if (j != i)
- continue; // already have the cluster we want
- src = CM_ClusterPVS(leafs[i]);
- for (j=0 ; j<longs ; j++)
- ((long *)fatpvs)[j] |= ((long *)src)[j];
- }
- }
-
-
- /*
- =============
- SV_BuildClientFrame
-
- Decides which entities are going to be visible to the client, and
- copies off the playerstat and areabits.
- =============
- */
- void SV_BuildClientFrame (client_t *client)
- {
- int e, i;
- vec3_t org;
- edict_t *ent;
- edict_t *clent;
- client_frame_t *frame;
- entity_state_t *state;
- int l;
- int clientarea, clientcluster;
- int leafnum;
- int c_fullsend;
- byte *clientphs;
- byte *bitvector;
-
- clent = client->edict;
- if (!clent->client)
- return; // not in game yet
-
- // this is the frame we are creating
- frame = &client->frames[sv.framenum & UPDATE_MASK];
-
- frame->senttime = svs.realtime; // save it for ping calc later
-
- // find the client's PVS
- for (i=0 ; i<3 ; i++)
- org[i] = clent->client->ps.pmove.origin[i]*0.125 + clent->client->ps.viewoffset[i];
-
- leafnum = CM_PointLeafnum (org);
- clientarea = CM_LeafArea (leafnum);
- clientcluster = CM_LeafCluster (leafnum);
-
- // calculate the visible areas
- frame->areabytes = CM_WriteAreaBits (frame->areabits, clientarea);
-
- // grab the current player_state_t
- frame->ps = clent->client->ps;
-
-
- SV_FatPVS (org);
- clientphs = CM_ClusterPHS (clientcluster);
-
- // build up the list of visible entities
- frame->num_entities = 0;
- frame->first_entity = svs.next_client_entities;
-
- c_fullsend = 0;
-
- for (e=1 ; e<ge->num_edicts ; e++)
- {
- ent = EDICT_NUM(e);
-
- // ignore ents without visible models
- if (ent->svflags & SVF_NOCLIENT)
- continue;
-
- // ignore ents without visible models unless they have an effect
- if (!ent->s.modelindex && !ent->s.effects && !ent->s.sound
- && !ent->s.event)
- continue;
-
- // ignore if not touching a PV leaf
- if (ent != clent)
- {
- // check area
- if (!CM_AreasConnected (clientarea, ent->areanum))
- { // doors can legally straddle two areas, so
- // we may need to check another one
- if (!ent->areanum2
- || !CM_AreasConnected (clientarea, ent->areanum2))
- continue; // blocked by a door
- }
-
- // beams just check one point for PHS
- if (ent->s.renderfx & RF_BEAM)
- {
- l = ent->clusternums[0];
- if ( !(clientphs[l >> 3] & (1 << (l&7) )) )
- continue;
- }
- else
- {
- // FIXME: if an ent has a model and a sound, but isn't
- // in the PVS, only the PHS, clear the model
- if (ent->s.sound)
- {
- bitvector = fatpvs; //clientphs;
- }
- else
- bitvector = fatpvs;
-
- if (ent->num_clusters == -1)
- { // too many leafs for individual check, go by headnode
- if (!CM_HeadnodeVisible (ent->headnode, bitvector))
- continue;
- c_fullsend++;
- }
- else
- { // check individual leafs
- for (i=0 ; i < ent->num_clusters ; i++)
- {
- l = ent->clusternums[i];
- if (bitvector[l >> 3] & (1 << (l&7) ))
- break;
- }
- if (i == ent->num_clusters)
- continue; // not visible
- }
-
- if (!ent->s.modelindex)
- { // don't send sounds if they will be attenuated away
- vec3_t delta;
- float len;
-
- VectorSubtract (org, ent->s.origin, delta);
- len = VectorLength (delta);
- if (len > 400)
- continue;
- }
- }
- }
-
- // add it to the circular client_entities array
- state = &svs.client_entities[svs.next_client_entities%svs.num_client_entities];
- if (ent->s.number != e)
- {
- Com_DPrintf ("FIXING ENT->S.NUMBER!!!\n");
- ent->s.number = e;
- }
- *state = ent->s;
-
- // don't mark players missiles as solid
- if (ent->owner == client->edict)
- state->solid = 0;
-
- svs.next_client_entities++;
- frame->num_entities++;
- }
- }
-
-
- /*
- ==================
- SV_RecordDemoMessage
-
- Save everything in the world out without deltas.
- Used for recording footage for merged or assembled demos
- ==================
- */
- void SV_RecordDemoMessage (void)
- {
- int e;
- edict_t *ent;
- entity_state_t nostate;
- sizebuf_t buf;
- byte buf_data[32768];
- int len;
-
- if (!svs.demofile)
- return;
-
- memset (&nostate, 0, sizeof(nostate));
- SZ_Init (&buf, buf_data, sizeof(buf_data));
-
- // write a frame message that doesn't contain a player_state_t
- MSG_WriteByte (&buf, svc_frame);
- MSG_WriteLong (&buf, sv.framenum);
-
- MSG_WriteByte (&buf, svc_packetentities);
-
- e = 1;
- ent = EDICT_NUM(e);
- while (e < ge->num_edicts)
- {
- // ignore ents without visible models unless they have an effect
- if (ent->inuse &&
- ent->s.number &&
- (ent->s.modelindex || ent->s.effects || ent->s.sound || ent->s.event) &&
- !(ent->svflags & SVF_NOCLIENT))
- MSG_WriteDeltaEntity (&nostate, &ent->s, &buf, false, true);
-
- e++;
- ent = EDICT_NUM(e);
- }
-
- MSG_WriteShort (&buf, 0); // end of packetentities
-
- // now add the accumulated multicast information
- SZ_Write (&buf, svs.demo_multicast.data, svs.demo_multicast.cursize);
- SZ_Clear (&svs.demo_multicast);
-
- // now write the entire message to the file, prefixed by the length
- len = LittleLong (buf.cursize);
- fwrite (&len, 4, 1, svs.demofile);
- fwrite (buf.data, buf.cursize, 1, svs.demofile);
- }
-
-