/*
=============================================================================
movevars_t communication
=============================================================================
*/
qboolean MSG_WriteDeltaMovevars( sizebuf_t *msg, movevars_t *from, movevars_t *to )
{
delta_t *pField;
delta_info_t *dt;
int i, startBit;
int numChanges = 0;
dt = Delta_FindStruct( "movevars_t" );
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
startBit = msg->iCurBit;
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
BF_WriteByte( msg, svc_deltamovevars );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
if( Delta_WriteField( msg, pField, from, to, 0.0f ))
numChanges++;
}
// if we have no changes - kill the message
if( !numChanges )
{
BF_SeekToBit( msg, startBit );
return false;
}
return true;
}
/*
==================
MSG_WriteWeaponData
Writes current client data only for local client
Other clients can grab the client state from entity_state_t
==================
*/
void MSG_WriteWeaponData( sizebuf_t *msg, weapon_data_t *from, weapon_data_t *to, float timebase, int index )
{
delta_t *pField;
delta_info_t *dt;
int i, startBit;
int numChanges = 0;
dt = Delta_FindStruct( "weapon_data_t" );
if( !dt || !dt->bInitialized )
{
Host_Error( "MSG_WriteWeaponData: delta not initialized!\n" );
}
pField = dt->pFields;
ASSERT( pField );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
startBit = msg->iCurBit;
BF_WriteOneBit( msg, 1 );
BF_WriteUBitLong( msg, index, MAX_WEAPON_BITS );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
if( Delta_WriteField( msg, pField, from, to, timebase ))
numChanges++;
}
// if we have no changes - kill the message
if( !numChanges ) BF_SeekToBit( msg, startBit );
}
void Delta_Init( void )
{
delta_info_t *dt;
// shutdown it first
if( delta_init ) Delta_Shutdown ();
Delta_InitFields (); // initialize fields
delta_init = true;
dt = Delta_FindStruct( "movevars_t" );
ASSERT( dt != NULL );
if( dt->bInitialized ) return; // "movevars_t" already specified by user
// create movevars_t delta internal
Delta_AddField( "movevars_t", "gravity", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "stopspeed", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "maxspeed", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "spectatormaxspeed", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "accelerate", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "airaccelerate", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "wateraccelerate", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "friction", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "edgefriction", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "waterfriction", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "bounce", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "stepsize", DT_FLOAT|DT_SIGNED, 16, 16.0f, 1.0f );
Delta_AddField( "movevars_t", "maxvelocity", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
if( host.features & ENGINE_WRITE_LARGE_COORD )
Delta_AddField( "movevars_t", "zmax", DT_FLOAT|DT_SIGNED, 18, 1.0f, 1.0f ); // no fractional part
else
Delta_AddField( "movevars_t", "zmax", DT_FLOAT|DT_SIGNED, 16, 1.0f, 1.0f ); // no fractional part
Delta_AddField( "movevars_t", "waveHeight", DT_FLOAT|DT_SIGNED, 16, 16.0f, 8.0f );
Delta_AddField( "movevars_t", "skyName", DT_STRING, 1, 1.0f, 1.0f );
Delta_AddField( "movevars_t", "footsteps", DT_INTEGER, 1, 1.0f, 1.0f );
Delta_AddField( "movevars_t", "rollangle", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f );
Delta_AddField( "movevars_t", "rollspeed", DT_FLOAT|DT_SIGNED, 16, 8.0f, 1.0f );
Delta_AddField( "movevars_t", "skycolor_r", DT_FLOAT|DT_SIGNED, 12, 1.0f, 1.0f ); // 0 - 264
Delta_AddField( "movevars_t", "skycolor_g", DT_FLOAT|DT_SIGNED, 12, 1.0f, 1.0f );
Delta_AddField( "movevars_t", "skycolor_b", DT_FLOAT|DT_SIGNED, 12, 1.0f, 1.0f );
Delta_AddField( "movevars_t", "skyvec_x", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f ); // 0 - 1
Delta_AddField( "movevars_t", "skyvec_y", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f );
Delta_AddField( "movevars_t", "skyvec_z", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f );
Delta_AddField( "movevars_t", "skydir_x", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f ); // 0 - 1
Delta_AddField( "movevars_t", "skydir_y", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f );
Delta_AddField( "movevars_t", "skydir_z", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f );
Delta_AddField( "movevars_t", "skyangle", DT_ANGLE, 16, 1.0f, 1.0f ); // 0 - 360
Delta_AddField( "movevars_t", "wateralpha", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f );
Delta_AddField( "movevars_t", "fog_settings", DT_INTEGER, 32, 1.0f, 1.0f );
// now done
dt->bInitialized = true;
}
qboolean Delta_AddField( const char *pStructName, const char *pName, int flags, int bits, float mul, float post_mul )
{
delta_info_t *dt;
delta_field_t *pFieldInfo;
delta_t *pField;
int i;
// get the delta struct
dt = Delta_FindStruct( pStructName );
ASSERT( dt != NULL );
// check for coexisting field
for( i = 0, pField = dt->pFields; i < dt->numFields; i++, pField++ )
{
if( !Q_strcmp( pField->name, pName ))
{
MsgDev( D_NOTE, "Delta_Add: %s->%s already existing\n", pStructName, pName );
return false; // field already exist
}
}
// find field description
pFieldInfo = Delta_FindFieldInfo( dt->pInfo, pName );
if( !pFieldInfo )
{
MsgDev( D_ERROR, "Delta_Add: couldn't find description for %s->%s\n", pStructName, pName );
return false;
}
if( dt->numFields + 1 > dt->maxFields )
{
MsgDev( D_WARN, "Delta_Add: can't add %s->%s encoder list is full\n", pStructName, pName );
return false; // too many fields specified (duplicated ?)
}
// allocate a new one
dt->pFields = Z_Realloc( dt->pFields, (dt->numFields + 1) * sizeof( delta_t ));
for( i = 0, pField = dt->pFields; i < dt->numFields; i++, pField++ );
// copy info to new field
pField->name = pFieldInfo->name;
pField->offset = pFieldInfo->offset;
pField->size = pFieldInfo->size;
pField->flags = flags;
pField->bits = bits;
pField->multiplier = mul;
pField->post_multiplier = post_mul;
dt->numFields++;
return true;
}
void Delta_InitFields( void )
{
char *afile, *pfile;
string encodeDll, encodeFunc, token;
delta_info_t *dt;
afile = FS_LoadFile( DELTA_PATH, NULL, false );
if( !afile )
{
static string errormsg;
Q_snprintf( errormsg, sizeof( errormsg ), "DELTA_Load: couldn't load file %s\n", DELTA_PATH );
Sys_Error( errormsg );
}
pfile = afile;
while(( pfile = COM_ParseFile( pfile, token )) != NULL )
{
dt = Delta_FindStruct( token );
if( dt == NULL )
{
Sys_Error( "delta.lst: unknown struct %s\n", token );
}
pfile = COM_ParseFile( pfile, encodeDll );
if( !Q_stricmp( encodeDll, "none" ))
Q_strcpy( encodeFunc, "null" );
else pfile = COM_ParseFile( pfile, encodeFunc );
// jump to '{'
pfile = COM_ParseFile( pfile, token );
if( token[0] != '{' )
{
Sys_Error( "delta.lst: missing '{' in section %s\n", dt->pName );
}
Delta_ParseTable( &pfile, dt, encodeDll, encodeFunc );
}
Mem_Free( afile );
// adding some requrid fields fields that user may forget or don't know how to specified
Delta_AddField( "event_t", "velocity[0]", DT_SIGNED | DT_FLOAT, 16, 8.0f, 1.0f );
Delta_AddField( "event_t", "velocity[1]", DT_SIGNED | DT_FLOAT, 16, 8.0f, 1.0f );
Delta_AddField( "event_t", "velocity[2]", DT_SIGNED | DT_FLOAT, 16, 8.0f, 1.0f );
}
/*
==================
MSG_ReadWeaponData
Read the clientdata
==================
*/
void MSG_ReadWeaponData( sizebuf_t *msg, weapon_data_t *from, weapon_data_t *to, float timebase )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "weapon_data_t" );
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, timebase );
}
}
void MSG_ReadDeltaMovevars( sizebuf_t *msg, movevars_t *from, movevars_t *to )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "movevars_t" );
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, 0.0f );
}
}
/*
==================
MSG_WriteClientData
Writes current client data only for local client
Other clients can grab the client state from entity_state_t
==================
*/
void MSG_WriteClientData( sizebuf_t *msg, clientdata_t *from, clientdata_t *to, float timebase )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "clientdata_t" );
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_WriteField( msg, pField, from, to, timebase );
}
}
/*
=====================
MSG_WriteDeltaEvent
=====================
*/
void MSG_WriteDeltaEvent( sizebuf_t *msg, event_args_t *from, event_args_t *to )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "event_t" );
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_WriteField( msg, pField, from, to, 0.0f );
}
}
/*
==================
MSG_ReadClientData
Read the clientdata
==================
*/
void MSG_ReadClientData( sizebuf_t *msg, clientdata_t *from, clientdata_t *to, float timebase )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "clientdata_t" );
if( !dt || !dt->bInitialized )
{
Host_Error( "MSG_ReadClientData: delta not initialized!\n" );
}
pField = dt->pFields;
ASSERT( pField );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, timebase );
}
}
/*
=====================
MSG_ReadDeltaEvent
=====================
*/
void MSG_ReadDeltaEvent( sizebuf_t *msg, event_args_t *from, event_args_t *to )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "event_t" );
if( !dt || !dt->bInitialized )
{
Host_Error( "MSG_ReadDeltaEvent: delta not initialized!\n" );
}
pField = dt->pFields;
ASSERT( pField );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, 0.0f );
}
}
/*
=====================
MSG_WriteDeltaUsercmd
=====================
*/
void MSG_WriteDeltaUsercmd( sizebuf_t *msg, usercmd_t *from, usercmd_t *to )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "usercmd_t" );
if( !dt || !dt->bInitialized )
{
Host_Error( "MSG_WriteDeltaUsercmd: delta not initialized!\n" );
}
pField = dt->pFields;
ASSERT( pField );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_WriteField( msg, pField, from, to, 0.0f );
}
}
/*
==================
MSG_ReadDeltaEntity
The entity number has already been read from the message, which
is how the from state is identified.
If the delta removes the entity, entity_state_t->number will be set to MAX_EDICTS
Can go from either a baseline or a previous packet_entity
==================
*/
qboolean MSG_ReadDeltaEntity( sizebuf_t *msg, entity_state_t *from, entity_state_t *to, int number, qboolean player, float timebase )
{
delta_info_t *dt = NULL;
delta_t *pField;
int i, fRemoveType;
#ifndef XASH_DEDICATED
if( number < 0 || number >= clgame.maxEntities )
{
// broken packet, try to skip it
MsgDev( D_ERROR, "MSG_ReadDeltaEntity: bad delta entity number: %i\n", number );
return false;
}
*to = *from;
to->number = number;
fRemoveType = BF_ReadUBitLong( msg, 2 );
if( fRemoveType )
{
// check for a remove
Q_memset( to, 0, sizeof( *to ));
if( fRemoveType & 1 )
{
// removed from delta-message
return false;
}
if( fRemoveType & 2 )
{
// entity was removed from server
to->number = -1;
return false;
}
MsgDev( D_ERROR, "MSG_ReadDeltaEntity: unknown update type %i\n", fRemoveType );
return false;
}
if( BF_ReadOneBit( msg ))
to->entityType = BF_ReadUBitLong( msg, 2 );
if( to->entityType == ENTITY_BEAM )
{
dt = Delta_FindStruct( "custom_entity_state_t" );
}
else // ENTITY_NORMAL or other (try predict type)
{
/* Omit connection drop on wromg data from server.
* I know that it is very dirty,
* but i don't know how to do it better.*/
if( to->entityType != ENTITY_NORMAL )
MsgDev( D_NOTE, "MSG_ReadDeltaEntity: broken delta: entityType = %d\n", to->entityType );
if( player )
{
dt = Delta_FindStruct( "entity_state_player_t" );
}
else
{
dt = Delta_FindStruct( "entity_state_t" );
}
}
if( !(dt && dt->bInitialized) ) // Broken delta?
{
MsgDev( D_ERROR, "MSG_ReadDeltaEntity: broken delta\n");
return true;
}
pField = dt->pFields;
ASSERT( pField );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, timebase );
}
#endif
// message parsed
return true;
}
/*
==================
MSG_WriteDeltaEntity
Writes part of a packetentities message, including the entity number.
Can delta from either a baseline or a previous packet_entity
If to is NULL, a remove entity update will be sent
If force is not set, then nothing at all will be generated if the entity is
identical, under the assumption that the in-order delta code will catch it.
==================
*/
void MSG_WriteDeltaEntity( entity_state_t *from, entity_state_t *to, sizebuf_t *msg, qboolean force, qboolean player, float timebase )
{
delta_info_t *dt = NULL;
delta_t *pField;
int i, startBit;
int numChanges = 0;
if( to == NULL )
{
int fRemoveType;
if( from == NULL ) return;
// a NULL to is a delta remove message
BF_WriteWord( msg, from->number );
// fRemoveType:
// 0 - keep alive, has delta-update
// 1 - remove from delta message (but keep states)
// 2 - completely remove from server
if( force ) fRemoveType = 2;
else fRemoveType = 1;
BF_WriteUBitLong( msg, fRemoveType, 2 );
return;
}
startBit = msg->iCurBit;
if( to->number < 0 || to->number >= GI->max_edicts )
{
MsgDev( D_ERROR, "MSG_WriteDeltaEntity: Bad entity number: %i\n", to->number );
return;
}
BF_WriteWord( msg, to->number );
BF_WriteUBitLong( msg, 0, 2 ); // alive
if( to->entityType != from->entityType )
{
BF_WriteOneBit( msg, 1 );
BF_WriteUBitLong( msg, to->entityType, 2 );
}
else BF_WriteOneBit( msg, 0 );
if( to->entityType == ENTITY_NORMAL )
{
if( player )
{
dt = Delta_FindStruct( "entity_state_player_t" );
}
else
{
dt = Delta_FindStruct( "entity_state_t" );
}
}
else if( to->entityType == ENTITY_BEAM )
{
dt = Delta_FindStruct( "custom_entity_state_t" );
}
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
if( Delta_WriteField( msg, pField, from, to, timebase ))
numChanges++;
}
// if we have no changes - kill the message
if( !numChanges && !force ) BF_SeekToBit( msg, startBit );
}
/*
==================
MSG_ReadDeltaEntity
The entity number has already been read from the message, which
is how the from state is identified.
If the delta removes the entity, entity_state_t->number will be set to MAX_EDICTS
Can go from either a baseline or a previous packet_entity
==================
*/
qboolean MSG_ReadDeltaEntity( sizebuf_t *msg, entity_state_t *from, entity_state_t *to, int number, qboolean player, float timebase )
{
delta_info_t *dt = NULL;
delta_t *pField;
int i, fRemoveType;
#ifndef _DEDICATED
if( number < 0 || number >= clgame.maxEntities )
Host_Error( "MSG_ReadDeltaEntity: bad delta entity number: %i\n", number );
#endif
*to = *from;
to->number = number;
fRemoveType = BF_ReadUBitLong( msg, 2 );
if( fRemoveType )
{
// check for a remove
Q_memset( to, 0, sizeof( *to ));
if( fRemoveType & 1 )
{
// removed from delta-message
return false;
}
if( fRemoveType & 2 )
{
// entity was removed from server
to->number = -1;
return false;
}
Host_Error( "MSG_ReadDeltaEntity: unknown update type %i\n", fRemoveType );
}
if( BF_ReadOneBit( msg ))
to->entityType = BF_ReadUBitLong( msg, 2 );
if( to->entityType == ENTITY_NORMAL )
{
if( player )
{
dt = Delta_FindStruct( "entity_state_player_t" );
}
else
{
dt = Delta_FindStruct( "entity_state_t" );
}
}
else if( to->entityType == ENTITY_BEAM )
{
dt = Delta_FindStruct( "custom_entity_state_t" );
}
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, timebase );
}
// message parsed
return true;
}
