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xash3d-fwgs/engine/common/net_encode.c

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/*
net_encode.c - encode network messages
Copyright (C) 2010 Uncle Mike
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 3 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.
*/
#include "common.h"
#include "netchan.h"
#include "xash3d_mathlib.h"
#include "net_encode.h"
#include "event_api.h"
#include "usercmd.h"
#include "pm_movevars.h"
#include "entity_state.h"
#include "weaponinfo.h"
#include "event_args.h"
#include "protocol.h"
#include "client.h"
#define DELTA_PATH "delta.lst"
static qboolean delta_init = false;
// list of all the struct names
static const delta_field_t cmd_fields[] =
{
{ UCMD_DEF( lerp_msec ) },
{ UCMD_DEF( msec ) },
{ UCMD_DEF( viewangles[0] ) },
{ UCMD_DEF( viewangles[1] ) },
{ UCMD_DEF( viewangles[2] ) },
{ UCMD_DEF( forwardmove ) },
{ UCMD_DEF( sidemove ) },
{ UCMD_DEF( upmove ) },
{ UCMD_DEF( lightlevel ) },
{ UCMD_DEF( buttons ) },
{ UCMD_DEF( impulse ) },
{ UCMD_DEF( weaponselect ) },
{ UCMD_DEF( impact_index ) },
{ UCMD_DEF( impact_position[0] ) },
{ UCMD_DEF( impact_position[1] ) },
{ UCMD_DEF( impact_position[2] ) },
{ NULL },
};
static const delta_field_t pm_fields[] =
{
{ PHYS_DEF( gravity ) },
{ PHYS_DEF( stopspeed ) },
{ PHYS_DEF( maxspeed ) },
{ PHYS_DEF( spectatormaxspeed ) },
{ PHYS_DEF( accelerate ) },
{ PHYS_DEF( airaccelerate ) },
{ PHYS_DEF( wateraccelerate ) },
{ PHYS_DEF( friction ) },
{ PHYS_DEF( edgefriction ) },
{ PHYS_DEF( waterfriction ) },
{ PHYS_DEF( bounce ) },
{ PHYS_DEF( stepsize ) },
{ PHYS_DEF( maxvelocity ) },
{ PHYS_DEF( zmax ) },
{ PHYS_DEF( waveHeight ) },
{ PHYS_DEF( footsteps ) },
{ PHYS_DEF( skyName ) },
{ PHYS_DEF( rollangle ) },
{ PHYS_DEF( rollspeed ) },
{ PHYS_DEF( skycolor_r ) },
{ PHYS_DEF( skycolor_g ) },
{ PHYS_DEF( skycolor_b ) },
{ PHYS_DEF( skyvec_x ) },
{ PHYS_DEF( skyvec_y ) },
{ PHYS_DEF( skyvec_z ) },
{ PHYS_DEF( fog_settings ) },
{ PHYS_DEF( wateralpha ) },
{ PHYS_DEF( skydir_x ) },
{ PHYS_DEF( skydir_y ) },
{ PHYS_DEF( skydir_z ) },
{ PHYS_DEF( skyangle ) },
{ NULL },
};
static const delta_field_t ev_fields[] =
{
{ EVNT_DEF( flags ) },
{ EVNT_DEF( entindex ) },
{ EVNT_DEF( origin[0] ) },
{ EVNT_DEF( origin[1] ) },
{ EVNT_DEF( origin[2] ) },
{ EVNT_DEF( angles[0] ) },
{ EVNT_DEF( angles[1] ) },
{ EVNT_DEF( angles[2] ) },
{ EVNT_DEF( velocity[0] ) },
{ EVNT_DEF( velocity[1] ) },
{ EVNT_DEF( velocity[2] ) },
{ EVNT_DEF( ducking ) },
{ EVNT_DEF( fparam1 ) },
{ EVNT_DEF( fparam2 ) },
{ EVNT_DEF( iparam1 ) },
{ EVNT_DEF( iparam2 ) },
{ EVNT_DEF( bparam1 ) },
{ EVNT_DEF( bparam2 ) },
{ NULL },
};
static const delta_field_t wd_fields[] =
{
{ WPDT_DEF( m_iId ) },
{ WPDT_DEF( m_iClip ) },
{ WPDT_DEF( m_flNextPrimaryAttack ) },
{ WPDT_DEF( m_flNextSecondaryAttack ) },
{ WPDT_DEF( m_flTimeWeaponIdle ) },
{ WPDT_DEF( m_fInReload ) },
{ WPDT_DEF( m_fInSpecialReload ) },
{ WPDT_DEF( m_flNextReload ) },
{ WPDT_DEF( m_flPumpTime ) },
{ WPDT_DEF( m_fReloadTime ) },
{ WPDT_DEF( m_fAimedDamage ) },
{ WPDT_DEF( m_fNextAimBonus ) },
{ WPDT_DEF( m_fInZoom ) },
{ WPDT_DEF( m_iWeaponState ) },
{ WPDT_DEF( iuser1 ) },
{ WPDT_DEF( iuser2 ) },
{ WPDT_DEF( iuser3 ) },
{ WPDT_DEF( iuser4 ) },
{ WPDT_DEF( fuser1 ) },
{ WPDT_DEF( fuser2 ) },
{ WPDT_DEF( fuser3 ) },
{ WPDT_DEF( fuser4 ) },
{ NULL },
};
static const delta_field_t cd_fields[] =
{
{ CLDT_DEF( origin[0] ) },
{ CLDT_DEF( origin[1] ) },
{ CLDT_DEF( origin[2] ) },
{ CLDT_DEF( velocity[0] ) },
{ CLDT_DEF( velocity[1] ) },
{ CLDT_DEF( velocity[2] ) },
{ CLDT_DEF( viewmodel ) },
{ CLDT_DEF( punchangle[0] ) },
{ CLDT_DEF( punchangle[1] ) },
{ CLDT_DEF( punchangle[2] ) },
{ CLDT_DEF( flags ) },
{ CLDT_DEF( waterlevel ) },
{ CLDT_DEF( watertype ) },
{ CLDT_DEF( view_ofs[0] ) },
{ CLDT_DEF( view_ofs[1] ) },
{ CLDT_DEF( view_ofs[2] ) },
{ CLDT_DEF( health ) },
{ CLDT_DEF( bInDuck ) },
{ CLDT_DEF( weapons ) },
{ CLDT_DEF( flTimeStepSound ) },
{ CLDT_DEF( flDuckTime ) },
{ CLDT_DEF( flSwimTime ) },
{ CLDT_DEF( waterjumptime ) },
{ CLDT_DEF( maxspeed ) },
{ CLDT_DEF( fov ) },
{ CLDT_DEF( weaponanim ) },
{ CLDT_DEF( m_iId ) },
{ CLDT_DEF( ammo_shells ) },
{ CLDT_DEF( ammo_nails ) },
{ CLDT_DEF( ammo_cells ) },
{ CLDT_DEF( ammo_rockets ) },
{ CLDT_DEF( m_flNextAttack ) },
{ CLDT_DEF( tfstate ) },
{ CLDT_DEF( pushmsec ) },
{ CLDT_DEF( deadflag ) },
{ CLDT_DEF( physinfo ) },
{ CLDT_DEF( iuser1 ) },
{ CLDT_DEF( iuser2 ) },
{ CLDT_DEF( iuser3 ) },
{ CLDT_DEF( iuser4 ) },
{ CLDT_DEF( fuser1 ) },
{ CLDT_DEF( fuser2 ) },
{ CLDT_DEF( fuser3 ) },
{ CLDT_DEF( fuser4 ) },
{ CLDT_DEF( vuser1[0] ) },
{ CLDT_DEF( vuser1[1] ) },
{ CLDT_DEF( vuser1[2] ) },
{ CLDT_DEF( vuser2[0] ) },
{ CLDT_DEF( vuser2[1] ) },
{ CLDT_DEF( vuser2[2] ) },
{ CLDT_DEF( vuser3[0] ) },
{ CLDT_DEF( vuser3[1] ) },
{ CLDT_DEF( vuser3[2] ) },
{ CLDT_DEF( vuser4[0] ) },
{ CLDT_DEF( vuser4[1] ) },
{ CLDT_DEF( vuser4[2] ) },
{ NULL },
};
static const delta_field_t ent_fields[] =
{
{ ENTS_DEF( entityType ) },
{ ENTS_DEF( origin[0] ) },
{ ENTS_DEF( origin[1] ) },
{ ENTS_DEF( origin[2] ) },
{ ENTS_DEF( angles[0] ) },
{ ENTS_DEF( angles[1] ) },
{ ENTS_DEF( angles[2] ) },
{ ENTS_DEF( modelindex ) },
{ ENTS_DEF( sequence ) },
{ ENTS_DEF( frame ) },
{ ENTS_DEF( colormap ) },
{ ENTS_DEF( skin ) },
{ ENTS_DEF( solid ) },
{ ENTS_DEF( effects ) },
{ ENTS_DEF( scale ) },
{ ENTS_DEF( eflags ) },
{ ENTS_DEF( rendermode ) },
{ ENTS_DEF( renderamt ) },
{ ENTS_DEF( rendercolor.r ) },
{ ENTS_DEF( rendercolor.g ) },
{ ENTS_DEF( rendercolor.b ) },
{ ENTS_DEF( renderfx ) },
{ ENTS_DEF( movetype ) },
{ ENTS_DEF( animtime ) },
{ ENTS_DEF( framerate ) },
{ ENTS_DEF( body ) },
{ ENTS_DEF( controller[0] ) },
{ ENTS_DEF( controller[1] ) },
{ ENTS_DEF( controller[2] ) },
{ ENTS_DEF( controller[3] ) },
{ ENTS_DEF( blending[0] ) },
{ ENTS_DEF( blending[1] ) },
{ ENTS_DEF( blending[2] ) },
{ ENTS_DEF( blending[3] ) },
{ ENTS_DEF( velocity[0] ) },
{ ENTS_DEF( velocity[1] ) },
{ ENTS_DEF( velocity[2] ) },
{ ENTS_DEF( mins[0] ) },
{ ENTS_DEF( mins[1] ) },
{ ENTS_DEF( mins[2] ) },
{ ENTS_DEF( maxs[0] ) },
{ ENTS_DEF( maxs[1] ) },
{ ENTS_DEF( maxs[2] ) },
{ ENTS_DEF( aiment ) },
{ ENTS_DEF( owner ) },
{ ENTS_DEF( friction ) },
{ ENTS_DEF( gravity ) },
{ ENTS_DEF( team ) },
{ ENTS_DEF( playerclass ) },
{ ENTS_DEF( health ) },
{ ENTS_DEF( spectator ) },
{ ENTS_DEF( weaponmodel ) },
{ ENTS_DEF( gaitsequence ) },
{ ENTS_DEF( basevelocity[0] ) },
{ ENTS_DEF( basevelocity[1] ) },
{ ENTS_DEF( basevelocity[2] ) },
{ ENTS_DEF( usehull ) },
{ ENTS_DEF( oldbuttons ) }, // probably never transmitted
{ ENTS_DEF( onground ) },
{ ENTS_DEF( iStepLeft ) },
{ ENTS_DEF( flFallVelocity ) },
{ ENTS_DEF( fov ) },
{ ENTS_DEF( weaponanim ) },
{ ENTS_DEF( startpos[0] ) },
{ ENTS_DEF( startpos[1] ) },
{ ENTS_DEF( startpos[2] ) },
{ ENTS_DEF( endpos[0] ) },
{ ENTS_DEF( endpos[1] ) },
{ ENTS_DEF( endpos[2] ) },
{ ENTS_DEF( impacttime ) },
{ ENTS_DEF( starttime ) },
{ ENTS_DEF( iuser1 ) },
{ ENTS_DEF( iuser2 ) },
{ ENTS_DEF( iuser3 ) },
{ ENTS_DEF( iuser4 ) },
{ ENTS_DEF( fuser1 ) },
{ ENTS_DEF( fuser2 ) },
{ ENTS_DEF( fuser3 ) },
{ ENTS_DEF( fuser4 ) },
{ ENTS_DEF( vuser1[0] ) },
{ ENTS_DEF( vuser1[1] ) },
{ ENTS_DEF( vuser1[2] ) },
{ ENTS_DEF( vuser2[0] ) },
{ ENTS_DEF( vuser2[1] ) },
{ ENTS_DEF( vuser2[2] ) },
{ ENTS_DEF( vuser3[0] ) },
{ ENTS_DEF( vuser3[1] ) },
{ ENTS_DEF( vuser3[2] ) },
{ ENTS_DEF( vuser4[0] ) },
{ ENTS_DEF( vuser4[1] ) },
{ ENTS_DEF( vuser4[2] ) },
{ NULL },
};
static delta_info_t dt_info[] =
{
{ "event_t", ev_fields, NUM_FIELDS( ev_fields ) },
{ "movevars_t", pm_fields, NUM_FIELDS( pm_fields ) },
{ "usercmd_t", cmd_fields, NUM_FIELDS( cmd_fields ) },
{ "clientdata_t", cd_fields, NUM_FIELDS( cd_fields ) },
{ "weapon_data_t", wd_fields, NUM_FIELDS( wd_fields ) },
{ "entity_state_t", ent_fields, NUM_FIELDS( ent_fields ) },
{ "entity_state_player_t", ent_fields, NUM_FIELDS( ent_fields ) },
{ "custom_entity_state_t", ent_fields, NUM_FIELDS( ent_fields ) },
{ NULL },
};
delta_info_t *Delta_FindStruct( const char *name )
{
int i;
if( !COM_CheckString( name ))
return NULL;
for( i = 0; i < NUM_FIELDS( dt_info ); i++ )
{
if( !Q_stricmp( dt_info[i].pName, name ))
return &dt_info[i];
}
Con_DPrintf( S_WARN "Struct %s not found in delta_info\n", name );
// found nothing
return NULL;
}
int Delta_NumTables( void )
{
return NUM_FIELDS( dt_info );
}
delta_info_t *Delta_FindStructByIndex( int index )
{
if( index < 0 || index >= NUM_FIELDS( dt_info ))
return NULL;
return &dt_info[index];
}
delta_info_t *Delta_FindStructByEncoder( const char *encoderName )
{
int i;
if( !encoderName || !encoderName[0] )
return NULL;
for( i = 0; i < NUM_FIELDS( dt_info ); i++ )
{
if( !Q_stricmp( dt_info[i].funcName, encoderName ))
return &dt_info[i];
}
// found nothing
return NULL;
}
delta_info_t *Delta_FindStructByDelta( const delta_t *pFields )
{
int i;
if( !pFields ) return NULL;
for( i = 0; i < NUM_FIELDS( dt_info ); i++ )
{
if( dt_info[i].pFields == pFields )
return &dt_info[i];
}
// found nothing
return NULL;
}
void Delta_CustomEncode( delta_info_t *dt, const void *from, const void *to )
{
int i;
Assert( dt != NULL );
// set all fields is active by default
for( i = 0; i < dt->numFields; i++ )
dt->pFields[i].bInactive = false;
if( dt->userCallback )
{
dt->userCallback( dt->pFields, from, to );
}
}
delta_field_t *Delta_FindFieldInfo( const delta_field_t *pInfo, const char *fieldName )
{
if( !fieldName || !*fieldName )
return NULL;
for( ; pInfo->name; pInfo++ )
{
if( !Q_strcmp( pInfo->name, fieldName ))
return (delta_field_t *)pInfo;
}
return NULL;
}
int Delta_IndexForFieldInfo( const delta_field_t *pInfo, const char *fieldName )
{
int i;
if( !fieldName || !*fieldName )
return -1;
for( i = 0; pInfo->name; i++, pInfo++ )
{
if( !Q_strcmp( pInfo->name, fieldName ))
return i;
}
return -1;
}
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 ))
{
// update existed field
pField->flags = flags;
pField->bits = bits;
pField->multiplier = mul;
pField->post_multiplier = post_mul;
return true;
}
}
// find field description
pFieldInfo = Delta_FindFieldInfo( dt->pInfo, pName );
if( !pFieldInfo )
{
Con_DPrintf( S_ERROR "Delta_Add: couldn't find description for %s->%s\n", pStructName, pName );
return false;
}
if( dt->numFields + 1 > dt->maxFields )
{
Con_DPrintf( S_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_WriteTableField( sizebuf_t *msg, int tableIndex, const delta_t *pField )
{
int nameIndex;
delta_info_t *dt;
Assert( pField != NULL );
if( !COM_CheckString( pField->name ))
return; // not initialized ?
dt = Delta_FindStructByIndex( tableIndex );
Assert( dt && dt->bInitialized );
nameIndex = Delta_IndexForFieldInfo( dt->pInfo, pField->name );
Assert( nameIndex >= 0 && nameIndex < dt->maxFields );
MSG_BeginServerCmd( msg, svc_deltatable );
MSG_WriteUBitLong( msg, tableIndex, 4 ); // assume we support 16 network tables
MSG_WriteUBitLong( msg, nameIndex, 8 ); // 255 fields by struct should be enough
MSG_WriteUBitLong( msg, pField->flags, 10 ); // flags are indicated various input types
MSG_WriteUBitLong( msg, pField->bits - 1, 5 ); // max received value is 32 (32 bit)
// multipliers is null-compressed
if( pField->multiplier != 1.0f )
{
MSG_WriteOneBit( msg, 1 );
MSG_WriteFloat( msg, pField->multiplier );
}
else MSG_WriteOneBit( msg, 0 );
if( pField->post_multiplier != 1.0f )
{
MSG_WriteOneBit( msg, 1 );
MSG_WriteFloat( msg, pField->post_multiplier );
}
else MSG_WriteOneBit( msg, 0 );
}
void Delta_ParseTableField( sizebuf_t *msg )
{
int tableIndex, nameIndex;
float mul = 1.0f, post_mul = 1.0f;
int flags, bits;
const char *pName;
qboolean ignore = false;
delta_info_t *dt;
tableIndex = MSG_ReadUBitLong( msg, 4 );
dt = Delta_FindStructByIndex( tableIndex );
if( !dt )
Host_Error( "Delta_ParseTableField: not initialized" );
nameIndex = MSG_ReadUBitLong( msg, 8 ); // read field name index
if( ( nameIndex >= 0 && nameIndex < dt->maxFields ) )
{
pName = dt->pInfo[nameIndex].name;
}
else
{
ignore = true;
Con_Reportf( "Delta_ParseTableField: wrong nameIndex %d for table %s, ignoring\n", nameIndex, dt->pName );
}
flags = MSG_ReadUBitLong( msg, 10 );
bits = MSG_ReadUBitLong( msg, 5 ) + 1;
// read the multipliers
if( MSG_ReadOneBit( msg ))
mul = MSG_ReadFloat( msg );
if( MSG_ReadOneBit( msg ))
post_mul = MSG_ReadFloat( msg );
if( ignore )
return;
// delta encoders it's already initialized on this machine (local game)
if( delta_init )
Delta_Shutdown();
// add field to table
Delta_AddField( dt->pName, pName, flags, bits, mul, post_mul );
}
qboolean Delta_ParseField( char **delta_script, const delta_field_t *pInfo, delta_t *pField, qboolean bPost )
{
string token;
delta_field_t *pFieldInfo;
char *oldpos;
*delta_script = COM_ParseFile( *delta_script, token );
if( Q_strcmp( token, "(" ))
{
Con_DPrintf( S_ERROR "Delta_ParseField: expected '(', found '%s' instead\n", token );
return false;
}
// read the variable name
if(( *delta_script = COM_ParseFile( *delta_script, token )) == NULL )
{
Con_DPrintf( S_ERROR "Delta_ParseField: missing field name\n" );
return false;
}
pFieldInfo = Delta_FindFieldInfo( pInfo, token );
if( !pFieldInfo )
{
Con_DPrintf( S_ERROR "Delta_ParseField: unable to find field %s\n", token );
return false;
}
*delta_script = COM_ParseFile( *delta_script, token );
if( Q_strcmp( token, "," ))
{
Con_DPrintf( S_ERROR "Delta_ParseField: expected ',', found '%s' instead\n", token );
return false;
}
// copy base info to new field
pField->name = pFieldInfo->name;
pField->offset = pFieldInfo->offset;
pField->size = pFieldInfo->size;
pField->flags = 0;
// read delta-flags
while(( *delta_script = COM_ParseFile( *delta_script, token )) != NULL )
{
if( !Q_strcmp( token, "," ))
break; // end of flags argument
if( !Q_strcmp( token, "|" ))
continue;
if( !Q_strcmp( token, "DT_BYTE" ))
pField->flags |= DT_BYTE;
else if( !Q_strcmp( token, "DT_SHORT" ))
pField->flags |= DT_SHORT;
else if( !Q_strcmp( token, "DT_FLOAT" ))
pField->flags |= DT_FLOAT;
else if( !Q_strcmp( token, "DT_INTEGER" ))
pField->flags |= DT_INTEGER;
else if( !Q_strcmp( token, "DT_ANGLE" ))
pField->flags |= DT_ANGLE;
else if( !Q_strcmp( token, "DT_TIMEWINDOW_8" ))
pField->flags |= DT_TIMEWINDOW_8;
else if( !Q_strcmp( token, "DT_TIMEWINDOW_BIG" ))
pField->flags |= DT_TIMEWINDOW_BIG;
else if( !Q_strcmp( token, "DT_STRING" ))
pField->flags |= DT_STRING;
else if( !Q_strcmp( token, "DT_SIGNED" ))
pField->flags |= DT_SIGNED;
}
if( Q_strcmp( token, "," ))
{
Con_DPrintf( S_ERROR "Delta_ParseField: expected ',', found '%s' instead\n", token );
return false;
}
// read delta-bits
if(( *delta_script = COM_ParseFile( *delta_script, token )) == NULL )
{
Con_DPrintf( S_ERROR "Delta_ReadField: %s field bits argument is missing\n", pField->name );
return false;
}
pField->bits = Q_atoi( token );
*delta_script = COM_ParseFile( *delta_script, token );
if( Q_strcmp( token, "," ))
{
Con_DPrintf( S_ERROR "Delta_ReadField: expected ',', found '%s' instead\n", token );
return false;
}
// read delta-multiplier
if(( *delta_script = COM_ParseFile( *delta_script, token )) == NULL )
{
Con_DPrintf( S_ERROR "Delta_ReadField: %s missing 'multiplier' argument\n", pField->name );
return false;
}
pField->multiplier = Q_atof( token );
if( bPost )
{
*delta_script = COM_ParseFile( *delta_script, token );
if( Q_strcmp( token, "," ))
{
Con_DPrintf( S_ERROR "Delta_ReadField: expected ',', found '%s' instead\n", token );
return false;
}
// read delta-postmultiplier
if(( *delta_script = COM_ParseFile( *delta_script, token )) == NULL )
{
Con_DPrintf( S_ERROR "Delta_ReadField: %s missing 'post_multiply' argument\n", pField->name );
return false;
}
pField->post_multiplier = Q_atof( token );
}
else
{
// to avoid division by zero
pField->post_multiplier = 1.0f;
}
// closing brace...
*delta_script = COM_ParseFile( *delta_script, token );
if( Q_strcmp( token, ")" ))
{
Con_DPrintf( S_ERROR "Delta_ParseField: expected ')', found '%s' instead\n", token );
return false;
}
// ... and trying to parse optional ',' post-symbol
oldpos = *delta_script;
*delta_script = COM_ParseFile( *delta_script, token );
if( token[0] != ',' ) *delta_script = oldpos; // not a ','
return true;
}
void Delta_ParseTable( char **delta_script, delta_info_t *dt, const char *encodeDll, const char *encodeFunc )
{
string token;
delta_t *pField;
const delta_field_t *pInfo;
// allocate the delta-structures
if( !dt->pFields ) dt->pFields = (delta_t *)Z_Calloc( dt->maxFields * sizeof( delta_t ));
pField = dt->pFields;
pInfo = dt->pInfo;
dt->numFields = 0;
// assume we have handled '{'
while(( *delta_script = COM_ParseFile( *delta_script, token )) != NULL )
{
Assert( dt->numFields <= dt->maxFields );
if( !Q_strcmp( token, "DEFINE_DELTA" ))
{
if( Delta_ParseField( delta_script, pInfo, &pField[dt->numFields], false ))
dt->numFields++;
}
else if( !Q_strcmp( token, "DEFINE_DELTA_POST" ))
{
if( Delta_ParseField( delta_script, pInfo, &pField[dt->numFields], true ))
dt->numFields++;
}
else if( token[0] == '}' )
{
// end of the section
break;
}
}
// copy function name
Q_strncpy( dt->funcName, encodeFunc, sizeof( dt->funcName ));
if( !Q_stricmp( encodeDll, "none" ))
dt->customEncode = CUSTOM_NONE;
else if( !Q_stricmp( encodeDll, "gamedll" ))
dt->customEncode = CUSTOM_SERVER_ENCODE;
else if( !Q_stricmp( encodeDll, "clientdll" ))
dt->customEncode = CUSTOM_CLIENT_ENCODE;
// adjust to fit memory size
if( dt->numFields < dt->maxFields )
{
dt->pFields = Z_Realloc( dt->pFields, dt->numFields * sizeof( delta_t ));
}
dt->bInitialized = true; // table is ok
}
void Delta_InitFields( void )
{
byte *afile;
char *pfile;
string encodeDll, encodeFunc, token;
delta_info_t *dt;
afile = FS_LoadFile( DELTA_PATH, NULL, false );
if( !afile ) Sys_Error( "DELTA_Load: couldn't load file %s\n", DELTA_PATH );
pfile = (char *)afile;
while(( pfile = COM_ParseFile( pfile, token )) != NULL )
{
dt = Delta_FindStruct( token );
if( dt == NULL )
{
Sys_Error( "%s: unknown struct %s\n", DELTA_PATH, 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( "%s: missing '{' in section %s\n", DELTA_PATH, dt->pName );
}
Delta_ParseTable( &pfile, dt, encodeDll, encodeFunc );
}
Mem_Free( afile );
}
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( FBitSet( host.features, ENGINE_WRITE_LARGE_COORD ))
Delta_AddField( "movevars_t", "zmax", DT_FLOAT|DT_SIGNED, 18, 1.0f, 1.0f );
else Delta_AddField( "movevars_t", "zmax", DT_FLOAT|DT_SIGNED, 16, 1.0f, 1.0f );
Delta_AddField( "movevars_t", "waveHeight", DT_FLOAT|DT_SIGNED, 16, 16.0f, 1.0f );
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, 16, 1.0f, 1.0f ); // 0 - 264
Delta_AddField( "movevars_t", "skycolor_g", DT_FLOAT|DT_SIGNED, 16, 1.0f, 1.0f );
Delta_AddField( "movevars_t", "skycolor_b", DT_FLOAT|DT_SIGNED, 16, 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", "wateralpha", DT_FLOAT|DT_SIGNED, 16, 32.0f, 1.0f );
Delta_AddField( "movevars_t", "fog_settings", DT_INTEGER, 32, 1.0f, 1.0f );
dt->numFields = NUM_FIELDS( pm_fields ) - 4;
// now done
dt->bInitialized = true;
}
void Delta_InitClient( void )
{
int i, numActive = 0;
// already initalized
if( delta_init ) return;
for( i = 0; i < NUM_FIELDS( dt_info ); i++ )
{
if( dt_info[i].numFields > 0 )
{
dt_info[i].bInitialized = true;
numActive++;
}
}
if( numActive ) delta_init = true;
}
void Delta_Shutdown( void )
{
int i;
if( !delta_init ) return;
for( i = 0; i < NUM_FIELDS( dt_info ); i++ )
{
dt_info[i].numFields = 0;
dt_info[i].customEncode = CUSTOM_NONE;
dt_info[i].userCallback = NULL;
dt_info[i].funcName[0] = '\0';
if( dt_info[i].pFields )
{
Z_Free( dt_info[i].pFields );
dt_info[i].pFields = NULL;
}
dt_info[i].bInitialized = false;
}
delta_init = false;
}
/*
=====================
Delta_ClampIntegerField
prevent data to out of range
=====================
*/
int Delta_ClampIntegerField( delta_t *pField, int iValue, qboolean bSigned, int numbits )
{
#ifdef _DEBUG
if( numbits < 32 && abs( iValue ) >= (uint)BIT( numbits ))
Con_Reportf( "%s %d overflow %d\n", pField->name, abs( iValue ), (uint)BIT( numbits ));
#endif
if( numbits < 32 )
{
int signbits = bSigned ? (numbits - 1) : numbits;
int maxnum = BIT( signbits ) - 1;
int minnum = bSigned ? -maxnum : 0;
iValue = bound( minnum, iValue, maxnum );
}
return iValue; // clamped;
}
/*
=====================
Delta_CompareField
compare fields by offsets
assume from and to is valid
=====================
*/
qboolean Delta_CompareField( delta_t *pField, void *from, void *to, float timebase )
{
qboolean bSigned = ( pField->flags & DT_SIGNED ) ? true : false;
float val_a, val_b;
int fromF, toF;
Assert( pField != NULL );
Assert( from != NULL );
Assert( to != NULL );
if( pField->bInactive )
return true;
fromF = toF = 0;
if( pField->flags & DT_BYTE )
{
if( pField->flags & DT_SIGNED )
{
fromF = *(signed char *)((byte *)from + pField->offset );
toF = *(signed char *)((byte *)to + pField->offset );
}
else
{
fromF = *(byte *)((byte *)from + pField->offset );
toF = *(byte *)((byte *)to + pField->offset );
}
fromF = Delta_ClampIntegerField( pField, fromF, bSigned, pField->bits );
toF = Delta_ClampIntegerField( pField, toF, bSigned, pField->bits );
if( pField->multiplier != 1.0f ) fromF *= pField->multiplier;
if( pField->multiplier != 1.0f ) toF *= pField->multiplier;
}
else if( pField->flags & DT_SHORT )
{
if( pField->flags & DT_SIGNED )
{
fromF = *(short *)((byte *)from + pField->offset );
toF = *(short *)((byte *)to + pField->offset );
}
else
{
fromF = *(word *)((byte *)from + pField->offset );
toF = *(word *)((byte *)to + pField->offset );
}
fromF = Delta_ClampIntegerField( pField, fromF, bSigned, pField->bits );
toF = Delta_ClampIntegerField( pField, toF, bSigned, pField->bits );
if( pField->multiplier != 1.0f ) fromF *= pField->multiplier;
if( pField->multiplier != 1.0f ) toF *= pField->multiplier;
}
else if( pField->flags & DT_INTEGER )
{
#if defined __GNUC__ && __GNUC_MAJOR < 9 && !defined __clang__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wduplicated-branches"
#endif
if( pField->flags & DT_SIGNED )
{
fromF = *(int *)((byte *)from + pField->offset );
toF = *(int *)((byte *)to + pField->offset );
}
else
{
fromF = *(uint *)((byte *)from + pField->offset );
toF = *(uint *)((byte *)to + pField->offset );
}
#if defined __GNUC__ && __GNUC_MAJOR < 9 && !defined __clang__
#pragma GCC diagnostic pop
#endif
fromF = Delta_ClampIntegerField( pField, fromF, bSigned, pField->bits );
toF = Delta_ClampIntegerField( pField, toF, bSigned, pField->bits );
if( pField->multiplier != 1.0f ) fromF *= pField->multiplier;
if( pField->multiplier != 1.0f ) toF *= pField->multiplier;
}
else if( pField->flags & ( DT_ANGLE|DT_FLOAT ))
{
// don't convert floats to integers
fromF = *((int *)((byte *)from + pField->offset ));
toF = *((int *)((byte *)to + pField->offset ));
}
else if( pField->flags & DT_TIMEWINDOW_8 )
{
val_a = Q_rint((*(float *)((byte *)from + pField->offset )) * 100.0f );
val_b = Q_rint((*(float *)((byte *)to + pField->offset )) * 100.0f );
val_a -= Q_rint(timebase * 100.0f);
val_b -= Q_rint(timebase * 100.0f);
fromF = *((int *)&val_a);
toF = *((int *)&val_b);
}
else if( pField->flags & DT_TIMEWINDOW_BIG )
{
val_a = (*(float *)((byte *)from + pField->offset ));
val_b = (*(float *)((byte *)to + pField->offset ));
if( pField->multiplier != 1.0f )
{
val_a *= pField->multiplier;
val_b *= pField->multiplier;
val_a = (timebase * pField->multiplier) - val_a;
val_b = (timebase * pField->multiplier) - val_b;
}
else
{
val_a = timebase - val_a;
val_b = timebase - val_b;
}
fromF = *((int *)&val_a);
toF = *((int *)&val_b);
}
else if( pField->flags & DT_STRING )
{
// compare strings
char *s1 = (char *)((byte *)from + pField->offset );
char *s2 = (char *)((byte *)to + pField->offset );
// 0 is equal, otherwise not equal
toF = Q_strcmp( s1, s2 );
}
return ( fromF == toF ) ? true : false;
}
/*
=====================
Delta_TestBaseline
compare baselines to find optimal
=====================
*/
int Delta_TestBaseline( entity_state_t *from, entity_state_t *to, qboolean player, float timebase )
{
delta_info_t *dt = NULL;
delta_t *pField;
int i, countBits;
int numChanges = 0;
countBits = MAX_ENTITY_BITS + 2;
if( to == NULL )
{
if( from == NULL ) return 0;
return countBits;
}
if( FBitSet( to->entityType, ENTITY_BEAM ))
dt = Delta_FindStruct( "custom_entity_state_t" );
else if( player )
dt = Delta_FindStruct( "entity_state_player_t" );
else dt = Delta_FindStruct( "entity_state_t" );
Assert( dt && dt->bInitialized );
countBits++; // entityType flag
pField = dt->pFields;
Assert( pField != NULL );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
// flag about field change (sets always)
countBits++;
if( !Delta_CompareField( pField, from, to, timebase ))
{
// strings are handled difference
if( FBitSet( pField->flags, DT_STRING ))
countBits += Q_strlen((char *)((byte *)to + pField->offset )) * 8;
else countBits += pField->bits;
}
}
// g-cont. compare bitcount directly no reason to call BitByte here
return countBits;
}
/*
=====================
Delta_WriteField
write fields by offsets
assume from and to is valid
=====================
*/
qboolean Delta_WriteField( sizebuf_t *msg, delta_t *pField, void *from, void *to, float timebase )
{
qboolean bSigned = ( pField->flags & DT_SIGNED ) ? true : false;
float flValue, flAngle, flTime;
uint iValue;
const char *pStr;
if( Delta_CompareField( pField, from, to, timebase ))
{
MSG_WriteOneBit( msg, 0 ); // unchanged
return false;
}
MSG_WriteOneBit( msg, 1 ); // changed
if( pField->flags & DT_BYTE )
{
iValue = *(byte *)((byte *)to + pField->offset );
iValue = Delta_ClampIntegerField( pField, iValue, bSigned, pField->bits );
if( pField->multiplier != 1.0f ) iValue *= pField->multiplier;
MSG_WriteBitLong( msg, iValue, pField->bits, bSigned );
}
else if( pField->flags & DT_SHORT )
{
iValue = *(word *)((byte *)to + pField->offset );
iValue = Delta_ClampIntegerField( pField, iValue, bSigned, pField->bits );
if( pField->multiplier != 1.0f ) iValue *= pField->multiplier;
MSG_WriteBitLong( msg, iValue, pField->bits, bSigned );
}
else if( pField->flags & DT_INTEGER )
{
iValue = *(uint *)((byte *)to + pField->offset );
iValue = Delta_ClampIntegerField( pField, iValue, bSigned, pField->bits );
if( pField->multiplier != 1.0f ) iValue *= pField->multiplier;
MSG_WriteBitLong( msg, iValue, pField->bits, bSigned );
}
else if( pField->flags & DT_FLOAT )
{
flValue = *(float *)((byte *)to + pField->offset );
iValue = (int)(flValue * pField->multiplier);
iValue = Delta_ClampIntegerField( pField, iValue, bSigned, pField->bits );
MSG_WriteBitLong( msg, iValue, pField->bits, bSigned );
}
else if( pField->flags & DT_ANGLE )
{
flAngle = *(float *)((byte *)to + pField->offset );
// NOTE: never applies multipliers to angle because
// result may be wrong on client-side
MSG_WriteBitAngle( msg, flAngle, pField->bits );
}
else if( pField->flags & DT_TIMEWINDOW_8 )
{
flValue = *(float *)((byte *)to + pField->offset );
flTime = Q_rint( timebase * 100.0f ) - Q_rint( flValue * 100.0f );
iValue = (uint)abs( flTime );
iValue = Delta_ClampIntegerField( pField, iValue, bSigned, pField->bits );
MSG_WriteBitLong( msg, iValue, pField->bits, bSigned );
}
else if( pField->flags & DT_TIMEWINDOW_BIG )
{
flValue = *(float *)((byte *)to + pField->offset );
flTime = Q_rint( timebase * pField->multiplier ) - Q_rint( flValue * pField->multiplier );
iValue = (uint)abs( flTime );
iValue = Delta_ClampIntegerField( pField, iValue, bSigned, pField->bits );
MSG_WriteBitLong( msg, iValue, pField->bits, bSigned );
}
else if( pField->flags & DT_STRING )
{
pStr = (char *)((byte *)to + pField->offset );
MSG_WriteString( msg, pStr );
}
return true;
}
/*
=====================
Delta_ReadField
read fields by offsets
assume 'from' and 'to' is valid
=====================
*/
qboolean Delta_ReadField( sizebuf_t *msg, delta_t *pField, void *from, void *to, float timebase )
{
qboolean bSigned = ( pField->flags & DT_SIGNED ) ? true : false;
float flValue, flAngle, flTime;
qboolean bChanged;
uint iValue;
const char *pStr;
char *pOut;
bChanged = MSG_ReadOneBit( msg );
Assert( pField->multiplier != 0.0f );
if( pField->flags & DT_BYTE )
{
if( bChanged )
{
iValue = MSG_ReadBitLong( msg, pField->bits, bSigned );
if( pField->multiplier != 1.0f ) iValue /= pField->multiplier;
}
else
{
iValue = *(byte *)((byte *)from + pField->offset );
}
*(byte *)((byte *)to + pField->offset ) = iValue;
}
else if( pField->flags & DT_SHORT )
{
if( bChanged )
{
iValue = MSG_ReadBitLong( msg, pField->bits, bSigned );
if( pField->multiplier != 1.0f ) iValue /= pField->multiplier;
}
else
{
iValue = *(word *)((byte *)from + pField->offset );
}
*(word *)((byte *)to + pField->offset ) = iValue;
}
else if( pField->flags & DT_INTEGER )
{
if( bChanged )
{
iValue = MSG_ReadBitLong( msg, pField->bits, bSigned );
if( pField->multiplier != 1.0f ) iValue /= pField->multiplier;
}
else
{
iValue = *(uint *)((byte *)from + pField->offset );
}
*(uint *)((byte *)to + pField->offset ) = iValue;
}
else if( pField->flags & DT_FLOAT )
{
if( bChanged )
{
iValue = MSG_ReadBitLong( msg, pField->bits, bSigned );
flValue = (int)iValue * ( 1.0f / pField->multiplier );
flValue = flValue * pField->post_multiplier;
}
else
{
flValue = *(float *)((byte *)from + pField->offset );
}
*(float *)((byte *)to + pField->offset ) = flValue;
}
else if( pField->flags & DT_ANGLE )
{
if( bChanged )
{
flAngle = MSG_ReadBitAngle( msg, pField->bits );
}
else
{
flAngle = *(float *)((byte *)from + pField->offset );
}
*(float *)((byte *)to + pField->offset ) = flAngle;
}
else if( pField->flags & DT_TIMEWINDOW_8 )
{
if( bChanged )
{
iValue = MSG_ReadBitLong( msg, pField->bits, bSigned );
flValue = (float)((int)(iValue * 0.01f ));
flTime = timebase + flValue;
}
else
{
flTime = *(float *)((byte *)from + pField->offset );
}
*(float *)((byte *)to + pField->offset ) = flTime;
}
else if( pField->flags & DT_TIMEWINDOW_BIG )
{
if( bChanged )
{
iValue = MSG_ReadBitLong( msg, pField->bits, bSigned );
flValue = (float)((int)iValue) * ( 1.0f / pField->multiplier );
flTime = timebase + flValue;
}
else
{
flTime = *(float *)((byte *)from + pField->offset );
}
*(float *)((byte *)to + pField->offset ) = flTime;
}
else if( pField->flags & DT_STRING )
{
if( bChanged )
{
pStr = MSG_ReadString( msg );
}
else
{
pStr = (char *)((byte *)from + pField->offset );
}
pOut = (char *)((byte *)to + pField->offset );
Q_strncpy( pOut, pStr, pField->size );
}
return bChanged;
}
/*
=============================================================================
usercmd_t communication
=============================================================================
*/
/*
=====================
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" );
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
// 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_ReadDeltaUsercmd
=====================
*/
void MSG_ReadDeltaUsercmd( sizebuf_t *msg, usercmd_t *from, usercmd_t *to )
{
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "usercmd_t" );
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, 0.0f );
}
COM_NormalizeAngles( to->viewangles );
}
/*
============================================================================
event_args_t communication
============================================================================
*/
/*
=====================
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 != NULL );
// 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_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" );
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, 0.0f );
}
}
/*
=============================================================================
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 != NULL );
startBit = msg->iCurBit;
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
MSG_BeginServerCmd( 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 )
{
MSG_SeekToBit( msg, startBit, SEEK_SET );
return false;
}
return true;
}
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 != NULL );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, 0.0f );
}
}
/*
=============================================================================
clientdata_t communication
=============================================================================
*/
/*
==================
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, startBit;
int numChanges = 0;
dt = Delta_FindStruct( "clientdata_t" );
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
startBit = msg->iCurBit;
MSG_WriteOneBit( msg, 1 ); // have clientdata
// 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( numChanges ) return; // we have updates
MSG_SeekToBit( msg, startBit, SEEK_SET );
MSG_WriteOneBit( msg, 0 ); // no changes
}
/*
==================
MSG_ReadClientData
Read the clientdata
==================
*/
void MSG_ReadClientData( sizebuf_t *msg, clientdata_t *from, clientdata_t *to, float timebase )
{
#if !XASH_DEDICATED
delta_t *pField;
delta_info_t *dt;
int i;
dt = Delta_FindStruct( "clientdata_t" );
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
*to = *from;
if( !cls.legacymode && !MSG_ReadOneBit( msg ))
return; // we have no changes
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, timebase );
}
#endif
}
/*
=============================================================================
weapon_data_t communication
=============================================================================
*/
/*
==================
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" );
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
startBit = msg->iCurBit;
MSG_WriteOneBit( msg, 1 );
MSG_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 ) MSG_SeekToBit( msg, startBit, SEEK_SET );
}
/*
==================
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 != NULL );
*to = *from;
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, timebase );
}
}
/*
=============================================================================
entity_state_t communication
=============================================================================
*/
/*
==================
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, int delta_type, float timebase, int baseline )
{
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
MSG_WriteUBitLong( msg, from->number, MAX_ENTITY_BITS );
// 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;
MSG_WriteUBitLong( msg, fRemoveType, 2 );
return;
}
startBit = msg->iCurBit;
if( to->number < 0 || to->number >= GI->max_edicts )
Host_Error( "MSG_WriteDeltaEntity: Bad entity number: %i\n", to->number );
MSG_WriteUBitLong( msg, to->number, MAX_ENTITY_BITS );
MSG_WriteUBitLong( msg, 0, 2 ); // alive
if( baseline != 0 )
{
MSG_WriteOneBit( msg, 1 );
MSG_WriteSBitLong( msg, baseline, 7 );
}
else MSG_WriteOneBit( msg, 0 );
if( force || ( to->entityType != from->entityType ))
{
MSG_WriteOneBit( msg, 1 );
MSG_WriteUBitLong( msg, to->entityType, 2 );
numChanges++;
}
else MSG_WriteOneBit( msg, 0 );
if( FBitSet( to->entityType, ENTITY_BEAM ))
{
dt = Delta_FindStruct( "custom_entity_state_t" );
}
else if( delta_type == DELTA_PLAYER )
{
dt = Delta_FindStruct( "entity_state_player_t" );
}
else
{
dt = Delta_FindStruct( "entity_state_t" );
}
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
if( delta_type == DELTA_STATIC )
{
// static entities won't to be custom encoded
for( i = 0; i < dt->numFields; i++ )
dt->pFields[i].bInactive = false;
}
else
{
// 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 ) MSG_SeekToBit( msg, startBit, SEEK_SET );
}
/*
==================
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, int delta_type, float timebase )
{
#if !XASH_DEDICATED
delta_info_t *dt = NULL;
delta_t *pField;
int i, fRemoveType;
int baseline_offset = 0;
if( number < 0 || number >= clgame.maxEntities )
Host_Error( "MSG_ReadDeltaEntity: bad delta entity number: %i\n", number );
fRemoveType = MSG_ReadUBitLong( msg, 2 );
if( fRemoveType )
{
// check for a remove
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( !cls.legacymode )
{
if( MSG_ReadOneBit( msg ))
baseline_offset = MSG_ReadSBitLong( msg, 7 );
if( baseline_offset != 0 )
{
if( delta_type == DELTA_STATIC )
{
int backup = Q_max( 0, clgame.numStatics - abs( baseline_offset ));
from = &clgame.static_entities[backup].baseline;
}
else if( baseline_offset > 0 )
{
int backup = cls.next_client_entities - baseline_offset;
from = &cls.packet_entities[backup % cls.num_client_entities];
}
else
{
baseline_offset = abs( baseline_offset );
if( baseline_offset < cl.instanced_baseline_count )
from = &cl.instanced_baseline[baseline_offset];
}
}
}
// g-cont. probably is redundant
*to = *from;
if( MSG_ReadOneBit( msg ))
to->entityType = MSG_ReadUBitLong( msg, 2 );
to->number = number;
if( cls.legacymode ? ( to->entityType == ENTITY_BEAM ) : FBitSet( to->entityType, ENTITY_BEAM ))
{
dt = Delta_FindStruct( "custom_entity_state_t" );
}
else if( delta_type == DELTA_PLAYER )
{
dt = Delta_FindStruct( "entity_state_player_t" );
}
else
{
dt = Delta_FindStruct( "entity_state_t" );
}
Assert( dt && dt->bInitialized );
pField = dt->pFields;
Assert( pField != NULL );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
Delta_ReadField( msg, pField, from, to, timebase );
}
#endif // XASH_DEDICATED
// message parsed
return true;
}
/*
=============================================================================
game.dll interface
=============================================================================
*/
void GAME_EXPORT Delta_AddEncoder( char *name, pfnDeltaEncode encodeFunc )
{
delta_info_t *dt;
dt = Delta_FindStructByEncoder( name );
if( !dt || !dt->bInitialized )
{
Con_DPrintf( S_ERROR "Delta_AddEncoder: couldn't find delta with specified custom encode %s\n", name );
return;
}
if( dt->customEncode == CUSTOM_NONE )
{
Con_DPrintf( S_ERROR "Delta_AddEncoder: %s not supposed for custom encoding\n", dt->pName );
return;
}
// register new encode func
dt->userCallback = encodeFunc;
}
int GAME_EXPORT Delta_FindField( delta_t *pFields, const char *fieldname )
{
delta_info_t *dt;
delta_t *pField;
int i;
dt = Delta_FindStructByDelta( pFields );
if( dt == NULL || !fieldname || !fieldname[0] )
return -1;
for( i = 0, pField = dt->pFields; i < dt->numFields; i++, pField++ )
{
if( !Q_strcmp( pField->name, fieldname ))
return i;
}
return -1;
}
void GAME_EXPORT Delta_SetField( delta_t *pFields, const char *fieldname )
{
delta_info_t *dt;
delta_t *pField;
int i;
dt = Delta_FindStructByDelta( pFields );
if( dt == NULL || !fieldname || !fieldname[0] )
return;
for( i = 0, pField = dt->pFields; i < dt->numFields; i++, pField++ )
{
if( !Q_strcmp( pField->name, fieldname ))
{
pField->bInactive = false;
return;
}
}
}
void GAME_EXPORT Delta_UnsetField( delta_t *pFields, const char *fieldname )
{
delta_info_t *dt;
delta_t *pField;
int i;
dt = Delta_FindStructByDelta( pFields );
if( dt == NULL || !fieldname || !fieldname[0] )
return;
for( i = 0, pField = dt->pFields; i < dt->numFields; i++, pField++ )
{
if( !Q_strcmp( pField->name, fieldname ))
{
pField->bInactive = true;
return;
}
}
}
void GAME_EXPORT Delta_SetFieldByIndex( delta_t *pFields, int fieldNumber )
{
delta_info_t *dt;
dt = Delta_FindStructByDelta( pFields );
if( dt == NULL || fieldNumber < 0 || fieldNumber >= dt->numFields )
return;
dt->pFields[fieldNumber].bInactive = false;
}
void GAME_EXPORT Delta_UnsetFieldByIndex( delta_t *pFields, int fieldNumber )
{
delta_info_t *dt;
dt = Delta_FindStructByDelta( pFields );
if( dt == NULL || fieldNumber < 0 || fieldNumber >= dt->numFields )
return;
dt->pFields[fieldNumber].bInactive = true;
}
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