fly/flightgear
1
0
Fork 0
Code Activity
flightgear/utils/TerraSync/terrasync.cxx

275 lines
7.3 KiB
C++
Raw Blame History

// terrasync.cxx -- "JIT" scenery fetcher
//
// Written by Curtis Olson, started November 2002.
//
// Copyright (C) 2002 Curtis L. Olson - http://www.flightgear.org/~curt
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
#include <stdlib.h> // atoi() atof() abs() system()
#include <simgear/compiler.h>
#include STL_IOSTREAM
#include STL_STRING
#include <plib/netSocket.h>
#include <plib/ul.h>
#include <simgear/bucket/newbucket.hxx>
SG_USING_STD(string);
SG_USING_STD(cout);
SG_USING_STD(endl);
static string server = "scenery.flightgear.org";
static string source_module = "Scenery-0.9.5";
static string source_base = server + (string)"::" + source_module;
static string dest_base = "/dest/scenery/dir";
// display usage
static void usage( const string& prog ) {
cout << "Usage: " << prog
<< " -p <port> [ -s <rsync_source> ] -d <rsync_dest>" << endl;
}
// parse message
static void parse_message( const string &msg, int *lat, int *lon ) {
double dlat, dlon;
string text = msg;
// find GGA string and advance to start of lat
string::size_type pos = text.find( "$GPGGA" );
string tmp = text.substr( pos + 7 );
pos = text.find( "," );
tmp = tmp.substr( pos + 1 );
// cout << "-> " << tmp << endl;
// find lat then advance to start of hemisphere
pos = tmp.find( "," );
string lats = tmp.substr( 0, pos );
dlat = atof( lats.c_str() ) / 100.0;
tmp = tmp.substr( pos + 1 );
// find N/S hemisphere and advance to start of lon
if ( tmp.substr( 0, 1 ) == "S" ) {
dlat = -dlat;
}
pos = tmp.find( "," );
tmp = tmp.substr( pos + 1 );
// find lon
pos = tmp.find( "," );
string lons = tmp.substr( 0, pos );
dlon = atof( lons.c_str() ) / 100.0;
tmp = tmp.substr( pos + 1 );
// find E/W hemisphere and advance to start of lon
if ( tmp.substr( 0, 1 ) == "W" ) {
dlon = -dlon;
}
if ( dlat < 0 ) {
*lat = (int)dlat - 1;
} else {
*lat = (int)dlat;
}
if ( dlon < 0 ) {
*lon = (int)dlon - 1;
} else {
*lon = (int)dlon;
}
}
// sync area
static void sync_area( int lat, int lon ) {
char NS, EW;
int baselat, baselon;
if ( lat < 0 ) {
int base = (int)(lat / 10);
if ( lat == base * 10 ) {
baselat = base * 10;
} else {
baselat = (base - 1) * 10;
}
NS = 's';
} else {
baselat = (int)(lat / 10) * 10;
NS = 'n';
}
if ( lon < 0 ) {
int base = (int)(lon / 10);
if ( lon == base * 10 ) {
baselon = base * 10;
} else {
baselon = (base - 1) * 10;
}
EW = 'w';
} else {
baselon = (int)(lon / 10) * 10;
EW = 'e';
}
char command[512];
// make container directory
char container_dir[512];
snprintf( container_dir, 512, "%s/%c%03d%c%02d",
dest_base.c_str(), EW, abs(baselon), NS, abs(baselat) );
snprintf( command, 512, "mkdir -p %s", container_dir );
cout << command << endl;
system( command );
char dir[512];
snprintf( dir, 512, "%c%03d%c%02d/%c%03d%c%02d",
EW, abs(baselon), NS, abs(baselat),
EW, abs(lon), NS, abs(lat) );
snprintf( command, 512,
"rsync --verbose --archive --delete --perms --owner --group %s/%s/ %s/%s",
source_base.c_str(), dir, dest_base.c_str(), dir );
cout << command << endl;
system( command );
}
// sync areas
static void sync_areas( int lat, int lon, int lat_dir, int lon_dir ) {
// do current 1x1 degree area first
sync_area( lat, lon );
if ( lat_dir == 0 && lon_dir == 0 ) {
// now do surrounding 8 1x1 degree areas.
for ( int i = lat - 1; i <= lat + 1; ++i ) {
for ( int j = lon - 1; j <= lon + 1; ++j ) {
if ( i != lat || j != lon ) {
sync_area( i, j );
}
}
}
} else {
if ( lat_dir != 0 ) {
sync_area( lat + lat_dir, lon );
sync_area( lat + lat_dir, lon - 1 );
sync_area( lat + lat_dir, lon + 1 );
}
if ( lon_dir != 0 ) {
sync_area( lat, lon + lon_dir );
sync_area( lat - 1, lon + lon_dir );
sync_area( lat + 1, lon + lon_dir );
}
}
}
int main( int argc, char **argv ) {
int port = 5501;
char host[256] = ""; // accept messages from anyone
// parse arguments
int i = 1;
while ( i < argc ) {
if ( (string)argv[i] == "-p" ) {
++i;
port = atoi( argv[i] );
} else if ( (string)argv[i] == "-s" ) {
++i;
source_base = argv[i];
} else if ( (string)argv[i] == "-d" ) {
++i;
dest_base = argv[i];
} else {
usage( argv[0] );
exit(-1);
}
++i;
}
// Must call this before any other net stuff
netInit( &argc,argv );
netSocket s;
if ( ! s.open( false ) ) { // open a UDP socket
printf("error opening socket\n");
return -1;
}
s.setBlocking( false );
if ( s.bind( host, port ) == -1 ) {
printf("error binding to port %d\n", port);
return -1;
}
char msg[256];
int maxlen = 256;
int len;
int lat, lon;
int last_lat = -9999;
int last_lon = -9999;
bool recv_msg = false;
while ( true ) {
recv_msg = false;
while ( (len = s.recv(msg, maxlen, 0)) >= 0 ) {
msg[len] = '\0';
recv_msg = true;
parse_message( msg, &lat, &lon );
cout << "pos = " << lat << "," << lon << endl;
}
if ( recv_msg ) {
if ( lat != last_lat || lon != last_lon ) {
int lat_dir, lon_dir, dist;
if ( last_lat == -9999 || last_lon == -9999 ) {
lat_dir = lon_dir = 0;
} else {
dist = lat - last_lat;
if ( dist != 0 ) {
lat_dir = dist / abs(dist);
} else {
lat_dir = 0;
}
dist = lon - last_lon;
if ( dist != 0 ) {
lon_dir = dist / abs(dist);
} else {
lon_dir = 0;
}
}
cout << "lat = " << lat << " lon = " << lon << endl;
cout << "lat_dir = " << lat_dir << " " << " lon_dir = " << lon_dir << endl;
sync_areas( lat, lon, lat_dir, lon_dir );
}
last_lat = lat;
last_lon = lon;
}
ulSleep( 1 );
}
return 0;
}
View git blame Copy permalink