fly/flightgear
1
0
Fork 0
Code Activity
flightgear/src/Navaids/awynet.cxx
Thomas Geymayer 4b573ebd13 Start porting NasalPositioned to cppbind. 
For now it is available in the positioned Nasal
module. FGAirport is fully ported, but especially
procedures/navaids and free functions are still
missing.
2013-03-04 19:24:47 +01:00

468 lines
12 KiB
C++
Raw Blame History

// awynet.cxx
// by Durk Talsma, started June 2005.
//
// Copyright (C) 2004 Durk Talsma.
//
// 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <math.h>
#include <algorithm>
#include <iostream>
#include <simgear/compiler.h>
#include <simgear/debug/logstream.hxx>
#include <simgear/misc/sgstream.hxx>
#include <simgear/route/waypoint.hxx>
#include <simgear/misc/sg_path.hxx>
#include "awynet.hxx"
using std::sort;
using std::string;
using std::cerr;
using std::endl;
/**************************************************************************
* FGNode
*************************************************************************/
FGNode::FGNode()
{
}
FGNode::FGNode(const SGGeod& aPos, int idx, std::string id) :
ident(id),
geod(aPos),
index(idx)
{
cart = SGVec3d::fromGeod(geod);
}
bool FGNode::matches(std::string id, const SGGeod& aPos)
{
if ((ident == id) &&
(fabs(aPos.getLatitudeDeg() - geod.getLatitudeDeg()) < 1.0) &&
(fabs(aPos.getLongitudeDeg() - geod.getLongitudeDeg()) < 1.0))
return true;
else
return false;
}
/***************************************************************************
* FGAirway
**************************************************************************/
FGAirway::FGAirway()
{
length = 0;
}
void FGAirway::setStart(node_map *nodes)
{
node_map_iterator itr = nodes->find(startNode);
if (itr == nodes->end()) {
cerr << "Couldn't find node: " << startNode << endl;
}
else {
start = itr->second->getAddress();
itr->second->addAirway(this);
}
}
void FGAirway::setEnd(node_map *nodes)
{
node_map_iterator itr = nodes->find(endNode);
if (itr == nodes->end()) {
cerr << "Couldn't find node: " << endNode << endl;
}
else {
end = itr->second->getAddress();
}
}
// There is probably a computationally cheaper way of
// doing this.
void FGAirway::setTrackDistance()
{
length = SGGeodesy::distanceM(start->getPosition(), end->getPosition());
}
/***************************************************************************
* FGAirRoute()
**************************************************************************/
bool FGAirRoute::next(int *val)
{
//for (intVecIterator i = nodes.begin(); i != nodes.end(); i++)
// cerr << "FGTaxiRoute contains : " << *(i) << endl;
//cerr << "Offset from end: " << nodes.end() - currNode << endl;
//if (currNode != nodes.end())
// cerr << "true" << endl;
//else
// cerr << "false" << endl;
if (currNode == nodes.end())
return false;
*val = *(currNode);
currNode++;
return true;
};
void FGAirRoute::add(const FGAirRoute &other) {
for (constIntVecIterator i = other.nodes.begin() ;
i != other.nodes.end(); i++)
{
nodes.push_back((*i));
}
distance += other.distance;
}
/***************************************************************************
* FGAirwayNetwork()
**************************************************************************/
FGAirwayNetwork::FGAirwayNetwork()
{
hasNetwork = false;
foundRoute = false;
totalDistance = 0;
maxDistance = 0;
}
FGAirwayNetwork::~FGAirwayNetwork()
{
for (unsigned int it = 0; it < nodes.size(); it++) {
delete nodes[ it];
}
}
void FGAirwayNetwork::addAirway(const FGAirway &seg)
{
segments.push_back(seg);
}
//void FGAirwayNetwork::addNode(const FGNode &node)
//{
// nodes.push_back(node);
//}
/*
void FGAirwayNetwork::addNodes(FGParkingList *parkings)
{
FGTaxiNode n;
FGParkingList::iterator i = parkings->begin();
while (i != parkings->end())
{
n.setIndex(i->getIndex());
n.setLatitude(i->getLatitude());
n.setLongitude(i->getLongitude());
nodes.push_back(n);
i++;
}
}
*/
void FGAirwayNetwork::init()
{
hasNetwork = true;
FGAirwayVectorIterator i = segments.begin();
while(i != segments.end()) {
//cerr << "initializing Airway " << i->getIndex() << endl;
i->setStart(&nodesMap);
i->setEnd (&nodesMap);
//i->setTrackDistance();
//cerr << "Track distance = " << i->getLength() << endl;
//cerr << "Track ends at" << i->getEnd()->getIndex() << endl;
i++;
}
//exit(1);
}
void FGAirwayNetwork::load(const SGPath& path)
{
std::string identStart, identEnd, token, name;
double latStart, lonStart, latEnd, lonEnd;
int type, base, top;
int airwayIndex = 0;
FGNode *n;
sg_gzifstream in( path.str() );
if ( !in.is_open() ) {
SG_LOG( SG_NAVAID, SG_ALERT, "Cannot open file: " << path.str() );
exit(-1);
}
// toss the first two lines of the file
in >> skipeol;
in >> skipeol;
// read in each remaining line of the file
while ( ! in.eof() ) {
string token;
in >> token;
if ( token == "99" ) {
return; //in >> skipeol;
}
// Read each line from the database
identStart = token;
in >> latStart >> lonStart >> identEnd >> latEnd >> lonEnd >> type >> base >> top >> name;
in >> skipeol;
/*out << identStart << " "
<< latStart << " "
<< lonStart << " "
<< identEnd << " "
<< latEnd << " "
<< lonEnd << " "
<< type << " "
<< base << " "
<< top << " "
<< name << " "
<< endl;*/
//first determine whether the start and end reference database already exist
//if not we should create them
int startIndex = 0, endIndex=0;
// FGNodeVectorIterator i = nodes.begin();
// while (i != nodes.end() && (!(i->matches(identStart,latStart, lonStart))))
// {
// i++;
// startIndex++;
// }
// if (i == nodes.end())
// {
// nodes.push_back(FGNode(latStart, lonStart, startIndex, identStart));
// //cout << "Adding node: " << identStart << endl;
// }
// i = nodes.begin();
// while (i != nodes.end() && (!(i->matches(identEnd,latEnd, lonEnd)))) {
// i++;
// endIndex++;
// }
// if (i == nodes.end()) {
// nodes.push_back(FGNode(latEnd, lonEnd, endIndex, identEnd));
// //cout << "Adding node: " << identEnd << endl;
// }
// generate unique IDs for the nodes, consisting of a combination
// of the Navaid identifier + the integer value of the lat/lon position.
// identifier alone will not suffice, because they might not be globally unique.
char buffer[32];
string startNode, endNode;
// Start
buffer[sizeof(buffer)-1] = 0;
snprintf(buffer, sizeof(buffer)-1, "%s%d%d", identStart.c_str(), (int) latStart, (int) lonStart);
startNode = buffer;
node_map_iterator itr = nodesMap.find(string(buffer));
if (itr == nodesMap.end()) {
startIndex = nodes.size();
SGGeod startPos(SGGeod::fromDeg(lonStart, latStart));
n = new FGNode(startPos, startIndex, identStart);
nodesMap[string(buffer)] = n;
nodes.push_back(n);
//cout << "Adding node: " << identStart << endl;
}
else {
startIndex = itr->second->getIndex();
}
// Start
snprintf(buffer, 32, "%s%d%d", identEnd.c_str(), (int) latEnd, (int) lonEnd);
endNode = buffer;
itr = nodesMap.find(string(buffer));
if (itr == nodesMap.end()) {
endIndex = nodes.size();
SGGeod endPos(SGGeod::fromDeg(lonEnd, latEnd));
n = new FGNode(endPos, endIndex, identEnd);
nodesMap[string(buffer)] = n;
nodes.push_back(n);
//cout << "Adding node: " << identEnd << endl;
}
else {
endIndex = itr->second->getIndex();
}
FGAirway airway;
airway.setIndex ( airwayIndex++ );
airway.setStartNodeRef ( startNode );
airway.setEndNodeRef ( endNode );
airway.setType ( type );
airway.setBase ( base );
airway.setTop ( top );
airway.setName ( name );
segments.push_back(airway);
//cout << " Adding Airway: " << name << " " << startIndex << " " << endIndex << endl;
}
}
int FGAirwayNetwork::findNearestNode(const SGGeod& aPos)
{
double minDist = HUGE_VAL;
int index = -1;
SGVec3d cart = SGVec3d::fromGeod(aPos);
//cerr << "Lat " << lat << " lon " << lon << endl;
for (FGNodeVectorIterator
itr = nodes.begin();
itr != nodes.end(); itr++)
{
double d2 = distSqr(cart, (*itr)->getCart());
if (d2 < minDist)
{
minDist = d2;
index = (*itr)->getIndex();
}
//cerr << (*itr)->getIndex() << endl;
}
//cerr << " returning " << index << endl;
return index;
}
FGNode *FGAirwayNetwork::findNode(int idx)
{
for (FGNodeVectorIterator
itr = nodes.begin();
itr != nodes.end(); itr++)
{
if ((*itr)->getIndex() == idx)
return (*itr)->getAddress();
}
return 0;
}
FGAirRoute FGAirwayNetwork::findShortestRoute(int start, int end)
{
foundRoute = false;
totalDistance = 0;
FGNode *firstNode = findNode(start);
//FGNode *lastNode = findNode(end);
//prevNode = prevPrevNode = -1;
//prevNode = start;
routes.clear();
traceStack.clear();
trace(firstNode, end, 0, 0);
FGAirRoute empty;
if (!foundRoute)
{
SG_LOG( SG_NAVAID, SG_INFO, "Failed to find route from waypoint " << start << " to " << end );
cerr << "Failed to find route from waypoint " << start << " to " << end << endl;
//exit(1);
}
sort(routes.begin(), routes.end());
//for (intVecIterator i = route.begin(); i != route.end(); i++)
// {
// rte->push_back(*i);
// }
if (routes.begin() != routes.end())
return *(routes.begin());
else
return empty;
}
void FGAirwayNetwork::trace(FGNode *currNode, int end, int depth, double distance)
{
traceStack.push_back(currNode->getIndex());
totalDistance += distance;
//cerr << depth << " ";
//cerr << "Starting trace " << depth << " total distance: " << totalDistance<< endl;
//<< currNode->getIndex() << endl;
// If the current route matches the required end point we found a valid route
// So we can add this to the routing table
if (currNode->getIndex() == end)
{
cerr << "Found route : " << totalDistance << "" << " " << *(traceStack.end()-1) << endl;
routes.push_back(FGAirRoute(traceStack,totalDistance));
traceStack.pop_back();
if (!(foundRoute))
maxDistance = totalDistance;
else
if (totalDistance < maxDistance)
maxDistance = totalDistance;
foundRoute = true;
totalDistance -= distance;
return;
}
// search if the currentNode has been encountered before
// if so, we should step back one level, because it is
// rather rediculous to proceed further from here.
// if the current node has not been encountered before,
// i should point to traceStack.end()-1; and we can continue
// if i is not traceStack.end, the previous node was found,
// and we should return.
// This only works at trace levels of 1 or higher though
if (depth > 0) {
intVecIterator i = traceStack.begin();
while ((*i) != currNode->getIndex()) {
//cerr << "Route so far : " << (*i) << endl;
i++;
}
if (i != traceStack.end()-1) {
traceStack.pop_back();
totalDistance -= distance;
return;
}
// If the total distance from start to the current waypoint
// is longer than that of a route we can also stop this trace
// and go back one level.
if ((totalDistance > maxDistance) && foundRoute)
{
cerr << "Stopping rediculously long trace: " << totalDistance << endl;
traceStack.pop_back();
totalDistance -= distance;
return;
}
}
//cerr << "2" << endl;
if (currNode->getBeginRoute() != currNode->getEndRoute())
{
//cerr << "l3l" << endl;
for (FGAirwayPointerVectorIterator
i = currNode->getBeginRoute();
i != currNode->getEndRoute();
i++)
{
//cerr << (*i)->getLenght() << endl;
trace((*i)->getEnd(), end, depth+1, (*i)->getLength());
// {
// // cerr << currNode -> getIndex() << " ";
// route.push_back(currNode->getIndex());
// return true;
// }
}
}
else
{
//SG_LOG( SG_NAVAID, SG_DEBUG, "4" );
//cerr << "4" << endl;
}
traceStack.pop_back();
totalDistance -= distance;
return;
}
View git blame Copy permalink