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Convert runway parser and all internals to metric units and 2 runway ends.

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This eliminates many conversations between ft and m and gives us runway start/end
points that are needed for many calculations. Also, this prepares the internals for
the upcoming apt.dat 850+ format that uses the metric system as well as start/end points.
This commit is contained in:
Christian Schmitt 2013-02-21 22:47:01 +01:00
parent d9026d776c
commit 715c48e2d7
7 changed files with 44 additions and 47 deletions
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4
src/Airports/airport.cxx
View file

@ -478,8 +478,8 @@ void FGAirport::processThreshold(SGPropertyNode* aThreshold)
SGGeod newThreshold(SGGeod::fromDegM(lon, lat, mPosition.getElevationM()));
double newHeading = aThreshold->getDoubleValue("hdg-deg");
double newDisplacedThreshold = aThreshold->getDoubleValue("displ-m") * SG_METER_TO_FEET;
double newStopway = aThreshold->getDoubleValue("stopw-m") * SG_METER_TO_FEET;
double newDisplacedThreshold = aThreshold->getDoubleValue("displ-m");
double newStopway = aThreshold->getDoubleValue("stopw-m");
cache->updateRunwayThreshold(id, newThreshold,
newHeading, newDisplacedThreshold, newStopway);

49
src/Airports/apt_loader.cxx
View file

@ -287,16 +287,21 @@ private:
double heading = atof( token[4].c_str() );
double length = atoi( token[5].c_str() );
double width = atoi( token[8].c_str() );
length *= SG_FEET_TO_METER;
width *= SG_FEET_TO_METER;
// adjust lat / lon to the start of the runway/taxiway, not the middle
SGGeod pos_1 = SGGeodesy::direct( SGGeod::fromDegFt(lon, lat, last_apt_elev), heading, -length/2 );
last_rwy_heading = heading;
int surface_code = atoi( token[10].c_str() );
SGGeod pos(SGGeod::fromDegFt(lon, lat, last_apt_elev));
if (rwy_no[0] == 'x') { // Taxiway
cache->insertRunway(FGPositioned::TAXIWAY, rwy_no, pos, currentAirportID,
cache->insertRunway(FGPositioned::TAXIWAY, rwy_no, pos_1, currentAirportID,
heading, length, width, 0.0, 0.0, surface_code);
} else if (rwy_no[0] == 'H') { // Helipad
SGGeod pos(SGGeod::fromDegFt(lon, lat, last_apt_elev));
cache->insertRunway(FGPositioned::HELIPAD, rwy_no, pos, currentAirportID,
heading, length, width, 0.0, 0.0, surface_code);
} else {
@ -306,22 +311,29 @@ private:
= simgear::strutils::split( rwy_displ_threshold, "." );
double displ_thresh1 = atof( displ[0].c_str() );
double displ_thresh2 = atof( displ[1].c_str() );
displ_thresh1 *= SG_FEET_TO_METER;
displ_thresh2 *= SG_FEET_TO_METER;
string rwy_stopway = token[7];
vector<string> stop
= simgear::strutils::split( rwy_stopway, "." );
double stopway1 = atof( stop[0].c_str() );
double stopway2 = atof( stop[1].c_str() );
stopway1 *= SG_FEET_TO_METER;
stopway2 *= SG_FEET_TO_METER;
PositionedID rwy = cache->insertRunway(FGPositioned::RUNWAY, rwy_no, pos,
SGGeod pos_2 = SGGeodesy::direct( pos_1, heading, length );
PositionedID rwy = cache->insertRunway(FGPositioned::RUNWAY, rwy_no, pos_1,
currentAirportID, heading, length,
width, displ_thresh1, stopway1,
surface_code);
PositionedID reciprocal = cache->insertRunway(FGPositioned::RUNWAY,
FGRunway::reverseIdent(rwy_no), pos,
currentAirportID, heading + 180.0, length,
width, displ_thresh2, stopway2,
FGRunway::reverseIdent(rwy_no), pos_2,
currentAirportID,
SGMiscd::normalizePeriodic(0, 360, heading + 180.0),
length, width, displ_thresh2, stopway2,
surface_code);
cache->setRunwayReciprocal(rwy, reciprocal);
@ -330,7 +342,7 @@ private:
void parseRunwayLine850(const vector<string>& token)
{
double width = atof( token[1].c_str() ) * SG_METER_TO_FEET;
double width = atof( token[1].c_str() );
int surface_code = atoi( token[2].c_str() );
double lat_1 = atof( token[9].c_str() );
@ -347,11 +359,8 @@ private:
rwy_lon_accum += lon_2;
rwy_count++;
double length, heading_1, heading_2, dummy;
double length, heading_1, heading_2;
SGGeodesy::inverse( pos_1, pos_2, heading_1, heading_2, length );
SGGeod pos;
SGGeodesy::direct( pos_1, heading_1, length / 2.0, pos, dummy );
length *= SG_METER_TO_FEET;
last_rwy_heading = heading_1;
@ -366,13 +375,13 @@ private:
double stopway1 = atof( token[12].c_str() );
double stopway2 = atof( token[21].c_str() );
PositionedID rwy = cache->insertRunway(FGPositioned::RUNWAY, rwy_no_1, pos,
PositionedID rwy = cache->insertRunway(FGPositioned::RUNWAY, rwy_no_1, pos_1,
currentAirportID, heading_1, length,
width, displ_thresh1, stopway1,
surface_code);
PositionedID reciprocal = cache->insertRunway(FGPositioned::RUNWAY,
rwy_no_2, pos,
rwy_no_2, pos_2,
currentAirportID, heading_2, length,
width, displ_thresh2, stopway2,
surface_code);
@ -382,7 +391,7 @@ private:
void parseWaterRunwayLine850(const vector<string>& token)
{
double width = atof( token[1].c_str() ) * SG_METER_TO_FEET;
double width = atof( token[1].c_str() );
double lat_1 = atof( token[4].c_str() );
double lon_1 = atof( token[5].c_str() );
@ -398,22 +407,20 @@ private:
rwy_lon_accum += lon_2;
rwy_count++;
double length, heading_1, heading_2, dummy;
double length, heading_1, heading_2;
SGGeodesy::inverse( pos_1, pos_2, heading_1, heading_2, length );
SGGeod pos;
SGGeodesy::direct( pos_1, heading_1, length / 2.0, pos, dummy );
last_rwy_heading = heading_1;
const string& rwy_no_1(token[3]);
const string& rwy_no_2(token[6]);
PositionedID rwy = cache->insertRunway(FGPositioned::RUNWAY, rwy_no_1, pos,
PositionedID rwy = cache->insertRunway(FGPositioned::RUNWAY, rwy_no_1, pos_1,
currentAirportID, heading_1, length,
width, 0.0, 0.0, 13);
PositionedID reciprocal = cache->insertRunway(FGPositioned::RUNWAY,
rwy_no_2, pos,
rwy_no_2, pos_2,
currentAirportID, heading_2, length,
width, 0.0, 0.0, 13);
@ -422,8 +429,8 @@ private:
void parseHelipadLine850(const vector<string>& token)
{
double length = atof( token[5].c_str() ) * SG_METER_TO_FEET;
double width = atof( token[6].c_str() ) * SG_METER_TO_FEET;
double length = atof( token[5].c_str() );
double width = atof( token[6].c_str() );
double lat = atof( token[2].c_str() );
double lon = atof( token[3].c_str() );

11
src/Airports/runwaybase.cxx
View file

@ -61,10 +61,7 @@ FGRunwayBase::FGRunwayBase(PositionedID aGuid, Type aTy, const string& aIdent,
SGGeod FGRunwayBase::pointOnCenterline(double aOffset) const
{
double halfLengthMetres = lengthM() * 0.5;
SGGeod result = SGGeodesy::direct(mPosition, _heading,
aOffset - halfLengthMetres);
SGGeod result = SGGeodesy::direct(mPosition, _heading, aOffset);
result.setElevationM(mPosition.getElevationM());
return result;
@ -75,13 +72,11 @@ SGGeod FGRunwayBase::pointOffCenterline(double aOffset, double lateralOffset) co
SGGeod result;
SGGeod temp;
double dummyAz2;
double halfLengthMetres = lengthM() * 0.5;
SGGeodesy::direct(mPosition, _heading,
aOffset - halfLengthMetres,
temp, dummyAz2);
aOffset, temp, dummyAz2);
SGGeodesy::direct(temp, (_heading+90.0),
SGGeodesy::direct(temp, SGMiscd::normalizePeriodic(0, 360,_heading+90.0),
lateralOffset,
result, dummyAz2);

8
src/Airports/runwaybase.hxx
View file

@ -54,16 +54,16 @@ public:
SGGeod pointOffCenterline(double aOffset, double lateralOffset) const;
double lengthFt() const
{ return _length; }
{ return _length * SG_METER_TO_FEET; }
double lengthM() const
{ return _length * SG_FEET_TO_METER; }
{ return _length; }
double widthFt() const
{ return _width; }
{ return _width * SG_METER_TO_FEET; }
double widthM() const
{ return _width * SG_FEET_TO_METER; }
{ return _width; }
/**
* Runway heading in degrees.

2
src/Airports/runways.cxx
View file

@ -121,7 +121,7 @@ SGGeod FGRunway::end() const
SGGeod FGRunway::threshold() const
{
return pointOnCenterline(_displ_thresh * SG_FEET_TO_METER);
return pointOnCenterline(_displ_thresh);
}
void FGRunway::setReciprocalRunway(PositionedID other)

4
src/Airports/runways.hxx
View file

@ -96,10 +96,10 @@ public:
SGGeod end() const;
double displacedThresholdM() const
{ return _displ_thresh * SG_FEET_TO_METER; }
{ return _displ_thresh; }
double stopwayM() const
{ return _stopway * SG_FEET_TO_METER; }
{ return _stopway; }
/**
* Airport this runway is located at

9
src/Navaids/NavDataCache.cxx
View file

@ -71,7 +71,7 @@ using std::string;
namespace {
const int MAX_RETRIES = 10;
const int SCHEMA_VERSION = 7;
const int SCHEMA_VERSION = 8;
const int CACHE_SIZE_KBYTES= 16000;
// bind a std::string to a sqlite statement. The std::string must live the
@ -1580,13 +1580,8 @@ void NavDataCache::updateRunwayThreshold(PositionedID runwayID, const SGGeod &aT
sqlite3_bind_double(d->updateRunwayThreshold, 4, aStopway);
d->execUpdate(d->updateRunwayThreshold);
// compute the new runway center, based on the threshold lat/lon and length,
double offsetFt = (0.5 * d->runwayLengthFt(runwayID));
SGGeod newCenter= SGGeodesy::direct(aThreshold, aHeading, offsetFt * SG_FEET_TO_METER);
newCenter.setElevationM(aThreshold.getElevationM());
// now update the positional data
updatePosition(runwayID, newCenter);
updatePosition(runwayID, aThreshold);
}
PositionedID