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Added a function to determine whether a point is on a given runway

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This commit is contained in:
daveluff 2003-03-11 13:25:14 +00:00
parent 0333c21bbf
commit 46261bb51b
2 changed files with 33 additions and 0 deletions
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23
src/ATC/ATCutils.cxx
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@ -30,6 +30,7 @@
#include <Main/globals.hxx>
#include "ATCutils.hxx"
#include "ATCProjection.hxx"
// Convert any number to spoken digits
string ConvertNumToSpokenDigits(string n) {
@ -280,3 +281,25 @@ double dclGetAirportElev( const string& id ) {
return -9999.0;
}
}
// Runway stuff
// Given a Point3D (lon/lat/elev) and an FGRunway struct, determine if the point lies on the runway
bool OnRunway(Point3D pt, FGRunway* rwy) {
FGATCAlignedProjection ortho;
Point3D centre(rwy->lon, rwy->lat, 0.0); // We don't need the elev
ortho.Init(centre, rwy->heading);
Point3D xyc = ortho.ConvertToLocal(centre);
Point3D xyp = ortho.ConvertToLocal(pt);
//cout << "Length offset = " << fabs(xyp.y() - xyc.y()) << '\n';
//cout << "Width offset = " << fabs(xyp.x() - xyc.x()) << '\n';
if((fabs(xyp.y() - xyc.y()) < ((rwy->length/2.0) + 5.0))
&& (fabs(xyp.x() - xyc.x()) < (rwy->width/2.0))) {
return(true);
}
return(false);
}

10
src/ATC/ATCutils.hxx
View file

@ -19,6 +19,7 @@
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include <Airports/simple.hxx>
#include <Airports/runways.hxx>
#include <math.h>
#include <simgear/math/point3d.hxx>
@ -91,3 +92,12 @@ bool dclFindAirportID( const string& id, FGAirport *a );
// get airport elevation
double dclGetAirportElev( const string& id );
/****************
*
* Runways
*
****************/
// Given a Point3D (lon/lat/elev) and an FGRunway struct, determine if the point lies on the runway
bool OnRunway(Point3D pt, FGRunway* rwy);