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Maik JUSTUS: add functions carttogeod() and geodtocart() to convert between

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x/y/z and lat/lon/alt                                      (OK'ed by Andy)
This commit is contained in:
mfranz 2007-06-16 18:22:20 +00:00
parent 0aab8f68f4
commit 58e0deb56b
1 changed files with 38 additions and 0 deletions
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38
src/Scripting/NasalSys.cxx
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@ -20,6 +20,7 @@
#include <simgear/misc/sg_path.hxx>
#include <simgear/misc/interpolator.hxx>
#include <simgear/structure/commands.hxx>
#include <simgear/math/sg_geodesy.hxx>
#include <Main/globals.hxx>
#include <Main/fg_props.hxx>
@ -373,6 +374,41 @@ static naRef f_systime(naContext c, naRef me, int argc, naRef* args)
}
// Convert a cartesian point to a geodetic lat/lon/altitude.
static naRef f_carttogeod(naContext c, naRef me, int argc, naRef* args)
{
double lat, lon, alt, xyz[3];
static const float RAD2DEG = 1./0.0174532925199;
if(argc != 3) naRuntimeError(c, "carttogeod() expects 3 arguments");
for(int i=0; i<3; i++)
xyz[i] = naNumValue(args[i]).num;
sgCartToGeod(xyz, &lat, &lon, &alt);
lat *= RAD2DEG;
lon *= RAD2DEG;
naRef vec = naNewVector(c);
naVec_append(vec, naNum(lat));
naVec_append(vec, naNum(lon));
naVec_append(vec, naNum(alt));
return vec;
}
// Convert a cartesian point to a geodetic lat/lon/altitude.
static naRef f_geodtocart(naContext c, naRef me, int argc, naRef* args)
{
static const float DEG2RAD = 0.0174532925199;
if(argc != 3) naRuntimeError(c, "geodtocart() expects 3 arguments");
double lat = naNumValue(args[0]).num * DEG2RAD;
double lon = naNumValue(args[1]).num * DEG2RAD;
double alt = naNumValue(args[2]).num * DEG2RAD;
double xyz[3];
sgGeodToCart(lat, lon, alt, xyz);
naRef vec = naNewVector(c);
naVec_append(vec, naNum(xyz[0]));
naVec_append(vec, naNum(xyz[1]));
naVec_append(vec, naNum(xyz[2]));
return vec;
}
// Table of extension functions. Terminate with zeros.
static struct { char* name; naCFunction func; } funcs[] = {
{ "getprop", f_getprop },
@ -388,6 +424,8 @@ static struct { char* name; naCFunction func; } funcs[] = {
{ "srand", f_srand },
{ "directory", f_directory },
{ "systime", f_systime },
{ "carttogeod", f_carttogeod },
{ "geodtocart", f_geodtocart },
{ 0, 0 }
};