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/**
* \file geodesicdirect.cpp
* \brief Matlab mex file for geographic to UTM/UPS conversions
*
* Copyright (c) Charles Karney (2010-2013) <charles@karney.com> and licensed
* under the MIT/X11 License. For more information, see
* http://geographiclib.sourceforge.net/
**********************************************************************/
// Compile in Matlab with
// [Unix]
// mex -I/usr/local/include -L/usr/local/lib -Wl,-rpath=/usr/local/lib
// -lGeographic geodesicdirect.cpp
// [Windows]
// mex -I../include -L../windows/Release
// -lGeographic geodesicdirect.cpp
#include <algorithm>
#include <GeographicLib/Geodesic.hpp>
#include <GeographicLib/GeodesicExact.hpp>
#include <mex.h>
using namespace std;
using namespace GeographicLib;
template<class G> void
compute(double a, double f, mwSize m, const double* geodesic,
double* latlong, double* aux) {
const double* lat1 = geodesic;
const double* lon1 = geodesic + m;
const double* azi1 = geodesic + 2*m;
const double* s12 = geodesic + 3*m;
double* lat2 = latlong;
double* lon2 = latlong + m;
double* azi2 = latlong + 2*m;
double* a12 = NULL;
double* m12 = NULL;
double* M12 = NULL;
double* M21 = NULL;
double* S12 = NULL;
if (aux) {
a12 = aux;
m12 = aux + m;
M12 = aux + 2*m;
M21 = aux + 3*m;
S12 = aux + 4*m;
}
const G g(a, f);
for (mwIndex i = 0; i < m; ++i) {
if (abs(lat1[i]) <= 90 &&
lon1[i] >= -540 && lon1[i] < 540 &&
azi1[i] >= -540 && azi1[i] < 540) {
if (aux)
a12[i] = g.Direct(lat1[i], lon1[i], azi1[i], s12[i],
lat2[i], lon2[i], azi2[i],
m12[i], M12[i], M21[i], S12[i]);
else
g.Direct(lat1[i], lon1[i], azi1[i], s12[i],
lat2[i], lon2[i], azi2[i]);
}
}
}
void mexFunction( int nlhs, mxArray* plhs[],
int nrhs, const mxArray* prhs[] ) {
if (nrhs < 1)
mexErrMsgTxt("One input argument required.");
else if (nrhs > 3)
mexErrMsgTxt("More than three input arguments specified.");
else if (nrhs == 2)
mexErrMsgTxt("Must specify flattening with the major radius.");
else if (nlhs > 2)
mexErrMsgTxt("More than two output arguments specified.");
if (!( mxIsDouble(prhs[0]) && !mxIsComplex(prhs[0]) ))
mexErrMsgTxt("geodesic coordinates are not of type double.");
if (mxGetN(prhs[0]) != 4)
mexErrMsgTxt("geodesic coordinates must be M x 4 matrix.");
double a = Constants::WGS84_a<double>(), f = Constants::WGS84_f<double>();
if (nrhs == 3) {
if (!( mxIsDouble(prhs[1]) && !mxIsComplex(prhs[1]) &&
mxGetNumberOfElements(prhs[1]) == 1 ))
mexErrMsgTxt("Major radius is not a real scalar.");
a = mxGetScalar(prhs[1]);
if (!( mxIsDouble(prhs[2]) && !mxIsComplex(prhs[2]) &&
mxGetNumberOfElements(prhs[2]) == 1 ))
mexErrMsgTxt("Flattening is not a real scalar.");
f = mxGetScalar(prhs[2]);
}
mwSize m = mxGetM(prhs[0]);
const double* geodesic = mxGetPr(prhs[0]);
double* latlong = mxGetPr(plhs[0] = mxCreateDoubleMatrix(m, 3, mxREAL));
std::fill(latlong, latlong + 3*m, Math::NaN<double>());
double* aux =
nlhs == 2 ? mxGetPr(plhs[1] = mxCreateDoubleMatrix(m, 5, mxREAL)) :
NULL;
if (aux)
std::fill(aux, aux + 5*m, Math::NaN<double>());
try {
if (std::abs(f) <= 0.02)
compute<Geodesic>(a, f, m, geodesic, latlong, aux);
else
compute<GeodesicExact>(a, f, m, geodesic, latlong, aux);
}
catch (const std::exception& e) {
mexErrMsgTxt(e.what());
}
}
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