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LocalCartesian.cpp
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/**
* \file LocalCartesian.cpp
* \brief Implementation for GeographicLib::LocalCartesian class
*
* Copyright (c) Charles Karney (2008-2015) <karney@alum.mit.edu> and licensed
* under the MIT/X11 License. For more information, see
* https://geographiclib.sourceforge.io/
**********************************************************************/
#include <GeographicLib/LocalCartesian.hpp>
namespace GeographicLib {
using namespace std;
void LocalCartesian::Reset(real lat0, real lon0, real h0) {
_lat0 = Math::LatFix(lat0);
_lon0 = Math::AngNormalize(lon0);
_h0 = h0;
_earth.Forward(_lat0, _lon0, _h0, _x0, _y0, _z0);
real sphi, cphi, slam, clam;
Math::sincosd(_lat0, sphi, cphi);
Math::sincosd(_lon0, slam, clam);
Geocentric::Rotation(sphi, cphi, slam, clam, _r);
}
void LocalCartesian::MatrixMultiply(real M[dim2_]) const {
// M = r' . M
real t[dim2_];
copy(M, M + dim2_, t);
for (size_t i = 0; i < dim2_; ++i) {
size_t row = i / dim_, col = i % dim_;
M[i] = _r[row] * t[col] + _r[row+3] * t[col+3] + _r[row+6] * t[col+6];
}
}
void LocalCartesian::IntForward(real lat, real lon, real h,
real& x, real& y, real& z,
real M[dim2_]) const {
real xc, yc, zc;
_earth.IntForward(lat, lon, h, xc, yc, zc, M);
xc -= _x0; yc -= _y0; zc -= _z0;
x = _r[0] * xc + _r[3] * yc + _r[6] * zc;
y = _r[1] * xc + _r[4] * yc + _r[7] * zc;
z = _r[2] * xc + _r[5] * yc + _r[8] * zc;
if (M)
MatrixMultiply(M);
}
void LocalCartesian::IntReverse(real x, real y, real z,
real& lat, real& lon, real& h,
real M[dim2_]) const {
real
xc = _x0 + _r[0] * x + _r[1] * y + _r[2] * z,
yc = _y0 + _r[3] * x + _r[4] * y + _r[5] * z,
zc = _z0 + _r[6] * x + _r[7] * y + _r[8] * z;
_earth.IntReverse(xc, yc, zc, lat, lon, h, M);
if (M)
MatrixMultiply(M);
}
} // namespace GeographicLib
real
GeographicLib::Math::real real
Definition GeodSolve.cpp:28
LocalCartesian.hpp
Header for GeographicLib::LocalCartesian class.
GeographicLib::Geocentric::Forward
void Forward(real lat, real lon, real h, real &X, real &Y, real &Z) const
Definition Geocentric.hpp:132
GeographicLib::LocalCartesian::Reset
void Reset(real lat0, real lon0, real h0=0)
Definition LocalCartesian.cpp:16
GeographicLib::Math::LatFix
static T LatFix(T x)
Definition Math.hpp:315
GeographicLib::Math::sincosd
static void sincosd(T x, T &sinx, T &cosx)
Definition Math.cpp:104
GeographicLib::Math::AngNormalize
static T AngNormalize(T x)
Definition Math.cpp:69
GeographicLib
Namespace for GeographicLib.
Definition Accumulator.cpp:12
std
Definition NearestNeighbor.hpp:806