vec3d.hpp File Reference

#include "QueryEngine/ExtensionFunctions/h3lib/include/vec3d.h"

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Functions
EXTENSION_INLINE double	_square (double x)
EXTENSION_NOINLINE double	_pointSquareDist (const Vec3d(v1), const Vec3d(v2))
EXTENSION_NOINLINE bool	_geoToVec3d (const GeoCoord(geo), Vec3d(v))

Function Documentation

EXTENSION_NOINLINE bool _geoToVec3d	(	const	GeoCoordgeo,
		Vec3d(v)
	)

Calculate the 3D coordinate on unit sphere from the latitude and longitude.

Parameters

geo	The latitude and longitude of the point.
v	The 3D coordinate of the point.

Definition at line 52 of file vec3d.hpp.

References LAT_INDEX, LON_INDEX, X_INDEX, Y_INDEX, and Z_INDEX.

Referenced by _geoToHex2d().

                                                                   {
  double r = cos(geo[LAT_INDEX]);

  v[Z_INDEX] = sin(geo[LAT_INDEX]);
  v[X_INDEX] = cos(geo[LON_INDEX]) * r;
  v[Y_INDEX] = sin(geo[LON_INDEX]) * r;

  return true;
}

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EXTENSION_NOINLINE double _pointSquareDist	(	const	Vec3dv1,
		const	Vec3dv2
	)

Calculate the square of the distance between two 3D coordinates.

Parameters

v1	The first 3D coordinate.
v2	The second 3D coordinate.

Returns

The square of the distance between the given points.

Definition at line 41 of file vec3d.hpp.

References _square(), X_INDEX, Y_INDEX, and Z_INDEX.

Referenced by _geoToHex2d().

                                                                             {
  return _square(v1[X_INDEX] - v2[X_INDEX]) + _square(v1[Y_INDEX] - v2[Y_INDEX]) +
         _square(v1[Z_INDEX] - v2[Z_INDEX]);
}

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EXTENSION_INLINE double _square

(

double

x

)

Square of a number

Parameters

x	The input number.

Returns

The square of the input number.

Definition at line 30 of file vec3d.hpp.

Referenced by _pointSquareDist().

                                          {
  return x * x;
}

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