vec3d.h File Reference

3D floating point vector functions. More...

#include "QueryEngine/ExtensionFunctions/h3lib/lib/vec3d.hpp"

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Macros
#define	Z_INDEX   2
#define	Vec3d(variable_name)   double variable_name[3]
#define	Vec3dArray(variable_name, size)   double variable_name[size][3]

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

Detailed Description

3D floating point vector functions.

Definition in file vec3d.h.

Macro Definition Documentation

#define Vec3d

(

variable_name

)

double variable_name[3]

Definition at line 29 of file vec3d.h.

Referenced by _geoToHex2d().

#define Vec3dArray	(		variable_name,
			size
	)		double variable_name[size][3]

Definition at line 30 of file vec3d.h.

#define Z_INDEX   2

Definition at line 28 of file vec3d.h.

Referenced by _geoToVec3d(), and _pointSquareDist().

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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