fast lookup tables with reduced accuracy More...

#include <LookupTable.h>

Static Public Member Functions
static void	initialize ()
	initialize lookup tables More...

static double	sinLookup (double x)
	sinus lookup table More...

static double	cosLookup (double x)
	cosine lookup table More...

static double	acosLookup (double x)
	arcus cosine lookup table More...

static float	angularDistance (const PointingVector &p1, const PointingVector &p2) noexcept
	angular distance between two points More...

static float	angularDistance (double phi1, double theta1, double phi2, double theta2) noexcept
	angular distance between two points More...

Static Private Attributes
static std::vector< std::vector< std::vector< float > > >	angularDistanceLookup = {}
	lookup table for angular distance between two points More...

static std::vector< double >	sinLookupTable
	table for fast lookup for sine function with reduced accuracy. Key is fraction of .001 pi More...

static std::vector< double >	cosLookupTable
	table for fast lookup for cosine function with reuced accuracy. Key is fraction of .001 pi More...

static std::vector< double >	acosLookupTable

Detailed Description

fast lookup tables with reduced accuracy

the key is always an integer that counts in .001 intervals (using th sinLookup with a key of 327 would mean you get sin(0.327) as a return value)

Author: Matthias Schartner

Date: 02.08.2017

Member Function Documentation

double LookupTable::acosLookup ( double x )

static

arcus cosine lookup table

Author: Matthias Schartner

Parameters

x	argument in radians

Returns: arcus cosine of argument

float LookupTable::angularDistance	(	const PointingVector &	p1,
		const PointingVector &	p2
	)

staticnoexcept

angular distance between two points

Author: Matthias Schartner

Parameters

p1	start pointing vector
p2	end pointing vector

Returns: angular distance between two points in radians

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float LookupTable::angularDistance	(	double	phi1,
		double	theta1,
		double	phi2,
		double	theta2
	)

staticnoexcept

angular distance between two points

Author: Matthias Schartner

Parameters

phi1	start phi in radians
theta1	start theta in radians
phi2	end phi in radians
theta2	end thatet in radians

Returns: angular distance between two points in radians

double LookupTable::cosLookup ( double x )

static

cosine lookup table

Author: Matthias Schartner

Parameters

x	argument in radians

Returns: cosine of argument

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void LookupTable::initialize ( )

static

initialize lookup tables

Author: Matthias Schartner

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double LookupTable::sinLookup ( double x )

static

sinus lookup table

Author: Matthias Schartner

Parameters

x	argument in radians

Returns: sinus of argument

Member Data Documentation

std::vector< double > VieVS::LookupTable::acosLookupTable

staticprivate

table for fast lookup for inverse cosine function with reduced accuracy. Key is fraction of .001 pi

vector< vector< vector< float > > > VieVS::LookupTable::angularDistanceLookup = {}

staticprivate

lookup table for angular distance between two points

std::vector< double > VieVS::LookupTable::cosLookupTable

staticprivate

table for fast lookup for cosine function with reuced accuracy. Key is fraction of .001 pi

std::vector< double > VieVS::LookupTable::sinLookupTable

staticprivate

table for fast lookup for sine function with reduced accuracy. Key is fraction of .001 pi

The documentation for this class was generated from the following files:

/home/travis/build/TUW-VieVS/VieSchedpp/Misc/LookupTable.h
/home/travis/build/TUW-VieVS/VieSchedpp/Misc/LookupTable.cpp

Static Public Member Functions

Static Private Attributes

Detailed Description

Member Function Documentation

Member Data Documentation