OBSqrtTbl Class Reference

Square Root lookup table - given a distance squared returns distance. More...

#include <openbabel/obutil.h>

List of all members.

Public Member Functions
	OBSqrtTbl ()
	OBSqrtTbl (const double max, const double incr)
	~OBSqrtTbl ()
double	Sqrt (double d2) const
void	Init (double max, double incr)

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Detailed Description

Square Root lookup table - given a distance squared returns distance.

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Constructor & Destructor Documentation

OBSqrtTbl

(

)

[inline]

OBSqrtTbl	(	const double	max,
		const double	incr
	)		[inline]

Create a square root table to handle up to the square root of max (e.g., if you want the square root of 144, supply 12 for max)

Parameters:

max	The maximum square root stored in the lookup table
incr	The floating point resolution of the lookup table

~OBSqrtTbl

(

)

[inline]

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Member Function Documentation

double Sqrt

(

double

d2 )

const [inline]

Fast square root calculation using a lookup table.

Returns:

Square root of d2

void Init	(	double	max,
		double	incr
	)		[inline]

Initialize the square root lookup table.

Parameters:

max	The maximum square root stored in the lookup table (e.g., if you want the square root of 144, supply 12 for max)
incr	The floating point resolution of the lookup table

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

• obutil.h