ignition::math::BiQuad< T > Class Template Reference

Bi-quad filter base class. More...

#include <ignition/math/Filter.hh>

Inheritance diagram for ignition::math::BiQuad< T >:

Public Member Functions
	BiQuad ()=default
	Constructor. More...
	BiQuad (double _fc, double _fs)
	Constructor. More...
void	Fc (double _fc, double _fs)
	Set the cutoff frequency and sample rate. More...
void	Fc (double _fc, double _fs, double _q)
	Set the cutoff frequency, sample rate and Q coefficient. More...
virtual const T &	Process (const T &_x)
	Update the filter's output. More...
virtual void	Set (const T &_val)
	Set the current filter's output. More...
Public Member Functions inherited from ignition::math::Filter< T >
virtual	~Filter ()
	Destructor. More...
virtual const T &	Value () const
	Get the output of the filter. More...

Protected Attributes
double	a0 = 0
	Input gain control coefficients. More...
double	a1 = 0
double	a2 = 0
double	b0 = 0
double	b1 = 0
double	b2 = 0
T	x1 {}
	Gain of the feedback coefficients. More...
T	x2 {}
T	y1 {}
T	y2 {}
Protected Attributes inherited from ignition::math::Filter< T >
T	y0 {}
	Output. More...

Detailed Description

template<class T>
class ignition::math::BiQuad< T >

Bi-quad filter base class.

See Also

http://www.earlevel.com/main/2003/03/02/the-bilinear-z-transform/

Constructor & Destructor Documentation

template<class T>

ignition::math::BiQuad< T >::BiQuad ( )

default

Constructor.

template<class T>

ignition::math::BiQuad< T >::BiQuad ( double  _fc, double  _fs  )

inline

Constructor.

Parameters

[in]	_fc	Cutoff frequency.
[in]	_fs	Sample rate.

Member Function Documentation

template<class T>

void ignition::math::BiQuad< T >::Fc ( double  _fc, double  _fs  )

inlinevirtual

Set the cutoff frequency and sample rate.

Parameters

[in]	_fc	Cutoff frequency.
[in]	_fs	Sample rate.

Implements ignition::math::Filter< T >.

Referenced by ignition::math::BiQuad< math::Vector3d >::BiQuad(), and ignition::math::BiQuad< math::Vector3d >::Fc().

template<class T>

void ignition::math::BiQuad< T >::Fc ( double  _fc, double  _fs, double  _q  )

inline

Set the cutoff frequency, sample rate and Q coefficient.

Parameters

[in]	_fc	Cutoff frequency.
[in]	_fs	Sample rate.
[in]	_q	Q coefficient.

template<class T>

virtual const T& ignition::math::BiQuad< T >::Process ( const T &  _x )

inlinevirtual

Update the filter's output.

Parameters

[in]

_x

Input value.

Returns

The filter's current output.

template<class T>

virtual void ignition::math::BiQuad< T >::Set ( const T &  _val )

inlinevirtual

Set the current filter's output.

Parameters

[in]

_val

New filter's output.

Reimplemented from ignition::math::Filter< T >.

Member Data Documentation

template<class T>

double ignition::math::BiQuad< T >::a0 = 0

protected

Input gain control coefficients.

Referenced by ignition::math::BiQuad< math::Vector3d >::Fc(), and ignition::math::BiQuad< math::Vector3d >::Process().

template<class T>

double ignition::math::BiQuad< T >::a1 = 0

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Fc(), and ignition::math::BiQuad< math::Vector3d >::Process().

template<class T>

double ignition::math::BiQuad< T >::a2 = 0

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Fc(), and ignition::math::BiQuad< math::Vector3d >::Process().

template<class T>

double ignition::math::BiQuad< T >::b0 = 0

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Fc().

template<class T>

double ignition::math::BiQuad< T >::b1 = 0

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Fc(), and ignition::math::BiQuad< math::Vector3d >::Process().

template<class T>

double ignition::math::BiQuad< T >::b2 = 0

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Fc(), and ignition::math::BiQuad< math::Vector3d >::Process().

template<class T>

T ignition::math::BiQuad< T >::x1 {}

protected

Gain of the feedback coefficients.

Referenced by ignition::math::BiQuad< math::Vector3d >::Process(), and ignition::math::BiQuad< math::Vector3d >::Set().

template<class T>

T ignition::math::BiQuad< T >::x2 {}

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Process(), and ignition::math::BiQuad< math::Vector3d >::Set().

template<class T>

T ignition::math::BiQuad< T >::y1 {}

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Process(), and ignition::math::BiQuad< math::Vector3d >::Set().

template<class T>

T ignition::math::BiQuad< T >::y2 {}

protected

Referenced by ignition::math::BiQuad< math::Vector3d >::Process(), and ignition::math::BiQuad< math::Vector3d >::Set().

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

• Filter.hh