osg::ImageLanczos3Filter Class Reference

#include <OSGImageScaler.h>

Inheritance diagram for osg::ImageLanczos3Filter:

List of all members.

Public Member Functions
	ImageLanczos3Filter (osg::Real64 dWidth=osg::Real64(1.0))
virtual	~ImageLanczos3Filter (void)
virtual osg::Real64	filter (osg::Real64 dVal) const
osg::Real64	getWidth (void) const
void	setWidth (osg::Real64 dWidth)
Protected Attributes
osg::Real64	m_dWidth
Private Member Functions
osg::Real64	sinc (osg::Real64 x) const

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Detailed Description

lanczos3 filter

Definition at line 94 of file OSGImageScaler.h.

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Constructor & Destructor Documentation

ImageLanczos3Filter::ImageLanczos3Filter

(

osg::Real64

dWidth = osg ::Real64(1.0)

)

Definition at line 147 of file OSGImageScaler.cpp.

                                                      :
    ImageGenericFilter(dWidth)
{
}

ImageLanczos3Filter::~ImageLanczos3Filter

(

void

)

[virtual]

Definition at line 152 of file OSGImageScaler.cpp.

{
}

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Member Function Documentation

Real64 ImageLanczos3Filter::filter

(

osg::Real64

dVal

)

const [virtual]

Implements osg::ImageGenericFilter.

Definition at line 164 of file OSGImageScaler.cpp.

References sinc().

{
    if(dVal < 0)
        dVal = -dVal;
    if(dVal < 3.0)
        return(sinc(dVal) * sinc(dVal / 3.0));
    return 0.0;
}

Real64 ImageLanczos3Filter::sinc

(

osg::Real64

x

)

const [private]

Definition at line 156 of file OSGImageScaler.cpp.

References OSG_FILTER_PI.

Referenced by filter().

{
    x *= OSG_FILTER_PI;
    if(x != 0.0)
        return(sin(x) / x);
    return 1.0;
}

Real64 ImageGenericFilter::getWidth

(

void

)

const [inherited]

Definition at line 41 of file OSGImageScaler.cpp.

References osg::ImageGenericFilter::m_dWidth.

Referenced by osg::ImageScaler::calcContributions().

{
    return m_dWidth;
}

void ImageGenericFilter::setWidth

(

osg::Real64

dWidth

)

[inherited]

Definition at line 46 of file OSGImageScaler.cpp.

References osg::ImageGenericFilter::m_dWidth.

{
    m_dWidth = dWidth;
}

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Member Data Documentation

osg ::Real64 osg::ImageGenericFilter::m_dWidth [protected, inherited]

Definition at line 29 of file OSGImageScaler.h.

Referenced by osg::ImageBlackmanFilter::filter(), osg::ImageHammingFilter::filter(), osg::ImageGaussianFilter::filter(), osg::ImageLinearFilter::filter(), osg::ImageBoxFilter::filter(), osg::ImageGenericFilter::getWidth(), and osg::ImageGenericFilter::setWidth().

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

• OSGImageScaler.h
• OSGImageScaler.cpp