PikeAero::CArrayInterpolator< S, D > Class Template Reference

#include <carrayinterpolator.h>

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Public Member Functions
	CArrayInterpolator (CArray< S > *scale=NULL, CArray< D > *data=NULL)
CArray< D > *	data ()
CMachine::real	interpolate (const S &reference)
	Interpolate the sample scale data and return the intorpolated data.
CArray< S > *	scale ()
void	setData (CArray< D > *data)
void	setScale (CArray< S > *scale)
	~CArrayInterpolator ()
Private Member Functions
CMachine::real	dataOffset (CMachine::real scaleValueOffset, const D &lo, const D &hi)
	Determine the data offset as a real value between 0 and 1 relative to lo and hi data values.
CMachine::ubit32	scaleHi (const S &reference)
	Find the hi value on the scale relative to sample.
CMachine::ubit32	scaleLo (const S &reference)
	Find the lo value on the scale relative to sample.
CMachine::real	scaleOffset (const S &sample, const S &lo, const S &hi)
	Determine the sample scale offset as a decimal real between 0 and 1 relative to lo and hi scale values.
Private Attributes
CArray< D > *	mData
CArray< S > *	mScale

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Detailed Description

template<class S, class D>
class PikeAero::CArrayInterpolator< S, D >

Template class that interpolates scale value based on the scale and data CArray objects. NOTE: Scale and Data are assumed to be the same size. NOTE: Scale is assumed to be ascending. NOTE: Data can be either ascending or descending.

Author:

Michael Sharkey <mike@pikeaero.com>

Definition at line 35 of file carrayinterpolator.h.

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Constructor & Destructor Documentation

template<class S , class D >

PikeAero::CArrayInterpolator< S, D >::CArrayInterpolator	(	CArray< S > *	scale = NULL,
		CArray< D > *	data = NULL
	)			[inline]

Definition at line 24 of file carrayinterpolator.cpp.

 : CObject()
 , mScale(scale)
 , mData(data)
{
}

template<class S , class D >

PikeAero::CArrayInterpolator< S, D >::~CArrayInterpolator

(

)

[inline]

Definition at line 32 of file carrayinterpolator.cpp.

{
}

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Member Function Documentation

template<class S , class D >

CArray<D>* PikeAero::CArrayInterpolator< S, D >::data

(

)

[inline]

Definition at line 45 of file carrayinterpolator.h.

References PikeAero::CArrayInterpolator< S, D >::mData.

Referenced by PikeAero::CArrayInterpolator< S, D >::interpolate().

{return mData;}

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template<class S , class D >

CMachine::real PikeAero::CArrayInterpolator< S, D >::dataOffset	(	CMachine::real	scaleValueOffset,
		const D &	lo,
		const D &	hi
	)			[inline, private]

Determine the data offset as a real value between 0 and 1 relative to lo and hi data values.

Definition at line 81 of file carrayinterpolator.cpp.

References PikeAero::CArrayInterpolator< S, D >::scale().

Referenced by PikeAero::CArrayInterpolator< S, D >::interpolate().

{
    CMachine::real scale = hi - lo;
    return scale * scaleValueOffset;
}

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template<class S , class D >

CMachine::real PikeAero::CArrayInterpolator< S, D >::interpolate

(

const S &

reference

)

[inline]

Interpolate the sample scale data and return the intorpolated data.

Definition at line 91 of file carrayinterpolator.cpp.

References PikeAero::CArray< T >::at(), PikeAero::CArrayInterpolator< S, D >::data(), PikeAero::CArrayInterpolator< S, D >::dataOffset(), PikeAero::CArrayInterpolator< S, D >::scale(), PikeAero::CArrayInterpolator< S, D >::scaleHi(), PikeAero::CArrayInterpolator< S, D >::scaleLo(), and PikeAero::CArrayInterpolator< S, D >::scaleOffset().

{
    CMachine::ubit32 scaleIndexLo = scaleLo( sample );
    CMachine::ubit32 scaleIndexHi = scaleHi( sample );
    S scaleValueLo = scale()->at( scaleIndexLo );
    S scaleValueHi = scale()->at( scaleIndexHi );
    D dataValueLo = data()->at( scaleIndexLo );
    D dataValueHi = data()->at( scaleIndexHi );

    CMachine::real scaleValueOffset = scaleOffset( sample, scaleValueLo, scaleValueHi );
    CMachine::real dataValueOffset = dataOffset( scaleValueOffset, dataValueLo, dataValueHi );
    return (CMachine::real)dataValueLo + dataValueOffset;
}

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template<class S , class D >

CArray<S>* PikeAero::CArrayInterpolator< S, D >::scale

(

)

[inline]

Definition at line 44 of file carrayinterpolator.h.

References PikeAero::CArrayInterpolator< S, D >::mScale.

Referenced by PikeAero::CArrayInterpolator< S, D >::dataOffset(), PikeAero::CArrayInterpolator< S, D >::interpolate(), PikeAero::CArrayInterpolator< S, D >::scaleHi(), PikeAero::CArrayInterpolator< S, D >::scaleLo(), and PikeAero::CArrayInterpolator< S, D >::scaleOffset().

{return mScale;}

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template<class S , class D >

CMachine::ubit32 PikeAero::CArrayInterpolator< S, D >::scaleHi

(

const S &

reference

)

[inline, private]

Find the hi value on the scale relative to sample.

Definition at line 55 of file carrayinterpolator.cpp.

References PikeAero::CArrayInterpolator< S, D >::scale(), and PikeAero::CArray< T >::size().

Referenced by PikeAero::CArrayInterpolator< S, D >::interpolate().

{
    CMachine::ubit32 size = scale->size();
    for( CMachine::ubit32 i = 0; i < size; i++ )
    {
        if ( scale()->at(i) >= sample )
        {
            return i;
        }
    }
    return size > 0 ? (size-1) : 0;
}

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template<class S , class D >

CMachine::ubit32 PikeAero::CArrayInterpolator< S, D >::scaleLo

(

const S &

reference

)

[inline, private]

Find the lo value on the scale relative to sample.

Definition at line 39 of file carrayinterpolator.cpp.

References PikeAero::CArrayInterpolator< S, D >::scale().

Referenced by PikeAero::CArrayInterpolator< S, D >::interpolate().

{
    for( CMachine::bit32 i = (scale()->size()-1); i > 0; i-- )
    {
        if ( scale()->at((CMachine::ubit32)i) <= sample )
        {
            return (CMachine::ubit32)i;
        }

    }
    return 0;
}

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template<class S , class D >

CMachine::real PikeAero::CArrayInterpolator< S, D >::scaleOffset	(	const S &	sample,
		const S &	lo,
		const S &	hi
	)			[inline, private]

Determine the sample scale offset as a decimal real between 0 and 1 relative to lo and hi scale values.

Definition at line 71 of file carrayinterpolator.cpp.

References PikeAero::CArrayInterpolator< S, D >::scale().

Referenced by PikeAero::CArrayInterpolator< S, D >::interpolate().

{
    CMachine::real diff = sample - lo;
    CMachine::real scale = hi - lo;
    return diff / scale;
}

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template<class S , class D >

void PikeAero::CArrayInterpolator< S, D >::setData

(

CArray< D > *

data

)

[inline]

Definition at line 42 of file carrayinterpolator.h.

References PikeAero::CArrayInterpolator< S, D >::mData.

{mData=data;}

template<class S , class D >

void PikeAero::CArrayInterpolator< S, D >::setScale

(

CArray< S > *

scale

)

[inline]

Definition at line 41 of file carrayinterpolator.h.

References PikeAero::CArrayInterpolator< S, D >::mScale.

{mScale=scale;}

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Field Documentation

template<class S , class D >

CArray<D>* PikeAero::CArrayInterpolator< S, D >::mData [private]

Definition at line 56 of file carrayinterpolator.h.

Referenced by PikeAero::CArrayInterpolator< S, D >::data(), and PikeAero::CArrayInterpolator< S, D >::setData().

template<class S , class D >

CArray<S>* PikeAero::CArrayInterpolator< S, D >::mScale [private]

Definition at line 55 of file carrayinterpolator.h.

Referenced by PikeAero::CArrayInterpolator< S, D >::scale(), and PikeAero::CArrayInterpolator< S, D >::setScale().

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

• carrayinterpolator.h
• carrayinterpolator.cpp