ossimLagrangeInterpolator Class Reference

#include <ossimLagrangeInterpolator.h>

Inheritance diagram for ossimLagrangeInterpolator:

Public Member Functions
	ossimLagrangeInterpolator ()
	ossimLagrangeInterpolator (std::istream &)
	ossimLagrangeInterpolator (const std::vector< double > &t_array, const std::vector< NEWMAT::ColumnVector > &data_array)
	~ossimLagrangeInterpolator ()
void	addData (const double &t, const NEWMAT::ColumnVector &data)
bool	interpolate (const double &t, NEWMAT::ColumnVector &result) const
Public Member Functions inherited from ossimReferenced
	ossimReferenced ()
	ossimReferenced (const ossimReferenced &)
ossimReferenced &	operator= (const ossimReferenced &)
void	ref () const
	increment the reference count by one, indicating that this object has another pointer which is referencing it. More...
void	unref () const
	decrement the reference count by one, indicating that a pointer to this object is referencing it. More...
void	unref_nodelete () const
	decrement the reference count by one, indicating that a pointer to this object is referencing it. More...
int	referenceCount () const

Private Attributes
std::vector< double >	theTeeArray
std::vector< NEWMAT::ColumnVector >	theDataArray
std::vector< double >	theNormalizer
ossim_uint32	theNumElements

Friends
std::ostream &	operator<< (std::ostream &, const ossimLagrangeInterpolator &)
std::istream &	operator>> (std::istream &, ossimLagrangeInterpolator &)

Additional Inherited Members
Protected Member Functions inherited from ossimReferenced
virtual	~ossimReferenced ()

Detailed Description

Definition at line 23 of file ossimLagrangeInterpolator.h.

Constructor & Destructor Documentation

ossimLagrangeInterpolator() [1/3]

ossimLagrangeInterpolator::ossimLagrangeInterpolator ( )

inline

Definition at line 29 of file ossimLagrangeInterpolator.h.

: theNumElements(0) {}

ossimLagrangeInterpolator() [2/3]

ossimLagrangeInterpolator::ossimLagrangeInterpolator

(

std::istream &

)

ossimLagrangeInterpolator() [3/3]

ossimLagrangeInterpolator::ossimLagrangeInterpolator	(	const std::vector< double > &	t_array,
		const std::vector< NEWMAT::ColumnVector > &	data_array
	)

Definition at line 42 of file ossimLagrangeInterpolator.cpp.

:  theTeeArray (t_array),
   theDataArray(data_array),
   theNumElements(0)
{
   static const char MODULE[]="ossimLagrangeInterpolator(int, double, Vector) CONSTRUCTOR";
   if (traceDebug())  CLOG << "entering..." << endl;

   // Assign data members:
   ossim_uint32 numPoints = (ossim_uint32) theTeeArray.size();
   if (theDataArray.size() > 0)
      theNumElements = theDataArray[0].Nrows();

   ossim_uint32 i;
   double n;
   for (i=0; i<numPoints; i++)
   {
      // Compute the normalizer value at this data point:
      n = 1.0;
      for (ossim_uint32 j=0; j<numPoints; j++)
      {
         if (i != j) 
            n *= (theTeeArray[i] - theTeeArray[j]);
      }
      theNormalizer.push_back(n);
   }

   if (traceDebug())  CLOG << "returning..." << endl;
}

~ossimLagrangeInterpolator()

ossimLagrangeInterpolator::~ossimLagrangeInterpolator

(

)

Definition at line 77 of file ossimLagrangeInterpolator.cpp.

{
}

Member Function Documentation

addData()

void ossimLagrangeInterpolator::addData	(	const double &	t,
		const NEWMAT::ColumnVector &	data
	)

Definition at line 84 of file ossimLagrangeInterpolator.cpp.

References theDataArray, and theTeeArray.

{
   theTeeArray.push_back(t);
   theDataArray.push_back(data);
}

interpolate()

bool ossimLagrangeInterpolator::interpolate	(	const double &	t,
		NEWMAT::ColumnVector &	result
	)		const

Definition at line 93 of file ossimLagrangeInterpolator.cpp.

Referenced by ossimRS1SarModel::imagingRay().

{
   static const char MODULE[] = "ossimLagrangeInterpolator::interpolate()";
   if (traceDebug())  CLOG << "entering..." << endl;

   // Prepare to sum:
   double weight;

   // Perform interpolation:
   ossim_uint32 numPoints = (ossim_uint32) theTeeArray.size();
   for (ossim_uint32 i=0; i<numPoints; i++)
   {
      weight = 1.0/theNormalizer[i];
      for (ossim_uint32 j=0; j<numPoints; j++)
      {
         if (i != j) 
            weight *= (t - theTeeArray[j]);
      }

      result += theDataArray[i] * weight;
   }

   if (traceDebug())  CLOG << "leaving." << endl;
   return true;
}

Friends And Related Function Documentation

operator<<

std::ostream& operator<< ( std::ostream &  , const ossimLagrangeInterpolator &    )

friend

operator>>

std::istream& operator>> ( std::istream &  , ossimLagrangeInterpolator &    )

friend

Member Data Documentation

theDataArray

std::vector<NEWMAT::ColumnVector> ossimLagrangeInterpolator::theDataArray

private

Definition at line 41 of file ossimLagrangeInterpolator.h.

Referenced by addData(), and operator>>().

theNormalizer

std::vector<double> ossimLagrangeInterpolator::theNormalizer

private

Definition at line 42 of file ossimLagrangeInterpolator.h.

Referenced by operator>>().

theNumElements

ossim_uint32 ossimLagrangeInterpolator::theNumElements

private

Definition at line 43 of file ossimLagrangeInterpolator.h.

Referenced by operator>>().

theTeeArray

std::vector<double> ossimLagrangeInterpolator::theTeeArray

private

Definition at line 40 of file ossimLagrangeInterpolator.h.

Referenced by addData(), and operator>>().

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

• ossimLagrangeInterpolator.h
• ossimLagrangeInterpolator.cpp