ru.sscc.spline.analytic
Class GSplineBody

java.lang.Object
  |
  +--ru.sscc.spline.analytic.GSplineBody

public class GSplineBody

extends java.lang.Object

implements SplineBody

The implementation of spline body interface supporting the calculation of spline value for Duchon's spline. A partial derivative calculation is not possible.

See Also:

Serialized Form

Field Summary

protected int	dataSize The size of coefficients vector.
protected ReducedMesh	mesh The mesh.
protected byte	mode The spline mode (0, 1, 2, or 3).

Fields inherited from interface ru.sscc.spline.SplineBody

DERIVATIVE_OUT_OF_RANGE, ONE_D_NONSUPPORTED, POINT_OUT_OF_RANGE

Constructor Summary

GSplineBody(int mode, ReducedMesh mesh)
Constructor.

Method Summary

double	calculate(SplineWorkspace workspace) Calculates a spline value at a required point by the formula : s(s)= SliG(s,ti)+ Smasa.
SplineWorkspace	createWorkspace(RealPointer data) Creates a workspace required for a Green spline value calculation.
int	dimension() Return the mesh dimension.
int	getVectorLength() Return the coefficients vector size.
int	maxQuote() Return the coefficients vector size because all coefficients are always needed in spline value calculation.
void	prepareBase(RealPointer x, RealPointer vector) Calculates the vector of spline base values at a point x.
void	prepareWorkspace(SplineWorkspace workspace, double point, int index, int count) Prepares a workspace for a Green spline value calculation in 1D case.
void	prepareWorkspace(SplineWorkspace workspace, RealPointer point, int count) Prepares a workspace for a spline value calculation: calculates the vector of spline base values at the reduced point and puts coordinates of reduced point into workspace.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mesh

protected ReducedMesh mesh

The mesh.

dataSize

protected int dataSize

The size of coefficients vector.

mode

protected byte mode

The spline mode (0, 1, 2, or 3).

Constructor Detail

GSplineBody

public GSplineBody(int mode,
                   ReducedMesh mesh)

Constructor.

Parameters:

mode - a spline mode from the range 0..3: 0 means pseudo-linear spline with constant polynomial kernel; 1, 2, and 3 mean pseudo-linear, pseudo-quadratic, and pseudo-cubic spline respectively with linear polynomial kernel

mesh - a mesh

Method Detail

createWorkspace

public SplineWorkspace createWorkspace(RealPointer data)

Creates a workspace required for a Green spline value calculation. The workspace contains the vector of spline base values at the point, a reduced point to calculate the spline, and the coefficients vector.

Specified by:

createWorkspace in interface SplineBody

Parameters:

data - a pointer to coefficients vector

dimension

public int dimension()

Return the mesh dimension.

Specified by:

dimension in interface SplineBody

getVectorLength

public int getVectorLength()

Return the coefficients vector size.

Specified by:

getVectorLength in interface SplineBody

maxQuote

public int maxQuote()

Return the coefficients vector size because all coefficients are always needed in spline value calculation.

Specified by:

maxQuote in interface SplineBody

prepareWorkspace

public void prepareWorkspace(SplineWorkspace workspace,
                             double point,
                             int index,
                             int count)

Prepares a workspace for a Green spline value calculation in 1D case.

Specified by:

prepareWorkspace in interface SplineBody

Parameters:

workspace - a spline workspace

point - a point on the real axis

index - must be 0

count - don't use in analitic case

prepareWorkspace

public void prepareWorkspace(SplineWorkspace workspace,
                             RealPointer point,
                             int count)

Prepares a workspace for a spline value calculation: calculates the vector of spline base values at the reduced point and puts coordinates of reduced point into workspace.

Specified by:

prepareWorkspace in interface SplineBody

Parameters:

workspace - a spline workspace

point - a point in the space of independent variables

count - a number of splines will be calculated later

calculate

public double calculate(SplineWorkspace workspace)

Calculates a spline value at a required point by the formula : s(s)= Sl_iG(s,t_i)+ Sm_as^a. All information on the point should be prepared before by one of prepareWorkspace methods.

Specified by:

calculate in interface SplineBody

Parameters:

workspace - a spline workspace

Returns:

the spline value

prepareBase

public void prepareBase(RealPointer x,
                        RealPointer vector)

Calculates the vector of spline base values at a point x.

Parameters:

x - a point in reduced coordinates

vector - a vector to store results