JSpline+: Change List

Version 1.25 (February 9, 2001)

The library is renamed to JSpline+. The package ru.sscc.spline.base is removed. Its contents is divided to the following packages: ru.sscc.spline.reduction contains multi-D space reduction classes and reduced mesh classes; ru.sscc.spline.mesh contains 1D meshes and auxiliary classes; ru.sscc.spline.creator contains spline creator classes. The OrderedPreparator class is renamed to MatrixPreparator and moved to the ru.sscc.spline.polynomial packages. Its subclasses are moved also.

ru.sscc.spline.creator

renamed from ru.sscc.spline.base. It contains now only spline creation related classes: SplineCreator, SmoothingSplineCreator, and SmoothingPreparator.

ru.sscc.spline.mesh

is a new package. It contains the SimpleMesh class and its subclasses + SimpleMeshWorkspace.

• SimpleMesh: new methods extendedMeshDistance, averageStep. Methods getOrigin and getScale are renamed to origin and scale respectively.

ru.sscc.spline.reduction

is a new package. It is extracted from the ru.sscc.spline.base package and essentially modified.

• Reduction: a new interface. It describes a multi-D space reduction algorithm.
• ScaledReduction: a new class. Implements a reduction with different scalings belong coordinate axis.
• UniscaledReduction: a new class. Implements a reduction with the same scaling in all directions.
• IdenticReduction: a new class. Implements the identic reduction (without changes).
• OrthogonalReduction: a new class. Implements a reduction composed from another reduction and orthogonalization with respect to specified set of vectors.
• ReducedMesh: essentially modified. It consists now of a reduction and a reduced mesh and implements the Reduction interface. Two new static methods findOrthogonalBase and coverByOrthogonalReduction are added.
• ScatteredMesh: a new class. It implements the ReducedMesh with the float type internal storage.
• StrictScatteredMesh: a new class. It implements the ReducedMesh with the double type internal storage.

ru.sscc.spline.polynomial

A bug in OddSplineCreator fixed. This error was added in the previous version while reorganization of creator classes.

• MatrixPreparator: renamed from OrderedPreparator and modified in such a way to break off the meshes and matrix preparator association. This class is moved from the ru.sscc.spline.base package.
• UniformPreparator: moved from the ru.sscc.spline.base package.
• NonuniformPreparator: moved from the ru.sscc.spline.base package.

ru.sscc.util.data

• RealVectors: a new method calculateCenter.

Version 1.24 (December 18, 2000)

The Samples for Java AppLib are added.

ru.sscc.matrix.solve

• RealDirectSolver: the factorize() method now returns the RealDirectSolver instance (itself). This trick is useful in solution of one linear system only.
• RealSquareSolver is renamed to RealDenseSolver.
• RealCommonSolver is inherited now from RealDenseSolver. New methods solveT(b,x) and backSubstitutionT(b,y) are added. Methods renaming: getMatrixRange() ® matrixRange(), getNullSpaceRange() ® nullSpaceRange(), getNullSpace() ® nullSpace(), and getBalanceVector() ® balanceVector().
• GreenSolver: new class. Solves special linear block system that appears in Duchon's spline construction algorithm.
• GeneralGreenSolver: new class. It generalizes the GreenSolver by solving block system with an arbitrary right-hand side.
• EliminationSolver: bug in transformT() fixed.

ru.sscc.matrix

• DenseMatrix: new methods multiplyAndAdd(c,x,y), multiplyAndAddT(c,x,y), norm(), normMax(), and normSum().

ru.sscc.spline.base

• SmoothingSplineCreator: new class. It extends the SplineCreator. This class is the basic class for all spline creators using the selection of smoothing parameter by the residual criterion.

ru.sscc.spline.polynomial

• OddSplineCreator: now extends the SmoothingSplineCreator. Some useful methods and attributes are moved to the superclass.
• POddSplineCreator: internal modifications.

ru.sscc.spline.analytic

The package is ready for use.

• GSplineCreator: new class. Creates multivariate Duchon's splines in 4 different modes. Allows interpolation, fitting, and selection of the smoothing parameter from the residual criterion.
• GSplinePreparator: new class. Internal class used in the creator.

Version 1.23 (November 6, 2000)

ru.sscc.util

• TimeCounter: a new static method toString(timeMillis).
• Rotation: new methods sin(), cos(), and prepare(sin,cos). The construct(tan) method is renamed to prepare(tan).

ru.sscc.util.data

• RealVector: the vector length control is added.
• RealVectors: the vectors dimension and size control is added.
• ChainVector: a new class. Logically treats a chain of vectors as one continuous vector.
• ChainPointer: a new class. Accompanying class to the ChainVector.
• RealContainer: the getContainer() method is renamed to getData().
• RealMath: new methods recalculatePolynomial(...).

ru.sscc.matrix

• RealMatrix: the control of matrix dimensions is added.
• DenseMatrix: new methods getRow(i) and getColumn(j).
• TransposedMatrix: a new class. It provides the logical transposing of an algebraic matrix.

ru.sscc.matrix.solve

• RealDirectSolver: the clone() method is added. A clone of the solver has no attached matrix.

ru.sscc.spline.base

• SmoothingPreparator: the clone() method is added.
• SplineCreator: the clone() method is added; the getBody() method is renamed to getSplineBody().
• StrictNonuniformMesh: a new class. Implements the strict version of a nonuniform mesh stored in the double[] type container.
• StrictScaledMesh: a new class. Implements the strict version of an multi-D scaled mesh stored in the double[] type container.
• StrictUniscaledMesh: a new class. Implements the strict version of an multi-D uniscaled mesh stored in the double[] type container.

ru.sscc.spline.polynomial

• OddSplineCreator: a new abstract class having the same interface as its direct subclass POddSplineCreator. Most methods of POddSplineCreator are moved to the superclass. We plane to implement one more direct subclass, BOddSplineCreator, that will construct an odd spline with B-spline's representation of the result.

Version 1.22 (October 24, 2000)

First official release.