ru.sscc.spline.reduction
Class ScaledReduction

java.lang.Object
  |
  +--ru.sscc.spline.reduction.ScaledReduction

public final class ScaledReduction

extends java.lang.Object

implements Reduction

The implementation of an abstract space reduction based on affine transform y_i = s_i*(x_i-o_i) with different scale factors for different directions. Here x_i are initial point coordinates, y_i are reduced point coordinates, s_i are scale factors in i-th direction, o_i are coordinates of an origin.

See Also:

Serialized Form

Constructor Summary

ScaledReduction(RealPointer origin, RealPointer scale, int dimension)
Constructs the reduction based on user's origin and scale vectors.

ScaledReduction(RealVectors data)
Constructs the reduction scale vector in such a way to map a mesh bounding box to the unit multidimensional cube.

ScaledReduction(RealVectors data, RealPointer scale)
Constructs the reduction based on user's scale vector.

Method Summary

int	initialDimension() Returns the dimension of initial space of independent varibles.
int	reducedDimension() Returns the dimension of reduced space of independent varibles.
void	reducePoint(RealPointer x, RealPointer y) Transforms a point coordinates from initial to reduced using affine transformation yi = si*(xi-oi).

Methods inherited from class java.lang.Object

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

Constructor Detail

ScaledReduction

public ScaledReduction(RealPointer origin,
                       RealPointer scale,
                       int dimension)

Constructs the reduction based on user's origin and scale vectors.

Parameters:

origin - the reduction origin

scale - the scale vector

dimension - the space dimension

ScaledReduction

public ScaledReduction(RealVectors data)

Constructs the reduction scale vector in such a way to map a mesh bounding box to the unit multidimensional cube. The mass center is associated with the new origin.

Parameters:

data - the initial mesh

ScaledReduction

public ScaledReduction(RealVectors data,
                       RealPointer scale)

Constructs the reduction based on user's scale vector. The mass center is associated with the new origin.

Parameters:

data - the initial mesh

scale - the scale vector (null value means autoscaling to the unit cube)

Method Detail

initialDimension

public int initialDimension()

Returns the dimension of initial space of independent varibles.

Specified by:

initialDimension in interface Reduction

reducedDimension

public int reducedDimension()

Returns the dimension of reduced space of independent varibles.

Specified by:

reducedDimension in interface Reduction

reducePoint

public void reducePoint(RealPointer x,
                        RealPointer y)

Transforms a point coordinates from initial to reduced using affine transformation y_i = s_i*(x_i-o_i).

Specified by:

reducePoint in interface Reduction

Parameters:

x - a point in initial coordinates

y - the point in reduced coordinates