Package elki.visualization.projections

Class AffineProjection

java.lang.Object

elki.visualization.projections.AbstractProjection

elki.visualization.projections.AbstractFullProjection

elki.visualization.projections.AffineProjection

All Implemented Interfaces:

FullProjection, Projection, Projection2D, VisualizationItem

public class AffineProjection
extends AbstractFullProjection
implements Projection2D

Affine projections are the most general class. They are initialized by an arbitrary affine transformation matrix, and can thus represent any rotation and scaling, even simple perspective projections. However, this comes at the cost of a matrix multiplication.

Since:

0.3

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field	Description
private AffineTransformation	proj	Affine transformation used in projection
private CanvasSize	viewport	Viewport (cache)

Fields inherited from class elki.visualization.projections.AbstractProjection

scales

Fields inherited from interface elki.visualization.projections.Projection

INVSCALE, SCALE

Constructor Summary

Constructors

Constructor	Description
AffineProjection(Projector p, LinearScale[] scales, AffineTransformation proj)	Constructor with a given database and axes.

Method Summary

Modifier and Type	Method	Description
static AffineTransformation	axisProjection(int dim, int ax1, int ax2)	Compute an transformation matrix to show only axis ax1 and ax2.
CanvasSize	estimateViewport()	Estimate the viewport requirements
double[]	fastProjectDataToRenderSpace(double[] data)	Project a data vector from data space to rendering space.
double[]	fastProjectDataToRenderSpace(NumberVector data)	Project a data vector from data space to rendering space.
double[]	fastProjectDataToScaledSpace(double[] data)	Project a data vector from data space to scaled space.
double[]	fastProjectDataToScaledSpace(NumberVector data)	Project a data vector from data space to scaled space.
double[]	fastProjectRelativeDataToRenderSpace(double[] data)	Project a data vector from data space to rendering space.
double[]	fastProjectRelativeDataToRenderSpace(NumberVector data)	Project a data vector from data space to rendering space.
double[]	fastProjectRelativeScaledToRenderSpace(double[] vr)	Project a vector from scaled space to rendering space.
double[]	fastProjectRenderToDataSpace(double x, double y)	Project a data vector from rendering space to data space.
double[]	fastProjectRenderToScaledSpace(double x, double y)	Project a vector from rendering space to scaled space.
double[]	fastProjectScaledToRenderSpace(double[] vr)	Project a vector from scaled space to rendering space.
long[]	getVisibleDimensions2D()	Get a bit set of dimensions that are visible.
double[]	projectRelativeRenderToScaled(double[] v)	Project a relative vector from rendering space to scaled space.
double[]	projectRelativeScaledToRender(double[] v)	Project a relative vector from scaled space to rendering space.
double[]	projectRenderToScaled(double[] v)	Project a vector from rendering space to scaled space.
double[]	projectScaledToRender(double[] v)	Project a vector from scaled space to rendering space.

Methods inherited from class elki.visualization.projections.AbstractFullProjection

projectDataToRenderSpace, projectDataToRenderSpace, projectDataToScaledSpace, projectDataToScaledSpace, projectRelativeDataToRenderSpace, projectRelativeDataToRenderSpace, projectRelativeDataToScaledSpace, projectRelativeDataToScaledSpace, projectRelativeRenderToDataSpace, projectRelativeScaledToDataSpace, projectRenderToDataSpace, projectScaledToDataSpace

Methods inherited from class elki.visualization.projections.AbstractProjection

getInputDimensionality, getMenuName, getProjector, getScale

Methods inherited from class java.lang.Object

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

Methods inherited from interface elki.visualization.projections.Projection

getInputDimensionality, getProjector, getScale

Methods inherited from interface elki.visualization.VisualizationItem

getMenuName

Field Detail

proj

private AffineTransformation proj

Affine transformation used in projection

viewport

private CanvasSize viewport

Viewport (cache)

Constructor Detail

AffineProjection

public AffineProjection(Projector p,
                        LinearScale[] scales,
                        AffineTransformation proj)

Constructor with a given database and axes.

Parameters:

p - Projector

scales - Scales to use

proj - Projection to use

Method Detail

projectScaledToRender

public double[] projectScaledToRender(double[] v)

Project a vector from scaled space to rendering space.

Specified by:

projectScaledToRender in interface FullProjection

Parameters:

v - vector in scaled space

Returns:

vector in rendering space

projectRenderToScaled

public double[] projectRenderToScaled(double[] v)

Project a vector from rendering space to scaled space.

Specified by:

projectRenderToScaled in interface FullProjection

Parameters:

v - vector in rendering space

Returns:

vector in scaled space

projectRelativeScaledToRender

public double[] projectRelativeScaledToRender(double[] v)

Project a relative vector from scaled space to rendering space.

Specified by:

projectRelativeScaledToRender in interface FullProjection

Parameters:

v - relative vector in scaled space

Returns:

relative vector in rendering space

projectRelativeRenderToScaled

public double[] projectRelativeRenderToScaled(double[] v)

Project a relative vector from rendering space to scaled space.

Specified by:

projectRelativeRenderToScaled in interface FullProjection

Parameters:

v - relative vector in rendering space

Returns:

relative vector in scaled space

estimateViewport

public CanvasSize estimateViewport()

Description copied from interface: Projection2D

Estimate the viewport requirements

Specified by:

estimateViewport in interface Projection2D

Returns:

Canvas size obtained from projecting scale endpoints

axisProjection

public static AffineTransformation axisProjection(int dim,
                                                  int ax1,
                                                  int ax2)

Compute an transformation matrix to show only axis ax1 and ax2.

Parameters:

dim - Dimensionality

ax1 - First axis

ax2 - Second axis

Returns:

transformation matrix

fastProjectDataToRenderSpace

public double[] fastProjectDataToRenderSpace(double[] data)

Description copied from interface: Projection2D

Project a data vector from data space to rendering space.

Specified by:

fastProjectDataToRenderSpace in interface Projection2D

Parameters:

data - vector in data space

Returns:

vector in rendering space

fastProjectDataToRenderSpace

public double[] fastProjectDataToRenderSpace(NumberVector data)

Description copied from interface: Projection2D

Project a data vector from data space to rendering space.

Specified by:

fastProjectDataToRenderSpace in interface Projection2D

Parameters:

data - vector in data space

Returns:

vector in rendering space

fastProjectDataToScaledSpace

public double[] fastProjectDataToScaledSpace(double[] data)

Description copied from interface: Projection2D

Project a data vector from data space to scaled space.

Specified by:

fastProjectDataToScaledSpace in interface Projection2D

Parameters:

data - vector in data space

Returns:

vector in scaled space

fastProjectDataToScaledSpace

public double[] fastProjectDataToScaledSpace(NumberVector data)

Description copied from interface: Projection2D

Project a data vector from data space to scaled space.

Specified by:

fastProjectDataToScaledSpace in interface Projection2D

Parameters:

data - vector in data space

Returns:

vector in scaled space

fastProjectScaledToRenderSpace

public double[] fastProjectScaledToRenderSpace(double[] vr)

Description copied from interface: Projection2D

Project a vector from scaled space to rendering space.

Specified by:

fastProjectScaledToRenderSpace in interface Projection2D

Parameters:

vr - vector in scaled space

Returns:

vector in rendering space

fastProjectRelativeDataToRenderSpace

public double[] fastProjectRelativeDataToRenderSpace(double[] data)

Description copied from interface: Projection2D

Project a data vector from data space to rendering space.

Specified by:

fastProjectRelativeDataToRenderSpace in interface Projection2D

Parameters:

data - vector in data space

Returns:

vector in rendering space

fastProjectRelativeDataToRenderSpace

public double[] fastProjectRelativeDataToRenderSpace(NumberVector data)

Description copied from interface: Projection2D

Project a data vector from data space to rendering space.

Specified by:

fastProjectRelativeDataToRenderSpace in interface Projection2D

Parameters:

data - vector in data space

Returns:

vector in rendering space

fastProjectRelativeScaledToRenderSpace

public double[] fastProjectRelativeScaledToRenderSpace(double[] vr)

Description copied from interface: Projection2D

Project a vector from scaled space to rendering space.

Specified by:

fastProjectRelativeScaledToRenderSpace in interface Projection2D

Parameters:

vr - vector in scaled space

Returns:

vector in rendering space

fastProjectRenderToDataSpace

public double[] fastProjectRenderToDataSpace(double x,
                                             double y)

Description copied from interface: Projection2D

Project a data vector from rendering space to data space.

Specified by:

fastProjectRenderToDataSpace in interface Projection2D

Parameters:

x - X coordinate

y - Y coordinate

Returns:

vector in data space

fastProjectRenderToScaledSpace

public double[] fastProjectRenderToScaledSpace(double x,
                                               double y)

Description copied from interface: Projection2D

Project a vector from rendering space to scaled space.

Specified by:

fastProjectRenderToScaledSpace in interface Projection2D

Parameters:

x - X coordinate

y - Y coordinate

Returns:

vector in scaled space

getVisibleDimensions2D

public long[] getVisibleDimensions2D()

Description copied from interface: Projection2D

Get a bit set of dimensions that are visible.

Specified by:

getVisibleDimensions2D in interface Projection2D

Returns:

Bit set, first dimension is bit 0.