visad

Class ProjectionControl

java.lang.Object

visad.Control

visad.ProjectionControl

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

ProjectionControlJ2D, ProjectionControlJ3D

public abstract class ProjectionControl
extends Control

ProjectionControl is the VisAD interface for controlling the Projection from 3-D to 2-D.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static double	INVSCALE2D Inverse of SCALE2D
protected double[]	matrix matrix[] shouldn't be used by non-ProjectionControl classes
static int	MATRIX2D_LENGTH Length of a 2D matrix
static int	MATRIX2D_MAJOR Major dimension of the 2D matrix
static int	MATRIX2D_MINOR Minor dimension of the 2D matrix
static int	MATRIX3D_LENGTH Length of a 2D matrix
static int	MATRIX3D_MAJOR Major dimension of the 3D matrix
static int	MATRIX3D_MINOR Minor dimension of the 3D matrix
static double	SCALE2D Default scaling factor for 2D matrix

Constructor Summary

Constructors

Constructor and Description
ProjectionControl(DisplayImpl d) Construct a ProjectionControl for the display in question.

Method Summary

Modifier and Type	Method and Description
void	clearSwitches(DataRenderer re) clear all 'pairs' in switches that involve re
Object	clone() Create a clone of this ProjectionControl.
boolean	equals(Object o) Check to see if the object in question is equal to this ProjectionControl.
double[]	getAspectCartesian()
double[]	getMatrix() Returns a copy of the graphics projection matrix.
double[]	getSavedProjectionMatrix() Get the matrix that defines the saved graphics projection
String	getSaveString() Get a string that can be used to reconstruct this control later
static double[]	matrix2DTo3D(double[] matrix) Convert a 2D matrix to a 3D matrix, retaining the scale and aspect of the 2D matrix.
static double[]	matrix3DTo2D(double[] matrix) Convert a 3D matrix to a 2D matrix, retaining the scale and aspect of the 3D matrix.
static double[]	matrixDConvert(double[] matrix) Convert a 3D matrix to a 2D matrix or vice-versa, retaining the scale and aspect of the original matrix.
void	resetProjection() Restores to projection matrix at time of last saveProjection() call -- if one was made -- or to initial projection otherwise.
void	saveProjection() Saves the current display projection matrix.
abstract void	setAspect(double[] aspect) Set aspect ratio of axes
void	setAspectCartesian(double[] aspect) Set aspect ratio of axes, in ScalarMaps rather than matrix
void	setMatrix(double[] m) Set the matrix that defines the graphics projection
void	setSaveString(String save) Set the properties of this control using the specified save string
void	syncControl(Control rmt) Copy the state of a remote control to this control
String	toString() A string representation of this ProjectionControl.

Methods inherited from class visad.Control

addControlListener, animation_string, changeControl, checkTicks, getDisplay, getDisplayRenderer, getInstanceNumber, incTick, nullControl, peekTicks, removeControlListener, resetTicks, setTicks, subCheckTicks, subPeekTicks, subResetTicks, subSetTicks

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

matrix

protected double[] matrix

matrix[] shouldn't be used by non-ProjectionControl classes

MATRIX2D_LENGTH

public static final int MATRIX2D_LENGTH

Length of a 2D matrix

See Also:

Constant Field Values

MATRIX2D_MAJOR

public static final int MATRIX2D_MAJOR

Major dimension of the 2D matrix

See Also:

Constant Field Values

MATRIX2D_MINOR

public static final int MATRIX2D_MINOR

Minor dimension of the 2D matrix

See Also:

Constant Field Values

MATRIX3D_LENGTH

public static final int MATRIX3D_LENGTH

Length of a 2D matrix

See Also:

Constant Field Values

MATRIX3D_MAJOR

public static final int MATRIX3D_MAJOR

Major dimension of the 3D matrix

See Also:

Constant Field Values

MATRIX3D_MINOR

public static final int MATRIX3D_MINOR

Minor dimension of the 3D matrix

See Also:

Constant Field Values

SCALE2D

public static final double SCALE2D

Default scaling factor for 2D matrix

See Also:

Constant Field Values

INVSCALE2D

public static final double INVSCALE2D

Inverse of SCALE2D

See Also:

Constant Field Values

Constructor Detail

ProjectionControl

public ProjectionControl(DisplayImpl d)
                  throws VisADException

Construct a ProjectionControl for the display in question.

Parameters:

d - display to control

Throws:

VisADException - d already has a ProjectionControl or some other VisAD Error

Method Detail

getMatrix

public double[] getMatrix()

Returns a copy of the graphics projection matrix. The matrix has 6 elements in the 2-D case and 16 elements in the 3-D case.

Returns:

A copy of the graphics projection matrix.

setMatrix

public void setMatrix(double[] m)
               throws VisADException,
                      RemoteException

Set the matrix that defines the graphics projection

Parameters:

m - array of the matrix values (16 elements in Java3D case, 6 elements in Java2D case)

Throws:

VisADException - invalid matrix length

RemoteException - Java RMI failure.

getSaveString

public String getSaveString()

Get a string that can be used to reconstruct this control later

Specified by:

getSaveString in class Control

Returns:

String representation of this object that can be used for reconstruction.

setSaveString

public void setSaveString(String save)
                   throws VisADException,
                          RemoteException

Set the properties of this control using the specified save string

Specified by:

setSaveString in class Control

Parameters:

save - String to use for setting the properties.

Throws:

VisADException - VisAD failure.

RemoteException - Java RMI failure.

setAspect

public abstract void setAspect(double[] aspect)
                        throws VisADException,
                               RemoteException

Set aspect ratio of axes

Parameters:

aspect - ratios; 3 elements for Java3D, 2 for Java2D

Throws:

VisADException - VisAD failure.

RemoteException - Java RMI failure.

setAspectCartesian

public void setAspectCartesian(double[] aspect)
                        throws VisADException,
                               RemoteException

Set aspect ratio of axes, in ScalarMaps rather than matrix

Parameters:

aspect - ratios; 3 elements for Java3D, 2 for Java2D

Throws:

VisADException - VisAD failure.

RemoteException - Java RMI failure.

getAspectCartesian

public double[] getAspectCartesian()

saveProjection

public void saveProjection()

Saves the current display projection matrix. The projection may later be restored by the method resetProjection().

See Also:

resetProjection()

getSavedProjectionMatrix

public double[] getSavedProjectionMatrix()

Get the matrix that defines the saved graphics projection

Returns:

array of the matrix values (16 elements in Java3D case, 6 elements in Java2D case)

resetProjection

public void resetProjection()
                     throws VisADException,
                            RemoteException

Restores to projection matrix at time of last saveProjection() call -- if one was made -- or to initial projection otherwise.

Throws:

VisADException - VisAD failure.

RemoteException - Java RMI failure.

See Also:

saveProjection()

matrix2DTo3D

public static double[] matrix2DTo3D(double[] matrix)
                             throws VisADException

Convert a 2D matrix to a 3D matrix, retaining the scale and aspect of the 2D matrix.

Parameters:

matrix - 2D matrix to convert

Throws:

VisADException - wrong length for matrix (not MATRIX2D_LENGTH)

matrix3DTo2D

public static double[] matrix3DTo2D(double[] matrix)
                             throws VisADException

Convert a 3D matrix to a 2D matrix, retaining the scale and aspect of the 3D matrix.

Parameters:

matrix - 3D matrix to convert

Throws:

VisADException - wrong length for matrix (not MATRIX3D_LENGTH)

matrixDConvert

public static double[] matrixDConvert(double[] matrix)
                               throws VisADException

Convert a 3D matrix to a 2D matrix or vice-versa, retaining the scale and aspect of the original matrix. Helper interface to pass an unknown matrix to matrix3DTo2D or matrix2DTo3D.

Parameters:

matrix - matrix to convert

Throws:

VisADException - wrong length for matrix (not MATRIX3D_LENGTH)

See Also:

matrix3DTo2D(double[]), matrix2DTo3D(double[])

clearSwitches

public void clearSwitches(DataRenderer re)

clear all 'pairs' in switches that involve re

syncControl

public void syncControl(Control rmt)
                 throws VisADException

Copy the state of a remote control to this control

Specified by:

syncControl in class Control

Parameters:

rmt - remote control

Throws:

VisADException - rmt is null or not a ProjectionControl or some other VisAD error

equals

public boolean equals(Object o)

Check to see if the object in question is equal to this ProjectionControl. The two are equal if they are both ProjectionControls and their projection matrices are equal.

Overrides:

equals in class Control

Parameters:

o - object in question.

Returns:

true if and only if this instance is equal to o

clone

public Object clone()

Create a clone of this ProjectionControl.

Overrides:

clone in class Control

Returns:

clone

toString

public String toString()

A string representation of this ProjectionControl.

Overrides:

toString in class Control

Returns:

human readable string that tells the properties of this control.