jsky.coords

Class ImageCoords

java.lang.Object

jsky.coords.ImageCoords

All Implemented Interfaces:

Serializable, Coordinates

public class ImageCoords
extends Object
implements Coordinates, Serializable

Class representing world coordinates (right-ascension, ylination, stored as J2000 internally).

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected double	x The X coordinate
protected double	y The Y coordinate

Constructor Summary

Constructors

Constructor and Description
ImageCoords() Default constructor: initialize null coordinates.
ImageCoords(double x, double y) Initialize from x and y.
ImageCoords(Double x, Double y) Initialize from x and y.
ImageCoords(String x, String y)

Method Summary

Modifier and Type	Method and Description
ImageCoords[]	box(double radius) Given a radius, return an array {pos1, pos2} with the 2 endpoints that form a box with center at "this" position.
double[]	center(ImageCoords pos1, ImageCoords pos2) Given the endpoints of a box (pos1, pos2), return an array containing the center pos, as well as the width, height, and radius of the box.
double	dist(Coordinates pos) Return the distance between this position and the given one.
static double	dist(double x0, double y0, double x1, double y1) Return the distance between the two points.
double	dist(ImageCoords pos) Return the distance between this position and the given one.
String	getCoordinateSystemName() Returns the name of the coordinate system as a string.
double	getX() return the X value
double	getY() return the Y value
static void	main(String[] args) Test cases
String	toString() Return the coordinates as a string in h:m:s [+-]d:m:s format

Methods inherited from class java.lang.Object

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

Field Detail

x

protected double x

The X coordinate

y

protected double y

The Y coordinate

Constructor Detail

ImageCoords

public ImageCoords()

Default constructor: initialize null coordinates.

ImageCoords

public ImageCoords(double x,
                   double y)

Initialize from x and y.

Parameters:

x - The X coordinate

y - The Y coordinate

ImageCoords

public ImageCoords(Double x,
                   Double y)

Initialize from x and y.

Parameters:

x - The X coordinate

y - The Y coordinate

ImageCoords

public ImageCoords(String x,
                   String y)

Method Detail

getX

public double getX()

return the X value

Specified by:

getX in interface Coordinates

getY

public double getY()

return the Y value

Specified by:

getY in interface Coordinates

toString

public String toString()

Return the coordinates as a string in h:m:s [+-]d:m:s format

Specified by:

toString in interface Coordinates

Overrides:

toString in class Object

dist

public static double dist(double x0,
                          double y0,
                          double x1,
                          double y1)

Return the distance between the two points.

Parameters:

x0 - The X coordinate of the first point

y0 - The Y coordinate of the first point

x1 - The X coordinate of the second point

y1 - The Y coordinate of the second point

Returns:

The distance between the two points.

dist

public double dist(ImageCoords pos)

Return the distance between this position and the given one.

Parameters:

pos - The other point.

Returns:

The distance to the given point.

dist

public double dist(Coordinates pos)

Return the distance between this position and the given one.

Specified by:

dist in interface Coordinates

Parameters:

pos - The other point.

Returns:

The distance to the given point.

box

public ImageCoords[] box(double radius)

Given a radius, return an array {pos1, pos2} with the 2 endpoints that form a box with center at "this" position.

Parameters:

radius - The radius.

Returns:

Array of 2 ImageCoords objects that are the endpoints of a box with the given radius and centered at "this" position.

center

public double[] center(ImageCoords pos1,
                       ImageCoords pos2)

Given the endpoints of a box (pos1, pos2), return an array containing the center pos, as well as the width, height, and radius of the box.

Parameters:

pos1 - The first endpoint of the box.

pos1 - The second endpoint of the box.

Returns:

An array of 5 doubles: {x, y, width, height, radius} where (x, y) gives the center position, width and height are the size of the box, and radius is the distance from the center to a corner.

getCoordinateSystemName

public String getCoordinateSystemName()

Returns the name of the coordinate system as a string.

Specified by:

getCoordinateSystemName in interface Coordinates

main

public static void main(String[] args)

Test cases