SkyAspect (Starjava TTOOLS API)

java.lang.Object
- uk.ac.starlink.ttools.plot2.geom.SkyAspect

```
public class SkyAspect
extends java.lang.Object
```
Defines the view of a SkySurface.

Since:

20 Feb 2013

Author:

Mark Taylor

Constructor Summary

Constructors
Constructor and Description
`SkyAspect(Projection projection, boolean reflect)` Constructs a default aspect from a given projection.
`SkyAspect(Projection projection, double[] rotmat, double zoom, double xoff, double yoff)` Constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(java.lang.Object o)`
`double`	`getOffsetX()` Returns the offset in the graphical X direction of the centre of the sky drawing from the centre of the available plotting region.
`double`	`getOffsetY()` Returns the offset in the graphical Y direction of the centre of the sky drawingn from the centre of the available plotting region.
`Projection`	`getProjection()` Returns sky projection.
`static Projection[]`	`getProjections()` Returns known projection options.
`double[]`	`getRotation()` Returns rotation matrix.
`double`	`getZoom()` Returns zoom factor.
`int`	`hashCode()`
`boolean`	`isReflected()` Indicates whether the rotation matrix includes a reflection.
`static double[]`	`unitMatrix(boolean reflect)` Returns an optionally reflected unit matrix.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SkyAspect
```
public SkyAspect(Projection projection,
                 double[] rotmat,
                 double zoom,
                 double xoff,
                 double yoff)
```
    Constructor.
    
    Parameters:
    
    projection - sky projection
    
    rotmat - 9-element rotation matrix
    
    zoom - zoom factor; 1 means the sky is approximately the same size as plot bounds
    
    xoff - x offset of plot centre from plot bounds centre in dimensionless units; 0 is centred
    
    yoff - y offset of plot centre from plot bounds centre in dimensionless units; 0 is centred
  - SkyAspect
```
public SkyAspect(Projection projection,
                 boolean reflect)
```
    Constructs a default aspect from a given projection.
    
    Parameters:
    
    projection - sky projection
    
    reflect - whether longitude runs right to left
- Method Detail
  - getProjection
```
public Projection getProjection()
```
    Returns sky projection.
    
    Returns:
    
    projection
  - getRotation
```
public double[] getRotation()
```
    Returns rotation matrix.
    
    Returns:
    
    9-element coordinate rotation matrix
  - getZoom
```
public double getZoom()
```
    Returns zoom factor. A value of 1 means the whole sky takes up approximately all the available plotting region.
    
    Returns:
    
    zoom factor
  - getOffsetX
```
public double getOffsetX()
```
    Returns the offset in the graphical X direction of the centre of the sky drawing from the centre of the available plotting region. Units are dimensionless; 0 is centred.
    
    Returns:
    
    x offset
  - getOffsetY
```
public double getOffsetY()
```
    Returns the offset in the graphical Y direction of the centre of the sky drawingn from the centre of the available plotting region. Units are dimensionless; 0 is centred.
    
    Returns:
    
    y offset
  - isReflected
```
public boolean isReflected()
```
    Indicates whether the rotation matrix includes a reflection.
    
    Returns:
    
    true iff longitude runs right to left (or equivalent)
  - equals
```
public boolean equals(java.lang.Object o)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - getProjections
```
public static Projection[] getProjections()
```
    Returns known projection options.
    
    Returns:
    
    list of available projections
  - unitMatrix
```
public static double[] unitMatrix(boolean reflect)
```
    Returns an optionally reflected unit matrix.
    
    Parameters:
    
    reflect - true for reflection
    
    Returns:
    
    unit matrix, possibly reflected

Class SkyAspect

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SkyAspect

SkyAspect

Method Detail

getProjection

getRotation

getZoom

getOffsetX

getOffsetY

isReflected

equals

hashCode

getProjections

unitMatrix