Region (eag HEALPIX API)

java.lang.Object
- gov.fnal.eag.healpix.Region

```
public class Region
extends java.lang.Object
```
Author:

kuropat The class represents square region on a sphere defined by raMin, raMax decMin,decMax in degrees. The dec varies from Pi/2 to -Pi/2. The ra varies from 0. inclusive to 2Pi exclusive. Negative value of ra will be corrected by adding 2Pi

Constructor Summary

Constructors
Constructor and Description

Region(double xMin, double xMax, double yMin, double yMax)
default constructor

Constructors
Constructor and Description
`Region(double xMin, double xMax, double yMin, double yMax)` default constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`double[][]`	`getPolReg()` provides polar coordinates of the region vertices
`java.util.ArrayList`	`getVertices()`
`boolean`	`inReg(double ra, double dec)` return true if the point ra,dec is inside region
`boolean`	`inRegPol(double phi, double theta)` return true if point phi, theta is inside region
`java.util.ArrayList`	`pixelize(double precision)` divides region on HealPix pixels of given size including pixels that only partly inside the region

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

- Constructor Detail
  - Region
```
public Region(double xMin,
              double xMax,
              double yMin,
              double yMax)
```
    default constructor
    
    Parameters:
    
    xMin - ra min in degrees
    
    xMax - ra max in degrees
    
    yMin - dec min in degrees
    
    yMax - dec max in degrees
- Method Detail
  - inReg
```
public boolean inReg(double ra,
                     double dec)
```
    return true if the point ra,dec is inside region
    
    Parameters:
    
    ra - in degrees
    
    dec - in degrees
    
    Returns:
    
    boolean true if inside the region
  - inRegPol
```
public boolean inRegPol(double phi,
                        double theta)
```
    return true if point phi, theta is inside region
    
    Parameters:
    
    phi - in radians
    
    theta - in radians
    
    Returns:
    
    boolean true if in region
  - getVertices
```
public java.util.ArrayList getVertices()
```
    Returns:
    
    ArrayList of 3d vectors of vertices of the region
  - pixelize
```
public java.util.ArrayList pixelize(double precision)
                             throws java.lang.Exception
```
    divides region on HealPix pixels of given size including pixels that only partly inside the region
    
    Parameters:
    
    precision - - angular size of the division element in arcsec
    
    Returns:
    
    ArrayList of pixel numbers in ring schema for specifyed resolution
    
    Throws:
    
    java.lang.Exception
  - getPolReg
```
public double[][] getPolReg()
```
    provides polar coordinates of the region vertices
    
    Returns:
    
    array of corner coordinates in form of polar thete,phi angles.

Class Region

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Region

Method Detail

inReg

inRegPol

getVertices

pixelize

getPolReg