HealpixImpl

All Known Implementing Classes:

Healpix
```
public interface HealpixImpl
```
HEALPix Interface wrapper for Moc usage Encapsulate the usage HEALPix The HEALPix ordering is always NESTED

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`long`	`ang2pix(int order, double lon, double lat)`	Provide the HEALPix number associated to a coord, for a given order
`double[]`	`pix2ang(int order, long npix)`	Provide the galactic coord associated to an HEALPix number, for a given order
`long[]`	`queryDisc(int order, double lon, double lat, double radius)`	Provide the list of HEALPix numbers fully covering a circle (for a specified order)

- Method Detail
  - ang2pix
```
long ang2pix(int order,
             double lon,
             double lat)
      throws java.lang.Exception
```
    Provide the HEALPix number associated to a coord, for a given order
    
    Parameters:
    
    order - HEALPix order [0..MAXORDER]
    
    lon - longitude (expressed in the Healpix frame)
    
    lat - latitude (expressed in the Healpix frame)
    
    Returns:
    
    HEALPix number
    
    Throws:
    
    java.lang.Exception
  - pix2ang
```
double[] pix2ang(int order,
                 long npix)
          throws java.lang.Exception
```
    Provide the galactic coord associated to an HEALPix number, for a given order
    
    Parameters:
    
    order - HEALPix order [0..MAXORDER]
    
    npix - HEALPix number
    
    Returns:
    
    spherical coord (lon,lat) (expressed in the Healpix frame)
    
    Throws:
    
    java.lang.Exception
  - queryDisc
```
long[] queryDisc(int order,
                 double lon,
                 double lat,
                 double radius)
          throws java.lang.Exception
```
    Provide the list of HEALPix numbers fully covering a circle (for a specified order)
    
    Parameters:
    
    order - Healpix order
    
    lon - center longitude (expressed in the Healpix frame)
    
    lat - center latitude (expressed in the Healpix frame)
    
    radius - circle radius (in degrees)
    
    Returns:
    
    Throws:
    
    java.lang.Exception