Package healpix.essentials

Class Moc

java.lang.Object
healpix.essentials.Moc
public class Moc extends Object
Support for MOC algorithms.
Author:
Martin Reinecke
Copyright:
2014-2015 Max-Planck-Society

  • Constructor Details

    • Moc

      public Moc()
      Creates a new, empty Moc.

    • Moc

      public Moc(Moc other)
      Creates a new Moc, which is identical to "other".

    • Moc

      public Moc(RangeSet rs2, int order)
      Creates a new Moc from the range set of NESTED pixels at the given order.

  • Method Details

    • getRangeSet

      public RangeSet getRangeSet()
      Returns the internal range set.

    • maxOrder

      public int maxOrder()
      Returns the maximum HEALPix order necessary to describe the Moc exactly.

    • degradedToOrder

      public Moc degradedToOrder(int order, boolean keepPartialCells)
      Returns a Moc with degraded resolution.
      Parameters:
      order - the maximum HEALPix order used for the result
      keepPartialCells - if true, partially filled cells will be included in the output Moc; if false, they will be ignored.

    • addPixelRange

      public void addPixelRange(int order, long p1, long p2)
      Adds a range of pixels at a given HEALPix order to the Moc.
      Parameters:
      order - the HEALPix order of the added pixels
      p1 - the first pixel of the range
      p2 - the one-after-last pixel of the range

    • addPixel

      public void addPixel(int order, long p)

    • union

      public Moc union(Moc other)
      Returns a new Moc that contains the union of this Moc and "other".

    • intersection

      public Moc intersection(Moc other)
      Returns a new Moc that contains the intersection of this Moc and "other".

    • subtraction

      public Moc subtraction(Moc other)
      Returns a new Moc that contains all parts of this Moc that are not contained in "other".

    • complement

      public Moc complement()
      Returns the complement of this Moc.

    • contains

      public boolean contains(Moc other)
      Returns:
      true, if "other" is a subset of this Moc, else false.

    • overlaps

      public boolean overlaps(Moc other)
      Returns:
      true, if the intersection of this Moc and "other" is not empty.

    • toUniqRS

      public RangeSet toUniqRS()
      Returns:
      A RangeSet containing all HEALPix pixels (in NUNIQ order) covered by this Moc. The result is well-formed in the sense that every pixel is given at its lowest possible HEALPix order.

    • toUniq

      public long[] toUniq()

    • fromUniqRS

      public static Moc fromUniqRS(RangeSet ru)
      Returns:
      A Moc built from the RangeSet of NUNIQ HEALPix pixels given in "ru". "ru" need not be well-formed.

    • fromUniq

      public static Moc fromUniq(long[] u)

    • toCompressed

      public byte[] toCompressed() throws Exception
      Returns:
      A compressed representation of the Moc obtained by interpolative coding.
      Throws:
      Exception

    • fromCompressed

      public static Moc fromCompressed(byte[] data) throws Exception
      Returns:
      A Moc built from the compressed representation given in "data".
      Throws:
      Exception

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • nranges

      public int nranges()