Package gaiasky.util.gaia.utils

Class Place

java.lang.Object
gaiasky.util.gaia.utils.Place
public class Place
extends java.lang.Object
Specifies a celestial position

  • Field Summary

    Fields
    Modifier and Type Field Description
    protected double alpha  
    protected double delta  
    protected Vector3d dirICRS  
    protected boolean haveAngles  

  • Constructor Summary

    Constructors
    Constructor Description
    Place()
    Default constructor.
    Place​(double rightAscension, double declination)
    Constructs a Place at given (alpha, delta)
    Place​(Place p)
    Duplicates a Place
    Place​(Vector3d r)
    Constructs a Place at the position given by a vector (need not be a unit vector)
    Place​(java.util.Random rnd)
    Constructs a Place at a random position

  • Method Summary

    Modifier and Type Method Description
    protected void calcAngles()
    Internal conversion from direction to (alpha, delta)
    double getAlpha()
    Returns the right ascension [rad] of the Place
    double getAngleTo​(Place p)
    Calculates the angle between this Place and another Place
    double getDelta()
    Returns the declination [rad] of the Place
    Vector3d getDirection()
    Returns the unit vector of the Place
    Place moveToRandom​(java.util.Random rnd)
    Moves the current Place to a random position
    Place moveToRandom​(java.util.Random rnd, Place centre, double radius)
    Moves the current Place to a random position within a certain radius of a given Place.
    Place setAngles​(double rightAscension, double declination)
    Sets the position of the Place to given (alpha, delta)
    Place setDirection​(Vector3d r)
    Sets the position of the Place to that of a given vector (need not be a unit vector)
    java.lang.String toString()  

    Methods inherited from class java.lang.Object

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

  • Field Details

    • dirICRS

      protected Vector3d dirICRS

    • haveAngles

      protected boolean haveAngles

    • alpha

      protected double alpha

    • delta

      protected double delta

  • Constructor Details

    • Place

      public Place()
      Default constructor. Puts the Place at (alpha, delta ) = (0, 0)

    • Place

      public Place​(Vector3d r)
      Constructs a Place at the position given by a vector (need not be a unit vector)
      Parameters:
      r - vector

    • Place

      public Place​(double rightAscension, double declination)
      Constructs a Place at given (alpha, delta)
      Parameters:
      rightAscension -
      declination -

    • Place

      public Place​(java.util.Random rnd)
      Constructs a Place at a random position
      Parameters:
      rnd - Random number generator

    • Place

      public Place​(Place p)
      Duplicates a Place
      Parameters:
      p -

  • Method Details

    • getDirection

      public Vector3d getDirection()
      Returns the unit vector of the Place
      Returns:
      vector

    • getAlpha

      public double getAlpha()
      Returns the right ascension [rad] of the Place
      Returns:
      The right ascension in radians

    • getDelta

      public double getDelta()
      Returns the declination [rad] of the Place
      Returns:
      The declination in radians

    • setAngles

      public Place setAngles​(double rightAscension, double declination)
      Sets the position of the Place to given (alpha, delta)
      Parameters:
      rightAscension -
      declination -

    • setDirection

      public Place setDirection​(Vector3d r)
      Sets the position of the Place to that of a given vector (need not be a unit vector)
      Parameters:
      r - vector

    • getAngleTo

      public double getAngleTo​(Place p)
      Calculates the angle between this Place and another Place
      Parameters:
      p - the other Place
      Returns:
      angle between them [rad]

    • toString

      public java.lang.String toString()
      Overrides:
      toString in class java.lang.Object
      See Also:
      Object.toString()

    • moveToRandom

      public Place moveToRandom​(java.util.Random rnd)
      Moves the current Place to a random position

    • moveToRandom

      public Place moveToRandom​(java.util.Random rnd, Place centre, double radius)
      Moves the current Place to a random position within a certain radius of a given Place.

    • calcAngles

      protected void calcAngles()
      Internal conversion from direction to (alpha, delta)