Package uk.ac.starlink.ttools.plot2.geom

Class SkyviewProjection

java.lang.Object
uk.ac.starlink.ttools.plot2.geom.SkyviewProjection
All Implemented Interfaces:
Projection
Direct Known Subclasses:
FixedSkyviewProjection, SinProjection
public abstract class SkyviewProjection extends Object implements Projection
Partial projection implementation based on classes from the Skyview package.
Since:
21 Feb 2013
Author:
Mark Taylor

  • Constructor Details

    • SkyviewProjection

      protected SkyviewProjection(skyview.geometry.Projecter projecter, Shape shape, String name, String description)
      Constructor.
      Parameters:
      projecter - projecter object
      shape - shape of the sky in this projection
      name - projection name
      description - projection description

  • Method Details

    • getProjectionName

      public String getProjectionName()
      Description copied from interface: Projection
      Returns the projection name.
      Specified by:
      getProjectionName in interface Projection
      Returns:
      user-directed projection name

    • getProjectionDescription

      public String getProjectionDescription()
      Description copied from interface: Projection
      Returns a short description of the projection. return projection description
      Specified by:
      getProjectionDescription in interface Projection

    • getProjectionShape

      public Shape getProjectionShape()
      Description copied from interface: Projection
      Returns the shape which encloses all the plane positions to which legal sky coordinates can be projected. Typically this has linear dimensions of the order of PI.
      Specified by:
      getProjectionShape in interface Projection
      Returns:
      projected sky shape

    • project

      public boolean project(double rx, double ry, double rz, Point2D.Double pos)
      Description copied from interface: Projection
      Transforms a sky position to a plane position.
      Specified by:
      project in interface Projection
      Parameters:
      rx - normalised 3D X coordinate
      ry - normalised 3D Y coordinate
      rz - normalised 3D Z coordinate
      pos - point object into which projected dimensionless X,Y coordinates will be written on success
      Returns:
      true if transformation succeeded

    • unproject

      public boolean unproject(Point2D.Double pos, double[] r3)
      Description copied from interface: Projection
      Transforms a plane position to a sky position.
      Specified by:
      unproject in interface Projection
      Parameters:
      pos - contains dimensionless X,Y coordinates of plane position
      r3 - 3-element array into which normalised X,Y,Z sky coordinates will be written on success
      Returns:
      true if transformation succeeded

    • getSkyviewProjecter

      public skyview.geometry.Projecter getSkyviewProjecter()
      Returns the projecter object used by this SkyviewProjection.
      Returns:
      projecter