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

Class SkyviewProjection

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

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected SkyviewProjection​(skyview.geometry.Projecter projecter, java.awt.Shape shape, java.lang.String name, java.lang.String description)
      Constructor.

    • Constructor Detail

      • SkyviewProjection

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

    • Method Detail

      • getProjectionName

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

      • getProjectionDescription

        public java.lang.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 java.awt.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,
                       java.awt.geom.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​(java.awt.geom.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