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

Class SkyAspect

  • public class SkyAspect
extends java.lang.Object
    Defines the view of a SkySurface.
    Since:
    20 Feb 2013
    Author:
    Mark Taylor

    • Constructor Summary

      Constructors 
      Constructor Description
      SkyAspect​(double[] rotmat, double zoom, double xoff, double yoff)
      Constructor.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.Object o)  
      double getOffsetX()
      Returns the offset in the graphical X direction of the centre of the sky drawing from the centre of the available plotting region.
      double getOffsetY()
      Returns the offset in the graphical Y direction of the centre of the sky drawingn from the centre of the available plotting region.
      double[] getRotation()
      Returns rotation matrix.
      double getZoom()
      Returns zoom factor.
      int hashCode()  
      static double[] unitMatrix​(boolean reflect)
      Returns an optionally reflected unit matrix.

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • SkyAspect

        public SkyAspect​(double[] rotmat,
                 double zoom,
                 double xoff,
                 double yoff)
        Constructor.
        Parameters:
        rotmat - 9-element rotation matrix
        zoom - zoom factor; 1 means the sky is approximately the same size as plot bounds
        xoff - x offset of plot centre from plot bounds centre in dimensionless units; 0 is centred
        yoff - y offset of plot centre from plot bounds centre in dimensionless units; 0 is centred

    • Method Detail

      • getRotation

        public double[] getRotation()
        Returns rotation matrix.
        Returns:
        9-element coordinate rotation matrix

      • getZoom

        public double getZoom()
        Returns zoom factor. A value of 1 means the whole sky takes up approximately all the available plotting region.
        Returns:
        zoom factor

      • getOffsetX

        public double getOffsetX()
        Returns the offset in the graphical X direction of the centre of the sky drawing from the centre of the available plotting region. Units are dimensionless; 0 is centred.
        Returns:
        x offset

      • getOffsetY

        public double getOffsetY()
        Returns the offset in the graphical Y direction of the centre of the sky drawingn from the centre of the available plotting region. Units are dimensionless; 0 is centred.
        Returns:
        y offset

      • equals

        public boolean equals​(java.lang.Object o)
        Overrides:
        equals in class java.lang.Object

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • unitMatrix

        public static double[] unitMatrix​(boolean reflect)
        Returns an optionally reflected unit matrix.
        Parameters:
        reflect - true for reflection
        Returns:
        unit matrix, possibly reflected