Class Ait

java.lang.Object
All Implemented Interfaces:
java.io.Serializable, Component

public class Ait
extends Projecter
This class implements the AIT (Hammer-Aitov) projection. This version uses only the Math.sqrt function without any calls to trigonometric functions.
See Also:
Serialized Form
  • Nested Class Summary

    Nested Classes 
    Modifier and Type Class Description
    class  Ait.AitDeproj  
  • Constructor Summary

    Constructors 
    Constructor Description
    Ait()  
  • Method Summary

    Modifier and Type Method Description
    static void forwardTransform​(double[] sphere, double[] plane)  
    java.lang.String getDescription()
    A description of the component
    java.lang.String getName()
    The name of the Component
    Deprojecter inverse()
    Get the associated deprojecter
    boolean isInverse​(Transformer trans)
    Is this the inverse of another transformation?
    static void main​(java.lang.String[] args)  
    static void reverseTransform​(double[] plane, double[] sphere)  
    double[] shadowPoint​(double x, double y)
    Find the shadow point for the given element.
    boolean straddle​(double[][] pnts)
    Does this figure straddle the boundary.
    boolean straddleable()
    Is it possible for a pixel to straddle the valid region.
    double[][][] straddleComponents​(double[][] input)
    Get the straddle regions from a given set.
    void transform​(double[] sphere, double[] plane)
    Convert a single point where the output vector is supplied.
    boolean validPosition​(double[] plane)
    Is this a valid position in the projection plane for this image.

    Methods inherited from class skyview.geometry.Projecter

    allValid, getInputDimension, getOutputDimension, getXTiling, getYTiling, tissot

    Methods inherited from class skyview.geometry.Transformer

    transform, transform

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • Ait

      public Ait()
  • Method Details

    • getName

      public java.lang.String getName()
      The name of the Component
    • getDescription

      public java.lang.String getDescription()
      A description of the component
    • inverse

      public Deprojecter inverse()
      Get the associated deprojecter
      Specified by:
      inverse in class Projecter
    • isInverse

      public boolean isInverse​(Transformer trans)
      Is this the inverse of another transformation?
      Specified by:
      isInverse in class Transformer
    • transform

      public final void transform​(double[] sphere, double[] plane)
      Description copied from class: Transformer
      Convert a single point where the output vector is supplied.
      Specified by:
      transform in class Transformer
      Parameters:
      sphere - The input vector.
      plane - The output vector, it may be the same as the input vector if the dimensionalities are the same. All transformers are expected to work with aliased inputs and output.
    • forwardTransform

      public static void forwardTransform​(double[] sphere, double[] plane)
    • reverseTransform

      public static void reverseTransform​(double[] plane, double[] sphere)
    • validPosition

      public boolean validPosition​(double[] plane)
      Description copied from class: Projecter
      Is this a valid position in the projection plane for this image. This default is appropriate for all projections where the projection plane is infinite.
      Overrides:
      validPosition in class Projecter
    • straddleable

      public boolean straddleable()
      Description copied from class: Projecter
      Is it possible for a pixel to straddle the valid region.
      Overrides:
      straddleable in class Projecter
    • straddle

      public boolean straddle​(double[][] pnts)
      Does this figure straddle the boundary.
      Overrides:
      straddle in class Projecter
    • shadowPoint

      public double[] shadowPoint​(double x, double y)
      Find the shadow point for the given element.
      Overrides:
      shadowPoint in class Projecter
    • straddleComponents

      public double[][][] straddleComponents​(double[][] input)
      Get the straddle regions from a given set. We don't truncate the at the boundaries of the ellipse. We can probably calulate this (i.e., by looking to see if each component crosses the ellipse boundary) but invalid pixels should be handled by the validPosition check. It seems unlikely that anyone is handling this boundary perfectly...
      Overrides:
      straddleComponents in class Projecter
    • main

      public static void main​(java.lang.String[] args)