skyview.geometry.projecter

Class Tan

java.lang.Object

skyview.geometry.Transformer

skyview.geometry.Projecter

skyview.geometry.projecter.Tan

All Implemented Interfaces:

java.io.Serializable, Component

Direct Known Subclasses:

Xtn

public class Tan
extends Projecter

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Tan.TanDeproj

Constructor Summary

Constructors

Constructor and Description
Tan()

Method Summary

Modifier and Type	Method and Description
boolean	allValid() The entire projection plane is valid
java.lang.String	getDescription() Get a description of the component
java.lang.String	getName() Get the name of the compontent
Deprojecter	inverse() Get the inverse transformation
boolean	isInverse(Transformer t) Is this an inverse of some other transformation?
double[]	tissot(double x, double y) Get the Tissot parameters.
void	transform(double[] sphere, double[] plane) Project a point from the sphere to the plane.

Methods inherited from class skyview.geometry.Projecter

getInputDimension, getOutputDimension, getXTiling, getYTiling, shadowPoint, straddle, straddleable, straddleComponents, validPosition

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 Detail

Tan

public Tan()

Method Detail

getName

public java.lang.String getName()

Get the name of the compontent

getDescription

public java.lang.String getDescription()

Get a description of the component

allValid

public boolean allValid()

The entire projection plane is valid

Overrides:

allValid in class Projecter

transform

public final void transform(double[] sphere,
                            double[] plane)

Project a point from the sphere to the plane.

Specified by:

transform in class Transformer

Parameters:

sphere - a double[3] unit vector

plane - a double[2] preallocated vector.

inverse

public Deprojecter inverse()

Get the inverse transformation

Specified by:

inverse in class Projecter

isInverse

public boolean isInverse(Transformer t)

Is this an inverse of some other transformation?

Specified by:

isInverse in class Transformer

tissot

public double[] tissot(double x,
                       double y)

Get the Tissot parameters.

Overrides:

tissot in class Projecter

Parameters:

x - The X-value at which the Tissot indicatrix is to be calculated.

y - The Y-value at which the Tissot indicatrix is to be calculated.

Returns:

A three element double vector [Semimajor, semiminor, position angle] with the axes size and positional angle of the ellipse.