uk.ac.starlink.ttools.plot2.geom

Class SphereAngleRange

java.lang.Object

uk.ac.starlink.ttools.plot2.geom.SphereAngleRange

public class SphereAngleRange
extends Object

Represents the range of angular coordinates that are covered by a given region.

Since:

15 Aug 2018

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
SphereAngleRange(double phiLo, double phiHi, double thetaLo, double thetaHi) Constructor.

Method Summary

Modifier and Type	Method and Description
static SphereAngleRange	calculateRange(double[] dlos, double[] dhis) Determines the angle range for a cube defined by Cartesian limits.
double[]	getPhiLimits() Returns the limits of azimuthal angle.
double[]	getThetaLimits() Returns the limits of polar angle.

Methods inherited from class java.lang.Object

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

Constructor Detail

SphereAngleRange

public SphereAngleRange(double phiLo,
                        double phiHi,
                        double thetaLo,
                        double thetaHi)

Constructor.

Parameters:

phiLo - phi lower bound

phiHi - phi upper bound

thetaLo - theta lower bound

thetaHi - theta upper bound

Method Detail

getPhiLimits

public double[] getPhiLimits()

Returns the limits of azimuthal angle. A pair of values is returned; the first is always lower than the second, but neither is guaranteed to lie within a given range.

Returns:

2-element array giving (lo, hi) limits on phi

getThetaLimits

public double[] getThetaLimits()

Returns the limits of polar angle. A pair of values is returned; the first is lower than the second, and both are in the range (-PI/2..+PI/2).

Returns:

2-element array giving (lo, hi) limits on theta

calculateRange

public static SphereAngleRange calculateRange(double[] dlos,
                                              double[] dhis)

Determines the angle range for a cube defined by Cartesian limits. Note: This code hasn't been tried or tested at all, it may contain more or less serious errors.

Parameters:

dlos - 3-element array giving cube lower bounds

dhis - 3-element array giving cube upper bounds

Returns:

angle range