videoRangePanel

Class RoundEarthMethod

java.lang.Object

videoRangePanel.VRHorzCalcMethod

videoRangePanel.RoundEarthMethod

Direct Known Subclasses:

RefractionMethod

public class RoundEarthMethod
extends VRHorzCalcMethod

Constructor Summary

Constructors

Constructor and Description
RoundEarthMethod(VRControl vrControl)

Method Summary

Methods

Modifier and Type	Method and Description
void	configure()
RangeDialogPanel	dialogPanel()
double	getAngle(double height, double range) Converts a range into an angle below the horizon.
double	getHorizonDistance(double height) Calculate the distance to the horizon from a given height.
double	getRange(double height, double angle) Converts a height and an angle below the horizon to a distance in metres.
double	psiFromRange(double height, double range) Convert a range to an angle up from the vertical (cosine rule).
double	rangeFromPsi(double height, double psi) Many calcls, including those in the refractionmethoduse the anlge from the vertical, so put that as a separate calculation.

Methods inherited from class java.lang.Object

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

Constructor Detail

RoundEarthMethod

public RoundEarthMethod(VRControl vrControl)

Method Detail

configure

public void configure()

dialogPanel

public RangeDialogPanel dialogPanel()

Specified by:

dialogPanel in class VRHorzCalcMethod

getRange

public double getRange(double height,
              double angle)

Description copied from class: VRHorzCalcMethod

Converts a height and an angle below the horizon to a distance in metres.

Specified by:

getRange in class VRHorzCalcMethod

Parameters:

height - platform height (metres)

angle - angle below the horizon (radians)

Returns:

distance in metres.

rangeFromPsi

public double rangeFromPsi(double height,
                  double psi)

Many calcls, including those in the refractionmethoduse the anlge from the vertical, so put that as a separate calculation.

Eq. 1. From Leaper and Gordon.

Specified by:

rangeFromPsi in class VRHorzCalcMethod

Parameters:

height - camera height

psi - angle up from vertical

Returns:

distance to object.

getAngle

public double getAngle(double height,
              double range)

Description copied from class: VRHorzCalcMethod

Converts a range into an angle below the horizon.

Or returns -1 if the range is beyond the horizon.

Specified by:

getAngle in class VRHorzCalcMethod

Parameters:

height - platofrm height (metres)

range - range to object.

Returns:

angle in radians.

psiFromRange

public double psiFromRange(double height,
                  double range)

Convert a range to an angle up from the vertical (cosine rule).

Specified by:

psiFromRange in class VRHorzCalcMethod

Parameters:

height - platofrm height

range - range to object

Returns:

angle in radians.

getHorizonDistance

public double getHorizonDistance(double height)

Description copied from class: VRHorzCalcMethod

Calculate the distance to the horizon from a given height.

Specified by:

getHorizonDistance in class VRHorzCalcMethod

Returns:

distnace to horizon in metres.