videoRangePanel
Class RoundEarthMethod

java.lang.Object
  videoRangePanel.VRRangeMethod
      videoRangePanel.RoundEarthMethod

Direct Known Subclasses:

RefractionMethod

public class RoundEarthMethod
extends VRRangeMethod

Field Summary

protected VRControl

vrControl

Fields inherited from class videoRangePanel.VRRangeMethod

earthRadius, gravity

Constructor Summary

RoundEarthMethod(VRControl vrControl)

Method Summary

void	configure()
RangeDialogPanel	dialogPanel()
(package private) 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.
(package private) java.lang.String	getName()
double	getRange(double height, double angle) Converts a height and an angle below the horizon to a distance in metres.
protected double	psiFromRange(double height, double range) Convert a range to an angle up from the vertical (cosine rule).
protected 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 videoRangePanel.VRRangeMethod

getHorizonAngle

Methods inherited from class java.lang.Object

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

Field Detail

vrControl

protected VRControl vrControl

Constructor Detail

RoundEarthMethod

public RoundEarthMethod(VRControl vrControl)

Method Detail

configure

public void configure()

Specified by:

configure in class VRRangeMethod

dialogPanel

public RangeDialogPanel dialogPanel()

Specified by:

dialogPanel in class VRRangeMethod

getRange

public double getRange(double height,
                       double angle)

Description copied from class: VRRangeMethod

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

Specified by:

getRange in class VRRangeMethod

Parameters:

height - platform height (metres)

angle - angle below the horizon (radians)

Returns:

distance in metres.

rangeFromPsi

protected 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.

Parameters:

height - camera height

psi - angle up from vertical

Returns:

distance to object.

getAngle

double getAngle(double height,
                double range)

Description copied from class: VRRangeMethod

Converts a range into an angle below the horizon.

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

Specified by:

getAngle in class VRRangeMethod

Parameters:

height - platofrm height (metres)

range - range to object.

Returns:

angle in radians.

psiFromRange

protected double psiFromRange(double height,
                              double range)

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

Parameters:

height - platofrm height

range - range to object

Returns:

angle in radians.

getName

java.lang.String getName()

Specified by:

getName in class VRRangeMethod

getHorizonDistance

public double getHorizonDistance(double height)

Description copied from class: VRRangeMethod

Calculate the distance to the horizon from a given height.

Specified by:

getHorizonDistance in class VRRangeMethod

Returns:

distnace to horizon in metres.