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package tim.prune.data;
import tim.prune.config.Config;
/**
* Class to provide distance constants and functions
*/
public abstract class Distance
{
// Geographical constants
/** Earth radius in metres */
private static final double EARTH_RADIUS_M = 6372795.0;
/**
* Convert the given angle in radians into a distance
* @param inAngDist angular distance in radians
* @return distance in currently configured distance units
*/
public static double convertRadiansToDistance(double inAngDist)
{
return convertRadiansToDistance(inAngDist, Config.getUnitSet().getDistanceUnit());
}
/**
* Convert the given angle in radians into a distance
* @param inAngDist angular distance in radians
* @param inUnit distance units
* @return distance in specified distance units
*/
public static double convertRadiansToDistance(double inAngDist, Unit inUnit)
{
// Multiply by appropriate factor
return inAngDist * EARTH_RADIUS_M * inUnit.getMultFactorFromStd();
}
/**
* Convert the given distance into an angle in radians
* @param inDist distance to convert in the current distance units
* @return angular distance in radians
*/
public static double convertDistanceToRadians(double inDist)
{
return convertDistanceToRadians(inDist, Config.getUnitSet().getDistanceUnit());
}
/**
* Convert the given distance into an angle in radians
* @param inDist distance to convert in the current distance units
* @param inUnit distance unit
* @return angular distance in radians
*/
public static double convertDistanceToRadians(double inDist, Unit inUnit)
{
// Divide by appropriate factor
return inDist / EARTH_RADIUS_M / inUnit.getMultFactorFromStd();
}
}
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