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/*
* Licensed to GraphHopper GmbH under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*
* GraphHopper GmbH licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.graphhopper.util;
import static java.lang.Math.*;
/**
* Calculates the distance of two points or one point and an edge in euclidean space.
*
* @author Peter Karich
*/
public class DistanceCalc2D extends DistanceCalcEarth
{
@Override
public double calcDist( double fromY, double fromX, double toY, double toX )
{
return sqrt(calcNormalizedDist(fromY, fromX, toY, toX));
}
@Override
public double calcDenormalizedDist( double normedDist )
{
return sqrt(normedDist);
}
/**
* Returns the specified length in normalized meter.
*/
@Override
public double calcNormalizedDist( double dist )
{
return dist * dist;
}
/**
* Calculates in normalized meter
*/
@Override
public double calcNormalizedDist( double fromY, double fromX, double toY, double toX )
{
double dX = fromX - toX;
double dY = fromY - toY;
return dX * dX + dY * dY;
}
@Override
public String toString()
{
return "2D";
}
}