/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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 org.apache.lucene.spatial.tier;
import org.apache.lucene.spatial.geometry.DistanceUnits;
import org.apache.lucene.spatial.geometry.FloatLatLng;
import org.apache.lucene.spatial.geometry.LatLng;
import org.apache.lucene.spatial.geometry.shape.LLRect;
import org.apache.lucene.spatial.geometry.shape.Rectangle;
/**
* <p><font color="red"><b>NOTE:</b> This API is still in
* flux and might change in incompatible ways in the next
* release.</font>
*/
public class DistanceUtils {
static DistanceUtils instance = new DistanceUtils();
public static DistanceUtils getInstance()
{
return instance;
}
public double getDistanceMi(double x1, double y1, double x2, double y2) {
return getLLMDistance(x1, y1, x2, y2);
}
/**
*
* @param x1
* @param y1
* @param miles
* @return boundary rectangle where getY/getX is top left, getMinY/getMinX is bottom right
*/
public Rectangle getBoundary (double x1, double y1, double miles) {
LLRect box = LLRect.createBox( new FloatLatLng( x1, y1 ), miles, miles );
//System.out.println("Box: "+maxX+" | "+ maxY+" | "+ minX + " | "+ minY);
return box.toRectangle();
}
public double getLLMDistance (double x1, double y1, double x2, double y2) {
LatLng p1 = new FloatLatLng( x1, y1 );
LatLng p2 = new FloatLatLng( x2, y2 );
return p1.arcDistance( p2, DistanceUnits.MILES );
}
}
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