+++ /dev/null
-/**
- * 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.geometry.shape;
-
-import org.apache.lucene.spatial.geometry.FloatLatLng;
-import org.apache.lucene.spatial.geometry.LatLng;
-
-
-
-/**
- * Lat-long rect. Instances are mutable.
- *
- * <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 LLRect {
- private LatLng ll, ur;
-
- public LLRect(LatLng ll, LatLng ur) {
- this.ll=ll;
- this.ur=ur;
- }
-
- public LLRect(LLRect other) {
- this.ll=other.ll;
- this.ur=other.ur;
- }
-
- /**
- * Return the area in units of lat-lng squared. This is a contrived unit
- * that only has value when comparing to something else.
- */
- public double area() {
- return Math.abs((ll.getLat()-ur.getLat()) * (ll.getLng()-ur.getLng()));
- }
-
- public LatLng getLowerLeft() {
- return ll;
- }
-
- public LatLng getUpperRight() {
- return ur;
- }
-
- @Override
- public String toString() {
- return "{" + ll + ", " + ur + "}";
- }
-
- public LatLng getMidpoint() {
- return ll.calculateMidpoint(ur);
- }
-
- /**
- * Approximates a box centered at the given point with the given width and height in miles.
- * @param center
- * @param widthMi
- * @param heightMi
- */
- public static LLRect createBox(LatLng center, double widthMi, double heightMi) {
- double d = widthMi;
- LatLng ur = boxCorners(center, d, 45.0); // assume right angles
- LatLng ll = boxCorners(center, d, 225.0);
-
- //System.err.println("boxCorners: ur " + ur.getLat() + ',' + ur.getLng());
- //System.err.println("boxCorners: cnt " + center.getLat() + ',' + center.getLng());
- //System.err.println("boxCorners: ll " + ll.getLat() + ',' + ll.getLng());
- return new LLRect(ll, ur);
- }
-
- /**
- * Returns a rectangle shape for the bounding box
- */
- public Rectangle toRectangle() {
- return new Rectangle(ll.getLng(), ll.getLat(), ur.getLng(), ur.getLat());
- }
-
- private static LatLng boxCorners(LatLng center, double d, double brngdeg) {
- double a = center.getLat();
- double b = center.getLng();
- double R = 3963.0; // radius of earth in miles
- double brng = (Math.PI*brngdeg/180);
- double lat1 = (Math.PI*a/180);
- double lon1 = (Math.PI*b/180);
-
- // Haversine formula
- double lat2 = Math.asin( Math.sin(lat1)*Math.cos(d/R) +
- Math.cos(lat1)*Math.sin(d/R)*Math.cos(brng) );
- double lon2 = lon1 + Math.atan2(Math.sin(brng)*Math.sin(d/R)*Math.cos(lat1),
- Math.cos(d/R)-Math.sin(lat1)*Math.sin(lat2));
-
- lat2 = (lat2*180)/Math.PI;
- lon2 = (lon2*180)/Math.PI;
-
- // normalize long first
- LatLng ll = normLng(lat2,lon2);
-
- // normalize lat - could flip poles
- ll = normLat(ll.getLat(),ll.getLng());
-
- return ll;
-}
-
- /**
- * Returns a normalized Lat rectangle shape for the bounding box
- * If you go over the poles, you need to flip the lng value too
- */
- private static LatLng normLat(double lat, double lng) {
- if (lat > 90.0) {
- lat = 90.0 - (lat - 90.0);
- if (lng < 0) {
- lng = lng+180;
- } else {
- lng=lng-180;
- }
- }
- else if (lat < -90.0) {
- lat = -90.0 - (lat + 90.0);
- if (lng < 0) {
- lng = lng+180;
- } else {
- lng=lng-180;
- }
- }
- LatLng ll=new FloatLatLng(lat, lng);
- return ll;
- }
-
- /**
- * Returns a normalized Lng rectangle shape for the bounding box
- */
- private static LatLng normLng(double lat,double lng) {
- if (lng > 180.0) {
- lng = -1.0*(180.0 - (lng - 180.0));
- }
- else if (lng < -180.0) {
- lng = (lng + 180.0)+180.0;
- }
- LatLng ll=new FloatLatLng(lat, lng);
- return ll;
- }
-
- @Override
- public int hashCode() {
- final int prime = 31;
- int result = 1;
- result = prime * result + ((ll == null) ? 0 : ll.hashCode());
- result = prime * result + ((ur == null) ? 0 : ur.hashCode());
- return result;
- }
-
- @Override
- public boolean equals(Object obj) {
- if (this == obj)
- return true;
- if (obj == null)
- return false;
- if (getClass() != obj.getClass())
- return false;
- LLRect other = (LLRect) obj;
- if (ll == null) {
- if (other.ll != null)
- return false;
- } else if (!ll.equals(other.ll))
- return false;
- if (ur == null) {
- if (other.ur != null)
- return false;
- } else if (!ur.equals(other.ur))
- return false;
- return true;
- }
-
-
-}
fnp / pylucene.git / blobdiff