lucene/spatial3d/src/java/org/apache/lucene/spatial3d/geom/GeoDegenerateHorizontalLine.java - lucene-solr - Git at Google

 /*
  * 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.spatial3d.geom;

 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.IOException;

 /**
  * Degenerate bounding box limited on two sides (left lon, right lon).
  * The left-right maximum extent for this shape is PI; for anything larger, use
  * GeoWideDegenerateHorizontalLine.
  *
  * @lucene.internal
  */
 class GeoDegenerateHorizontalLine extends GeoBaseBBox {
   /** Latitude of horizontal line */
   protected final double latitude;
   /** Left bounding longitude of line */
   protected final double leftLon;
   /** Right bounding longitude of line */
   protected final double rightLon;

   /** Left hand endpoint of line */
   protected final GeoPoint LHC;
   /** Right hand endpoint of line */
   protected final GeoPoint RHC;

   /** The plane describing the line */
   protected final Plane plane;
   /** The left side end plane */
   protected final SidedPlane leftPlane;
   /** The right side end plane */
   protected final SidedPlane rightPlane;

   /** Notable points for the line */
   protected final GeoPoint[] planePoints;

   /** Center of line */
   protected final GeoPoint centerPoint;
   /** A point that's on the line */
   protected final GeoPoint[] edgePoints;

   /**
    * Accepts only values in the following ranges: lat: {@code -PI/2 -> PI/2}, lon: {@code -PI -> PI}
    *@param planetModel is the planet model.
    *@param latitude is the latitude of the line.
    *@param leftLon is the left end longitude.
    *@param rightLon is the right end longitude.
    */
   public GeoDegenerateHorizontalLine(final PlanetModel planetModel, final double latitude, final double leftLon, double rightLon) {
     super(planetModel);
     // Argument checking
     if (latitude > Math.PI * 0.5 || latitude < -Math.PI * 0.5)
       throw new IllegalArgumentException("Latitude out of range");
     if (leftLon < -Math.PI || leftLon > Math.PI)
       throw new IllegalArgumentException("Left longitude out of range");
     if (rightLon < -Math.PI || rightLon > Math.PI)
       throw new IllegalArgumentException("Right longitude out of range");
     double extent = rightLon - leftLon;
     if (extent < 0.0) {
       extent += 2.0 * Math.PI;
     }
     if (extent > Math.PI)
       throw new IllegalArgumentException("Width of rectangle too great");

     this.latitude = latitude;
     this.leftLon = leftLon;
     this.rightLon = rightLon;

     final double sinLatitude = Math.sin(latitude);
     final double cosLatitude = Math.cos(latitude);
     final double sinLeftLon = Math.sin(leftLon);
     final double cosLeftLon = Math.cos(leftLon);
     final double sinRightLon = Math.sin(rightLon);
     final double cosRightLon = Math.cos(rightLon);

     // Now build the two points
     this.LHC = new GeoPoint(planetModel, sinLatitude, sinLeftLon, cosLatitude, cosLeftLon, latitude, leftLon);
     this.RHC = new GeoPoint(planetModel, sinLatitude, sinRightLon, cosLatitude, cosRightLon, latitude, rightLon);

     this.plane = new Plane(planetModel, sinLatitude);

     // Normalize
     while (leftLon > rightLon) {
       rightLon += Math.PI * 2.0;
     }
     final double middleLon = (leftLon + rightLon) * 0.5;
     final double sinMiddleLon = Math.sin(middleLon);
     final double cosMiddleLon = Math.cos(middleLon);

     this.centerPoint = new GeoPoint(planetModel, sinLatitude, sinMiddleLon, cosLatitude, cosMiddleLon);
     this.leftPlane = new SidedPlane(centerPoint, cosLeftLon, sinLeftLon);
     this.rightPlane = new SidedPlane(centerPoint, cosRightLon, sinRightLon);

     this.planePoints = new GeoPoint[]{LHC, RHC};

     this.edgePoints = new GeoPoint[]{centerPoint};
   }

   /**
    * Constructor for deserialization.
    * @param planetModel is the planet model.
    * @param inputStream is the input stream.
    */
   public GeoDegenerateHorizontalLine(final PlanetModel planetModel, final InputStream inputStream) throws IOException {
     this(planetModel, SerializableObject.readDouble(inputStream), SerializableObject.readDouble(inputStream), SerializableObject.readDouble(inputStream));
   }

   @Override
   public void write(final OutputStream outputStream) throws IOException {
     SerializableObject.writeDouble(outputStream, latitude);
     SerializableObject.writeDouble(outputStream, leftLon);
     SerializableObject.writeDouble(outputStream, rightLon);
   }

   @Override
   public GeoBBox expand(final double angle) {
     double newTopLat = latitude + angle;
     double newBottomLat = latitude - angle;
     // Figuring out when we escalate to a special case requires some prefiguring
     double currentLonSpan = rightLon - leftLon;
     if (currentLonSpan < 0.0)
       currentLonSpan += Math.PI * 2.0;
     double newLeftLon = leftLon - angle;
     double newRightLon = rightLon + angle;
     if (currentLonSpan + 2.0 * angle >= Math.PI * 2.0) {
       newLeftLon = -Math.PI;
       newRightLon = Math.PI;
     }
     return GeoBBoxFactory.makeGeoBBox(planetModel, newTopLat, newBottomLat, newLeftLon, newRightLon);
   }

   @Override
   public boolean isWithin(final double x, final double y, final double z) {
     return plane.evaluateIsZero(x, y, z) &&
         leftPlane.isWithin(x, y, z) &&
         rightPlane.isWithin(x, y, z);
   }

   @Override
   public double getRadius() {
     double topAngle = centerPoint.arcDistance(RHC);
     double bottomAngle = centerPoint.arcDistance(LHC);
     return Math.max(topAngle, bottomAngle);
   }

   @Override
   public GeoPoint getCenter() {
     return centerPoint;
   }

   @Override
   public GeoPoint[] getEdgePoints() {
     return edgePoints;
   }

   @Override
   public boolean intersects(final Plane p, final GeoPoint[] notablePoints, final Membership... bounds) {
     return p.intersects(planetModel, plane, notablePoints, planePoints, bounds, leftPlane, rightPlane);
   }

   @Override
   public boolean intersects(final GeoShape geoShape) {
     return geoShape.intersects(plane, planePoints, leftPlane, rightPlane);
   }

   @Override
   public void getBounds(Bounds bounds) {
     super.getBounds(bounds);
     bounds.addHorizontalPlane(planetModel, latitude, plane, leftPlane, rightPlane)
       .addPoint(LHC).addPoint(RHC);
   }

   @Override
   public int getRelationship(final GeoShape path) {
     //System.err.println("getting relationship between "+this+" and "+path);
     if (intersects(path)) {
       //System.err.println(" overlaps");
       return OVERLAPS;
     }

     if (path.isWithin(centerPoint)) {
       //System.err.println(" contains");
       return CONTAINS;
     }

     //System.err.println(" disjoint");
     return DISJOINT;
   }

   @Override
   protected double outsideDistance(final DistanceStyle distanceStyle, final double x, final double y, final double z) {
     final double distance = distanceStyle.computeDistance(planetModel, plane, x,y,z, leftPlane, rightPlane);

     final double LHCDistance = distanceStyle.computeDistance(LHC, x,y,z);
     final double RHCDistance = distanceStyle.computeDistance(RHC, x,y,z);

     return Math.min(
       distance,
       Math.min(LHCDistance, RHCDistance));
   }

   @Override
   public boolean equals(Object o) {
     if (!(o instanceof GeoDegenerateHorizontalLine))
       return false;
     GeoDegenerateHorizontalLine other = (GeoDegenerateHorizontalLine) o;
     return super.equals(other) && other.LHC.equals(LHC) && other.RHC.equals(RHC);
   }

   @Override
   public int hashCode() {
     int result = super.hashCode();
     result = 31 * result + LHC.hashCode();
     result = 31 * result + RHC.hashCode();
     return result;
   }

   @Override
   public String toString() {
     return "GeoDegenerateHorizontalLine: {planetmodel="+planetModel+", latitude=" + latitude + "(" + latitude * 180.0 / Math.PI + "), leftlon=" + leftLon + "(" + leftLon * 180.0 / Math.PI + "), rightLon=" + rightLon + "(" + rightLon * 180.0 / Math.PI + ")}";
   }
 }
	/*
	* 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.spatial3d.geom;

	import java.io.InputStream;
	import java.io.OutputStream;
	import java.io.IOException;

	/**
	* Degenerate bounding box limited on two sides (left lon, right lon).
	* The left-right maximum extent for this shape is PI; for anything larger, use
	* GeoWideDegenerateHorizontalLine.
	*
	* @lucene.internal
	*/
	class GeoDegenerateHorizontalLine extends GeoBaseBBox {
	/** Latitude of horizontal line */
	protected final double latitude;
	/** Left bounding longitude of line */
	protected final double leftLon;
	/** Right bounding longitude of line */
	protected final double rightLon;

	/** Left hand endpoint of line */
	protected final GeoPoint LHC;
	/** Right hand endpoint of line */
	protected final GeoPoint RHC;

	/** The plane describing the line */
	protected final Plane plane;
	/** The left side end plane */
	protected final SidedPlane leftPlane;
	/** The right side end plane */
	protected final SidedPlane rightPlane;

	/** Notable points for the line */
	protected final GeoPoint[] planePoints;

	/** Center of line */
	protected final GeoPoint centerPoint;
	/** A point that's on the line */
	protected final GeoPoint[] edgePoints;

	/**
	* Accepts only values in the following ranges: lat: {@code -PI/2 -> PI/2}, lon: {@code -PI -> PI}
	*@param planetModel is the planet model.
	*@param latitude is the latitude of the line.
	*@param leftLon is the left end longitude.
	*@param rightLon is the right end longitude.
	*/
	public GeoDegenerateHorizontalLine(final PlanetModel planetModel, final double latitude, final double leftLon, double rightLon) {
	super(planetModel);
	// Argument checking
	if (latitude > Math.PI * 0.5 \|\| latitude < -Math.PI * 0.5)
	throw new IllegalArgumentException("Latitude out of range");
	if (leftLon < -Math.PI \|\| leftLon > Math.PI)
	throw new IllegalArgumentException("Left longitude out of range");
	if (rightLon < -Math.PI \|\| rightLon > Math.PI)
	throw new IllegalArgumentException("Right longitude out of range");
	double extent = rightLon - leftLon;
	if (extent < 0.0) {
	extent += 2.0 * Math.PI;
	}
	if (extent > Math.PI)
	throw new IllegalArgumentException("Width of rectangle too great");

	this.latitude = latitude;
	this.leftLon = leftLon;
	this.rightLon = rightLon;

	final double sinLatitude = Math.sin(latitude);
	final double cosLatitude = Math.cos(latitude);
	final double sinLeftLon = Math.sin(leftLon);
	final double cosLeftLon = Math.cos(leftLon);
	final double sinRightLon = Math.sin(rightLon);
	final double cosRightLon = Math.cos(rightLon);

	// Now build the two points
	this.LHC = new GeoPoint(planetModel, sinLatitude, sinLeftLon, cosLatitude, cosLeftLon, latitude, leftLon);
	this.RHC = new GeoPoint(planetModel, sinLatitude, sinRightLon, cosLatitude, cosRightLon, latitude, rightLon);

	this.plane = new Plane(planetModel, sinLatitude);

	// Normalize
	while (leftLon > rightLon) {
	rightLon += Math.PI * 2.0;
	}
	final double middleLon = (leftLon + rightLon) * 0.5;
	final double sinMiddleLon = Math.sin(middleLon);
	final double cosMiddleLon = Math.cos(middleLon);

	this.centerPoint = new GeoPoint(planetModel, sinLatitude, sinMiddleLon, cosLatitude, cosMiddleLon);
	this.leftPlane = new SidedPlane(centerPoint, cosLeftLon, sinLeftLon);
	this.rightPlane = new SidedPlane(centerPoint, cosRightLon, sinRightLon);

	this.planePoints = new GeoPoint[]{LHC, RHC};

	this.edgePoints = new GeoPoint[]{centerPoint};
	}

	/**
	* Constructor for deserialization.
	* @param planetModel is the planet model.
	* @param inputStream is the input stream.
	*/
	public GeoDegenerateHorizontalLine(final PlanetModel planetModel, final InputStream inputStream) throws IOException {
	this(planetModel, SerializableObject.readDouble(inputStream), SerializableObject.readDouble(inputStream), SerializableObject.readDouble(inputStream));
	}

	@Override
	public void write(final OutputStream outputStream) throws IOException {
	SerializableObject.writeDouble(outputStream, latitude);
	SerializableObject.writeDouble(outputStream, leftLon);
	SerializableObject.writeDouble(outputStream, rightLon);
	}

	@Override
	public GeoBBox expand(final double angle) {
	double newTopLat = latitude + angle;
	double newBottomLat = latitude - angle;
	// Figuring out when we escalate to a special case requires some prefiguring
	double currentLonSpan = rightLon - leftLon;
	if (currentLonSpan < 0.0)
	currentLonSpan += Math.PI * 2.0;
	double newLeftLon = leftLon - angle;
	double newRightLon = rightLon + angle;
	if (currentLonSpan + 2.0 * angle >= Math.PI * 2.0) {
	newLeftLon = -Math.PI;
	newRightLon = Math.PI;
	}
	return GeoBBoxFactory.makeGeoBBox(planetModel, newTopLat, newBottomLat, newLeftLon, newRightLon);
	}

	@Override
	public boolean isWithin(final double x, final double y, final double z) {
	return plane.evaluateIsZero(x, y, z) &&
	leftPlane.isWithin(x, y, z) &&
	rightPlane.isWithin(x, y, z);
	}

	@Override
	public double getRadius() {
	double topAngle = centerPoint.arcDistance(RHC);
	double bottomAngle = centerPoint.arcDistance(LHC);
	return Math.max(topAngle, bottomAngle);
	}

	@Override
	public GeoPoint getCenter() {
	return centerPoint;
	}

	@Override
	public GeoPoint[] getEdgePoints() {
	return edgePoints;
	}

	@Override
	public boolean intersects(final Plane p, final GeoPoint[] notablePoints, final Membership... bounds) {
	return p.intersects(planetModel, plane, notablePoints, planePoints, bounds, leftPlane, rightPlane);
	}

	@Override
	public boolean intersects(final GeoShape geoShape) {
	return geoShape.intersects(plane, planePoints, leftPlane, rightPlane);
	}

	@Override
	public void getBounds(Bounds bounds) {
	super.getBounds(bounds);
	bounds.addHorizontalPlane(planetModel, latitude, plane, leftPlane, rightPlane)
	.addPoint(LHC).addPoint(RHC);
	}

	@Override
	public int getRelationship(final GeoShape path) {
	//System.err.println("getting relationship between "+this+" and "+path);
	if (intersects(path)) {
	//System.err.println(" overlaps");
	return OVERLAPS;
	}

	if (path.isWithin(centerPoint)) {
	//System.err.println(" contains");
	return CONTAINS;
	}

	//System.err.println(" disjoint");
	return DISJOINT;
	}

	@Override
	protected double outsideDistance(final DistanceStyle distanceStyle, final double x, final double y, final double z) {
	final double distance = distanceStyle.computeDistance(planetModel, plane, x,y,z, leftPlane, rightPlane);

	final double LHCDistance = distanceStyle.computeDistance(LHC, x,y,z);
	final double RHCDistance = distanceStyle.computeDistance(RHC, x,y,z);

	return Math.min(
	distance,
	Math.min(LHCDistance, RHCDistance));
	}

	@Override
	public boolean equals(Object o) {
	if (!(o instanceof GeoDegenerateHorizontalLine))
	return false;
	GeoDegenerateHorizontalLine other = (GeoDegenerateHorizontalLine) o;
	return super.equals(other) && other.LHC.equals(LHC) && other.RHC.equals(RHC);
	}

	@Override
	public int hashCode() {
	int result = super.hashCode();
	result = 31 * result + LHC.hashCode();
	result = 31 * result + RHC.hashCode();
	return result;
	}

	@Override
	public String toString() {
	return "GeoDegenerateHorizontalLine: {planetmodel="+planetModel+", latitude=" + latitude + "(" + latitude * 180.0 / Math.PI + "), leftlon=" + leftLon + "(" + leftLon * 180.0 / Math.PI + "), rightLon=" + rightLon + "(" + rightLon * 180.0 / Math.PI + ")}";
	}
	}