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Apache Lucene (module: spatial3d)
/*
* 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.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Bounding box limited on left and right. The left-right maximum extent for this shape is PI; for
* anything larger, use {@link GeoWideLongitudeSlice}.
*
* @lucene.internal
*/
class GeoLongitudeSlice extends GeoBaseBBox {
/** The left longitude of the slice */
protected final double leftLon;
/** The right longitude of the slice */
protected final double rightLon;
/** The left plane of the slice */
protected final SidedPlane leftPlane;
/** The right plane of the slice */
protected final SidedPlane rightPlane;
/** Backing plane (for narrow angles) */
protected final SidedPlane backingPlane;
/** The notable points for the slice (north and south poles) */
protected final GeoPoint[] planePoints;
/** The center point of the slice */
protected final GeoPoint centerPoint;
/** A point on the edge of the slice */
protected final GeoPoint[] edgePoints;
/**
* Accepts only values in the following ranges: lon: {@code -PI -> PI}
*
* @param planetModel is the planet model.
* @param leftLon is the left longitude of the slice.
* @param rightLon is the right longitude of the slice.
*/
public GeoLongitudeSlice(final PlanetModel planetModel, final double leftLon, double rightLon) {
super(planetModel);
// Argument checking
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.leftLon = leftLon;
this.rightLon = rightLon;
final double sinLeftLon = Math.sin(leftLon);
final double cosLeftLon = Math.cos(leftLon);
final double sinRightLon = Math.sin(rightLon);
final double cosRightLon = Math.cos(rightLon);
// 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, 0.0, sinMiddleLon, 1.0, cosMiddleLon);
this.leftPlane = new SidedPlane(centerPoint, cosLeftLon, sinLeftLon);
this.rightPlane = new SidedPlane(centerPoint, cosRightLon, sinRightLon);
// Compute the backing plane
// The normal for this plane is a unit vector through the origin that goes through the middle
// lon. The plane's D is 0,
// because it goes through the origin.
this.backingPlane = new SidedPlane(this.centerPoint, cosMiddleLon, sinMiddleLon, 0.0, 0.0);
this.planePoints = new GeoPoint[] {planetModel.NORTH_POLE, planetModel.SOUTH_POLE};
this.edgePoints = new GeoPoint[] {planetModel.NORTH_POLE};
}
/**
* Constructor for deserialization.
*
* @param planetModel is the planet model.
* @param inputStream is the input stream.
*/
public GeoLongitudeSlice(final PlanetModel planetModel, final InputStream inputStream)
throws IOException {
this(
planetModel,
SerializableObject.readDouble(inputStream),
SerializableObject.readDouble(inputStream));
}
@Override
public void write(final OutputStream outputStream) throws IOException {
SerializableObject.writeDouble(outputStream, leftLon);
SerializableObject.writeDouble(outputStream, rightLon);
}
@Override
public GeoBBox expand(final double 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, Math.PI * 0.5, -Math.PI * 0.5, newLeftLon, newRightLon);
}
@Override
public boolean isWithin(final double x, final double y, final double z) {
return backingPlane.isWithin(x, y, z)
&& leftPlane.isWithin(x, y, z)
&& rightPlane.isWithin(x, y, z);
}
@Override
public double getRadius() {
// Compute the extent and divide by two
double extent = rightLon - leftLon;
if (extent < 0.0) {
extent += Math.PI * 2.0;
}
return Math.max(Math.PI * 0.5, extent * 0.5);
}
@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, leftPlane, notablePoints, planePoints, bounds, rightPlane)
|| p.intersects(planetModel, rightPlane, notablePoints, planePoints, bounds, leftPlane);
}
@Override
public boolean intersects(final GeoShape geoShape) {
return geoShape.intersects(leftPlane, planePoints, rightPlane)
|| geoShape.intersects(rightPlane, planePoints, leftPlane);
}
@Override
public void getBounds(Bounds bounds) {
super.getBounds(bounds);
bounds
.addVerticalPlane(planetModel, leftLon, leftPlane, rightPlane)
.addVerticalPlane(planetModel, rightLon, rightPlane, leftPlane)
// .addIntersection(planetModel, rightPlane, leftPlane)
.addPoint(planetModel.NORTH_POLE)
.addPoint(planetModel.SOUTH_POLE);
}
@Override
protected double outsideDistance(
final DistanceStyle distanceStyle, final double x, final double y, final double z) {
final double leftDistance =
distanceStyle.computeDistance(planetModel, leftPlane, x, y, z, rightPlane);
final double rightDistance =
distanceStyle.computeDistance(planetModel, rightPlane, x, y, z, leftPlane);
final double northDistance = distanceStyle.computeDistance(planetModel.NORTH_POLE, x, y, z);
final double southDistance = distanceStyle.computeDistance(planetModel.SOUTH_POLE, x, y, z);
return Math.min(Math.min(northDistance, southDistance), Math.min(leftDistance, rightDistance));
}
@Override
public boolean equals(Object o) {
if (!(o instanceof GeoLongitudeSlice)) {
return false;
}
GeoLongitudeSlice other = (GeoLongitudeSlice) o;
return super.equals(other) && other.leftLon == leftLon && other.rightLon == rightLon;
}
@Override
public int hashCode() {
int result = super.hashCode();
long temp = Double.doubleToLongBits(leftLon);
result = 31 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(rightLon);
result = 31 * result + (int) (temp ^ (temp >>> 32));
return result;
}
@Override
public String toString() {
return "GeoLongitudeSlice: {planetmodel="
+ planetModel
+ ", leftlon="
+ leftLon
+ "("
+ leftLon * 180.0 / Math.PI
+ "), rightlon="
+ rightLon
+ "("
+ rightLon * 180.0 / Math.PI
+ ")}";
}
}