| /* |
| * 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; |
| |
| /** |
| * Bounding box limited on three sides (top lat, left lon, right lon). The |
| * other corner is the south pole. |
| * The left-right maximum extent for this shape is PI; for anything larger, use |
| * {@link GeoWideSouthRectangle}. |
| * |
| * @lucene.internal |
| */ |
| class GeoSouthRectangle extends GeoBaseBBox { |
| /** The top latitude of the rect */ |
| protected final double topLat; |
| /** The left longitude of the rect */ |
| protected final double leftLon; |
| /** The right longitude of the rect */ |
| protected final double rightLon; |
| /** The cosine of a middle latitude */ |
| protected final double cosMiddleLat; |
| /** The upper left hand corner of the rectangle */ |
| protected final GeoPoint ULHC; |
| /** The upper right hand corner of the rectangle */ |
| protected final GeoPoint URHC; |
| |
| /** The top plane */ |
| protected final SidedPlane topPlane; |
| /** The left plane */ |
| protected final SidedPlane leftPlane; |
| /** The right plane */ |
| protected final SidedPlane rightPlane; |
| /** Backing plane (for narrow angles) */ |
| protected final SidedPlane backingPlane; |
| |
| /** Notable points for the top plane */ |
| protected final GeoPoint[] topPlanePoints; |
| /** Notable points for the left plane */ |
| protected final GeoPoint[] leftPlanePoints; |
| /** Notable points for the right plane */ |
| protected final GeoPoint[] rightPlanePoints; |
| |
| /** The center point */ |
| protected final GeoPoint centerPoint; |
| |
| /** A point on the edge */ |
| 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 topLat is the top latitude. |
| *@param leftLon is the left longitude. |
| *@param rightLon is the right longitude. |
| */ |
| public GeoSouthRectangle(final PlanetModel planetModel, final double topLat, final double leftLon, double rightLon) { |
| super(planetModel); |
| // Argument checking |
| if (topLat > Math.PI * 0.5 || topLat < -Math.PI * 0.5) |
| throw new IllegalArgumentException("Top 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.topLat = topLat; |
| this.leftLon = leftLon; |
| this.rightLon = rightLon; |
| |
| final double sinTopLat = Math.sin(topLat); |
| final double cosTopLat = Math.cos(topLat); |
| 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 four points |
| this.ULHC = new GeoPoint(planetModel, sinTopLat, sinLeftLon, cosTopLat, cosLeftLon, topLat, leftLon); |
| this.URHC = new GeoPoint(planetModel, sinTopLat, sinRightLon, cosTopLat, cosRightLon, topLat, rightLon); |
| |
| final double middleLat = (topLat - Math.PI * 0.5) * 0.5; |
| final double sinMiddleLat = Math.sin(middleLat); |
| this.cosMiddleLat = Math.cos(middleLat); |
| // 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, sinMiddleLat, sinMiddleLon, cosMiddleLat, cosMiddleLon); |
| |
| this.topPlane = new SidedPlane(centerPoint, planetModel, sinTopLat); |
| this.leftPlane = new SidedPlane(centerPoint, cosLeftLon, sinLeftLon); |
| this.rightPlane = new SidedPlane(centerPoint, cosRightLon, sinRightLon); |
| |
| assert(topPlane.isWithin(centerPoint)); |
| assert(leftPlane.isWithin(centerPoint)); |
| assert(rightPlane.isWithin(centerPoint)); |
| |
| // 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.topPlanePoints = new GeoPoint[]{ULHC, URHC}; |
| this.leftPlanePoints = new GeoPoint[]{ULHC, planetModel.SOUTH_POLE}; |
| this.rightPlanePoints = new GeoPoint[]{URHC, planetModel.SOUTH_POLE}; |
| |
| this.edgePoints = new GeoPoint[]{planetModel.SOUTH_POLE}; |
| |
| } |
| |
| /** |
| * Constructor for deserialization. |
| * @param planetModel is the planet model. |
| * @param inputStream is the input stream. |
| */ |
| public GeoSouthRectangle(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, topLat); |
| SerializableObject.writeDouble(outputStream, leftLon); |
| SerializableObject.writeDouble(outputStream, rightLon); |
| } |
| |
| @Override |
| public GeoBBox expand(final double angle) { |
| final double newTopLat = topLat + angle; |
| final double newBottomLat = -Math.PI * 0.5; |
| // 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 backingPlane.isWithin(x, y, z) && |
| topPlane.isWithin(x, y, z) && |
| leftPlane.isWithin(x, y, z) && |
| rightPlane.isWithin(x, y, z); |
| } |
| |
| @Override |
| public double getRadius() { |
| // Here we compute the distance from the middle point to one of the corners. However, we need to be careful |
| // to use the longest of three distances: the distance to a corner on the top; the distnace to a corner on the bottom, and |
| // the distance to the right or left edge from the center. |
| final double centerAngle = (rightLon - (rightLon + leftLon) * 0.5) * cosMiddleLat; |
| final double topAngle = centerPoint.arcDistance(URHC); |
| return Math.max(centerAngle, topAngle); |
| } |
| |
| @Override |
| public GeoPoint[] getEdgePoints() { |
| return edgePoints; |
| } |
| |
| @Override |
| public GeoPoint getCenter() { |
| return centerPoint; |
| } |
| |
| @Override |
| public boolean intersects(final Plane p, final GeoPoint[] notablePoints, final Membership... bounds) { |
| return p.intersects(planetModel, topPlane, notablePoints, topPlanePoints, bounds, leftPlane, rightPlane) || |
| p.intersects(planetModel, leftPlane, notablePoints, leftPlanePoints, bounds, rightPlane, topPlane) || |
| p.intersects(planetModel, rightPlane, notablePoints, rightPlanePoints, bounds, leftPlane, topPlane); |
| } |
| |
| @Override |
| public boolean intersects(final GeoShape geoShape) { |
| return geoShape.intersects(topPlane, topPlanePoints, leftPlane, rightPlane) || |
| geoShape.intersects(leftPlane, leftPlanePoints, rightPlane, topPlane) || |
| geoShape.intersects(rightPlane, rightPlanePoints, leftPlane, topPlane); |
| } |
| |
| @Override |
| public void getBounds(Bounds bounds) { |
| super.getBounds(bounds); |
| bounds |
| .addHorizontalPlane(planetModel, topLat, topPlane, leftPlane, rightPlane) |
| .addVerticalPlane(planetModel, leftLon, leftPlane, topPlane, rightPlane) |
| .addVerticalPlane(planetModel, rightLon, rightPlane, topPlane, leftPlane) |
| //.addIntersection(planetModel, rightPlane, leftPlane, topPlane) |
| .addPoint(URHC).addPoint(ULHC).addPoint(planetModel.SOUTH_POLE); |
| } |
| |
| @Override |
| protected double outsideDistance(final DistanceStyle distanceStyle, final double x, final double y, final double z) { |
| final double topDistance = distanceStyle.computeDistance(planetModel, topPlane, x,y,z, leftPlane, rightPlane); |
| final double leftDistance = distanceStyle.computeDistance(planetModel, leftPlane, x,y,z, rightPlane, topPlane); |
| final double rightDistance = distanceStyle.computeDistance(planetModel, rightPlane, x,y,z, leftPlane, topPlane); |
| |
| final double ULHCDistance = distanceStyle.computeDistance(ULHC, x,y,z); |
| final double URHCDistance = distanceStyle.computeDistance(URHC, x,y,z); |
| |
| return Math.min( |
| Math.min( |
| topDistance, |
| Math.min(leftDistance, rightDistance)), |
| Math.min(ULHCDistance, URHCDistance)); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof GeoSouthRectangle)) |
| return false; |
| GeoSouthRectangle other = (GeoSouthRectangle) o; |
| return super.equals(other) && other.ULHC.equals(ULHC) && other.URHC.equals(URHC); |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = super.hashCode(); |
| result = 31 * result + ULHC.hashCode(); |
| result = 31 * result + URHC.hashCode(); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return "GeoSouthRectangle: {planetmodel="+planetModel+", toplat=" + topLat + "(" + topLat * 180.0 / Math.PI + "), leftlon=" + leftLon + "(" + leftLon * 180.0 / Math.PI + "), rightlon=" + rightLon + "(" + rightLon * 180.0 / Math.PI + ")}"; |
| } |
| } |
| |
| |