| /* |
| * 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; |
| |
| /** |
| * An implementer of this interface is capable of computing the described "distance" values, |
| * which are meant to provide both actual distance values, as well as |
| * distance estimates that can be computed more cheaply. |
| * |
| * @lucene.experimental |
| */ |
| public interface GeoDistance extends Membership { |
| |
| // The following methods compute distances from the shape to a point |
| // expected to be INSIDE the shape. Typically a value of Double.POSITIVE_INFINITY |
| // is returned for points that happen to be outside the shape. |
| |
| /** |
| * Compute this shape's <em>internal</em> "distance" to the GeoPoint. |
| * Implementations should clarify how this is computed when it's non-obvious. |
| * A return value of Double.POSITIVE_INFINITY should be returned for |
| * points outside of the shape. |
| * |
| * @param distanceStyle is the distance style. |
| * @param point is the point to compute the distance to. |
| * @return the distance. |
| */ |
| public default double computeDistance(final DistanceStyle distanceStyle, final GeoPoint point) { |
| return computeDistance(distanceStyle, point.x, point.y, point.z); |
| } |
| |
| /** |
| * Compute this shape's <em>internal</em> "distance" to the GeoPoint. |
| * Implementations should clarify how this is computed when it's non-obvious. |
| * A return value of Double.POSITIVE_INFINITY should be returned for |
| * points outside of the shape. |
| * |
| * @param distanceStyle is the distance style. |
| * @param x is the point's unit x coordinate (using U.S. convention). |
| * @param y is the point's unit y coordinate (using U.S. convention). |
| * @param z is the point's unit z coordinate (using U.S. convention). |
| * @return the distance. |
| */ |
| public double computeDistance(final DistanceStyle distanceStyle, final double x, final double y, final double z); |
| |
| /** |
| * Compute the shape's <em>delta</em> distance given a point. This is defined as the distance that someone traveling |
| * the "length" of the shape would have to go out of their way to include the point. |
| * For some shapes, e.g. paths, this makes perfect sense. For other shapes, e.g. circles, the "length" of the shape is zero, |
| * and the delta is computed as the distance from the center to the point and back. |
| * A return value of Double.POSITIVE_INFINITY should be returned for |
| * points outside of the shape. |
| * |
| * @param distanceStyle is the distance style. |
| * @param point is the point to compute the distance to. |
| * @return the distance. |
| */ |
| public default double computeDeltaDistance(final DistanceStyle distanceStyle, final GeoPoint point) { |
| return computeDeltaDistance(distanceStyle, point.x, point.y, point.z); |
| } |
| |
| /** |
| * Compute the shape's <em>delta</em> distance given a point. This is defined as the distance that someone traveling |
| * the "length" of the shape would have to go out of their way to include the point. |
| * For some shapes, e.g. paths, this makes perfect sense. For other shapes, e.g. circles, the "length" of the shape is zero, |
| * and the delta is computed as the distance from the center to the point and back. |
| * A return value of Double.POSITIVE_INFINITY should be returned for |
| * points outside of the shape. |
| * |
| * @param distanceStyle is the distance style. |
| * @param x is the point's unit x coordinate (using U.S. convention). |
| * @param y is the point's unit y coordinate (using U.S. convention). |
| * @param z is the point's unit z coordinate (using U.S. convention). |
| * @return the distance. |
| */ |
| public default double computeDeltaDistance(final DistanceStyle distanceStyle, final double x, final double y, final double z) { |
| // Default to standard distance * 2, which is fine for circles |
| return computeDistance(distanceStyle, x, y, z) * 2.0; |
| } |
| |
| } |