package org.apache.lucene.geo3d;

/*
 * 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.
 */

/**
 * Distance computation styles, supporting various ways of computing
 * distance to shapes.
 *
 * @lucene.experimental
 */
public interface DistanceStyle {

  // convenient access to built-in styles:

  /** Arc distance calculator */
  public static final ArcDistance ARC = ArcDistance.INSTANCE;
  /** Linear distance calculator */
  public static final LinearDistance LINEAR = LinearDistance.INSTANCE;
  /** Linear distance squared calculator */
  public static final LinearSquaredDistance LINEAR_SQUARED = LinearSquaredDistance.INSTANCE;
  /** Normal distance calculator */
  public static final NormalDistance NORMAL = NormalDistance.INSTANCE;
  /** Normal distance squared calculator */
  public static final NormalSquaredDistance NORMAL_SQUARED = NormalSquaredDistance.INSTANCE;

  /** Compute the distance from a point to another point.
   * @param point1 Starting point
   * @param point2 Final point
   * @return the distance
   */
  public double computeDistance(final GeoPoint point1, final GeoPoint point2);
  
  /** Compute the distance from a point to another point.
   * @param point1 Starting point
   * @param x2 Final point x
   * @param y2 Final point y
   * @param z2 Final point z
   * @return the distance
   */
  public double computeDistance(final GeoPoint point1, final double x2, final double y2, final double z2);

  /** Compute the distance from a plane to a point.
   * @param planetModel The planet model
   * @param plane The plane
   * @param point The point
   * @param bounds are the plane bounds
   * @return the distance
   */
  public double computeDistance(final PlanetModel planetModel, final Plane plane, final GeoPoint point,
                                        final Membership... bounds);
  
  /** Compute the distance from a plane to a point.
   * @param planetModel The planet model
   * @param plane The plane
   * @param x The point x
   * @param y The point y
   * @param z The point z
   * @param bounds are the plane bounds
   * @return the distance
   */
  public double computeDistance(final PlanetModel planetModel, final Plane plane, final double x, final double y, final double z, final Membership... bounds);

}


