+++ /dev/null
-/*
- * Copyright 2006 the original author or authors.
- *
- * Licensed 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.wamblee.gpx;
-
-/**
- * Reference coordinate system which is the basis for defining metrics.
- * This is a Cartesian coordinate system.
- */
-public class ReferenceCoordinateSystem implements CoordinateSystem {
-
- /**
- * Constructs the coordinate system.
- *
- */
- public ReferenceCoordinateSystem() {
- // Empty
- }
-
- /*
- * (non-Javadoc)
- *
- * @see org.wamblee.gpx.CoordinateSystem#toReferenceSystem(org.wamblee.gpx.Coordinates)
- */
- public Coordinates toReferenceSystem(Coordinates aCoordinates) {
- return aCoordinates;
- }
-
- /*
- * (non-Javadoc)
- *
- * @see org.wamblee.gpx.CoordinateSystem#distance(org.wamblee.gpx.Coordinates,
- * org.wamblee.gpx.Coordinates)
- */
- private static double distance(Coordinates aC1, Coordinates aC2) {
- return Math.sqrt(square(aC1.getX1() - aC2.getX1())
- + square(aC1.getX2() - aC2.getX2())
- + square(aC1.getX3() - aC2.getX3()));
- }
-
- private static double square(double x) {
- return x * x;
- }
-
- /**
- * Computes the distance between two points in arbitrary coordinate systems.
- * @param aP1 First point.
- * @param aP2 Second point.
- * @return Distance.
- */
- public static double distance(Point aP1, Point aP2) {
- return distance( aP1.getCoordinateSystem().toReferenceSystem(aP1.getCoordinates()),
- aP2.getCoordinateSystem().toReferenceSystem(aP2.getCoordinates()));
- }
-
-}