+++ /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.gps.coordinates;
-
-
-/**
- * Represents a coordinate system.
- */
-public interface CoordinateSystem {
-
- /**
- * Conversion to a reference coordinate system.
- * @param aCoordinates Coordinates.
- * @return Coordinates in the reference system.
- */
- Coordinates toReferenceSystem(Coordinates aCoordinates);
-}
+++ /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.gps.coordinates;
-
-/**
- * Coordinates in some 3-dimensional coordinate system.
- */
-public class Coordinates {
-
- private double _x1;
- private double _x2;
- private double _x3;
-
- /**
- * Constructs the coordinates.
- * @param aX1 First coordinate.
- * @param aX2 Second coordinate.
- * @param aX3 Third coordinate.
- */
- public Coordinates(double aX1, double aX2, double aX3) {
- _x1 = aX1;
- _x2 = aX2;
- _x3 = aX3;
- }
-
- public double getX1() {
- return _x1;
- }
-
- public double getX2() {
- return _x2;
- }
-
- public double getX3() {
- return _x3;
- }
-}
+++ /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.gps.coordinates;
-
-
-/**
- * Represents a point in some coordinate system.
- */
-public class Point {
-
- private Coordinates _coordinates;
- private CoordinateSystem _system;
-
- /**
- * Constructs the point.
- * @param aCoordinates Coordinates of the point in its coordinate system.
- * @param aSystem Coordinate system.
- */
- public Point(Coordinates aCoordinates, CoordinateSystem aSystem) {
- _coordinates = aCoordinates;
- _system = aSystem;
- }
-
- /**
- * Gets the coordinates in the point's coordinate system.
- * @return Coordinates.
- */
- public Coordinates getCoordinates() {
- return _coordinates;
- }
-
- /**
- * Gets the coordinate system.
- * @return Coordinate system.
- */
- public CoordinateSystem getCoordinateSystem() {
- return _system;
- }
-
-
-}
+++ /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.gps.coordinates;
-
-
-/**
- * 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()));
- }
-
-}
+++ /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.gps.coordinates;
-
-import static java.lang.Math.PI;
-import static java.lang.Math.cos;
-import static java.lang.Math.sin;
-
-
-/**
- * Represents the coordinate system for a GPS measurement identified by
- * <ul>
- * <li> x1: latitude in degrees </li>
- * <li> x2: longitude in degrees </li>
- * <li> x3: elevation in meters </li>
- * </ul>
- * This coordinate system models the earth as a sphere of a specific radius.
- */
-public class SphericalCoordinateSystem implements CoordinateSystem {
- /**
- * Earth radius in meters.
- */
- private static final double EARTH_RADIUS = 6371000;
-
-
- /* (non-Javadoc)
- * @see org.wamblee.gpx.CoordinateSystem#toReferenceSystem(org.wamblee.gpx.Coordinates)
- */
- public Coordinates toReferenceSystem(Coordinates aCoordinates) {
- double latrad = radians(aCoordinates.getX1());
- double lonrad = radians(aCoordinates.getX2());
- double coslat = cos(latrad);
- double sinlat = sin(latrad);
- double coslon = cos(lonrad);
- double sinlon = sin(lonrad);
-
- double trueElevation = EARTH_RADIUS + aCoordinates.getX3();
- return new Coordinates(trueElevation*coslat*coslon,
- trueElevation*coslat*sinlon,
- trueElevation*sinlat);
-
- }
-
- private double radians(double aDegrees) {
- return aDegrees/180.0*PI;
- }
-}
+++ /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.gps.coordinates;
-
-import static java.lang.Math.PI;
-import static java.lang.Math.cos;
-import static java.lang.Math.sin;
-
-
-/**
- * Represents the WGS 84 coordinate system for a GPS measurement identified by
- * <ul>
- * <li> x1: latitude in degrees </li>
- * <li> x2: longitude in degrees </li>
- * <li> x3: elevation in meters </li>
- * </ul>
- * WGS84 models the earth as an ellipse.
- */
-public class Wgs84CoordinateSystem implements CoordinateSystem {
- /*
- * Ellipse parameters
- */
-
- /**
- * The radius of the ellipse at the equator
- */
- private static final double A = 6378137.000;
-
- /**
- * The distance of the North and South poles to the center of the ellipse.
- */
- private static final double B = 6356752.314;
-
-
- /* (non-Javadoc)
- * @see org.wamblee.gpx.CoordinateSystem#toReferenceSystem(org.wamblee.gpx.Coordinates)
- */
- public Coordinates toReferenceSystem(Coordinates aCoordinates) {
- double latrad = radians(aCoordinates.getX1());
- double lonrad = radians(aCoordinates.getX2());
- double coslat = cos(latrad);
- double sinlat = sin(latrad);
- double coslon = cos(lonrad);
- double sinlon = sin(lonrad);
-
- double r = A*B/Math.sqrt(B*B*coslat*coslat + A*A*sinlat*sinlat) + aCoordinates.getX3();
-
- return new Coordinates(r*coslat*coslon,
- r*coslat*sinlon,
- r*sinlat);
-
- }
-
- private double radians(double aDegrees) {
- return aDegrees/180.0*PI;
- }
-}
git://wamblee.org / utils / commitdiff