The opposite transformation of compass to cartesian. - Java java.lang

Java examples for java.lang:Math Geometry

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Description

The opposite transformation of compass to cartesian.

Demo Code

/* Copyright (c) 2011 Danish Maritime Authority.
 *
 * 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./*  w  w w .j a  v  a  2 s . c o  m*/
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        double a = 2.45678;
        System.out.println(cartesian2compass(a));
    }

    /**
     * The opposite transformation of compass2cartesian.
     *
     * @param a
     * @return
     */
    public static double cartesian2compass(double a) {
        return compass2cartesian(a);
    }

    /**
     * Converts a compass heading (0-360 degrees, 0 north) to a
     * cartesian angle (0-360, 0 along x-axis).
     *
     * @param a
     * @return
     */
    public static double compass2cartesian(double a) {
        double cartesianAngle;

        if ((a >= 0.0) && (a <= 90.0)) {
            cartesianAngle = 90.0 - a;
        } else {
            cartesianAngle = 450.0 - a;
        }
        return cartesianAngle;
    }
}

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