bundles/core/org.eclipse.apogy.core.environment.surface/src-gen-custom/org/eclipse/apogy/core/environment/surface/impl/SurfaceEnvironmentUtilitiesCustomImpl.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Pierre Allard,
 *     Regent L'Archeveque - initial API and implementation
 *
 * SPDX-License-Identifier: EPL-1.0
 *     
 *******************************************************************************/
package org.eclipse.apogy.core.environment.surface.impl;

import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.SimpleTimeZone;
import java.util.TimeZone;

public class SurfaceEnvironmentUtilitiesCustomImpl extends SurfaceEnvironmentUtilitiesImpl {

	public static final float MINUTES_PER_DAY = 24 * 60;
	public static final float SECONDS_PER_DAY = 24 * 60 * 60;

	// Gregorian Calendar adopted Oct. 15, 1582 (2299161)
	public static final int JGREG = 15 + 31 * (10 + 12 * 1582);
	public static final double HALFSECOND = 0.5;

	public double convertToJulianDate(Date date) {
		TimeZone timeZone = new SimpleTimeZone(0, "GMT");

		// Creates a calendar that is GMT.
		Calendar calendar = Calendar.getInstance(timeZone, Locale.CANADA);
		calendar.setTime(date);

		int year = calendar.get(Calendar.YEAR);
		int month = calendar.get(Calendar.MONTH) + 1;
		int day = calendar.get(Calendar.DAY_OF_MONTH);
		int hour = calendar.get(Calendar.HOUR_OF_DAY);
		int min = calendar.get(Calendar.MINUTE);
		int sec = calendar.get(Calendar.SECOND);

		double a = Math.floor((14.0 - month) / 12.0);
		double y = year + 4800.0 - a;
		double m = month + 12 * a - 3;

		double jdn = day + Math.floor(((153.0 * m) + 2.0) / 5.0) + 365 * y + Math.floor(y / 4.0) - Math.floor(y / 100.0)
				+ Math.floor(y / 400.0) - 32045;

		double fraction = ((double) hour - 12.0) / 24.0 + (double) min / 1440.0 + (double) sec / 86400.0;

		double jd = jdn + fraction;

		return jd;
	}

	public float parseRightAscension(String rightAscensionString) throws Exception {
		float angle = 0.0f;

		String[] values = rightAscensionString.trim().split(":");

		float hour = Float.parseFloat(values[0]);
		float min = Float.parseFloat(values[1]);
		float sec = Float.parseFloat(values[2]);

		float dayFraction = (hour / 24.0f) + (min / MINUTES_PER_DAY) + (sec / SECONDS_PER_DAY);
		angle = (float) (dayFraction * 2.0f * Math.PI);

		return angle;
	}

	public float parseDegMinSec(String degMinSecAngleString) {
		float angle = 0.0f;

		String[] values = degMinSecAngleString.trim().split(":");

		float deg = Float.parseFloat(values[0]);

		float sign = 1.0f;
		if (values[0].contains("-")) {
			sign = -1.0f;
		}

		float min = Float.parseFloat(values[1]);
		float sec = Float.parseFloat(values[2]);

		angle = Math.abs(deg) + (min / 60.0f) + (sec / 3600.0f);
		angle = sign * angle;
		angle = (float) Math.toRadians(angle);

		return angle;
	}

} // EnvironmentUtilitiesImpl