| /******************************************************************************* |
| * 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.addons.telecoms.impl; |
| |
| public class SimpleConicalRadiationPatternCustomImpl extends SimpleConicalRadiationPatternImpl { |
| |
| protected double maxGain = Double.NaN; |
| |
| @Override |
| public void setApexAngle(double newApexAngle) { |
| super.setApexAngle(newApexAngle); |
| this.maxGain = computeMaximumGain(); |
| } |
| |
| @Override |
| public double computeGain(double theta, double phi) { |
| // Checks to see if the direction falls inside the cone. |
| if (theta <= (getApexAngle() / 2.0)) { |
| return getMaxGain(); |
| } else { |
| return Double.NEGATIVE_INFINITY; |
| } |
| } |
| |
| private double getMaxGain() { |
| if (Double.isNaN(this.maxGain)) { |
| this.maxGain = computeMaximumGain(); |
| } |
| |
| return this.maxGain; |
| } |
| |
| private double computeMaximumGain() { |
| double coneSolidAngle = Math.PI * 2.0 * (1.0 - Math.cos(getApexAngle() / 2.0)); |
| double apertureRatio = 4 * Math.PI / coneSolidAngle; |
| double gain = 10.0 * Math.log10(apertureRatio); |
| return gain; |
| } |
| } // SimpleConicalRadiationPatternImpl |
