mirror of
https://github.com/f4exb/sdrangel.git
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338 lines
9.7 KiB
C++
338 lines
9.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Jon Beniston, M7RCE //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_UNITS_H
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#define INCLUDE_UNITS_H
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#include <cmath>
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#include <QString>
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#include <QStringList>
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#include <QRegExp>
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#include <QDebug>
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#include "export.h"
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// Unit conversions
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class SDRBASE_API Units
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{
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public:
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static inline float feetToMetres(float feet)
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{
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return feet * 0.3048f;
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}
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static inline int feetToIntegerMetres(float feet)
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{
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return (int)std::round(feetToMetres(feet));
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}
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static inline float metresToFeet(float metres)
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{
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return metres * 3.28084f;
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}
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static inline int metresToIntegerFeet(float metres)
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{
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return (int)std::round(metresToFeet(metres));
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}
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static inline float nauticalMilesToMetres(float nauticalMiles)
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{
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return nauticalMiles * 1855.0f;
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}
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static inline int nauticalMilesToIntegerMetres(float nauticalMiles)
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{
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return (int)std::round(nauticalMilesToMetres(nauticalMiles));
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}
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static float knotsToKPH(float knots)
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{
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return knots * 1.852f;
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}
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static int knotsToIntegerKPH(float knots)
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{
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return (int)std::round(knotsToKPH(knots));
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}
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static float knotsToMPH(float knots)
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{
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return knots * 1.15078f;
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}
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static int knotsToIntegerMPH(float knots)
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{
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return (int)std::round(knotsToMPH(knots));
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}
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static float knotsToMetresPerSecond(float knots)
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{
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return knots * 0.514444f;
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}
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static float kmpsToKPH(float kps)
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{
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return kps * (60.0 * 60.0);
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}
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static int kmpsToIntegerKPH(float kps)
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{
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return (int)std::round(kmpsToKPH(kps));
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}
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static float feetPerMinToMetresPerSecond(float fpm)
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{
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return fpm * 0.00508f;
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}
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static int feetPerMinToIntegerMetresPerSecond(float fpm)
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{
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return (int)std::round(feetPerMinToMetresPerSecond(fpm));
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}
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template <class T>
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static T degreesToRadians(T degrees)
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{
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return degrees * ((T)M_PI) / 180.0f;
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}
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template <class T>
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static T radiansToDegrees(T radians)
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{
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return radians * 180.0f / ((T)M_PI);
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}
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static float fahrenheitToCelsius(float fahrenheit)
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{
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return (fahrenheit - 32.0f) * (5.0f/9.0f);
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}
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static float celsiusToKelvin(float celsius)
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{
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return celsius + 273.15f;
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}
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static float inchesToMilimetres(float inches)
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{
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return inches * 25.4f;
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}
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static float milesToKilometres(float miles)
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{
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return miles * 1.60934f;
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}
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static float degreesMinutesSecondsToDecimal(int degrees, int minutes, float seconds)
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{
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float dec = std::abs(degrees) + minutes * 1.0f/60.0f + seconds * 1.0f/(60.0f*60.0f);
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if (degrees < 0)
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return -dec;
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else
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return dec;
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}
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static float hoursMinutesSecondsToDecimal(int hours, int minutes, float seconds)
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{
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return hours + minutes * 1.0f/60.0f + seconds * 1.0f/(60.0f*60.0f);
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}
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// Also supports decimal degrees
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static bool degreeMinuteAndSecondsToDecimalDegrees(const QString& string, float& degrees)
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{
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QRegExp decimal("(-?[0-9]+(\\.[0-9]+)?)");
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if (decimal.exactMatch(string))
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{
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degrees = decimal.capturedTexts()[1].toFloat();
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return true;
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}
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QRegExp dms(QString("(-)?([0-9]+)[%1d](([0-9]+)['m](([0-9]+(\\.[0-9]+)?)[\"s])?)?").arg(QChar(0xb0)));
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if (dms.exactMatch(string))
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{
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float d = 0.0f;
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bool neg = false;
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for (int i = 0; i < dms.captureCount(); i++) {
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qDebug() << dms.capturedTexts()[i];
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}
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if (dms.captureCount() >= 1) {
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neg = dms.capturedTexts()[1] == "-";
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}
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if (dms.captureCount() >= 3) {
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d = dms.capturedTexts()[2].toFloat();
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}
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float m = 0.0f;
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if (dms.captureCount() >= 5) {
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m = dms.capturedTexts()[4].toFloat();
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}
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float s = 0.0f;
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if (dms.captureCount() >= 7) {
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s = dms.capturedTexts()[6].toFloat();
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}
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qDebug() << neg << d << m << s;
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degrees = d + m/60.0 + s/(60.0*60.0);
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if (neg) {
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degrees = -degrees;
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}
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return true;
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}
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return false;
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}
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static QString decimalDegreesToDegreeMinutesAndSeconds(float decimal, int secondsFieldWidth=5)
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{
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double v, d, m, s;
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int neg;
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v = decimal;
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neg = v < 0.0f;
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v = fabs(v);
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d = floor(v);
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v -= d;
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v *= 60.0;
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m = floor(v);
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v -= m;
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v *= 60.0;
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s = v;
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return QString("%1%2%3%4'%5\"").arg(neg ? "-" : "").arg((int)d).arg(QChar(0xb0)).arg((int)m, 2, 10, QChar('0')).arg(s, secondsFieldWidth, 'f', 2, QChar('0'));
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}
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static QString decimalDegreesToDegreesAndMinutes(float decimal)
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{
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double v, d, m;
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int neg;
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v = decimal;
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neg = v < 0.0f;
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v = fabs(v);
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d = floor(v);
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v -= d;
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v *= 60.0;
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m = round(v);
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if (m == 60)
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{
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if (neg) {
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d--;
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} else {
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d++;
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}
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m = 0;
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}
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return QString("%1%2%3%4'").arg(neg ? "-" : "").arg((int)d).arg(QChar(0xb0)).arg((int)m, 2, 10, QChar('0'));
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}
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static QString decimalDegreesToDegrees(float decimal)
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{
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double v, d;
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int neg;
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v = decimal;
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neg = v < 0.0f;
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v = fabs(v);
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d = round(v);
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return QString("%1%2%3").arg(neg ? "-" : "").arg((int)d).arg(QChar(0xb0));
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}
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static QString decimalHoursToHoursMinutesAndSeconds(float decimal, int precision=2)
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{
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double v, h, m, s;
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v = decimal;
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v = fabs(v);
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h = floor(v);
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v -= h;
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v *= 60.0;
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m = floor(v);
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v -= m;
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v *= 60.0;
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s = v;
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return QString("%1h%2m%3s").arg((int)h).arg((int)m, 2, 10, QChar('0')).arg(s, 2, 'f', precision, QChar('0'));
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}
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// Try to convert a string to latitude and longitude. Returns false if not recognised format.
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// https://en.wikipedia.org/wiki/ISO_6709 specifies a standard syntax
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// We support both decimal and DMS formats
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static bool stringToLatitudeAndLongitude(const QString& string, float& latitude, float& longitude)
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{
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QRegExp decimal("(-?[0-9]+\\.[0-9]+) *,? *(-?[0-9]+\\.[0-9]+)");
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if (decimal.exactMatch(string))
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{
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latitude = decimal.capturedTexts()[1].toFloat();
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longitude = decimal.capturedTexts()[2].toFloat();
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return true;
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}
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QRegExp dms(QString("([0-9]+)[%1d]([0-9]+)['m]([0-9]+(\\.[0-9]+)?)[\"s]([NS]) *,? *([0-9]+)[%1d]([0-9]+)['m]([0-9]+(\\.[0-9]+)?)[\"s]([EW])").arg(QChar(0xb0)));
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if (dms.exactMatch(string))
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{
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float latD = dms.capturedTexts()[1].toFloat();
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float latM = dms.capturedTexts()[2].toFloat();
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float latS = dms.capturedTexts()[3].toFloat();
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bool north = dms.capturedTexts()[5] == "N";
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float lonD = dms.capturedTexts()[6].toFloat();
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float lonM = dms.capturedTexts()[7].toFloat();
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float lonS = dms.capturedTexts()[8].toFloat();
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bool east = dms.capturedTexts()[10] == "E";
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latitude = latD + latM/60.0 + latS/(60.0*60.0);
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if (!north)
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latitude = -latitude;
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longitude = lonD + lonM/60.0 + lonS/(60.0*60.0);
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if (!east)
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longitude = -longitude;
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return true;
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}
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return false;
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}
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static float solarFluxUnitsToJansky(float sfu)
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{
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return sfu * 10000.0f;
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}
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template <class T>
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static T solarFluxUnitsToWattsPerMetrePerHertz(T sfu)
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{
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return sfu * 1e-22f;
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}
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template <class T>
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static T wattsPerMetrePerHertzToSolarFluxUnits(T w)
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{
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return w / 1e-22f;
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}
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template <class T>
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static T wattsPerMetrePerHertzToJansky(T w)
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{
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return w / 1e-26f;
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}
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template <class T>
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static T noiseFigureToNoiseTemp(T nfdB, T refTempK=T(290.0))
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{
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return refTempK * (std::pow(T(10.0), nfdB/T(10.0)) - T(1.0));
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}
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template <class T>
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static T noiseTempToNoiseFigureTo(T tempK, T refTempK=T(290.0))
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{
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return T(10.0) * std::log10(tempK/refTempK+T(1.0));
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}
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};
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#endif // INCLUDE_UNITS_H
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