mirror of
https://github.com/GoldenCheetah/GoldenCheetah.git
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59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
/*
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* Copyright (c) 2014 Mark Liversedge (liversedge@gmail.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "Units.h"
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#include <cmath>
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QString kphToPace(double kph, bool metric)
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{
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// return a min/mile or min/kph string
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if (!metric) kph /= KM_PER_MILE;
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// stop silly stuff
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if (kph < 0.1) {
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return "00:00";
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}
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if (kph > 99) {
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return "xx:xx";
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}
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// now how many minutes to do 1 ?
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double pace = 60.00f / kph;
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int minutes = pace; // rounds down
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int seconds = round((pace - (double)minutes) * 60.00f);
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// ugh. 8min miles becomes 7:60 ! bloody rounding !
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if (seconds >= 60) {
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seconds = 0;
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minutes++;
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}
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return QString("%1:%2")
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.arg(minutes, 2, 10, QLatin1Char('0'))
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.arg(seconds, 2, 10, QLatin1Char('0'));
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}
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QString mphToPace(double mph, bool metric)
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{
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// convert to kph and then use kph function
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double kph = mph * KM_PER_MILE;
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return kphToPace(kph, metric);
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}
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