workspace/plasma/dataengines/weather/ions/formulas.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Shawn Starr <shawn.starr@rogers.com>            *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA          *
  18  ***************************************************************************/
  19
  20 #include "formulas.h"
  21 #include <math.h>
  22
  23 namespace WeatherFormula
  24 {
  25
  26 float celsiusToF(float temperature)
  27 {
  28     return (temperature * 9 / 5 + 32);
  29 }
  30
  31 float fahrenheitToC(float temperature)
  32 {
  33     return (temperature - 32) * 5 / 9;
  34 }
  35
  36 float milesToKM(float miles)
  37 {
  38     return (1.609344 * miles);
  39 }
  40
  41 float kilometersToMI(float km)
  42 {
  43     return (0.621371192 * km);
  44 }
  45
  46 float kilopascalsToInches(float kpa)
  47 {
  48     return ((0.02952997 * kpa) * 10);
  49 }
  50
  51 float inchesToKilopascals(float inches)
  52 {
  53     return (inches * 3.386389);
  54 }
  55
  56 float millibarsToInches(float millibar)
  57 {
  58     return (millibar * 0.0295301);
  59 }
  60
  61 float millibarsToKilopascals(float millibar)
  62 {
  63     return (millibar * 0.10);
  64 }
  65
  66 float centimetersToIN(float cm)
  67 {
  68     return (cm * 0.393700787);
  69 }
  70
  71 float inchesToCM(float inch)
  72 {
  73     return (inch * 2.54);
  74 }
  75
  76 float millimetersToIN(float mm)
  77 {
  78     return (mm * 0.0393700787);
  79 }
  80
  81 float inchesToMM(float inch)
  82 {
  83     return (inch * 25.4);
  84 }
  85
  86 float kilometersToMS(float km)
  87 {
  88     return (km * 0.277778);
  89 }
  90
  91 float milesToMS(float miles)
  92 {
  93     return (miles * 0.44704);
  94 }
  95
  96 float knotsToMS(float knots)
  97 {
  98     return (knots * 1.9438);
  99 }
 100
 101 float knotsToKM(float knots)
 102 {
 103     return floor(knots * 1.852 + 0.5);
 104 }
 105
 106 float kilometersToKT(float km)
 107 {
 108     return (km * 0.539956803);
 109 }
 110
 111 float milesToKT(float miles)
 112 {
 113     return (miles * 0.868976242);
 114 }
 115 float knotsToMI(float knots)
 116 {
 117     return (knots * 1.507794);
 118 }
 119
 120 int knotsToBF(float knots)
 121 {
 122     if (knots < 1) {
 123         return 0;
 124     } else if (knots >= 1 && knots < 4) {
 125         return 1;
 126     } else if (knots >= 4 && knots < 7) {
 127         return 2;
 128     } else if (knots >= 7 && knots < 11) {
 129         return 3;
 130     } else if (knots >= 11 && knots < 16) {
 131         return 4;
 132     } else if (knots >= 16 && knots < 22) {
 133         return 5;
 134     } else if (knots >= 22 && knots < 28) {
 135         return 6;
 136     } else if (knots >= 28 && knots < 34) {
 137         return 7;
 138     } else if (knots >= 34 && knots < 41) {
 139         return 8;
 140     } else if (knots >= 41 && knots < 48) {
 141         return 9;
 142     } else if (knots >= 48 && knots < 56) {
 143         return 10;
 144     } else if (knots >= 56 && knots < 64) {
 145         return 11;
 146     } else {
 147         return 12;
 148     }
 149 }
 150
 151 int milesToBF(float miles)
 152 {
 153     return knotsToBF(miles / 1.1507794);
 154 }
 155
 156 int kilometersToBF(float km)
 157 {
 158     return knotsToBF(km / 1.852);
 159 }
 160
 161 } // namespace WeatherFormula
 162