1 /*****************************************************************************
3 Header: FGVaporPressureItem.h
4 Author: Christian Mayer
7 ---------- Copyright (C) 1999 Christian Mayer (vader@t-online.de) ----------
9 This program is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free Software
11 Foundation; either version 2 of the License, or (at your option) any later
14 This program is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
19 You should have received a copy of the GNU General Public License along with
20 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21 Place - Suite 330, Boston, MA 02111-1307, USA.
23 Further information about the GNU General Public License can also be found on
24 the world wide web at http://www.gnu.org.
26 FUNCTIONAL DESCRIPTION
27 ------------------------------------------------------------------------------
28 Vapor pressure item that is stored in the micro weather class
31 ------------------------------------------------------------------------------
32 28.05.1999 Christian Mayer Created
33 16.06.1999 Durk Talsma Portability for Linux
34 20.06.1999 Christian Mayer added lots of consts
35 *****************************************************************************/
37 /****************************************************************************/
39 /****************************************************************************/
40 #ifndef FGVaporPressureItem_H
41 #define FGVaporPressureItem_H
43 /****************************************************************************/
45 /****************************************************************************/
46 #include "FGWeatherDefs.h"
48 /****************************************************************************/
50 /****************************************************************************/
51 class FGVaporPressureItem;
52 FGVaporPressureItem operator-(const FGVaporPressureItem& arg);
54 /****************************************************************************/
55 /* CLASS DECLARATION */
56 /****************************************************************************/
57 class FGVaporPressureItem
60 WeatherPrecition value;
66 FGVaporPressureItem(const WeatherPrecition& a, const WeatherPrecition& v) {alt = a; value = v;}
67 FGVaporPressureItem(const WeatherPrecition& v) {alt = 0.0; value = v;}
68 FGVaporPressureItem() {alt = 0.0; value = FG_WEATHER_DEFAULT_VAPORPRESSURE;}
70 WeatherPrecition getValue() const { return value; };
71 WeatherPrecition getAlt() const { return alt; };
73 FGVaporPressureItem& operator*= (const WeatherPrecition& arg);
74 FGVaporPressureItem& operator+= (const FGVaporPressureItem& arg);
75 FGVaporPressureItem& operator-= (const FGVaporPressureItem& arg);
77 friend bool operator<(const FGVaporPressureItem& arg1, const FGVaporPressureItem& arg2 );
78 friend FGVaporPressureItem operator-(const FGVaporPressureItem& arg);
82 inline FGVaporPressureItem& FGVaporPressureItem::operator*= (const WeatherPrecition& arg)
87 inline FGVaporPressureItem& FGVaporPressureItem::operator+= (const FGVaporPressureItem& arg)
93 inline FGVaporPressureItem& FGVaporPressureItem::operator-= (const FGVaporPressureItem& arg)
99 inline FGVaporPressureItem operator-(const FGVaporPressureItem& arg)
101 return FGVaporPressureItem(arg.alt, -arg.value);
104 /****************************************************************************/
105 #endif /*FGVaporPressureItem_H*/