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 10.10.1999 Christian Mayer added mutable for gcc 2.95 portability
36 11.10.1999 Christian Mayer changed set<> to map<> on Bernie Bright's
38 *****************************************************************************/
40 /****************************************************************************/
42 /****************************************************************************/
43 #ifndef FGVaporPressureItem_H
44 #define FGVaporPressureItem_H
46 /****************************************************************************/
48 /****************************************************************************/
49 #include "FGWeatherDefs.h"
51 //for the case that mutable isn't supported:
52 #include <simgear/compiler.h>
54 /****************************************************************************/
56 /****************************************************************************/
57 class FGVaporPressureItem;
58 FGVaporPressureItem operator-(const FGVaporPressureItem& arg);
60 /****************************************************************************/
61 /* CLASS DECLARATION */
62 /****************************************************************************/
63 class FGVaporPressureItem
66 mutable WeatherPrecision value;
72 FGVaporPressureItem(const WeatherPrecision& a, const WeatherPrecision& v) {alt = a; value = v;}
73 FGVaporPressureItem(const WeatherPrecision& v) {alt = 0.0; value = v;}
74 FGVaporPressureItem() {alt = 0.0; value = FG_WEATHER_DEFAULT_VAPORPRESSURE;}
76 WeatherPrecision getValue() const { return value; };
77 WeatherPrecision getAlt() const { return alt; };
79 FGVaporPressureItem& operator*= (const WeatherPrecision& arg);
80 FGVaporPressureItem& operator+= (const FGVaporPressureItem& arg);
81 FGVaporPressureItem& operator-= (const FGVaporPressureItem& arg);
83 friend bool operator<(const FGVaporPressureItem& arg1, const FGVaporPressureItem& arg2 );
84 friend FGVaporPressureItem operator-(const FGVaporPressureItem& arg);
88 inline FGVaporPressureItem& FGVaporPressureItem::operator*= (const WeatherPrecision& arg)
93 inline FGVaporPressureItem& FGVaporPressureItem::operator+= (const FGVaporPressureItem& arg)
99 inline FGVaporPressureItem& FGVaporPressureItem::operator-= (const FGVaporPressureItem& arg)
105 inline FGVaporPressureItem operator-(const FGVaporPressureItem& arg)
107 return FGVaporPressureItem(arg.alt, -arg.value);
110 /****************************************************************************/
111 #endif /*FGVaporPressureItem_H*/