1 // presets.cxx -- Wrap environment presets
3 // Written by Torsten Dreyer, January 2011
5 // Copyright (C) 2010 Torsten Dreyer Torsten(at)t3r(dot)de
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 #include "presets.hxx"
28 #include <simgear/math/SGMisc.hxx>
29 #include <Main/fg_props.hxx>
31 namespace Environment {
34 PresetBase::PresetBase( const char * overrideNodePath )
35 : _overrideNodePath( overrideNodePath )
39 void PresetBase::setOverride( bool value )
42 Don't initialize node in constructor because the class is used as a singleton
43 and created as a static variable in the initialization sequence when globals()
44 is not yet initialized and returns null.
46 if( _overrideNode == NULL )
47 _overrideNode = fgGetNode( _overrideNodePath.c_str(), true );
48 _overrideNode->setBoolValue( value );
53 PresetBase("/environment/config/presets/wind-override")
58 void Wind::preset( double min_hdg, double max_hdg, double speed_kt, double gust_kt )
60 // see: PresetBase::setOverride()
62 //TODO: handle variable wind and gusts
63 if( _fromNorthNode == NULL )
64 _fromNorthNode = fgGetNode("/environment/config/presets/wind-from-north-fps", true );
66 if( _fromEastNode == NULL )
67 _fromEastNode = fgGetNode("/environment/config/presets/wind-from-east-fps", true );
69 double avgHeading_rad =
70 SGMiscd::normalizeAngle2(
71 (SGMiscd::normalizeAngle(min_hdg*SG_DEGREES_TO_RADIANS) +
72 SGMiscd::normalizeAngle(max_hdg*SG_DEGREES_TO_RADIANS))/2);
74 double speed_fps = speed_kt * SG_NM_TO_METER * SG_METER_TO_FEET / 3600.0;
75 _fromNorthNode->setDoubleValue( speed_fps * cos(avgHeading_rad) );
76 _fromEastNode->setDoubleValue( speed_fps * sin(avgHeading_rad) );
80 Visibility::Visibility() :
81 PresetBase("/environment/config/presets/visibility-m-override")
85 void Visibility::preset( double visibility_m )
87 // see: PresetBase::setOverride()
88 if( _visibilityNode == NULL )
89 _visibilityNode = fgGetNode("/environment/config/presets/visibility-m", true );
91 _visibilityNode->setDoubleValue(visibility_m );
95 Turbulence::Turbulence() :
96 PresetBase("/environment/config/presets/turbulence-magnitude-norm-override")
101 void Turbulence::preset(double magnitude_norm)
103 // see: PresetBase::setOverride()
104 if( _magnitudeNode == NULL )
105 _magnitudeNode = fgGetNode("/environment/config/presets/turbulence-magnitude-norm", true );
107 _magnitudeNode->setDoubleValue( magnitude_norm );
112 PresetBase("/environment/config/presets/ceiling-override")
117 void Ceiling::preset( double elevation, double thickness )
119 // see: PresetBase::setOverride()
120 if( _elevationNode == NULL )
121 _elevationNode = fgGetNode("/environment/config/presets/ceiling-elevation-ft", true);
123 if( _thicknessNode == NULL )
124 _thicknessNode = fgGetNode("/environment/config/presets/ceiling-elevation-ft", true);
126 _elevationNode->setDoubleValue( elevation );
127 _thicknessNode->setDoubleValue( thickness );
131 } // namespace Presets
132 } // namespace Environment