--- /dev/null
+// environment_ctrl.cxx -- manager for natural environment information.
+//
+// Written by David Megginson, started February 2002.
+//
+// Copyright (C) 2002 David Megginson - david@megginson.com
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+#include <simgear/debug/logstream.hxx>
+
+#include <stdlib.h>
+#include <Main/fg_props.hxx>
+
+#include "environment_ctrl.hxx"
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGEnvironmentCtrl abstract base class.
+////////////////////////////////////////////////////////////////////////
+
+FGEnvironmentCtrl::FGEnvironmentCtrl ()
+ : _environment(0),
+ _lon_deg(0),
+ _lat_deg(0),
+ _elev_ft(0)
+{
+}
+
+FGEnvironmentCtrl::~FGEnvironmentCtrl ()
+{
+}
+
+void
+FGEnvironmentCtrl::setEnvironment (FGEnvironment * environment)
+{
+ _environment = environment;
+}
+
+void
+FGEnvironmentCtrl::setLongitudeDeg (double lon_deg)
+{
+ _lon_deg = lon_deg;
+}
+
+void
+FGEnvironmentCtrl::setLatitudeDeg (double lat_deg)
+{
+ _lat_deg = lat_deg;
+}
+
+void
+FGEnvironmentCtrl::setElevationFt (double elev_ft)
+{
+ _elev_ft = elev_ft;
+}
+
+void
+FGEnvironmentCtrl::setPosition (double lon_deg, double lat_deg, double elev_ft)
+{
+ _lon_deg = lon_deg;
+ _lat_deg = lat_deg;
+ _elev_ft = elev_ft;
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGUserDefEnvironmentCtrl.
+////////////////////////////////////////////////////////////////////////
+
+FGUserDefEnvironmentCtrl::FGUserDefEnvironmentCtrl ()
+ : _base_wind_speed_node(0),
+ _gust_wind_speed_node(0),
+ _current_wind_speed_kt(0),
+ _delta_wind_speed_kt(0)
+{
+}
+
+FGUserDefEnvironmentCtrl::~FGUserDefEnvironmentCtrl ()
+{
+}
+
+void
+FGUserDefEnvironmentCtrl::init ()
+{
+ // Fill in some defaults.
+ if (!fgHasNode("/environment/params/base-wind-speed-kt"))
+ fgSetDouble("/environment/params/base-wind-speed-kt",
+ fgGetDouble("/environment/wind-speed-kt"));
+ if (!fgHasNode("/environment/params/gust-wind-speed-kt"))
+ fgSetDouble("/environment/params/gust-wind-speed-kt",
+ fgGetDouble("/environment/params/base-wind-speed-kt"));
+
+ _base_wind_speed_node =
+ fgGetNode("/environment/params/base-wind-speed-kt", true);
+ _gust_wind_speed_node =
+ fgGetNode("/environment/params/gust-wind-speed-kt", true);
+
+ _current_wind_speed_kt = _base_wind_speed_node->getDoubleValue();
+ _delta_wind_speed_kt = 0.1;
+}
+
+void
+FGUserDefEnvironmentCtrl::update (int dt)
+{
+ double base_wind_speed = _base_wind_speed_node->getDoubleValue();
+ double gust_wind_speed = _gust_wind_speed_node->getDoubleValue();
+
+ if (base_wind_speed == gust_wind_speed) {
+ _current_wind_speed_kt = base_wind_speed;
+ } else {
+ int rn = rand() % 128;
+ int sign = (_delta_wind_speed_kt < 0 ? -1 : 1);
+ double gust = _current_wind_speed_kt - base_wind_speed;
+ double incr = gust / 50;
+
+ if (rn == 0)
+ _delta_wind_speed_kt = - _delta_wind_speed_kt;
+ else if (rn < 4)
+ _delta_wind_speed_kt -= incr * sign;
+ else if (rn < 16)
+ _delta_wind_speed_kt += incr * sign;
+
+ _current_wind_speed_kt += _delta_wind_speed_kt;
+
+ if (_current_wind_speed_kt < base_wind_speed) {
+ _current_wind_speed_kt = base_wind_speed;
+ _delta_wind_speed_kt = 0.01;
+ } else if (_current_wind_speed_kt > gust_wind_speed) {
+ _current_wind_speed_kt = gust_wind_speed;
+ _delta_wind_speed_kt = -0.01;
+ }
+ }
+
+ if (_environment != 0)
+ _environment->set_wind_speed_kt(_current_wind_speed_kt);
+}
+
+// end of environment_ctrl.cxx
--- /dev/null
+// environment-ctrl.hxx -- controller for environment information.
+//
+// Written by David Megginson, started May 2002.
+//
+// Copyright (C) 2002 David Megginson - david@megginson.com
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+#ifndef _ENVIRONMENT_CTRL_HXX
+#define _ENVIRONMENT_CTRL_HXX
+
+#include <simgear/compiler.h>
+
+#ifdef SG_HAVE_STD_INCLUDES
+# include <cmath>
+#else
+# include <math.h>
+#endif
+
+class SGPropertyNode;
+
+#include "environment.hxx"
+
+
+\f
+/**
+ * Interface to control environment information for a specific location.
+ */
+class FGEnvironmentCtrl
+{
+
+public:
+
+ FGEnvironmentCtrl ();
+ virtual ~FGEnvironmentCtrl ();
+
+ virtual void setEnvironment (FGEnvironment * environment);
+
+ virtual FGEnvironment * getEnvironment () const { return _environment; }
+
+ virtual void setLongitudeDeg (double lon_deg);
+ virtual void setLatitudeDeg (double lat_deg);
+ virtual void setElevationFt (double elev_ft);
+ virtual void setPosition (double lon_deg, double lat_deg, double elev_ft);
+
+ virtual double getLongitudeDeg () const { return _lon_deg; }
+ virtual double getLatitudeDeg () const { return _lat_deg; }
+ virtual double getElevationFt () const { return _elev_ft; }
+
+ virtual void init () = 0;
+ virtual void update (int dt) = 0;
+
+protected:
+
+ FGEnvironment * _environment;
+ double _lon_deg;
+ double _lat_deg;
+ double _elev_ft;
+
+};
+
+
+\f
+/**
+ * Environment controller using user-supplied parameters.
+ */
+class FGUserDefEnvironmentCtrl : public FGEnvironmentCtrl
+{
+public:
+ FGUserDefEnvironmentCtrl ();
+ virtual ~FGUserDefEnvironmentCtrl ();
+
+ virtual void init ();
+ virtual void update (int dt);
+
+private:
+
+ SGPropertyNode * _base_wind_speed_node;
+ SGPropertyNode * _gust_wind_speed_node;
+
+ double _current_wind_speed_kt;
+ double _delta_wind_speed_kt;
+
+};
+
+#endif // _ENVIRONMENT_CTRL_HXX
#include <Main/fg_props.hxx>
#include <Aircraft/aircraft.hxx>
+#include "environment.hxx"
+#include "environment_ctrl.hxx"
#include "environment_mgr.hxx"
FGEnvironmentMgr::FGEnvironmentMgr ()
+ : _environment(new FGEnvironment),
+ _controller(new FGUserDefEnvironmentCtrl)
{
- _environment = new FGEnvironment();
}
FGEnvironmentMgr::~FGEnvironmentMgr ()
{
delete _environment;
+ delete _controller;
}
void
FGEnvironmentMgr::init ()
{
SG_LOG( SG_GENERAL, SG_INFO, "Initializing environment subsystem");
+ _controller->setEnvironment(_environment);
+ _controller->init();
}
void
void
FGEnvironmentMgr::update (int dt)
{
+ _controller->update(dt);
// FIXME: the FDMs should update themselves
current_aircraft.fdm_state
->set_Velocities_Local_Airmass(_environment->get_wind_from_north_fps(),
projects / flightgear.git / commitdiff