74 lines
2 KiB
C++
74 lines
2 KiB
C++
// UFO.hxx -- interface to the "UFO" flight model
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//
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// Written by Curtis Olson, started October 1999.
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// Slightly modified from MagicCarpet.hxx by Jonathan Polley, April 2002
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//
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// Copyright (C) 1999-2002 Curtis L. Olson - http://www.flightgear.org/~curt
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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#ifndef _UFO_HXX
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#define _UFO_HXX
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#include "flight.hxx"
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class FGUFO: public FGInterface {
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private:
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class lowpass {
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private:
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static double _dt;
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double _coeff;
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double _last;
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bool _initialized;
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public:
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lowpass(double coeff) : _coeff(coeff), _initialized(false) {}
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static inline void set_delta(double dt) { _dt = dt; }
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double filter(double value) {
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if (!_initialized) {
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_initialized = true;
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return _last = value;
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}
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double c = _dt / (_coeff + _dt);
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return _last = value * c + _last * (1.0 - c);
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}
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};
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lowpass *Throttle;
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lowpass *Aileron;
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lowpass *Elevator;
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lowpass *Rudder;
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lowpass *Aileron_Trim;
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lowpass *Elevator_Trim;
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lowpass *Rudder_Trim;
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SGPropertyNode_ptr Speed_Max;
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public:
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FGUFO( double dt );
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~FGUFO();
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// reset flight params to a specific position
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void init();
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// update position based on inputs, positions, velocities, etc.
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void update( double dt );
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};
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#endif // _UFO_HXX
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