4b5a80129d
1) The AIStorm sets the properties:
/environment/turbulence/magnitude-norm
/environment/turbulence/rate-hz
The actual turbulence effects are handled by the FDM.
If the effects are deemed unrealistic, then that will
have to be fixed in the FDM(s).
2) The zone of turbulence is cylindrical, and is centered
at the AIStorm's lat/lon. The diameter is set with
<diameter-ft>, the top with <height-msl>, the bottom is
assumed to be at <altitude> minus 1000 feet.
3) Note that the zone of turbulence may not match well with
the visual model of the storm. In this case I had to
x-offset the storm model by 4700 meters to match the zone
of turbulence. (i.e. the storm model is 4700m off center).
4) While I was in there I also increased the speed of the
lightning flashes to look more realistic.
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
// FGAIStorm - AIBase derived class creates an AI thunderstorm
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//
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// Written by David Culp, started Feb 2004.
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//
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// Copyright (C) 2004 David P. Culp - davidculp2@comcast.net
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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#ifndef _FG_AIStorm_HXX
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#define _FG_AIStorm_HXX
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#include "AIManager.hxx"
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#include "AIBase.hxx"
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#include <string>
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SG_USING_STD(string);
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class FGAIStorm : public FGAIBase {
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public:
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FGAIStorm(FGAIManager* mgr);
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~FGAIStorm();
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bool init();
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virtual void bind();
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virtual void unbind();
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void update(double dt);
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inline void setStrengthNorm( double s ) { strength_norm = s; };
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inline void setDiameter( double d ) { diameter = d; };
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inline void setHeight( double h ) { height = h; };
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inline double getStrengthNorm() const { return strength_norm; };
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inline double getDiameter() const { return diameter; };
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inline double getHeight() const { return height; };
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private:
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double dt;
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double diameter; // diameter of turbulence zone, in nm
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double height; // top of turbulence zone, in feet MSL
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double strength_norm; // strength of turbulence
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void Run(double dt);
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// lightning stuff
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double delay; // average time (sec) between lightning flashes
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int subflashes; // number of subflashes per flash
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double random_delay; // delay +/- random number
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double timer;
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SGPropertyNode* flash_node;
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int flashed; // number of subflashes already done this flash
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bool flashing; // true if currently flashing;
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int subflash_array[8];
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int subflash_index;
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// turbulence stuff
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SGPropertyNode* turb_mag_node;
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SGPropertyNode* turb_rate_node;
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};
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#endif // _FG_AIStorm_HXX
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