1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 Module: FGAerodynamics.cpp
6 Purpose: Encapsulates the aerodynamic forces (gear and collision)
8 ------------- Copyright (C) 2000 Jon S. Berndt (jsb@hal-pc.org) -------------
10 This program is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free Software
12 Foundation; either version 2 of the License, or (at your option) any later
15 This program is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 You should have received a copy of the GNU General Public License along with
21 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
22 Place - Suite 330, Boston, MA 02111-1307, USA.
24 Further information about the GNU General Public License can also be found on
25 the world wide web at http://www.gnu.org.
27 FUNCTIONAL DESCRIPTION
28 --------------------------------------------------------------------------------
31 --------------------------------------------------------------------------------
33 04/22/01 JSB Moved code into here from FGAircraft
35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
37 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
39 #include "FGAerodynamics.h"
40 #include "FGFactorGroup.h"
41 #include "FGCoefficient.h"
43 static const char *IdSrc = "$Id$";
44 static const char *IdHdr = ID_AERODYNAMICS;
46 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
48 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
51 FGAerodynamics::FGAerodynamics(FGFDMExec* FDMExec) : FGModel(FDMExec)
53 Name = "FGAerodynamics";
62 Coeff = new CoeffArray[6];
64 if (debug_lvl & 2) cout << "Instantiated: FGAerodynamics" << endl;
67 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
69 FGAerodynamics::~FGAerodynamics()
73 for (j=0; j<Coeff[i].size(); j++) {
79 if (debug_lvl & 2) cout << "Destroyed: FGAerodynamics" << endl;
82 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
84 bool FGAerodynamics::Run(void)
86 unsigned int axis_ctr,ctr;
88 if (!FGModel::Run()) {
93 for (axis_ctr = 0; axis_ctr < 3; axis_ctr++) {
94 for (ctr=0; ctr < Coeff[axis_ctr].size(); ctr++) {
95 vFs(axis_ctr+1) += Coeff[axis_ctr][ctr]->TotalValue();
98 //correct signs of drag and lift to wind axes convention
99 //positive forward, right, down
100 vFs(1)*=-1; vFs(3)*=-1;
101 //cout << "Aircraft::vFs: " << vFs << endl;
102 vForces = State->GetTs2b()*vFs;
104 vDXYZcg(eX) = -(Aircraft->GetXYZrp(eX)
105 - MassBalance->GetXYZcg(eX))*inchtoft;
106 vDXYZcg(eY) = (Aircraft->GetXYZrp(eY)
107 - MassBalance->GetXYZcg(eY))*inchtoft;
108 vDXYZcg(eZ) = -(Aircraft->GetXYZrp(eZ)
109 - MassBalance->GetXYZcg(eZ))*inchtoft;
111 vMoments = vDXYZcg*vForces; // M = r X F
113 for (axis_ctr = 0; axis_ctr < 3; axis_ctr++) {
114 for (ctr = 0; ctr < Coeff[axis_ctr+3].size(); ctr++) {
115 vMoments(axis_ctr+1) += Coeff[axis_ctr+3][ctr]->TotalValue();
124 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
126 bool FGAerodynamics::Load(FGConfigFile* AC_cfg)
130 AC_cfg->GetNextConfigLine();
132 while ((token = AC_cfg->GetValue()) != string("/AERODYNAMICS")) {
133 if (token == "AXIS") {
135 axis = AC_cfg->GetValue("NAME");
136 AC_cfg->GetNextConfigLine();
137 while ((token = AC_cfg->GetValue()) != string("/AXIS")) {
138 if( token == "COEFFICIENT" ) {
139 ca.push_back( new FGCoefficient(FDMExec) );
140 ca.back()->Load(AC_cfg);
141 } else if ( token == "GROUP" ) {
142 ca.push_back( new FGFactorGroup(FDMExec) );
143 ca.back()->Load(AC_cfg);
146 Coeff[AxisIdx[axis]] = ca;
147 AC_cfg->GetNextConfigLine();
154 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
156 string FGAerodynamics::GetCoefficientStrings(void)
158 string CoeffStrings = "";
159 bool firstime = true;
160 unsigned int axis, sd;
162 for (axis = 0; axis < 6; axis++) {
163 for (sd = 0; sd < Coeff[axis].size(); sd++) {
167 CoeffStrings += ", ";
169 CoeffStrings += Coeff[axis][sd]->GetCoefficientStrings();
175 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
177 string FGAerodynamics::GetCoefficientValues(void)
179 string SDValues = "";
180 bool firstime = true;
182 for (unsigned int axis = 0; axis < 6; axis++) {
183 for (unsigned int sd = 0; sd < Coeff[axis].size(); sd++) {
189 SDValues += Coeff[axis][sd]->GetCoefficientValues();
196 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
198 double FGAerodynamics::GetLoD(void)
200 if (vFs(1) != 0.00) return vFs(3)/vFs(1);
204 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
206 void FGAerodynamics::Debug(int from)
208 //TODO: Add your source code here