1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 Module: FGCoefficient.cpp
6 Purpose: Encapsulates the stability derivative class FGCoefficient;
9 ------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
11 This program is free software; you can redistribute it and/or modify it under
12 the terms of the GNU General Public License as published by the Free Software
13 Foundation; either version 2 of the License, or (at your option) any later
16 This program is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
21 You should have received a copy of the GNU General Public License along with
22 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
23 Place - Suite 330, Boston, MA 02111-1307, USA.
25 Further information about the GNU General Public License can also be found on
26 the world wide web at http://www.gnu.org.
28 FUNCTIONAL DESCRIPTION
29 --------------------------------------------------------------------------------
30 This class models the stability derivative coefficient lookup tables or
31 equations. Note that the coefficients need not be calculated each delta-t.
33 Note that the values in a row which index into the table must be the same value
34 for each column of data, so the first column of numbers for each altitude are
35 seen to be equal, and there are the same number of values for each altitude.
37 See the header file FGCoefficient.h for the values of the identifiers.
40 --------------------------------------------------------------------------------
43 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
45 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
47 #include "FGCoefficient.h"
49 #include "FGFDMExec.h"
50 #include "FGPropertyManager.h"
53 # if defined(sgi) && !defined(__GNUC__)
62 static const char *IdSrc = "$Id$";
63 static const char *IdHdr = ID_COEFFICIENT;
65 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
67 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
69 FGCoefficient::FGCoefficient( FGFDMExec* fdex )
72 State = FDMExec->GetState();
75 PropertyManager = FDMExec->GetPropertyManager();
78 LookupR = LookupC = 0;
98 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
100 FGCoefficient::~FGCoefficient()
102 if (Table) delete Table;
106 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
108 bool FGCoefficient::Load(FGConfigFile *AC_cfg)
114 name = AC_cfg->GetValue("NAME");
115 method = AC_cfg->GetValue("TYPE");
116 AC_cfg->GetNextConfigLine();
117 *AC_cfg >> description;
119 if (method == "EQUATION") type = EQUATION;
120 else if (method == "TABLE") type = TABLE;
121 else if (method == "VECTOR") type = VECTOR;
122 else if (method == "VALUE") type = VALUE;
125 if (type == VECTOR || type == TABLE) {
129 Table = new FGTable(rows, columns);
131 Table = new FGTable(rows);
134 *AC_cfg >> multparmsRow;
135 prop = State->GetPropertyName( multparmsRow );
136 LookupR = PropertyManager->GetNode( prop );
140 *AC_cfg >> multparmsCol;
141 prop = State->GetPropertyName( multparmsCol );
143 LookupC = PropertyManager->GetNode( prop );
146 // Here, read in the line of the form (e.g.) FG_MACH|FG_QBAR|FG_ALPHA
147 // where each non-dimensionalizing parameter for this coefficient is
148 // separated by a | character
150 *AC_cfg >> multparms;
152 end = multparms.length();
153 n = multparms.find("|");
156 if (multparms != string("FG_NONE")) {
157 while (n < end && n >= 0) {
159 mult = multparms.substr(start,n);
160 prop= State->GetPropertyName( mult );
161 multipliers.push_back( PropertyManager->GetNode(prop) );
163 n = multparms.find("|",start);
165 prop=State->GetPropertyName( multparms.substr(start,n) );
166 mult = multparms.substr(start,n);
167 multipliers.push_back( PropertyManager->GetNode(prop) );
168 // End of non-dimensionalizing parameter read-in
172 *AC_cfg >> StaticValue;
173 } else if (type == VECTOR || type == TABLE) {
176 cerr << "Unimplemented coefficient type: " << type << endl;
179 AC_cfg->GetNextConfigLine();
180 FGCoefficient::Debug(2);
190 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
192 double FGCoefficient::Value(double rVal, double cVal)
197 SD = Value = gain*Table->GetValue(rVal, cVal) + bias;
199 for (midx=0; midx < multipliers.size(); midx++) {
200 Value *= multipliers[midx]->getDoubleValue();
205 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
207 double FGCoefficient::Value(double Val)
211 SD = Value = gain*Table->GetValue(Val) + bias;
213 for (unsigned int midx=0; midx < multipliers.size(); midx++)
214 Value *= multipliers[midx]->getDoubleValue();
219 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
221 double FGCoefficient::Value(void)
225 SD = Value = gain*StaticValue + bias;
227 for (unsigned int midx=0; midx < multipliers.size(); midx++)
228 Value *= multipliers[midx]->getDoubleValue();
233 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
235 double FGCoefficient::TotalValue(void)
244 totalValue = Value();
248 totalValue = Value( LookupR->getDoubleValue() );
252 totalValue = Value( LookupR->getDoubleValue(),
253 LookupC->getDoubleValue() );
263 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
265 void FGCoefficient::DisplayCoeffFactors(void)
269 cout << " Non-Dimensionalized by: ";
271 if (multipliers.size() == 0) {
272 cout << "none" << endl;
274 for (i=0; i<multipliers.size(); i++)
275 cout << multipliers[i]->getName() << " ";
280 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
282 string FGCoefficient::GetSDstring(void)
287 sprintf(buffer,"%9.6f",SD);
288 value = string(buffer);
292 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
294 void FGCoefficient::bind(FGPropertyManager *parent)
299 node=parent->GetNode(name,true);
301 node->SetString("description",description);
302 if (LookupR) node->SetString("row-parm",LookupR->getName() );
303 if (LookupC) node->SetString("column-parm",LookupC->getName() );
306 if (multipliers.size() == 0)
309 for (i=0; i<multipliers.size(); i++) {
310 mult += multipliers[i]->getName();
311 if ( i < multipliers.size()-1 ) mult += " ";
313 node->SetString("multipliers",mult);
315 node->Tie("SD-norm",this,&FGCoefficient::GetSD );
316 node->Tie("value-lbs",this,&FGCoefficient::GetValue );
318 node->Tie("bias", this, &FGCoefficient::getBias,
319 &FGCoefficient::setBias );
321 node->Tie("gain", this, &FGCoefficient::getGain,
322 &FGCoefficient::setGain );
326 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
328 void FGCoefficient::unbind(void)
330 node->Untie("SD-norm");
331 node->Untie("value-lbs");
336 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
337 // The bitmasked value choices are as follows:
338 // unset: In this case (the default) JSBSim would only print
339 // out the normally expected messages, essentially echoing
340 // the config files as they are read. If the environment
341 // variable is not set, debug_lvl is set to 1 internally
342 // 0: This requests JSBSim not to output any messages
344 // 1: This value explicity requests the normal JSBSim
346 // 2: This value asks for a message to be printed out when
347 // a class is instantiated
348 // 4: When this value is set, a message is displayed when a
349 // FGModel object executes its Run() method
350 // 8: When this value is set, various runtime state variables
351 // are printed out periodically
352 // 16: When set various parameters are sanity checked and
353 // a message is printed out when they go out of bounds
355 void FGCoefficient::Debug(int from)
357 if (debug_lvl <= 0) return;
359 if (debug_lvl & 1) { // Standard console startup message output
361 if (from == 2) { // Loading
362 cout << "\n " << highint << underon << name << underoff << normint << endl;
363 cout << " " << description << endl;
364 cout << " " << method << endl;
366 if (type == VECTOR || type == TABLE) {
367 cout << " Rows: " << rows << " ";
369 cout << "Cols: " << columns;
371 cout << endl << " Row indexing parameter: " << LookupR->getName() << endl;
375 cout << " Column indexing parameter: " << LookupC->getName() << endl;
379 cout << " Value = " << StaticValue << endl;
380 } else if (type == VECTOR || type == TABLE) {
384 DisplayCoeffFactors();
387 if (debug_lvl & 2 ) { // Instantiation/Destruction notification
388 if (from == 0) cout << "Instantiated: FGCoefficient" << endl;
389 if (from == 1) cout << "Destroyed: FGCoefficient" << endl;
391 if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
393 if (debug_lvl & 8 ) { // Runtime state variables
395 if (debug_lvl & 16) { // Sanity checking
397 if (debug_lvl & 64) {
398 if (from == 0) { // Constructor
399 cout << IdSrc << endl;
400 cout << IdHdr << endl;