Date started: 07/01/01
Purpose: Encapsulates the JSBBase object
- ------------- Copyright (C) 2001 Jon S. Berndt (jsb@hal-pc.org) -------------
+ ------------- Copyright (C) 2001 Jon S. Berndt (jon@jsbsim.org) -------------
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
+ the terms of the GNU Lesser 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
+ FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.
- You should have received a copy of the GNU General Public License along with
+ You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA.
- Further information about the GNU General Public License can also be found on
+ Further information about the GNU Lesser General Public License can also be found on
the world wide web at http://www.gnu.org.
FUNCTIONAL DESCRIPTION
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+#define BASE
+
#include "FGJSBBase.h"
+#include <iostream>
+#include <sstream>
+#include <cstdlib>
+
+namespace JSBSim {
-static const char *IdSrc = "$Id$";
-static const char *IdHdr = ID_JSBBASE;
+IDENT(IdSrc,"$Id: FGJSBBase.cpp,v 1.38 2014/01/13 10:45:59 ehofman Exp $");
+IDENT(IdHdr,ID_JSBBASE);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
-char FGJSBBase::highint[5] = {27, '[', '1', 'm', '\0' };
-char FGJSBBase::halfint[5] = {27, '[', '2', 'm', '\0' };
-char FGJSBBase::normint[6] = {27, '[', '2', '2', 'm', '\0' };
-char FGJSBBase::reset[5] = {27, '[', '0', 'm', '\0' };
-char FGJSBBase::underon[5] = {27, '[', '4', 'm', '\0' };
-char FGJSBBase::underoff[6] = {27, '[', '2', '4', 'm', '\0' };
-char FGJSBBase::fgblue[6] = {27, '[', '3', '4', 'm', '\0' };
-char FGJSBBase::fgcyan[6] = {27, '[', '3', '6', 'm', '\0' };
-char FGJSBBase::fgred[6] = {27, '[', '3', '1', 'm', '\0' };
-char FGJSBBase::fggreen[6] = {27, '[', '3', '2', 'm', '\0' };
-char FGJSBBase::fgdef[6] = {27, '[', '3', '9', 'm', '\0' };
-
-const double FGJSBBase::radtodeg = 57.29578;
-const double FGJSBBase::degtorad = 1.745329E-2;
+#ifndef _MSC_VER
+ char FGJSBBase::highint[5] = {27, '[', '1', 'm', '\0' };
+ char FGJSBBase::halfint[5] = {27, '[', '2', 'm', '\0' };
+ char FGJSBBase::normint[6] = {27, '[', '2', '2', 'm', '\0' };
+ char FGJSBBase::reset[5] = {27, '[', '0', 'm', '\0' };
+ char FGJSBBase::underon[5] = {27, '[', '4', 'm', '\0' };
+ char FGJSBBase::underoff[6] = {27, '[', '2', '4', 'm', '\0' };
+ char FGJSBBase::fgblue[6] = {27, '[', '3', '4', 'm', '\0' };
+ char FGJSBBase::fgcyan[6] = {27, '[', '3', '6', 'm', '\0' };
+ char FGJSBBase::fgred[6] = {27, '[', '3', '1', 'm', '\0' };
+ char FGJSBBase::fggreen[6] = {27, '[', '3', '2', 'm', '\0' };
+ char FGJSBBase::fgdef[6] = {27, '[', '3', '9', 'm', '\0' };
+#else
+ char FGJSBBase::highint[5] = {'\0' };
+ char FGJSBBase::halfint[5] = {'\0' };
+ char FGJSBBase::normint[6] = {'\0' };
+ char FGJSBBase::reset[5] = {'\0' };
+ char FGJSBBase::underon[5] = {'\0' };
+ char FGJSBBase::underoff[6] = {'\0' };
+ char FGJSBBase::fgblue[6] = {'\0' };
+ char FGJSBBase::fgcyan[6] = {'\0' };
+ char FGJSBBase::fgred[6] = {'\0' };
+ char FGJSBBase::fggreen[6] = {'\0' };
+ char FGJSBBase::fgdef[6] = {'\0' };
+#endif
+
+const double FGJSBBase::radtodeg = 57.295779513082320876798154814105;
+const double FGJSBBase::degtorad = 0.017453292519943295769236907684886;
const double FGJSBBase::hptoftlbssec = 550.0;
+const double FGJSBBase::psftoinhg = 0.014138;
+const double FGJSBBase::psftopa = 47.88;
const double FGJSBBase::fpstokts = 0.592484;
const double FGJSBBase::ktstofps = 1.68781;
const double FGJSBBase::inchtoft = 0.08333333;
-const double FGJSBBase::Reng = 1716.0;
+const double FGJSBBase::in3tom3 = 1.638706E-5;
+const double FGJSBBase::m3toft3 = 1.0/(fttom*fttom*fttom);
+const double FGJSBBase::inhgtopa = 3386.38;
+const double FGJSBBase::fttom = 0.3048;
+double FGJSBBase::Reng = 1716.56; // Gas constant for Air (ft-lb/slug-R)
+double FGJSBBase::Rstar = 1545.348; // Universal gas constant
+double FGJSBBase::Mair = 28.9645; //
const double FGJSBBase::SHRatio = 1.40;
-const string FGJSBBase::needed_cfg_version = "1.56";
-const string FGJSBBase::JSBSim_version = "0.9.1";
-queue <FGJSBBase::Message*> FGJSBBase::Messages;
+// Note that definition of lbtoslug by the inverse of slugtolb and not
+// to a different constant you can also get from some tables will make
+// lbtoslug*slugtolb == 1 up to the magnitude of roundoff. So converting from
+// slug to lb and back will yield to the original value you started with up
+// to the magnitude of roundoff.
+// Taken from units gnu commandline tool
+const double FGJSBBase::slugtolb = 32.174049;
+const double FGJSBBase::lbtoslug = 1.0/slugtolb;
+const double FGJSBBase::kgtolb = 2.20462;
+const double FGJSBBase::kgtoslug = 0.06852168;
+
+const string FGJSBBase::needed_cfg_version = "2.0";
+const string FGJSBBase::JSBSim_version = "1.0 " __DATE__ " " __TIME__ ;
+
+std::queue <FGJSBBase::Message> FGJSBBase::Messages;
FGJSBBase::Message FGJSBBase::localMsg;
-unsigned int FGJSBBase::messageId = 0;
-unsigned int FGJSBBase::frame = 0;
+unsigned int FGJSBBase::messageId = 0;
+
+short FGJSBBase::debug_lvl = 1;
-short FGJSBBase::debug_lvl = 0;
+using std::cerr;
+using std::cout;
+using std::endl;
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::FGJSBBase()
+void FGJSBBase::PutMessage(const Message& msg)
{
+ Messages.push(msg);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::Message* FGJSBBase::PutMessage(Message* msg)
+void FGJSBBase::PutMessage(const string& text)
{
+ Message msg;
+ msg.text = text;
+ msg.messageId = messageId++;
+ msg.subsystem = "FDM";
+ msg.type = Message::eText;
Messages.push(msg);
- return msg;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::Message* FGJSBBase::PutMessage(string text)
+void FGJSBBase::PutMessage(const string& text, bool bVal)
{
- Message *msg = new Message();
- msg->text = text;
- msg->messageId = messageId++;
- msg->subsystem = "FDM";
- msg->type = Message::eText;
+ Message msg;
+ msg.text = text;
+ msg.messageId = messageId++;
+ msg.subsystem = "FDM";
+ msg.type = Message::eBool;
+ msg.bVal = bVal;
Messages.push(msg);
- return msg;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::Message* FGJSBBase::PutMessage(string text, bool bVal)
+void FGJSBBase::PutMessage(const string& text, int iVal)
{
- Message *msg = new Message();
- msg->text = text;
- msg->messageId = messageId++;
- msg->subsystem = "FDM";
- msg->type = Message::eBool;
- msg->bVal = bVal;
+ Message msg;
+ msg.text = text;
+ msg.messageId = messageId++;
+ msg.subsystem = "FDM";
+ msg.type = Message::eInteger;
+ msg.iVal = iVal;
Messages.push(msg);
- return msg;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::Message* FGJSBBase::PutMessage(string text, int iVal)
+void FGJSBBase::PutMessage(const string& text, double dVal)
{
- Message *msg = new Message();
- msg->text = text;
- msg->messageId = messageId++;
- msg->subsystem = "FDM";
- msg->type = Message::eInteger;
- msg->bVal = iVal;
+ Message msg;
+ msg.text = text;
+ msg.messageId = messageId++;
+ msg.subsystem = "FDM";
+ msg.type = Message::eDouble;
+ msg.dVal = dVal;
Messages.push(msg);
- return msg;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::Message* FGJSBBase::PutMessage(string text, double dVal)
+int FGJSBBase::SomeMessages(void)
{
- Message *msg = new Message();
- msg->text = text;
- msg->messageId = messageId++;
- msg->subsystem = "FDM";
- msg->type = Message::eDouble;
- msg->bVal = dVal;
- Messages.push(msg);
- return msg;
+ return !Messages.empty();
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::Message* FGJSBBase::ReadMessage(void)
+void FGJSBBase::ProcessMessage(void)
{
- if (!Messages.empty()) return Messages.front();
- else return NULL;
+ if (Messages.empty()) return;
+ localMsg = Messages.front();
+
+ while (Messages.size() > 0) {
+ switch (localMsg.type) {
+ case JSBSim::FGJSBBase::Message::eText:
+ cout << localMsg.messageId << ": " << localMsg.text << endl;
+ break;
+ case JSBSim::FGJSBBase::Message::eBool:
+ cout << localMsg.messageId << ": " << localMsg.text << " " << localMsg.bVal << endl;
+ break;
+ case JSBSim::FGJSBBase::Message::eInteger:
+ cout << localMsg.messageId << ": " << localMsg.text << " " << localMsg.iVal << endl;
+ break;
+ case JSBSim::FGJSBBase::Message::eDouble:
+ cout << localMsg.messageId << ": " << localMsg.text << " " << localMsg.dVal << endl;
+ break;
+ default:
+ cerr << "Unrecognized message type." << endl;
+ break;
+ }
+ Messages.pop();
+ if (Messages.size() > 0) localMsg = Messages.front();
+ else break;
+ }
+
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGJSBBase::Message* FGJSBBase::ProcessMessage(void)
+FGJSBBase::Message* FGJSBBase::ProcessNextMessage(void)
{
- if (!Messages.empty())
- localMsg = *(Messages.front());
- else
- return NULL;
+ if (Messages.empty()) return NULL;
+ localMsg = Messages.front();
+
Messages.pop();
return &localMsg;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+void FGJSBBase::disableHighLighting(void)
+{
+ highint[0]='\0';
+ halfint[0]='\0';
+ normint[0]='\0';
+ reset[0]='\0';
+ underon[0]='\0';
+ underoff[0]='\0';
+ fgblue[0]='\0';
+ fgcyan[0]='\0';
+ fgred[0]='\0';
+ fggreen[0]='\0';
+ fgdef[0]='\0';
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+string FGJSBBase::CreateIndexedPropertyName(const string& Property, int index)
+{
+ std::ostringstream buf;
+ buf << Property << '[' << index << ']';
+ return buf.str();
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+double FGJSBBase::GaussianRandomNumber(void)
+{
+ static double V1, V2, S;
+ static int phase = 0;
+ double X;
+
+ if (phase == 0) {
+ V1 = V2 = S = X = 0.0;
+
+ do {
+ double U1 = (double)rand() / RAND_MAX;
+ double U2 = (double)rand() / RAND_MAX;
+
+ V1 = 2 * U1 - 1;
+ V2 = 2 * U2 - 1;
+ S = V1 * V1 + V2 * V2;
+ } while(S >= 1 || S == 0);
+
+ X = V1 * sqrt(-2 * log(S) / S);
+ } else
+ X = V2 * sqrt(-2 * log(S) / S);
+
+ phase = 1 - phase;
+
+ return X;
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+double FGJSBBase::VcalibratedFromMach(double mach, double p, double psl, double rhosl)
+{
+ double pt,A;
+
+ if (mach < 0) mach=0;
+ if (mach < 1) //calculate total pressure assuming isentropic flow
+ pt=p*pow((1 + 0.2*mach*mach),3.5);
+ else {
+ // shock in front of pitot tube, we'll assume its normal and use
+ // the Rayleigh Pitot Tube Formula, i.e. the ratio of total
+ // pressure behind the shock to the static pressure in front of
+ // the normal shock assumption should not be a bad one -- most supersonic
+ // aircraft place the pitot probe out front so that it is the forward
+ // most point on the aircraft. The real shock would, of course, take
+ // on something like the shape of a rounded-off cone but, here again,
+ // the assumption should be good since the opening of the pitot probe
+ // is very small and, therefore, the effects of the shock curvature
+ // should be small as well. AFAIK, this approach is fairly well accepted
+ // within the aerospace community
+
+ // The denominator below is zero for Mach ~ 0.38, for which
+ // we'll never be here, so we're safe
+
+ pt = p*166.92158*pow(mach,7.0)/pow(7*mach*mach-1,2.5);
+ }
+
+ A = pow(((pt-p)/psl+1),0.28571);
+ return sqrt(7*psl/rhosl*(A-1));
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+double FGJSBBase::MachFromVcalibrated(double vcas, double p, double psl, double rhosl)
+{
+ double pt = p + psl*(pow(1+vcas*vcas*rhosl/(7.0*psl),3.5)-1);
+
+ if (pt/p < 1.89293)
+ return sqrt(5.0*(pow(pt/p, 0.2857143) -1)); // Mach < 1
+ else {
+ // Mach >= 1
+ double mach = sqrt(0.77666*pt/p); // Initial guess is based on a quadratic approximation of the Rayleigh formula
+ double delta = 1.;
+ double target = pt/(166.92158*p);
+ int iter = 0;
+
+ // Find the root with Newton-Raphson. Since the differential is never zero,
+ // the function is monotonic and has only one root with a multiplicity of one.
+ // Convergence is certain.
+ while (delta > 1E-5 && iter < 10) {
+ double m2 = mach*mach; // Mach^2
+ double m6 = m2*m2*m2; // Mach^6
+ delta = mach*m6/pow(7.0*m2-1.0,2.5) - target;
+ double diff = 7.0*m6*(2.0*m2-1)/pow(7.0*m2-1.0,3.5); // Never zero when Mach >= 1
+ mach -= delta/diff;
+ iter++;
+ }
+
+ return mach;
+ }
+}
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+} // namespace JSBSim
+
projects / flightgear.git / blobdiff