FGFCSChannel.h

/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 Header:       FGGFCSChannel.h
 Author:       Jon S. Berndt
 Date started: 10/11/12
 
 ------------- Copyright (C) 2012  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 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 Lesser General Public License for more
 details.
 
 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 Lesser General Public License can also be found on
 the world wide web at http://www.gnu.org.
 
HISTORY
--------------------------------------------------------------------------------
10/11/12   JSB   Created
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
SENTRY
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#ifndef FGFCSCHANNEL_H
#define FGFCSCHANNEL_H
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#include <iostream>
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
namespace JSBSim {
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DECLARATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
typedef std::vector <FGFCSComponent*> FCSCompVec;
 
class FGFCSChannel {
public:
  FGFCSChannel(FGFCS* FCS, const std::string &name, int execRate,
               FGPropertyNode* node=0)
    : fcs(FCS), OnOffNode(node), Name(name)
  {
    ExecRate = execRate < 1 ? 1 : execRate;
    // Set ExecFrameCountSinceLastRun so that each components are initialized
    ExecFrameCountSinceLastRun = ExecRate;
  }
 
  ~FGFCSChannel() {
    for (unsigned int i=0; i<FCSComponents.size(); i++) delete FCSComponents[i];
    FCSComponents.clear();
  }
  std::string GetName() {return Name;}
 
  void Add(FGFCSComponent* comp) {
    FCSComponents.push_back(comp);
  }
  size_t GetNumComponents() {return FCSComponents.size();}
  FGFCSComponent* GetComponent(unsigned int i) {
    if (i >= GetNumComponents()) {
      std::cerr << "Tried to get nonexistent component" << std::endl;
      return 0;
    } else {
      return FCSComponents[i];
    }
  }
  void Reset() {
    for (unsigned int i=0; i<FCSComponents.size(); i++)
      FCSComponents[i]->ResetPastStates();
 
    // Set ExecFrameCountSinceLastRun so that each components are initialized
    // after a reset.
    ExecFrameCountSinceLastRun = ExecRate;
  }
  void Execute() {
    // If there is an on/off property supplied for this channel, check
    // the value. If it is true, permit execution to continue. If not, return
    // and do not execute the channel.
    if (OnOffNode && !OnOffNode->getBoolValue()) return;
 
    if (fcs->GetDt() != 0.0) {
      if (ExecFrameCountSinceLastRun >= ExecRate) {
        ExecFrameCountSinceLastRun = 0;
      }
 
      ++ExecFrameCountSinceLastRun;
    }
 
    // channel will be run at rate 1 if trimming, or when the next execrate
    // frame is reached
    if (fcs->GetTrimStatus() || ExecFrameCountSinceLastRun >= ExecRate) {
      for (unsigned int i=0; i<FCSComponents.size(); i++) 
        FCSComponents[i]->Run();
    }
  }
  int GetRate(void) const { return ExecRate; }
 
  private:
    FGFCS* fcs;
    FCSCompVec FCSComponents;
    FGConstPropertyNode_ptr OnOffNode;
    std::string Name;
 
    int ExecRate;        // rate at which this system executes, 0 or 1 every frame, 2 every second frame etc..
    int ExecFrameCountSinceLastRun;
};
 
}
 
#endif