Temperature Monitor Actuator

The DtTemperatureMonitorActuator is a new class that implements an actuator that updates the internal temperature of an entity in the state component. Additionally it will periodically print out the current temperature to the object console.

---

Header file:

/*******************************************************************************
** Copyright (c) 2021 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/

//
//class DtTemperatureMonitorActuator
//
//This is a component which simply keeps track of the entity's internal temperature. 
//Factors that affect temperature will be external temperature and if entity is moving.
//
#pragma once

#include "vrfobjcore/actuatorComponent.h"


//String which uniquely identifies this controller
const char DtTemperatureMonitorActuatorType[] = "temperature-monitor-actuator";

class DtTemperatureMonitorActuator : public DtActuatorComponent
{
public:
   //constructor
   DtTemperatureMonitorActuator(const DtString & name, DtLocalObject* owner,
      DtSimulationServices * simManager, DtComponentDescriptor* desc = NULL,
      DtReaderWriterRegistry * parentRegistry = 0);

   //destructor
   virtual ~DtTemperatureMonitorActuator();

   //copy constructor
   DtTemperatureMonitorActuator(const DtTemperatureMonitorActuator& orig);

   //assignment operator
   DtTemperatureMonitorActuator& operator=(const DtTemperatureMonitorActuator& orig);

   //Returns the string type for this component.
   virtual const char* type() const;

   //Overridden from the base class to call createPSR().
   virtual bool init();

   //Update control values
   //For this actuator, we apply some simple constraints to internal temperature and we print out the value every 10 seconds of 
   //simulation time.
   virtual void tick();

   virtual void calculateInternalTemperature();

   const double getTemperature() const;

   //This is called by the factory
   static DtSimComponent* creator(const DtString & name, DtLocalObject* owner,
      DtSimulationServices * simManager, DtComponentDescriptor* desc,
      DtReaderWriterRegistry * parentRegistry);


protected:
   double myNextPrintTime;
};

#pragma once

---

Implementation:

/*******************************************************************************
** Copyright (c) 2021 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/

//
//class DtTemperatureMonitorActuator
//

#include "temperatureMonitorActuator.h"
#include "internalTemperatureStateComponent.h"

#include "vrfobjcore/environmentalStateManager.h"
#include <vrfobjcore/physicalWorld.h>
#include "vrfobjcore/simObject.h"
#include <vrfutil/profiler.h>

using namespace makVrf;

//constructor
DtTemperatureMonitorActuator::DtTemperatureMonitorActuator(const DtString & name,
   DtLocalObject* owner, DtSimulationServices * simManager, DtComponentDescriptor* desc,
   DtReaderWriterRegistry * parentRegistry) :
   DtActuatorComponent(name, owner, simManager, desc,
      parentRegistry)
{
   myNextPrintTime = 0.0;
}

//destructor
//Since this class created the process state repository, it must also
//delete it when it is through.
DtTemperatureMonitorActuator::~DtTemperatureMonitorActuator()
{
}

const char* DtTemperatureMonitorActuator::type() const
{
   return DtTemperatureMonitorActuatorType;
}

//First call down to the base class init.
//Call createPSR() to create a process state repository.
bool DtTemperatureMonitorActuator::init()
{
   if (!DtActuatorComponent::init())
   {
      return false;
   }

   return true;
}

//calculate new control values
void DtTemperatureMonitorActuator::tick()
{
   DtPROFILE("DtManualRotaryWingEncumberedFlightActuator::tick");
   if (dT() > 0)
   {
      //access parameter in custom descriptor
      //check to make sure component is using custom descriptor, otherwise use hardcoded default
      int interval = 10;

      calculateInternalTemperature();

      //Print to the object console every 10 seconds to provide feedback that
      //the controller is working. 
      //Member variables of this component will not be saved in a checkpoint.
      //Use simulation services to get current time( Yes we can just call parent classes computeCurrentTime
      //But good to see use of simulationServices
      double currentTime = simulationServices()->simTime();

      if ( myNextPrintTime <= currentTime)
      {
         double temperature = getTemperature();
         objectConsoleInfo() << "addStateComponent Example - " <<
            "Current Internal Temperature is : " << temperature << std::endl;

         myNextPrintTime += interval;
      }
   }

}

void DtTemperatureMonitorActuator::calculateInternalTemperature()
{
   //Get current internal temperature from current frame
   double currentTemp = getTemperature();
   //Make any modifications as needed
   //Access weather to get external temperature
   DtEnvironmentalStateManager* env = simulationServices()->physicalWorld()->
      environmentalStateManager();

   double externalTemp = env->airTemperature(entity()->localPosition());
   //Set internal temperature based on external temperature
   if ( externalTemp < 0.0 )
   {
      //Brrrr its cold, body temp drops 
      currentTemp = 36.5;
   }
   else if (externalTemp > 40.0)
   {
      //Phew it's hot, body temp rises
      currentTemp = 38.0;
   }
   //Set in next frame
   entity()->getNextFrameStateComponent<DtInternalTemperatureStateComponent>()->setInternalCoreTemperature(currentTemp);
}

const double DtTemperatureMonitorActuator::getTemperature() const
{
   //Access the internal temperature component to get current internal temperature
   return entity()->getStateComponent<DtInternalTemperatureStateComponent>()->internalCoreTemperature();
}

DtSimComponent* DtTemperatureMonitorActuator::creator(const DtString& name,
   DtLocalObject* owner, DtSimulationServices* simManager, DtComponentDescriptor* desc,
   DtReaderWriterRegistry* parentRegistry)
{
   return
      new DtTemperatureMonitorActuator(name, owner, simManager, desc, parentRegistry);
}