DDM Listen Example

DDM Listen is exactly like Listen , but adds HLA DDM to the mix.

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//********************************************************************
// Copyright (c) 2005 MaK Technologies, Inc.
// All rights reserved.
//********************************************************************


#include <vl/exerciseConn.h>
#include <vl/exConnInit.h>
#include <matrix/geodCoord.h> 
#include <vl/entitySR.h>
#include <vl/reflEntList.h>
#include <vl/reflectedEnt.h>
#include <vl/geodeticRegion.h>
#include <vl/refEmitLst.h>

int keybrdTick()
{
   char *keyPtr = DtPollBlockingInputLine();
   if (keyPtr && (*keyPtr == 'q' || *keyPtr == 'Q'))
      return -1;
   else
      return 0;
}

int main(int argc, char* argv[])
{
   DtVrlApplicationInitializer appInit(argc, argv, "VR-Link DDM Listen");
   
   appInit.setExecName("VR-LinkDDM");
#if !DtHLA_1516
   appInit.setFedFileName("VR-LinkDDM.fed");
#else
#if DtHLA_1516_EVOLVED
   appInit.setFedFileName("VR-LinkDDM_evolved.xml");
#else
   appInit.setFedFileName("VR-LinkDDM.xml");
#endif
#endif

   appInit.parseCmdLine();

   DtExerciseConn exConn(appInit);
   // Switch needs be set in order to pull reflected objects off of the 
   // reflected lists when they go out of scope
   try
   {
      exConn.rtiAmb()->enableAttributeScopeAdvisorySwitch();
   }
   catch( ... )
   {
      DtWarn << "Caught an exception attempting to enable the Attribute Scope Advisory Switch.";
      DtWarn << " Please make sure Force Full Compliance is turned on." << std::endl;
      return 0;
   }
   
   // Set playbox (area of interest... used for normalization)
   exConn.setDdmPlayBoxLowerBound(DtGeodeticCoord(DtDeg2Rad(30.0), DtDeg2Rad(-130.0), 0));
   exConn.setDdmPlayBoxUpperBound(DtGeodeticCoord(DtDeg2Rad(40.0), DtDeg2Rad(-120.0), 0));
 
   DtReflectedEntityList* reflEntList = 0;
   DtReflectedEmitterSystemList* reflEmitList = 0;
   
   DtGeodeticRegionSP firstRegion;
   DtGeodeticRegionSP secondRegion;

   try
   {
      // Smart pointers are used to create/pass around regions, since they can
      // be created and passed around so much
      DtDDMRegionSet regions;
      firstRegion = DtGeodeticRegionSP(new DtGeodeticRegion(&exConn));
      secondRegion = DtGeodeticRegionSP(new DtGeodeticRegion(&exConn));

      DtDDMRegionSet firstRegionSet;
      firstRegionSet.insert(firstRegion);

      // Set region bounds (two identical regions for now)
      firstRegion->setRegionBounds(DtGeodeticCoord(DtDeg2Rad(35.7), DtDeg2Rad(-122.0), 0),
         DtGeodeticCoord(DtDeg2Rad(35.7075), DtDeg2Rad(-121.0), 0));
      secondRegion->setRegionBounds(DtGeodeticCoord(DtDeg2Rad(35.7), DtDeg2Rad(-122.0), 0),
         DtGeodeticCoord(DtDeg2Rad(36.0), DtDeg2Rad(-121.0), 0));
   
      // Create an array of regions
      regions.insert(firstRegion);
      regions.insert(secondRegion);

      // Reflected entity list subscribes to both lists
      reflEntList = new DtReflectedEntityList(&exConn, false, &regions);

      // Emitter system only interested in first list
      reflEmitList = new DtReflectedEmitterSystemList(&exConn, true, &firstRegionSet);
   }
   catch (DtException& except)
   {
      // If region creation fails, continue, but without regions
      DtWarn << "Cannot create region: " << except << std::endl;
      reflEntList = new DtReflectedEntityList(&exConn);
      reflEmitList = new DtReflectedEmitterSystemList(&exConn);
   } 

   // if at this point the smart pointers are null 
   // then something happened and we need to exit
   if( firstRegion == NULL || secondRegion == NULL )
   {
      DtWarn << "Exception occurred: regions were not created, exiting." << std::endl;
      return 0;
   }

   // Let's update the second region
   secondRegion->setRegionBounds(DtGeodeticCoord(DtDeg2Rad(35.725), DtDeg2Rad(-122.0),
      0), DtGeodeticCoord(DtDeg2Rad(36.0), DtDeg2Rad(-121.0), 0));

   DtClock* clock = exConn.clock();

   // Main loop
   int forever = 1;
   while (forever)
   {
      // Check if user hit 'q' to quit.
      if (keybrdTick() == -1)
         break;

      // Tell VR-Link the current value of simulation time.
      clock->setSimTime(clock->elapsedRealTime());

      // Process any incoming messages.
      exConn.drainInput();

      DtReflectedEntity* firstEntity = reflEntList->first();

      if (firstEntity)
      {
         DtGeodeticCoord entLoc;
         entLoc.setGeocentric(firstEntity->esr()->location());
         DtInfo << "Entity in scope.  Location: " << DtRad2Deg(entLoc.lat()) << ", "
            << DtRad2Deg(entLoc.lon()) << std::endl;
      }

      DtReflectedEmitterSystem* firstEmitter = reflEmitList->first();

      if (firstEmitter)
      {
         DtInfo << "Emitter in scope.  Emitter number: " 
                << static_cast<int>(firstEmitter->esr()->emitterNumber()) 
                << std::endl;
      }

      // Sleep till next iteration.
      DtSleep(1.0);
   }  

   delete reflEntList;
   delete reflEmitList;

   return 0;

}

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