Ref T259, Ref T243 simulator environment provider

* access to elevation
* future: more data such as airport info

src/blackcore/airspacemonitor.h

@@ -25,6 +25,13 @@
 
 #include "blackcore/blackcoreexport.h"
 #include "blackcore/network.h"
+#include "blackmisc/simulation/aircraftmodel.h"
+#include "blackmisc/simulation/airspaceaircraftsnapshot.h"
+#include "blackmisc/simulation/ownaircraftprovider.h"
+#include "blackmisc/simulation/remoteaircraftprovider.h"
+#include "blackmisc/simulation/simulationenvironmentprovider.h"
+#include "blackmisc/simulation/simulatedaircraft.h"
+#include "blackmisc/simulation/simulatedaircraftlist.h"
 #include "blackmisc/aviation/aircraftpartslist.h"
 #include "blackmisc/aviation/aircraftsituationlist.h"
 #include "blackmisc/aviation/atcstation.h"
@@ -40,12 +47,6 @@
 #include "blackmisc/pq/frequency.h"
 #include "blackmisc/pq/length.h"
 #include "blackmisc/pq/angle.h"
-#include "blackmisc/simulation/aircraftmodel.h"
-#include "blackmisc/simulation/airspaceaircraftsnapshot.h"
-#include "blackmisc/simulation/ownaircraftprovider.h"
-#include "blackmisc/simulation/remoteaircraftprovider.h"
-#include "blackmisc/simulation/simulatedaircraft.h"
-#include "blackmisc/simulation/simulatedaircraftlist.h"
 
 namespace BlackMisc
 {
@@ -70,6 +71,7 @@ namespace BlackCore
         public QObject,
         public BlackMisc::Simulation::IRemoteAircraftProvider, // those data will be provided from the class CAirspaceMonitor
         public BlackMisc::Simulation::COwnAircraftAware,       // used to obtain in memory information about own aircraft
+        public BlackMisc::Simulation::CSimulationEnvironmentAware, // elevation info etc.
         public BlackMisc::CIdentifiable
     {
         Q_OBJECT

src/blackmisc/simulation/simulationenvironmentprovider.cpp

@@ -0,0 +1,73 @@
+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "simulationenvironmentprovider.h"
+
+using namespace BlackMisc::Geo;
+
+namespace BlackMisc
+{
+    namespace Simulation
+    {
+        bool ISimulationEnvironmentProvider::rememberGroundElevation(const ICoordinateGeodetic &elevationCoordinate, const PhysicalQuantities::CLength &epsilon)
+        {
+            {
+                QReadLocker l(&m_lockElvCoordinates);
+                if (m_elvCoordinates.containsObjectInRange(elevationCoordinate, epsilon)) { return false; }
+            }
+            {
+                QWriteLocker l(&m_lockElvCoordinates);
+                m_elvCoordinates.push_back(elevationCoordinate);
+            }
+            return true;
+        }
+
+        bool ISimulationEnvironmentProvider::rememberGroundElevation(const CElevationPlane &elevationPlane)
+        {
+            if (!elevationPlane.hasMSLGeodeticHeight()) { return false; }
+            return this->rememberGroundElevation(elevationPlane, elevationPlane.getRadius());
+        }
+
+        CCoordinateGeodeticList ISimulationEnvironmentProvider::getElevationCoordinates() const
+        {
+            QReadLocker l(&m_lockElvCoordinates);
+            return m_elvCoordinates;
+        }
+
+        int ISimulationEnvironmentProvider::cleanUpElevations(const ICoordinateGeodetic &referenceCoordinate, int maxNumber)
+        {
+            CCoordinateGeodeticList coordinates(this->getElevationCoordinates());
+            const int size = coordinates.size();
+            if (size <= maxNumber) { return 0; }
+            coordinates.sortByEuclideanDistanceSquared(referenceCoordinate);
+            coordinates.truncate(maxNumber);
+            const int delta = size - coordinates.size();
+            QWriteLocker l(&m_lockElvCoordinates);
+            m_elvCoordinates = coordinates;
+            return delta;
+        }
+
+        CElevationPlane ISimulationEnvironmentProvider::findClosestElevationWithinRange(const ICoordinateGeodetic &reference, const PhysicalQuantities::CLength &range)
+        {
+            return this->getElevationCoordinates().findClosestWithinRange(reference, range);
+        }
+
+        void ISimulationEnvironmentProvider::clearSimulationEnvironmentData()
+        {
+            QWriteLocker l(&m_lockElvCoordinates);
+            m_elvCoordinates.clear();
+        }
+
+        CElevationPlane CSimulationEnvironmentAware::findClosestElevationWithinRange(const ICoordinateGeodetic &reference, const PhysicalQuantities::CLength &range)
+        {
+            if (!m_simEnvironmentProvider) { return CElevationPlane::null(); }
+            return m_simEnvironmentProvider->findClosestElevationWithinRange(reference, range);
+        }
+    } // namespace
+} // namespace

src/blackmisc/simulation/simulationenvironmentprovider.h

@@ -0,0 +1,83 @@
+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKMISC_SIMULATION_SIMULATIONENVIRONMENTPROVIDER_H
+#define BLACKMISC_SIMULATION_SIMULATIONENVIRONMENTPROVIDER_H
+
+#include "blackmisc/geo/coordinategeodeticlist.h"
+#include "blackmisc/geo/elevationplane.h"
+
+namespace BlackMisc
+{
+    namespace Simulation
+    {
+        //! Direct in memory access to elevation data
+        //! \remark we are interested in elevations of airports
+        class BLACKMISC_EXPORT ISimulationEnvironmentProvider
+        {
+        public:
+            //! All remembered coordiantes
+            //! \remark might be a relatively large list
+            //! \threadsafe
+            Geo::CCoordinateGeodeticList getElevationCoordinates() const;
+
+            //! Only keep closest ones
+            //! \threadsafe
+            int cleanUpElevations(const Geo::ICoordinateGeodetic &referenceCoordinate, int maxNumber = MaxElevations);
+
+            //! Find closest elevation
+            //! \threadsafe
+            Geo::CElevationPlane findClosestElevationWithinRange(const Geo::ICoordinateGeodetic &reference, const PhysicalQuantities::CLength &range);
+
+            //! Clear data
+            //! \threadsafe
+            void clearSimulationEnvironmentData();
+
+        protected:
+            static constexpr int MaxElevations = 1000;  //!< How many elevations we keep
+
+            //! Remember a given elevation
+            //! \threadsafe
+            bool rememberGroundElevation(const Geo::ICoordinateGeodetic &elevationCoordinate, const PhysicalQuantities::CLength &epsilon = Geo::CElevationPlane::singlePointRadius()) ;
+
+            //! Remember a given elevation
+            //! \threadsafe
+            bool rememberGroundElevation(const Geo::CElevationPlane &elevationPlane) ;
+
+        private:
+            Geo::CCoordinateGeodeticList m_elvCoordinates;
+            mutable QReadWriteLock m_lockElvCoordinates; //!< lock m_coordinates
+        };
+
+        //! Class which can be directly used to access an \sa ISimulationEnvironmentProvider object
+        class BLACKMISC_EXPORT CSimulationEnvironmentAware
+        {
+        public:
+            //! Elevations, can be changed over time as it comes from simulator
+            void setSimulationEnvironmentProvider(ISimulationEnvironmentProvider *provider) { m_simEnvironmentProvider = provider; }
+
+            //! Find closest elevation
+            Geo::CElevationPlane findClosestElevationWithinRange(const Geo::ICoordinateGeodetic &reference, const PhysicalQuantities::CLength &range);
+
+        protected:
+            //! Default constructor
+            CSimulationEnvironmentAware() {}
+
+            //! Constructor
+            CSimulationEnvironmentAware(ISimulationEnvironmentProvider *simEnvProvider) : m_simEnvironmentProvider(simEnvProvider) { Q_ASSERT(simEnvProvider); }
+            ISimulationEnvironmentProvider *m_simEnvironmentProvider = nullptr; //!< access to object
+        };
+    } // namespace
+} // namespace
+
+Q_DECLARE_INTERFACE(BlackMisc::Simulation::ISimulationEnvironmentProvider, "BlackMisc::Simulation::ISimulationEnvironmentProvider")
+
+#endif // guard

src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp

@@ -496,6 +496,9 @@ namespace BlackSimPlugin
 
             // set it in the remote aircraft provider
             this->updateAircraftGroundElevation(simObject.getCallsign(), elevation);
+
+            // and in elevation provider
+            this->rememberGroundElevation(elevation);
         }
 
         void CSimulatorFsxCommon::updateOwnAircraftFromSimulator(const DataDefinitionClientAreaSb &sbDataArea)

src/plugins/simulator/xplane/simulatorxplane.cpp

@@ -1027,6 +1027,7 @@ namespace BlackSimPlugin
 
             // set it in the remote aircraft provider
             this->updateAircraftGroundElevation(cs, elevation);
+            this->rememberGroundElevation(elevation);
         }
 
         BlackCore::ISimulator *CSimulatorXPlaneFactory::create(const CSimulatorPluginInfo &info,