Record the historical flight-path (by default, since last takeoff). Optionally display the flight-path in the map; other visualisations (e.g., an 'in-world' view) could also be created. Nasal API to follow so Canvas-map or FMS can show the same data.
Altitude and attitude (Euler angles) are currently recorded but not used anywhere.
controls.cxx
replay.cxx
flightrecorder.cxx
+ FlightHistory.cxx
)
set(HEADERS
controls.hxx
replay.hxx
flightrecorder.hxx
+ FlightHistory.hxx
)
--- /dev/null
+// FlightHistory
+//
+// Written by James Turner, started December 2012.
+//
+// Copyright (C) 2012 James Turner - zakalawe (at) mac com
+//
+// 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 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 details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "FlightHistory.hxx"
+
+#include <algorithm>
+#include <boost/foreach.hpp>
+
+#include <simgear/sg_inlines.h>
+#include <simgear/debug/logstream.hxx>
+#include <simgear/props/props_io.hxx>
+#include <simgear/misc/strutils.hxx>
+#include <simgear/structure/exception.hxx>
+#include <simgear/math/SGMath.hxx>
+
+#include <Main/fg_props.hxx>
+#include <Main/globals.hxx>
+
+FGFlightHistory::FGFlightHistory() :
+ m_sampleInterval(5.0),
+ m_validSampleCount(SAMPLE_BUCKET_WIDTH)
+{
+}
+
+FGFlightHistory::~FGFlightHistory()
+{
+}
+
+void FGFlightHistory::init()
+{
+ m_sampleInterval = fgGetDouble("/sim/history/sample-interval-sec", 1.0);
+ if (m_sampleInterval <= 0.0) { // would be bad
+ SG_LOG(SG_FLIGHT, SG_INFO, "invalid flight-history sample interval:" << m_sampleInterval
+ << ", defaulting to " << m_sampleInterval);
+ m_sampleInterval = 1.0;
+ }
+
+ m_weightOnWheels = NULL;
+// reset the history when we detect a take-off
+ if (fgGetBool("/sim/history/clear-on-takeoff", true)) {
+ m_weightOnWheels = fgGetNode("/gear/gear[1]/wow", 0, true);
+ m_lastWoW = m_weightOnWheels->getBoolValue();
+ }
+
+ // force bucket re-allocation
+ m_validSampleCount = SAMPLE_BUCKET_WIDTH;
+}
+
+void FGFlightHistory::shutdown()
+{
+ clear();
+}
+
+void FGFlightHistory::reinit()
+{
+ shutdown();
+ init();
+}
+
+void FGFlightHistory::update(double dt)
+{
+ SG_UNUSED(dt); // we care about sim-time, not frame-time
+
+ if (m_weightOnWheels) {
+
+ if (m_lastWoW && !m_weightOnWheels->getBoolValue()) {
+ SG_LOG(SG_FLIGHT, SG_INFO, "history: detected main-gear takeoff, clearing history");
+ clear();
+ }
+ } // of rest-on-takeoff enabled
+
+ double elapsed = globals->get_sim_time_sec() - m_lastCaptureTime;
+ if (elapsed > m_sampleInterval) {
+ capture();
+ }
+}
+
+void FGFlightHistory::allocateNewBucket()
+{
+ SampleBucket* bucket = new SampleBucket;
+ m_buckets.push_back(bucket);
+ m_validSampleCount = 0;
+}
+
+void FGFlightHistory::capture()
+{
+ if (m_validSampleCount == SAMPLE_BUCKET_WIDTH) {
+ // bucket is full, allocate a new one
+ allocateNewBucket();
+ }
+
+ m_lastCaptureTime = globals->get_sim_time_sec();
+ Sample* sample = m_buckets.back()->samples + m_validSampleCount;
+
+ sample->simTimeMSec = static_cast<int>(m_lastCaptureTime * 1000.0);
+ sample->position = globals->get_aircraft_position();
+
+ double heading, pitch, roll;
+ globals->get_aircraft_orientation(heading, pitch, roll);
+ sample->heading = static_cast<float>(heading);
+ sample->pitch = static_cast<float>(pitch);
+ sample->roll = static_cast<float>(roll);
+
+ ++m_validSampleCount;
+}
+
+SGGeodVec FGFlightHistory::pathForHistory(double minEdgeLengthM) const
+{
+ SGGeodVec result;
+ if (m_buckets.empty()) {
+ return result;
+ }
+
+ result.push_back(m_buckets.front()->samples[0].position);
+ SGVec3d lastOutputCart = SGVec3d::fromGeod(result.back());
+ double minLengthSqr = minEdgeLengthM * minEdgeLengthM;
+
+ BOOST_FOREACH(SampleBucket* bucket, m_buckets) {
+ unsigned int count = (bucket == m_buckets.back() ? m_validSampleCount : SAMPLE_BUCKET_WIDTH);
+
+ // iterate over all the valid samples in the bucket
+ for (unsigned int index = 0; index < count; ++index) {
+ SGGeod g = bucket->samples[index].position;
+ SGVec3d cart(SGVec3d::fromGeod(g));
+ if (distSqr(cart, lastOutputCart) > minLengthSqr) {
+ lastOutputCart = cart;
+ result.push_back(g);
+ }
+ } // of samples iteration
+ } // of buckets iteration
+
+ return result;
+}
+
+void FGFlightHistory::clear()
+{
+ BOOST_FOREACH(SampleBucket* ptr, m_buckets) {
+ delete ptr;
+ }
+ m_buckets.clear();
+ m_validSampleCount = SAMPLE_BUCKET_WIDTH;
+}
+
--- /dev/null
+// FlightHistory
+//
+// Written by James Turner, started December 2012.
+//
+// Copyright (C) 2012 James Turner - zakalawe (at) mac com
+//
+// 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 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 details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef FG_AIRCRAFT_FLIGHT_HISTORY_HXX
+#define FG_AIRCRAFT_FLIGHT_HISTORY_HXX
+
+#include <simgear/structure/subsystem_mgr.hxx>
+#include <simgear/props/props.hxx>
+#include <simgear/math/SGMath.hxx>
+
+#include <vector>
+#include <memory> // for std::auto_ptr
+
+typedef std::vector<SGGeod> SGGeodVec;
+
+/**
+ * record the history of the aircraft's movements, making it available
+ * as a contiguous block. This can be used to show the historical flight-path
+ * over a long period of time (unlike the replay system), but only a small,
+ * fixed set of properties are recorded. (Positioned and orientation, but
+ * not velocity, acceleration, control inputs, or so on)
+ */
+class FGFlightHistory : public SGSubsystem
+{
+public:
+ FGFlightHistory();
+ virtual ~FGFlightHistory();
+
+ virtual void init();
+ virtual void shutdown();
+ virtual void reinit();
+ virtual void update(double dt);
+
+ /**
+ * retrieve the path, collapsing segments shorter than
+ * the specified minimum length
+ */
+ SGGeodVec pathForHistory(double minEdgeLengthM = 50.0) const;
+private:
+ /**
+ * @class A single data sample in the history system.
+ */
+ class Sample
+ {
+ public:
+ SGGeod position;
+ /// heading, pitch and roll can be recorded at lower precision
+ /// than a double - actually 16 bits might be sufficient
+ float heading, pitch, roll;
+ int simTimeMSec;
+ };
+
+ static const int SAMPLE_BUCKET_WIDTH = 1024;
+
+ /**
+ * Bucket is a fixed-size container of samples. This is a crude slab
+ * allocation of samples, in chunks defined by the width constant above.
+ * Keep in mind that even with a 1Hz sample frequency, we use less than
+ * 200kbytes per hour - avoiding continous malloc traffic, or expensive
+ * std::vector reallocations, is the key factor here.
+ */
+ class SampleBucket
+ {
+ public:
+ Sample samples[SAMPLE_BUCKET_WIDTH];
+ };
+
+ double m_lastCaptureTime;
+ double m_sampleInterval; ///< sample interval in seconds
+/// our store of samples (in buckets). The last bucket is partially full,
+/// with the number of valid samples indicated by m_validSampleCount
+ std::vector<SampleBucket*> m_buckets;
+
+/// number of valid samples in the final bucket
+ unsigned int m_validSampleCount;
+
+ SGPropertyNode_ptr m_weightOnWheels;
+ bool m_lastWoW;
+
+ void allocateNewBucket();
+
+ void clear();
+ void capture();
+};
+
+#endif
\ No newline at end of file
#include <Airports/runways.hxx>
#include <Main/fg_os.hxx> // fgGetKeyModifiers()
#include <Navaids/routePath.hxx>
+#include <Aircraft/FlightHistory.hxx>
const char* RULER_LEGEND_KEY = "ruler-legend";
_root->setIntValue("max-zoom", MAX_ZOOM);
_root->setBoolValue("centre-on-aircraft", true);
_root->setBoolValue("draw-data", false);
+ _root->setBoolValue("draw-flight-history", false);
_root->setBoolValue("magnetic-headings", true);
}
drawNavRadio(fgGetNode("/instrumentation/nav[0]", false));
drawNavRadio(fgGetNode("/instrumentation/nav[1]", false));
paintAircraftLocation(_aircraft);
+ drawFlightHistory();
paintRoute();
paintRuler();
} // of second waypoint iteration
}
+void MapWidget::drawFlightHistory()
+{
+ FGFlightHistory* history = (FGFlightHistory*) globals->get_subsystem("history");
+ if (!history || !_root->getBoolValue("draw-flight-history")) {
+ return;
+ }
+
+ // first pass, draw the actual lines
+ glLineWidth(2.0);
+
+ SGGeodVec gv(history->pathForHistory());
+ glColor4f(0.0, 0.0, 1.0, 0.7);
+
+ glBegin(GL_LINE_STRIP);
+ for (unsigned int i=0; i<gv.size(); ++i) {
+ SGVec2d p = project(gv[i]);
+ glVertex2d(p.x(), p.y());
+ }
+
+ glEnd();
+}
+
/**
* Round a SGGeod to an arbitrary precision.
* For example, passing precision of 0.5 will round to the nearest 0.5 of
void paintAircraftLocation(const SGGeod& aircraftPos);
void paintRoute();
void paintRuler();
+ void drawFlightHistory();
void drawGPSData();
void drawNavRadio(SGPropertyNode_ptr radio);
#include <Aircraft/controls.hxx>
#include <Aircraft/replay.hxx>
+#include <Aircraft/FlightHistory.hxx>
#include <Airports/runways.hxx>
#include <Airports/simple.hxx>
#include <Airports/dynamics.hxx>
// Initialize the replay subsystem
////////////////////////////////////////////////////////////////////
globals->add_subsystem("replay", new FGReplay);
-
+ globals->add_subsystem("history", new FGFlightHistory);
+
#ifdef ENABLE_AUDIO_SUPPORT
////////////////////////////////////////////////////////////////////
// Initialize the sound-effects subsystem.
projects / flightgear.git / commitdiff