5 #include "MapWidget.hxx"
8 #include <algorithm> // for std::sort
9 #include <plib/puAux.h>
11 #include <simgear/sg_inlines.h>
12 #include <simgear/misc/strutils.hxx>
13 #include <simgear/magvar/magvar.hxx>
14 #include <simgear/timing/sg_time.hxx> // for magVar julianDate
15 #include <simgear/structure/exception.hxx>
17 #include <Main/globals.hxx>
18 #include <Main/fg_props.hxx>
19 #include <Autopilot/route_mgr.hxx>
20 #include <Navaids/positioned.hxx>
21 #include <Navaids/navrecord.hxx>
22 #include <Navaids/navlist.hxx>
23 #include <Navaids/fix.hxx>
24 #include <Airports/airport.hxx>
25 #include <Airports/runways.hxx>
26 #include <Main/fg_os.hxx> // fgGetKeyModifiers()
27 #include <Navaids/routePath.hxx>
28 #include <Aircraft/FlightHistory.hxx>
30 const char* RULER_LEGEND_KEY = "ruler-legend";
32 /* equatorial and polar earth radius */
33 const float rec = 6378137; // earth radius, equator (?)
34 const float rpol = 6356752.314f; // earth radius, polar (?)
36 /************************************************************************
37 some trigonometric helper functions
38 (translated more or less directly from Alexei Novikovs perl original)
39 *************************************************************************/
41 //Returns Earth radius at a given latitude (Ellipsoide equation with two equal axis)
42 static float earth_radius_lat( float lat )
44 double a = cos(lat)/rec;
45 double b = sin(lat)/rpol;
46 return 1.0f / sqrt( a * a + b * b );
49 ///////////////////////////////////////////////////////////////////////////
51 static puBox makePuBox(int x, int y, int w, int h)
61 static bool puBoxIntersect(const puBox& a, const puBox& b)
63 int x0 = SG_MAX2(a.min[0], b.min[0]);
64 int y0 = SG_MAX2(a.min[1], b.min[1]);
65 int x1 = SG_MIN2(a.max[0], b.max[0]);
66 int y1 = SG_MIN2(a.max[1], b.max[1]);
68 return (x0 <= x1) && (y0 <= y1);
72 typedef std::vector<MapData*> MapDataVec;
77 static const int HALIGN_LEFT = 1;
78 static const int HALIGN_CENTER = 2;
79 static const int HALIGN_RIGHT = 3;
81 static const int VALIGN_TOP = 1 << 4;
82 static const int VALIGN_CENTER = 2 << 4;
83 static const int VALIGN_BOTTOM = 3 << 4;
85 MapData(int priority) :
91 _offsetDir(HALIGN_LEFT | VALIGN_CENTER),
97 void setLabel(const std::string& label)
99 if (label == _label) {
100 return; // common case, and saves invalidation
107 void setText(const std::string &text)
109 if (_rawText == text) {
110 return; // common case, and saves invalidation
117 void setDataVisible(bool vis) {
118 if (vis == _dataVisible) {
122 if (_rawText.empty()) {
130 static void setFont(puFont f)
133 _fontHeight = f.getStringHeight();
134 _fontDescender = f.getStringDescender();
137 static void setPalette(puColor* pal)
142 void setPriority(int pri)
148 { return _priority; }
150 void setAnchor(const SGVec2d& anchor)
155 void setOffset(int direction, int px)
157 if ((_offsetPx == px) && (_offsetDir == direction)) {
162 _offsetDir = direction;
166 bool isClipped(const puBox& vis) const
169 if ((_width < 1) || (_height < 1)) {
173 return !puBoxIntersect(vis, box());
176 bool overlaps(const MapDataVec& l) const
181 MapDataVec::const_iterator it;
182 for (it = l.begin(); it != l.end(); ++it) {
183 if (puBoxIntersect(b, (*it)->box())) {
186 } // of list iteration
195 _anchor.x() + _offset.x(),
196 _anchor.y() + _offset.y(),
204 int xx = _anchor.x() + _offset.x();
205 int yy = _anchor.y() + _offset.y();
208 puBox box(makePuBox(0,0,_width, _height));
210 box.draw(xx, yy, PUSTYLE_DROPSHADOW, _palette, FALSE, border);
213 int lineHeight = _fontHeight;
214 int xPos = xx + MARGIN;
215 int yPos = yy + _height - (lineHeight + MARGIN);
216 glColor3f(0.8, 0.8, 0.8);
218 for (unsigned int ln=0; ln<_lines.size(); ++ln) {
219 _font.drawString(_lines[ln].c_str(), xPos, yPos);
220 yPos -= lineHeight + LINE_LEADING;
223 glColor3f(0.8, 0.8, 0.8);
224 _font.drawString(_label.c_str(), xx, yy + _fontDescender);
238 bool isExpired() const
239 { return (_age > 100); }
241 static bool order(MapData* a, MapData* b)
243 return a->_priority > b->_priority;
246 void validate() const
266 void measureData() const
268 _lines = simgear::strutils::split(_rawText, "\n");
269 // measure text to find width and height
273 for (unsigned int ln=0; ln<_lines.size(); ++ln) {
274 _height += _fontHeight;
276 _height += LINE_LEADING;
279 int lw = _font.getStringWidth(_lines[ln].c_str());
280 _width = std::max(_width, lw);
281 } // of line measurement
283 if ((_width < 1) || (_height < 1)) {
288 _height += MARGIN * 2;
289 _width += MARGIN * 2;
292 void measureLabel() const
294 if (_label.empty()) {
295 _width = _height = -1;
299 _height = _fontHeight;
300 _width = _font.getStringWidth(_label.c_str());
303 void computeOffset() const
305 _dirtyOffset = false;
306 if ((_width <= 0) || (_height <= 0)) {
313 switch (_offsetDir & 0x0f) {
320 hOffset = -(_width>>1);
324 hOffset = -(_offsetPx + _width);
328 switch (_offsetDir & 0xf0) {
331 vOffset = -(_offsetPx + _height);
335 vOffset = -(_height>>1);
343 _offset = SGVec2d(hOffset, vOffset);
346 static const int LINE_LEADING = 3;
347 static const int MARGIN = 3;
349 mutable bool _dirtyText;
350 mutable bool _dirtyOffset;
352 std::string _rawText;
354 mutable std::vector<std::string> _lines;
356 mutable int _width, _height;
360 mutable SGVec2d _offset;
364 static puColor* _palette;
365 static int _fontHeight;
366 static int _fontDescender;
369 puFont MapData::_font;
370 puColor* MapData::_palette;
371 int MapData::_fontHeight = 0;
372 int MapData::_fontDescender = 0;
374 ///////////////////////////////////////////////////////////////////////////
376 const int MAX_ZOOM = 12;
377 const int SHOW_DETAIL_ZOOM = 8;
378 const int SHOW_DETAIL2_ZOOM = 5;
379 const int CURSOR_PAN_STEP = 32;
381 MapWidget::MapWidget(int x, int y, int maxX, int maxY) :
382 puObject(x,y,maxX, maxY)
384 _route = static_cast<FGRouteMgr*>(globals->get_subsystem("route-manager"));
385 _gps = fgGetNode("/instrumentation/gps");
390 _orthoAzimuthProject = false;
392 MapData::setFont(legendFont);
393 MapData::setPalette(colour);
395 _magVar = new SGMagVar();
398 MapWidget::~MapWidget()
404 void MapWidget::setProperty(SGPropertyNode_ptr prop)
407 int zoom = _root->getIntValue("zoom", -1);
409 _root->setIntValue("zoom", 6); // default zoom
412 // expose MAX_ZOOM to the UI
413 _root->setIntValue("max-zoom", MAX_ZOOM);
414 _root->setBoolValue("centre-on-aircraft", true);
415 _root->setBoolValue("draw-data", false);
416 _root->setBoolValue("draw-flight-history", false);
417 _root->setBoolValue("magnetic-headings", true);
420 void MapWidget::setSize(int w, int h)
422 puObject::setSize(w, h);
429 void MapWidget::doHit( int button, int updown, int x, int y )
431 puObject::doHit(button, updown, x, y);
432 if (updown == PU_DRAG) {
437 if (button == 3) { // mouse-wheel up
439 } else if (button == 4) { // mouse-wheel down
443 if (button != active_mouse_button) {
447 _hitLocation = SGVec2d(x - abox.min[0], y - abox.min[1]);
449 if (updown == PU_UP) {
450 puDeactivateWidget();
451 } else if (updown == PU_DOWN) {
452 puSetActiveWidget(this, x, y);
454 if (fgGetKeyModifiers() & KEYMOD_CTRL) {
455 _clickGeod = unproject(_hitLocation - SGVec2d(_width>>1, _height>>1));
460 void MapWidget::handlePan(int x, int y)
462 SGVec2d delta = SGVec2d(x, y) - _hitLocation;
464 _hitLocation = SGVec2d(x,y);
467 int MapWidget::checkKey (int key, int updown )
469 if ((updown == PU_UP) || !isVisible () || !isActive () || (window != puGetWindow())) {
477 pan(SGVec2d(0, -CURSOR_PAN_STEP));
481 pan(SGVec2d(0, CURSOR_PAN_STEP));
485 pan(SGVec2d(CURSOR_PAN_STEP, 0));
489 pan(SGVec2d(-CURSOR_PAN_STEP, 0));
508 void MapWidget::pan(const SGVec2d& delta)
511 _projectionCenter = unproject(-delta);
514 int MapWidget::zoom() const
516 int z = _root->getIntValue("zoom");
517 SG_CLAMP_RANGE(z, 0, MAX_ZOOM);
521 void MapWidget::zoomIn()
523 if (zoom() >= MAX_ZOOM) {
527 _root->setIntValue("zoom", zoom() + 1);
530 void MapWidget::zoomOut()
536 _root->setIntValue("zoom", zoom() - 1);
539 void MapWidget::draw(int dx, int dy)
541 _aircraft = globals->get_aircraft_position();
543 bool mag = _root->getBoolValue("magnetic-headings");
544 if (mag != _magneticHeadings) {
545 clearData(); // flush cached data text, since it often includes heading
546 _magneticHeadings = mag;
550 _root->setBoolValue("centre-on-aircraft", false);
553 else if (_root->getBoolValue("centre-on-aircraft")) {
554 _projectionCenter = _aircraft;
557 double julianDate = globals->get_time_params()->getJD();
558 _magVar->update(_projectionCenter, julianDate);
560 bool aircraftUp = _root->getBoolValue("aircraft-heading-up");
562 _upHeading = fgGetDouble("/orientation/heading-deg");
567 _cachedZoom = MAX_ZOOM - zoom();
568 SGGeod topLeft = unproject(SGVec2d(_width/2, _height/2));
569 // compute draw range, including a fudge factor for ILSs and other 'long'
571 _drawRangeNm = SGGeodesy::distanceNm(_projectionCenter, topLeft) + 10.0;
573 // drawing operations
574 GLint sx = (int) abox.min[0],
575 sy = (int) abox.min[1];
576 glScissor(dx + sx, dy + sy, _width, _height);
577 glEnable(GL_SCISSOR_TEST);
579 glMatrixMode(GL_MODELVIEW);
581 // cetere drawing about the widget center (which is also the
582 // projection centre)
583 glTranslated(dx + sx + (_width/2), dy + sy + (_height/2), 0.0);
588 int textHeight = legendFont.getStringHeight() + 5;
591 SGVec2d loc = project(_aircraft);
592 glColor3f(1.0, 1.0, 1.0);
593 drawLine(loc, SGVec2d(loc.x(), (_height / 2) - textHeight));
596 if (_magneticHeadings) {
597 displayHdg = (int) fgGetDouble("/orientation/heading-magnetic-deg");
599 displayHdg = (int) _upHeading;
602 double y = (_height / 2) - textHeight;
604 ::snprintf(buf, 16, "%d", displayHdg);
605 int sw = legendFont.getStringWidth(buf);
606 legendFont.drawString(buf, loc.x() - sw/2, y);
614 drawNavRadio(fgGetNode("/instrumentation/nav[0]", false));
615 drawNavRadio(fgGetNode("/instrumentation/nav[1]", false));
616 paintAircraftLocation(_aircraft);
624 glDisable(GL_SCISSOR_TEST);
627 void MapWidget::paintRuler()
629 if (_clickGeod == SGGeod()) {
633 SGVec2d acftPos = project(_aircraft);
634 SGVec2d clickPos = project(_clickGeod);
636 glColor4f(0.0, 1.0, 1.0, 0.6);
637 drawLine(acftPos, clickPos);
639 circleAtAlt(clickPos, 8, 10, 5);
641 double dist, az, az2;
642 SGGeodesy::inverse(_aircraft, _clickGeod, az, az2, dist);
644 ::snprintf(buffer, 1024, "%03d/%.1fnm",
645 displayHeading(az), dist * SG_METER_TO_NM);
647 MapData* d = getOrCreateDataForKey((void*) RULER_LEGEND_KEY);
649 d->setAnchor(clickPos);
650 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
651 d->setPriority(20000);
656 void MapWidget::paintAircraftLocation(const SGGeod& aircraftPos)
658 SGVec2d loc = project(aircraftPos);
660 double hdg = fgGetDouble("/orientation/heading-deg");
663 glColor4f(1.0, 1.0, 0.0, 1.0);
665 glTranslated(loc.x(), loc.y(), 0.0);
666 glRotatef(hdg - _upHeading, 0.0, 0.0, -1.0);
668 const SGVec2d wingspan(12, 0);
669 const SGVec2d nose(0, 8);
670 const SGVec2d tail(0, -14);
671 const SGVec2d tailspan(4,0);
673 drawLine(-wingspan, wingspan);
674 drawLine(nose, tail);
675 drawLine(tail - tailspan, tail + tailspan);
681 void MapWidget::paintRoute()
683 if (_route->numWaypts() < 2) {
687 RoutePath path(_route->flightPlan());
689 // first pass, draw the actual lines
692 for (int w=0; w<_route->numWaypts(); ++w) {
693 SGGeodVec gv(path.pathForIndex(w));
698 if (w < _route->currentIndex()) {
699 glColor4f(0.5, 0.5, 0.5, 0.7);
701 glColor4f(1.0, 0.0, 1.0, 1.0);
704 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
705 if (wpt->flag(flightgear::WPT_MISS)) {
706 glEnable(GL_LINE_STIPPLE);
707 glLineStipple(1, 0x00FF);
710 glBegin(GL_LINE_STRIP);
711 for (unsigned int i=0; i<gv.size(); ++i) {
712 SGVec2d p = project(gv[i]);
713 glVertex2d(p.x(), p.y());
717 glDisable(GL_LINE_STIPPLE);
721 // second pass, draw waypoint symbols and data
722 for (int w=0; w < _route->numWaypts(); ++w) {
723 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
724 SGGeod g = path.positionForIndex(w);
726 continue; // Vectors or similar
729 SGVec2d p = project(g);
730 glColor4f(1.0, 0.0, 1.0, 1.0);
731 circleAtAlt(p, 8, 12, 5);
733 std::ostringstream legend;
734 legend << wpt->ident();
735 if (wpt->altitudeRestriction() != flightgear::RESTRICT_NONE) {
736 legend << '\n' << SGMiscd::roundToInt(wpt->altitudeFt()) << '\'';
739 if (wpt->speedRestriction() == flightgear::SPEED_RESTRICT_MACH) {
740 legend << '\n' << wpt->speedMach() << "M";
741 } else if (wpt->speedRestriction() != flightgear::RESTRICT_NONE) {
742 legend << '\n' << SGMiscd::roundToInt(wpt->speedKts()) << "Kts";
745 MapData* d = getOrCreateDataForKey(reinterpret_cast<void*>(w * 2));
746 d->setText(legend.str());
747 d->setLabel(wpt->ident());
749 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
750 d->setPriority(w < _route->currentIndex() ? 9000 : 12000);
752 } // of second waypoint iteration
755 void MapWidget::drawFlightHistory()
757 FGFlightHistory* history = (FGFlightHistory*) globals->get_subsystem("history");
758 if (!history || !_root->getBoolValue("draw-flight-history")) {
762 // first pass, draw the actual lines
765 SGGeodVec gv(history->pathForHistory());
766 glColor4f(0.0, 0.0, 1.0, 0.7);
768 glBegin(GL_LINE_STRIP);
769 for (unsigned int i=0; i<gv.size(); ++i) {
770 SGVec2d p = project(gv[i]);
771 glVertex2d(p.x(), p.y());
778 * Round a SGGeod to an arbitrary precision.
779 * For example, passing precision of 0.5 will round to the nearest 0.5 of
780 * a degree in both lat and lon - passing in 3.0 rounds to the nearest 3 degree
781 * multiple, and so on.
783 static SGGeod roundGeod(double precision, const SGGeod& g)
785 double lon = SGMiscd::round(g.getLongitudeDeg() / precision);
786 double lat = SGMiscd::round(g.getLatitudeDeg() / precision);
788 return SGGeod::fromDeg(lon * precision, lat * precision);
791 bool MapWidget::drawLineClipped(const SGVec2d& a, const SGVec2d& b)
793 double minX = SGMiscd::min(a.x(), b.x()),
794 minY = SGMiscd::min(a.y(), b.y()),
795 maxX = SGMiscd::max(a.x(), b.x()),
796 maxY = SGMiscd::max(a.y(), b.y());
798 int hh = _height >> 1, hw = _width >> 1;
800 if ((maxX < -hw) || (minX > hw) || (minY > hh) || (maxY < -hh)) {
804 glVertex2dv(a.data());
805 glVertex2dv(b.data());
809 SGVec2d MapWidget::gridPoint(int ix, int iy)
811 int key = (ix + 0x7fff) | ((iy + 0x7fff) << 16);
812 GridPointCache::iterator it = _gridCache.find(key);
813 if (it != _gridCache.end()) {
817 SGGeod gp = SGGeod::fromDeg(
818 _gridCenter.getLongitudeDeg() + ix * _gridSpacing,
819 _gridCenter.getLatitudeDeg() + iy * _gridSpacing);
821 SGVec2d proj = project(gp);
822 _gridCache[key] = proj;
826 void MapWidget::drawLatLonGrid()
829 _gridCenter = roundGeod(_gridSpacing, _projectionCenter);
835 glColor4f(0.8, 0.8, 0.8, 0.4);
843 for (int x = -ix; x < ix; ++x) {
844 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x+1, -iy));
845 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x+1, iy));
846 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x, -iy + 1));
847 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x, iy - 1));
851 for (int y = -iy; y < iy; ++y) {
852 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix, y+1));
853 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix + 1, y));
854 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix, y+1));
855 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix - 1, y));
866 void MapWidget::drawGPSData()
868 std::string gpsMode = _gps->getStringValue("mode");
870 SGGeod wp0Geod = SGGeod::fromDeg(
871 _gps->getDoubleValue("wp/wp[0]/longitude-deg"),
872 _gps->getDoubleValue("wp/wp[0]/latitude-deg"));
874 SGGeod wp1Geod = SGGeod::fromDeg(
875 _gps->getDoubleValue("wp/wp[1]/longitude-deg"),
876 _gps->getDoubleValue("wp/wp[1]/latitude-deg"));
879 double gpsTrackDeg = _gps->getDoubleValue("indicated-track-true-deg");
880 double gpsSpeed = _gps->getDoubleValue("indicated-ground-speed-kt");
883 if (gpsSpeed > 3.0) { // only draw track line if valid
885 SGGeodesy::direct(_aircraft, gpsTrackDeg, _drawRangeNm * SG_NM_TO_METER, trackRadial, az2);
887 glColor4f(1.0, 1.0, 0.0, 1.0);
888 glEnable(GL_LINE_STIPPLE);
889 glLineStipple(1, 0x00FF);
890 drawLine(project(_aircraft), project(trackRadial));
891 glDisable(GL_LINE_STIPPLE);
894 if (gpsMode == "dto") {
895 SGVec2d wp0Pos = project(wp0Geod);
896 SGVec2d wp1Pos = project(wp1Geod);
898 glColor4f(1.0, 0.0, 1.0, 1.0);
899 drawLine(wp0Pos, wp1Pos);
903 if (_gps->getBoolValue("scratch/valid")) {
909 class MapAirportFilter : public FGAirport::AirportFilter
912 MapAirportFilter(SGPropertyNode_ptr nd)
914 _heliports = nd->getBoolValue("show-heliports", false);
915 _hardRunwaysOnly = nd->getBoolValue("hard-surfaced-airports", true);
916 _minLengthFt = fgGetDouble("/sim/navdb/min-runway-length-ft", 2000);
919 virtual FGPositioned::Type maxType() const {
920 return _heliports ? FGPositioned::HELIPORT : FGPositioned::AIRPORT;
923 virtual bool passAirport(FGAirport* aApt) const {
924 if (_hardRunwaysOnly) {
925 return aApt->hasHardRunwayOfLengthFt(_minLengthFt);
933 bool _hardRunwaysOnly;
937 void MapWidget::drawAirports()
939 MapAirportFilter af(_root);
940 bool partial = false;
941 FGPositionedList apts = FGPositioned::findWithinRangePartial(_projectionCenter, _drawRangeNm, &af, partial);
942 for (unsigned int i=0; i<apts.size(); ++i) {
943 drawAirport((FGAirport*) apts[i].get());
947 class NavaidFilter : public FGPositioned::Filter
950 NavaidFilter(bool fixesEnabled, bool navaidsEnabled) :
951 _fixes(fixesEnabled),
952 _navaids(navaidsEnabled)
955 virtual bool pass(FGPositioned* aPos) const {
956 if (_fixes && (aPos->type() == FGPositioned::FIX)) {
957 // ignore fixes which end in digits - expirmental
958 if (aPos->ident().length() > 4 && isdigit(aPos->ident()[3]) && isdigit(aPos->ident()[4])) {
966 virtual FGPositioned::Type minType() const {
967 return _fixes ? FGPositioned::FIX : FGPositioned::NDB;
970 virtual FGPositioned::Type maxType() const {
971 return _navaids ? FGPositioned::VOR : FGPositioned::FIX;
975 bool _fixes, _navaids;
978 void MapWidget::drawNavaids()
980 bool fixes = _root->getBoolValue("draw-fixes");
981 NavaidFilter f(fixes, _root->getBoolValue("draw-navaids"));
983 if (f.minType() <= f.maxType()) {
984 FGPositionedList navs = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &f);
987 for (unsigned int i=0; i<navs.size(); ++i) {
988 FGPositioned::Type ty = navs[i]->type();
989 if (ty == FGPositioned::NDB) {
990 drawNDB(false, (FGNavRecord*) navs[i].get());
991 } else if (ty == FGPositioned::VOR) {
992 drawVOR(false, (FGNavRecord*) navs[i].get());
993 } else if (ty == FGPositioned::FIX) {
994 drawFix((FGFix*) navs[i].get());
996 } // of navaid iteration
997 } // of navaids || fixes are drawn test
1000 void MapWidget::drawPOIs()
1002 FGPositioned::TypeFilter f(FGPositioned::COUNTRY);
1003 f.addType(FGPositioned::CITY);
1004 f.addType(FGPositioned::TOWN);
1005 FGPositionedList poi = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &f);
1008 for (unsigned int i=0; i<poi.size(); ++i) {
1009 FGPositioned::Type ty = poi[i]->type();
1010 if (ty == FGPositioned::COUNTRY) {
1011 drawCountries((FGNavRecord*) poi[i].get());
1012 } else if (ty == FGPositioned::CITY) {
1013 drawCities((FGNavRecord*) poi[i].get());
1014 } else if (ty == FGPositioned::TOWN) {
1015 drawTowns((FGNavRecord*) poi[i].get());
1017 } // of navaid iteration
1020 void MapWidget::drawNDB(bool tuned, FGNavRecord* ndb)
1022 SGVec2d pos = project(ndb->geod());
1025 glColor3f(0.0, 1.0, 1.0);
1027 glColor3f(0.0, 0.0, 0.0);
1030 glEnable(GL_LINE_STIPPLE);
1031 glLineStipple(1, 0x00FF);
1032 circleAt(pos, 20, 6);
1033 circleAt(pos, 20, 10);
1034 glDisable(GL_LINE_STIPPLE);
1036 if (validDataForKey(ndb)) {
1037 setAnchorForKey(ndb, pos);
1042 ::snprintf(buffer, 1024, "%s\n%s %3.0fKhz",
1043 ndb->name().c_str(), ndb->ident().c_str(),ndb->get_freq()/100.0);
1045 MapData* d = createDataForKey(ndb);
1047 d->setLabel(ndb->ident());
1049 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1054 void MapWidget::drawVOR(bool tuned, FGNavRecord* vor)
1056 SGVec2d pos = project(vor->geod());
1058 glColor3f(0.0, 1.0, 1.0);
1060 glColor3f(0.0, 0.0, 1.0);
1063 circleAt(pos, 6, 8);
1065 if (validDataForKey(vor)) {
1066 setAnchorForKey(vor, pos);
1071 ::snprintf(buffer, 1024, "%s\n%s %6.3fMhz",
1072 vor->name().c_str(), vor->ident().c_str(),
1073 vor->get_freq() / 100.0);
1075 MapData* d = createDataForKey(vor);
1077 d->setLabel(vor->ident());
1078 d->setPriority(tuned ? 10000 : 100);
1079 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1083 void MapWidget::drawFix(FGFix* fix)
1085 SGVec2d pos = project(fix->geod());
1086 glColor3f(0.0, 0.0, 0.0);
1087 circleAt(pos, 3, 6);
1089 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1090 return; // hide fix labels beyond a certain zoom level
1093 if (validDataForKey(fix)) {
1094 setAnchorForKey(fix, pos);
1098 MapData* d = createDataForKey(fix);
1099 d->setLabel(fix->ident());
1101 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1105 void MapWidget::drawNavRadio(SGPropertyNode_ptr radio)
1107 if (!radio || radio->getBoolValue("slaved-to-gps", false)
1108 || !radio->getBoolValue("in-range", false)) {
1112 if (radio->getBoolValue("nav-loc", false)) {
1113 drawTunedLocalizer(radio);
1116 // identify the tuned station - unfortunately we don't get lat/lon directly,
1117 // need to do the frequency search again
1118 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1120 FGNavRecord* nav = FGNavList::findByFreq(mhz, _aircraft,
1121 FGNavList::navFilter());
1122 if (!nav || (nav->ident() != radio->getStringValue("nav-id"))) {
1123 // mismatch between navradio selection logic and ours!
1130 SGVec2d pos = project(nav->geod());
1133 double trueRadial = radio->getDoubleValue("radials/target-radial-deg");
1134 SGGeodesy::direct(nav->geod(), trueRadial, nav->get_range() * SG_NM_TO_METER, range, az2);
1135 SGVec2d prange = project(range);
1137 SGVec2d norm = normalize(prange - pos);
1138 SGVec2d perp(norm.y(), -norm.x());
1140 circleAt(pos, 64, length(prange - pos));
1141 drawLine(pos, prange);
1143 // draw to/from arrows
1144 SGVec2d midPoint = (pos + prange) * 0.5;
1145 if (radio->getBoolValue("from-flag")) {
1151 SGVec2d arrowB = midPoint - (norm * sz) + (perp * sz);
1152 SGVec2d arrowC = midPoint - (norm * sz) - (perp * sz);
1153 drawLine(midPoint, arrowB);
1154 drawLine(arrowB, arrowC);
1155 drawLine(arrowC, midPoint);
1157 drawLine(pos, (2 * pos) - prange); // reciprocal radial
1160 void MapWidget::drawTunedLocalizer(SGPropertyNode_ptr radio)
1162 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1163 FGNavRecord* loc = FGNavList::findByFreq(mhz, _aircraft, FGNavList::locFilter());
1164 if (!loc || (loc->ident() != radio->getStringValue("nav-id"))) {
1165 // mismatch between navradio selection logic and ours!
1169 if (loc->runway()) {
1170 drawILS(true, loc->runway());
1174 void MapWidget::drawCountries(FGNavRecord* rec)
1176 if (_cachedZoom < 9) {
1177 return; // hide labels beyond a certain zoom level
1180 SGVec2d pos = project(rec->geod());
1181 glColor3f(1.0, 1.0, 0.0);
1183 circleAt(pos, 4, 10);
1185 if (validDataForKey(rec)) {
1186 setAnchorForKey(rec, pos);
1191 ::snprintf(buffer, 1024, "%s",
1192 rec->name().c_str());
1194 MapData* d = createDataForKey(rec);
1195 d->setPriority(200);
1196 d->setLabel(rec->ident());
1198 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1203 void MapWidget::drawCities(FGNavRecord* rec)
1205 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1206 return; // hide labels beyond a certain zoom level
1209 SGVec2d pos = project(rec->geod());
1210 glColor3f(0.0, 1.0, 0.0);
1212 circleAt(pos, 4, 8);
1214 if (validDataForKey(rec)) {
1215 setAnchorForKey(rec, pos);
1220 ::snprintf(buffer, 1024, "%s",
1221 rec->name().c_str());
1223 MapData* d = createDataForKey(rec);
1225 d->setLabel(rec->ident());
1227 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1232 void MapWidget::drawTowns(FGNavRecord* rec)
1234 if (_cachedZoom > SHOW_DETAIL2_ZOOM) {
1235 return; // hide labels beyond a certain zoom level
1238 SGVec2d pos = project(rec->geod());
1239 glColor3f(0.2, 1.0, 0.0);
1241 circleAt(pos, 4, 5);
1243 if (validDataForKey(rec)) {
1244 setAnchorForKey(rec, pos);
1249 ::snprintf(buffer, 1024, "%s",
1250 rec->name().c_str());
1252 MapData* d = createDataForKey(rec);
1254 d->setLabel(rec->ident());
1256 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1262 void MapWidget::drawObstacle(FGPositioned* obs)
1264 SGVec2d pos = project(obs->geod());
1265 glColor3f(0.0, 0.0, 0.0);
1267 drawLine(pos, pos + SGVec2d());
1271 void MapWidget::drawAirport(FGAirport* apt)
1273 // draw tower location
1274 SGVec2d towerPos = project(apt->getTowerLocation());
1276 if (_cachedZoom <= SHOW_DETAIL_ZOOM) {
1277 glColor3f(1.0, 1.0, 1.0);
1280 drawLine(towerPos + SGVec2d(3, 0), towerPos + SGVec2d(3, 10));
1281 drawLine(towerPos + SGVec2d(-3, 0), towerPos + SGVec2d(-3, 10));
1282 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(-3, 10));
1283 drawLine(towerPos + SGVec2d(6, 20), towerPos + SGVec2d(3, 10));
1284 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(6, 20));
1287 if (validDataForKey(apt)) {
1288 setAnchorForKey(apt, towerPos);
1291 ::snprintf(buffer, 1024, "%s\n%s",
1292 apt->ident().c_str(), apt->name().c_str());
1294 MapData* d = createDataForKey(apt);
1296 d->setLabel(apt->ident());
1297 d->setPriority(100 + scoreAirportRunways(apt));
1298 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 6);
1299 d->setAnchor(towerPos);
1302 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1306 FGRunwayList runways(apt->getRunwaysWithoutReciprocals());
1308 for (unsigned int r=0; r<runways.size(); ++r) {
1309 drawRunwayPre(runways[r]);
1312 for (unsigned int r=0; r<runways.size(); ++r) {
1313 FGRunway* rwy = runways[r];
1317 drawILS(false, rwy);
1320 if (rwy->reciprocalRunway()) {
1321 FGRunway* recip = rwy->reciprocalRunway();
1323 drawILS(false, recip);
1328 for (unsigned int r=0; r<apt->numHelipads(); ++r) {
1329 FGHelipad* hp = apt->getHelipadByIndex(r);
1331 } // of runway iteration
1335 int MapWidget::scoreAirportRunways(FGAirport* apt)
1337 bool needHardSurface = _root->getBoolValue("hard-surfaced-airports", true);
1338 double minLength = _root->getDoubleValue("min-runway-length-ft", 2000.0);
1340 FGRunwayList runways(apt->getRunwaysWithoutReciprocals());
1343 for (unsigned int r=0; r<runways.size(); ++r) {
1344 FGRunway* rwy = runways[r];
1345 if (needHardSurface && !rwy->isHardSurface()) {
1349 if (rwy->lengthFt() < minLength) {
1353 int scoreLength = SGMiscd::roundToInt(rwy->lengthFt() / 200.0);
1354 score += scoreLength;
1355 } // of runways iteration
1360 void MapWidget::drawRunwayPre(FGRunway* rwy)
1362 SGVec2d p1 = project(rwy->begin());
1363 SGVec2d p2 = project(rwy->end());
1366 glColor3f(1.0, 0.0, 1.0);
1370 void MapWidget::drawRunway(FGRunway* rwy)
1373 // optionally show active, stopway, etc
1374 // in legend, show published heading and length
1375 // and threshold elevation
1377 SGVec2d p1 = project(rwy->begin());
1378 SGVec2d p2 = project(rwy->end());
1380 glColor3f(1.0, 1.0, 1.0);
1381 SGVec2d inset = normalize(p2 - p1) * 2;
1383 drawLine(p1 + inset, p2 - inset);
1385 if (validDataForKey(rwy)) {
1386 setAnchorForKey(rwy, (p1 + p2) * 0.5);
1391 ::snprintf(buffer, 1024, "%s/%s\n%03d/%03d\n%.0f'",
1392 rwy->ident().c_str(),
1393 rwy->reciprocalRunway()->ident().c_str(),
1394 displayHeading(rwy->headingDeg()),
1395 displayHeading(rwy->reciprocalRunway()->headingDeg()),
1398 MapData* d = createDataForKey(rwy);
1400 d->setLabel(rwy->ident() + "/" + rwy->reciprocalRunway()->ident());
1402 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1403 d->setAnchor((p1 + p2) * 0.5);
1406 void MapWidget::drawILS(bool tuned, FGRunway* rwy)
1408 // arrow, tip centered on the landing threshold
1409 // using LOC transmitter position would be more accurate, but
1410 // is visually cluttered
1411 // arrow width is based upon the computed localizer width
1413 FGNavRecord* loc = rwy->ILS();
1414 double halfBeamWidth = loc->localizerWidth() * 0.5;
1415 SGVec2d t = project(rwy->threshold());
1417 double rangeM = loc->get_range() * SG_NM_TO_METER;
1418 double radial = loc->get_multiuse();
1419 SG_NORMALIZE_RANGE(radial, 0.0, 360.0);
1422 // compute the three end points at the widge end of the arrow
1423 SGGeodesy::direct(loc->geod(), radial, -rangeM, locEnd, az2);
1424 SGVec2d endCentre = project(locEnd);
1426 SGGeodesy::direct(loc->geod(), radial + halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1427 SGVec2d endR = project(locEnd);
1429 SGGeodesy::direct(loc->geod(), radial - halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1430 SGVec2d endL = project(locEnd);
1432 // outline two triangles
1435 glColor3f(0.0, 1.0, 1.0);
1437 glColor3f(0.0, 0.0, 1.0);
1440 glBegin(GL_LINE_LOOP);
1441 glVertex2dv(t.data());
1442 glVertex2dv(endCentre.data());
1443 glVertex2dv(endL.data());
1445 glBegin(GL_LINE_LOOP);
1446 glVertex2dv(t.data());
1447 glVertex2dv(endCentre.data());
1448 glVertex2dv(endR.data());
1451 if (validDataForKey(loc)) {
1452 setAnchorForKey(loc, endR);
1457 ::snprintf(buffer, 1024, "%s\n%s\n%03d - %3.2fMHz",
1458 loc->ident().c_str(), loc->name().c_str(),
1459 displayHeading(radial),
1460 loc->get_freq()/100.0);
1462 MapData* d = createDataForKey(loc);
1464 d->setLabel(loc->ident());
1466 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1470 void MapWidget::drawTraffic()
1472 if (!_root->getBoolValue("draw-traffic")) {
1476 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1480 const SGPropertyNode* ai = fgGetNode("/ai/models", true);
1482 for (int i = 0; i < ai->nChildren(); ++i) {
1483 const SGPropertyNode *model = ai->getChild(i);
1484 // skip bad or dead entries
1485 if (!model || model->getIntValue("id", -1) == -1) {
1489 const std::string& name(model->getName());
1490 SGGeod pos = SGGeod::fromDegFt(
1491 model->getDoubleValue("position/longitude-deg"),
1492 model->getDoubleValue("position/latitude-deg"),
1493 model->getDoubleValue("position/altitude-ft"));
1495 double dist = SGGeodesy::distanceNm(_projectionCenter, pos);
1496 if (dist > _drawRangeNm) {
1500 double heading = model->getDoubleValue("orientation/true-heading-deg");
1501 if ((name == "aircraft") || (name == "multiplayer") ||
1502 (name == "wingman") || (name == "tanker")) {
1503 drawAIAircraft(model, pos, heading);
1504 } else if ((name == "ship") || (name == "carrier") || (name == "escort")) {
1505 drawAIShip(model, pos, heading);
1507 } // of ai/models iteration
1510 void MapWidget::drawHelipad(FGHelipad* hp)
1512 SGVec2d pos = project(hp->geod());
1514 glColor3f(1.0, 0.0, 1.0);
1515 circleAt(pos, 16, 5.0);
1517 if (validDataForKey(hp)) {
1518 setAnchorForKey(hp, pos);
1523 ::snprintf(buffer, 1024, "%s\n%03d\n%.0f'",
1524 hp->ident().c_str(),
1525 displayHeading(hp->headingDeg()),
1528 MapData* d = createDataForKey(hp);
1530 d->setLabel(hp->ident());
1532 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 8);
1536 void MapWidget::drawAIAircraft(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1539 SGVec2d p = project(pos);
1541 glColor3f(0.0, 0.0, 0.0);
1543 circleAt(p, 4, 6.0); // black diamond
1545 // draw heading vector
1546 int speedKts = static_cast<int>(model->getDoubleValue("velocities/true-airspeed-kt"));
1550 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1551 double distanceM = speedKts * SG_NM_TO_METER * dt;
1555 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1557 drawLine(p, project(advance));
1561 // draw callsign / altitude / speed
1563 ::snprintf(buffer, 1024, "%s\n%d'\n%dkts",
1564 model->getStringValue("callsign", "<>"),
1565 static_cast<int>(pos.getElevationFt() / 50.0) * 50,
1568 MapData* d = getOrCreateDataForKey((void*) model);
1570 d->setLabel(model->getStringValue("callsign", "<>"));
1571 d->setPriority(speedKts > 5 ? 60 : 10); // low priority for parked aircraft
1572 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1577 void MapWidget::drawAIShip(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1579 SGVec2d p = project(pos);
1581 glColor3f(0.0, 0.0, 0.5);
1583 circleAt(p, 4, 6.0); // blue diamond (to differentiate from aircraft.
1585 // draw heading vector
1586 int speedKts = static_cast<int>(model->getDoubleValue("velocities/speed-kts"));
1590 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1591 double distanceM = speedKts * SG_NM_TO_METER * dt;
1595 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1597 drawLine(p, project(advance));
1600 // draw callsign / speed
1602 ::snprintf(buffer, 1024, "%s\n%dkts",
1603 model->getStringValue("name", "<>"),
1606 MapData* d = getOrCreateDataForKey((void*) model);
1608 d->setLabel(model->getStringValue("name", "<>"));
1609 d->setPriority(speedKts > 2 ? 30 : 10); // low priority for slow moving ships
1610 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1614 SGVec2d MapWidget::project(const SGGeod& geod) const
1617 double r = earth_radius_lat(geod.getLatitudeRad());
1619 if (_orthoAzimuthProject) {
1620 // http://mathworld.wolfram.com/OrthographicProjection.html
1621 double cosTheta = cos(geod.getLatitudeRad());
1622 double sinDLambda = sin(geod.getLongitudeRad() - _projectionCenter.getLongitudeRad());
1623 double cosDLambda = cos(geod.getLongitudeRad() - _projectionCenter.getLongitudeRad());
1624 double sinTheta1 = sin(_projectionCenter.getLatitudeRad());
1625 double sinTheta = sin(geod.getLatitudeRad());
1626 double cosTheta1 = cos(_projectionCenter.getLatitudeRad());
1628 p = SGVec2d(cosTheta * sinDLambda,
1629 (cosTheta1 * sinTheta) - (sinTheta1 * cosTheta * cosDLambda)) * r * currentScale();
1632 // Sanson-Flamsteed projection, relative to the projection center
1633 double lonDiff = geod.getLongitudeRad() - _projectionCenter.getLongitudeRad(),
1634 latDiff = geod.getLatitudeRad() - _projectionCenter.getLatitudeRad();
1636 p = SGVec2d(cos(geod.getLatitudeRad()) * lonDiff, latDiff) * r * currentScale();
1640 // rotate as necessary
1641 double cost = cos(_upHeading * SG_DEGREES_TO_RADIANS),
1642 sint = sin(_upHeading * SG_DEGREES_TO_RADIANS);
1643 double rx = cost * p.x() - sint * p.y();
1644 double ry = sint * p.x() + cost * p.y();
1645 return SGVec2d(rx, ry);
1648 SGGeod MapWidget::unproject(const SGVec2d& p) const
1650 // unrotate, if necessary
1651 double cost = cos(-_upHeading * SG_DEGREES_TO_RADIANS),
1652 sint = sin(-_upHeading * SG_DEGREES_TO_RADIANS);
1653 SGVec2d ur(cost * p.x() - sint * p.y(),
1654 sint * p.x() + cost * p.y());
1656 double r = earth_radius_lat(_projectionCenter.getLatitudeRad());
1657 SGVec2d unscaled = ur * (1.0 / (currentScale() * r));
1659 if (_orthoAzimuthProject) {
1660 double phi = length(p);
1661 double c = asin(phi);
1662 double sinTheta1 = sin(_projectionCenter.getLatitudeRad());
1663 double cosTheta1 = cos(_projectionCenter.getLatitudeRad());
1665 double lat = asin(cos(c) * sinTheta1 + ((unscaled.y() * sin(c) * cosTheta1) / phi));
1666 double lon = _projectionCenter.getLongitudeRad() +
1667 atan((unscaled.x()* sin(c)) / (phi * cosTheta1 * cos(c) - unscaled.y() * sinTheta1 * sin(c)));
1668 return SGGeod::fromRad(lon, lat);
1670 double lat = unscaled.y() + _projectionCenter.getLatitudeRad();
1671 double lon = (unscaled.x() / cos(lat)) + _projectionCenter.getLongitudeRad();
1672 return SGGeod::fromRad(lon, lat);
1676 double MapWidget::currentScale() const
1678 return 1.0 / pow(2.0, _cachedZoom);
1681 void MapWidget::circleAt(const SGVec2d& center, int nSides, double r)
1683 glBegin(GL_LINE_LOOP);
1684 double advance = (SGD_PI * 2) / nSides;
1685 glVertex2d(center.x(), center.y() + r);
1687 for (int i=1; i<nSides; ++i) {
1688 glVertex2d(center.x() + (sin(t) * r), center.y() + (cos(t) * r));
1694 void MapWidget::circleAtAlt(const SGVec2d& center, int nSides, double r, double r2)
1696 glBegin(GL_LINE_LOOP);
1697 double advance = (SGD_PI * 2) / nSides;
1698 glVertex2d(center.x(), center.y() + r);
1700 for (int i=1; i<nSides; ++i) {
1701 double rr = (i%2 == 0) ? r : r2;
1702 glVertex2d(center.x() + (sin(t) * rr), center.y() + (cos(t) * rr));
1708 void MapWidget::drawLine(const SGVec2d& p1, const SGVec2d& p2)
1711 glVertex2dv(p1.data());
1712 glVertex2dv(p2.data());
1716 void MapWidget::drawLegendBox(const SGVec2d& pos, const std::string& t)
1718 std::vector<std::string> lines(simgear::strutils::split(t, "\n"));
1719 const int LINE_LEADING = 4;
1720 const int MARGIN = 4;
1723 int maxWidth = -1, totalHeight = 0;
1724 int lineHeight = legendFont.getStringHeight();
1726 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1727 totalHeight += lineHeight;
1729 totalHeight += LINE_LEADING;
1732 int lw = legendFont.getStringWidth(lines[ln].c_str());
1733 maxWidth = std::max(maxWidth, lw);
1734 } // of line measurement
1737 return; // all lines are empty, don't draw
1740 totalHeight += MARGIN * 2;
1745 box.min[1] = -totalHeight;
1746 box.max[0] = maxWidth + (MARGIN * 2);
1749 box.draw (pos.x(), pos.y(), PUSTYLE_DROPSHADOW, colour, FALSE, border);
1752 int xPos = pos.x() + MARGIN;
1753 int yPos = pos.y() - (lineHeight + MARGIN);
1754 glColor3f(0.8, 0.8, 0.8);
1756 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1757 legendFont.drawString(lines[ln].c_str(), xPos, yPos);
1758 yPos -= lineHeight + LINE_LEADING;
1762 void MapWidget::drawData()
1764 std::sort(_dataQueue.begin(), _dataQueue.end(), MapData::order);
1766 int hw = _width >> 1,
1768 puBox visBox(makePuBox(-hw, -hh, _width, _height));
1772 std::vector<MapData*> drawQueue;
1774 bool drawData = _root->getBoolValue("draw-data");
1775 const int MAX_DRAW_DATA = 25;
1776 const int MAX_DRAW = 50;
1778 for (; (d < _dataQueue.size()) && (drawn < MAX_DRAW); ++d) {
1779 MapData* md = _dataQueue[d];
1780 md->setDataVisible(drawData);
1782 if (md->isClipped(visBox)) {
1786 if (md->overlaps(drawQueue)) {
1787 if (drawData) { // overlapped with data, let's try just the label
1788 md->setDataVisible(false);
1789 if (md->overlaps(drawQueue)) {
1795 } // of overlaps case
1797 drawQueue.push_back(md);
1799 if (drawData && (drawn >= MAX_DRAW_DATA)) {
1804 // draw lowest-priority first, so higher-priorty items appear on top
1805 std::vector<MapData*>::reverse_iterator r;
1806 for (r = drawQueue.rbegin(); r!= drawQueue.rend(); ++r) {
1811 KeyDataMap::iterator it = _mapData.begin();
1812 for (; it != _mapData.end(); ) {
1814 if (it->second->isExpired()) {
1816 KeyDataMap::iterator cur = it++;
1817 _mapData.erase(cur);
1821 } // of expiry iteration
1824 bool MapWidget::validDataForKey(void* key)
1826 KeyDataMap::iterator it = _mapData.find(key);
1827 if (it == _mapData.end()) {
1828 return false; // no valid data for the key!
1831 it->second->resetAge(); // mark data as valid this frame
1832 _dataQueue.push_back(it->second);
1836 void MapWidget::setAnchorForKey(void* key, const SGVec2d& anchor)
1838 KeyDataMap::iterator it = _mapData.find(key);
1839 if (it == _mapData.end()) {
1840 throw sg_exception("no valid data for key!");
1843 it->second->setAnchor(anchor);
1846 MapData* MapWidget::getOrCreateDataForKey(void* key)
1848 KeyDataMap::iterator it = _mapData.find(key);
1849 if (it == _mapData.end()) {
1850 return createDataForKey(key);
1853 it->second->resetAge(); // mark data as valid this frame
1854 _dataQueue.push_back(it->second);
1858 MapData* MapWidget::createDataForKey(void* key)
1860 KeyDataMap::iterator it = _mapData.find(key);
1861 if (it != _mapData.end()) {
1862 throw sg_exception("duplicate data requested for key!");
1865 MapData* d = new MapData(0);
1867 _dataQueue.push_back(d);
1872 void MapWidget::clearData()
1874 KeyDataMap::iterator it = _mapData.begin();
1875 for (; it != _mapData.end(); ++it) {
1882 int MapWidget::displayHeading(double h) const
1884 if (_magneticHeadings) {
1885 h -= _magVar->get_magvar() * SG_RADIANS_TO_DEGREES;
1888 SG_NORMALIZE_RANGE(h, 0.0, 360.0);
1889 return SGMiscd::roundToInt(h);