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;
391 _magneticHeadings = false;
393 MapData::setFont(legendFont);
394 MapData::setPalette(colour);
396 _magVar = new SGMagVar();
399 MapWidget::~MapWidget()
405 void MapWidget::setProperty(SGPropertyNode_ptr prop)
408 int zoom = _root->getIntValue("zoom", -1);
410 _root->setIntValue("zoom", 6); // default zoom
413 // expose MAX_ZOOM to the UI
414 _root->setIntValue("max-zoom", MAX_ZOOM);
415 _root->setBoolValue("centre-on-aircraft", true);
416 _root->setBoolValue("draw-data", false);
417 _root->setBoolValue("draw-flight-history", false);
418 _root->setBoolValue("magnetic-headings", true);
421 void MapWidget::setSize(int w, int h)
423 puObject::setSize(w, h);
430 void MapWidget::doHit( int button, int updown, int x, int y )
432 puObject::doHit(button, updown, x, y);
433 if (updown == PU_DRAG) {
438 if (button == 3) { // mouse-wheel up
440 } else if (button == 4) { // mouse-wheel down
444 if (button != active_mouse_button) {
448 _hitLocation = SGVec2d(x - abox.min[0], y - abox.min[1]);
450 if (updown == PU_UP) {
451 puDeactivateWidget();
452 } else if (updown == PU_DOWN) {
453 puSetActiveWidget(this, x, y);
455 if (fgGetKeyModifiers() & KEYMOD_CTRL) {
456 _clickGeod = unproject(_hitLocation - SGVec2d(_width>>1, _height>>1));
461 void MapWidget::handlePan(int x, int y)
463 SGVec2d delta = SGVec2d(x, y) - _hitLocation;
465 _hitLocation = SGVec2d(x,y);
468 int MapWidget::checkKey (int key, int updown )
470 if ((updown == PU_UP) || !isVisible () || !isActive () || (window != puGetWindow())) {
478 pan(SGVec2d(0, -CURSOR_PAN_STEP));
482 pan(SGVec2d(0, CURSOR_PAN_STEP));
486 pan(SGVec2d(CURSOR_PAN_STEP, 0));
490 pan(SGVec2d(-CURSOR_PAN_STEP, 0));
509 void MapWidget::pan(const SGVec2d& delta)
512 _projectionCenter = unproject(-delta);
515 int MapWidget::zoom() const
517 int z = _root->getIntValue("zoom");
518 SG_CLAMP_RANGE(z, 0, MAX_ZOOM);
522 void MapWidget::zoomIn()
524 if (zoom() >= MAX_ZOOM) {
528 _root->setIntValue("zoom", zoom() + 1);
531 void MapWidget::zoomOut()
537 _root->setIntValue("zoom", zoom() - 1);
540 void MapWidget::draw(int dx, int dy)
542 _aircraft = globals->get_aircraft_position();
544 bool mag = _root->getBoolValue("magnetic-headings");
545 if (mag != _magneticHeadings) {
546 clearData(); // flush cached data text, since it often includes heading
547 _magneticHeadings = mag;
551 _root->setBoolValue("centre-on-aircraft", false);
554 else if (_root->getBoolValue("centre-on-aircraft")) {
555 _projectionCenter = _aircraft;
558 double julianDate = globals->get_time_params()->getJD();
559 _magVar->update(_projectionCenter, julianDate);
561 bool aircraftUp = _root->getBoolValue("aircraft-heading-up");
563 _upHeading = fgGetDouble("/orientation/heading-deg");
568 _cachedZoom = MAX_ZOOM - zoom();
569 SGGeod topLeft = unproject(SGVec2d(_width/2, _height/2));
570 // compute draw range, including a fudge factor for ILSs and other 'long'
572 _drawRangeNm = SGGeodesy::distanceNm(_projectionCenter, topLeft) + 10.0;
574 // drawing operations
575 GLint sx = (int) abox.min[0],
576 sy = (int) abox.min[1];
577 glScissor(dx + sx, dy + sy, _width, _height);
578 glEnable(GL_SCISSOR_TEST);
580 glMatrixMode(GL_MODELVIEW);
582 // cetere drawing about the widget center (which is also the
583 // projection centre)
584 glTranslated(dx + sx + (_width/2), dy + sy + (_height/2), 0.0);
589 int textHeight = legendFont.getStringHeight() + 5;
592 SGVec2d loc = project(_aircraft);
593 glColor3f(1.0, 1.0, 1.0);
594 drawLine(loc, SGVec2d(loc.x(), (_height / 2) - textHeight));
597 if (_magneticHeadings) {
598 displayHdg = (int) fgGetDouble("/orientation/heading-magnetic-deg");
600 displayHdg = (int) _upHeading;
603 double y = (_height / 2) - textHeight;
605 ::snprintf(buf, 16, "%d", displayHdg);
606 int sw = legendFont.getStringWidth(buf);
607 legendFont.drawString(buf, loc.x() - sw/2, y);
615 drawNavRadio(fgGetNode("/instrumentation/nav[0]", false));
616 drawNavRadio(fgGetNode("/instrumentation/nav[1]", false));
617 paintAircraftLocation(_aircraft);
625 glDisable(GL_SCISSOR_TEST);
628 void MapWidget::paintRuler()
630 if (_clickGeod == SGGeod()) {
634 SGVec2d acftPos = project(_aircraft);
635 SGVec2d clickPos = project(_clickGeod);
637 glColor4f(0.0, 1.0, 1.0, 0.6);
638 drawLine(acftPos, clickPos);
640 circleAtAlt(clickPos, 8, 10, 5);
642 double dist, az, az2;
643 SGGeodesy::inverse(_aircraft, _clickGeod, az, az2, dist);
645 ::snprintf(buffer, 1024, "%03d/%.1fnm",
646 displayHeading(az), dist * SG_METER_TO_NM);
648 MapData* d = getOrCreateDataForKey((void*) RULER_LEGEND_KEY);
650 d->setAnchor(clickPos);
651 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
652 d->setPriority(20000);
657 void MapWidget::paintAircraftLocation(const SGGeod& aircraftPos)
659 SGVec2d loc = project(aircraftPos);
661 double hdg = fgGetDouble("/orientation/heading-deg");
664 glColor4f(1.0, 1.0, 0.0, 1.0);
666 glTranslated(loc.x(), loc.y(), 0.0);
667 glRotatef(hdg - _upHeading, 0.0, 0.0, -1.0);
669 const SGVec2d wingspan(12, 0);
670 const SGVec2d nose(0, 8);
671 const SGVec2d tail(0, -14);
672 const SGVec2d tailspan(4,0);
674 drawLine(-wingspan, wingspan);
675 drawLine(nose, tail);
676 drawLine(tail - tailspan, tail + tailspan);
682 void MapWidget::paintRoute()
684 if (_route->numWaypts() < 2) {
688 RoutePath path(_route->flightPlan());
690 // first pass, draw the actual lines
693 for (int w=0; w<_route->numWaypts(); ++w) {
694 SGGeodVec gv(path.pathForIndex(w));
699 if (w < _route->currentIndex()) {
700 glColor4f(0.5, 0.5, 0.5, 0.7);
702 glColor4f(1.0, 0.0, 1.0, 1.0);
705 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
706 if (wpt->flag(flightgear::WPT_MISS)) {
707 glEnable(GL_LINE_STIPPLE);
708 glLineStipple(1, 0x00FF);
711 glBegin(GL_LINE_STRIP);
712 for (unsigned int i=0; i<gv.size(); ++i) {
713 SGVec2d p = project(gv[i]);
714 glVertex2d(p.x(), p.y());
718 glDisable(GL_LINE_STIPPLE);
722 // second pass, draw waypoint symbols and data
723 for (int w=0; w < _route->numWaypts(); ++w) {
724 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
725 SGGeod g = path.positionForIndex(w);
727 continue; // Vectors or similar
730 SGVec2d p = project(g);
731 glColor4f(1.0, 0.0, 1.0, 1.0);
732 circleAtAlt(p, 8, 12, 5);
734 std::ostringstream legend;
735 legend << wpt->ident();
736 if (wpt->altitudeRestriction() != flightgear::RESTRICT_NONE) {
737 legend << '\n' << SGMiscd::roundToInt(wpt->altitudeFt()) << '\'';
740 if (wpt->speedRestriction() == flightgear::SPEED_RESTRICT_MACH) {
741 legend << '\n' << wpt->speedMach() << "M";
742 } else if (wpt->speedRestriction() != flightgear::RESTRICT_NONE) {
743 legend << '\n' << SGMiscd::roundToInt(wpt->speedKts()) << "Kts";
746 MapData* d = getOrCreateDataForKey(reinterpret_cast<void*>(w * 2));
747 d->setText(legend.str());
748 d->setLabel(wpt->ident());
750 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
751 d->setPriority(w < _route->currentIndex() ? 9000 : 12000);
753 } // of second waypoint iteration
756 void MapWidget::drawFlightHistory()
758 FGFlightHistory* history = (FGFlightHistory*) globals->get_subsystem("history");
759 if (!history || !_root->getBoolValue("draw-flight-history")) {
763 // first pass, draw the actual lines
766 SGGeodVec gv(history->pathForHistory());
767 glColor4f(0.0, 0.0, 1.0, 0.7);
769 glBegin(GL_LINE_STRIP);
770 for (unsigned int i=0; i<gv.size(); ++i) {
771 SGVec2d p = project(gv[i]);
772 glVertex2d(p.x(), p.y());
779 * Round a SGGeod to an arbitrary precision.
780 * For example, passing precision of 0.5 will round to the nearest 0.5 of
781 * a degree in both lat and lon - passing in 3.0 rounds to the nearest 3 degree
782 * multiple, and so on.
784 static SGGeod roundGeod(double precision, const SGGeod& g)
786 double lon = SGMiscd::round(g.getLongitudeDeg() / precision);
787 double lat = SGMiscd::round(g.getLatitudeDeg() / precision);
789 return SGGeod::fromDeg(lon * precision, lat * precision);
792 bool MapWidget::drawLineClipped(const SGVec2d& a, const SGVec2d& b)
794 double minX = SGMiscd::min(a.x(), b.x()),
795 minY = SGMiscd::min(a.y(), b.y()),
796 maxX = SGMiscd::max(a.x(), b.x()),
797 maxY = SGMiscd::max(a.y(), b.y());
799 int hh = _height >> 1, hw = _width >> 1;
801 if ((maxX < -hw) || (minX > hw) || (minY > hh) || (maxY < -hh)) {
805 glVertex2dv(a.data());
806 glVertex2dv(b.data());
810 SGVec2d MapWidget::gridPoint(int ix, int iy)
812 int key = (ix + 0x7fff) | ((iy + 0x7fff) << 16);
813 GridPointCache::iterator it = _gridCache.find(key);
814 if (it != _gridCache.end()) {
818 SGGeod gp = SGGeod::fromDeg(
819 _gridCenter.getLongitudeDeg() + ix * _gridSpacing,
820 _gridCenter.getLatitudeDeg() + iy * _gridSpacing);
822 SGVec2d proj = project(gp);
823 _gridCache[key] = proj;
827 void MapWidget::drawLatLonGrid()
830 _gridCenter = roundGeod(_gridSpacing, _projectionCenter);
836 glColor4f(0.8, 0.8, 0.8, 0.4);
844 for (int x = -ix; x < ix; ++x) {
845 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x+1, -iy));
846 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x+1, iy));
847 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x, -iy + 1));
848 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x, iy - 1));
852 for (int y = -iy; y < iy; ++y) {
853 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix, y+1));
854 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix + 1, y));
855 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix, y+1));
856 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix - 1, y));
867 void MapWidget::drawGPSData()
869 std::string gpsMode = _gps->getStringValue("mode");
871 SGGeod wp0Geod = SGGeod::fromDeg(
872 _gps->getDoubleValue("wp/wp[0]/longitude-deg"),
873 _gps->getDoubleValue("wp/wp[0]/latitude-deg"));
875 SGGeod wp1Geod = SGGeod::fromDeg(
876 _gps->getDoubleValue("wp/wp[1]/longitude-deg"),
877 _gps->getDoubleValue("wp/wp[1]/latitude-deg"));
880 double gpsTrackDeg = _gps->getDoubleValue("indicated-track-true-deg");
881 double gpsSpeed = _gps->getDoubleValue("indicated-ground-speed-kt");
884 if (gpsSpeed > 3.0) { // only draw track line if valid
886 SGGeodesy::direct(_aircraft, gpsTrackDeg, _drawRangeNm * SG_NM_TO_METER, trackRadial, az2);
888 glColor4f(1.0, 1.0, 0.0, 1.0);
889 glEnable(GL_LINE_STIPPLE);
890 glLineStipple(1, 0x00FF);
891 drawLine(project(_aircraft), project(trackRadial));
892 glDisable(GL_LINE_STIPPLE);
895 if (gpsMode == "dto") {
896 SGVec2d wp0Pos = project(wp0Geod);
897 SGVec2d wp1Pos = project(wp1Geod);
899 glColor4f(1.0, 0.0, 1.0, 1.0);
900 drawLine(wp0Pos, wp1Pos);
904 if (_gps->getBoolValue("scratch/valid")) {
910 class MapAirportFilter : public FGAirport::AirportFilter
913 MapAirportFilter(SGPropertyNode_ptr nd)
915 _heliports = nd->getBoolValue("show-heliports", false);
916 _hardRunwaysOnly = nd->getBoolValue("hard-surfaced-airports", true);
917 _minLengthFt = fgGetDouble("/sim/navdb/min-runway-length-ft", 2000);
920 virtual FGPositioned::Type maxType() const {
921 return _heliports ? FGPositioned::HELIPORT : FGPositioned::AIRPORT;
924 virtual bool passAirport(FGAirport* aApt) const {
925 if (_hardRunwaysOnly) {
926 return aApt->hasHardRunwayOfLengthFt(_minLengthFt);
934 bool _hardRunwaysOnly;
938 void MapWidget::drawAirports()
940 MapAirportFilter af(_root);
941 bool partial = false;
942 FGPositionedList apts = FGPositioned::findWithinRangePartial(_projectionCenter, _drawRangeNm, &af, partial);
943 for (unsigned int i=0; i<apts.size(); ++i) {
944 drawAirport((FGAirport*) apts[i].get());
948 class NavaidFilter : public FGPositioned::Filter
951 NavaidFilter(bool fixesEnabled, bool navaidsEnabled) :
952 _fixes(fixesEnabled),
953 _navaids(navaidsEnabled)
956 virtual bool pass(FGPositioned* aPos) const {
957 if (_fixes && (aPos->type() == FGPositioned::FIX)) {
958 // ignore fixes which end in digits - expirmental
959 if (aPos->ident().length() > 4 && isdigit(aPos->ident()[3]) && isdigit(aPos->ident()[4])) {
967 virtual FGPositioned::Type minType() const {
968 return _fixes ? FGPositioned::FIX : FGPositioned::NDB;
971 virtual FGPositioned::Type maxType() const {
972 return _navaids ? FGPositioned::VOR : FGPositioned::FIX;
976 bool _fixes, _navaids;
979 void MapWidget::drawNavaids()
981 bool fixes = _root->getBoolValue("draw-fixes");
982 NavaidFilter f(fixes, _root->getBoolValue("draw-navaids"));
984 if (f.minType() <= f.maxType()) {
985 FGPositionedList navs = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &f);
988 for (unsigned int i=0; i<navs.size(); ++i) {
989 FGPositioned::Type ty = navs[i]->type();
990 if (ty == FGPositioned::NDB) {
991 drawNDB(false, (FGNavRecord*) navs[i].get());
992 } else if (ty == FGPositioned::VOR) {
993 drawVOR(false, (FGNavRecord*) navs[i].get());
994 } else if (ty == FGPositioned::FIX) {
995 drawFix((FGFix*) navs[i].get());
997 } // of navaid iteration
998 } // of navaids || fixes are drawn test
1001 void MapWidget::drawPOIs()
1003 FGPositioned::TypeFilter f(FGPositioned::COUNTRY);
1004 f.addType(FGPositioned::CITY);
1005 f.addType(FGPositioned::TOWN);
1006 FGPositionedList poi = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &f);
1009 for (unsigned int i=0; i<poi.size(); ++i) {
1010 FGPositioned::Type ty = poi[i]->type();
1011 if (ty == FGPositioned::COUNTRY) {
1012 drawCountries((FGNavRecord*) poi[i].get());
1013 } else if (ty == FGPositioned::CITY) {
1014 drawCities((FGNavRecord*) poi[i].get());
1015 } else if (ty == FGPositioned::TOWN) {
1016 drawTowns((FGNavRecord*) poi[i].get());
1018 } // of navaid iteration
1021 void MapWidget::drawNDB(bool tuned, FGNavRecord* ndb)
1023 SGVec2d pos = project(ndb->geod());
1026 glColor3f(0.0, 1.0, 1.0);
1028 glColor3f(0.0, 0.0, 0.0);
1031 glEnable(GL_LINE_STIPPLE);
1032 glLineStipple(1, 0x00FF);
1033 circleAt(pos, 20, 6);
1034 circleAt(pos, 20, 10);
1035 glDisable(GL_LINE_STIPPLE);
1037 if (validDataForKey(ndb)) {
1038 setAnchorForKey(ndb, pos);
1043 ::snprintf(buffer, 1024, "%s\n%s %3.0fKhz",
1044 ndb->name().c_str(), ndb->ident().c_str(),ndb->get_freq()/100.0);
1046 MapData* d = createDataForKey(ndb);
1048 d->setLabel(ndb->ident());
1050 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1055 void MapWidget::drawVOR(bool tuned, FGNavRecord* vor)
1057 SGVec2d pos = project(vor->geod());
1059 glColor3f(0.0, 1.0, 1.0);
1061 glColor3f(0.0, 0.0, 1.0);
1064 circleAt(pos, 6, 9);
1065 circleAt(pos, 8, 1);
1070 if (validDataForKey(vor)) {
1071 setAnchorForKey(vor, pos);
1076 ::snprintf(buffer, 1024, "%s\n%s %6.3fMhz",
1077 vor->name().c_str(), vor->ident().c_str(),
1078 vor->get_freq() / 100.0);
1080 MapData* d = createDataForKey(vor);
1082 d->setLabel(vor->ident());
1083 d->setPriority(tuned ? 10000 : 100);
1084 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1088 void MapWidget::drawFix(FGFix* fix)
1090 SGVec2d pos = project(fix->geod());
1091 glColor3f(0.0, 0.0, 0.0);
1092 circleAt(pos, 3, 6);
1094 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1095 return; // hide fix labels beyond a certain zoom level
1098 if (validDataForKey(fix)) {
1099 setAnchorForKey(fix, pos);
1103 MapData* d = createDataForKey(fix);
1104 d->setLabel(fix->ident());
1106 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1110 void MapWidget::drawNavRadio(SGPropertyNode_ptr radio)
1112 if (!radio || radio->getBoolValue("slaved-to-gps", false)
1113 || !radio->getBoolValue("in-range", false)) {
1117 if (radio->getBoolValue("nav-loc", false)) {
1118 drawTunedLocalizer(radio);
1121 // identify the tuned station - unfortunately we don't get lat/lon directly,
1122 // need to do the frequency search again
1123 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1125 FGNavRecord* nav = FGNavList::findByFreq(mhz, _aircraft,
1126 FGNavList::navFilter());
1127 if (!nav || (nav->ident() != radio->getStringValue("nav-id"))) {
1128 // mismatch between navradio selection logic and ours!
1135 SGVec2d pos = project(nav->geod());
1138 double trueRadial = radio->getDoubleValue("radials/target-radial-deg");
1139 SGGeodesy::direct(nav->geod(), trueRadial, nav->get_range() * SG_NM_TO_METER, range, az2);
1140 SGVec2d prange = project(range);
1142 SGVec2d norm = normalize(prange - pos);
1143 SGVec2d perp(norm.y(), -norm.x());
1145 circleAt(pos, 64, length(prange - pos));
1146 drawLine(pos, prange);
1148 // draw to/from arrows
1149 SGVec2d midPoint = (pos + prange) * 0.5;
1150 if (radio->getBoolValue("from-flag")) {
1156 SGVec2d arrowB = midPoint - (norm * sz) + (perp * sz);
1157 SGVec2d arrowC = midPoint - (norm * sz) - (perp * sz);
1158 drawLine(midPoint, arrowB);
1159 drawLine(arrowB, arrowC);
1160 drawLine(arrowC, midPoint);
1162 drawLine(pos, (2 * pos) - prange); // reciprocal radial
1165 void MapWidget::drawTunedLocalizer(SGPropertyNode_ptr radio)
1167 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1168 FGNavRecord* loc = FGNavList::findByFreq(mhz, _aircraft, FGNavList::locFilter());
1169 if (!loc || (loc->ident() != radio->getStringValue("nav-id"))) {
1170 // mismatch between navradio selection logic and ours!
1174 if (loc->runway()) {
1175 drawILS(true, loc->runway());
1179 void MapWidget::drawCountries(FGNavRecord* rec)
1181 if (_cachedZoom < 9) {
1182 return; // hide labels beyond a certain zoom level
1185 SGVec2d pos = project(rec->geod());
1186 glColor3f(1.0, 1.0, 0.0);
1188 circleAt(pos, 4, 10);
1190 if (validDataForKey(rec)) {
1191 setAnchorForKey(rec, pos);
1196 ::snprintf(buffer, 1024, "%s",
1197 rec->name().c_str());
1199 MapData* d = createDataForKey(rec);
1200 d->setPriority(200);
1201 d->setLabel(rec->ident());
1203 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1208 void MapWidget::drawCities(FGNavRecord* rec)
1210 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1211 return; // hide labels beyond a certain zoom level
1214 SGVec2d pos = project(rec->geod());
1215 glColor3f(0.0, 1.0, 0.0);
1217 circleAt(pos, 4, 8);
1219 if (validDataForKey(rec)) {
1220 setAnchorForKey(rec, pos);
1225 ::snprintf(buffer, 1024, "%s",
1226 rec->name().c_str());
1228 MapData* d = createDataForKey(rec);
1230 d->setLabel(rec->ident());
1232 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1237 void MapWidget::drawTowns(FGNavRecord* rec)
1239 if (_cachedZoom > SHOW_DETAIL2_ZOOM) {
1240 return; // hide labels beyond a certain zoom level
1243 SGVec2d pos = project(rec->geod());
1244 glColor3f(0.2, 1.0, 0.0);
1246 circleAt(pos, 4, 5);
1248 if (validDataForKey(rec)) {
1249 setAnchorForKey(rec, pos);
1254 ::snprintf(buffer, 1024, "%s",
1255 rec->name().c_str());
1257 MapData* d = createDataForKey(rec);
1259 d->setLabel(rec->ident());
1261 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1267 void MapWidget::drawObstacle(FGPositioned* obs)
1269 SGVec2d pos = project(obs->geod());
1270 glColor3f(0.0, 0.0, 0.0);
1272 drawLine(pos, pos + SGVec2d());
1276 void MapWidget::drawAirport(FGAirport* apt)
1278 // draw tower location
1279 SGVec2d towerPos = project(apt->getTowerLocation());
1281 if (_cachedZoom <= SHOW_DETAIL_ZOOM) {
1282 glColor3f(1.0, 1.0, 1.0);
1285 drawLine(towerPos + SGVec2d(3, 0), towerPos + SGVec2d(3, 10));
1286 drawLine(towerPos + SGVec2d(-3, 0), towerPos + SGVec2d(-3, 10));
1287 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(-3, 10));
1288 drawLine(towerPos + SGVec2d(6, 20), towerPos + SGVec2d(3, 10));
1289 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(6, 20));
1292 if (validDataForKey(apt)) {
1293 setAnchorForKey(apt, towerPos);
1296 ::snprintf(buffer, 1024, "%s\n%s",
1297 apt->ident().c_str(), apt->name().c_str());
1299 MapData* d = createDataForKey(apt);
1301 d->setLabel(apt->ident());
1302 d->setPriority(100 + scoreAirportRunways(apt));
1303 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 6);
1304 d->setAnchor(towerPos);
1307 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1311 FGRunwayList runways(apt->getRunwaysWithoutReciprocals());
1313 for (unsigned int r=0; r<runways.size(); ++r) {
1314 drawRunwayPre(runways[r]);
1317 for (unsigned int r=0; r<runways.size(); ++r) {
1318 FGRunway* rwy = runways[r];
1322 drawILS(false, rwy);
1325 if (rwy->reciprocalRunway()) {
1326 FGRunway* recip = rwy->reciprocalRunway();
1328 drawILS(false, recip);
1333 for (unsigned int r=0; r<apt->numHelipads(); ++r) {
1334 FGHelipad* hp = apt->getHelipadByIndex(r);
1336 } // of runway iteration
1340 int MapWidget::scoreAirportRunways(FGAirport* apt)
1342 bool needHardSurface = _root->getBoolValue("hard-surfaced-airports", true);
1343 double minLength = _root->getDoubleValue("min-runway-length-ft", 2000.0);
1345 FGRunwayList runways(apt->getRunwaysWithoutReciprocals());
1348 for (unsigned int r=0; r<runways.size(); ++r) {
1349 FGRunway* rwy = runways[r];
1350 if (needHardSurface && !rwy->isHardSurface()) {
1354 if (rwy->lengthFt() < minLength) {
1358 int scoreLength = SGMiscd::roundToInt(rwy->lengthFt() / 200.0);
1359 score += scoreLength;
1360 } // of runways iteration
1365 void MapWidget::drawRunwayPre(FGRunway* rwy)
1367 SGVec2d p1 = project(rwy->begin());
1368 SGVec2d p2 = project(rwy->end());
1371 glColor3f(1.0, 0.0, 1.0);
1375 void MapWidget::drawRunway(FGRunway* rwy)
1378 // optionally show active, stopway, etc
1379 // in legend, show published heading and length
1380 // and threshold elevation
1382 SGVec2d p1 = project(rwy->begin());
1383 SGVec2d p2 = project(rwy->end());
1385 glColor3f(1.0, 1.0, 1.0);
1386 SGVec2d inset = normalize(p2 - p1) * 2;
1388 drawLine(p1 + inset, p2 - inset);
1390 if (validDataForKey(rwy)) {
1391 setAnchorForKey(rwy, (p1 + p2) * 0.5);
1396 ::snprintf(buffer, 1024, "%s/%s\n%03d/%03d\n%.0f'",
1397 rwy->ident().c_str(),
1398 rwy->reciprocalRunway()->ident().c_str(),
1399 displayHeading(rwy->headingDeg()),
1400 displayHeading(rwy->reciprocalRunway()->headingDeg()),
1403 MapData* d = createDataForKey(rwy);
1405 d->setLabel(rwy->ident() + "/" + rwy->reciprocalRunway()->ident());
1407 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1408 d->setAnchor((p1 + p2) * 0.5);
1411 void MapWidget::drawILS(bool tuned, FGRunway* rwy)
1413 // arrow, tip centered on the landing threshold
1414 // using LOC transmitter position would be more accurate, but
1415 // is visually cluttered
1416 // arrow width is based upon the computed localizer width
1418 FGNavRecord* loc = rwy->ILS();
1419 double halfBeamWidth = loc->localizerWidth() * 0.5;
1420 SGVec2d t = project(rwy->threshold());
1422 double rangeM = loc->get_range() * SG_NM_TO_METER;
1423 double radial = loc->get_multiuse();
1424 SG_NORMALIZE_RANGE(radial, 0.0, 360.0);
1427 // compute the three end points at the widge end of the arrow
1428 SGGeodesy::direct(loc->geod(), radial, -rangeM, locEnd, az2);
1429 SGVec2d endCentre = project(locEnd);
1431 SGGeodesy::direct(loc->geod(), radial + halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1432 SGVec2d endR = project(locEnd);
1434 SGGeodesy::direct(loc->geod(), radial - halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1435 SGVec2d endL = project(locEnd);
1437 // outline two triangles
1440 glColor3f(0.0, 1.0, 1.0);
1442 glColor3f(0.0, 0.0, 1.0);
1445 glBegin(GL_LINE_LOOP);
1446 glVertex2dv(t.data());
1447 glVertex2dv(endCentre.data());
1448 glVertex2dv(endL.data());
1450 glBegin(GL_LINE_LOOP);
1451 glVertex2dv(t.data());
1452 glVertex2dv(endCentre.data());
1453 glVertex2dv(endR.data());
1456 if (validDataForKey(loc)) {
1457 setAnchorForKey(loc, endR);
1462 ::snprintf(buffer, 1024, "%s\n%s\n%03d - %3.2fMHz",
1463 loc->ident().c_str(), loc->name().c_str(),
1464 displayHeading(radial),
1465 loc->get_freq()/100.0);
1467 MapData* d = createDataForKey(loc);
1469 d->setLabel(loc->ident());
1471 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1475 void MapWidget::drawTraffic()
1477 if (!_root->getBoolValue("draw-traffic")) {
1481 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1485 const SGPropertyNode* ai = fgGetNode("/ai/models", true);
1487 for (int i = 0; i < ai->nChildren(); ++i) {
1488 const SGPropertyNode *model = ai->getChild(i);
1489 // skip bad or dead entries
1490 if (!model || model->getIntValue("id", -1) == -1) {
1494 const std::string& name(model->getName());
1495 SGGeod pos = SGGeod::fromDegFt(
1496 model->getDoubleValue("position/longitude-deg"),
1497 model->getDoubleValue("position/latitude-deg"),
1498 model->getDoubleValue("position/altitude-ft"));
1500 double dist = SGGeodesy::distanceNm(_projectionCenter, pos);
1501 if (dist > _drawRangeNm) {
1505 double heading = model->getDoubleValue("orientation/true-heading-deg");
1506 if ((name == "aircraft") || (name == "multiplayer") ||
1507 (name == "wingman") || (name == "tanker")) {
1508 drawAIAircraft(model, pos, heading);
1509 } else if ((name == "ship") || (name == "carrier") || (name == "escort")) {
1510 drawAIShip(model, pos, heading);
1512 } // of ai/models iteration
1515 void MapWidget::drawHelipad(FGHelipad* hp)
1517 SGVec2d pos = project(hp->geod());
1519 glColor3f(1.0, 0.0, 1.0);
1520 circleAt(pos, 16, 5.0);
1522 if (validDataForKey(hp)) {
1523 setAnchorForKey(hp, pos);
1528 ::snprintf(buffer, 1024, "%s\n%03d\n%.0f'",
1529 hp->ident().c_str(),
1530 displayHeading(hp->headingDeg()),
1533 MapData* d = createDataForKey(hp);
1535 d->setLabel(hp->ident());
1537 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 8);
1541 void MapWidget::drawAIAircraft(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1544 SGVec2d p = project(pos);
1546 glColor3f(0.0, 0.0, 0.0);
1548 circleAt(p, 4, 6.0); // black diamond
1550 // draw heading vector
1551 int speedKts = static_cast<int>(model->getDoubleValue("velocities/true-airspeed-kt"));
1555 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1556 double distanceM = speedKts * SG_NM_TO_METER * dt;
1560 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1562 drawLine(p, project(advance));
1566 // draw callsign / altitude / speed
1568 ::snprintf(buffer, 1024, "%s\n%d'\n%dkts",
1569 model->getStringValue("callsign", "<>"),
1570 static_cast<int>(pos.getElevationFt() / 50.0) * 50,
1573 MapData* d = getOrCreateDataForKey((void*) model);
1575 d->setLabel(model->getStringValue("callsign", "<>"));
1576 d->setPriority(speedKts > 5 ? 60 : 10); // low priority for parked aircraft
1577 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1582 void MapWidget::drawAIShip(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1584 SGVec2d p = project(pos);
1586 glColor3f(0.0, 0.0, 0.5);
1588 circleAt(p, 4, 6.0); // blue diamond (to differentiate from aircraft.
1590 // draw heading vector
1591 int speedKts = static_cast<int>(model->getDoubleValue("velocities/speed-kts"));
1595 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1596 double distanceM = speedKts * SG_NM_TO_METER * dt;
1600 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1602 drawLine(p, project(advance));
1605 // draw callsign / speed
1607 ::snprintf(buffer, 1024, "%s\n%dkts",
1608 model->getStringValue("name", "<>"),
1611 MapData* d = getOrCreateDataForKey((void*) model);
1613 d->setLabel(model->getStringValue("name", "<>"));
1614 d->setPriority(speedKts > 2 ? 30 : 10); // low priority for slow moving ships
1615 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1619 SGVec2d MapWidget::project(const SGGeod& geod) const
1622 double r = earth_radius_lat(geod.getLatitudeRad());
1624 if (_orthoAzimuthProject) {
1625 // http://mathworld.wolfram.com/OrthographicProjection.html
1626 double cosTheta = cos(geod.getLatitudeRad());
1627 double sinDLambda = sin(geod.getLongitudeRad() - _projectionCenter.getLongitudeRad());
1628 double cosDLambda = cos(geod.getLongitudeRad() - _projectionCenter.getLongitudeRad());
1629 double sinTheta1 = sin(_projectionCenter.getLatitudeRad());
1630 double sinTheta = sin(geod.getLatitudeRad());
1631 double cosTheta1 = cos(_projectionCenter.getLatitudeRad());
1633 p = SGVec2d(cosTheta * sinDLambda,
1634 (cosTheta1 * sinTheta) - (sinTheta1 * cosTheta * cosDLambda)) * r * currentScale();
1637 // Sanson-Flamsteed projection, relative to the projection center
1638 double lonDiff = geod.getLongitudeRad() - _projectionCenter.getLongitudeRad(),
1639 latDiff = geod.getLatitudeRad() - _projectionCenter.getLatitudeRad();
1641 p = SGVec2d(cos(geod.getLatitudeRad()) * lonDiff, latDiff) * r * currentScale();
1645 // rotate as necessary
1646 double cost = cos(_upHeading * SG_DEGREES_TO_RADIANS),
1647 sint = sin(_upHeading * SG_DEGREES_TO_RADIANS);
1648 double rx = cost * p.x() - sint * p.y();
1649 double ry = sint * p.x() + cost * p.y();
1650 return SGVec2d(rx, ry);
1653 SGGeod MapWidget::unproject(const SGVec2d& p) const
1655 // unrotate, if necessary
1656 double cost = cos(-_upHeading * SG_DEGREES_TO_RADIANS),
1657 sint = sin(-_upHeading * SG_DEGREES_TO_RADIANS);
1658 SGVec2d ur(cost * p.x() - sint * p.y(),
1659 sint * p.x() + cost * p.y());
1661 double r = earth_radius_lat(_projectionCenter.getLatitudeRad());
1662 SGVec2d unscaled = ur * (1.0 / (currentScale() * r));
1664 if (_orthoAzimuthProject) {
1665 double phi = length(p);
1666 double c = asin(phi);
1667 double sinTheta1 = sin(_projectionCenter.getLatitudeRad());
1668 double cosTheta1 = cos(_projectionCenter.getLatitudeRad());
1670 double lat = asin(cos(c) * sinTheta1 + ((unscaled.y() * sin(c) * cosTheta1) / phi));
1671 double lon = _projectionCenter.getLongitudeRad() +
1672 atan((unscaled.x()* sin(c)) / (phi * cosTheta1 * cos(c) - unscaled.y() * sinTheta1 * sin(c)));
1673 return SGGeod::fromRad(lon, lat);
1675 double lat = unscaled.y() + _projectionCenter.getLatitudeRad();
1676 double lon = (unscaled.x() / cos(lat)) + _projectionCenter.getLongitudeRad();
1677 return SGGeod::fromRad(lon, lat);
1681 double MapWidget::currentScale() const
1683 return 1.0 / pow(2.0, _cachedZoom);
1686 void MapWidget::circleAt(const SGVec2d& center, int nSides, double r)
1688 glBegin(GL_LINE_LOOP);
1689 double advance = (SGD_PI * 2) / nSides;
1690 glVertex2d(center.x() +r, center.y());
1692 for (int i=1; i<nSides; ++i) {
1693 glVertex2d(center.x() + (cos(t) * r), center.y() + (sin(t) * r));
1699 void MapWidget::squareAt(const SGVec2d& center, double r)
1701 glBegin(GL_LINE_LOOP);
1702 glVertex2d(center.x() + r, center.y() + r);
1703 glVertex2d(center.x() + r, center.y() - r);
1704 glVertex2d(center.x() - r, center.y() - r);
1705 glVertex2d(center.x() - r, center.y() + r);
1709 void MapWidget::circleAtAlt(const SGVec2d& center, int nSides, double r, double r2)
1711 glBegin(GL_LINE_LOOP);
1712 double advance = (SGD_PI * 2) / nSides;
1713 glVertex2d(center.x(), center.y() + r);
1715 for (int i=1; i<nSides; ++i) {
1716 double rr = (i%2 == 0) ? r : r2;
1717 glVertex2d(center.x() + (sin(t) * rr), center.y() + (cos(t) * rr));
1723 void MapWidget::drawLine(const SGVec2d& p1, const SGVec2d& p2)
1726 glVertex2dv(p1.data());
1727 glVertex2dv(p2.data());
1731 void MapWidget::drawLegendBox(const SGVec2d& pos, const std::string& t)
1733 std::vector<std::string> lines(simgear::strutils::split(t, "\n"));
1734 const int LINE_LEADING = 4;
1735 const int MARGIN = 4;
1738 int maxWidth = -1, totalHeight = 0;
1739 int lineHeight = legendFont.getStringHeight();
1741 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1742 totalHeight += lineHeight;
1744 totalHeight += LINE_LEADING;
1747 int lw = legendFont.getStringWidth(lines[ln].c_str());
1748 maxWidth = std::max(maxWidth, lw);
1749 } // of line measurement
1752 return; // all lines are empty, don't draw
1755 totalHeight += MARGIN * 2;
1760 box.min[1] = -totalHeight;
1761 box.max[0] = maxWidth + (MARGIN * 2);
1764 box.draw (pos.x(), pos.y(), PUSTYLE_DROPSHADOW, colour, FALSE, border);
1767 int xPos = pos.x() + MARGIN;
1768 int yPos = pos.y() - (lineHeight + MARGIN);
1769 glColor3f(0.8, 0.8, 0.8);
1771 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1772 legendFont.drawString(lines[ln].c_str(), xPos, yPos);
1773 yPos -= lineHeight + LINE_LEADING;
1777 void MapWidget::drawData()
1779 std::sort(_dataQueue.begin(), _dataQueue.end(), MapData::order);
1781 int hw = _width >> 1,
1783 puBox visBox(makePuBox(-hw, -hh, _width, _height));
1787 std::vector<MapData*> drawQueue;
1789 bool drawData = _root->getBoolValue("draw-data");
1790 const int MAX_DRAW_DATA = 25;
1791 const int MAX_DRAW = 50;
1793 for (; (d < _dataQueue.size()) && (drawn < MAX_DRAW); ++d) {
1794 MapData* md = _dataQueue[d];
1795 md->setDataVisible(drawData);
1797 if (md->isClipped(visBox)) {
1801 if (md->overlaps(drawQueue)) {
1802 if (drawData) { // overlapped with data, let's try just the label
1803 md->setDataVisible(false);
1804 if (md->overlaps(drawQueue)) {
1810 } // of overlaps case
1812 drawQueue.push_back(md);
1814 if (drawData && (drawn >= MAX_DRAW_DATA)) {
1819 // draw lowest-priority first, so higher-priorty items appear on top
1820 std::vector<MapData*>::reverse_iterator r;
1821 for (r = drawQueue.rbegin(); r!= drawQueue.rend(); ++r) {
1826 KeyDataMap::iterator it = _mapData.begin();
1827 for (; it != _mapData.end(); ) {
1829 if (it->second->isExpired()) {
1831 KeyDataMap::iterator cur = it++;
1832 _mapData.erase(cur);
1836 } // of expiry iteration
1839 bool MapWidget::validDataForKey(void* key)
1841 KeyDataMap::iterator it = _mapData.find(key);
1842 if (it == _mapData.end()) {
1843 return false; // no valid data for the key!
1846 it->second->resetAge(); // mark data as valid this frame
1847 _dataQueue.push_back(it->second);
1851 void MapWidget::setAnchorForKey(void* key, const SGVec2d& anchor)
1853 KeyDataMap::iterator it = _mapData.find(key);
1854 if (it == _mapData.end()) {
1855 throw sg_exception("no valid data for key!");
1858 it->second->setAnchor(anchor);
1861 MapData* MapWidget::getOrCreateDataForKey(void* key)
1863 KeyDataMap::iterator it = _mapData.find(key);
1864 if (it == _mapData.end()) {
1865 return createDataForKey(key);
1868 it->second->resetAge(); // mark data as valid this frame
1869 _dataQueue.push_back(it->second);
1873 MapData* MapWidget::createDataForKey(void* key)
1875 KeyDataMap::iterator it = _mapData.find(key);
1876 if (it != _mapData.end()) {
1877 throw sg_exception("duplicate data requested for key!");
1880 MapData* d = new MapData(0);
1882 _dataQueue.push_back(d);
1887 void MapWidget::clearData()
1889 KeyDataMap::iterator it = _mapData.begin();
1890 for (; it != _mapData.end(); ++it) {
1897 int MapWidget::displayHeading(double h) const
1899 if (_magneticHeadings) {
1900 h -= _magVar->get_magvar() * SG_RADIANS_TO_DEGREES;
1903 SG_NORMALIZE_RANGE(h, 0.0, 360.0);
1904 return SGMiscd::roundToInt(h);