5 #include "MapWidget.hxx"
8 #include <algorithm> // for std::sort
9 #include <plib/puAux.h>
11 #include <simgear/sg_inlines.h>
12 #include <simgear/route/waypoint.hxx>
13 #include <simgear/sg_inlines.h>
14 #include <simgear/misc/strutils.hxx>
15 #include <simgear/magvar/magvar.hxx>
16 #include <simgear/timing/sg_time.hxx> // for magVar julianDate
17 #include <simgear/structure/exception.hxx>
19 #include <Main/globals.hxx>
20 #include <Main/fg_props.hxx>
21 #include <Autopilot/route_mgr.hxx>
22 #include <Navaids/positioned.hxx>
23 #include <Navaids/navrecord.hxx>
24 #include <Navaids/navlist.hxx>
25 #include <Navaids/fix.hxx>
26 #include <Airports/simple.hxx>
27 #include <Airports/runways.hxx>
28 #include <Main/fg_os.hxx> // fgGetKeyModifiers()
29 #include <Navaids/routePath.hxx>
31 const char* RULER_LEGEND_KEY = "ruler-legend";
33 /* equatorial and polar earth radius */
34 const float rec = 6378137; // earth radius, equator (?)
35 const float rpol = 6356752.314f; // earth radius, polar (?)
37 /************************************************************************
38 some trigonometric helper functions
39 (translated more or less directly from Alexei Novikovs perl original)
40 *************************************************************************/
42 //Returns Earth radius at a given latitude (Ellipsoide equation with two equal axis)
43 static float earth_radius_lat( float lat )
45 double a = cos(lat)/rec;
46 double b = sin(lat)/rpol;
47 return 1.0f / sqrt( a * a + b * b );
50 ///////////////////////////////////////////////////////////////////////////
52 static puBox makePuBox(int x, int y, int w, int h)
62 static bool puBoxIntersect(const puBox& a, const puBox& b)
64 int x0 = SG_MAX2(a.min[0], b.min[0]);
65 int y0 = SG_MAX2(a.min[1], b.min[1]);
66 int x1 = SG_MIN2(a.max[0], b.max[0]);
67 int y1 = SG_MIN2(a.max[1], b.max[1]);
69 return (x0 <= x1) && (y0 <= y1);
73 typedef std::vector<MapData*> MapDataVec;
78 static const int HALIGN_LEFT = 1;
79 static const int HALIGN_CENTER = 2;
80 static const int HALIGN_RIGHT = 3;
82 static const int VALIGN_TOP = 1 << 4;
83 static const int VALIGN_CENTER = 2 << 4;
84 static const int VALIGN_BOTTOM = 3 << 4;
86 MapData(int priority) :
92 _offsetDir(HALIGN_LEFT | VALIGN_CENTER),
98 void setLabel(const std::string& label)
100 if (label == _label) {
101 return; // common case, and saves invalidation
108 void setText(const std::string &text)
110 if (_rawText == text) {
111 return; // common case, and saves invalidation
118 void setDataVisible(bool vis) {
119 if (vis == _dataVisible) {
123 if (_rawText.empty()) {
131 static void setFont(puFont f)
134 _fontHeight = f.getStringHeight();
135 _fontDescender = f.getStringDescender();
138 static void setPalette(puColor* pal)
143 void setPriority(int pri)
149 { return _priority; }
151 void setAnchor(const SGVec2d& anchor)
156 void setOffset(int direction, int px)
158 if ((_offsetPx == px) && (_offsetDir == direction)) {
163 _offsetDir = direction;
167 bool isClipped(const puBox& vis) const
170 if ((_width < 1) || (_height < 1)) {
174 return !puBoxIntersect(vis, box());
177 bool overlaps(const MapDataVec& l) const
182 MapDataVec::const_iterator it;
183 for (it = l.begin(); it != l.end(); ++it) {
184 if (puBoxIntersect(b, (*it)->box())) {
187 } // of list iteration
196 _anchor.x() + _offset.x(),
197 _anchor.y() + _offset.y(),
205 int xx = _anchor.x() + _offset.x();
206 int yy = _anchor.y() + _offset.y();
209 puBox box(makePuBox(0,0,_width, _height));
211 box.draw(xx, yy, PUSTYLE_DROPSHADOW, _palette, FALSE, border);
214 int lineHeight = _fontHeight;
215 int xPos = xx + MARGIN;
216 int yPos = yy + _height - (lineHeight + MARGIN);
217 glColor3f(0.8, 0.8, 0.8);
219 for (unsigned int ln=0; ln<_lines.size(); ++ln) {
220 _font.drawString(_lines[ln].c_str(), xPos, yPos);
221 yPos -= lineHeight + LINE_LEADING;
224 glColor3f(0.8, 0.8, 0.8);
225 _font.drawString(_label.c_str(), xx, yy + _fontDescender);
239 bool isExpired() const
240 { return (_age > 100); }
242 static bool order(MapData* a, MapData* b)
244 return a->_priority > b->_priority;
247 void validate() const
267 void measureData() const
269 _lines = simgear::strutils::split(_rawText, "\n");
270 // measure text to find width and height
274 for (unsigned int ln=0; ln<_lines.size(); ++ln) {
275 _height += _fontHeight;
277 _height += LINE_LEADING;
280 int lw = _font.getStringWidth(_lines[ln].c_str());
281 _width = std::max(_width, lw);
282 } // of line measurement
284 if ((_width < 1) || (_height < 1)) {
289 _height += MARGIN * 2;
290 _width += MARGIN * 2;
293 void measureLabel() const
295 if (_label.empty()) {
296 _width = _height = -1;
300 _height = _fontHeight;
301 _width = _font.getStringWidth(_label.c_str());
304 void computeOffset() const
306 _dirtyOffset = false;
307 if ((_width <= 0) || (_height <= 0)) {
314 switch (_offsetDir & 0x0f) {
321 hOffset = -(_width>>1);
325 hOffset = -(_offsetPx + _width);
329 switch (_offsetDir & 0xf0) {
332 vOffset = -(_offsetPx + _height);
336 vOffset = -(_height>>1);
344 _offset = SGVec2d(hOffset, vOffset);
347 static const int LINE_LEADING = 3;
348 static const int MARGIN = 3;
350 mutable bool _dirtyText;
351 mutable bool _dirtyOffset;
353 std::string _rawText;
355 mutable std::vector<std::string> _lines;
357 mutable int _width, _height;
361 mutable SGVec2d _offset;
365 static puColor* _palette;
366 static int _fontHeight;
367 static int _fontDescender;
370 puFont MapData::_font;
371 puColor* MapData::_palette;
372 int MapData::_fontHeight = 0;
373 int MapData::_fontDescender = 0;
375 ///////////////////////////////////////////////////////////////////////////
377 const int MAX_ZOOM = 12;
378 const int SHOW_DETAIL_ZOOM = 8;
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");
391 MapData::setFont(legendFont);
392 MapData::setPalette(colour);
394 _magVar = new SGMagVar();
397 MapWidget::~MapWidget()
403 void MapWidget::setProperty(SGPropertyNode_ptr prop)
406 int zoom = _root->getIntValue("zoom", -1);
408 _root->setIntValue("zoom", 6); // default zoom
411 // expose MAX_ZOOM to the UI
412 _root->setIntValue("max-zoom", MAX_ZOOM);
413 _root->setBoolValue("centre-on-aircraft", true);
414 _root->setBoolValue("draw-data", false);
415 _root->setBoolValue("magnetic-headings", true);
418 void MapWidget::setSize(int w, int h)
420 puObject::setSize(w, h);
427 void MapWidget::doHit( int button, int updown, int x, int y )
429 puObject::doHit(button, updown, x, y);
430 if (updown == PU_DRAG) {
435 if (button == 3) { // mouse-wheel up
437 } else if (button == 4) { // mouse-wheel down
441 if (button != active_mouse_button) {
445 _hitLocation = SGVec2d(x - abox.min[0], y - abox.min[1]);
447 if (updown == PU_UP) {
448 puDeactivateWidget();
449 } else if (updown == PU_DOWN) {
450 puSetActiveWidget(this, x, y);
452 if (fgGetKeyModifiers() & KEYMOD_CTRL) {
453 _clickGeod = unproject(_hitLocation - SGVec2d(_width>>1, _height>>1));
458 void MapWidget::handlePan(int x, int y)
460 SGVec2d delta = SGVec2d(x, y) - _hitLocation;
462 _hitLocation = SGVec2d(x,y);
465 int MapWidget::checkKey (int key, int updown )
467 if ((updown == PU_UP) || !isVisible () || !isActive () || (window != puGetWindow())) {
475 pan(SGVec2d(0, -CURSOR_PAN_STEP));
479 pan(SGVec2d(0, CURSOR_PAN_STEP));
483 pan(SGVec2d(CURSOR_PAN_STEP, 0));
487 pan(SGVec2d(-CURSOR_PAN_STEP, 0));
506 void MapWidget::pan(const SGVec2d& delta)
509 _projectionCenter = unproject(-delta);
512 int MapWidget::zoom() const
514 int z = _root->getIntValue("zoom");
515 SG_CLAMP_RANGE(z, 0, MAX_ZOOM);
519 void MapWidget::zoomIn()
521 if (zoom() >= MAX_ZOOM) {
525 _root->setIntValue("zoom", zoom() + 1);
528 void MapWidget::zoomOut()
534 _root->setIntValue("zoom", zoom() - 1);
537 void MapWidget::draw(int dx, int dy)
539 _aircraft = SGGeod::fromDeg(fgGetDouble("/position/longitude-deg"),
540 fgGetDouble("/position/latitude-deg"));
542 bool mag = _root->getBoolValue("magnetic-headings");
543 if (mag != _magneticHeadings) {
544 clearData(); // flush cached data text, since it often includes heading
545 _magneticHeadings = mag;
549 _root->setBoolValue("centre-on-aircraft", false);
552 else if (_root->getBoolValue("centre-on-aircraft")) {
553 _projectionCenter = _aircraft;
556 double julianDate = globals->get_time_params()->getJD();
557 _magVar->update(_projectionCenter, julianDate);
559 bool aircraftUp = _root->getBoolValue("aircraft-heading-up");
561 _upHeading = fgGetDouble("/orientation/heading-deg");
566 _cachedZoom = MAX_ZOOM - zoom();
567 SGGeod topLeft = unproject(SGVec2d(_width/2, _height/2));
568 // compute draw range, including a fudge factor for ILSs and other 'long'
570 _drawRangeNm = SGGeodesy::distanceNm(_projectionCenter, topLeft) + 10.0;
572 // drawing operations
573 GLint sx = (int) abox.min[0],
574 sy = (int) abox.min[1];
575 glScissor(dx + sx, dy + sy, _width, _height);
576 glEnable(GL_SCISSOR_TEST);
578 glMatrixMode(GL_MODELVIEW);
580 // cetere drawing about the widget center (which is also the
581 // projection centre)
582 glTranslated(dx + sx + (_width/2), dy + sy + (_height/2), 0.0);
587 int textHeight = legendFont.getStringHeight() + 5;
590 SGVec2d loc = project(_aircraft);
591 glColor3f(1.0, 1.0, 1.0);
592 drawLine(loc, SGVec2d(loc.x(), (_height / 2) - textHeight));
595 if (_magneticHeadings) {
596 displayHdg = (int) fgGetDouble("/orientation/heading-magnetic-deg");
598 displayHdg = (int) _upHeading;
601 double y = (_height / 2) - textHeight;
603 ::snprintf(buf, 16, "%d", displayHdg);
604 int sw = legendFont.getStringWidth(buf);
605 legendFont.drawString(buf, loc.x() - sw/2, y);
612 drawNavRadio(fgGetNode("/instrumentation/nav[0]", false));
613 drawNavRadio(fgGetNode("/instrumentation/nav[1]", false));
614 paintAircraftLocation(_aircraft);
621 glDisable(GL_SCISSOR_TEST);
624 void MapWidget::paintRuler()
626 if (_clickGeod == SGGeod()) {
630 SGVec2d acftPos = project(_aircraft);
631 SGVec2d clickPos = project(_clickGeod);
633 glColor4f(0.0, 1.0, 1.0, 0.6);
634 drawLine(acftPos, clickPos);
636 circleAtAlt(clickPos, 8, 10, 5);
638 double dist, az, az2;
639 SGGeodesy::inverse(_aircraft, _clickGeod, az, az2, dist);
641 ::snprintf(buffer, 1024, "%03d/%.1fnm",
642 displayHeading(az), dist * SG_METER_TO_NM);
644 MapData* d = getOrCreateDataForKey((void*) RULER_LEGEND_KEY);
646 d->setAnchor(clickPos);
647 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
648 d->setPriority(20000);
653 void MapWidget::paintAircraftLocation(const SGGeod& aircraftPos)
655 SGVec2d loc = project(aircraftPos);
657 double hdg = fgGetDouble("/orientation/heading-deg");
660 glColor4f(1.0, 1.0, 0.0, 1.0);
662 glTranslated(loc.x(), loc.y(), 0.0);
663 glRotatef(hdg - _upHeading, 0.0, 0.0, -1.0);
665 const SGVec2d wingspan(12, 0);
666 const SGVec2d nose(0, 8);
667 const SGVec2d tail(0, -14);
668 const SGVec2d tailspan(4,0);
670 drawLine(-wingspan, wingspan);
671 drawLine(nose, tail);
672 drawLine(tail - tailspan, tail + tailspan);
678 void MapWidget::paintRoute()
680 if (_route->numWaypts() < 2) {
684 RoutePath path(_route->waypts());
686 // first pass, draw the actual lines
689 for (int w=0; w<_route->numWaypts(); ++w) {
690 SGGeodVec gv(path.pathForIndex(w));
695 if (w < _route->currentIndex()) {
696 glColor4f(0.5, 0.5, 0.5, 0.7);
698 glColor4f(1.0, 0.0, 1.0, 1.0);
701 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
702 if (wpt->flag(flightgear::WPT_MISS)) {
703 glEnable(GL_LINE_STIPPLE);
704 glLineStipple(1, 0x00FF);
707 glBegin(GL_LINE_STRIP);
708 for (unsigned int i=0; i<gv.size(); ++i) {
709 SGVec2d p = project(gv[i]);
710 glVertex2d(p.x(), p.y());
714 glDisable(GL_LINE_STIPPLE);
718 // second pass, draw waypoint symbols and data
719 for (int w=0; w < _route->numWaypts(); ++w) {
720 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
721 SGGeod g = path.positionForIndex(w);
723 continue; // Vectors or similar
726 SGVec2d p = project(g);
727 glColor4f(1.0, 0.0, 1.0, 1.0);
728 circleAtAlt(p, 8, 12, 5);
730 std::ostringstream legend;
731 legend << wpt->ident();
732 if (wpt->altitudeRestriction() != flightgear::RESTRICT_NONE) {
733 legend << '\n' << SGMiscd::roundToInt(wpt->altitudeFt()) << '\'';
736 if (wpt->speedRestriction() == flightgear::SPEED_RESTRICT_MACH) {
737 legend << '\n' << wpt->speedMach() << "M";
738 } else if (wpt->speedRestriction() != flightgear::RESTRICT_NONE) {
739 legend << '\n' << SGMiscd::roundToInt(wpt->speedKts()) << "Kts";
742 MapData* d = getOrCreateDataForKey(reinterpret_cast<void*>(w * 2));
743 d->setText(legend.str());
744 d->setLabel(wpt->ident());
746 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
747 d->setPriority(w < _route->currentIndex() ? 9000 : 12000);
749 } // of second waypoint iteration
753 * Round a SGGeod to an arbitrary precision.
754 * For example, passing precision of 0.5 will round to the nearest 0.5 of
755 * a degree in both lat and lon - passing in 3.0 rounds to the nearest 3 degree
756 * multiple, and so on.
758 static SGGeod roundGeod(double precision, const SGGeod& g)
760 double lon = SGMiscd::round(g.getLongitudeDeg() / precision);
761 double lat = SGMiscd::round(g.getLatitudeDeg() / precision);
763 return SGGeod::fromDeg(lon * precision, lat * precision);
766 bool MapWidget::drawLineClipped(const SGVec2d& a, const SGVec2d& b)
768 double minX = SGMiscd::min(a.x(), b.x()),
769 minY = SGMiscd::min(a.y(), b.y()),
770 maxX = SGMiscd::max(a.x(), b.x()),
771 maxY = SGMiscd::max(a.y(), b.y());
773 int hh = _height >> 1, hw = _width >> 1;
775 if ((maxX < -hw) || (minX > hw) || (minY > hh) || (maxY < -hh)) {
779 glVertex2dv(a.data());
780 glVertex2dv(b.data());
784 SGVec2d MapWidget::gridPoint(int ix, int iy)
786 int key = (ix + 0x7fff) | ((iy + 0x7fff) << 16);
787 GridPointCache::iterator it = _gridCache.find(key);
788 if (it != _gridCache.end()) {
792 SGGeod gp = SGGeod::fromDeg(
793 _gridCenter.getLongitudeDeg() + ix * _gridSpacing,
794 _gridCenter.getLatitudeDeg() + iy * _gridSpacing);
796 SGVec2d proj = project(gp);
797 _gridCache[key] = proj;
801 void MapWidget::drawLatLonGrid()
804 _gridCenter = roundGeod(_gridSpacing, _projectionCenter);
810 glColor4f(0.8, 0.8, 0.8, 0.4);
818 for (int x = -ix; x < ix; ++x) {
819 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x+1, -iy));
820 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x+1, iy));
821 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x, -iy + 1));
822 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x, iy - 1));
826 for (int y = -iy; y < iy; ++y) {
827 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix, y+1));
828 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix + 1, y));
829 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix, y+1));
830 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix - 1, y));
841 void MapWidget::drawGPSData()
843 std::string gpsMode = _gps->getStringValue("mode");
845 SGGeod wp0Geod = SGGeod::fromDeg(
846 _gps->getDoubleValue("wp/wp[0]/longitude-deg"),
847 _gps->getDoubleValue("wp/wp[0]/latitude-deg"));
849 SGGeod wp1Geod = SGGeod::fromDeg(
850 _gps->getDoubleValue("wp/wp[1]/longitude-deg"),
851 _gps->getDoubleValue("wp/wp[1]/latitude-deg"));
854 double gpsTrackDeg = _gps->getDoubleValue("indicated-track-true-deg");
855 double gpsSpeed = _gps->getDoubleValue("indicated-ground-speed-kt");
858 if (gpsSpeed > 3.0) { // only draw track line if valid
860 SGGeodesy::direct(_aircraft, gpsTrackDeg, _drawRangeNm * SG_NM_TO_METER, trackRadial, az2);
862 glColor4f(1.0, 1.0, 0.0, 1.0);
863 glEnable(GL_LINE_STIPPLE);
864 glLineStipple(1, 0x00FF);
865 drawLine(project(_aircraft), project(trackRadial));
866 glDisable(GL_LINE_STIPPLE);
869 if (gpsMode == "dto") {
870 SGVec2d wp0Pos = project(wp0Geod);
871 SGVec2d wp1Pos = project(wp1Geod);
873 glColor4f(1.0, 0.0, 1.0, 1.0);
874 drawLine(wp0Pos, wp1Pos);
878 if (_gps->getBoolValue("scratch/valid")) {
884 class MapAirportFilter : public FGAirport::AirportFilter
887 MapAirportFilter(SGPropertyNode_ptr nd)
889 _heliports = nd->getBoolValue("show-heliports", false);
890 _hardRunwaysOnly = nd->getBoolValue("hard-surfaced-airports", true);
891 _minLengthFt = nd->getDoubleValue("min-runway-length-ft", 2000.0);
894 virtual FGPositioned::Type maxType() const {
895 return _heliports ? FGPositioned::HELIPORT : FGPositioned::AIRPORT;
898 virtual bool passAirport(FGAirport* aApt) const {
899 if (_hardRunwaysOnly) {
900 return aApt->hasHardRunwayOfLengthFt(_minLengthFt);
908 bool _hardRunwaysOnly;
912 void MapWidget::drawAirports()
914 MapAirportFilter af(_root);
915 FGPositioned::List apts = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &af);
916 for (unsigned int i=0; i<apts.size(); ++i) {
917 drawAirport((FGAirport*) apts[i].get());
921 class NavaidFilter : public FGPositioned::Filter
924 NavaidFilter(bool fixesEnabled, bool navaidsEnabled) :
925 _fixes(fixesEnabled),
926 _navaids(navaidsEnabled)
929 virtual bool pass(FGPositioned* aPos) const {
930 if (_fixes && (aPos->type() == FGPositioned::FIX)) {
931 // ignore fixes which end in digits - expirmental
932 if (aPos->ident().length() > 4 && isdigit(aPos->ident()[3]) && isdigit(aPos->ident()[4])) {
940 virtual FGPositioned::Type minType() const {
941 return _fixes ? FGPositioned::FIX : FGPositioned::VOR;
944 virtual FGPositioned::Type maxType() const {
945 return _navaids ? FGPositioned::NDB : FGPositioned::FIX;
949 bool _fixes, _navaids;
952 void MapWidget::drawNavaids()
954 bool fixes = _root->getBoolValue("draw-fixes");
955 NavaidFilter f(fixes, _root->getBoolValue("draw-navaids"));
957 if (f.minType() <= f.maxType()) {
958 FGPositioned::List navs = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &f);
961 for (unsigned int i=0; i<navs.size(); ++i) {
962 FGPositioned::Type ty = navs[i]->type();
963 if (ty == FGPositioned::NDB) {
964 drawNDB(false, (FGNavRecord*) navs[i].get());
965 } else if (ty == FGPositioned::VOR) {
966 drawVOR(false, (FGNavRecord*) navs[i].get());
967 } else if (ty == FGPositioned::FIX) {
968 drawFix((FGFix*) navs[i].get());
970 } // of navaid iteration
971 } // of navaids || fixes are drawn test
974 void MapWidget::drawNDB(bool tuned, FGNavRecord* ndb)
976 SGVec2d pos = project(ndb->geod());
979 glColor3f(0.0, 1.0, 1.0);
981 glColor3f(0.0, 0.0, 0.0);
984 glEnable(GL_LINE_STIPPLE);
985 glLineStipple(1, 0x00FF);
986 circleAt(pos, 20, 6);
987 circleAt(pos, 20, 10);
988 glDisable(GL_LINE_STIPPLE);
990 if (validDataForKey(ndb)) {
991 setAnchorForKey(ndb, pos);
996 ::snprintf(buffer, 1024, "%s\n%s %3.0fKhz",
997 ndb->name().c_str(), ndb->ident().c_str(),ndb->get_freq()/100.0);
999 MapData* d = createDataForKey(ndb);
1001 d->setLabel(ndb->ident());
1003 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1008 void MapWidget::drawVOR(bool tuned, FGNavRecord* vor)
1010 SGVec2d pos = project(vor->geod());
1012 glColor3f(0.0, 1.0, 1.0);
1014 glColor3f(0.0, 0.0, 1.0);
1017 circleAt(pos, 6, 8);
1019 if (validDataForKey(vor)) {
1020 setAnchorForKey(vor, pos);
1025 ::snprintf(buffer, 1024, "%s\n%s %6.3fMhz",
1026 vor->name().c_str(), vor->ident().c_str(),
1027 vor->get_freq() / 100.0);
1029 MapData* d = createDataForKey(vor);
1031 d->setLabel(vor->ident());
1032 d->setPriority(tuned ? 10000 : 100);
1033 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1037 void MapWidget::drawFix(FGFix* fix)
1039 SGVec2d pos = project(fix->geod());
1040 glColor3f(0.0, 0.0, 0.0);
1041 circleAt(pos, 3, 6);
1043 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1044 return; // hide fix labels beyond a certain zoom level
1047 if (validDataForKey(fix)) {
1048 setAnchorForKey(fix, pos);
1052 MapData* d = createDataForKey(fix);
1053 d->setLabel(fix->ident());
1055 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1059 void MapWidget::drawNavRadio(SGPropertyNode_ptr radio)
1061 if (!radio || radio->getBoolValue("slaved-to-gps", false)
1062 || !radio->getBoolValue("in-range", false)) {
1066 if (radio->getBoolValue("nav-loc", false)) {
1067 drawTunedLocalizer(radio);
1070 // identify the tuned station - unfortunately we don't get lat/lon directly,
1071 // need to do the frequency search again
1072 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1073 FGNavRecord* nav = globals->get_navlist()->findByFreq(mhz, _aircraft);
1074 if (!nav || (nav->ident() != radio->getStringValue("nav-id"))) {
1075 // mismatch between navradio selection logic and ours!
1082 SGVec2d pos = project(nav->geod());
1085 double trueRadial = radio->getDoubleValue("radials/target-radial-deg");
1086 SGGeodesy::direct(nav->geod(), trueRadial, nav->get_range() * SG_NM_TO_METER, range, az2);
1087 SGVec2d prange = project(range);
1089 SGVec2d norm = normalize(prange - pos);
1090 SGVec2d perp(norm.y(), -norm.x());
1092 circleAt(pos, 64, length(prange - pos));
1093 drawLine(pos, prange);
1095 // draw to/from arrows
1096 SGVec2d midPoint = (pos + prange) * 0.5;
1097 if (radio->getBoolValue("from-flag")) {
1103 SGVec2d arrowB = midPoint - (norm * sz) + (perp * sz);
1104 SGVec2d arrowC = midPoint - (norm * sz) - (perp * sz);
1105 drawLine(midPoint, arrowB);
1106 drawLine(arrowB, arrowC);
1107 drawLine(arrowC, midPoint);
1109 drawLine(pos, (2 * pos) - prange); // reciprocal radial
1112 void MapWidget::drawTunedLocalizer(SGPropertyNode_ptr radio)
1114 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1115 FGNavRecord* loc = globals->get_loclist()->findByFreq(mhz, _aircraft);
1116 if (!loc || (loc->ident() != radio->getStringValue("nav-id"))) {
1117 // mismatch between navradio selection logic and ours!
1121 if (loc->runway()) {
1122 drawILS(true, loc->runway());
1127 void MapWidget::drawObstacle(FGPositioned* obs)
1129 SGVec2d pos = project(obs->geod());
1130 glColor3f(0.0, 0.0, 0.0);
1132 drawLine(pos, pos + SGVec2d());
1136 void MapWidget::drawAirport(FGAirport* apt)
1138 // draw tower location
1139 SGVec2d towerPos = project(apt->getTowerLocation());
1141 if (_cachedZoom <= SHOW_DETAIL_ZOOM) {
1142 glColor3f(1.0, 1.0, 1.0);
1145 drawLine(towerPos + SGVec2d(3, 0), towerPos + SGVec2d(3, 10));
1146 drawLine(towerPos + SGVec2d(-3, 0), towerPos + SGVec2d(-3, 10));
1147 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(-3, 10));
1148 drawLine(towerPos + SGVec2d(6, 20), towerPos + SGVec2d(3, 10));
1149 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(6, 20));
1152 if (validDataForKey(apt)) {
1153 setAnchorForKey(apt, towerPos);
1156 ::snprintf(buffer, 1024, "%s\n%s",
1157 apt->ident().c_str(), apt->name().c_str());
1159 MapData* d = createDataForKey(apt);
1161 d->setLabel(apt->ident());
1162 d->setPriority(100 + scoreAirportRunways(apt));
1163 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 6);
1164 d->setAnchor(towerPos);
1167 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1171 for (unsigned int r=0; r<apt->numRunways(); ++r) {
1172 FGRunway* rwy = apt->getRunwayByIndex(r);
1173 if (!rwy->isReciprocal()) {
1178 for (unsigned int r=0; r<apt->numRunways(); ++r) {
1179 FGRunway* rwy = apt->getRunwayByIndex(r);
1180 if (!rwy->isReciprocal()) {
1185 drawILS(false, rwy);
1187 } // of runway iteration
1191 int MapWidget::scoreAirportRunways(FGAirport* apt)
1193 bool needHardSurface = _root->getBoolValue("hard-surfaced-airports", true);
1194 double minLength = _root->getDoubleValue("min-runway-length-ft", 2000.0);
1197 unsigned int numRunways(apt->numRunways());
1198 for (unsigned int r=0; r<numRunways; ++r) {
1199 FGRunway* rwy = apt->getRunwayByIndex(r);
1200 if (rwy->isReciprocal()) {
1204 if (needHardSurface && !rwy->isHardSurface()) {
1208 if (rwy->lengthFt() < minLength) {
1212 int scoreLength = SGMiscd::roundToInt(rwy->lengthFt() / 200.0);
1213 score += scoreLength;
1214 } // of runways iteration
1219 void MapWidget::drawRunwayPre(FGRunway* rwy)
1221 SGVec2d p1 = project(rwy->begin());
1222 SGVec2d p2 = project(rwy->end());
1225 glColor3f(1.0, 0.0, 1.0);
1229 void MapWidget::drawRunway(FGRunway* rwy)
1232 // optionally show active, stopway, etc
1233 // in legend, show published heading and length
1234 // and threshold elevation
1236 SGVec2d p1 = project(rwy->begin());
1237 SGVec2d p2 = project(rwy->end());
1239 glColor3f(1.0, 1.0, 1.0);
1240 SGVec2d inset = normalize(p2 - p1) * 2;
1242 drawLine(p1 + inset, p2 - inset);
1244 if (validDataForKey(rwy)) {
1245 setAnchorForKey(rwy, (p1 + p2) * 0.5);
1250 ::snprintf(buffer, 1024, "%s/%s\n%03d/%03d\n%.0f'",
1251 rwy->ident().c_str(),
1252 rwy->reciprocalRunway()->ident().c_str(),
1253 displayHeading(rwy->headingDeg()),
1254 displayHeading(rwy->reciprocalRunway()->headingDeg()),
1257 MapData* d = createDataForKey(rwy);
1259 d->setLabel(rwy->ident() + "/" + rwy->reciprocalRunway()->ident());
1261 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1262 d->setAnchor((p1 + p2) * 0.5);
1265 void MapWidget::drawILS(bool tuned, FGRunway* rwy)
1267 // arrow, tip centered on the landing threshold
1268 // using LOC transmitter position would be more accurate, but
1269 // is visually cluttered
1270 // arrow width is based upon the computed localizer width
1272 FGNavRecord* loc = rwy->ILS();
1273 double halfBeamWidth = loc->localizerWidth() * 0.5;
1274 SGVec2d t = project(rwy->threshold());
1276 double rangeM = loc->get_range() * SG_NM_TO_METER;
1277 double radial = loc->get_multiuse();
1278 SG_NORMALIZE_RANGE(radial, 0.0, 360.0);
1281 // compute the three end points at the widge end of the arrow
1282 SGGeodesy::direct(loc->geod(), radial, -rangeM, locEnd, az2);
1283 SGVec2d endCentre = project(locEnd);
1285 SGGeodesy::direct(loc->geod(), radial + halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1286 SGVec2d endR = project(locEnd);
1288 SGGeodesy::direct(loc->geod(), radial - halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1289 SGVec2d endL = project(locEnd);
1291 // outline two triangles
1294 glColor3f(0.0, 1.0, 1.0);
1296 glColor3f(0.0, 0.0, 1.0);
1299 glBegin(GL_LINE_LOOP);
1300 glVertex2dv(t.data());
1301 glVertex2dv(endCentre.data());
1302 glVertex2dv(endL.data());
1304 glBegin(GL_LINE_LOOP);
1305 glVertex2dv(t.data());
1306 glVertex2dv(endCentre.data());
1307 glVertex2dv(endR.data());
1310 if (validDataForKey(loc)) {
1311 setAnchorForKey(loc, endR);
1316 ::snprintf(buffer, 1024, "%s\n%s\n%03d - %3.2fMHz",
1317 loc->ident().c_str(), loc->name().c_str(),
1318 displayHeading(radial),
1319 loc->get_freq()/100.0);
1321 MapData* d = createDataForKey(loc);
1323 d->setLabel(loc->ident());
1325 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1329 void MapWidget::drawTraffic()
1331 if (!_root->getBoolValue("draw-traffic")) {
1335 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1339 const SGPropertyNode* ai = fgGetNode("/ai/models", true);
1341 for (int i = 0; i < ai->nChildren(); ++i) {
1342 const SGPropertyNode *model = ai->getChild(i);
1343 // skip bad or dead entries
1344 if (!model || model->getIntValue("id", -1) == -1) {
1348 const std::string& name(model->getName());
1349 SGGeod pos = SGGeod::fromDegFt(
1350 model->getDoubleValue("position/longitude-deg"),
1351 model->getDoubleValue("position/latitude-deg"),
1352 model->getDoubleValue("position/altitude-ft"));
1354 double dist = SGGeodesy::distanceNm(_projectionCenter, pos);
1355 if (dist > _drawRangeNm) {
1359 double heading = model->getDoubleValue("orientation/true-heading-deg");
1360 if ((name == "aircraft") || (name == "multiplayer") ||
1361 (name == "wingman") || (name == "tanker")) {
1362 drawAIAircraft(model, pos, heading);
1363 } else if ((name == "ship") || (name == "carrier") || (name == "escort")) {
1364 drawAIShip(model, pos, heading);
1366 } // of ai/models iteration
1369 void MapWidget::drawAIAircraft(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1372 SGVec2d p = project(pos);
1374 glColor3f(0.0, 0.0, 0.0);
1376 circleAt(p, 4, 6.0); // black diamond
1378 // draw heading vector
1379 int speedKts = static_cast<int>(model->getDoubleValue("velocities/true-airspeed-kt"));
1383 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1384 double distanceM = speedKts * SG_NM_TO_METER * dt;
1388 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1390 drawLine(p, project(advance));
1394 // draw callsign / altitude / speed
1396 ::snprintf(buffer, 1024, "%s\n%d'\n%dkts",
1397 model->getStringValue("callsign", "<>"),
1398 static_cast<int>(pos.getElevationFt() / 50.0) * 50,
1401 MapData* d = getOrCreateDataForKey((void*) model);
1403 d->setLabel(model->getStringValue("callsign", "<>"));
1404 d->setPriority(speedKts > 5 ? 60 : 10); // low priority for parked aircraft
1405 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1410 void MapWidget::drawAIShip(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1412 SGVec2d p = project(pos);
1414 glColor3f(0.0, 0.0, 0.5);
1416 circleAt(p, 4, 6.0); // blue diamond (to differentiate from aircraft.
1418 // draw heading vector
1419 int speedKts = static_cast<int>(model->getDoubleValue("velocities/speed-kts"));
1423 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1424 double distanceM = speedKts * SG_NM_TO_METER * dt;
1428 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1430 drawLine(p, project(advance));
1433 // draw callsign / speed
1435 ::snprintf(buffer, 1024, "%s\n%dkts",
1436 model->getStringValue("name", "<>"),
1439 MapData* d = getOrCreateDataForKey((void*) model);
1441 d->setLabel(model->getStringValue("name", "<>"));
1442 d->setPriority(speedKts > 2 ? 30 : 10); // low priority for slow moving ships
1443 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1447 SGVec2d MapWidget::project(const SGGeod& geod) const
1449 // Sanson-Flamsteed projection, relative to the projection center
1450 double r = earth_radius_lat(geod.getLatitudeRad());
1451 double lonDiff = geod.getLongitudeRad() - _projectionCenter.getLongitudeRad(),
1452 latDiff = geod.getLatitudeRad() - _projectionCenter.getLatitudeRad();
1454 SGVec2d p = SGVec2d(cos(geod.getLatitudeRad()) * lonDiff, latDiff) * r * currentScale();
1456 // rotate as necessary
1457 double cost = cos(_upHeading * SG_DEGREES_TO_RADIANS),
1458 sint = sin(_upHeading * SG_DEGREES_TO_RADIANS);
1459 double rx = cost * p.x() - sint * p.y();
1460 double ry = sint * p.x() + cost * p.y();
1461 return SGVec2d(rx, ry);
1464 SGGeod MapWidget::unproject(const SGVec2d& p) const
1466 // unrotate, if necessary
1467 double cost = cos(-_upHeading * SG_DEGREES_TO_RADIANS),
1468 sint = sin(-_upHeading * SG_DEGREES_TO_RADIANS);
1469 SGVec2d ur(cost * p.x() - sint * p.y(),
1470 sint * p.x() + cost * p.y());
1472 double r = earth_radius_lat(_projectionCenter.getLatitudeRad());
1473 SGVec2d unscaled = ur * (1.0 / (currentScale() * r));
1475 double lat = unscaled.y() + _projectionCenter.getLatitudeRad();
1476 double lon = (unscaled.x() / cos(lat)) + _projectionCenter.getLongitudeRad();
1478 return SGGeod::fromRad(lon, lat);
1481 double MapWidget::currentScale() const
1483 return 1.0 / pow(2.0, _cachedZoom);
1486 void MapWidget::circleAt(const SGVec2d& center, int nSides, double r)
1488 glBegin(GL_LINE_LOOP);
1489 double advance = (SGD_PI * 2) / nSides;
1490 glVertex2d(center.x(), center.y() + r);
1492 for (int i=1; i<nSides; ++i) {
1493 glVertex2d(center.x() + (sin(t) * r), center.y() + (cos(t) * r));
1499 void MapWidget::circleAtAlt(const SGVec2d& center, int nSides, double r, double r2)
1501 glBegin(GL_LINE_LOOP);
1502 double advance = (SGD_PI * 2) / nSides;
1503 glVertex2d(center.x(), center.y() + r);
1505 for (int i=1; i<nSides; ++i) {
1506 double rr = (i%2 == 0) ? r : r2;
1507 glVertex2d(center.x() + (sin(t) * rr), center.y() + (cos(t) * rr));
1513 void MapWidget::drawLine(const SGVec2d& p1, const SGVec2d& p2)
1516 glVertex2dv(p1.data());
1517 glVertex2dv(p2.data());
1521 void MapWidget::drawLegendBox(const SGVec2d& pos, const std::string& t)
1523 std::vector<std::string> lines(simgear::strutils::split(t, "\n"));
1524 const int LINE_LEADING = 4;
1525 const int MARGIN = 4;
1528 int maxWidth = -1, totalHeight = 0;
1529 int lineHeight = legendFont.getStringHeight();
1531 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1532 totalHeight += lineHeight;
1534 totalHeight += LINE_LEADING;
1537 int lw = legendFont.getStringWidth(lines[ln].c_str());
1538 maxWidth = std::max(maxWidth, lw);
1539 } // of line measurement
1542 return; // all lines are empty, don't draw
1545 totalHeight += MARGIN * 2;
1550 box.min[1] = -totalHeight;
1551 box.max[0] = maxWidth + (MARGIN * 2);
1554 box.draw (pos.x(), pos.y(), PUSTYLE_DROPSHADOW, colour, FALSE, border);
1557 int xPos = pos.x() + MARGIN;
1558 int yPos = pos.y() - (lineHeight + MARGIN);
1559 glColor3f(0.8, 0.8, 0.8);
1561 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1562 legendFont.drawString(lines[ln].c_str(), xPos, yPos);
1563 yPos -= lineHeight + LINE_LEADING;
1567 void MapWidget::drawData()
1569 std::sort(_dataQueue.begin(), _dataQueue.end(), MapData::order);
1571 int hw = _width >> 1,
1573 puBox visBox(makePuBox(-hw, -hh, _width, _height));
1577 std::vector<MapData*> drawQueue;
1579 bool drawData = _root->getBoolValue("draw-data");
1580 const int MAX_DRAW_DATA = 25;
1581 const int MAX_DRAW = 50;
1583 for (; (d < _dataQueue.size()) && (drawn < MAX_DRAW); ++d) {
1584 MapData* md = _dataQueue[d];
1585 md->setDataVisible(drawData);
1587 if (md->isClipped(visBox)) {
1591 if (md->overlaps(drawQueue)) {
1592 if (drawData) { // overlapped with data, let's try just the label
1593 md->setDataVisible(false);
1594 if (md->overlaps(drawQueue)) {
1600 } // of overlaps case
1602 drawQueue.push_back(md);
1604 if (drawData && (drawn >= MAX_DRAW_DATA)) {
1609 // draw lowest-priority first, so higher-priorty items appear on top
1610 std::vector<MapData*>::reverse_iterator r;
1611 for (r = drawQueue.rbegin(); r!= drawQueue.rend(); ++r) {
1616 KeyDataMap::iterator it = _mapData.begin();
1617 for (; it != _mapData.end(); ) {
1619 if (it->second->isExpired()) {
1621 KeyDataMap::iterator cur = it++;
1622 _mapData.erase(cur);
1626 } // of expiry iteration
1629 bool MapWidget::validDataForKey(void* key)
1631 KeyDataMap::iterator it = _mapData.find(key);
1632 if (it == _mapData.end()) {
1633 return false; // no valid data for the key!
1636 it->second->resetAge(); // mark data as valid this frame
1637 _dataQueue.push_back(it->second);
1641 void MapWidget::setAnchorForKey(void* key, const SGVec2d& anchor)
1643 KeyDataMap::iterator it = _mapData.find(key);
1644 if (it == _mapData.end()) {
1645 throw sg_exception("no valid data for key!");
1648 it->second->setAnchor(anchor);
1651 MapData* MapWidget::getOrCreateDataForKey(void* key)
1653 KeyDataMap::iterator it = _mapData.find(key);
1654 if (it == _mapData.end()) {
1655 return createDataForKey(key);
1658 it->second->resetAge(); // mark data as valid this frame
1659 _dataQueue.push_back(it->second);
1663 MapData* MapWidget::createDataForKey(void* key)
1665 KeyDataMap::iterator it = _mapData.find(key);
1666 if (it != _mapData.end()) {
1667 throw sg_exception("duplicate data requested for key!");
1670 MapData* d = new MapData(0);
1672 _dataQueue.push_back(d);
1677 void MapWidget::clearData()
1679 KeyDataMap::iterator it = _mapData.begin();
1680 for (; it != _mapData.end(); ++it) {
1687 int MapWidget::displayHeading(double h) const
1689 if (_magneticHeadings) {
1690 h -= _magVar->get_magvar() * SG_RADIANS_TO_DEGREES;
1693 SG_NORMALIZE_RANGE(h, 0.0, 360.0);
1694 return SGMiscd::roundToInt(h);