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/simple.hxx>
25 #include <Airports/runways.hxx>
26 #include <Main/fg_os.hxx> // fgGetKeyModifiers()
27 #include <Navaids/routePath.hxx>
29 const char* RULER_LEGEND_KEY = "ruler-legend";
31 /* equatorial and polar earth radius */
32 const float rec = 6378137; // earth radius, equator (?)
33 const float rpol = 6356752.314f; // earth radius, polar (?)
35 /************************************************************************
36 some trigonometric helper functions
37 (translated more or less directly from Alexei Novikovs perl original)
38 *************************************************************************/
40 //Returns Earth radius at a given latitude (Ellipsoide equation with two equal axis)
41 static float earth_radius_lat( float lat )
43 double a = cos(lat)/rec;
44 double b = sin(lat)/rpol;
45 return 1.0f / sqrt( a * a + b * b );
48 ///////////////////////////////////////////////////////////////////////////
50 static puBox makePuBox(int x, int y, int w, int h)
60 static bool puBoxIntersect(const puBox& a, const puBox& b)
62 int x0 = SG_MAX2(a.min[0], b.min[0]);
63 int y0 = SG_MAX2(a.min[1], b.min[1]);
64 int x1 = SG_MIN2(a.max[0], b.max[0]);
65 int y1 = SG_MIN2(a.max[1], b.max[1]);
67 return (x0 <= x1) && (y0 <= y1);
71 typedef std::vector<MapData*> MapDataVec;
76 static const int HALIGN_LEFT = 1;
77 static const int HALIGN_CENTER = 2;
78 static const int HALIGN_RIGHT = 3;
80 static const int VALIGN_TOP = 1 << 4;
81 static const int VALIGN_CENTER = 2 << 4;
82 static const int VALIGN_BOTTOM = 3 << 4;
84 MapData(int priority) :
90 _offsetDir(HALIGN_LEFT | VALIGN_CENTER),
96 void setLabel(const std::string& label)
98 if (label == _label) {
99 return; // common case, and saves invalidation
106 void setText(const std::string &text)
108 if (_rawText == text) {
109 return; // common case, and saves invalidation
116 void setDataVisible(bool vis) {
117 if (vis == _dataVisible) {
121 if (_rawText.empty()) {
129 static void setFont(puFont f)
132 _fontHeight = f.getStringHeight();
133 _fontDescender = f.getStringDescender();
136 static void setPalette(puColor* pal)
141 void setPriority(int pri)
147 { return _priority; }
149 void setAnchor(const SGVec2d& anchor)
154 void setOffset(int direction, int px)
156 if ((_offsetPx == px) && (_offsetDir == direction)) {
161 _offsetDir = direction;
165 bool isClipped(const puBox& vis) const
168 if ((_width < 1) || (_height < 1)) {
172 return !puBoxIntersect(vis, box());
175 bool overlaps(const MapDataVec& l) const
180 MapDataVec::const_iterator it;
181 for (it = l.begin(); it != l.end(); ++it) {
182 if (puBoxIntersect(b, (*it)->box())) {
185 } // of list iteration
194 _anchor.x() + _offset.x(),
195 _anchor.y() + _offset.y(),
203 int xx = _anchor.x() + _offset.x();
204 int yy = _anchor.y() + _offset.y();
207 puBox box(makePuBox(0,0,_width, _height));
209 box.draw(xx, yy, PUSTYLE_DROPSHADOW, _palette, FALSE, border);
212 int lineHeight = _fontHeight;
213 int xPos = xx + MARGIN;
214 int yPos = yy + _height - (lineHeight + MARGIN);
215 glColor3f(0.8, 0.8, 0.8);
217 for (unsigned int ln=0; ln<_lines.size(); ++ln) {
218 _font.drawString(_lines[ln].c_str(), xPos, yPos);
219 yPos -= lineHeight + LINE_LEADING;
222 glColor3f(0.8, 0.8, 0.8);
223 _font.drawString(_label.c_str(), xx, yy + _fontDescender);
237 bool isExpired() const
238 { return (_age > 100); }
240 static bool order(MapData* a, MapData* b)
242 return a->_priority > b->_priority;
245 void validate() const
265 void measureData() const
267 _lines = simgear::strutils::split(_rawText, "\n");
268 // measure text to find width and height
272 for (unsigned int ln=0; ln<_lines.size(); ++ln) {
273 _height += _fontHeight;
275 _height += LINE_LEADING;
278 int lw = _font.getStringWidth(_lines[ln].c_str());
279 _width = std::max(_width, lw);
280 } // of line measurement
282 if ((_width < 1) || (_height < 1)) {
287 _height += MARGIN * 2;
288 _width += MARGIN * 2;
291 void measureLabel() const
293 if (_label.empty()) {
294 _width = _height = -1;
298 _height = _fontHeight;
299 _width = _font.getStringWidth(_label.c_str());
302 void computeOffset() const
304 _dirtyOffset = false;
305 if ((_width <= 0) || (_height <= 0)) {
312 switch (_offsetDir & 0x0f) {
319 hOffset = -(_width>>1);
323 hOffset = -(_offsetPx + _width);
327 switch (_offsetDir & 0xf0) {
330 vOffset = -(_offsetPx + _height);
334 vOffset = -(_height>>1);
342 _offset = SGVec2d(hOffset, vOffset);
345 static const int LINE_LEADING = 3;
346 static const int MARGIN = 3;
348 mutable bool _dirtyText;
349 mutable bool _dirtyOffset;
351 std::string _rawText;
353 mutable std::vector<std::string> _lines;
355 mutable int _width, _height;
359 mutable SGVec2d _offset;
363 static puColor* _palette;
364 static int _fontHeight;
365 static int _fontDescender;
368 puFont MapData::_font;
369 puColor* MapData::_palette;
370 int MapData::_fontHeight = 0;
371 int MapData::_fontDescender = 0;
373 ///////////////////////////////////////////////////////////////////////////
375 const int MAX_ZOOM = 12;
376 const int SHOW_DETAIL_ZOOM = 8;
377 const int CURSOR_PAN_STEP = 32;
379 MapWidget::MapWidget(int x, int y, int maxX, int maxY) :
380 puObject(x,y,maxX, maxY)
382 _route = static_cast<FGRouteMgr*>(globals->get_subsystem("route-manager"));
383 _gps = fgGetNode("/instrumentation/gps");
388 _orthoAzimuthProject = false;
390 MapData::setFont(legendFont);
391 MapData::setPalette(colour);
393 _magVar = new SGMagVar();
396 MapWidget::~MapWidget()
402 void MapWidget::setProperty(SGPropertyNode_ptr prop)
405 int zoom = _root->getIntValue("zoom", -1);
407 _root->setIntValue("zoom", 6); // default zoom
410 // expose MAX_ZOOM to the UI
411 _root->setIntValue("max-zoom", MAX_ZOOM);
412 _root->setBoolValue("centre-on-aircraft", true);
413 _root->setBoolValue("draw-data", false);
414 _root->setBoolValue("magnetic-headings", true);
417 void MapWidget::setSize(int w, int h)
419 puObject::setSize(w, h);
426 void MapWidget::doHit( int button, int updown, int x, int y )
428 puObject::doHit(button, updown, x, y);
429 if (updown == PU_DRAG) {
434 if (button == 3) { // mouse-wheel up
436 } else if (button == 4) { // mouse-wheel down
440 if (button != active_mouse_button) {
444 _hitLocation = SGVec2d(x - abox.min[0], y - abox.min[1]);
446 if (updown == PU_UP) {
447 puDeactivateWidget();
448 } else if (updown == PU_DOWN) {
449 puSetActiveWidget(this, x, y);
451 if (fgGetKeyModifiers() & KEYMOD_CTRL) {
452 _clickGeod = unproject(_hitLocation - SGVec2d(_width>>1, _height>>1));
457 void MapWidget::handlePan(int x, int y)
459 SGVec2d delta = SGVec2d(x, y) - _hitLocation;
461 _hitLocation = SGVec2d(x,y);
464 int MapWidget::checkKey (int key, int updown )
466 if ((updown == PU_UP) || !isVisible () || !isActive () || (window != puGetWindow())) {
474 pan(SGVec2d(0, -CURSOR_PAN_STEP));
478 pan(SGVec2d(0, CURSOR_PAN_STEP));
482 pan(SGVec2d(CURSOR_PAN_STEP, 0));
486 pan(SGVec2d(-CURSOR_PAN_STEP, 0));
505 void MapWidget::pan(const SGVec2d& delta)
508 _projectionCenter = unproject(-delta);
511 int MapWidget::zoom() const
513 int z = _root->getIntValue("zoom");
514 SG_CLAMP_RANGE(z, 0, MAX_ZOOM);
518 void MapWidget::zoomIn()
520 if (zoom() >= MAX_ZOOM) {
524 _root->setIntValue("zoom", zoom() + 1);
527 void MapWidget::zoomOut()
533 _root->setIntValue("zoom", zoom() - 1);
536 void MapWidget::draw(int dx, int dy)
538 _aircraft = SGGeod::fromDeg(fgGetDouble("/position/longitude-deg"),
539 fgGetDouble("/position/latitude-deg"));
541 bool mag = _root->getBoolValue("magnetic-headings");
542 if (mag != _magneticHeadings) {
543 clearData(); // flush cached data text, since it often includes heading
544 _magneticHeadings = mag;
548 _root->setBoolValue("centre-on-aircraft", false);
551 else if (_root->getBoolValue("centre-on-aircraft")) {
552 _projectionCenter = _aircraft;
555 double julianDate = globals->get_time_params()->getJD();
556 _magVar->update(_projectionCenter, julianDate);
558 bool aircraftUp = _root->getBoolValue("aircraft-heading-up");
560 _upHeading = fgGetDouble("/orientation/heading-deg");
565 _cachedZoom = MAX_ZOOM - zoom();
566 SGGeod topLeft = unproject(SGVec2d(_width/2, _height/2));
567 // compute draw range, including a fudge factor for ILSs and other 'long'
569 _drawRangeNm = SGGeodesy::distanceNm(_projectionCenter, topLeft) + 10.0;
571 // drawing operations
572 GLint sx = (int) abox.min[0],
573 sy = (int) abox.min[1];
574 glScissor(dx + sx, dy + sy, _width, _height);
575 glEnable(GL_SCISSOR_TEST);
577 glMatrixMode(GL_MODELVIEW);
579 // cetere drawing about the widget center (which is also the
580 // projection centre)
581 glTranslated(dx + sx + (_width/2), dy + sy + (_height/2), 0.0);
586 int textHeight = legendFont.getStringHeight() + 5;
589 SGVec2d loc = project(_aircraft);
590 glColor3f(1.0, 1.0, 1.0);
591 drawLine(loc, SGVec2d(loc.x(), (_height / 2) - textHeight));
594 if (_magneticHeadings) {
595 displayHdg = (int) fgGetDouble("/orientation/heading-magnetic-deg");
597 displayHdg = (int) _upHeading;
600 double y = (_height / 2) - textHeight;
602 ::snprintf(buf, 16, "%d", displayHdg);
603 int sw = legendFont.getStringWidth(buf);
604 legendFont.drawString(buf, loc.x() - sw/2, y);
611 drawNavRadio(fgGetNode("/instrumentation/nav[0]", false));
612 drawNavRadio(fgGetNode("/instrumentation/nav[1]", false));
613 paintAircraftLocation(_aircraft);
620 glDisable(GL_SCISSOR_TEST);
623 void MapWidget::paintRuler()
625 if (_clickGeod == SGGeod()) {
629 SGVec2d acftPos = project(_aircraft);
630 SGVec2d clickPos = project(_clickGeod);
632 glColor4f(0.0, 1.0, 1.0, 0.6);
633 drawLine(acftPos, clickPos);
635 circleAtAlt(clickPos, 8, 10, 5);
637 double dist, az, az2;
638 SGGeodesy::inverse(_aircraft, _clickGeod, az, az2, dist);
640 ::snprintf(buffer, 1024, "%03d/%.1fnm",
641 displayHeading(az), dist * SG_METER_TO_NM);
643 MapData* d = getOrCreateDataForKey((void*) RULER_LEGEND_KEY);
645 d->setAnchor(clickPos);
646 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
647 d->setPriority(20000);
652 void MapWidget::paintAircraftLocation(const SGGeod& aircraftPos)
654 SGVec2d loc = project(aircraftPos);
656 double hdg = fgGetDouble("/orientation/heading-deg");
659 glColor4f(1.0, 1.0, 0.0, 1.0);
661 glTranslated(loc.x(), loc.y(), 0.0);
662 glRotatef(hdg - _upHeading, 0.0, 0.0, -1.0);
664 const SGVec2d wingspan(12, 0);
665 const SGVec2d nose(0, 8);
666 const SGVec2d tail(0, -14);
667 const SGVec2d tailspan(4,0);
669 drawLine(-wingspan, wingspan);
670 drawLine(nose, tail);
671 drawLine(tail - tailspan, tail + tailspan);
677 void MapWidget::paintRoute()
679 if (_route->numWaypts() < 2) {
683 RoutePath path(_route->flightPlan());
685 // first pass, draw the actual lines
688 for (int w=0; w<_route->numWaypts(); ++w) {
689 SGGeodVec gv(path.pathForIndex(w));
694 if (w < _route->currentIndex()) {
695 glColor4f(0.5, 0.5, 0.5, 0.7);
697 glColor4f(1.0, 0.0, 1.0, 1.0);
700 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
701 if (wpt->flag(flightgear::WPT_MISS)) {
702 glEnable(GL_LINE_STIPPLE);
703 glLineStipple(1, 0x00FF);
706 glBegin(GL_LINE_STRIP);
707 for (unsigned int i=0; i<gv.size(); ++i) {
708 SGVec2d p = project(gv[i]);
709 glVertex2d(p.x(), p.y());
713 glDisable(GL_LINE_STIPPLE);
717 // second pass, draw waypoint symbols and data
718 for (int w=0; w < _route->numWaypts(); ++w) {
719 flightgear::WayptRef wpt(_route->wayptAtIndex(w));
720 SGGeod g = path.positionForIndex(w);
722 continue; // Vectors or similar
725 SGVec2d p = project(g);
726 glColor4f(1.0, 0.0, 1.0, 1.0);
727 circleAtAlt(p, 8, 12, 5);
729 std::ostringstream legend;
730 legend << wpt->ident();
731 if (wpt->altitudeRestriction() != flightgear::RESTRICT_NONE) {
732 legend << '\n' << SGMiscd::roundToInt(wpt->altitudeFt()) << '\'';
735 if (wpt->speedRestriction() == flightgear::SPEED_RESTRICT_MACH) {
736 legend << '\n' << wpt->speedMach() << "M";
737 } else if (wpt->speedRestriction() != flightgear::RESTRICT_NONE) {
738 legend << '\n' << SGMiscd::roundToInt(wpt->speedKts()) << "Kts";
741 MapData* d = getOrCreateDataForKey(reinterpret_cast<void*>(w * 2));
742 d->setText(legend.str());
743 d->setLabel(wpt->ident());
745 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 15);
746 d->setPriority(w < _route->currentIndex() ? 9000 : 12000);
748 } // of second waypoint iteration
752 * Round a SGGeod to an arbitrary precision.
753 * For example, passing precision of 0.5 will round to the nearest 0.5 of
754 * a degree in both lat and lon - passing in 3.0 rounds to the nearest 3 degree
755 * multiple, and so on.
757 static SGGeod roundGeod(double precision, const SGGeod& g)
759 double lon = SGMiscd::round(g.getLongitudeDeg() / precision);
760 double lat = SGMiscd::round(g.getLatitudeDeg() / precision);
762 return SGGeod::fromDeg(lon * precision, lat * precision);
765 bool MapWidget::drawLineClipped(const SGVec2d& a, const SGVec2d& b)
767 double minX = SGMiscd::min(a.x(), b.x()),
768 minY = SGMiscd::min(a.y(), b.y()),
769 maxX = SGMiscd::max(a.x(), b.x()),
770 maxY = SGMiscd::max(a.y(), b.y());
772 int hh = _height >> 1, hw = _width >> 1;
774 if ((maxX < -hw) || (minX > hw) || (minY > hh) || (maxY < -hh)) {
778 glVertex2dv(a.data());
779 glVertex2dv(b.data());
783 SGVec2d MapWidget::gridPoint(int ix, int iy)
785 int key = (ix + 0x7fff) | ((iy + 0x7fff) << 16);
786 GridPointCache::iterator it = _gridCache.find(key);
787 if (it != _gridCache.end()) {
791 SGGeod gp = SGGeod::fromDeg(
792 _gridCenter.getLongitudeDeg() + ix * _gridSpacing,
793 _gridCenter.getLatitudeDeg() + iy * _gridSpacing);
795 SGVec2d proj = project(gp);
796 _gridCache[key] = proj;
800 void MapWidget::drawLatLonGrid()
803 _gridCenter = roundGeod(_gridSpacing, _projectionCenter);
809 glColor4f(0.8, 0.8, 0.8, 0.4);
817 for (int x = -ix; x < ix; ++x) {
818 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x+1, -iy));
819 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x+1, iy));
820 didDraw |= drawLineClipped(gridPoint(x, -iy), gridPoint(x, -iy + 1));
821 didDraw |= drawLineClipped(gridPoint(x, iy), gridPoint(x, iy - 1));
825 for (int y = -iy; y < iy; ++y) {
826 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix, y+1));
827 didDraw |= drawLineClipped(gridPoint(-ix, y), gridPoint(-ix + 1, y));
828 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix, y+1));
829 didDraw |= drawLineClipped(gridPoint(ix, y), gridPoint(ix - 1, y));
840 void MapWidget::drawGPSData()
842 std::string gpsMode = _gps->getStringValue("mode");
844 SGGeod wp0Geod = SGGeod::fromDeg(
845 _gps->getDoubleValue("wp/wp[0]/longitude-deg"),
846 _gps->getDoubleValue("wp/wp[0]/latitude-deg"));
848 SGGeod wp1Geod = SGGeod::fromDeg(
849 _gps->getDoubleValue("wp/wp[1]/longitude-deg"),
850 _gps->getDoubleValue("wp/wp[1]/latitude-deg"));
853 double gpsTrackDeg = _gps->getDoubleValue("indicated-track-true-deg");
854 double gpsSpeed = _gps->getDoubleValue("indicated-ground-speed-kt");
857 if (gpsSpeed > 3.0) { // only draw track line if valid
859 SGGeodesy::direct(_aircraft, gpsTrackDeg, _drawRangeNm * SG_NM_TO_METER, trackRadial, az2);
861 glColor4f(1.0, 1.0, 0.0, 1.0);
862 glEnable(GL_LINE_STIPPLE);
863 glLineStipple(1, 0x00FF);
864 drawLine(project(_aircraft), project(trackRadial));
865 glDisable(GL_LINE_STIPPLE);
868 if (gpsMode == "dto") {
869 SGVec2d wp0Pos = project(wp0Geod);
870 SGVec2d wp1Pos = project(wp1Geod);
872 glColor4f(1.0, 0.0, 1.0, 1.0);
873 drawLine(wp0Pos, wp1Pos);
877 if (_gps->getBoolValue("scratch/valid")) {
883 class MapAirportFilter : public FGAirport::AirportFilter
886 MapAirportFilter(SGPropertyNode_ptr nd)
888 _heliports = nd->getBoolValue("show-heliports", false);
889 _hardRunwaysOnly = nd->getBoolValue("hard-surfaced-airports", true);
890 _minLengthFt = fgGetDouble("/sim/navdb/min-runway-length-ft", 2000);
893 virtual FGPositioned::Type maxType() const {
894 return _heliports ? FGPositioned::HELIPORT : FGPositioned::AIRPORT;
897 virtual bool passAirport(FGAirport* aApt) const {
898 if (_hardRunwaysOnly) {
899 return aApt->hasHardRunwayOfLengthFt(_minLengthFt);
907 bool _hardRunwaysOnly;
911 void MapWidget::drawAirports()
913 MapAirportFilter af(_root);
914 FGPositioned::List apts = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &af);
915 for (unsigned int i=0; i<apts.size(); ++i) {
916 drawAirport((FGAirport*) apts[i].get());
920 class NavaidFilter : public FGPositioned::Filter
923 NavaidFilter(bool fixesEnabled, bool navaidsEnabled) :
924 _fixes(fixesEnabled),
925 _navaids(navaidsEnabled)
928 virtual bool pass(FGPositioned* aPos) const {
929 if (_fixes && (aPos->type() == FGPositioned::FIX)) {
930 // ignore fixes which end in digits - expirmental
931 if (aPos->ident().length() > 4 && isdigit(aPos->ident()[3]) && isdigit(aPos->ident()[4])) {
939 virtual FGPositioned::Type minType() const {
940 return _fixes ? FGPositioned::FIX : FGPositioned::VOR;
943 virtual FGPositioned::Type maxType() const {
944 return _navaids ? FGPositioned::NDB : FGPositioned::FIX;
948 bool _fixes, _navaids;
951 void MapWidget::drawNavaids()
953 bool fixes = _root->getBoolValue("draw-fixes");
954 NavaidFilter f(fixes, _root->getBoolValue("draw-navaids"));
956 if (f.minType() <= f.maxType()) {
957 FGPositioned::List navs = FGPositioned::findWithinRange(_projectionCenter, _drawRangeNm, &f);
960 for (unsigned int i=0; i<navs.size(); ++i) {
961 FGPositioned::Type ty = navs[i]->type();
962 if (ty == FGPositioned::NDB) {
963 drawNDB(false, (FGNavRecord*) navs[i].get());
964 } else if (ty == FGPositioned::VOR) {
965 drawVOR(false, (FGNavRecord*) navs[i].get());
966 } else if (ty == FGPositioned::FIX) {
967 drawFix((FGFix*) navs[i].get());
969 } // of navaid iteration
970 } // of navaids || fixes are drawn test
973 void MapWidget::drawNDB(bool tuned, FGNavRecord* ndb)
975 SGVec2d pos = project(ndb->geod());
978 glColor3f(0.0, 1.0, 1.0);
980 glColor3f(0.0, 0.0, 0.0);
983 glEnable(GL_LINE_STIPPLE);
984 glLineStipple(1, 0x00FF);
985 circleAt(pos, 20, 6);
986 circleAt(pos, 20, 10);
987 glDisable(GL_LINE_STIPPLE);
989 if (validDataForKey(ndb)) {
990 setAnchorForKey(ndb, pos);
995 ::snprintf(buffer, 1024, "%s\n%s %3.0fKhz",
996 ndb->name().c_str(), ndb->ident().c_str(),ndb->get_freq()/100.0);
998 MapData* d = createDataForKey(ndb);
1000 d->setLabel(ndb->ident());
1002 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1007 void MapWidget::drawVOR(bool tuned, FGNavRecord* vor)
1009 SGVec2d pos = project(vor->geod());
1011 glColor3f(0.0, 1.0, 1.0);
1013 glColor3f(0.0, 0.0, 1.0);
1016 circleAt(pos, 6, 8);
1018 if (validDataForKey(vor)) {
1019 setAnchorForKey(vor, pos);
1024 ::snprintf(buffer, 1024, "%s\n%s %6.3fMhz",
1025 vor->name().c_str(), vor->ident().c_str(),
1026 vor->get_freq() / 100.0);
1028 MapData* d = createDataForKey(vor);
1030 d->setLabel(vor->ident());
1031 d->setPriority(tuned ? 10000 : 100);
1032 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1036 void MapWidget::drawFix(FGFix* fix)
1038 SGVec2d pos = project(fix->geod());
1039 glColor3f(0.0, 0.0, 0.0);
1040 circleAt(pos, 3, 6);
1042 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1043 return; // hide fix labels beyond a certain zoom level
1046 if (validDataForKey(fix)) {
1047 setAnchorForKey(fix, pos);
1051 MapData* d = createDataForKey(fix);
1052 d->setLabel(fix->ident());
1054 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1058 void MapWidget::drawNavRadio(SGPropertyNode_ptr radio)
1060 if (!radio || radio->getBoolValue("slaved-to-gps", false)
1061 || !radio->getBoolValue("in-range", false)) {
1065 if (radio->getBoolValue("nav-loc", false)) {
1066 drawTunedLocalizer(radio);
1069 // identify the tuned station - unfortunately we don't get lat/lon directly,
1070 // need to do the frequency search again
1071 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1072 FGNavRecord* nav = globals->get_navlist()->findByFreq(mhz, _aircraft);
1073 if (!nav || (nav->ident() != radio->getStringValue("nav-id"))) {
1074 // mismatch between navradio selection logic and ours!
1081 SGVec2d pos = project(nav->geod());
1084 double trueRadial = radio->getDoubleValue("radials/target-radial-deg");
1085 SGGeodesy::direct(nav->geod(), trueRadial, nav->get_range() * SG_NM_TO_METER, range, az2);
1086 SGVec2d prange = project(range);
1088 SGVec2d norm = normalize(prange - pos);
1089 SGVec2d perp(norm.y(), -norm.x());
1091 circleAt(pos, 64, length(prange - pos));
1092 drawLine(pos, prange);
1094 // draw to/from arrows
1095 SGVec2d midPoint = (pos + prange) * 0.5;
1096 if (radio->getBoolValue("from-flag")) {
1102 SGVec2d arrowB = midPoint - (norm * sz) + (perp * sz);
1103 SGVec2d arrowC = midPoint - (norm * sz) - (perp * sz);
1104 drawLine(midPoint, arrowB);
1105 drawLine(arrowB, arrowC);
1106 drawLine(arrowC, midPoint);
1108 drawLine(pos, (2 * pos) - prange); // reciprocal radial
1111 void MapWidget::drawTunedLocalizer(SGPropertyNode_ptr radio)
1113 double mhz = radio->getDoubleValue("frequencies/selected-mhz", 0.0);
1114 FGNavRecord* loc = globals->get_loclist()->findByFreq(mhz, _aircraft);
1115 if (!loc || (loc->ident() != radio->getStringValue("nav-id"))) {
1116 // mismatch between navradio selection logic and ours!
1120 if (loc->runway()) {
1121 drawILS(true, loc->runway());
1126 void MapWidget::drawObstacle(FGPositioned* obs)
1128 SGVec2d pos = project(obs->geod());
1129 glColor3f(0.0, 0.0, 0.0);
1131 drawLine(pos, pos + SGVec2d());
1135 void MapWidget::drawAirport(FGAirport* apt)
1137 // draw tower location
1138 SGVec2d towerPos = project(apt->getTowerLocation());
1140 if (_cachedZoom <= SHOW_DETAIL_ZOOM) {
1141 glColor3f(1.0, 1.0, 1.0);
1144 drawLine(towerPos + SGVec2d(3, 0), towerPos + SGVec2d(3, 10));
1145 drawLine(towerPos + SGVec2d(-3, 0), towerPos + SGVec2d(-3, 10));
1146 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(-3, 10));
1147 drawLine(towerPos + SGVec2d(6, 20), towerPos + SGVec2d(3, 10));
1148 drawLine(towerPos + SGVec2d(-6, 20), towerPos + SGVec2d(6, 20));
1151 if (validDataForKey(apt)) {
1152 setAnchorForKey(apt, towerPos);
1155 ::snprintf(buffer, 1024, "%s\n%s",
1156 apt->ident().c_str(), apt->name().c_str());
1158 MapData* d = createDataForKey(apt);
1160 d->setLabel(apt->ident());
1161 d->setPriority(100 + scoreAirportRunways(apt));
1162 d->setOffset(MapData::VALIGN_TOP | MapData::HALIGN_CENTER, 6);
1163 d->setAnchor(towerPos);
1166 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1170 for (unsigned int r=0; r<apt->numRunways(); ++r) {
1171 FGRunway* rwy = apt->getRunwayByIndex(r);
1172 if (!rwy->isReciprocal()) {
1177 for (unsigned int r=0; r<apt->numRunways(); ++r) {
1178 FGRunway* rwy = apt->getRunwayByIndex(r);
1179 if (!rwy->isReciprocal()) {
1184 drawILS(false, rwy);
1186 } // of runway iteration
1190 int MapWidget::scoreAirportRunways(FGAirport* apt)
1192 bool needHardSurface = _root->getBoolValue("hard-surfaced-airports", true);
1193 double minLength = _root->getDoubleValue("min-runway-length-ft", 2000.0);
1196 unsigned int numRunways(apt->numRunways());
1197 for (unsigned int r=0; r<numRunways; ++r) {
1198 FGRunway* rwy = apt->getRunwayByIndex(r);
1199 if (rwy->isReciprocal()) {
1203 if (needHardSurface && !rwy->isHardSurface()) {
1207 if (rwy->lengthFt() < minLength) {
1211 int scoreLength = SGMiscd::roundToInt(rwy->lengthFt() / 200.0);
1212 score += scoreLength;
1213 } // of runways iteration
1218 void MapWidget::drawRunwayPre(FGRunway* rwy)
1220 SGVec2d p1 = project(rwy->begin());
1221 SGVec2d p2 = project(rwy->end());
1224 glColor3f(1.0, 0.0, 1.0);
1228 void MapWidget::drawRunway(FGRunway* rwy)
1231 // optionally show active, stopway, etc
1232 // in legend, show published heading and length
1233 // and threshold elevation
1235 SGVec2d p1 = project(rwy->begin());
1236 SGVec2d p2 = project(rwy->end());
1238 glColor3f(1.0, 1.0, 1.0);
1239 SGVec2d inset = normalize(p2 - p1) * 2;
1241 drawLine(p1 + inset, p2 - inset);
1243 if (validDataForKey(rwy)) {
1244 setAnchorForKey(rwy, (p1 + p2) * 0.5);
1249 ::snprintf(buffer, 1024, "%s/%s\n%03d/%03d\n%.0f'",
1250 rwy->ident().c_str(),
1251 rwy->reciprocalRunway()->ident().c_str(),
1252 displayHeading(rwy->headingDeg()),
1253 displayHeading(rwy->reciprocalRunway()->headingDeg()),
1256 MapData* d = createDataForKey(rwy);
1258 d->setLabel(rwy->ident() + "/" + rwy->reciprocalRunway()->ident());
1260 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 12);
1261 d->setAnchor((p1 + p2) * 0.5);
1264 void MapWidget::drawILS(bool tuned, FGRunway* rwy)
1266 // arrow, tip centered on the landing threshold
1267 // using LOC transmitter position would be more accurate, but
1268 // is visually cluttered
1269 // arrow width is based upon the computed localizer width
1271 FGNavRecord* loc = rwy->ILS();
1272 double halfBeamWidth = loc->localizerWidth() * 0.5;
1273 SGVec2d t = project(rwy->threshold());
1275 double rangeM = loc->get_range() * SG_NM_TO_METER;
1276 double radial = loc->get_multiuse();
1277 SG_NORMALIZE_RANGE(radial, 0.0, 360.0);
1280 // compute the three end points at the widge end of the arrow
1281 SGGeodesy::direct(loc->geod(), radial, -rangeM, locEnd, az2);
1282 SGVec2d endCentre = project(locEnd);
1284 SGGeodesy::direct(loc->geod(), radial + halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1285 SGVec2d endR = project(locEnd);
1287 SGGeodesy::direct(loc->geod(), radial - halfBeamWidth, -rangeM * 1.1, locEnd, az2);
1288 SGVec2d endL = project(locEnd);
1290 // outline two triangles
1293 glColor3f(0.0, 1.0, 1.0);
1295 glColor3f(0.0, 0.0, 1.0);
1298 glBegin(GL_LINE_LOOP);
1299 glVertex2dv(t.data());
1300 glVertex2dv(endCentre.data());
1301 glVertex2dv(endL.data());
1303 glBegin(GL_LINE_LOOP);
1304 glVertex2dv(t.data());
1305 glVertex2dv(endCentre.data());
1306 glVertex2dv(endR.data());
1309 if (validDataForKey(loc)) {
1310 setAnchorForKey(loc, endR);
1315 ::snprintf(buffer, 1024, "%s\n%s\n%03d - %3.2fMHz",
1316 loc->ident().c_str(), loc->name().c_str(),
1317 displayHeading(radial),
1318 loc->get_freq()/100.0);
1320 MapData* d = createDataForKey(loc);
1322 d->setLabel(loc->ident());
1324 d->setOffset(MapData::HALIGN_CENTER | MapData::VALIGN_BOTTOM, 10);
1328 void MapWidget::drawTraffic()
1330 if (!_root->getBoolValue("draw-traffic")) {
1334 if (_cachedZoom > SHOW_DETAIL_ZOOM) {
1338 const SGPropertyNode* ai = fgGetNode("/ai/models", true);
1340 for (int i = 0; i < ai->nChildren(); ++i) {
1341 const SGPropertyNode *model = ai->getChild(i);
1342 // skip bad or dead entries
1343 if (!model || model->getIntValue("id", -1) == -1) {
1347 const std::string& name(model->getName());
1348 SGGeod pos = SGGeod::fromDegFt(
1349 model->getDoubleValue("position/longitude-deg"),
1350 model->getDoubleValue("position/latitude-deg"),
1351 model->getDoubleValue("position/altitude-ft"));
1353 double dist = SGGeodesy::distanceNm(_projectionCenter, pos);
1354 if (dist > _drawRangeNm) {
1358 double heading = model->getDoubleValue("orientation/true-heading-deg");
1359 if ((name == "aircraft") || (name == "multiplayer") ||
1360 (name == "wingman") || (name == "tanker")) {
1361 drawAIAircraft(model, pos, heading);
1362 } else if ((name == "ship") || (name == "carrier") || (name == "escort")) {
1363 drawAIShip(model, pos, heading);
1365 } // of ai/models iteration
1368 void MapWidget::drawAIAircraft(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1371 SGVec2d p = project(pos);
1373 glColor3f(0.0, 0.0, 0.0);
1375 circleAt(p, 4, 6.0); // black diamond
1377 // draw heading vector
1378 int speedKts = static_cast<int>(model->getDoubleValue("velocities/true-airspeed-kt"));
1382 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1383 double distanceM = speedKts * SG_NM_TO_METER * dt;
1387 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1389 drawLine(p, project(advance));
1393 // draw callsign / altitude / speed
1395 ::snprintf(buffer, 1024, "%s\n%d'\n%dkts",
1396 model->getStringValue("callsign", "<>"),
1397 static_cast<int>(pos.getElevationFt() / 50.0) * 50,
1400 MapData* d = getOrCreateDataForKey((void*) model);
1402 d->setLabel(model->getStringValue("callsign", "<>"));
1403 d->setPriority(speedKts > 5 ? 60 : 10); // low priority for parked aircraft
1404 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1409 void MapWidget::drawAIShip(const SGPropertyNode* model, const SGGeod& pos, double hdg)
1411 SGVec2d p = project(pos);
1413 glColor3f(0.0, 0.0, 0.5);
1415 circleAt(p, 4, 6.0); // blue diamond (to differentiate from aircraft.
1417 // draw heading vector
1418 int speedKts = static_cast<int>(model->getDoubleValue("velocities/speed-kts"));
1422 const double dt = 15.0 / (3600.0); // 15 seconds look-ahead
1423 double distanceM = speedKts * SG_NM_TO_METER * dt;
1427 SGGeodesy::direct(pos, hdg, distanceM, advance, az2);
1429 drawLine(p, project(advance));
1432 // draw callsign / speed
1434 ::snprintf(buffer, 1024, "%s\n%dkts",
1435 model->getStringValue("name", "<>"),
1438 MapData* d = getOrCreateDataForKey((void*) model);
1440 d->setLabel(model->getStringValue("name", "<>"));
1441 d->setPriority(speedKts > 2 ? 30 : 10); // low priority for slow moving ships
1442 d->setOffset(MapData::VALIGN_CENTER | MapData::HALIGN_LEFT, 10);
1446 SGVec2d MapWidget::project(const SGGeod& geod) const
1449 double r = earth_radius_lat(geod.getLatitudeRad());
1451 if (_orthoAzimuthProject) {
1452 // http://mathworld.wolfram.com/OrthographicProjection.html
1453 double cosTheta = cos(geod.getLatitudeRad());
1454 double sinDLambda = sin(geod.getLongitudeRad() - _projectionCenter.getLongitudeRad());
1455 double cosDLambda = cos(geod.getLongitudeRad() - _projectionCenter.getLongitudeRad());
1456 double sinTheta1 = sin(_projectionCenter.getLatitudeRad());
1457 double sinTheta = sin(geod.getLatitudeRad());
1458 double cosTheta1 = cos(_projectionCenter.getLatitudeRad());
1460 p = SGVec2d(cosTheta * sinDLambda,
1461 (cosTheta1 * sinTheta) - (sinTheta1 * cosTheta * cosDLambda)) * r * currentScale();
1464 // Sanson-Flamsteed projection, relative to the projection center
1465 double lonDiff = geod.getLongitudeRad() - _projectionCenter.getLongitudeRad(),
1466 latDiff = geod.getLatitudeRad() - _projectionCenter.getLatitudeRad();
1468 p = SGVec2d(cos(geod.getLatitudeRad()) * lonDiff, latDiff) * r * currentScale();
1472 // rotate as necessary
1473 double cost = cos(_upHeading * SG_DEGREES_TO_RADIANS),
1474 sint = sin(_upHeading * SG_DEGREES_TO_RADIANS);
1475 double rx = cost * p.x() - sint * p.y();
1476 double ry = sint * p.x() + cost * p.y();
1477 return SGVec2d(rx, ry);
1480 SGGeod MapWidget::unproject(const SGVec2d& p) const
1482 // unrotate, if necessary
1483 double cost = cos(-_upHeading * SG_DEGREES_TO_RADIANS),
1484 sint = sin(-_upHeading * SG_DEGREES_TO_RADIANS);
1485 SGVec2d ur(cost * p.x() - sint * p.y(),
1486 sint * p.x() + cost * p.y());
1488 double r = earth_radius_lat(_projectionCenter.getLatitudeRad());
1489 SGVec2d unscaled = ur * (1.0 / (currentScale() * r));
1491 if (_orthoAzimuthProject) {
1492 double phi = length(p);
1493 double c = asin(phi);
1494 double sinTheta1 = sin(_projectionCenter.getLatitudeRad());
1495 double cosTheta1 = cos(_projectionCenter.getLatitudeRad());
1497 double lat = asin(cos(c) * sinTheta1 + ((unscaled.y() * sin(c) * cosTheta1) / phi));
1498 double lon = _projectionCenter.getLongitudeRad() +
1499 atan((unscaled.x()* sin(c)) / (phi * cosTheta1 * cos(c) - unscaled.y() * sinTheta1 * sin(c)));
1500 return SGGeod::fromRad(lon, lat);
1502 double lat = unscaled.y() + _projectionCenter.getLatitudeRad();
1503 double lon = (unscaled.x() / cos(lat)) + _projectionCenter.getLongitudeRad();
1504 return SGGeod::fromRad(lon, lat);
1508 double MapWidget::currentScale() const
1510 return 1.0 / pow(2.0, _cachedZoom);
1513 void MapWidget::circleAt(const SGVec2d& center, int nSides, double r)
1515 glBegin(GL_LINE_LOOP);
1516 double advance = (SGD_PI * 2) / nSides;
1517 glVertex2d(center.x(), center.y() + r);
1519 for (int i=1; i<nSides; ++i) {
1520 glVertex2d(center.x() + (sin(t) * r), center.y() + (cos(t) * r));
1526 void MapWidget::circleAtAlt(const SGVec2d& center, int nSides, double r, double r2)
1528 glBegin(GL_LINE_LOOP);
1529 double advance = (SGD_PI * 2) / nSides;
1530 glVertex2d(center.x(), center.y() + r);
1532 for (int i=1; i<nSides; ++i) {
1533 double rr = (i%2 == 0) ? r : r2;
1534 glVertex2d(center.x() + (sin(t) * rr), center.y() + (cos(t) * rr));
1540 void MapWidget::drawLine(const SGVec2d& p1, const SGVec2d& p2)
1543 glVertex2dv(p1.data());
1544 glVertex2dv(p2.data());
1548 void MapWidget::drawLegendBox(const SGVec2d& pos, const std::string& t)
1550 std::vector<std::string> lines(simgear::strutils::split(t, "\n"));
1551 const int LINE_LEADING = 4;
1552 const int MARGIN = 4;
1555 int maxWidth = -1, totalHeight = 0;
1556 int lineHeight = legendFont.getStringHeight();
1558 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1559 totalHeight += lineHeight;
1561 totalHeight += LINE_LEADING;
1564 int lw = legendFont.getStringWidth(lines[ln].c_str());
1565 maxWidth = std::max(maxWidth, lw);
1566 } // of line measurement
1569 return; // all lines are empty, don't draw
1572 totalHeight += MARGIN * 2;
1577 box.min[1] = -totalHeight;
1578 box.max[0] = maxWidth + (MARGIN * 2);
1581 box.draw (pos.x(), pos.y(), PUSTYLE_DROPSHADOW, colour, FALSE, border);
1584 int xPos = pos.x() + MARGIN;
1585 int yPos = pos.y() - (lineHeight + MARGIN);
1586 glColor3f(0.8, 0.8, 0.8);
1588 for (unsigned int ln=0; ln<lines.size(); ++ln) {
1589 legendFont.drawString(lines[ln].c_str(), xPos, yPos);
1590 yPos -= lineHeight + LINE_LEADING;
1594 void MapWidget::drawData()
1596 std::sort(_dataQueue.begin(), _dataQueue.end(), MapData::order);
1598 int hw = _width >> 1,
1600 puBox visBox(makePuBox(-hw, -hh, _width, _height));
1604 std::vector<MapData*> drawQueue;
1606 bool drawData = _root->getBoolValue("draw-data");
1607 const int MAX_DRAW_DATA = 25;
1608 const int MAX_DRAW = 50;
1610 for (; (d < _dataQueue.size()) && (drawn < MAX_DRAW); ++d) {
1611 MapData* md = _dataQueue[d];
1612 md->setDataVisible(drawData);
1614 if (md->isClipped(visBox)) {
1618 if (md->overlaps(drawQueue)) {
1619 if (drawData) { // overlapped with data, let's try just the label
1620 md->setDataVisible(false);
1621 if (md->overlaps(drawQueue)) {
1627 } // of overlaps case
1629 drawQueue.push_back(md);
1631 if (drawData && (drawn >= MAX_DRAW_DATA)) {
1636 // draw lowest-priority first, so higher-priorty items appear on top
1637 std::vector<MapData*>::reverse_iterator r;
1638 for (r = drawQueue.rbegin(); r!= drawQueue.rend(); ++r) {
1643 KeyDataMap::iterator it = _mapData.begin();
1644 for (; it != _mapData.end(); ) {
1646 if (it->second->isExpired()) {
1648 KeyDataMap::iterator cur = it++;
1649 _mapData.erase(cur);
1653 } // of expiry iteration
1656 bool MapWidget::validDataForKey(void* key)
1658 KeyDataMap::iterator it = _mapData.find(key);
1659 if (it == _mapData.end()) {
1660 return false; // no valid data for the key!
1663 it->second->resetAge(); // mark data as valid this frame
1664 _dataQueue.push_back(it->second);
1668 void MapWidget::setAnchorForKey(void* key, const SGVec2d& anchor)
1670 KeyDataMap::iterator it = _mapData.find(key);
1671 if (it == _mapData.end()) {
1672 throw sg_exception("no valid data for key!");
1675 it->second->setAnchor(anchor);
1678 MapData* MapWidget::getOrCreateDataForKey(void* key)
1680 KeyDataMap::iterator it = _mapData.find(key);
1681 if (it == _mapData.end()) {
1682 return createDataForKey(key);
1685 it->second->resetAge(); // mark data as valid this frame
1686 _dataQueue.push_back(it->second);
1690 MapData* MapWidget::createDataForKey(void* key)
1692 KeyDataMap::iterator it = _mapData.find(key);
1693 if (it != _mapData.end()) {
1694 throw sg_exception("duplicate data requested for key!");
1697 MapData* d = new MapData(0);
1699 _dataQueue.push_back(d);
1704 void MapWidget::clearData()
1706 KeyDataMap::iterator it = _mapData.begin();
1707 for (; it != _mapData.end(); ++it) {
1714 int MapWidget::displayHeading(double h) const
1716 if (_magneticHeadings) {
1717 h -= _magVar->get_magvar() * SG_RADIANS_TO_DEGREES;
1720 SG_NORMALIZE_RANGE(h, 0.0, 360.0);
1721 return SGMiscd::roundToInt(h);