1 // Wx Radar background texture
3 // Written by Harald JOHNSEN, started May 2005.
4 // With major amendments by Vivian MEAZZA May 2007
5 // Ported to OSG by Tim Moore Jun 2007
8 // Copyright (C) 2005 Harald JOHNSEN
10 // This program is free software; you can redistribute it and/or
11 // modify it under the terms of the GNU General Public License as
12 // published by the Free Software Foundation; either version 2 of the
13 // License, or (at your option) any later version.
15 // This program is distributed in the hope that it will be useful, but
16 // WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 // General Public License for more details.
20 // You should have received a copy of the GNU General Public License
21 // along with this program; if not, write to the Free Software
22 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
31 #include <osg/Geometry>
32 #include <osg/Matrixf>
33 #include <osg/PrimitiveSet>
34 #include <osg/StateSet>
35 #include <osg/Version>
36 #include <osgDB/ReaderWriter>
37 #include <osgDB/WriteFile>
39 #include <simgear/constants.h>
40 #include <simgear/misc/sg_path.hxx>
41 #include <simgear/scene/model/model.hxx>
42 #include <simgear/structure/exception.hxx>
43 #include <simgear/misc/sg_path.hxx>
44 #include <simgear/math/sg_geodesy.hxx>
49 using std::stringstream;
51 using std::setprecision;
57 #include <Main/fg_props.hxx>
58 #include <Main/globals.hxx>
59 #include <Cockpit/panel.hxx>
61 #include "instrument_mgr.hxx"
62 #include "od_gauge.hxx"
63 #include "wxradar.hxx"
65 #include <iostream> // for cout, endl
70 static const float UNIT = 1.0f / 8.0f; // 8 symbols in a row/column in the texture
71 static const char *DEFAULT_FONT = "typewriter.txf";
73 wxRadarBg::wxRadarBg(SGPropertyNode *node) :
74 _name(node->getStringValue("name", "radar")),
75 _num(node->getIntValue("number", 0)),
77 _interval(node->getDoubleValue("update-interval-sec", 1.0)),
80 _sim_init_done(false),
91 _antenna_ht(node->getDoubleValue("antenna-ht-ft", 0.0)),
98 branch = "/instrumentation/" + _name;
99 _Instrument = fgGetNode(branch.c_str(), _num, true);
101 const char *tacan_source = node->getStringValue("tacan-source", "/instrumentation/tacan");
102 _Tacan = fgGetNode(tacan_source, true);
104 _font_node = _Instrument->getNode("font", true);
106 #define INITFONT(p, val, type) if (!_font_node->hasValue(p)) _font_node->set##type##Value(p, val)
107 INITFONT("name", DEFAULT_FONT, String);
108 INITFONT("size", 8, Float);
109 INITFONT("line-spacing", 0.25, Float);
110 INITFONT("color/red", 0, Float);
111 INITFONT("color/green", 0.8, Float);
112 INITFONT("color/blue", 0, Float);
113 INITFONT("color/alpha", 1, Float);
116 _font_node->addChangeListener(this, true);
120 wxRadarBg::~wxRadarBg ()
122 _font_node->removeChangeListener(this);
129 _serviceable_node = _Instrument->getNode("serviceable", true);
131 // texture name to use in 2D and 3D instruments
132 _texture_path = _Instrument->getStringValue("radar-texture-path",
133 "Aircraft/Instruments/Textures/od_wxradar.rgb");
134 _resultTexture = FGTextureManager::createTexture(_texture_path.c_str(), false);
136 string path = _Instrument->getStringValue("echo-texture-path",
137 "Aircraft/Instruments/Textures/wxecho.rgb");
138 SGPath tpath = globals->resolve_aircraft_path(path);
140 // no mipmap or else alpha will mix with pixels on the border of shapes, ruining the effect
141 _wxEcho = SGLoadTexture2D(tpath, NULL, false, false);
144 _Instrument->setFloatValue("trk", 0.0);
145 _Instrument->setFloatValue("tilt", 0.0);
146 _Instrument->setStringValue("status", "");
147 // those properties are used by a radar instrument of a MFD
148 // input switch = OFF | TST | STBY | ON
149 // input mode = WX | WXA | MAP
150 // output status = STBY | TEST | WX | WXA | MAP | blank
151 // input lightning = true | false
152 // input TRK = +/- n degrees
153 // input TILT = +/- n degree
154 // input autotilt = true | false
155 // input range = n nm (20/40/80)
156 // input display-mode = arc | rose | map | plan
158 FGInstrumentMgr *imgr = (FGInstrumentMgr *)globals->get_subsystem("instrumentation");
159 _odg = (FGODGauge *)imgr->get_subsystem("od_gauge");
162 _ai_enabled_node = fgGetNode("/sim/ai/enabled", true);
164 _user_lat_node = fgGetNode("/position/latitude-deg", true);
165 _user_lon_node = fgGetNode("/position/longitude-deg", true);
166 _user_alt_node = fgGetNode("/position/altitude-ft", true);
168 _user_speed_east_fps_node = fgGetNode("/velocities/speed-east-fps", true);
169 _user_speed_north_fps_node = fgGetNode("/velocities/speed-north-fps", true);
171 _tacan_serviceable_node = _Tacan->getNode("serviceable", true);
172 _tacan_distance_node = _Tacan->getNode("indicated-distance-nm", true);
173 _tacan_name_node = _Tacan->getNode("name", true);
174 _tacan_bearing_node = _Tacan->getNode("indicated-bearing-true-deg", true);
175 _tacan_in_range_node = _Tacan->getNode("in-range", true);
177 _radar_mode_control_node = _Instrument->getNode("mode-control", true);
178 _radar_coverage_node = _Instrument->getNode("limit-deg", true);
179 _radar_ref_rng_node = _Instrument->getNode("reference-range-nm", true);
180 _radar_hdg_marker_node = _Instrument->getNode("heading-marker", true);
182 SGPropertyNode *n = _Instrument->getNode("display-controls", true);
183 _radar_weather_node = n->getNode("WX", true);
184 _radar_position_node = n->getNode("pos", true);
185 _radar_data_node = n->getNode("data", true);
186 _radar_symbol_node = n->getNode("symbol", true);
187 _radar_centre_node = n->getNode("centre", true);
188 _radar_rotate_node = n->getNode("rotate", true);
189 _radar_tcas_node = n->getNode("tcas", true);
190 _radar_absalt_node = n->getNode("abs-altitude", true);
192 _radar_centre_node->setBoolValue(false);
193 if (!_radar_coverage_node->hasValue())
194 _radar_coverage_node->setFloatValue(120);
195 if (!_radar_ref_rng_node->hasValue())
196 _radar_ref_rng_node->setDoubleValue(35);
197 if (!_radar_hdg_marker_node->hasValue())
198 _radar_hdg_marker_node->setBoolValue(true);
203 // OSG geometry setup. The polygons for the radar returns will be
204 // stored in a single Geometry. The geometry will have several
205 // primitive sets so we can have different kinds of polys and
206 // choose a different overall color for each set.
207 _radarGeode = new osg::Geode;
208 osg::StateSet *stateSet = _radarGeode->getOrCreateStateSet();
209 stateSet->setTextureAttributeAndModes(0, _wxEcho.get());
210 _geom = new osg::Geometry;
211 _geom->setUseDisplayList(false);
212 // Initially allocate space for 128 quads
213 _vertices = new osg::Vec2Array;
214 _vertices->setDataVariance(osg::Object::DYNAMIC);
215 _vertices->reserve(128 * 4);
216 _geom->setVertexArray(_vertices);
217 _texCoords = new osg::Vec2Array;
218 _texCoords->setDataVariance(osg::Object::DYNAMIC);
219 _texCoords->reserve(128 * 4);
220 _geom->setTexCoordArray(0, _texCoords);
221 osg::Vec3Array *colors = new osg::Vec3Array;
222 colors->push_back(osg::Vec3(1.0f, 1.0f, 1.0f)); // color of echos
223 colors->push_back(osg::Vec3(1.0f, 0.0f, 0.0f)); // arc mask
224 colors->push_back(osg::Vec3(0.0f, 0.0f, 0.0f)); // rest of mask
225 _geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
226 _geom->setColorArray(colors);
227 osg::PrimitiveSet *pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
228 pset->setDataVariance(osg::Object::DYNAMIC);
229 _geom->addPrimitiveSet(pset);
230 pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
231 pset->setDataVariance(osg::Object::DYNAMIC);
232 _geom->addPrimitiveSet(pset);
233 pset = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES);
234 pset->setDataVariance(osg::Object::DYNAMIC);
235 _geom->addPrimitiveSet(pset);
236 _geom->setInitialBound(osg::BoundingBox(osg::Vec3f(-256.0f, -256.0f, 0.0f),
237 osg::Vec3f(256.0f, 256.0f, 0.0f)));
238 _radarGeode->addDrawable(_geom);
240 // Texture in the 2D panel system
241 FGTextureManager::addTexture(_texture_path.c_str(), _odg->getTexture());
243 _textGeode = new osg::Geode;
245 osg::Camera *camera = _odg->getCamera();
246 camera->addChild(_radarGeode.get());
247 camera->addChild(_textGeode.get());
253 // Local coordinates for each echo
254 const osg::Vec3f echoCoords[4] = {
255 osg::Vec3f(-.7f, -.7f, 0.0f), osg::Vec3f(.7f, -.7f, 0.0f),
256 osg::Vec3f(.7f, .7f, 0.0f), osg::Vec3f(-.7f, .7f, 0.0f)
260 const osg::Vec2f echoTexCoords[4] = {
261 osg::Vec2f(0.0f, 0.0f), osg::Vec2f(UNIT, 0.0f),
262 osg::Vec2f(UNIT, UNIT), osg::Vec2f(0.0f, UNIT)
268 addQuad(osg::Vec2Array *vertices, osg::Vec2Array *texCoords,
269 const osg::Matrixf& transform, const osg::Vec2f& texBase)
271 for (int i = 0; i < 4; i++) {
272 const osg::Vec3f coords = transform.preMult(echoCoords[i]);
273 texCoords->push_back(texBase + echoTexCoords[i]);
274 vertices->push_back(osg::Vec2f(coords.x(), coords.y()));
279 // Rotate by a heading value
281 osg::Matrixf wxRotate(float angle)
283 return osg::Matrixf::rotate(angle, 0.0f, 0.0f, -1.0f);
288 wxRadarBg::update (double delta_time_sec)
290 if (!_sim_init_done) {
291 if (!fgGetBool("sim/sceneryloaded", false))
294 _sim_init_done = true;
296 if (!_odg || !_serviceable_node->getBoolValue()) {
297 _Instrument->setStringValue("status", "");
300 _time += delta_time_sec;
301 if (_time < _interval){
302 // cout << "WXradar update too soon " << _time << endl;
305 // cout << "WXradar updating" << _time<< endl;
309 string mode = _Instrument->getStringValue("display-mode", "arc");
311 if (_display_mode != MAP) {
315 } else if (mode == "plan") {
316 _display_mode = PLAN;}
317 else if (mode == "bscan") {
318 _display_mode = BSCAN;
323 string switchKnob = _Instrument->getStringValue("switch", "on");
324 if (switchKnob == "off") {
325 _Instrument->setStringValue("status", "");
326 } else if (switchKnob == "stby") {
327 _Instrument->setStringValue("status", "STBY");
328 } else if (switchKnob == "tst") {
329 _Instrument->setStringValue("status", "TST");
330 // find something interesting to do...
332 float r = _Instrument->getFloatValue("range", 40.0);
333 if (r != _range_nm) {
338 _radar_ref_rng = _radar_ref_rng_node->getDoubleValue();
339 _view_heading = fgGetDouble("/orientation/heading-deg") * SG_DEGREES_TO_RADIANS;
340 _centerTrans.makeTranslate(0.0f, 0.0f, 0.0f);
342 _scale = 200.0 / _range_nm;
345 if (_display_mode == ARC) {
346 _scale = 2*200.0f / _range_nm;
347 _angle_offset = -_view_heading;
348 _centerTrans.makeTranslate(0.0f, -200.0f, 0.0f);
350 } else if (_display_mode == MAP) {
353 bool centre = _radar_centre_node->getBoolValue();
356 _radar_centre_node->setBoolValue(false);
359 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: displacement "
360 // << _x_offset <<", "<<_y_offset
361 // << " user_speed_east_fps * SG_FPS_TO_KT "
362 // << user_speed_east_fps * SG_FPS_TO_KT
363 // << " user_speed_north_fps * SG_FPS_TO_KT "
364 // << user_speed_north_fps * SG_FPS_TO_KT
365 // << " dt " << delta_time_sec);
367 _centerTrans.makeTranslate(_x_offset, _y_offset, 0.0f);
369 } else if (_display_mode == PLAN) {
370 if (_radar_rotate_node->getBoolValue()) {
371 _angle_offset = -_view_heading;
373 } else if (_display_mode == BSCAN) {
374 _angle_offset = -_view_heading;
381 _textGeode->removeDrawables(0, _textGeode->getNumDrawables());
384 //TODO FIXME Mask below (only used for ARC mode) isn't properly aligned, i.e.
385 // it assumes the a/c position at the center of the display - though it's somewhere at
386 // bottom part for ARC mode.
387 // The mask hadn't worked at all for a while (probably since the OSG port) due to
388 // another bug (which is fixed now). Now, the mask is disabled completely until s.o.
389 // adapted the coordinates below. And the mask is only really useful to limit displayed
390 // weather blobs (not support yet).
391 // Aircraft echos are already limited properly through wxradar's "limit-deg" property.
393 osg::DrawArrays *maskPSet
394 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(1));
395 osg::DrawArrays *trimaskPSet
396 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(2));
398 if (_display_mode == ARC) {
399 // erase what is out of sight of antenna
409 float xOffset = 256.0f;
410 float yOffset = 200.0f;
412 int firstQuadVert = _vertices->size();
413 _texCoords->push_back(osg::Vec2f(0.5f, 0.25f));
414 _vertices->push_back(osg::Vec2f(-xOffset, 0.0 + yOffset));
415 _texCoords->push_back(osg::Vec2f(1.0f, 0.25f));
416 _vertices->push_back(osg::Vec2f(xOffset, 0.0 + yOffset));
417 _texCoords->push_back(osg::Vec2f(1.0f, 0.5f));
418 _vertices->push_back(osg::Vec2f(xOffset, 256.0 + yOffset));
419 _texCoords->push_back(osg::Vec2f(0.5f, 0.5f));
420 _vertices->push_back(osg::Vec2f(-xOffset, 256.0 + yOffset));
421 maskPSet->set(osg::PrimitiveSet::QUADS, firstQuadVert, 4);
424 // The triangles aren't supposed to be textured, but there's
425 // no need to set up a different Geometry, switch modes,
426 // etc. I happen to know that there's a white pixel in the
427 // texture at 1.0, 0.0 :)
428 float centerY = tan(30 * SG_DEGREES_TO_RADIANS);
429 _vertices->push_back(osg::Vec2f(0.0, 0.0));
430 _vertices->push_back(osg::Vec2f(-256.0, 0.0));
431 _vertices->push_back(osg::Vec2f(-256.0, 256.0 * centerY));
433 _vertices->push_back(osg::Vec2f(0.0, 0.0));
434 _vertices->push_back(osg::Vec2f(256.0, 0.0));
435 _vertices->push_back(osg::Vec2f(256.0, 256.0 * centerY));
437 _vertices->push_back(osg::Vec2f(-256, 0.0));
438 _vertices->push_back(osg::Vec2f(256.0, 0.0));
439 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
441 _vertices->push_back(osg::Vec2f(256, 0.0));
442 _vertices->push_back(osg::Vec2f(256.0, -256.0));
443 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
445 const osg::Vec2f whiteSpot(1.0f, 0.0f);
446 for (int i = 0; i < 3 * 4; i++)
447 _texCoords->push_back(whiteSpot);
449 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, firstQuadVert, 3 * 4);
453 maskPSet->set(osg::PrimitiveSet::QUADS, 0, 0);
454 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, 0, 0);
458 trimaskPSet->dirty();
462 // remember index of next vertex
463 int vIndex = _vertices->size();
467 osg::DrawArrays *quadPSet
468 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(0));
472 update_heading_marker();
474 // draw all new vertices are quads
475 quadPSet->set(osg::PrimitiveSet::QUADS, vIndex, _vertices->size()-vIndex);
482 wxRadarBg::update_weather()
484 string modeButton = _Instrument->getStringValue("mode", "WX");
485 // FIXME: implementation of radar echoes missing
486 // _radarEchoBuffer = *sgEnviro.get_radar_echo();
488 // pretend we have a scan angle bigger then the FOV
489 // TODO:check real fov, enlarge if < nn, and do clipping if > mm
490 // const float fovFactor = 1.45f;
491 _Instrument->setStringValue("status", modeButton.c_str());
493 // FIXME: implementation of radar echoes missing
495 list_of_SGWxRadarEcho *radarEcho = &_radarEchoBuffer;
496 list_of_SGWxRadarEcho::iterator iradarEcho, end = radarEcho->end();
497 const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
499 // draw the cloud radar echo
500 bool drawClouds = _radar_weather_node->getBoolValue();
503 // we do that in 3 passes, one for each color level
504 // this is to 'merge' same colors together
505 for (int level = 0; level <= 2; level++) {
506 float col = level * UNIT;
508 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
509 int cloudId = iradarEcho->cloudId;
510 bool upgrade = (cloudId >> 5) & 1;
511 float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
514 if (iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
517 if (iradarEcho->lightning || lwc < LWClevel[level])
520 float radius = sqrt(iradarEcho->dist) * SG_METER_TO_NM * _scale;
521 float size = iradarEcho->radius * 2.0 * SG_METER_TO_NM * _scale;
523 if (radius - size > 180)
526 float angle = (iradarEcho->heading - _angle_offset) //* fovFactor
529 // Rotate echo into position, and rotate echo to have
530 // a constant orientation towards the
531 // airplane. Compass headings increase in clockwise
532 // direction, while graphics rotations follow
533 // right-hand (counter-clockwise) rule.
534 const osg::Vec2f texBase(col, (UNIT * (float) (4 + (cloudId & 3))));
536 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
537 * osg::Matrixf::translate(0.0f, radius, 0.0f)
538 * wxRotate(angle) * _centerTrans);
539 addQuad(_vertices, _texCoords, m, texBase);
541 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing clouds"
542 // << " ID=" << cloudId
545 // << " radius=" << radius
546 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
547 // << " heading=" << iradarEcho->heading * SG_RADIANS_TO_DEGREES
548 // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
553 // draw lightning echos
554 bool drawLightning = _Instrument->getBoolValue("lightning", true);
556 const osg::Vec2f texBase(3 * UNIT, 4 * UNIT);
558 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
559 if (!iradarEcho->lightning)
562 float size = UNIT * 0.5f;
563 float radius = iradarEcho->dist * _scale;
564 float angle = iradarEcho->heading * SG_DEGREES_TO_RADIANS
567 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
569 * osg::Matrixf::translate(0.0f, radius, 0.0f)
570 * wxRotate(angle) * _centerTrans);
571 addQuad(_vertices, _texCoords, m, texBase);
579 wxRadarBg::update_data(const SGPropertyNode *ac, double altitude, double heading,
580 double radius, double bearing, bool selected)
582 osgText::Text *callsign = new osgText::Text;
583 callsign->setFont(_font.get());
584 callsign->setFontResolution(12, 12);
585 callsign->setCharacterSize(_font_size);
586 callsign->setColor(selected ? osg::Vec4(1, 1, 1, 1) : _font_color);
587 osg::Matrixf m(wxRotate(-bearing)
588 * osg::Matrixf::translate(0.0f, radius, 0.0f)
589 * wxRotate(bearing) * _centerTrans);
591 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
592 // cast to int's, otherwise text comes out ugly
593 callsign->setPosition(osg::Vec3((int)pos.x(), (int)pos.y(), 0));
594 callsign->setAlignment(osgText::Text::LEFT_BOTTOM_BASE_LINE);
595 callsign->setLineSpacing(_font_spacing);
597 const char *identity = ac->getStringValue("transponder-id");
599 identity = ac->getStringValue("callsign");
602 text << identity << endl
603 << setprecision(0) << fixed
604 << setw(3) << setfill('0') << heading * SG_RADIANS_TO_DEGREES << "\xB0 "
605 << setw(0) << altitude << "ft" << endl
606 << ac->getDoubleValue("velocities/true-airspeed-kt") << "kts";
608 callsign->setText(text.str());
609 _textGeode->addDrawable(callsign);
614 wxRadarBg::update_aircraft()
617 double age_factor = 1.0;
625 if (!ground_echoes.empty()){
626 ground_echoes_iterator = ground_echoes.begin();
628 while(ground_echoes_iterator != ground_echoes.end()) {
629 diff = _elapsed_time - (*ground_echoes_iterator)->elapsed_time;
631 if( diff > _persistance) {
632 ground_echoes.erase(ground_echoes_iterator++);
634 // double test_brg = (*ground_echoes_iterator)->bearing;
635 // double bearing = test_brg * SG_DEGREES_TO_RADIANS;
636 // float angle = calcRelBearing(bearing, _view_heading);
637 double bumpinessFactor = (*ground_echoes_iterator)->bumpiness;
638 float heading = fgGetDouble("/orientation/heading-deg");
639 if ( _display_mode == BSCAN ){
640 test_rng = (*ground_echoes_iterator)->elevation * 6;
641 test_brg = (*ground_echoes_iterator)->bearing;
642 angle = calcRelBearingDeg(test_brg, heading) * 6;
643 range = sqrt(test_rng * test_rng + angle * angle);
644 bearing = atan2(angle, test_rng);
645 //cout << "angle " << angle <<" bearing "
646 // << bearing / SG_DEGREES_TO_RADIANS << endl;
647 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 240 * age_factor;
649 test_rng = (*ground_echoes_iterator)->range;
650 range = test_rng * SG_METER_TO_NM;
651 test_brg = (*ground_echoes_iterator)->bearing;
652 bearing = test_brg * SG_DEGREES_TO_RADIANS;
653 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 120 * age_factor;
654 bearing += _angle_offset;
657 float radius = range * _scale;
658 //double heading = 90 * SG_DEGREES_TO_RADIANS;
659 //heading += _angle_offset;
664 age_factor = 1 - (0.5 * diff/_persistance);
666 float size = echo_radius * UNIT;
668 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
669 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
670 * osg::Matrixf::translate(0.0f, radius, 0.0f)
671 * wxRotate(bearing) * _centerTrans);
672 addQuad(_vertices, _texCoords, m, texBase);
674 ++ground_echoes_iterator;
676 //cout << "test bearing " << test_brg
677 //<< " test_rng " << test_rng * SG_METER_TO_NM
678 //<< " persistance " << _persistance
685 if (!_ai_enabled_node->getBoolValue())
688 bool draw_tcas = _radar_tcas_node->getBoolValue();
689 bool draw_absolute = _radar_absalt_node->getBoolValue();
690 bool draw_echoes = _radar_position_node->getBoolValue();
691 bool draw_symbols = _radar_symbol_node->getBoolValue();
692 bool draw_data = _radar_data_node->getBoolValue();
693 if (!draw_echoes && !draw_symbols && !draw_data)
696 double user_lat = _user_lat_node->getDoubleValue();
697 double user_lon = _user_lon_node->getDoubleValue();
698 double user_alt = _user_alt_node->getDoubleValue();
700 float limit = _radar_coverage_node->getFloatValue();
705 limit *= SG_DEGREES_TO_RADIANS;
707 int selected_id = fgGetInt("/instrumentation/radar/selected-id", -1);
709 const SGPropertyNode *selected_ac = 0;
710 const SGPropertyNode *ai = fgGetNode("/ai/models", true);
712 for (int i = ai->nChildren() - 1; i >= -1; i--) {
713 const SGPropertyNode *model;
715 if (i < 0) { // last iteration: selected model
718 model = ai->getChild(i);
719 if (!model->nChildren())
721 if ((model->getIntValue("id") == selected_id)&&
723 selected_ac = model; // save selected model for last iteration
730 double echo_radius, sigma;
731 const string name = model->getName();
733 //cout << "name "<<name << endl;
734 if (name == "aircraft" || name == "tanker")
735 echo_radius = 1, sigma = 1;
736 else if (name == "multiplayer" || name == "wingman" || name == "static")
737 echo_radius = 1.5, sigma = 1;
738 else if (name == "ship" || name == "carrier" || name == "escort" ||name == "storm")
739 echo_radius = 1.5, sigma = 100;
740 else if (name == "thermal")
741 echo_radius = 2, sigma = 100;
742 else if (name == "rocket")
743 echo_radius = 0.1, sigma = 0.1;
744 else if (name == "ballistic")
745 echo_radius = 0.001, sigma = 0.001;
749 double lat = model->getDoubleValue("position/latitude-deg");
750 double lon = model->getDoubleValue("position/longitude-deg");
751 double alt = model->getDoubleValue("position/altitude-ft");
752 double heading = model->getDoubleValue("orientation/true-heading-deg");
754 double range, bearing;
755 calcRangeBearing(user_lat, user_lon, lat, lon, range, bearing);
756 //cout << _antenna_ht << _interval<< endl;
757 bool isVisible = withinRadarHorizon(user_alt, alt, range);
762 if (!inRadarRange(sigma, range))
765 bearing *= SG_DEGREES_TO_RADIANS;
766 heading *= SG_DEGREES_TO_RADIANS;
768 float radius = range * _scale;
769 float angle = calcRelBearing(bearing, _view_heading);
771 if (angle > limit || angle < -limit)
774 bearing += _angle_offset;
775 heading += _angle_offset;
777 bool is_tcas_contact = false;
780 is_tcas_contact = update_tcas(model,range,user_alt,alt,bearing,radius,draw_absolute);
784 if (draw_echoes && (!is_tcas_contact)) {
785 float size = echo_radius * 120 * UNIT;
787 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
788 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
789 * osg::Matrixf::translate(0.0f, radius, 0.0f)
790 * wxRotate(bearing) * _centerTrans);
791 addQuad(_vertices, _texCoords, m, texBase);
795 if (draw_symbols && (!draw_tcas)) {
796 const osg::Vec2f texBase(0, 3 * UNIT);
797 float size = 600 * UNIT;
798 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
799 * wxRotate(heading - bearing)
800 * osg::Matrixf::translate(0.0f, radius, 0.0f)
801 * wxRotate(bearing) * _centerTrans);
802 addQuad(_vertices, _texCoords, m, texBase);
805 if ((draw_data || i < 0)&& // selected one (i == -1) is always drawn
806 ((!draw_tcas)||(is_tcas_contact)||(draw_echoes)))
807 update_data(model, alt, heading, radius, bearing, i < 0);
811 /** Update TCAS display.
812 * Return true when processed as TCAS contact, false otherwise. */
814 wxRadarBg::update_tcas(const SGPropertyNode *model,double range,double user_alt,double alt,
815 double bearing,double radius,bool absMode)
819 // update TCAS symbol
821 threatLevel = model->getIntValue("tcas/threat-level",-1);
822 if (threatLevel == -1)
824 // no TCAS information (i.e. no transponder) => not visible to TCAS
827 int row = 7 - threatLevel;
829 double vspeed = model->getDoubleValue("velocities/vertical-speed-fps");
830 if (vspeed < -3.0) // descending
833 if (vspeed > 3.0) // climbing
835 texBase = osg::Vec2f(col*UNIT,row * UNIT);
836 float size = 200 * UNIT;
837 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
839 * osg::Matrixf::translate(0.0f, radius, 0.0f)
840 * wxRotate(bearing) * _centerTrans);
841 addQuad(_vertices, _texCoords, m, texBase);
846 osgText::Text *altStr = new osgText::Text;
847 altStr->setFont(_font.get());
848 altStr->setFontResolution(12, 12);
849 altStr->setCharacterSize(_font_size);
850 altStr->setColor(_tcas_colors[threatLevel]);
851 osg::Matrixf m(wxRotate(-bearing)
852 * osg::Matrixf::translate(0.0f, radius, 0.0f)
853 * wxRotate(bearing) * _centerTrans);
855 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
856 // cast to int's, otherwise text comes out ugly
857 altStr->setLineSpacing(_font_spacing);
860 altStr->setAlignment(osgText::Text::LEFT_CENTER);
861 int altDif = (alt-user_alt+50)/100;
876 altStr->setPosition(osg::Vec3((int)pos.x()-30, (int)pos.y()+dy, 0));
879 // absolute altitude display
880 text << setprecision(0) << fixed
881 << setw(3) << setfill('0') << alt/100 << endl;
883 else // relative altitude display
887 << setprecision(0) << fixed
888 << setw(2) << setfill('0') << altDif << endl;
891 altStr->setText(text.str());
892 _textGeode->addDrawable(altStr);
899 wxRadarBg::update_tacan()
902 int mode = _radar_mode_control_node->getIntValue();
903 bool inRange = _tacan_in_range_node->getBoolValue();
905 if (mode != 1 || !inRange)
908 float size = 600 * UNIT;
909 float radius = _tacan_distance_node->getFloatValue() * _scale;
910 float angle = _tacan_bearing_node->getFloatValue() * SG_DEGREES_TO_RADIANS
913 const osg::Vec2f texBase(1 * UNIT, 3 * UNIT);
914 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
916 * osg::Matrixf::translate(0.0f, radius, 0.0f)
917 * wxRotate(angle) * _centerTrans);
918 addQuad(_vertices, _texCoords, m, texBase);
920 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing TACAN"
921 // << " dist=" << radius
922 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
923 // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
924 // << " x=" << x << " y="<< y
925 // << " size=" << size);
930 wxRadarBg::update_heading_marker()
932 if (!_radar_hdg_marker_node->getBoolValue())
935 const osg::Vec2f texBase(2 * UNIT, 3 * UNIT);
936 float size = 600 * UNIT;
937 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
938 * wxRotate(_view_heading + _angle_offset));
941 addQuad(_vertices, _texCoords, m, texBase);
943 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing heading marker"
944 // << " x,y " << x <<","<< y
945 // << " dist" << dist
946 // << " view_heading" << _view_heading * SG_RADIANS_TO_DEGREES
947 // << " heading " << iradarEcho->heading * SG_RADIANS_TO_DEGREES
948 // << " angle " << angle * SG_RADIANS_TO_DEGREES);
953 wxRadarBg::center_map()
955 _lat = _user_lat_node->getDoubleValue();
956 _lon = _user_lon_node->getDoubleValue();
957 _x_offset = _y_offset = 0;
962 wxRadarBg::apply_map_offset()
964 double lat = _user_lat_node->getDoubleValue();
965 double lon = _user_lon_node->getDoubleValue();
966 double bearing, distance, az2;
967 geo_inverse_wgs_84(_lat, _lon, lat, lon, &bearing, &az2, &distance);
968 distance *= SG_METER_TO_NM * _scale;
969 bearing *= SG_DEGREES_TO_RADIANS;
970 _x_offset += sin(bearing) * distance;
971 _y_offset += cos(bearing) * distance;
978 wxRadarBg::withinRadarHorizon(double user_alt, double alt, double range_nm)
980 // Radar Horizon = 1.23(ht^1/2 + hr^1/2),
981 //don't allow negative altitudes (an approximation - yes altitudes can be negative)
982 // Allow antenna ht to be set, but only on ground
983 _antenna_ht = _Instrument->getDoubleValue("antenna-ht-ft");
986 user_alt = _antenna_ht;
989 alt = 0; // to allow some vertical extent of target
991 double radarhorizon = 1.23 * (sqrt(alt) + sqrt(user_alt));
992 // SG_LOG(SG_INSTR, SG_ALERT, "Radar: radar horizon " << radarhorizon);
993 return radarhorizon >= range_nm;
998 wxRadarBg::inRadarRange(double sigma, double range_nm)
1000 //The Radar Equation:
1002 // MaxRange^4 = (TxPower * AntGain^2 * lambda^2 * sigma)/((constant) * MDS)
1004 // Where (constant) = (4*pi)3 and MDS is the Minimum Detectable Signal power.
1006 // For a given radar we can assume that the only variable is sigma,
1007 // the target radar cross section.
1009 // Here, we will use a normalised rcs (sigma) for a standard taget and assume that this
1010 // will provide a maximum range of 35nm;
1012 // TODO - make the maximum range adjustable at runtime
1014 double constant = _radar_ref_rng;
1019 double maxrange = constant * pow(sigma, 0.25);
1020 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: max range " << maxrange);
1021 return maxrange >= range_nm;
1026 wxRadarBg::calcRangeBearing(double lat, double lon, double lat2, double lon2,
1027 double &range, double &bearing) const
1029 // calculate the bearing and range of the second pos from the first
1030 double az2, distance;
1031 geo_inverse_wgs_84(lat, lon, lat2, lon2, &bearing, &az2, &distance);
1032 range = distance *= SG_METER_TO_NM;
1037 wxRadarBg::calcRelBearing(float bearing, float heading)
1039 float angle = bearing - heading;
1042 angle -= 2.0 * SG_PI;
1045 angle += 2.0 * SG_PI;
1051 wxRadarBg::calcRelBearingDeg(float bearing, float heading)
1053 float angle = bearing - heading;
1056 return angle -= 360;
1059 return angle += 360;
1066 wxRadarBg::updateFont()
1068 float red = _font_node->getFloatValue("color/red");
1069 float green = _font_node->getFloatValue("color/green");
1070 float blue = _font_node->getFloatValue("color/blue");
1071 float alpha = _font_node->getFloatValue("color/alpha");
1072 _font_color.set(red, green, blue, alpha);
1074 _font_size = _font_node->getFloatValue("size");
1075 _font_spacing = _font_size * _font_node->getFloatValue("line-spacing");
1076 string path = _font_node->getStringValue("name", DEFAULT_FONT);
1079 if (path[0] != '/') {
1080 tpath = globals->get_fg_root();
1081 tpath.append("Fonts");
1087 #if (FG_OSG_VERSION >= 21000)
1088 osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
1089 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str(), fontOptions.get());
1091 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str());
1096 _font->setMinFilterHint(osg::Texture::NEAREST);
1097 _font->setMagFilterHint(osg::Texture::NEAREST);
1098 _font->setGlyphImageMargin(0);
1099 _font->setGlyphImageMarginRatio(0);
1102 for (int i=0;i<4;i++)
1104 const float defaultColors[4][3] = {{0,1,1},{0,1,1},{1,0.5,0},{1,0,0}};
1105 SGPropertyNode_ptr color_node = _font_node->getNode("tcas/color",i,true);
1106 float red = color_node->getFloatValue("red",defaultColors[i][0]);
1107 float green = color_node->getFloatValue("green",defaultColors[i][1]);
1108 float blue = color_node->getFloatValue("blue",defaultColors[i][2]);
1109 float alpha = color_node->getFloatValue("alpha",1);
1110 _tcas_colors[i]=osg::Vec4(red, green, blue, alpha);
1115 wxRadarBg::valueChanged(SGPropertyNode*)