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/environment/visual_enviro.hxx>
42 #include <simgear/scene/model/model.hxx>
43 #include <simgear/structure/exception.hxx>
44 #include <simgear/misc/sg_path.hxx>
45 #include <simgear/math/sg_geodesy.hxx>
49 using std::stringstream;
51 using std::setprecision;
56 #include <Main/fg_props.hxx>
57 #include <Main/globals.hxx>
58 #include <Cockpit/panel.hxx>
59 #include <Cockpit/hud.hxx>
61 #include <Include/general.hxx>
62 #include "instrument_mgr.hxx"
63 #include "od_gauge.hxx"
64 #include "wxradar.hxx"
66 #include <iostream> // for cout, endl
71 static const float UNIT = 1.0f / 8.0f; // 8 symbols in a row/column in the texture
72 static const char *DEFAULT_FONT = "typewriter.txf";
75 wxRadarBg::wxRadarBg(SGPropertyNode *node) :
76 _name(node->getStringValue("name", "radar")),
77 _num(node->getIntValue("number", 0)),
79 _interval(node->getDoubleValue("update-interval-sec", 1.0)),
80 _sim_init_done(false),
82 _last_switchKnob("off"),
83 _antenna_ht(node->getDoubleValue("antenna-ht-ft", 0.0)),
88 branch = "/instrumentation/" + _name;
89 _Instrument = fgGetNode(branch.c_str(), _num, true);
91 const char *tacan_source = node->getStringValue("tacan-source", "/instrumentation/tacan");
92 _Tacan = fgGetNode(tacan_source, true);
94 _font_node = _Instrument->getNode("font", true);
96 #define INITFONT(p, val, type) if (!_font_node->hasValue(p)) _font_node->set##type##Value(p, val)
97 INITFONT("name", DEFAULT_FONT, String);
98 INITFONT("size", 8, Float);
99 INITFONT("line-spacing", 0.25, Float);
100 INITFONT("color/red", 0, Float);
101 INITFONT("color/green", 0.8, Float);
102 INITFONT("color/blue", 0, Float);
103 INITFONT("color/alpha", 1, Float);
106 _font_node->addChangeListener(this, true);
110 wxRadarBg::~wxRadarBg ()
112 _font_node->removeChangeListener(this);
119 _serviceable_node = _Instrument->getNode("serviceable", true);
121 // texture name to use in 2D and 3D instruments
122 _texture_path = _Instrument->getStringValue("radar-texture-path",
123 "Aircraft/Instruments/Textures/od_wxradar.rgb");
124 _resultTexture = FGTextureManager::createTexture(_texture_path.c_str(), false);
126 SGPath tpath(globals->get_fg_root());
127 string path = _Instrument->getStringValue("echo-texture-path",
128 "Aircraft/Instruments/Textures/wxecho.rgb");
131 // no mipmap or else alpha will mix with pixels on the border of shapes, ruining the effect
132 _wxEcho = SGLoadTexture2D(tpath, false, false);
135 _Instrument->setFloatValue("trk", 0.0);
136 _Instrument->setFloatValue("tilt", 0.0);
137 _Instrument->setStringValue("status", "");
138 // those properties are used by a radar instrument of a MFD
139 // input switch = OFF | TST | STBY | ON
140 // input mode = WX | WXA | MAP
141 // output status = STBY | TEST | WX | WXA | MAP | blank
142 // input lightning = true | false
143 // input TRK = +/- n degrees
144 // input TILT = +/- n degree
145 // input autotilt = true | false
146 // input range = n nm (20/40/80)
147 // input display-mode = arc | rose | map | plan
149 FGInstrumentMgr *imgr = (FGInstrumentMgr *)globals->get_subsystem("instrumentation");
150 _odg = (FGODGauge *)imgr->get_subsystem("od_gauge");
153 _ai_enabled_node = fgGetNode("/sim/ai/enabled", true);
155 _user_lat_node = fgGetNode("/position/latitude-deg", true);
156 _user_lon_node = fgGetNode("/position/longitude-deg", true);
157 _user_alt_node = fgGetNode("/position/altitude-ft", true);
159 _user_speed_east_fps_node = fgGetNode("/velocities/speed-east-fps", true);
160 _user_speed_north_fps_node = fgGetNode("/velocities/speed-north-fps", true);
162 _tacan_serviceable_node = _Tacan->getNode("serviceable", true);
163 _tacan_distance_node = _Tacan->getNode("indicated-distance-nm", true);
164 _tacan_name_node = _Tacan->getNode("name", true);
165 _tacan_bearing_node = _Tacan->getNode("indicated-bearing-true-deg", true);
166 _tacan_in_range_node = _Tacan->getNode("in-range", true);
168 _radar_mode_control_node = _Instrument->getNode("mode-control", true);
169 _radar_coverage_node = _Instrument->getNode("limit-deg", true);
170 _radar_ref_rng_node = _Instrument->getNode("reference-range-nm", true);
171 _radar_hdg_marker_node = _Instrument->getNode("heading-marker", true);
173 SGPropertyNode *n = _Instrument->getNode("display-controls", true);
174 _radar_weather_node = n->getNode("WX", true);
175 _radar_position_node = n->getNode("pos", true);
176 _radar_data_node = n->getNode("data", true);
177 _radar_symbol_node = n->getNode("symbol", true);
178 _radar_centre_node = n->getNode("centre", true);
179 _radar_rotate_node = n->getNode("rotate", true);
181 _radar_centre_node->setBoolValue(false);
182 if (!_radar_coverage_node->hasValue())
183 _radar_coverage_node->setFloatValue(120);
184 if (!_radar_ref_rng_node->hasValue())
185 _radar_ref_rng_node->setDoubleValue(35);
186 if (!_radar_hdg_marker_node->hasValue())
187 _radar_hdg_marker_node->setBoolValue(true);
192 // OSG geometry setup. The polygons for the radar returns will be
193 // stored in a single Geometry. The geometry will have several
194 // primitive sets so we can have different kinds of polys and
195 // choose a different overall color for each set.
196 _radarGeode = new osg::Geode;
197 osg::StateSet *stateSet = _radarGeode->getOrCreateStateSet();
198 stateSet->setTextureAttributeAndModes(0, _wxEcho.get());
199 _geom = new osg::Geometry;
200 _geom->setUseDisplayList(false);
201 // Initially allocate space for 128 quads
202 _vertices = new osg::Vec2Array;
203 _vertices->setDataVariance(osg::Object::DYNAMIC);
204 _vertices->reserve(128 * 4);
205 _geom->setVertexArray(_vertices);
206 _texCoords = new osg::Vec2Array;
207 _texCoords->setDataVariance(osg::Object::DYNAMIC);
208 _texCoords->reserve(128 * 4);
209 _geom->setTexCoordArray(0, _texCoords);
210 osg::Vec3Array *colors = new osg::Vec3Array;
211 colors->push_back(osg::Vec3(1.0f, 1.0f, 1.0f)); // color of echos
212 colors->push_back(osg::Vec3(1.0f, 0.0f, 0.0f)); // arc mask
213 colors->push_back(osg::Vec3(0.0f, 0.0f, 0.0f)); // rest of mask
214 _geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
215 _geom->setColorArray(colors);
216 osg::PrimitiveSet *pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
217 pset->setDataVariance(osg::Object::DYNAMIC);
218 _geom->addPrimitiveSet(pset);
219 pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
220 pset->setDataVariance(osg::Object::DYNAMIC);
221 _geom->addPrimitiveSet(pset);
222 pset = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES);
223 pset->setDataVariance(osg::Object::DYNAMIC);
224 _geom->addPrimitiveSet(pset);
225 _geom->setInitialBound(osg::BoundingBox(osg::Vec3f(-256.0f, -256.0f, 0.0f),
226 osg::Vec3f(256.0f, 256.0f, 0.0f)));
227 _radarGeode->addDrawable(_geom);
229 // Texture in the 2D panel system
230 FGTextureManager::addTexture(_texture_path.c_str(), _odg->getTexture());
232 _textGeode = new osg::Geode;
234 osg::Camera *camera = _odg->getCamera();
235 camera->addChild(_radarGeode.get());
236 camera->addChild(_textGeode.get());
240 // Local coordinates for each echo
241 const osg::Vec3f echoCoords[4] = {
242 osg::Vec3f(-.7f, -.7f, 0.0f), osg::Vec3f(.7f, -.7f, 0.0f),
243 osg::Vec3f(.7f, .7f, 0.0f), osg::Vec3f(-.7f, .7f, 0.0f)
247 const osg::Vec2f echoTexCoords[4] = {
248 osg::Vec2f(0.0f, 0.0f), osg::Vec2f(UNIT, 0.0f),
249 osg::Vec2f(UNIT, UNIT), osg::Vec2f(0.0f, UNIT)
255 addQuad(osg::Vec2Array *vertices, osg::Vec2Array *texCoords,
256 const osg::Matrixf& transform, const osg::Vec2f& texBase)
258 for (int i = 0; i < 4; i++) {
259 const osg::Vec3f coords = transform.preMult(echoCoords[i]);
260 texCoords->push_back(texBase + echoTexCoords[i]);
261 vertices->push_back(osg::Vec2f(coords.x(), coords.y()));
266 // Rotate by a heading value
268 osg::Matrixf wxRotate(float angle)
270 return osg::Matrixf::rotate(angle, 0.0f, 0.0f, -1.0f);
275 wxRadarBg::update (double delta_time_sec)
277 if (!_sim_init_done) {
278 if (!fgGetBool("sim/sceneryloaded", false))
281 _sim_init_done = true;
283 if (!_odg || !_serviceable_node->getBoolValue()) {
284 _Instrument->setStringValue("status", "");
287 _time += delta_time_sec;
288 if (_time < _interval){
289 // cout << "WXradar update too soon " << _time << endl;
292 // cout << "WXradar updating" << _time<< endl;
296 string mode = _Instrument->getStringValue("display-mode", "arc");
298 if (_display_mode != MAP) {
302 } else if (mode == "plan") {
303 _display_mode = PLAN;}
304 else if (mode == "bscan") {
305 _display_mode = BSCAN;
310 string switchKnob = _Instrument->getStringValue("switch", "on");
311 if (_last_switchKnob != switchKnob) {
312 // since 3D models don't share textures with the rest of the world
313 // we must locate them and replace their handle by hand
314 // only do that when the instrument is turned on
315 //if (_last_switchKnob == "off")
316 //_odg->set_texture(_texture_path.c_str(), _resultTexture->getHandle());
318 _last_switchKnob = switchKnob;
321 if (switchKnob == "off") {
322 _Instrument->setStringValue("status", "");
323 } else if (switchKnob == "stby") {
324 _Instrument->setStringValue("status", "STBY");
325 } else if (switchKnob == "tst") {
326 _Instrument->setStringValue("status", "TST");
327 // find something interesting to do...
329 float r = _Instrument->getFloatValue("range", 40.0);
330 if (r != _range_nm) {
335 _radar_ref_rng = _radar_ref_rng_node->getDoubleValue();
336 _view_heading = get_heading() * SG_DEGREES_TO_RADIANS;
337 _centerTrans.makeTranslate(0.0f, 0.0f, 0.0f);
339 _scale = 200.0 / _range_nm;
342 if (_display_mode == ARC) {
343 _scale = 2*200.0f / _range_nm;
344 _angle_offset = -_view_heading;
345 _centerTrans.makeTranslate(0.0f, -200.0f, 0.0f);
347 } else if (_display_mode == MAP) {
350 bool centre = _radar_centre_node->getBoolValue();
353 _radar_centre_node->setBoolValue(false);
356 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: displacement "
357 // << _x_offset <<", "<<_y_offset
358 // << " user_speed_east_fps * SG_FPS_TO_KT "
359 // << user_speed_east_fps * SG_FPS_TO_KT
360 // << " user_speed_north_fps * SG_FPS_TO_KT "
361 // << user_speed_north_fps * SG_FPS_TO_KT
362 // << " dt " << delta_time_sec);
364 _centerTrans.makeTranslate(_x_offset, _y_offset, 0.0f);
366 } else if (_display_mode == PLAN) {
367 if (_radar_rotate_node->getBoolValue()) {
368 _angle_offset = -_view_heading;
370 } else if (_display_mode == BSCAN) {
371 _angle_offset = -_view_heading;
378 _textGeode->removeDrawables(0, _textGeode->getNumDrawables());
384 osg::DrawArrays *quadPSet
385 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(0));
386 quadPSet->set(osg::PrimitiveSet::QUADS, 0, _vertices->size());
389 // erase what is out of sight of antenna
400 osg::DrawArrays *maskPSet
401 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(1));
402 osg::DrawArrays *trimaskPSet
403 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(2));
405 if (_display_mode == ARC) {
406 float xOffset = 256.0f;
407 float yOffset = 200.0f;
409 int firstQuadVert = _vertices->size();
410 _texCoords->push_back(osg::Vec2f(0.5f, 0.25f));
411 _vertices->push_back(osg::Vec2f(-xOffset, 0.0 + yOffset));
412 _texCoords->push_back(osg::Vec2f(1.0f, 0.25f));
413 _vertices->push_back(osg::Vec2f(xOffset, 0.0 + yOffset));
414 _texCoords->push_back(osg::Vec2f(1.0f, 0.5f));
415 _vertices->push_back(osg::Vec2f(xOffset, 256.0 + yOffset));
416 _texCoords->push_back(osg::Vec2f(0.5f, 0.5f));
417 _vertices->push_back(osg::Vec2f(-xOffset, 256.0 + yOffset));
418 maskPSet->set(osg::PrimitiveSet::QUADS, firstQuadVert, 4);
420 // The triangles aren't supposed to be textured, but there's
421 // no need to set up a different Geometry, switch modes,
422 // etc. I happen to know that there's a white pixel in the
423 // texture at 1.0, 0.0 :)
424 float centerY = tan(30 * SG_DEGREES_TO_RADIANS);
425 _vertices->push_back(osg::Vec2f(0.0, 0.0));
426 _vertices->push_back(osg::Vec2f(-256.0, 0.0));
427 _vertices->push_back(osg::Vec2f(-256.0, 256.0 * centerY));
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(-256, 0.0));
434 _vertices->push_back(osg::Vec2f(256.0, 0.0));
435 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
437 _vertices->push_back(osg::Vec2f(256, 0.0));
438 _vertices->push_back(osg::Vec2f(256.0, -256.0));
439 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
441 const osg::Vec2f whiteSpot(1.0f, 0.0f);
442 for (int i = 0; i < 3 * 4; i++)
443 _texCoords->push_back(whiteSpot);
445 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, firstQuadVert + 4, 3 * 4);
448 maskPSet->set(osg::PrimitiveSet::QUADS, 0, 0);
449 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, 0, 0);
453 trimaskPSet->dirty();
461 update_heading_marker();
463 quadPSet->set(osg::PrimitiveSet::QUADS, 0, _vertices->size());
470 wxRadarBg::update_weather()
472 string modeButton = _Instrument->getStringValue("mode", "WX");
473 _radarEchoBuffer = *sgEnviro.get_radar_echo();
475 // pretend we have a scan angle bigger then the FOV
476 // TODO:check real fov, enlarge if < nn, and do clipping if > mm
477 // const float fovFactor = 1.45f;
478 _Instrument->setStringValue("status", modeButton.c_str());
480 list_of_SGWxRadarEcho *radarEcho = &_radarEchoBuffer;
481 list_of_SGWxRadarEcho::iterator iradarEcho, end = radarEcho->end();
482 const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
484 // draw the cloud radar echo
485 bool drawClouds = _radar_weather_node->getBoolValue();
488 // we do that in 3 passes, one for each color level
489 // this is to 'merge' same colors together
490 for (int level = 0; level <= 2; level++) {
491 float col = level * UNIT;
493 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
494 int cloudId = iradarEcho->cloudId;
495 bool upgrade = (cloudId >> 5) & 1;
496 float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
499 if (iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
502 if (iradarEcho->lightning || lwc < LWClevel[level])
505 float radius = sgSqrt(iradarEcho->dist) * SG_METER_TO_NM * _scale;
506 float size = iradarEcho->radius * 2.0 * SG_METER_TO_NM * _scale;
508 if (radius - size > 180)
511 float angle = (iradarEcho->heading - _angle_offset) //* fovFactor
514 // Rotate echo into position, and rotate echo to have
515 // a constant orientation towards the
516 // airplane. Compass headings increase in clockwise
517 // direction, while graphics rotations follow
518 // right-hand (counter-clockwise) rule.
519 const osg::Vec2f texBase(col, (UNIT * (float) (4 + (cloudId & 3))));
521 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
522 * osg::Matrixf::translate(0.0f, radius, 0.0f)
523 * wxRotate(angle) * _centerTrans);
524 addQuad(_vertices, _texCoords, m, texBase);
526 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing clouds"
527 // << " ID=" << cloudId
530 // << " radius=" << radius
531 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
532 // << " heading=" << iradarEcho->heading * SG_RADIANS_TO_DEGREES
533 // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
538 // draw lightning echos
539 bool drawLightning = _Instrument->getBoolValue("lightning", true);
541 const osg::Vec2f texBase(3 * UNIT, 4 * UNIT);
543 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
544 if (!iradarEcho->lightning)
547 float size = UNIT * 0.5f;
548 float radius = iradarEcho->dist * _scale;
549 float angle = iradarEcho->heading * SG_DEGREES_TO_RADIANS
552 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
554 * osg::Matrixf::translate(0.0f, radius, 0.0f)
555 * wxRotate(angle) * _centerTrans);
556 addQuad(_vertices, _texCoords, m, texBase);
563 wxRadarBg::update_data(const SGPropertyNode *ac, double altitude, double heading,
564 double radius, double bearing, bool selected)
566 osgText::Text *callsign = new osgText::Text;
567 callsign->setFont(_font.get());
568 callsign->setFontResolution(12, 12);
569 callsign->setCharacterSize(_font_size);
570 callsign->setColor(selected ? osg::Vec4(1, 1, 1, 1) : _font_color);
571 osg::Matrixf m(wxRotate(-bearing)
572 * osg::Matrixf::translate(0.0f, radius, 0.0f)
573 * wxRotate(bearing) * _centerTrans);
575 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
576 // cast to int's, otherwise text comes out ugly
577 callsign->setPosition(osg::Vec3((int)pos.x(), (int)pos.y(), 0));
578 callsign->setAlignment(osgText::Text::LEFT_BOTTOM_BASE_LINE);
579 callsign->setLineSpacing(_font_spacing);
581 const char *identity = ac->getStringValue("transponder-id");
583 identity = ac->getStringValue("callsign");
586 text << identity << endl
587 << setprecision(0) << fixed
588 << setw(3) << setfill('0') << heading * SG_RADIANS_TO_DEGREES << "\xB0 "
589 << setw(0) << altitude << "ft" << endl
590 << ac->getDoubleValue("velocities/true-airspeed-kt") << "kts";
592 callsign->setText(text.str());
593 _textGeode->addDrawable(callsign);
598 wxRadarBg::update_aircraft()
601 double age_factor = 1.0;
609 if (!ground_echoes.empty()){
610 ground_echoes_iterator = ground_echoes.begin();
612 while(ground_echoes_iterator != ground_echoes.end()) {
613 diff = _elapsed_time - (*ground_echoes_iterator)->elapsed_time;
615 if( diff > _persistance) {
616 ground_echoes.erase(ground_echoes_iterator);
618 // double test_brg = (*ground_echoes_iterator)->bearing;
619 // double bearing = test_brg * SG_DEGREES_TO_RADIANS;
620 // float angle = calcRelBearing(bearing, _view_heading);
621 double bumpinessFactor = (*ground_echoes_iterator)->bumpiness;
622 float heading = get_heading();
623 if ( _display_mode == BSCAN ){
624 test_rng = (*ground_echoes_iterator)->elevation * 6;
625 test_brg = (*ground_echoes_iterator)->bearing;
626 angle = calcRelBearingDeg(test_brg, heading) * 6;
627 range = sqrt(test_rng * test_rng + angle * angle);
628 bearing = atan2(angle, test_rng);
629 //cout << "angle " << angle <<" bearing "
630 // << bearing / SG_DEGREES_TO_RADIANS << endl;
631 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 240 * age_factor;
633 test_rng = (*ground_echoes_iterator)->range;
634 range = test_rng * SG_METER_TO_NM;
635 test_brg = (*ground_echoes_iterator)->bearing;
636 bearing = test_brg * SG_DEGREES_TO_RADIANS;
637 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 120 * age_factor;
638 bearing += _angle_offset;
641 float radius = range * _scale;
642 //double heading = 90 * SG_DEGREES_TO_RADIANS;
643 //heading += _angle_offset;
648 age_factor = 1 - (0.5 * diff/_persistance);
650 float size = echo_radius * UNIT;
652 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
653 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
654 * osg::Matrixf::translate(0.0f, radius, 0.0f)
655 * wxRotate(bearing) * _centerTrans);
656 addQuad(_vertices, _texCoords, m, texBase);
658 ++ground_echoes_iterator;
660 //cout << "test bearing " << test_brg
661 //<< " test_rng " << test_rng * SG_METER_TO_NM
662 //<< " persistance " << _persistance
669 if (!_ai_enabled_node->getBoolValue())
672 bool draw_echoes = _radar_position_node->getBoolValue();
673 bool draw_symbols = _radar_symbol_node->getBoolValue();
674 bool draw_data = _radar_data_node->getBoolValue();
675 if (!draw_echoes && !draw_symbols && !draw_data)
678 double user_lat = _user_lat_node->getDoubleValue();
679 double user_lon = _user_lon_node->getDoubleValue();
680 double user_alt = _user_alt_node->getDoubleValue();
682 float limit = _radar_coverage_node->getFloatValue();
687 limit *= SG_DEGREES_TO_RADIANS;
689 int selected_id = fgGetInt("/instrumentation/radar/selected-id", -1);
691 const SGPropertyNode *selected_ac = 0;
692 const SGPropertyNode *ai = fgGetNode("/ai/models", true);
694 for (int i = ai->nChildren() - 1; i >= -1; i--) {
695 const SGPropertyNode *model;
697 if (i < 0) { // last iteration: selected model
700 model = ai->getChild(i);
701 if (!model->nChildren())
703 if (model->getIntValue("id") == selected_id) {
704 selected_ac = model; // save selected model for last iteration
711 double echo_radius, sigma;
712 const string name = model->getName();
714 //cout << "name "<<name << endl;
715 if (name == "aircraft" || name == "tanker")
716 echo_radius = 1, sigma = 1;
717 else if (name == "multiplayer" || name == "wingman" || name == "static")
718 echo_radius = 1.5, sigma = 1;
719 else if (name == "ship" || name == "carrier" || name == "escort" ||name == "storm")
720 echo_radius = 1.5, sigma = 100;
721 else if (name == "thermal")
722 echo_radius = 2, sigma = 100;
723 else if (name == "rocket")
724 echo_radius = 0.1, sigma = 0.1;
725 else if (name == "ballistic")
726 echo_radius = 0.001, sigma = 0.001;
730 double lat = model->getDoubleValue("position/latitude-deg");
731 double lon = model->getDoubleValue("position/longitude-deg");
732 double alt = model->getDoubleValue("position/altitude-ft");
733 double heading = model->getDoubleValue("orientation/true-heading-deg");
735 double range, bearing;
736 calcRangeBearing(user_lat, user_lon, lat, lon, range, bearing);
737 //cout << _antenna_ht << _interval<< endl;
738 bool isVisible = withinRadarHorizon(user_alt, alt, range);
743 if (!inRadarRange(sigma, range))
746 bearing *= SG_DEGREES_TO_RADIANS;
747 heading *= SG_DEGREES_TO_RADIANS;
749 float radius = range * _scale;
750 float angle = calcRelBearing(bearing, _view_heading);
752 if (angle > limit || angle < -limit)
755 bearing += _angle_offset;
756 heading += _angle_offset;
760 float size = echo_radius * 120 * UNIT;
762 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
763 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
764 * osg::Matrixf::translate(0.0f, radius, 0.0f)
765 * wxRotate(bearing) * _centerTrans);
766 addQuad(_vertices, _texCoords, m, texBase);
771 const osg::Vec2f texBase(0, 3 * UNIT);
772 float size = 600 * UNIT;
773 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
774 * wxRotate(heading - bearing)
775 * osg::Matrixf::translate(0.0f, radius, 0.0f)
776 * wxRotate(bearing) * _centerTrans);
777 addQuad(_vertices, _texCoords, m, texBase);
780 if (draw_data || i < 0) // selected one (i == -1) is always drawn
781 update_data(model, alt, heading, radius, bearing, i < 0);
787 wxRadarBg::update_tacan()
790 int mode = _radar_mode_control_node->getIntValue();
791 bool inRange = _tacan_in_range_node->getBoolValue();
793 if (mode != 1 || !inRange)
796 float size = 600 * UNIT;
797 float radius = _tacan_distance_node->getFloatValue() * _scale;
798 float angle = _tacan_bearing_node->getFloatValue() * SG_DEGREES_TO_RADIANS
801 const osg::Vec2f texBase(1 * UNIT, 3 * UNIT);
802 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
804 * osg::Matrixf::translate(0.0f, radius, 0.0f)
805 * wxRotate(angle) * _centerTrans);
806 addQuad(_vertices, _texCoords, m, texBase);
808 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing TACAN"
809 // << " dist=" << radius
810 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
811 // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
812 // << " x=" << x << " y="<< y
813 // << " size=" << size);
818 wxRadarBg::update_heading_marker()
820 if (!_radar_hdg_marker_node->getBoolValue())
823 const osg::Vec2f texBase(2 * UNIT, 3 * UNIT);
824 float size = 600 * UNIT;
825 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
826 * wxRotate(_view_heading + _angle_offset));
829 addQuad(_vertices, _texCoords, m, texBase);
831 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing heading marker"
832 // << " x,y " << x <<","<< y
833 // << " dist" << dist
834 // << " view_heading" << _view_heading * SG_RADIANS_TO_DEGREES
835 // << " heading " << iradarEcho->heading * SG_RADIANS_TO_DEGREES
836 // << " angle " << angle * SG_RADIANS_TO_DEGREES);
841 wxRadarBg::center_map()
843 _lat = _user_lat_node->getDoubleValue();
844 _lon = _user_lon_node->getDoubleValue();
845 _x_offset = _y_offset = 0;
850 wxRadarBg::apply_map_offset()
852 double lat = _user_lat_node->getDoubleValue();
853 double lon = _user_lon_node->getDoubleValue();
854 double bearing, distance, az2;
855 geo_inverse_wgs_84(_lat, _lon, lat, lon, &bearing, &az2, &distance);
856 distance *= SG_METER_TO_NM * _scale;
857 bearing *= SG_DEGREES_TO_RADIANS;
858 _x_offset += sin(bearing) * distance;
859 _y_offset += cos(bearing) * distance;
866 wxRadarBg::withinRadarHorizon(double user_alt, double alt, double range_nm)
868 // Radar Horizon = 1.23(ht^1/2 + hr^1/2),
869 //don't allow negative altitudes (an approximation - yes altitudes can be negative)
870 // Allow antenna ht to be set, but only on ground
871 _antenna_ht = _Instrument->getDoubleValue("antenna-ht-ft");
874 user_alt = _antenna_ht;
877 alt = 0; // to allow some vertical extent of target
879 double radarhorizon = 1.23 * (sqrt(alt) + sqrt(user_alt));
880 // SG_LOG(SG_GENERAL, SG_ALERT, "Radar: radar horizon " << radarhorizon);
881 return radarhorizon >= range_nm;
886 wxRadarBg::inRadarRange(double sigma, double range_nm)
888 //The Radar Equation:
890 // MaxRange^4 = (TxPower * AntGain^2 * lambda^2 * sigma)/((constant) * MDS)
892 // Where (constant) = (4*pi)3 and MDS is the Minimum Detectable Signal power.
894 // For a given radar we can assume that the only variable is sigma,
895 // the target radar cross section.
897 // Here, we will use a normalised rcs (sigma) for a standard taget and assume that this
898 // will provide a maximum range of 35nm;
900 // TODO - make the maximum range adjustable at runtime
902 double constant = _radar_ref_rng;
907 double maxrange = constant * pow(sigma, 0.25);
908 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: max range " << maxrange);
909 return maxrange >= range_nm;
914 wxRadarBg::calcRangeBearing(double lat, double lon, double lat2, double lon2,
915 double &range, double &bearing) const
917 // calculate the bearing and range of the second pos from the first
918 double az2, distance;
919 geo_inverse_wgs_84(lat, lon, lat2, lon2, &bearing, &az2, &distance);
920 range = distance *= SG_METER_TO_NM;
925 wxRadarBg::calcRelBearing(float bearing, float heading)
927 float angle = bearing - heading;
930 angle -= 2.0 * SG_PI;
933 angle += 2.0 * SG_PI;
939 wxRadarBg::calcRelBearingDeg(float bearing, float heading)
941 float angle = bearing - heading;
954 wxRadarBg::updateFont()
956 float red = _font_node->getFloatValue("color/red");
957 float green = _font_node->getFloatValue("color/green");
958 float blue = _font_node->getFloatValue("color/blue");
959 float alpha = _font_node->getFloatValue("color/alpha");
960 _font_color.set(red, green, blue, alpha);
962 _font_size = _font_node->getFloatValue("size");
963 _font_spacing = _font_size * _font_node->getFloatValue("line-spacing");
964 string path = _font_node->getStringValue("name", DEFAULT_FONT);
967 if (path[0] != '/') {
968 tpath = globals->get_fg_root();
969 tpath.append("Fonts");
975 #if (FG_OSG_VERSION >= 21000)
976 osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
977 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str(), fontOptions.get());
979 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str());
984 _font->setMinFilterHint(osg::Texture::NEAREST);
985 _font->setMagFilterHint(osg::Texture::NEAREST);
986 _font->setGlyphImageMargin(0);
987 _font->setGlyphImageMarginRatio(0);
992 wxRadarBg::valueChanged(SGPropertyNode*)