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>
60 #include "instrument_mgr.hxx"
61 #include "od_gauge.hxx"
62 #include "wxradar.hxx"
64 #include <iostream> // for cout, endl
69 static const float UNIT = 1.0f / 8.0f; // 8 symbols in a row/column in the texture
70 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)),
78 _sim_init_done(false),
80 _last_switchKnob("off"),
81 _antenna_ht(node->getDoubleValue("antenna-ht-ft", 0.0)),
86 branch = "/instrumentation/" + _name;
87 _Instrument = fgGetNode(branch.c_str(), _num, true);
89 const char *tacan_source = node->getStringValue("tacan-source", "/instrumentation/tacan");
90 _Tacan = fgGetNode(tacan_source, true);
92 _font_node = _Instrument->getNode("font", true);
94 #define INITFONT(p, val, type) if (!_font_node->hasValue(p)) _font_node->set##type##Value(p, val)
95 INITFONT("name", DEFAULT_FONT, String);
96 INITFONT("size", 8, Float);
97 INITFONT("line-spacing", 0.25, Float);
98 INITFONT("color/red", 0, Float);
99 INITFONT("color/green", 0.8, Float);
100 INITFONT("color/blue", 0, Float);
101 INITFONT("color/alpha", 1, Float);
104 _font_node->addChangeListener(this, true);
108 wxRadarBg::~wxRadarBg ()
110 _font_node->removeChangeListener(this);
117 _serviceable_node = _Instrument->getNode("serviceable", true);
119 // texture name to use in 2D and 3D instruments
120 _texture_path = _Instrument->getStringValue("radar-texture-path",
121 "Aircraft/Instruments/Textures/od_wxradar.rgb");
122 _resultTexture = FGTextureManager::createTexture(_texture_path.c_str(), false);
124 string path = _Instrument->getStringValue("echo-texture-path",
125 "Aircraft/Instruments/Textures/wxecho.rgb");
126 SGPath tpath = globals->resolve_aircraft_path(path);
128 // no mipmap or else alpha will mix with pixels on the border of shapes, ruining the effect
129 _wxEcho = SGLoadTexture2D(tpath, false, false);
132 _Instrument->setFloatValue("trk", 0.0);
133 _Instrument->setFloatValue("tilt", 0.0);
134 _Instrument->setStringValue("status", "");
135 // those properties are used by a radar instrument of a MFD
136 // input switch = OFF | TST | STBY | ON
137 // input mode = WX | WXA | MAP
138 // output status = STBY | TEST | WX | WXA | MAP | blank
139 // input lightning = true | false
140 // input TRK = +/- n degrees
141 // input TILT = +/- n degree
142 // input autotilt = true | false
143 // input range = n nm (20/40/80)
144 // input display-mode = arc | rose | map | plan
146 FGInstrumentMgr *imgr = (FGInstrumentMgr *)globals->get_subsystem("instrumentation");
147 _odg = (FGODGauge *)imgr->get_subsystem("od_gauge");
150 _ai_enabled_node = fgGetNode("/sim/ai/enabled", true);
152 _user_lat_node = fgGetNode("/position/latitude-deg", true);
153 _user_lon_node = fgGetNode("/position/longitude-deg", true);
154 _user_alt_node = fgGetNode("/position/altitude-ft", true);
156 _user_speed_east_fps_node = fgGetNode("/velocities/speed-east-fps", true);
157 _user_speed_north_fps_node = fgGetNode("/velocities/speed-north-fps", true);
159 _tacan_serviceable_node = _Tacan->getNode("serviceable", true);
160 _tacan_distance_node = _Tacan->getNode("indicated-distance-nm", true);
161 _tacan_name_node = _Tacan->getNode("name", true);
162 _tacan_bearing_node = _Tacan->getNode("indicated-bearing-true-deg", true);
163 _tacan_in_range_node = _Tacan->getNode("in-range", true);
165 _radar_mode_control_node = _Instrument->getNode("mode-control", true);
166 _radar_coverage_node = _Instrument->getNode("limit-deg", true);
167 _radar_ref_rng_node = _Instrument->getNode("reference-range-nm", true);
168 _radar_hdg_marker_node = _Instrument->getNode("heading-marker", true);
170 SGPropertyNode *n = _Instrument->getNode("display-controls", true);
171 _radar_weather_node = n->getNode("WX", true);
172 _radar_position_node = n->getNode("pos", true);
173 _radar_data_node = n->getNode("data", true);
174 _radar_symbol_node = n->getNode("symbol", true);
175 _radar_centre_node = n->getNode("centre", true);
176 _radar_rotate_node = n->getNode("rotate", true);
178 _radar_centre_node->setBoolValue(false);
179 if (!_radar_coverage_node->hasValue())
180 _radar_coverage_node->setFloatValue(120);
181 if (!_radar_ref_rng_node->hasValue())
182 _radar_ref_rng_node->setDoubleValue(35);
183 if (!_radar_hdg_marker_node->hasValue())
184 _radar_hdg_marker_node->setBoolValue(true);
189 // OSG geometry setup. The polygons for the radar returns will be
190 // stored in a single Geometry. The geometry will have several
191 // primitive sets so we can have different kinds of polys and
192 // choose a different overall color for each set.
193 _radarGeode = new osg::Geode;
194 osg::StateSet *stateSet = _radarGeode->getOrCreateStateSet();
195 stateSet->setTextureAttributeAndModes(0, _wxEcho.get());
196 _geom = new osg::Geometry;
197 _geom->setUseDisplayList(false);
198 // Initially allocate space for 128 quads
199 _vertices = new osg::Vec2Array;
200 _vertices->setDataVariance(osg::Object::DYNAMIC);
201 _vertices->reserve(128 * 4);
202 _geom->setVertexArray(_vertices);
203 _texCoords = new osg::Vec2Array;
204 _texCoords->setDataVariance(osg::Object::DYNAMIC);
205 _texCoords->reserve(128 * 4);
206 _geom->setTexCoordArray(0, _texCoords);
207 osg::Vec3Array *colors = new osg::Vec3Array;
208 colors->push_back(osg::Vec3(1.0f, 1.0f, 1.0f)); // color of echos
209 colors->push_back(osg::Vec3(1.0f, 0.0f, 0.0f)); // arc mask
210 colors->push_back(osg::Vec3(0.0f, 0.0f, 0.0f)); // rest of mask
211 _geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
212 _geom->setColorArray(colors);
213 osg::PrimitiveSet *pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
214 pset->setDataVariance(osg::Object::DYNAMIC);
215 _geom->addPrimitiveSet(pset);
216 pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
217 pset->setDataVariance(osg::Object::DYNAMIC);
218 _geom->addPrimitiveSet(pset);
219 pset = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES);
220 pset->setDataVariance(osg::Object::DYNAMIC);
221 _geom->addPrimitiveSet(pset);
222 _geom->setInitialBound(osg::BoundingBox(osg::Vec3f(-256.0f, -256.0f, 0.0f),
223 osg::Vec3f(256.0f, 256.0f, 0.0f)));
224 _radarGeode->addDrawable(_geom);
226 // Texture in the 2D panel system
227 FGTextureManager::addTexture(_texture_path.c_str(), _odg->getTexture());
229 _textGeode = new osg::Geode;
231 osg::Camera *camera = _odg->getCamera();
232 camera->addChild(_radarGeode.get());
233 camera->addChild(_textGeode.get());
237 // Local coordinates for each echo
238 const osg::Vec3f echoCoords[4] = {
239 osg::Vec3f(-.7f, -.7f, 0.0f), osg::Vec3f(.7f, -.7f, 0.0f),
240 osg::Vec3f(.7f, .7f, 0.0f), osg::Vec3f(-.7f, .7f, 0.0f)
244 const osg::Vec2f echoTexCoords[4] = {
245 osg::Vec2f(0.0f, 0.0f), osg::Vec2f(UNIT, 0.0f),
246 osg::Vec2f(UNIT, UNIT), osg::Vec2f(0.0f, UNIT)
252 addQuad(osg::Vec2Array *vertices, osg::Vec2Array *texCoords,
253 const osg::Matrixf& transform, const osg::Vec2f& texBase)
255 for (int i = 0; i < 4; i++) {
256 const osg::Vec3f coords = transform.preMult(echoCoords[i]);
257 texCoords->push_back(texBase + echoTexCoords[i]);
258 vertices->push_back(osg::Vec2f(coords.x(), coords.y()));
263 // Rotate by a heading value
265 osg::Matrixf wxRotate(float angle)
267 return osg::Matrixf::rotate(angle, 0.0f, 0.0f, -1.0f);
272 wxRadarBg::update (double delta_time_sec)
274 if (!_sim_init_done) {
275 if (!fgGetBool("sim/sceneryloaded", false))
278 _sim_init_done = true;
280 if (!_odg || !_serviceable_node->getBoolValue()) {
281 _Instrument->setStringValue("status", "");
284 _time += delta_time_sec;
285 if (_time < _interval){
286 // cout << "WXradar update too soon " << _time << endl;
289 // cout << "WXradar updating" << _time<< endl;
293 string mode = _Instrument->getStringValue("display-mode", "arc");
295 if (_display_mode != MAP) {
299 } else if (mode == "plan") {
300 _display_mode = PLAN;}
301 else if (mode == "bscan") {
302 _display_mode = BSCAN;
307 string switchKnob = _Instrument->getStringValue("switch", "on");
308 if (_last_switchKnob != switchKnob) {
309 // since 3D models don't share textures with the rest of the world
310 // we must locate them and replace their handle by hand
311 // only do that when the instrument is turned on
312 //if (_last_switchKnob == "off")
313 //_odg->set_texture(_texture_path.c_str(), _resultTexture->getHandle());
315 _last_switchKnob = switchKnob;
318 if (switchKnob == "off") {
319 _Instrument->setStringValue("status", "");
320 } else if (switchKnob == "stby") {
321 _Instrument->setStringValue("status", "STBY");
322 } else if (switchKnob == "tst") {
323 _Instrument->setStringValue("status", "TST");
324 // find something interesting to do...
326 float r = _Instrument->getFloatValue("range", 40.0);
327 if (r != _range_nm) {
332 _radar_ref_rng = _radar_ref_rng_node->getDoubleValue();
333 _view_heading = fgGetDouble("/orientation/heading-deg") * SG_DEGREES_TO_RADIANS;
334 _centerTrans.makeTranslate(0.0f, 0.0f, 0.0f);
336 _scale = 200.0 / _range_nm;
339 if (_display_mode == ARC) {
340 _scale = 2*200.0f / _range_nm;
341 _angle_offset = -_view_heading;
342 _centerTrans.makeTranslate(0.0f, -200.0f, 0.0f);
344 } else if (_display_mode == MAP) {
347 bool centre = _radar_centre_node->getBoolValue();
350 _radar_centre_node->setBoolValue(false);
353 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: displacement "
354 // << _x_offset <<", "<<_y_offset
355 // << " user_speed_east_fps * SG_FPS_TO_KT "
356 // << user_speed_east_fps * SG_FPS_TO_KT
357 // << " user_speed_north_fps * SG_FPS_TO_KT "
358 // << user_speed_north_fps * SG_FPS_TO_KT
359 // << " dt " << delta_time_sec);
361 _centerTrans.makeTranslate(_x_offset, _y_offset, 0.0f);
363 } else if (_display_mode == PLAN) {
364 if (_radar_rotate_node->getBoolValue()) {
365 _angle_offset = -_view_heading;
367 } else if (_display_mode == BSCAN) {
368 _angle_offset = -_view_heading;
375 _textGeode->removeDrawables(0, _textGeode->getNumDrawables());
381 osg::DrawArrays *quadPSet
382 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(0));
383 quadPSet->set(osg::PrimitiveSet::QUADS, 0, _vertices->size());
386 // erase what is out of sight of antenna
397 osg::DrawArrays *maskPSet
398 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(1));
399 osg::DrawArrays *trimaskPSet
400 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(2));
402 if (_display_mode == ARC) {
403 float xOffset = 256.0f;
404 float yOffset = 200.0f;
406 int firstQuadVert = _vertices->size();
407 _texCoords->push_back(osg::Vec2f(0.5f, 0.25f));
408 _vertices->push_back(osg::Vec2f(-xOffset, 0.0 + yOffset));
409 _texCoords->push_back(osg::Vec2f(1.0f, 0.25f));
410 _vertices->push_back(osg::Vec2f(xOffset, 0.0 + yOffset));
411 _texCoords->push_back(osg::Vec2f(1.0f, 0.5f));
412 _vertices->push_back(osg::Vec2f(xOffset, 256.0 + yOffset));
413 _texCoords->push_back(osg::Vec2f(0.5f, 0.5f));
414 _vertices->push_back(osg::Vec2f(-xOffset, 256.0 + yOffset));
415 maskPSet->set(osg::PrimitiveSet::QUADS, firstQuadVert, 4);
417 // The triangles aren't supposed to be textured, but there's
418 // no need to set up a different Geometry, switch modes,
419 // etc. I happen to know that there's a white pixel in the
420 // texture at 1.0, 0.0 :)
421 float centerY = tan(30 * SG_DEGREES_TO_RADIANS);
422 _vertices->push_back(osg::Vec2f(0.0, 0.0));
423 _vertices->push_back(osg::Vec2f(-256.0, 0.0));
424 _vertices->push_back(osg::Vec2f(-256.0, 256.0 * centerY));
426 _vertices->push_back(osg::Vec2f(0.0, 0.0));
427 _vertices->push_back(osg::Vec2f(256.0, 0.0));
428 _vertices->push_back(osg::Vec2f(256.0, 256.0 * centerY));
430 _vertices->push_back(osg::Vec2f(-256, 0.0));
431 _vertices->push_back(osg::Vec2f(256.0, 0.0));
432 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
434 _vertices->push_back(osg::Vec2f(256, 0.0));
435 _vertices->push_back(osg::Vec2f(256.0, -256.0));
436 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
438 const osg::Vec2f whiteSpot(1.0f, 0.0f);
439 for (int i = 0; i < 3 * 4; i++)
440 _texCoords->push_back(whiteSpot);
442 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, firstQuadVert + 4, 3 * 4);
445 maskPSet->set(osg::PrimitiveSet::QUADS, 0, 0);
446 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, 0, 0);
450 trimaskPSet->dirty();
458 update_heading_marker();
460 quadPSet->set(osg::PrimitiveSet::QUADS, 0, _vertices->size());
467 wxRadarBg::update_weather()
469 string modeButton = _Instrument->getStringValue("mode", "WX");
470 _radarEchoBuffer = *sgEnviro.get_radar_echo();
472 // pretend we have a scan angle bigger then the FOV
473 // TODO:check real fov, enlarge if < nn, and do clipping if > mm
474 // const float fovFactor = 1.45f;
475 _Instrument->setStringValue("status", modeButton.c_str());
477 list_of_SGWxRadarEcho *radarEcho = &_radarEchoBuffer;
478 list_of_SGWxRadarEcho::iterator iradarEcho, end = radarEcho->end();
479 const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
481 // draw the cloud radar echo
482 bool drawClouds = _radar_weather_node->getBoolValue();
485 // we do that in 3 passes, one for each color level
486 // this is to 'merge' same colors together
487 for (int level = 0; level <= 2; level++) {
488 float col = level * UNIT;
490 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
491 int cloudId = iradarEcho->cloudId;
492 bool upgrade = (cloudId >> 5) & 1;
493 float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
496 if (iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
499 if (iradarEcho->lightning || lwc < LWClevel[level])
502 float radius = sqrt(iradarEcho->dist) * SG_METER_TO_NM * _scale;
503 float size = iradarEcho->radius * 2.0 * SG_METER_TO_NM * _scale;
505 if (radius - size > 180)
508 float angle = (iradarEcho->heading - _angle_offset) //* fovFactor
511 // Rotate echo into position, and rotate echo to have
512 // a constant orientation towards the
513 // airplane. Compass headings increase in clockwise
514 // direction, while graphics rotations follow
515 // right-hand (counter-clockwise) rule.
516 const osg::Vec2f texBase(col, (UNIT * (float) (4 + (cloudId & 3))));
518 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
519 * osg::Matrixf::translate(0.0f, radius, 0.0f)
520 * wxRotate(angle) * _centerTrans);
521 addQuad(_vertices, _texCoords, m, texBase);
523 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing clouds"
524 // << " ID=" << cloudId
527 // << " radius=" << radius
528 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
529 // << " heading=" << iradarEcho->heading * SG_RADIANS_TO_DEGREES
530 // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
535 // draw lightning echos
536 bool drawLightning = _Instrument->getBoolValue("lightning", true);
538 const osg::Vec2f texBase(3 * UNIT, 4 * UNIT);
540 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
541 if (!iradarEcho->lightning)
544 float size = UNIT * 0.5f;
545 float radius = iradarEcho->dist * _scale;
546 float angle = iradarEcho->heading * SG_DEGREES_TO_RADIANS
549 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
551 * osg::Matrixf::translate(0.0f, radius, 0.0f)
552 * wxRotate(angle) * _centerTrans);
553 addQuad(_vertices, _texCoords, m, texBase);
560 wxRadarBg::update_data(const SGPropertyNode *ac, double altitude, double heading,
561 double radius, double bearing, bool selected)
563 osgText::Text *callsign = new osgText::Text;
564 callsign->setFont(_font.get());
565 callsign->setFontResolution(12, 12);
566 callsign->setCharacterSize(_font_size);
567 callsign->setColor(selected ? osg::Vec4(1, 1, 1, 1) : _font_color);
568 osg::Matrixf m(wxRotate(-bearing)
569 * osg::Matrixf::translate(0.0f, radius, 0.0f)
570 * wxRotate(bearing) * _centerTrans);
572 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
573 // cast to int's, otherwise text comes out ugly
574 callsign->setPosition(osg::Vec3((int)pos.x(), (int)pos.y(), 0));
575 callsign->setAlignment(osgText::Text::LEFT_BOTTOM_BASE_LINE);
576 callsign->setLineSpacing(_font_spacing);
578 const char *identity = ac->getStringValue("transponder-id");
580 identity = ac->getStringValue("callsign");
583 text << identity << endl
584 << setprecision(0) << fixed
585 << setw(3) << setfill('0') << heading * SG_RADIANS_TO_DEGREES << "\xB0 "
586 << setw(0) << altitude << "ft" << endl
587 << ac->getDoubleValue("velocities/true-airspeed-kt") << "kts";
589 callsign->setText(text.str());
590 _textGeode->addDrawable(callsign);
595 wxRadarBg::update_aircraft()
598 double age_factor = 1.0;
606 if (!ground_echoes.empty()){
607 ground_echoes_iterator = ground_echoes.begin();
609 while(ground_echoes_iterator != ground_echoes.end()) {
610 diff = _elapsed_time - (*ground_echoes_iterator)->elapsed_time;
612 if( diff > _persistance) {
613 ground_echoes.erase(ground_echoes_iterator);
615 // double test_brg = (*ground_echoes_iterator)->bearing;
616 // double bearing = test_brg * SG_DEGREES_TO_RADIANS;
617 // float angle = calcRelBearing(bearing, _view_heading);
618 double bumpinessFactor = (*ground_echoes_iterator)->bumpiness;
619 float heading = fgGetDouble("/orientation/heading-deg");
620 if ( _display_mode == BSCAN ){
621 test_rng = (*ground_echoes_iterator)->elevation * 6;
622 test_brg = (*ground_echoes_iterator)->bearing;
623 angle = calcRelBearingDeg(test_brg, heading) * 6;
624 range = sqrt(test_rng * test_rng + angle * angle);
625 bearing = atan2(angle, test_rng);
626 //cout << "angle " << angle <<" bearing "
627 // << bearing / SG_DEGREES_TO_RADIANS << endl;
628 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 240 * age_factor;
630 test_rng = (*ground_echoes_iterator)->range;
631 range = test_rng * SG_METER_TO_NM;
632 test_brg = (*ground_echoes_iterator)->bearing;
633 bearing = test_brg * SG_DEGREES_TO_RADIANS;
634 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 120 * age_factor;
635 bearing += _angle_offset;
638 float radius = range * _scale;
639 //double heading = 90 * SG_DEGREES_TO_RADIANS;
640 //heading += _angle_offset;
645 age_factor = 1 - (0.5 * diff/_persistance);
647 float size = echo_radius * UNIT;
649 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
650 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
651 * osg::Matrixf::translate(0.0f, radius, 0.0f)
652 * wxRotate(bearing) * _centerTrans);
653 addQuad(_vertices, _texCoords, m, texBase);
655 ++ground_echoes_iterator;
657 //cout << "test bearing " << test_brg
658 //<< " test_rng " << test_rng * SG_METER_TO_NM
659 //<< " persistance " << _persistance
666 if (!_ai_enabled_node->getBoolValue())
669 bool draw_echoes = _radar_position_node->getBoolValue();
670 bool draw_symbols = _radar_symbol_node->getBoolValue();
671 bool draw_data = _radar_data_node->getBoolValue();
672 if (!draw_echoes && !draw_symbols && !draw_data)
675 double user_lat = _user_lat_node->getDoubleValue();
676 double user_lon = _user_lon_node->getDoubleValue();
677 double user_alt = _user_alt_node->getDoubleValue();
679 float limit = _radar_coverage_node->getFloatValue();
684 limit *= SG_DEGREES_TO_RADIANS;
686 int selected_id = fgGetInt("/instrumentation/radar/selected-id", -1);
688 const SGPropertyNode *selected_ac = 0;
689 const SGPropertyNode *ai = fgGetNode("/ai/models", true);
691 for (int i = ai->nChildren() - 1; i >= -1; i--) {
692 const SGPropertyNode *model;
694 if (i < 0) { // last iteration: selected model
697 model = ai->getChild(i);
698 if (!model->nChildren())
700 if (model->getIntValue("id") == selected_id) {
701 selected_ac = model; // save selected model for last iteration
708 double echo_radius, sigma;
709 const string name = model->getName();
711 //cout << "name "<<name << endl;
712 if (name == "aircraft" || name == "tanker")
713 echo_radius = 1, sigma = 1;
714 else if (name == "multiplayer" || name == "wingman" || name == "static")
715 echo_radius = 1.5, sigma = 1;
716 else if (name == "ship" || name == "carrier" || name == "escort" ||name == "storm")
717 echo_radius = 1.5, sigma = 100;
718 else if (name == "thermal")
719 echo_radius = 2, sigma = 100;
720 else if (name == "rocket")
721 echo_radius = 0.1, sigma = 0.1;
722 else if (name == "ballistic")
723 echo_radius = 0.001, sigma = 0.001;
727 double lat = model->getDoubleValue("position/latitude-deg");
728 double lon = model->getDoubleValue("position/longitude-deg");
729 double alt = model->getDoubleValue("position/altitude-ft");
730 double heading = model->getDoubleValue("orientation/true-heading-deg");
732 double range, bearing;
733 calcRangeBearing(user_lat, user_lon, lat, lon, range, bearing);
734 //cout << _antenna_ht << _interval<< endl;
735 bool isVisible = withinRadarHorizon(user_alt, alt, range);
740 if (!inRadarRange(sigma, range))
743 bearing *= SG_DEGREES_TO_RADIANS;
744 heading *= SG_DEGREES_TO_RADIANS;
746 float radius = range * _scale;
747 float angle = calcRelBearing(bearing, _view_heading);
749 if (angle > limit || angle < -limit)
752 bearing += _angle_offset;
753 heading += _angle_offset;
757 float size = echo_radius * 120 * UNIT;
759 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
760 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
761 * osg::Matrixf::translate(0.0f, radius, 0.0f)
762 * wxRotate(bearing) * _centerTrans);
763 addQuad(_vertices, _texCoords, m, texBase);
768 const osg::Vec2f texBase(0, 3 * UNIT);
769 float size = 600 * UNIT;
770 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
771 * wxRotate(heading - bearing)
772 * osg::Matrixf::translate(0.0f, radius, 0.0f)
773 * wxRotate(bearing) * _centerTrans);
774 addQuad(_vertices, _texCoords, m, texBase);
777 if (draw_data || i < 0) // selected one (i == -1) is always drawn
778 update_data(model, alt, heading, radius, bearing, i < 0);
784 wxRadarBg::update_tacan()
787 int mode = _radar_mode_control_node->getIntValue();
788 bool inRange = _tacan_in_range_node->getBoolValue();
790 if (mode != 1 || !inRange)
793 float size = 600 * UNIT;
794 float radius = _tacan_distance_node->getFloatValue() * _scale;
795 float angle = _tacan_bearing_node->getFloatValue() * SG_DEGREES_TO_RADIANS
798 const osg::Vec2f texBase(1 * UNIT, 3 * UNIT);
799 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
801 * osg::Matrixf::translate(0.0f, radius, 0.0f)
802 * wxRotate(angle) * _centerTrans);
803 addQuad(_vertices, _texCoords, m, texBase);
805 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing TACAN"
806 // << " dist=" << radius
807 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
808 // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
809 // << " x=" << x << " y="<< y
810 // << " size=" << size);
815 wxRadarBg::update_heading_marker()
817 if (!_radar_hdg_marker_node->getBoolValue())
820 const osg::Vec2f texBase(2 * UNIT, 3 * UNIT);
821 float size = 600 * UNIT;
822 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
823 * wxRotate(_view_heading + _angle_offset));
826 addQuad(_vertices, _texCoords, m, texBase);
828 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing heading marker"
829 // << " x,y " << x <<","<< y
830 // << " dist" << dist
831 // << " view_heading" << _view_heading * SG_RADIANS_TO_DEGREES
832 // << " heading " << iradarEcho->heading * SG_RADIANS_TO_DEGREES
833 // << " angle " << angle * SG_RADIANS_TO_DEGREES);
838 wxRadarBg::center_map()
840 _lat = _user_lat_node->getDoubleValue();
841 _lon = _user_lon_node->getDoubleValue();
842 _x_offset = _y_offset = 0;
847 wxRadarBg::apply_map_offset()
849 double lat = _user_lat_node->getDoubleValue();
850 double lon = _user_lon_node->getDoubleValue();
851 double bearing, distance, az2;
852 geo_inverse_wgs_84(_lat, _lon, lat, lon, &bearing, &az2, &distance);
853 distance *= SG_METER_TO_NM * _scale;
854 bearing *= SG_DEGREES_TO_RADIANS;
855 _x_offset += sin(bearing) * distance;
856 _y_offset += cos(bearing) * distance;
863 wxRadarBg::withinRadarHorizon(double user_alt, double alt, double range_nm)
865 // Radar Horizon = 1.23(ht^1/2 + hr^1/2),
866 //don't allow negative altitudes (an approximation - yes altitudes can be negative)
867 // Allow antenna ht to be set, but only on ground
868 _antenna_ht = _Instrument->getDoubleValue("antenna-ht-ft");
871 user_alt = _antenna_ht;
874 alt = 0; // to allow some vertical extent of target
876 double radarhorizon = 1.23 * (sqrt(alt) + sqrt(user_alt));
877 // SG_LOG(SG_GENERAL, SG_ALERT, "Radar: radar horizon " << radarhorizon);
878 return radarhorizon >= range_nm;
883 wxRadarBg::inRadarRange(double sigma, double range_nm)
885 //The Radar Equation:
887 // MaxRange^4 = (TxPower * AntGain^2 * lambda^2 * sigma)/((constant) * MDS)
889 // Where (constant) = (4*pi)3 and MDS is the Minimum Detectable Signal power.
891 // For a given radar we can assume that the only variable is sigma,
892 // the target radar cross section.
894 // Here, we will use a normalised rcs (sigma) for a standard taget and assume that this
895 // will provide a maximum range of 35nm;
897 // TODO - make the maximum range adjustable at runtime
899 double constant = _radar_ref_rng;
904 double maxrange = constant * pow(sigma, 0.25);
905 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: max range " << maxrange);
906 return maxrange >= range_nm;
911 wxRadarBg::calcRangeBearing(double lat, double lon, double lat2, double lon2,
912 double &range, double &bearing) const
914 // calculate the bearing and range of the second pos from the first
915 double az2, distance;
916 geo_inverse_wgs_84(lat, lon, lat2, lon2, &bearing, &az2, &distance);
917 range = distance *= SG_METER_TO_NM;
922 wxRadarBg::calcRelBearing(float bearing, float heading)
924 float angle = bearing - heading;
927 angle -= 2.0 * SG_PI;
930 angle += 2.0 * SG_PI;
936 wxRadarBg::calcRelBearingDeg(float bearing, float heading)
938 float angle = bearing - heading;
951 wxRadarBg::updateFont()
953 float red = _font_node->getFloatValue("color/red");
954 float green = _font_node->getFloatValue("color/green");
955 float blue = _font_node->getFloatValue("color/blue");
956 float alpha = _font_node->getFloatValue("color/alpha");
957 _font_color.set(red, green, blue, alpha);
959 _font_size = _font_node->getFloatValue("size");
960 _font_spacing = _font_size * _font_node->getFloatValue("line-spacing");
961 string path = _font_node->getStringValue("name", DEFAULT_FONT);
964 if (path[0] != '/') {
965 tpath = globals->get_fg_root();
966 tpath.append("Fonts");
972 #if (FG_OSG_VERSION >= 21000)
973 osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
974 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str(), fontOptions.get());
976 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str());
981 _font->setMinFilterHint(osg::Texture::NEAREST);
982 _font->setMagFilterHint(osg::Texture::NEAREST);
983 _font->setGlyphImageMargin(0);
984 _font->setGlyphImageMarginRatio(0);
989 wxRadarBg::valueChanged(SGPropertyNode*)