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)),
90 _antenna_ht(node->getDoubleValue("antenna-ht-ft", 0.0)),
97 branch = "/instrumentation/" + _name;
98 _Instrument = fgGetNode(branch.c_str(), _num, true);
100 const char *tacan_source = node->getStringValue("tacan-source", "/instrumentation/tacan");
101 _Tacan = fgGetNode(tacan_source, true);
103 _font_node = _Instrument->getNode("font", true);
105 #define INITFONT(p, val, type) if (!_font_node->hasValue(p)) _font_node->set##type##Value(p, val)
106 INITFONT("name", DEFAULT_FONT, String);
107 INITFONT("size", 8, Float);
108 INITFONT("line-spacing", 0.25, Float);
109 INITFONT("color/red", 0, Float);
110 INITFONT("color/green", 0.8, Float);
111 INITFONT("color/blue", 0, Float);
112 INITFONT("color/alpha", 1, Float);
115 _font_node->addChangeListener(this, true);
119 wxRadarBg::~wxRadarBg ()
121 _font_node->removeChangeListener(this);
129 _serviceable_node = _Instrument->getNode("serviceable", true);
130 _sceneryLoaded = fgGetNode("/sim/sceneryloaded", true);
132 // texture name to use in 2D and 3D instruments
133 _texture_path = _Instrument->getStringValue("radar-texture-path",
134 "Aircraft/Instruments/Textures/od_wxradar.rgb");
135 _resultTexture = FGTextureManager::createTexture(_texture_path.c_str(), false);
137 string path = _Instrument->getStringValue("echo-texture-path",
138 "Aircraft/Instruments/Textures/wxecho.rgb");
139 SGPath tpath = globals->resolve_aircraft_path(path);
141 // no mipmap or else alpha will mix with pixels on the border of shapes, ruining the effect
142 _wxEcho = SGLoadTexture2D(tpath, NULL, false, false);
145 _Instrument->setFloatValue("trk", 0.0);
146 _Instrument->setFloatValue("tilt", 0.0);
147 _Instrument->setStringValue("status", "");
148 // those properties are used by a radar instrument of a MFD
149 // input switch = OFF | TST | STBY | ON
150 // input mode = WX | WXA | MAP
151 // output status = STBY | TEST | WX | WXA | MAP | blank
152 // input lightning = true | false
153 // input TRK = +/- n degrees
154 // input TILT = +/- n degree
155 // input autotilt = true | false
156 // input range = n nm (20/40/80)
157 // input display-mode = arc | rose | map | plan
159 _odg = new FGODGauge;
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());
254 // Local coordinates for each echo
255 const osg::Vec3f echoCoords[4] = {
256 osg::Vec3f(-.7f, -.7f, 0.0f), osg::Vec3f(.7f, -.7f, 0.0f),
257 osg::Vec3f(.7f, .7f, 0.0f), osg::Vec3f(-.7f, .7f, 0.0f)
261 const osg::Vec2f echoTexCoords[4] = {
262 osg::Vec2f(0.0f, 0.0f), osg::Vec2f(UNIT, 0.0f),
263 osg::Vec2f(UNIT, UNIT), osg::Vec2f(0.0f, UNIT)
269 addQuad(osg::Vec2Array *vertices, osg::Vec2Array *texCoords,
270 const osg::Matrixf& transform, const osg::Vec2f& texBase)
272 for (int i = 0; i < 4; i++) {
273 const osg::Vec3f coords = transform.preMult(echoCoords[i]);
274 texCoords->push_back(texBase + echoTexCoords[i]);
275 vertices->push_back(osg::Vec2f(coords.x(), coords.y()));
280 // Rotate by a heading value
282 osg::Matrixf wxRotate(float angle)
284 return osg::Matrixf::rotate(angle, 0.0f, 0.0f, -1.0f);
289 wxRadarBg::update (double delta_time_sec)
291 if (!_sceneryLoaded->getBoolValue())
294 if (!_odg || !_serviceable_node->getBoolValue()) {
295 _Instrument->setStringValue("status", "");
299 _time += delta_time_sec;
300 if (_time < _interval)
305 string mode = _Instrument->getStringValue("display-mode", "arc");
307 if (_display_mode != MAP) {
311 } else if (mode == "plan") {
312 _display_mode = PLAN;}
313 else if (mode == "bscan") {
314 _display_mode = BSCAN;
319 string switchKnob = _Instrument->getStringValue("switch", "on");
320 if (switchKnob == "off") {
321 _Instrument->setStringValue("status", "");
322 } else if (switchKnob == "stby") {
323 _Instrument->setStringValue("status", "STBY");
324 } else if (switchKnob == "tst") {
325 _Instrument->setStringValue("status", "TST");
326 // find something interesting to do...
328 float r = _Instrument->getFloatValue("range", 40.0);
329 if (r != _range_nm) {
334 _radar_ref_rng = _radar_ref_rng_node->getDoubleValue();
335 _view_heading = fgGetDouble("/orientation/heading-deg") * SG_DEGREES_TO_RADIANS;
336 _centerTrans.makeTranslate(0.0f, 0.0f, 0.0f);
338 _scale = 200.0 / _range_nm;
341 if (_display_mode == ARC) {
342 _scale = 2*200.0f / _range_nm;
343 _angle_offset = -_view_heading;
344 _centerTrans.makeTranslate(0.0f, -200.0f, 0.0f);
346 } else if (_display_mode == MAP) {
349 bool centre = _radar_centre_node->getBoolValue();
352 _radar_centre_node->setBoolValue(false);
355 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: displacement "
356 // << _x_offset <<", "<<_y_offset
357 // << " user_speed_east_fps * SG_FPS_TO_KT "
358 // << user_speed_east_fps * SG_FPS_TO_KT
359 // << " user_speed_north_fps * SG_FPS_TO_KT "
360 // << user_speed_north_fps * SG_FPS_TO_KT
361 // << " dt " << delta_time_sec);
363 _centerTrans.makeTranslate(_x_offset, _y_offset, 0.0f);
365 } else if (_display_mode == PLAN) {
366 if (_radar_rotate_node->getBoolValue()) {
367 _angle_offset = -_view_heading;
369 } else if (_display_mode == BSCAN) {
370 _angle_offset = -_view_heading;
377 _textGeode->removeDrawables(0, _textGeode->getNumDrawables());
380 //TODO FIXME Mask below (only used for ARC mode) isn't properly aligned, i.e.
381 // it assumes the a/c position at the center of the display - though it's somewhere at
382 // bottom part for ARC mode.
383 // The mask hadn't worked at all for a while (probably since the OSG port) due to
384 // another bug (which is fixed now). Now, the mask is disabled completely until s.o.
385 // adapted the coordinates below. And the mask is only really useful to limit displayed
386 // weather blobs (not support yet).
387 // Aircraft echos are already limited properly through wxradar's "limit-deg" property.
389 osg::DrawArrays *maskPSet
390 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(1));
391 osg::DrawArrays *trimaskPSet
392 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(2));
394 if (_display_mode == ARC) {
395 // erase what is out of sight of antenna
405 float xOffset = 256.0f;
406 float yOffset = 200.0f;
408 int firstQuadVert = _vertices->size();
409 _texCoords->push_back(osg::Vec2f(0.5f, 0.25f));
410 _vertices->push_back(osg::Vec2f(-xOffset, 0.0 + yOffset));
411 _texCoords->push_back(osg::Vec2f(1.0f, 0.25f));
412 _vertices->push_back(osg::Vec2f(xOffset, 0.0 + yOffset));
413 _texCoords->push_back(osg::Vec2f(1.0f, 0.5f));
414 _vertices->push_back(osg::Vec2f(xOffset, 256.0 + yOffset));
415 _texCoords->push_back(osg::Vec2f(0.5f, 0.5f));
416 _vertices->push_back(osg::Vec2f(-xOffset, 256.0 + yOffset));
417 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, 3 * 4);
449 maskPSet->set(osg::PrimitiveSet::QUADS, 0, 0);
450 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, 0, 0);
454 trimaskPSet->dirty();
458 // remember index of next vertex
459 int vIndex = _vertices->size();
463 osg::DrawArrays *quadPSet
464 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(0));
468 update_heading_marker();
470 // draw all new vertices are quads
471 quadPSet->set(osg::PrimitiveSet::QUADS, vIndex, _vertices->size()-vIndex);
478 wxRadarBg::update_weather()
480 string modeButton = _Instrument->getStringValue("mode", "WX");
481 // FIXME: implementation of radar echoes missing
482 // _radarEchoBuffer = *sgEnviro.get_radar_echo();
484 // pretend we have a scan angle bigger then the FOV
485 // TODO:check real fov, enlarge if < nn, and do clipping if > mm
486 // const float fovFactor = 1.45f;
487 _Instrument->setStringValue("status", modeButton.c_str());
489 // FIXME: implementation of radar echoes missing
491 list_of_SGWxRadarEcho *radarEcho = &_radarEchoBuffer;
492 list_of_SGWxRadarEcho::iterator iradarEcho, end = radarEcho->end();
493 const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
495 // draw the cloud radar echo
496 bool drawClouds = _radar_weather_node->getBoolValue();
499 // we do that in 3 passes, one for each color level
500 // this is to 'merge' same colors together
501 for (int level = 0; level <= 2; level++) {
502 float col = level * UNIT;
504 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
505 int cloudId = iradarEcho->cloudId;
506 bool upgrade = (cloudId >> 5) & 1;
507 float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
510 if (iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
513 if (iradarEcho->lightning || lwc < LWClevel[level])
516 float radius = sqrt(iradarEcho->dist) * SG_METER_TO_NM * _scale;
517 float size = iradarEcho->radius * 2.0 * SG_METER_TO_NM * _scale;
519 if (radius - size > 180)
522 float angle = (iradarEcho->heading - _angle_offset) //* fovFactor
525 // Rotate echo into position, and rotate echo to have
526 // a constant orientation towards the
527 // airplane. Compass headings increase in clockwise
528 // direction, while graphics rotations follow
529 // right-hand (counter-clockwise) rule.
530 const osg::Vec2f texBase(col, (UNIT * (float) (4 + (cloudId & 3))));
532 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
533 * osg::Matrixf::translate(0.0f, radius, 0.0f)
534 * wxRotate(angle) * _centerTrans);
535 addQuad(_vertices, _texCoords, m, texBase);
537 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing clouds"
538 // << " ID=" << cloudId
541 // << " radius=" << radius
542 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
543 // << " heading=" << iradarEcho->heading * SG_RADIANS_TO_DEGREES
544 // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
549 // draw lightning echos
550 bool drawLightning = _Instrument->getBoolValue("lightning", true);
552 const osg::Vec2f texBase(3 * UNIT, 4 * UNIT);
554 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
555 if (!iradarEcho->lightning)
558 float size = UNIT * 0.5f;
559 float radius = iradarEcho->dist * _scale;
560 float angle = iradarEcho->heading * SG_DEGREES_TO_RADIANS
563 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
565 * osg::Matrixf::translate(0.0f, radius, 0.0f)
566 * wxRotate(angle) * _centerTrans);
567 addQuad(_vertices, _texCoords, m, texBase);
575 wxRadarBg::update_data(const SGPropertyNode *ac, double altitude, double heading,
576 double radius, double bearing, bool selected)
578 osgText::Text *callsign = new osgText::Text;
579 callsign->setFont(_font.get());
580 callsign->setFontResolution(12, 12);
581 callsign->setCharacterSize(_font_size);
582 callsign->setColor(selected ? osg::Vec4(1, 1, 1, 1) : _font_color);
583 osg::Matrixf m(wxRotate(-bearing)
584 * osg::Matrixf::translate(0.0f, radius, 0.0f)
585 * wxRotate(bearing) * _centerTrans);
587 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
588 // cast to int's, otherwise text comes out ugly
589 callsign->setPosition(osg::Vec3((int)pos.x(), (int)pos.y(), 0));
590 callsign->setAlignment(osgText::Text::LEFT_BOTTOM_BASE_LINE);
591 callsign->setLineSpacing(_font_spacing);
593 const char *identity = ac->getStringValue("transponder-id");
595 identity = ac->getStringValue("callsign");
598 text << identity << endl
599 << setprecision(0) << fixed
600 << setw(3) << setfill('0') << heading * SG_RADIANS_TO_DEGREES << "\xB0 "
601 << setw(0) << altitude << "ft" << endl
602 << ac->getDoubleValue("velocities/true-airspeed-kt") << "kts";
604 callsign->setText(text.str());
605 _textGeode->addDrawable(callsign);
610 wxRadarBg::update_aircraft()
613 double age_factor = 1.0;
621 if (!ground_echoes.empty()){
622 ground_echoes_iterator = ground_echoes.begin();
624 while(ground_echoes_iterator != ground_echoes.end()) {
625 diff = _elapsed_time - (*ground_echoes_iterator)->elapsed_time;
627 if( diff > _persistance) {
628 ground_echoes.erase(ground_echoes_iterator++);
630 // double test_brg = (*ground_echoes_iterator)->bearing;
631 // double bearing = test_brg * SG_DEGREES_TO_RADIANS;
632 // float angle = calcRelBearing(bearing, _view_heading);
633 double bumpinessFactor = (*ground_echoes_iterator)->bumpiness;
634 float heading = fgGetDouble("/orientation/heading-deg");
635 if ( _display_mode == BSCAN ){
636 test_rng = (*ground_echoes_iterator)->elevation * 6;
637 test_brg = (*ground_echoes_iterator)->bearing;
638 angle = calcRelBearingDeg(test_brg, heading) * 6;
639 range = sqrt(test_rng * test_rng + angle * angle);
640 bearing = atan2(angle, test_rng);
641 //cout << "angle " << angle <<" bearing "
642 // << bearing / SG_DEGREES_TO_RADIANS << endl;
643 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 240 * age_factor;
645 test_rng = (*ground_echoes_iterator)->range;
646 range = test_rng * SG_METER_TO_NM;
647 test_brg = (*ground_echoes_iterator)->bearing;
648 bearing = test_brg * SG_DEGREES_TO_RADIANS;
649 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 120 * age_factor;
650 bearing += _angle_offset;
653 float radius = range * _scale;
654 //double heading = 90 * SG_DEGREES_TO_RADIANS;
655 //heading += _angle_offset;
660 age_factor = 1 - (0.5 * diff/_persistance);
662 float size = echo_radius * UNIT;
664 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
665 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
666 * osg::Matrixf::translate(0.0f, radius, 0.0f)
667 * wxRotate(bearing) * _centerTrans);
668 addQuad(_vertices, _texCoords, m, texBase);
670 ++ground_echoes_iterator;
672 //cout << "test bearing " << test_brg
673 //<< " test_rng " << test_rng * SG_METER_TO_NM
674 //<< " persistance " << _persistance
681 if (!_ai_enabled_node->getBoolValue())
684 bool draw_tcas = _radar_tcas_node->getBoolValue();
685 bool draw_absolute = _radar_absalt_node->getBoolValue();
686 bool draw_echoes = _radar_position_node->getBoolValue();
687 bool draw_symbols = _radar_symbol_node->getBoolValue();
688 bool draw_data = _radar_data_node->getBoolValue();
689 if (!draw_echoes && !draw_symbols && !draw_data)
692 double user_lat = _user_lat_node->getDoubleValue();
693 double user_lon = _user_lon_node->getDoubleValue();
694 double user_alt = _user_alt_node->getDoubleValue();
696 float limit = _radar_coverage_node->getFloatValue();
701 limit *= SG_DEGREES_TO_RADIANS;
703 int selected_id = fgGetInt("/instrumentation/radar/selected-id", -1);
705 const SGPropertyNode *selected_ac = 0;
706 const SGPropertyNode *ai = fgGetNode("/ai/models", true);
708 for (int i = ai->nChildren() - 1; i >= -1; i--) {
709 const SGPropertyNode *model;
711 if (i < 0) { // last iteration: selected model
714 model = ai->getChild(i);
715 if (!model->nChildren())
717 if ((model->getIntValue("id") == selected_id)&&
719 selected_ac = model; // save selected model for last iteration
726 double echo_radius, sigma;
727 const string name = model->getName();
729 //cout << "name "<<name << endl;
730 if (name == "aircraft" || name == "tanker")
731 echo_radius = 1, sigma = 1;
732 else if (name == "multiplayer" || name == "wingman" || name == "static")
733 echo_radius = 1.5, sigma = 1;
734 else if (name == "ship" || name == "carrier" || name == "escort" ||name == "storm")
735 echo_radius = 1.5, sigma = 100;
736 else if (name == "thermal")
737 echo_radius = 2, sigma = 100;
738 else if (name == "rocket")
739 echo_radius = 0.1, sigma = 0.1;
740 else if (name == "ballistic")
741 echo_radius = 0.001, sigma = 0.001;
745 double lat = model->getDoubleValue("position/latitude-deg");
746 double lon = model->getDoubleValue("position/longitude-deg");
747 double alt = model->getDoubleValue("position/altitude-ft");
748 double heading = model->getDoubleValue("orientation/true-heading-deg");
750 double range, bearing;
751 calcRangeBearing(user_lat, user_lon, lat, lon, range, bearing);
752 //cout << _antenna_ht << _interval<< endl;
753 bool isVisible = withinRadarHorizon(user_alt, alt, range);
758 if (!inRadarRange(sigma, range))
761 bearing *= SG_DEGREES_TO_RADIANS;
762 heading *= SG_DEGREES_TO_RADIANS;
764 float radius = range * _scale;
765 float angle = calcRelBearing(bearing, _view_heading);
767 if (angle > limit || angle < -limit)
770 bearing += _angle_offset;
771 heading += _angle_offset;
773 bool is_tcas_contact = false;
776 is_tcas_contact = update_tcas(model,range,user_alt,alt,bearing,radius,draw_absolute);
780 if (draw_echoes && (!is_tcas_contact)) {
781 float size = echo_radius * 120 * UNIT;
783 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
784 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
785 * osg::Matrixf::translate(0.0f, radius, 0.0f)
786 * wxRotate(bearing) * _centerTrans);
787 addQuad(_vertices, _texCoords, m, texBase);
791 if (draw_symbols && (!draw_tcas)) {
792 const osg::Vec2f texBase(0, 3 * UNIT);
793 float size = 600 * UNIT;
794 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
795 * wxRotate(heading - bearing)
796 * osg::Matrixf::translate(0.0f, radius, 0.0f)
797 * wxRotate(bearing) * _centerTrans);
798 addQuad(_vertices, _texCoords, m, texBase);
801 if ((draw_data || i < 0)&& // selected one (i == -1) is always drawn
802 ((!draw_tcas)||(is_tcas_contact)||(draw_echoes)))
803 update_data(model, alt, heading, radius, bearing, i < 0);
807 /** Update TCAS display.
808 * Return true when processed as TCAS contact, false otherwise. */
810 wxRadarBg::update_tcas(const SGPropertyNode *model,double range,double user_alt,double alt,
811 double bearing,double radius,bool absMode)
815 // update TCAS symbol
817 threatLevel = model->getIntValue("tcas/threat-level",-1);
818 if (threatLevel == -1)
820 // no TCAS information (i.e. no transponder) => not visible to TCAS
823 int row = 7 - threatLevel;
825 double vspeed = model->getDoubleValue("velocities/vertical-speed-fps");
826 if (vspeed < -3.0) // descending
829 if (vspeed > 3.0) // climbing
831 texBase = osg::Vec2f(col*UNIT,row * UNIT);
832 float size = 200 * UNIT;
833 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
835 * osg::Matrixf::translate(0.0f, radius, 0.0f)
836 * wxRotate(bearing) * _centerTrans);
837 addQuad(_vertices, _texCoords, m, texBase);
842 osgText::Text *altStr = new osgText::Text;
843 altStr->setFont(_font.get());
844 altStr->setFontResolution(12, 12);
845 altStr->setCharacterSize(_font_size);
846 altStr->setColor(_tcas_colors[threatLevel]);
847 osg::Matrixf m(wxRotate(-bearing)
848 * osg::Matrixf::translate(0.0f, radius, 0.0f)
849 * wxRotate(bearing) * _centerTrans);
851 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
852 // cast to int's, otherwise text comes out ugly
853 altStr->setLineSpacing(_font_spacing);
856 altStr->setAlignment(osgText::Text::LEFT_CENTER);
857 int altDif = (alt-user_alt+50)/100;
872 altStr->setPosition(osg::Vec3((int)pos.x()-30, (int)pos.y()+dy, 0));
875 // absolute altitude display
876 text << setprecision(0) << fixed
877 << setw(3) << setfill('0') << alt/100 << endl;
879 else // relative altitude display
883 << setprecision(0) << fixed
884 << setw(2) << setfill('0') << altDif << endl;
887 altStr->setText(text.str());
888 _textGeode->addDrawable(altStr);
895 wxRadarBg::update_tacan()
898 int mode = _radar_mode_control_node->getIntValue();
899 bool inRange = _tacan_in_range_node->getBoolValue();
901 if (mode != 1 || !inRange)
904 float size = 600 * UNIT;
905 float radius = _tacan_distance_node->getFloatValue() * _scale;
906 float angle = _tacan_bearing_node->getFloatValue() * SG_DEGREES_TO_RADIANS
909 const osg::Vec2f texBase(1 * UNIT, 3 * UNIT);
910 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
912 * osg::Matrixf::translate(0.0f, radius, 0.0f)
913 * wxRotate(angle) * _centerTrans);
914 addQuad(_vertices, _texCoords, m, texBase);
916 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing TACAN"
917 // << " dist=" << radius
918 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
919 // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
920 // << " x=" << x << " y="<< y
921 // << " size=" << size);
926 wxRadarBg::update_heading_marker()
928 if (!_radar_hdg_marker_node->getBoolValue())
931 const osg::Vec2f texBase(2 * UNIT, 3 * UNIT);
932 float size = 600 * UNIT;
933 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
934 * wxRotate(_view_heading + _angle_offset));
937 addQuad(_vertices, _texCoords, m, texBase);
939 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing heading marker"
940 // << " x,y " << x <<","<< y
941 // << " dist" << dist
942 // << " view_heading" << _view_heading * SG_RADIANS_TO_DEGREES
943 // << " heading " << iradarEcho->heading * SG_RADIANS_TO_DEGREES
944 // << " angle " << angle * SG_RADIANS_TO_DEGREES);
949 wxRadarBg::center_map()
951 _lat = _user_lat_node->getDoubleValue();
952 _lon = _user_lon_node->getDoubleValue();
953 _x_offset = _y_offset = 0;
958 wxRadarBg::apply_map_offset()
960 double lat = _user_lat_node->getDoubleValue();
961 double lon = _user_lon_node->getDoubleValue();
962 double bearing, distance, az2;
963 geo_inverse_wgs_84(_lat, _lon, lat, lon, &bearing, &az2, &distance);
964 distance *= SG_METER_TO_NM * _scale;
965 bearing *= SG_DEGREES_TO_RADIANS;
966 _x_offset += sin(bearing) * distance;
967 _y_offset += cos(bearing) * distance;
974 wxRadarBg::withinRadarHorizon(double user_alt, double alt, double range_nm)
976 // Radar Horizon = 1.23(ht^1/2 + hr^1/2),
977 //don't allow negative altitudes (an approximation - yes altitudes can be negative)
978 // Allow antenna ht to be set, but only on ground
979 _antenna_ht = _Instrument->getDoubleValue("antenna-ht-ft");
982 user_alt = _antenna_ht;
985 alt = 0; // to allow some vertical extent of target
987 double radarhorizon = 1.23 * (sqrt(alt) + sqrt(user_alt));
988 // SG_LOG(SG_INSTR, SG_ALERT, "Radar: radar horizon " << radarhorizon);
989 return radarhorizon >= range_nm;
994 wxRadarBg::inRadarRange(double sigma, double range_nm)
996 //The Radar Equation:
998 // MaxRange^4 = (TxPower * AntGain^2 * lambda^2 * sigma)/((constant) * MDS)
1000 // Where (constant) = (4*pi)3 and MDS is the Minimum Detectable Signal power.
1002 // For a given radar we can assume that the only variable is sigma,
1003 // the target radar cross section.
1005 // Here, we will use a normalised rcs (sigma) for a standard taget and assume that this
1006 // will provide a maximum range of 35nm;
1008 // TODO - make the maximum range adjustable at runtime
1010 double constant = _radar_ref_rng;
1015 double maxrange = constant * pow(sigma, 0.25);
1016 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: max range " << maxrange);
1017 return maxrange >= range_nm;
1022 wxRadarBg::calcRangeBearing(double lat, double lon, double lat2, double lon2,
1023 double &range, double &bearing) const
1025 // calculate the bearing and range of the second pos from the first
1026 double az2, distance;
1027 geo_inverse_wgs_84(lat, lon, lat2, lon2, &bearing, &az2, &distance);
1028 range = distance *= SG_METER_TO_NM;
1033 wxRadarBg::calcRelBearing(float bearing, float heading)
1035 float angle = bearing - heading;
1038 angle -= 2.0 * SG_PI;
1041 angle += 2.0 * SG_PI;
1047 wxRadarBg::calcRelBearingDeg(float bearing, float heading)
1049 float angle = bearing - heading;
1052 return angle -= 360;
1055 return angle += 360;
1062 wxRadarBg::updateFont()
1064 float red = _font_node->getFloatValue("color/red");
1065 float green = _font_node->getFloatValue("color/green");
1066 float blue = _font_node->getFloatValue("color/blue");
1067 float alpha = _font_node->getFloatValue("color/alpha");
1068 _font_color.set(red, green, blue, alpha);
1070 _font_size = _font_node->getFloatValue("size");
1071 _font_spacing = _font_size * _font_node->getFloatValue("line-spacing");
1072 string path = _font_node->getStringValue("name", DEFAULT_FONT);
1075 if (path[0] != '/') {
1076 tpath = globals->get_fg_root();
1077 tpath.append("Fonts");
1083 #if (FG_OSG_VERSION >= 21000)
1084 osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
1085 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str(), fontOptions.get());
1087 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str());
1092 _font->setMinFilterHint(osg::Texture::NEAREST);
1093 _font->setMagFilterHint(osg::Texture::NEAREST);
1094 _font->setGlyphImageMargin(0);
1095 _font->setGlyphImageMarginRatio(0);
1098 for (int i=0;i<4;i++)
1100 const float defaultColors[4][3] = {{0,1,1},{0,1,1},{1,0.5,0},{1,0,0}};
1101 SGPropertyNode_ptr color_node = _font_node->getNode("tcas/color",i,true);
1102 float red = color_node->getFloatValue("red",defaultColors[i][0]);
1103 float green = color_node->getFloatValue("green",defaultColors[i][1]);
1104 float blue = color_node->getFloatValue("blue",defaultColors[i][2]);
1105 float alpha = color_node->getFloatValue("alpha",1);
1106 _tcas_colors[i]=osg::Vec4(red, green, blue, alpha);
1111 wxRadarBg::valueChanged(SGPropertyNode*)