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>
60 #include "panel.hxx" // for FGTextureManager
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";
72 wxRadarBg::wxRadarBg(SGPropertyNode *node) :
73 _name(node->getStringValue("name", "radar")),
74 _num(node->getIntValue("number", 0)),
76 _interval(node->getDoubleValue("update-interval-sec", 1.0)),
89 _antenna_ht(node->getDoubleValue("antenna-ht-ft", 0.0)),
96 branch = "/instrumentation/" + _name;
97 _Instrument = fgGetNode(branch.c_str(), _num, true);
99 const char *tacan_source = node->getStringValue("tacan-source", "/instrumentation/tacan");
100 _Tacan = fgGetNode(tacan_source, true);
102 _font_node = _Instrument->getNode("font", true);
104 #define INITFONT(p, val, type) if (!_font_node->hasValue(p)) _font_node->set##type##Value(p, val)
105 INITFONT("name", DEFAULT_FONT, String);
106 INITFONT("size", 8, Float);
107 INITFONT("line-spacing", 0.25, Float);
108 INITFONT("color/red", 0, Float);
109 INITFONT("color/green", 0.8, Float);
110 INITFONT("color/blue", 0, Float);
111 INITFONT("color/alpha", 1, Float);
114 _font_node->addChangeListener(this, true);
118 wxRadarBg::~wxRadarBg ()
120 _font_node->removeChangeListener(this);
127 _serviceable_node = _Instrument->getNode("serviceable", true);
128 _sceneryLoaded = fgGetNode("/sim/sceneryloaded", true);
130 // texture name to use in 2D and 3D instruments
131 _texture_path = _Instrument->getStringValue("radar-texture-path",
132 "Aircraft/Instruments/Textures/od_wxradar.rgb");
133 _resultTexture = FGTextureManager::createTexture(_texture_path.c_str(), false);
135 string path = _Instrument->getStringValue("echo-texture-path",
136 "Aircraft/Instruments/Textures/wxecho.rgb");
137 SGPath tpath = globals->resolve_aircraft_path(path);
139 // no mipmap or else alpha will mix with pixels on the border of shapes, ruining the effect
140 _wxEcho = SGLoadTexture2D(tpath, NULL, false, false);
143 _Instrument->setFloatValue("trk", 0.0);
144 _Instrument->setFloatValue("tilt", 0.0);
145 _Instrument->setStringValue("status", "");
146 // those properties are used by a radar instrument of a MFD
147 // input switch = OFF | TST | STBY | ON
148 // input mode = WX | WXA | MAP
149 // output status = STBY | TEST | WX | WXA | MAP | blank
150 // input lightning = true | false
151 // input TRK = +/- n degrees
152 // input TILT = +/- n degree
153 // input autotilt = true | false
154 // input range = n nm (20/40/80)
155 // input display-mode = arc | rose | map | plan
157 _odg = new FGODGauge;
160 _ai_enabled_node = fgGetNode("/sim/ai/enabled", true);
162 _user_lat_node = fgGetNode("/position/latitude-deg", true);
163 _user_lon_node = fgGetNode("/position/longitude-deg", true);
164 _user_alt_node = fgGetNode("/position/altitude-ft", true);
166 _user_speed_east_fps_node = fgGetNode("/velocities/speed-east-fps", true);
167 _user_speed_north_fps_node = fgGetNode("/velocities/speed-north-fps", true);
169 _tacan_serviceable_node = _Tacan->getNode("serviceable", true);
170 _tacan_distance_node = _Tacan->getNode("indicated-distance-nm", true);
171 _tacan_name_node = _Tacan->getNode("name", true);
172 _tacan_bearing_node = _Tacan->getNode("indicated-bearing-true-deg", true);
173 _tacan_in_range_node = _Tacan->getNode("in-range", true);
175 _radar_mode_control_node = _Instrument->getNode("mode-control", true);
176 _radar_coverage_node = _Instrument->getNode("limit-deg", true);
177 _radar_ref_rng_node = _Instrument->getNode("reference-range-nm", true);
178 _radar_hdg_marker_node = _Instrument->getNode("heading-marker", true);
180 SGPropertyNode *n = _Instrument->getNode("display-controls", true);
181 _radar_weather_node = n->getNode("WX", true);
182 _radar_position_node = n->getNode("pos", true);
183 _radar_data_node = n->getNode("data", true);
184 _radar_symbol_node = n->getNode("symbol", true);
185 _radar_centre_node = n->getNode("centre", true);
186 _radar_rotate_node = n->getNode("rotate", true);
187 _radar_tcas_node = n->getNode("tcas", true);
188 _radar_absalt_node = n->getNode("abs-altitude", true);
190 _radar_centre_node->setBoolValue(false);
191 if (!_radar_coverage_node->hasValue())
192 _radar_coverage_node->setFloatValue(120);
193 if (!_radar_ref_rng_node->hasValue())
194 _radar_ref_rng_node->setDoubleValue(35);
195 if (!_radar_hdg_marker_node->hasValue())
196 _radar_hdg_marker_node->setBoolValue(true);
201 // OSG geometry setup. The polygons for the radar returns will be
202 // stored in a single Geometry. The geometry will have several
203 // primitive sets so we can have different kinds of polys and
204 // choose a different overall color for each set.
205 _radarGeode = new osg::Geode;
206 osg::StateSet *stateSet = _radarGeode->getOrCreateStateSet();
207 stateSet->setTextureAttributeAndModes(0, _wxEcho.get());
208 _geom = new osg::Geometry;
209 _geom->setUseDisplayList(false);
210 // Initially allocate space for 128 quads
211 _vertices = new osg::Vec2Array;
212 _vertices->setDataVariance(osg::Object::DYNAMIC);
213 _vertices->reserve(128 * 4);
214 _geom->setVertexArray(_vertices);
215 _texCoords = new osg::Vec2Array;
216 _texCoords->setDataVariance(osg::Object::DYNAMIC);
217 _texCoords->reserve(128 * 4);
218 _geom->setTexCoordArray(0, _texCoords);
219 osg::Vec3Array *colors = new osg::Vec3Array;
220 colors->push_back(osg::Vec3(1.0f, 1.0f, 1.0f)); // color of echos
221 colors->push_back(osg::Vec3(1.0f, 0.0f, 0.0f)); // arc mask
222 colors->push_back(osg::Vec3(0.0f, 0.0f, 0.0f)); // rest of mask
223 _geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
224 _geom->setColorArray(colors);
225 osg::PrimitiveSet *pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
226 pset->setDataVariance(osg::Object::DYNAMIC);
227 _geom->addPrimitiveSet(pset);
228 pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
229 pset->setDataVariance(osg::Object::DYNAMIC);
230 _geom->addPrimitiveSet(pset);
231 pset = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES);
232 pset->setDataVariance(osg::Object::DYNAMIC);
233 _geom->addPrimitiveSet(pset);
234 _geom->setInitialBound(osg::BoundingBox(osg::Vec3f(-256.0f, -256.0f, 0.0f),
235 osg::Vec3f(256.0f, 256.0f, 0.0f)));
236 _radarGeode->addDrawable(_geom);
238 // Texture in the 2D panel system
239 FGTextureManager::addTexture(_texture_path.c_str(), _odg->getTexture());
241 _textGeode = new osg::Geode;
243 osg::Camera *camera = _odg->getCamera();
244 camera->addChild(_radarGeode.get());
245 camera->addChild(_textGeode.get());
251 void wxRadarBg::shutdown()
257 // Local coordinates for each echo
258 const osg::Vec3f echoCoords[4] = {
259 osg::Vec3f(-.7f, -.7f, 0.0f), osg::Vec3f(.7f, -.7f, 0.0f),
260 osg::Vec3f(.7f, .7f, 0.0f), osg::Vec3f(-.7f, .7f, 0.0f)
264 const osg::Vec2f echoTexCoords[4] = {
265 osg::Vec2f(0.0f, 0.0f), osg::Vec2f(UNIT, 0.0f),
266 osg::Vec2f(UNIT, UNIT), osg::Vec2f(0.0f, UNIT)
272 addQuad(osg::Vec2Array *vertices, osg::Vec2Array *texCoords,
273 const osg::Matrixf& transform, const osg::Vec2f& texBase)
275 for (int i = 0; i < 4; i++) {
276 const osg::Vec3f coords = transform.preMult(echoCoords[i]);
277 texCoords->push_back(texBase + echoTexCoords[i]);
278 vertices->push_back(osg::Vec2f(coords.x(), coords.y()));
283 // Rotate by a heading value
285 osg::Matrixf wxRotate(float angle)
287 return osg::Matrixf::rotate(angle, 0.0f, 0.0f, -1.0f);
292 wxRadarBg::update (double delta_time_sec)
294 if (!_sceneryLoaded->getBoolValue())
297 if (!_odg || !_serviceable_node->getBoolValue()) {
298 _Instrument->setStringValue("status", "");
302 _time += delta_time_sec;
303 if (_time < _interval)
308 string mode = _Instrument->getStringValue("display-mode", "arc");
310 if (_display_mode != MAP) {
314 } else if (mode == "plan") {
315 _display_mode = PLAN;}
316 else if (mode == "bscan") {
317 _display_mode = BSCAN;
322 string switchKnob = _Instrument->getStringValue("switch", "on");
323 if (switchKnob == "off") {
324 _Instrument->setStringValue("status", "");
325 } else if (switchKnob == "stby") {
326 _Instrument->setStringValue("status", "STBY");
327 } else if (switchKnob == "tst") {
328 _Instrument->setStringValue("status", "TST");
329 // find something interesting to do...
331 float r = _Instrument->getFloatValue("range", 40.0);
332 if (r != _range_nm) {
337 _radar_ref_rng = _radar_ref_rng_node->getDoubleValue();
338 _view_heading = fgGetDouble("/orientation/heading-deg") * SG_DEGREES_TO_RADIANS;
339 _centerTrans.makeTranslate(0.0f, 0.0f, 0.0f);
341 _scale = 200.0 / _range_nm;
344 if (_display_mode == ARC) {
345 _scale = 2*200.0f / _range_nm;
346 _angle_offset = -_view_heading;
347 _centerTrans.makeTranslate(0.0f, -200.0f, 0.0f);
349 } else if (_display_mode == MAP) {
352 bool centre = _radar_centre_node->getBoolValue();
355 _radar_centre_node->setBoolValue(false);
358 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: displacement "
359 // << _x_offset <<", "<<_y_offset
360 // << " user_speed_east_fps * SG_FPS_TO_KT "
361 // << user_speed_east_fps * SG_FPS_TO_KT
362 // << " user_speed_north_fps * SG_FPS_TO_KT "
363 // << user_speed_north_fps * SG_FPS_TO_KT
364 // << " dt " << delta_time_sec);
366 _centerTrans.makeTranslate(_x_offset, _y_offset, 0.0f);
368 } else if (_display_mode == PLAN) {
369 if (_radar_rotate_node->getBoolValue()) {
370 _angle_offset = -_view_heading;
372 } else if (_display_mode == BSCAN) {
373 _angle_offset = -_view_heading;
380 _textGeode->removeDrawables(0, _textGeode->getNumDrawables());
383 //TODO FIXME Mask below (only used for ARC mode) isn't properly aligned, i.e.
384 // it assumes the a/c position at the center of the display - though it's somewhere at
385 // bottom part for ARC mode.
386 // The mask hadn't worked at all for a while (probably since the OSG port) due to
387 // another bug (which is fixed now). Now, the mask is disabled completely until s.o.
388 // adapted the coordinates below. And the mask is only really useful to limit displayed
389 // weather blobs (not support yet).
390 // Aircraft echos are already limited properly through wxradar's "limit-deg" property.
392 osg::DrawArrays *maskPSet
393 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(1));
394 osg::DrawArrays *trimaskPSet
395 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(2));
397 if (_display_mode == ARC) {
398 // erase what is out of sight of antenna
408 float xOffset = 256.0f;
409 float yOffset = 200.0f;
411 int firstQuadVert = _vertices->size();
412 _texCoords->push_back(osg::Vec2f(0.5f, 0.25f));
413 _vertices->push_back(osg::Vec2f(-xOffset, 0.0 + yOffset));
414 _texCoords->push_back(osg::Vec2f(1.0f, 0.25f));
415 _vertices->push_back(osg::Vec2f(xOffset, 0.0 + yOffset));
416 _texCoords->push_back(osg::Vec2f(1.0f, 0.5f));
417 _vertices->push_back(osg::Vec2f(xOffset, 256.0 + yOffset));
418 _texCoords->push_back(osg::Vec2f(0.5f, 0.5f));
419 _vertices->push_back(osg::Vec2f(-xOffset, 256.0 + yOffset));
420 maskPSet->set(osg::PrimitiveSet::QUADS, firstQuadVert, 4);
423 // The triangles aren't supposed to be textured, but there's
424 // no need to set up a different Geometry, switch modes,
425 // etc. I happen to know that there's a white pixel in the
426 // texture at 1.0, 0.0 :)
427 float centerY = tan(30 * SG_DEGREES_TO_RADIANS);
428 _vertices->push_back(osg::Vec2f(0.0, 0.0));
429 _vertices->push_back(osg::Vec2f(-256.0, 0.0));
430 _vertices->push_back(osg::Vec2f(-256.0, 256.0 * centerY));
432 _vertices->push_back(osg::Vec2f(0.0, 0.0));
433 _vertices->push_back(osg::Vec2f(256.0, 0.0));
434 _vertices->push_back(osg::Vec2f(256.0, 256.0 * centerY));
436 _vertices->push_back(osg::Vec2f(-256, 0.0));
437 _vertices->push_back(osg::Vec2f(256.0, 0.0));
438 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
440 _vertices->push_back(osg::Vec2f(256, 0.0));
441 _vertices->push_back(osg::Vec2f(256.0, -256.0));
442 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
444 const osg::Vec2f whiteSpot(1.0f, 0.0f);
445 for (int i = 0; i < 3 * 4; i++)
446 _texCoords->push_back(whiteSpot);
448 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, firstQuadVert, 3 * 4);
452 maskPSet->set(osg::PrimitiveSet::QUADS, 0, 0);
453 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, 0, 0);
457 trimaskPSet->dirty();
461 // remember index of next vertex
462 int vIndex = _vertices->size();
466 osg::DrawArrays *quadPSet
467 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(0));
471 update_heading_marker();
473 // draw all new vertices are quads
474 quadPSet->set(osg::PrimitiveSet::QUADS, vIndex, _vertices->size()-vIndex);
481 wxRadarBg::update_weather()
483 string modeButton = _Instrument->getStringValue("mode", "WX");
484 // FIXME: implementation of radar echoes missing
485 // _radarEchoBuffer = *sgEnviro.get_radar_echo();
487 // pretend we have a scan angle bigger then the FOV
488 // TODO:check real fov, enlarge if < nn, and do clipping if > mm
489 // const float fovFactor = 1.45f;
490 _Instrument->setStringValue("status", modeButton.c_str());
492 // FIXME: implementation of radar echoes missing
494 list_of_SGWxRadarEcho *radarEcho = &_radarEchoBuffer;
495 list_of_SGWxRadarEcho::iterator iradarEcho, end = radarEcho->end();
496 const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
498 // draw the cloud radar echo
499 bool drawClouds = _radar_weather_node->getBoolValue();
502 // we do that in 3 passes, one for each color level
503 // this is to 'merge' same colors together
504 for (int level = 0; level <= 2; level++) {
505 float col = level * UNIT;
507 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
508 int cloudId = iradarEcho->cloudId;
509 bool upgrade = (cloudId >> 5) & 1;
510 float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
513 if (iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
516 if (iradarEcho->lightning || lwc < LWClevel[level])
519 float radius = sqrt(iradarEcho->dist) * SG_METER_TO_NM * _scale;
520 float size = iradarEcho->radius * 2.0 * SG_METER_TO_NM * _scale;
522 if (radius - size > 180)
525 float angle = (iradarEcho->heading - _angle_offset) //* fovFactor
528 // Rotate echo into position, and rotate echo to have
529 // a constant orientation towards the
530 // airplane. Compass headings increase in clockwise
531 // direction, while graphics rotations follow
532 // right-hand (counter-clockwise) rule.
533 const osg::Vec2f texBase(col, (UNIT * (float) (4 + (cloudId & 3))));
535 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
536 * osg::Matrixf::translate(0.0f, radius, 0.0f)
537 * wxRotate(angle) * _centerTrans);
538 addQuad(_vertices, _texCoords, m, texBase);
540 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing clouds"
541 // << " ID=" << cloudId
544 // << " radius=" << radius
545 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
546 // << " heading=" << iradarEcho->heading * SG_RADIANS_TO_DEGREES
547 // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
552 // draw lightning echos
553 bool drawLightning = _Instrument->getBoolValue("lightning", true);
555 const osg::Vec2f texBase(3 * UNIT, 4 * UNIT);
557 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
558 if (!iradarEcho->lightning)
561 float size = UNIT * 0.5f;
562 float radius = iradarEcho->dist * _scale;
563 float angle = iradarEcho->heading * SG_DEGREES_TO_RADIANS
566 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
568 * osg::Matrixf::translate(0.0f, radius, 0.0f)
569 * wxRotate(angle) * _centerTrans);
570 addQuad(_vertices, _texCoords, m, texBase);
578 wxRadarBg::update_data(const SGPropertyNode *ac, double altitude, double heading,
579 double radius, double bearing, bool selected)
581 osgText::Text *callsign = new osgText::Text;
582 callsign->setFont(_font.get());
583 callsign->setFontResolution(12, 12);
584 callsign->setCharacterSize(_font_size);
585 callsign->setColor(selected ? osg::Vec4(1, 1, 1, 1) : _font_color);
586 osg::Matrixf m(wxRotate(-bearing)
587 * osg::Matrixf::translate(0.0f, radius, 0.0f)
588 * wxRotate(bearing) * _centerTrans);
590 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
591 // cast to int's, otherwise text comes out ugly
592 callsign->setPosition(osg::Vec3((int)pos.x(), (int)pos.y(), 0));
593 callsign->setAlignment(osgText::Text::LEFT_BOTTOM_BASE_LINE);
594 callsign->setLineSpacing(_font_spacing);
596 const char *identity = ac->getStringValue("transponder-id");
598 identity = ac->getStringValue("callsign");
601 text << identity << endl
602 << setprecision(0) << fixed
603 << setw(3) << setfill('0') << heading * SG_RADIANS_TO_DEGREES << "\xB0 "
604 << setw(0) << altitude << "ft" << endl
605 << ac->getDoubleValue("velocities/true-airspeed-kt") << "kts";
607 callsign->setText(text.str());
608 _textGeode->addDrawable(callsign);
613 wxRadarBg::update_aircraft()
616 double age_factor = 1.0;
624 if (!ground_echoes.empty()){
625 ground_echoes_iterator = ground_echoes.begin();
627 while(ground_echoes_iterator != ground_echoes.end()) {
628 diff = _elapsed_time - (*ground_echoes_iterator)->elapsed_time;
630 if( diff > _persistance) {
631 ground_echoes.erase(ground_echoes_iterator++);
633 // double test_brg = (*ground_echoes_iterator)->bearing;
634 // double bearing = test_brg * SG_DEGREES_TO_RADIANS;
635 // float angle = calcRelBearing(bearing, _view_heading);
636 double bumpinessFactor = (*ground_echoes_iterator)->bumpiness;
637 float heading = fgGetDouble("/orientation/heading-deg");
638 if ( _display_mode == BSCAN ){
639 test_rng = (*ground_echoes_iterator)->elevation * 6;
640 test_brg = (*ground_echoes_iterator)->bearing;
641 angle = calcRelBearingDeg(test_brg, heading) * 6;
642 range = sqrt(test_rng * test_rng + angle * angle);
643 bearing = atan2(angle, test_rng);
644 //cout << "angle " << angle <<" bearing "
645 // << bearing / SG_DEGREES_TO_RADIANS << endl;
646 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 240 * age_factor;
648 test_rng = (*ground_echoes_iterator)->range;
649 range = test_rng * SG_METER_TO_NM;
650 test_brg = (*ground_echoes_iterator)->bearing;
651 bearing = test_brg * SG_DEGREES_TO_RADIANS;
652 echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 120 * age_factor;
653 bearing += _angle_offset;
656 float radius = range * _scale;
657 //double heading = 90 * SG_DEGREES_TO_RADIANS;
658 //heading += _angle_offset;
663 age_factor = 1 - (0.5 * diff/_persistance);
665 float size = echo_radius * UNIT;
667 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
668 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
669 * osg::Matrixf::translate(0.0f, radius, 0.0f)
670 * wxRotate(bearing) * _centerTrans);
671 addQuad(_vertices, _texCoords, m, texBase);
673 ++ground_echoes_iterator;
675 //cout << "test bearing " << test_brg
676 //<< " test_rng " << test_rng * SG_METER_TO_NM
677 //<< " persistance " << _persistance
684 if (!_ai_enabled_node->getBoolValue())
687 bool draw_tcas = _radar_tcas_node->getBoolValue();
688 bool draw_absolute = _radar_absalt_node->getBoolValue();
689 bool draw_echoes = _radar_position_node->getBoolValue();
690 bool draw_symbols = _radar_symbol_node->getBoolValue();
691 bool draw_data = _radar_data_node->getBoolValue();
692 if (!draw_echoes && !draw_symbols && !draw_data)
695 double user_lat = _user_lat_node->getDoubleValue();
696 double user_lon = _user_lon_node->getDoubleValue();
697 double user_alt = _user_alt_node->getDoubleValue();
699 float limit = _radar_coverage_node->getFloatValue();
704 limit *= SG_DEGREES_TO_RADIANS;
706 int selected_id = fgGetInt("/instrumentation/radar/selected-id", -1);
708 const SGPropertyNode *selected_ac = 0;
709 const SGPropertyNode *ai = fgGetNode("/ai/models", true);
711 for (int i = ai->nChildren() - 1; i >= -1; i--) {
712 const SGPropertyNode *model;
714 if (i < 0) { // last iteration: selected model
717 model = ai->getChild(i);
718 if (!model->nChildren())
720 if ((model->getIntValue("id") == selected_id)&&
722 selected_ac = model; // save selected model for last iteration
729 double echo_radius, sigma;
730 const string name = model->getName();
732 //cout << "name "<<name << endl;
733 if (name == "aircraft" || name == "tanker")
734 echo_radius = 1, sigma = 1;
735 else if (name == "multiplayer" || name == "wingman" || name == "static")
736 echo_radius = 1.5, sigma = 1;
737 else if (name == "ship" || name == "carrier" || name == "escort" ||name == "storm")
738 echo_radius = 1.5, sigma = 100;
739 else if (name == "thermal")
740 echo_radius = 2, sigma = 100;
741 else if (name == "rocket")
742 echo_radius = 0.1, sigma = 0.1;
743 else if (name == "ballistic")
744 echo_radius = 0.001, sigma = 0.001;
748 double lat = model->getDoubleValue("position/latitude-deg");
749 double lon = model->getDoubleValue("position/longitude-deg");
750 double alt = model->getDoubleValue("position/altitude-ft");
751 double heading = model->getDoubleValue("orientation/true-heading-deg");
753 double range, bearing;
754 calcRangeBearing(user_lat, user_lon, lat, lon, range, bearing);
755 //cout << _antenna_ht << _interval<< endl;
756 bool isVisible = withinRadarHorizon(user_alt, alt, range);
761 if (!inRadarRange(sigma, range))
764 bearing *= SG_DEGREES_TO_RADIANS;
765 heading *= SG_DEGREES_TO_RADIANS;
767 float radius = range * _scale;
768 float angle = calcRelBearing(bearing, _view_heading);
770 if (angle > limit || angle < -limit)
773 bearing += _angle_offset;
774 heading += _angle_offset;
776 bool is_tcas_contact = false;
779 is_tcas_contact = update_tcas(model,range,user_alt,alt,bearing,radius,draw_absolute);
783 if (draw_echoes && (!is_tcas_contact)) {
784 float size = echo_radius * 120 * UNIT;
786 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
787 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
788 * osg::Matrixf::translate(0.0f, radius, 0.0f)
789 * wxRotate(bearing) * _centerTrans);
790 addQuad(_vertices, _texCoords, m, texBase);
794 if (draw_symbols && (!draw_tcas)) {
795 const osg::Vec2f texBase(0, 3 * UNIT);
796 float size = 600 * UNIT;
797 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
798 * wxRotate(heading - bearing)
799 * osg::Matrixf::translate(0.0f, radius, 0.0f)
800 * wxRotate(bearing) * _centerTrans);
801 addQuad(_vertices, _texCoords, m, texBase);
804 if ((draw_data || i < 0)&& // selected one (i == -1) is always drawn
805 ((!draw_tcas)||(is_tcas_contact)||(draw_echoes)))
806 update_data(model, alt, heading, radius, bearing, i < 0);
810 /** Update TCAS display.
811 * Return true when processed as TCAS contact, false otherwise. */
813 wxRadarBg::update_tcas(const SGPropertyNode *model,double range,double user_alt,double alt,
814 double bearing,double radius,bool absMode)
818 // update TCAS symbol
820 threatLevel = model->getIntValue("tcas/threat-level",-1);
821 if (threatLevel == -1)
823 // no TCAS information (i.e. no transponder) => not visible to TCAS
826 int row = 7 - threatLevel;
828 double vspeed = model->getDoubleValue("velocities/vertical-speed-fps");
829 if (vspeed < -3.0) // descending
832 if (vspeed > 3.0) // climbing
834 texBase = osg::Vec2f(col*UNIT,row * UNIT);
835 float size = 200 * UNIT;
836 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
838 * osg::Matrixf::translate(0.0f, radius, 0.0f)
839 * wxRotate(bearing) * _centerTrans);
840 addQuad(_vertices, _texCoords, m, texBase);
845 osgText::Text *altStr = new osgText::Text;
846 altStr->setFont(_font.get());
847 altStr->setFontResolution(12, 12);
848 altStr->setCharacterSize(_font_size);
849 altStr->setColor(_tcas_colors[threatLevel]);
850 osg::Matrixf m(wxRotate(-bearing)
851 * osg::Matrixf::translate(0.0f, radius, 0.0f)
852 * wxRotate(bearing) * _centerTrans);
854 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
855 // cast to int's, otherwise text comes out ugly
856 altStr->setLineSpacing(_font_spacing);
859 altStr->setAlignment(osgText::Text::LEFT_CENTER);
860 int altDif = (alt-user_alt+50)/100;
875 altStr->setPosition(osg::Vec3((int)pos.x()-30, (int)pos.y()+dy, 0));
878 // absolute altitude display
879 text << setprecision(0) << fixed
880 << setw(3) << setfill('0') << alt/100 << endl;
882 else // relative altitude display
886 << setprecision(0) << fixed
887 << setw(2) << setfill('0') << altDif << endl;
890 altStr->setText(text.str());
891 _textGeode->addDrawable(altStr);
898 wxRadarBg::update_tacan()
901 int mode = _radar_mode_control_node->getIntValue();
902 bool inRange = _tacan_in_range_node->getBoolValue();
904 if (mode != 1 || !inRange)
907 float size = 600 * UNIT;
908 float radius = _tacan_distance_node->getFloatValue() * _scale;
909 float angle = _tacan_bearing_node->getFloatValue() * SG_DEGREES_TO_RADIANS
912 const osg::Vec2f texBase(1 * UNIT, 3 * UNIT);
913 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
915 * osg::Matrixf::translate(0.0f, radius, 0.0f)
916 * wxRotate(angle) * _centerTrans);
917 addQuad(_vertices, _texCoords, m, texBase);
919 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing TACAN"
920 // << " dist=" << radius
921 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
922 // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
923 // << " x=" << x << " y="<< y
924 // << " size=" << size);
929 wxRadarBg::update_heading_marker()
931 if (!_radar_hdg_marker_node->getBoolValue())
934 const osg::Vec2f texBase(2 * UNIT, 3 * UNIT);
935 float size = 600 * UNIT;
936 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
937 * wxRotate(_view_heading + _angle_offset));
940 addQuad(_vertices, _texCoords, m, texBase);
942 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing heading marker"
943 // << " x,y " << x <<","<< y
944 // << " dist" << dist
945 // << " view_heading" << _view_heading * SG_RADIANS_TO_DEGREES
946 // << " heading " << iradarEcho->heading * SG_RADIANS_TO_DEGREES
947 // << " angle " << angle * SG_RADIANS_TO_DEGREES);
952 wxRadarBg::center_map()
954 _lat = _user_lat_node->getDoubleValue();
955 _lon = _user_lon_node->getDoubleValue();
956 _x_offset = _y_offset = 0;
961 wxRadarBg::apply_map_offset()
963 double lat = _user_lat_node->getDoubleValue();
964 double lon = _user_lon_node->getDoubleValue();
965 double bearing, distance, az2;
966 geo_inverse_wgs_84(_lat, _lon, lat, lon, &bearing, &az2, &distance);
967 distance *= SG_METER_TO_NM * _scale;
968 bearing *= SG_DEGREES_TO_RADIANS;
969 _x_offset += sin(bearing) * distance;
970 _y_offset += cos(bearing) * distance;
977 wxRadarBg::withinRadarHorizon(double user_alt, double alt, double range_nm)
979 // Radar Horizon = 1.23(ht^1/2 + hr^1/2),
980 //don't allow negative altitudes (an approximation - yes altitudes can be negative)
981 // Allow antenna ht to be set, but only on ground
982 _antenna_ht = _Instrument->getDoubleValue("antenna-ht-ft");
985 user_alt = _antenna_ht;
988 alt = 0; // to allow some vertical extent of target
990 double radarhorizon = 1.23 * (sqrt(alt) + sqrt(user_alt));
991 // SG_LOG(SG_INSTR, SG_ALERT, "Radar: radar horizon " << radarhorizon);
992 return radarhorizon >= range_nm;
997 wxRadarBg::inRadarRange(double sigma, double range_nm)
999 //The Radar Equation:
1001 // MaxRange^4 = (TxPower * AntGain^2 * lambda^2 * sigma)/((constant) * MDS)
1003 // Where (constant) = (4*pi)3 and MDS is the Minimum Detectable Signal power.
1005 // For a given radar we can assume that the only variable is sigma,
1006 // the target radar cross section.
1008 // Here, we will use a normalised rcs (sigma) for a standard taget and assume that this
1009 // will provide a maximum range of 35nm;
1011 // TODO - make the maximum range adjustable at runtime
1013 double constant = _radar_ref_rng;
1018 double maxrange = constant * pow(sigma, 0.25);
1019 //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: max range " << maxrange);
1020 return maxrange >= range_nm;
1025 wxRadarBg::calcRangeBearing(double lat, double lon, double lat2, double lon2,
1026 double &range, double &bearing) const
1028 // calculate the bearing and range of the second pos from the first
1029 double az2, distance;
1030 geo_inverse_wgs_84(lat, lon, lat2, lon2, &bearing, &az2, &distance);
1031 range = distance *= SG_METER_TO_NM;
1036 wxRadarBg::calcRelBearing(float bearing, float heading)
1038 float angle = bearing - heading;
1041 angle -= 2.0 * SG_PI;
1044 angle += 2.0 * SG_PI;
1050 wxRadarBg::calcRelBearingDeg(float bearing, float heading)
1052 float angle = bearing - heading;
1055 return angle -= 360;
1058 return angle += 360;
1065 wxRadarBg::updateFont()
1067 float red = _font_node->getFloatValue("color/red");
1068 float green = _font_node->getFloatValue("color/green");
1069 float blue = _font_node->getFloatValue("color/blue");
1070 float alpha = _font_node->getFloatValue("color/alpha");
1071 _font_color.set(red, green, blue, alpha);
1073 _font_size = _font_node->getFloatValue("size");
1074 _font_spacing = _font_size * _font_node->getFloatValue("line-spacing");
1075 string path = _font_node->getStringValue("name", DEFAULT_FONT);
1078 if (path[0] != '/') {
1079 tpath = globals->get_fg_root();
1080 tpath.append("Fonts");
1086 osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
1087 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str(), fontOptions.get());
1091 _font->setMinFilterHint(osg::Texture::NEAREST);
1092 _font->setMagFilterHint(osg::Texture::NEAREST);
1093 _font->setGlyphImageMargin(0);
1094 _font->setGlyphImageMarginRatio(0);
1097 for (int i=0;i<4;i++)
1099 const float defaultColors[4][3] = {{0,1,1},{0,1,1},{1,0.5,0},{1,0,0}};
1100 SGPropertyNode_ptr color_node = _font_node->getNode("tcas/color",i,true);
1101 float red = color_node->getFloatValue("red",defaultColors[i][0]);
1102 float green = color_node->getFloatValue("green",defaultColors[i][1]);
1103 float blue = color_node->getFloatValue("blue",defaultColors[i][2]);
1104 float alpha = color_node->getFloatValue("alpha",1);
1105 _tcas_colors[i]=osg::Vec4(red, green, blue, alpha);
1110 wxRadarBg::valueChanged(SGPropertyNode*)