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 SG_USING_STD(stringstream);
51 SG_USING_STD(setprecision);
54 SG_USING_STD(setfill);
56 #include <Main/fg_props.hxx>
57 #include <Main/globals.hxx>
58 #include <Cockpit/panel.hxx>
59 #include <Cockpit/hud.hxx>
60 #include <AIModel/AIBase.hxx>
61 #include <AIModel/AIManager.hxx>
62 #include <AIModel/AIBallistic.hxx>
64 #include <Include/general.hxx>
65 #include "instrument_mgr.hxx"
66 #include "od_gauge.hxx"
67 #include "wxradar.hxx"
70 typedef list <SGSharedPtr<FGAIBase> > radar_list_type;
71 typedef radar_list_type::iterator radar_list_iterator;
72 typedef radar_list_type::const_iterator radar_list_const_iterator;
75 static const float UNIT = 1.0f / 8.0f; // 8 symbols in a row/column in the texture
76 static const char *DEFAULT_FONT = "typewriter.txf";
78 wxRadarBg::wxRadarBg ( SGPropertyNode *node) :
79 _name(node->getStringValue("name", "radar")),
80 _num(node->getIntValue("number", 0)),
81 _interval(node->getDoubleValue("update-interval-sec", 1.0)),
83 _last_switchKnob( "off" ),
84 _sim_init_done ( false ),
89 const char *tacan_source = node->getStringValue("tacan-source",
90 "/instrumentation/tacan");
91 _Tacan = fgGetNode(tacan_source, true);
95 wxRadarBg::~wxRadarBg ()
97 if (_radar_font_node != 0) {
98 _radar_font_node->removeChangeListener(this);
107 branch = "/instrumentation/" + _name;
109 _Instrument = fgGetNode(branch.c_str(), _num, true );
110 _serviceable_node = _Instrument->getNode("serviceable", true);
112 // texture name to use in 2D and 3D instruments
113 _texture_path = _Instrument->getStringValue("radar-texture-path",
114 "Aircraft/Instruments/Textures/od_wxradar.rgb");
115 _resultTexture = FGTextureManager::createTexture(_texture_path.c_str());
117 SGPath tpath(globals->get_fg_root());
118 string path = _Instrument->getStringValue("echo-texture-path",
119 "Aircraft/Instruments/Textures/wxecho.rgb");
122 // no mipmap or else alpha will mix with pixels on the border of shapes, ruining the effect
123 _wxEcho = SGLoadTexture2D(tpath.c_str(), false, false);
126 _Instrument->setFloatValue("trk", 0.0);
127 _Instrument->setFloatValue("tilt", 0.0);
128 _Instrument->setStringValue("status","");
129 // those properties are used by a radar instrument of a MFD
130 // input switch = OFF | TST | STBY | ON
131 // input mode = WX | WXA | MAP
132 // output status = STBY | TEST | WX | WXA | MAP | blank
133 // input lightning = true | false
134 // input TRK = +/- n degrees
135 // input TILT = +/- n degree
136 // input autotilt = true | false
137 // input range = n nm (20/40/80)
138 // input display-mode = arc | rose | map | plan
140 FGInstrumentMgr *imgr = (FGInstrumentMgr *) globals->get_subsystem("instrumentation");
141 _odg = (FGODGauge *) imgr->get_subsystem("od_gauge");
144 _ai = (FGAIManager*)globals->get_subsystem("ai_model");
145 _ai_enabled_node = fgGetNode("/sim/ai/enabled", true);
147 _user_lat_node = fgGetNode("/position/latitude-deg", true);
148 _user_lon_node = fgGetNode("/position/longitude-deg", true);
149 _user_alt_node = fgGetNode("/position/altitude-ft", true);
151 _user_speed_east_fps_node = fgGetNode("/velocities/speed-east-fps", true);
152 _user_speed_north_fps_node = fgGetNode("/velocities/speed-north-fps", true);
154 _tacan_serviceable_node = _Tacan->getNode("serviceable", true);
155 _tacan_distance_node = _Tacan->getNode("indicated-distance-nm", true);
156 _tacan_name_node = _Tacan->getNode("name", true);
157 _tacan_bearing_node = _Tacan->getNode("indicated-bearing-true-deg", true);
158 _tacan_in_range_node = _Tacan->getNode("in-range", true);
160 _radar_mode_control_node = _Instrument->getNode("mode-control", true);
161 _radar_coverage_node = _Instrument->getNode("limit-deg", true);
162 _radar_ref_rng_node = _Instrument->getNode("reference-range-nm", true);
163 _radar_hdg_marker_node = _Instrument->getNode("heading-marker", true);
165 SGPropertyNode *n = _Instrument->getNode("display-controls", true);
166 _radar_weather_node = n->getNode("WX", true);
167 _radar_position_node = n->getNode("pos", true);
168 _radar_data_node = n->getNode("data", true);
169 _radar_symbol_node = n->getNode("symbol", true);
170 _radar_centre_node = n->getNode("centre", true);
171 _radar_rotate_node = n->getNode("rotate", true);
172 _radar_font_node = _Instrument->getNode("font", true);
173 _radar_font_node->addChangeListener(this);
177 _radar_centre_node->setBoolValue(false);
178 if (_radar_coverage_node->getType() == SGPropertyNode::NONE)
179 _radar_coverage_node->setFloatValue(120);
180 if (_radar_ref_rng_node->getType() == SGPropertyNode::NONE)
181 _radar_ref_rng_node->setDoubleValue(35);
182 if (_radar_hdg_marker_node->getType() == SGPropertyNode::NONE)
183 _radar_hdg_marker_node->setBoolValue(true);
188 // OSG geometry setup. The polygons for the radar returns will be
189 // stored in a single Geometry. The geometry will have several
190 // primitive sets so we can have different kinds of polys and
191 // choose a different overall color for each set.
192 _radarGeode = new osg::Geode;
193 osg::StateSet* stateSet = _radarGeode->getOrCreateStateSet();
194 stateSet->setTextureAttributeAndModes(0, _wxEcho.get());
195 _geom = new osg::Geometry;
196 _geom->setUseDisplayList(false);
197 // Initially allocate space for 128 quads
198 _vertices = new osg::Vec2Array;
199 _vertices->setDataVariance(osg::Object::DYNAMIC);
200 _vertices->reserve(128 * 4);
201 _geom->setVertexArray(_vertices);
202 _texCoords = new osg::Vec2Array;
203 _texCoords->setDataVariance(osg::Object::DYNAMIC);
204 _texCoords->reserve(128 * 4);
205 _geom->setTexCoordArray(0, _texCoords);
206 osg::Vec3Array* colors = new osg::Vec3Array;
207 colors->push_back(osg::Vec3(1.0f, 1.0f, 1.0f)); // color of echos
208 colors->push_back(osg::Vec3(1.0f, 0.0f, 0.0f)); // arc mask
209 colors->push_back(osg::Vec3(0.0f, 0.0f, 0.0f)); // rest of mask
210 _geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
211 _geom->setColorArray(colors);
212 osg::PrimitiveSet* pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
213 pset->setDataVariance(osg::Object::DYNAMIC);
214 _geom->addPrimitiveSet(pset);
215 pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
216 pset->setDataVariance(osg::Object::DYNAMIC);
217 _geom->addPrimitiveSet(pset);
218 pset = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES);
219 pset->setDataVariance(osg::Object::DYNAMIC);
220 _geom->addPrimitiveSet(pset);
221 _geom->setInitialBound(osg::BoundingBox(osg::Vec3f(-256.0f, -256.0f, 0.0f),
222 osg::Vec3f(256.0f, 256.0f, 0.0f)));
223 _radarGeode->addDrawable(_geom);
225 // Texture in the 2D panel system
226 FGTextureManager::addTexture(_texture_path.c_str(), _odg->getTexture());
228 _textGeode = new osg::Geode;
230 osg::Camera* camera = _odg->getCamera();
231 camera->addChild(_radarGeode.get());
232 camera->addChild(_textGeode.get());
236 // Local coordinates for each echo
237 const osg::Vec3f echoCoords[4] = {
238 osg::Vec3f(-.7f, -.7f, 0.0f), osg::Vec3f(.7f, -.7f, 0.0f),
239 osg::Vec3f(.7f, .7f, 0.0f), osg::Vec3f(-.7f, .7f, 0.0f)
243 const osg::Vec2f echoTexCoords[4] = {
244 osg::Vec2f(0.0f, 0.0f), osg::Vec2f(UNIT, 0.0f),
245 osg::Vec2f(UNIT, UNIT), osg::Vec2f(0.0f, UNIT)
251 addQuad(osg::Vec2Array* vertices, osg::Vec2Array* texCoords,
252 const osg::Matrixf& transform, const osg::Vec2f& texBase)
254 for (int i = 0; i < 4; i++) {
255 const osg::Vec3f coords = transform.preMult(echoCoords[i]);
256 texCoords->push_back(texBase + echoTexCoords[i]);
257 vertices->push_back(osg::Vec2f(coords.x(), coords.y()));
262 // Rotate by a heading value
264 osg::Matrixf wxRotate(float angle)
266 return osg::Matrixf::rotate(angle, 0.0f, 0.0f, -1.0f);
271 wxRadarBg::update (double delta_time_sec)
273 if ( ! _sim_init_done ) {
274 if ( ! fgGetBool("sim/sceneryloaded", false) )
277 _sim_init_done = true;
279 if ( !_odg || ! _serviceable_node->getBoolValue() ) {
280 _Instrument->setStringValue("status","");
283 _time += delta_time_sec;
284 if (_time < _interval)
289 string mode = _Instrument->getStringValue("display-mode", "arc");
291 if (_display_mode != MAP) {
295 } else if (mode == "plan") {
296 _display_mode = PLAN;
301 string switchKnob = _Instrument->getStringValue("switch", "on");
302 if ( _last_switchKnob != switchKnob ) {
303 // since 3D models don't share textures with the rest of the world
304 // we must locate them and replace their handle by hand
305 // only do that when the instrument is turned on
306 //if ( _last_switchKnob == "off" )
307 //_odg->set_texture(_texture_path.c_str(), _resultTexture->getHandle());
309 _last_switchKnob = switchKnob;
312 if ( switchKnob == "off" ) {
313 _Instrument->setStringValue("status","");
314 } else if ( switchKnob == "stby" ) {
315 _Instrument->setStringValue("status","STBY");
316 } else if ( switchKnob == "tst" ) {
317 _Instrument->setStringValue("status","TST");
318 // find something interesting to do...
320 float r = _Instrument->getFloatValue("range", 40.0);
321 if (r != _range_nm) {
326 _radar_ref_rng = _radar_ref_rng_node->getDoubleValue();
327 _view_heading = get_heading() * SG_DEGREES_TO_RADIANS;
328 _centerTrans.makeTranslate(0.0f, 0.0f, 0.0f);
330 _scale = 200.0 / _range_nm;
333 if ( _display_mode == ARC ) {
334 _scale = 2*200.0f / _range_nm;
335 _angle_offset = -_view_heading;
336 _centerTrans.makeTranslate(0.0f, -200.0f, 0.0f);
338 } else if ( _display_mode == MAP ) {
341 bool centre = _radar_centre_node->getBoolValue();
344 _radar_centre_node->setBoolValue(false);
347 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: displacement "
348 // << _x_offset <<", "<<_y_offset
349 // << " user_speed_east_fps * SG_FPS_TO_KT "
350 // << user_speed_east_fps * SG_FPS_TO_KT
351 // << " user_speed_north_fps * SG_FPS_TO_KT "
352 // << user_speed_north_fps * SG_FPS_TO_KT
353 // << " dt " << delta_time_sec);
355 _centerTrans.makeTranslate(_x_offset, _y_offset, 0.0f);
357 } else if ( _display_mode == PLAN ) {
358 if (_radar_rotate_node->getBoolValue()) {
359 _angle_offset = -_view_heading;
367 _textGeode->removeDrawables(0, _textGeode->getNumDrawables());
373 osg::DrawArrays* quadPSet
374 = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(0));
375 quadPSet->set(osg::PrimitiveSet::QUADS, 0, _vertices->size());
378 // erase what is out of sight of antenna
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 float xOffset = 256.0f;
396 float yOffset = 200.0f;
398 int firstQuadVert = _vertices->size();
399 _texCoords->push_back(osg::Vec2f(0.5f, 0.25f));
400 _vertices->push_back(osg::Vec2f(-xOffset, 0.0 + yOffset));
401 _texCoords->push_back(osg::Vec2f(1.0f, 0.25f));
402 _vertices->push_back(osg::Vec2f(xOffset, 0.0 + yOffset));
403 _texCoords->push_back(osg::Vec2f(1.0f, 0.5f));
404 _vertices->push_back(osg::Vec2f(xOffset, 256.0 + yOffset));
405 _texCoords->push_back(osg::Vec2f(0.5f, 0.5f));
406 _vertices->push_back(osg::Vec2f(-xOffset, 256.0 + yOffset));
407 maskPSet->set(osg::PrimitiveSet::QUADS, firstQuadVert, 4);
409 // The triangles aren't supposed to be textured, but there's
410 // no need to set up a different Geometry, switch modes,
411 // etc. I happen to know that there's a white pixel in the
412 // texture at 1.0, 0.0 :)
413 float centerY = tan(30 * SG_DEGREES_TO_RADIANS);
414 _vertices->push_back(osg::Vec2f(0.0, 0.0));
415 _vertices->push_back(osg::Vec2f(-256.0, 0.0));
416 _vertices->push_back(osg::Vec2f(-256.0, 256.0 * centerY));
418 _vertices->push_back(osg::Vec2f(0.0, 0.0));
419 _vertices->push_back(osg::Vec2f(256.0, 0.0));
420 _vertices->push_back(osg::Vec2f(256.0, 256.0 * centerY));
422 _vertices->push_back(osg::Vec2f(-256, 0.0));
423 _vertices->push_back(osg::Vec2f(256.0, 0.0));
424 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
426 _vertices->push_back(osg::Vec2f(256, 0.0));
427 _vertices->push_back(osg::Vec2f(256.0, -256.0));
428 _vertices->push_back(osg::Vec2f(-256.0, -256.0));
430 const osg::Vec2f whiteSpot(1.0f, 0.0f);
431 for (int i = 0; i < 3 * 4; i++)
432 _texCoords->push_back(whiteSpot);
434 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, firstQuadVert + 4,
438 maskPSet->set(osg::PrimitiveSet::QUADS, 0, 0);
439 trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, 0, 0);
443 trimaskPSet->dirty();
451 update_heading_marker();
453 quadPSet->set(osg::PrimitiveSet::QUADS, 0, _vertices->size());
460 wxRadarBg::update_weather()
462 string modeButton = _Instrument->getStringValue("mode", "wx");
463 _radarEchoBuffer = *sgEnviro.get_radar_echo();
465 // pretend we have a scan angle bigger then the FOV
466 // TODO:check real fov, enlarge if < nn, and do clipping if > mm
467 const float fovFactor = 1.45f;
468 _Instrument->setStringValue("status", modeButton.c_str());
470 list_of_SGWxRadarEcho *radarEcho = &_radarEchoBuffer;
471 list_of_SGWxRadarEcho::iterator iradarEcho, end = radarEcho->end();
472 const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
474 // draw the cloud radar echo
475 bool drawClouds = _radar_weather_node->getBoolValue();
478 // we do that in 3 passes, one for each color level
479 // this is to 'merge' same colors together
480 for (int level = 0; level <= 2; level++) {
481 float col = level * UNIT;
483 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
484 int cloudId = iradarEcho->cloudId;
485 bool upgrade = (cloudId >> 5) & 1;
486 float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
489 if (iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
492 if (iradarEcho->lightning || lwc < LWClevel[level])
495 float radius = sgSqrt(iradarEcho->dist) * SG_METER_TO_NM * _scale;
496 float size = iradarEcho->radius * 2.0 * SG_METER_TO_NM * _scale;
498 if (radius - size > 180)
501 float angle = (iradarEcho->heading - _angle_offset) //* fovFactor
504 // Rotate echo into position, and rotate echo to have
505 // a constant orientation towards the
506 // airplane. Compass headings increase in clockwise
507 // direction, while graphics rotations follow
508 // right-hand (counter-clockwise) rule.
509 const osg::Vec2f texBase(col, (UNIT * (float) (4 + (cloudId & 3))));
511 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
512 * osg::Matrixf::translate(0.0f, radius, 0.0f)
513 * wxRotate(angle) * _centerTrans);
514 addQuad(_vertices, _texCoords, m, texBase);
516 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing clouds"
517 // << " ID=" << cloudId
520 // << " radius=" << radius
521 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
522 // << " heading=" << iradarEcho->heading * SG_RADIANS_TO_DEGREES
523 // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
528 // draw lightning echos
529 bool drawLightning = _Instrument->getBoolValue("lightning", true);
530 if ( drawLightning ) {
531 const osg::Vec2f texBase(3 * UNIT, 4 * UNIT);
533 for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
534 if (!iradarEcho->lightning)
537 float size = UNIT * 0.5f;
538 float radius = iradarEcho->dist * _scale;
539 float angle = iradarEcho->heading * SG_DEGREES_TO_RADIANS
542 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
544 * osg::Matrixf::translate(0.0f, radius, 0.0f)
545 * wxRotate(angle) * _centerTrans);
546 addQuad(_vertices, _texCoords, m, texBase);
552 wxRadarBg::update_data(FGAIBase* ac, double radius, double bearing, bool selected)
554 osgText::Text* callsign = new osgText::Text;
555 callsign->setFont(_font.get());
556 callsign->setFontResolution(12, 12);
557 callsign->setCharacterSize(12);
558 callsign->setColor(selected ? osg::Vec4(1, 1, 1, 1) : osg::Vec4(0, 1, 0, 1));
559 osg::Matrixf m(wxRotate(-bearing)
560 * osg::Matrixf::translate(0.0f, radius, 0.0f)
561 * wxRotate(bearing) * _centerTrans);
563 osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
564 // cast to int's, otherwise text comes out ugly
565 callsign->setPosition(osg::Vec3((int)pos.x(), (int)pos.y(), 0));
566 callsign->setAlignment(osgText::Text::LEFT_BOTTOM_BASE_LINE);
567 callsign->setLineSpacing(0.25);
570 text << ac->_getCallsign() << endl
571 << setprecision(0) << fixed
572 << setw(3) << setfill('0') << ac->_getHeading() << "\xB0 "
573 << setw(0) << ac->_getAltitude() << "ft" << endl
574 << ac->_getSpeed() << "kts";
576 callsign->setText(text.str());
577 _textGeode->addDrawable(callsign);
581 wxRadarBg::update_aircraft()
583 if (!_ai_enabled_node->getBoolValue())
586 bool draw_echoes = _radar_position_node->getBoolValue();
587 bool draw_symbols = _radar_symbol_node->getBoolValue();
588 bool draw_data = _radar_data_node->getBoolValue();
589 if (!draw_echoes && !draw_symbols && !draw_data)
592 radar_list_type radar_list = _ai->get_ai_list();
593 SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: AI submodel list size" << radar_list.size());
594 if (radar_list.empty())
597 SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: Loading AI submodels ");
598 const double echo_radii[] = {0, 1, 1.5, 1.5, 0.001, 0.1, 1.5, 2, 1.5, 1.5};
600 double user_lat = _user_lat_node->getDoubleValue();
601 double user_lon = _user_lon_node->getDoubleValue();
602 double user_alt = _user_alt_node->getDoubleValue();
604 float limit = _radar_coverage_node->getFloatValue();
609 limit *= SG_DEGREES_TO_RADIANS;
611 radar_list_iterator it = radar_list.begin();
612 radar_list_iterator end = radar_list.end();
613 FGAIBase *selected_ac = 0;
614 double selected_radius = 0;
615 double selected_bearing = 0;
616 int selected_id = fgGetInt("/instrumentation/radar/selected-id", -1);
618 for (; it != end; ++it) {
620 int type = ac->getType();
621 double lat = ac->_getLatitude();
622 double lon = ac->_getLongitude();
623 double alt = ac->_getAltitude();
624 double heading = ac->_getHeading();
626 double range, bearing;
627 calcRangeBearing(user_lat, user_lon, lat, lon, range, bearing);
629 //SG_LOG(SG_GENERAL, SG_DEBUG,
630 // "Radar: ID=" << ac->getID() << "(" << radar_list.size() << ")"
631 // << " type=" << type
632 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
634 // << " heading=" << heading
635 // << " range=" << range
636 // << " bearing=" << bearing);
638 bool isVisible = withinRadarHorizon(user_alt, alt, range);
639 SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: visible " << isVisible);
643 if (!inRadarRange(type, range))
646 bearing *= SG_DEGREES_TO_RADIANS;
647 heading *= SG_DEGREES_TO_RADIANS;
649 float radius = range * _scale;
650 float angle = calcRelBearing(bearing, _view_heading);
652 if (angle > limit || angle < -limit)
655 bearing += _angle_offset;
656 heading += _angle_offset;
660 float echo_radius = echo_radii[type] * 120;
661 float size = echo_radius * UNIT;
663 const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
664 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
665 * osg::Matrixf::translate(0.0f, radius, 0.0f)
666 * wxRotate(bearing) * _centerTrans);
667 addQuad(_vertices, _texCoords, m, texBase);
669 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing AI"
670 // << " x=" << x << " y=" << y
671 // << " radius=" << radius
672 // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
677 const osg::Vec2f texBase(0, 3 * UNIT);
678 float size = 600 * UNIT;
679 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
680 * wxRotate(heading - bearing)
681 * osg::Matrixf::translate(0.0f, radius, 0.0f)
682 * wxRotate(bearing) * _centerTrans);
683 addQuad(_vertices, _texCoords, m, texBase);
685 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing data"
686 // << " x=" << x <<" y="<< y
687 // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
688 // << " radius=" << radius);
692 if (ac->getID() == selected_id) {
694 selected_radius = radius;
695 selected_bearing = bearing;
697 update_data(ac, radius, bearing, false);
702 update_data(selected_ac, selected_radius, selected_bearing, true);
708 wxRadarBg::update_tacan()
711 int mode = _radar_mode_control_node->getIntValue();
712 bool inRange = _tacan_in_range_node->getBoolValue();
714 if (mode != 1 || !inRange)
717 float size = 600 * UNIT;
718 float radius = _tacan_distance_node->getFloatValue() * _scale;
719 float angle = _tacan_bearing_node->getFloatValue() * SG_DEGREES_TO_RADIANS
722 const osg::Vec2f texBase(1 * UNIT, 3 * UNIT);
723 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
725 * osg::Matrixf::translate(0.0f, radius, 0.0f)
726 * wxRotate(angle) * _centerTrans);
727 addQuad(_vertices, _texCoords, m, texBase);
729 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing TACAN"
730 // << " dist=" << radius
731 // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
732 // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
733 // << " x=" << x << " y="<< y
734 // << " size=" << size);
739 wxRadarBg::update_heading_marker()
741 if (!_radar_hdg_marker_node->getBoolValue())
744 const osg::Vec2f texBase(2 * UNIT, 3 * UNIT);
745 float size = 600 * UNIT;
746 osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
747 * wxRotate(_view_heading + _angle_offset));
750 addQuad(_vertices, _texCoords, m, texBase);
752 //SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: drawing heading marker"
753 // << " x,y " << x <<","<< y
754 // << " dist" << dist
755 // << " view_heading" << _view_heading * SG_RADIANS_TO_DEGREES
756 // << " heading " << iradarEcho->heading * SG_RADIANS_TO_DEGREES
757 // << " angle " << angle * SG_RADIANS_TO_DEGREES);
762 wxRadarBg::center_map()
764 _lat = _user_lat_node->getDoubleValue();
765 _lon = _user_lon_node->getDoubleValue();
766 _x_offset = _y_offset = 0;
771 wxRadarBg::apply_map_offset()
773 double lat = _user_lat_node->getDoubleValue();
774 double lon = _user_lon_node->getDoubleValue();
775 double bearing, distance, az2;
776 geo_inverse_wgs_84(_lat, _lon, lat, lon, &bearing, &az2, &distance);
777 distance *= SG_METER_TO_NM * _scale;
778 bearing *= SG_DEGREES_TO_RADIANS;
779 _x_offset += sin(bearing) * distance;
780 _y_offset += cos(bearing) * distance;
787 wxRadarBg::withinRadarHorizon(double user_alt, double alt, double range_nm)
789 // Radar Horizon = 1.23(ht^1/2 + hr^1/2),
790 //don't allow negative altitudes (an approximation - yes altitudes can be negative)
798 double radarhorizon = 1.23 * (sqrt(alt) + sqrt(user_alt));
799 SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: horizon " << radarhorizon);
800 return radarhorizon >= range_nm;
805 wxRadarBg::inRadarRange(int type, double range_nm)
807 //The Radar Equation:
809 // MaxRange^4 = (TxPower * AntGain^2 * lambda^2 * sigma)/((constant) * MDS)
811 // Where (constant) = (4*pi)3 and MDS is the Minimum Detectable Signal power.
813 // For a given radar we can assume that the only variable is sigma,
814 // the target radar cross section.
816 // Here, we will use a normalised rcs (sigma) for a standard taget and assume that this
817 // will provide a maximum range of 35nm;
819 // TODO - make the maximum range adjustable at runtime
821 const double sigma[] = {0, 1, 100, 100, 0.001, 0.1, 100, 100, 1, 1};
822 double constant = _radar_ref_rng;
827 double maxrange = constant * pow(sigma[type], 0.25);
828 SG_LOG(SG_GENERAL, SG_DEBUG, "Radar: max range " << maxrange);
829 return maxrange >= range_nm;
834 wxRadarBg::calcRangeBearing(double lat, double lon, double lat2, double lon2,
835 double &range, double &bearing ) const
837 // calculate the bearing and range of the second pos from the first
838 double az2, distance;
839 geo_inverse_wgs_84(lat, lon, lat2, lon2, &bearing, &az2, &distance);
840 range = distance *= SG_METER_TO_NM;
845 wxRadarBg::calcRelBearing(float bearing, float heading)
847 float angle = bearing - heading;
850 angle -= 2.0 * SG_PI;
853 angle += 2.0 * SG_PI;
859 wxRadarBg::updateFont()
862 string path = _radar_font_node->getStringValue();
863 if (path.length() == 0) {
866 if (path[0] != '/') {
867 tpath = globals->get_fg_root();
868 tpath.append("Fonts");
873 #if (FG_OSG_VERSION >= 21000)
874 osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
875 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str(), fontOptions.get());
877 osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str());
881 _font->setMinFilterHint(osg::Texture::NEAREST);
882 _font->setMagFilterHint(osg::Texture::NEAREST);
883 _font->setGlyphImageMargin(0);
884 _font->setGlyphImageMarginRatio(0);
889 wxRadarBg::valueChanged(SGPropertyNode*)