// Wx Radar background texture
//
// Written by Harald JOHNSEN, started May 2005.
+// With major amendments by Vivian MEAZZA May 2007
+// Ported to OSG by Tim Moore Jun 2007
//
-// Copyright (C) 2005 Harald JOHNSEN - hjohnsen@evc.net
+//
+// Copyright (C) 2005 Harald JOHNSEN
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
-// Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//
-#include <plib/sg.h>
-#include <plib/ssg.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <osg/Array>
+#include <osg/Geometry>
+#include <osg/Matrixf>
+#include <osg/PrimitiveSet>
+#include <osg/StateSet>
+#include <osg/Version>
+#include <osgDB/ReaderWriter>
+#include <osgDB/WriteFile>
+
+#include <simgear/constants.h>
+#include <simgear/misc/sg_path.hxx>
+#include <simgear/scene/model/model.hxx>
+#include <simgear/structure/exception.hxx>
+#include <simgear/misc/sg_path.hxx>
+#include <simgear/math/sg_geodesy.hxx>
+
+#include <sstream>
+#include <iomanip>
+
+using std::stringstream;
+using std::endl;
+using std::setprecision;
+using std::fixed;
+using std::setw;
+using std::setfill;
+using std::string;
+
#include <Main/fg_props.hxx>
#include <Main/globals.hxx>
#include <Cockpit/panel.hxx>
-#include <Cockpit/hud.hxx>
-#include <simgear/constants.h>
-#include <simgear/misc/sg_path.hxx>
-#include <simgear/environment/visual_enviro.hxx>
#include "instrument_mgr.hxx"
#include "od_gauge.hxx"
#include "wxradar.hxx"
-// texture name to use in 2D and 3D instruments
-static const char *odgauge_name = "Aircraft/Instruments/Textures/od_wxradar.rgb";
-
-wxRadarBg::wxRadarBg ( SGPropertyNode *node) :
- name("wxRadar"),
- num(0),
- resultTexture( 0 ),
- wxEcho( 0 ),
- last_switchKnob( "off" ),
- sim_init_done ( false ),
- odg( 0 )
-{
- int i;
- for ( i = 0; i < node->nChildren(); ++i ) {
- SGPropertyNode *child = node->getChild(i);
- string cname = child->getName();
- string cval = child->getStringValue();
- if ( cname == "name" ) {
- name = cval;
- } else if ( cname == "number" ) {
- num = child->getIntValue();
- } else {
- SG_LOG( SG_INSTR, SG_WARN, "Error in wxRadar config logic" );
- if ( name.length() ) {
- SG_LOG( SG_INSTR, SG_WARN, "Section = " << name );
- }
- }
- }
-}
+#include <iostream> // for cout, endl
+
+using std::cout;
+using std::endl;
-wxRadarBg::wxRadarBg ()
+static const float UNIT = 1.0f / 8.0f; // 8 symbols in a row/column in the texture
+static const char *DEFAULT_FONT = "typewriter.txf";
+
+wxRadarBg::wxRadarBg(SGPropertyNode *node) :
+ _name(node->getStringValue("name", "radar")),
+ _num(node->getIntValue("number", 0)),
+ _time(0.0),
+ _interval(node->getDoubleValue("update-interval-sec", 1.0)),
+ _elapsed_time(0),
+ _persistance(0),
+ _odg(0),
+ _range_nm(0),
+ _scale(0),
+ _angle_offset(0),
+ _view_heading(0),
+ _x_offset(0),
+ _y_offset(0),
+ _radar_ref_rng(0),
+ _lat(0),
+ _lon(0),
+ _antenna_ht(node->getDoubleValue("antenna-ht-ft", 0.0)),
+ _resultTexture(0),
+ _wxEcho(0),
+ _font_size(0),
+ _font_spacing(0)
{
+ string branch;
+ branch = "/instrumentation/" + _name;
+ _Instrument = fgGetNode(branch.c_str(), _num, true);
+
+ const char *tacan_source = node->getStringValue("tacan-source", "/instrumentation/tacan");
+ _Tacan = fgGetNode(tacan_source, true);
+
+ _font_node = _Instrument->getNode("font", true);
+
+#define INITFONT(p, val, type) if (!_font_node->hasValue(p)) _font_node->set##type##Value(p, val)
+ INITFONT("name", DEFAULT_FONT, String);
+ INITFONT("size", 8, Float);
+ INITFONT("line-spacing", 0.25, Float);
+ INITFONT("color/red", 0, Float);
+ INITFONT("color/green", 0.8, Float);
+ INITFONT("color/blue", 0, Float);
+ INITFONT("color/alpha", 1, Float);
+#undef INITFONT
+
+ _font_node->addChangeListener(this, true);
}
+
wxRadarBg::~wxRadarBg ()
{
- ssgDeRefDelete(resultTexture);
- ssgDeRefDelete(wxEcho);
+ _font_node->removeChangeListener(this);
+ delete _odg;
}
+
void
wxRadarBg::init ()
{
- string branch;
- branch = "/instrumentation/" + name;
-
- _Instrument = fgGetNode(branch.c_str(), num, true );
- _serviceable_node = _Instrument->getChild("serviceable", 0, true);
- resultTexture = FGTextureManager::createTexture( odgauge_name );
- resultTexture->ref();
- SGPath tpath(globals->get_fg_root());
- tpath.append("Aircraft/Instruments/Textures/wxecho.rgb");
+ _serviceable_node = _Instrument->getNode("serviceable", true);
+ _sceneryLoaded = fgGetNode("/sim/sceneryloaded", true);
+
+ // texture name to use in 2D and 3D instruments
+ _texture_path = _Instrument->getStringValue("radar-texture-path",
+ "Aircraft/Instruments/Textures/od_wxradar.rgb");
+ _resultTexture = FGTextureManager::createTexture(_texture_path.c_str(), false);
+
+ string path = _Instrument->getStringValue("echo-texture-path",
+ "Aircraft/Instruments/Textures/wxecho.rgb");
+ SGPath tpath = globals->resolve_aircraft_path(path);
+
// no mipmap or else alpha will mix with pixels on the border of shapes, ruining the effect
- wxEcho = new ssgTexture( tpath.c_str(), false, false, false);
- wxEcho->ref();
+ _wxEcho = SGLoadTexture2D(tpath, NULL, false, false);
+
_Instrument->setFloatValue("trk", 0.0);
_Instrument->setFloatValue("tilt", 0.0);
- _Instrument->setStringValue("status","");
+ _Instrument->setStringValue("status", "");
// those properties are used by a radar instrument of a MFD
// input switch = OFF | TST | STBY | ON
// input mode = WX | WXA | MAP
- // ouput status = STBY | TEST | WX | WXA | MAP | blank
+ // output status = STBY | TEST | WX | WXA | MAP | blank
// input lightning = true | false
// input TRK = +/- n degrees
// input TILT = +/- n degree
// input range = n nm (20/40/80)
// input display-mode = arc | rose | map | plan
- FGInstrumentMgr *imgr = (FGInstrumentMgr *) globals->get_subsystem("instrumentation");
- odg = (FGODGauge *) imgr->get_subsystem("od_gauge");
+ _odg = new FGODGauge;
+ _odg->setSize(512);
+
+ _ai_enabled_node = fgGetNode("/sim/ai/enabled", true);
+
+ _user_lat_node = fgGetNode("/position/latitude-deg", true);
+ _user_lon_node = fgGetNode("/position/longitude-deg", true);
+ _user_alt_node = fgGetNode("/position/altitude-ft", true);
+
+ _user_speed_east_fps_node = fgGetNode("/velocities/speed-east-fps", true);
+ _user_speed_north_fps_node = fgGetNode("/velocities/speed-north-fps", true);
+
+ _tacan_serviceable_node = _Tacan->getNode("serviceable", true);
+ _tacan_distance_node = _Tacan->getNode("indicated-distance-nm", true);
+ _tacan_name_node = _Tacan->getNode("name", true);
+ _tacan_bearing_node = _Tacan->getNode("indicated-bearing-true-deg", true);
+ _tacan_in_range_node = _Tacan->getNode("in-range", true);
+
+ _radar_mode_control_node = _Instrument->getNode("mode-control", true);
+ _radar_coverage_node = _Instrument->getNode("limit-deg", true);
+ _radar_ref_rng_node = _Instrument->getNode("reference-range-nm", true);
+ _radar_hdg_marker_node = _Instrument->getNode("heading-marker", true);
+
+ SGPropertyNode *n = _Instrument->getNode("display-controls", true);
+ _radar_weather_node = n->getNode("WX", true);
+ _radar_position_node = n->getNode("pos", true);
+ _radar_data_node = n->getNode("data", true);
+ _radar_symbol_node = n->getNode("symbol", true);
+ _radar_centre_node = n->getNode("centre", true);
+ _radar_rotate_node = n->getNode("rotate", true);
+ _radar_tcas_node = n->getNode("tcas", true);
+ _radar_absalt_node = n->getNode("abs-altitude", true);
+
+ _radar_centre_node->setBoolValue(false);
+ if (!_radar_coverage_node->hasValue())
+ _radar_coverage_node->setFloatValue(120);
+ if (!_radar_ref_rng_node->hasValue())
+ _radar_ref_rng_node->setDoubleValue(35);
+ if (!_radar_hdg_marker_node->hasValue())
+ _radar_hdg_marker_node->setBoolValue(true);
+
+ _x_offset = 0;
+ _y_offset = 0;
+
+ // OSG geometry setup. The polygons for the radar returns will be
+ // stored in a single Geometry. The geometry will have several
+ // primitive sets so we can have different kinds of polys and
+ // choose a different overall color for each set.
+ _radarGeode = new osg::Geode;
+ osg::StateSet *stateSet = _radarGeode->getOrCreateStateSet();
+ stateSet->setTextureAttributeAndModes(0, _wxEcho.get());
+ _geom = new osg::Geometry;
+ _geom->setUseDisplayList(false);
+ // Initially allocate space for 128 quads
+ _vertices = new osg::Vec2Array;
+ _vertices->setDataVariance(osg::Object::DYNAMIC);
+ _vertices->reserve(128 * 4);
+ _geom->setVertexArray(_vertices);
+ _texCoords = new osg::Vec2Array;
+ _texCoords->setDataVariance(osg::Object::DYNAMIC);
+ _texCoords->reserve(128 * 4);
+ _geom->setTexCoordArray(0, _texCoords);
+ osg::Vec3Array *colors = new osg::Vec3Array;
+ colors->push_back(osg::Vec3(1.0f, 1.0f, 1.0f)); // color of echos
+ colors->push_back(osg::Vec3(1.0f, 0.0f, 0.0f)); // arc mask
+ colors->push_back(osg::Vec3(0.0f, 0.0f, 0.0f)); // rest of mask
+ _geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
+ _geom->setColorArray(colors);
+ osg::PrimitiveSet *pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
+ pset->setDataVariance(osg::Object::DYNAMIC);
+ _geom->addPrimitiveSet(pset);
+ pset = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
+ pset->setDataVariance(osg::Object::DYNAMIC);
+ _geom->addPrimitiveSet(pset);
+ pset = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES);
+ pset->setDataVariance(osg::Object::DYNAMIC);
+ _geom->addPrimitiveSet(pset);
+ _geom->setInitialBound(osg::BoundingBox(osg::Vec3f(-256.0f, -256.0f, 0.0f),
+ osg::Vec3f(256.0f, 256.0f, 0.0f)));
+ _radarGeode->addDrawable(_geom);
+ _odg->allocRT();
+ // Texture in the 2D panel system
+ FGTextureManager::addTexture(_texture_path.c_str(), _odg->getTexture());
+
+ _textGeode = new osg::Geode;
+
+ osg::Camera *camera = _odg->getCamera();
+ camera->addChild(_radarGeode.get());
+ camera->addChild(_textGeode.get());
+
+ updateFont();
+}
+
+
+// Local coordinates for each echo
+const osg::Vec3f echoCoords[4] = {
+ osg::Vec3f(-.7f, -.7f, 0.0f), osg::Vec3f(.7f, -.7f, 0.0f),
+ osg::Vec3f(.7f, .7f, 0.0f), osg::Vec3f(-.7f, .7f, 0.0f)
+};
+
+
+const osg::Vec2f echoTexCoords[4] = {
+ osg::Vec2f(0.0f, 0.0f), osg::Vec2f(UNIT, 0.0f),
+ osg::Vec2f(UNIT, UNIT), osg::Vec2f(0.0f, UNIT)
+};
+
+
+// helper
+static void
+addQuad(osg::Vec2Array *vertices, osg::Vec2Array *texCoords,
+ const osg::Matrixf& transform, const osg::Vec2f& texBase)
+{
+ for (int i = 0; i < 4; i++) {
+ const osg::Vec3f coords = transform.preMult(echoCoords[i]);
+ texCoords->push_back(texBase + echoTexCoords[i]);
+ vertices->push_back(osg::Vec2f(coords.x(), coords.y()));
+ }
}
+
+// Rotate by a heading value
+static inline
+osg::Matrixf wxRotate(float angle)
+{
+ return osg::Matrixf::rotate(angle, 0.0f, 0.0f, -1.0f);
+}
+
+
void
wxRadarBg::update (double delta_time_sec)
{
- if( ! sim_init_done ) {
- if( ! fgGetBool("sim/sceneryloaded", false) )
- return;
- sim_init_done = true;
+ if (!_sceneryLoaded->getBoolValue())
+ return;
+
+ if (!_odg || !_serviceable_node->getBoolValue()) {
+ _Instrument->setStringValue("status", "");
+ return;
}
- if ( !odg || ! _serviceable_node->getBoolValue() ) {
- _Instrument->setStringValue("status","");
+
+ _time += delta_time_sec;
+ if (_time < _interval)
return;
+
+ _time = 0.0;
+
+ string mode = _Instrument->getStringValue("display-mode", "arc");
+ if (mode == "map") {
+ if (_display_mode != MAP) {
+ _display_mode = MAP;
+ center_map();
+ }
+ } else if (mode == "plan") {
+ _display_mode = PLAN;}
+ else if (mode == "bscan") {
+ _display_mode = BSCAN;
+ } else {
+ _display_mode = ARC;
}
+
string switchKnob = _Instrument->getStringValue("switch", "on");
- string modeButton = _Instrument->getStringValue("mode", "wx");
- bool drawLightning = _Instrument->getBoolValue("lightning", true);
- float range_nm = _Instrument->getFloatValue("range", 40.0);
- float range_m = range_nm * SG_NM_TO_METER;
-
- if( last_switchKnob != switchKnob ) {
- // since 3D models don't share textures with the rest of the world
- // we must locate them and replace their handle by hand
- // only do that when the instrument is turned on
- if( last_switchKnob == "off" )
- odg->set_texture( odgauge_name, resultTexture->getHandle());
- last_switchKnob = switchKnob;
- }
- odg->beginCapture(256);
- odg->Clear();
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glPushMatrix();
- glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
- glBindTexture(GL_TEXTURE_2D, 0);
- if( switchKnob == "off" ) {
- _Instrument->setStringValue("status","");
- } else if( switchKnob == "stby" ) {
- _Instrument->setStringValue("status","STBY");
- } else if( switchKnob == "tst" ) {
- _Instrument->setStringValue("status","TST");
- // find something interesting to do...
- } else {
- string display_mode = _Instrument->getStringValue("display-mode", "arc");
- // pretend we have a scan angle bigger then the FOV
- // TODO:check real fov, enlarge if < nn, and do clipping if > mm
- const float fovFactor = 1.45f;
- float view_heading = get_heading() * SG_DEGREES_TO_RADIANS;
- float range = 200.0f / range_nm;
- _Instrument->setStringValue("status", modeButton.c_str());
- if( display_mode == "arc" ) {
- glTranslatef(0.0f, -180.0f, 0.0f);
- range = 2*180.0f / range_nm;
- } else if( display_mode == "map" ) {
-// float view_heading = get_track() * SG_DEGREES_TO_RADIANS;
- } else if( display_mode == "plan" ) {
- // no sense I presume
- float view_heading = 0.0;
- } else {
- // rose
- }
- range /= SG_NM_TO_METER;
- // we will rotate the echo quads, this gives a better rendering
- const float rot_x = cos ( view_heading );
- const float rot_y = sin ( view_heading );
-
- list_of_SGWxRadarEcho *radarEcho = sgEnviro.get_radar_echo();
- list_of_SGWxRadarEcho::iterator iradarEcho;
- const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
- const float symbolSize = 1.0f / 8.0f ;
- // draw the radar echo, we do that in 3 passes, one for each color level
- // this is to 'merge' same colors together
- glBindTexture(GL_TEXTURE_2D, wxEcho->getHandle() );
- glColor3f(1.0f, 1.0f, 1.0f);
- glBegin( GL_QUADS );
-
- for(int level = 0; level <= 2 ; level++ ) {
- float col = level * symbolSize;
- for(iradarEcho = radarEcho->begin() ; iradarEcho != radarEcho->end() ; iradarEcho++ ) {
- int cloudId = (iradarEcho->cloudId) ;
- bool upgrade = ((cloudId >> 5) & 1);
- float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
- // skip ns
- if( iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
- continue;
- if( (! iradarEcho->lightning) && ( lwc >= LWClevel[level]) ) {
- float dist = sgSqrt( iradarEcho->dist );
- float size = iradarEcho->radius * 2.0;
- if( dist - size > range_m )
- continue;
- dist = dist * range;
- size = size * range;
- // compute the relative angle from the view direction
- float angle = ( view_heading + iradarEcho->heading );
- if( angle > SG_PI )
- angle -= 2.0*SG_PI;
- if( angle < - SG_PI )
- angle += 2.0*SG_PI;
- // and apply a fov factor to simulate a greater scan angle
- angle = angle * fovFactor + SG_PI / 2.0;
- float x = cos( angle ) * dist;
- float y = sin( angle ) * dist;
- // use different shapes so the display is less boring
- float row = symbolSize * (float) (4 + (cloudId & 3) );
- float size_x = rot_x * size;
- float size_y = rot_y * size;
- glTexCoord2f( col, row);
- glVertex2f( x - size_x, y - size_y);
- glTexCoord2f( col+symbolSize, row);
- glVertex2f( x + size_y, y - size_x);
- glTexCoord2f( col+symbolSize, row+symbolSize);
- glVertex2f( x + size_x, y + size_y);
- glTexCoord2f( col, row+symbolSize);
- glVertex2f( x - size_y, y + size_x);
- }
- }
+ if (switchKnob == "off") {
+ _Instrument->setStringValue("status", "");
+ } else if (switchKnob == "stby") {
+ _Instrument->setStringValue("status", "STBY");
+ } else if (switchKnob == "tst") {
+ _Instrument->setStringValue("status", "TST");
+ // find something interesting to do...
+ } else {
+ float r = _Instrument->getFloatValue("range", 40.0);
+ if (r != _range_nm) {
+ center_map();
+ _range_nm = r;
+ }
+
+ _radar_ref_rng = _radar_ref_rng_node->getDoubleValue();
+ _view_heading = fgGetDouble("/orientation/heading-deg") * SG_DEGREES_TO_RADIANS;
+ _centerTrans.makeTranslate(0.0f, 0.0f, 0.0f);
+
+ _scale = 200.0 / _range_nm;
+ _angle_offset = 0;
+
+ if (_display_mode == ARC) {
+ _scale = 2*200.0f / _range_nm;
+ _angle_offset = -_view_heading;
+ _centerTrans.makeTranslate(0.0f, -200.0f, 0.0f);
+
+ } else if (_display_mode == MAP) {
+ apply_map_offset();
+
+ bool centre = _radar_centre_node->getBoolValue();
+ if (centre) {
+ center_map();
+ _radar_centre_node->setBoolValue(false);
}
- glEnd(); // GL_QUADS
-
- // draw lightning echos
- if( drawLightning ) {
- float col = 3 * symbolSize;
- float row = 4 * symbolSize;
- for(iradarEcho = radarEcho->begin() ; iradarEcho != radarEcho->end() ; iradarEcho++ ) {
- if( iradarEcho->lightning ) {
- float dist = iradarEcho->dist;
- dist = dist * range;
- float angle = (view_heading - iradarEcho->heading);
- if( angle > SG_PI )
- angle -= 2.0*SG_PI;
- if( angle < - SG_PI )
- angle += 2.0*SG_PI;
- angle = angle * fovFactor - SG_PI / 2.0;
- float x = cos( angle ) * dist;
- float y = sin( angle ) * dist;
- glColor3f(1.0f, 1.0f, 1.0f);
- float size = symbolSize * 0.5f;
- glBegin( GL_QUADS );
- glTexCoord2f( col, row);
- glVertex2f( x - size, y - size);
- glTexCoord2f( col+symbolSize, row);
- glVertex2f( x + size, y - size);
- glTexCoord2f( col+symbolSize, row+symbolSize);
- glVertex2f( x + size, y + size);
- glTexCoord2f( col, row+symbolSize);
- glVertex2f( x - size, y + size);
- glEnd();
- }
- }
+
+ //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: displacement "
+ // << _x_offset <<", "<<_y_offset
+ // << " user_speed_east_fps * SG_FPS_TO_KT "
+ // << user_speed_east_fps * SG_FPS_TO_KT
+ // << " user_speed_north_fps * SG_FPS_TO_KT "
+ // << user_speed_north_fps * SG_FPS_TO_KT
+ // << " dt " << delta_time_sec);
+
+ _centerTrans.makeTranslate(_x_offset, _y_offset, 0.0f);
+
+ } else if (_display_mode == PLAN) {
+ if (_radar_rotate_node->getBoolValue()) {
+ _angle_offset = -_view_heading;
}
- // erase what is out of sight of antenna
- /*
+ } else if (_display_mode == BSCAN) {
+ _angle_offset = -_view_heading;
+ } else {
+ // rose
+ }
+
+ _vertices->clear();
+ _texCoords->clear();
+ _textGeode->removeDrawables(0, _textGeode->getNumDrawables());
+
+#if 0
+ //TODO FIXME Mask below (only used for ARC mode) isn't properly aligned, i.e.
+ // it assumes the a/c position at the center of the display - though it's somewhere at
+ // bottom part for ARC mode.
+ // The mask hadn't worked at all for a while (probably since the OSG port) due to
+ // another bug (which is fixed now). Now, the mask is disabled completely until s.o.
+ // adapted the coordinates below. And the mask is only really useful to limit displayed
+ // weather blobs (not support yet).
+ // Aircraft echos are already limited properly through wxradar's "limit-deg" property.
+ {
+ osg::DrawArrays *maskPSet
+ = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(1));
+ osg::DrawArrays *trimaskPSet
+ = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(2));
+
+ if (_display_mode == ARC) {
+ // erase what is out of sight of antenna
+ /*
|\ /|
| \ / |
| \ / |
| |
| |
---------
- */
- float yOffset = 180.0f, xOffset = 256.0f;
- if( display_mode != "arc" ) {
- yOffset = 40.0f;
- xOffset = 240.0f;
+ */
+ float xOffset = 256.0f;
+ float yOffset = 200.0f;
+
+ int firstQuadVert = _vertices->size();
+ _texCoords->push_back(osg::Vec2f(0.5f, 0.25f));
+ _vertices->push_back(osg::Vec2f(-xOffset, 0.0 + yOffset));
+ _texCoords->push_back(osg::Vec2f(1.0f, 0.25f));
+ _vertices->push_back(osg::Vec2f(xOffset, 0.0 + yOffset));
+ _texCoords->push_back(osg::Vec2f(1.0f, 0.5f));
+ _vertices->push_back(osg::Vec2f(xOffset, 256.0 + yOffset));
+ _texCoords->push_back(osg::Vec2f(0.5f, 0.5f));
+ _vertices->push_back(osg::Vec2f(-xOffset, 256.0 + yOffset));
+ maskPSet->set(osg::PrimitiveSet::QUADS, firstQuadVert, 4);
+ firstQuadVert += 4;
+
+ // The triangles aren't supposed to be textured, but there's
+ // no need to set up a different Geometry, switch modes,
+ // etc. I happen to know that there's a white pixel in the
+ // texture at 1.0, 0.0 :)
+ float centerY = tan(30 * SG_DEGREES_TO_RADIANS);
+ _vertices->push_back(osg::Vec2f(0.0, 0.0));
+ _vertices->push_back(osg::Vec2f(-256.0, 0.0));
+ _vertices->push_back(osg::Vec2f(-256.0, 256.0 * centerY));
+
+ _vertices->push_back(osg::Vec2f(0.0, 0.0));
+ _vertices->push_back(osg::Vec2f(256.0, 0.0));
+ _vertices->push_back(osg::Vec2f(256.0, 256.0 * centerY));
+
+ _vertices->push_back(osg::Vec2f(-256, 0.0));
+ _vertices->push_back(osg::Vec2f(256.0, 0.0));
+ _vertices->push_back(osg::Vec2f(-256.0, -256.0));
+
+ _vertices->push_back(osg::Vec2f(256, 0.0));
+ _vertices->push_back(osg::Vec2f(256.0, -256.0));
+ _vertices->push_back(osg::Vec2f(-256.0, -256.0));
+
+ const osg::Vec2f whiteSpot(1.0f, 0.0f);
+ for (int i = 0; i < 3 * 4; i++)
+ _texCoords->push_back(whiteSpot);
+
+ trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, firstQuadVert, 3 * 4);
+
+ } else
+ {
+ maskPSet->set(osg::PrimitiveSet::QUADS, 0, 0);
+ trimaskPSet->set(osg::PrimitiveSet::TRIANGLES, 0, 0);
+ }
+
+ maskPSet->dirty();
+ trimaskPSet->dirty();
+ }
+#endif
+
+ // remember index of next vertex
+ int vIndex = _vertices->size();
+
+ update_weather();
+
+ osg::DrawArrays *quadPSet
+ = static_cast<osg::DrawArrays*>(_geom->getPrimitiveSet(0));
+
+ update_aircraft();
+ update_tacan();
+ update_heading_marker();
+
+ // draw all new vertices are quads
+ quadPSet->set(osg::PrimitiveSet::QUADS, vIndex, _vertices->size()-vIndex);
+ quadPSet->dirty();
+ }
+}
+
+
+void
+wxRadarBg::update_weather()
+{
+ string modeButton = _Instrument->getStringValue("mode", "WX");
+// FIXME: implementation of radar echoes missing
+// _radarEchoBuffer = *sgEnviro.get_radar_echo();
+
+ // pretend we have a scan angle bigger then the FOV
+ // TODO:check real fov, enlarge if < nn, and do clipping if > mm
+// const float fovFactor = 1.45f;
+ _Instrument->setStringValue("status", modeButton.c_str());
+
+// FIXME: implementation of radar echoes missing
+#if 0
+ list_of_SGWxRadarEcho *radarEcho = &_radarEchoBuffer;
+ list_of_SGWxRadarEcho::iterator iradarEcho, end = radarEcho->end();
+ const float LWClevel[] = { 0.1f, 0.5f, 2.1f };
+
+ // draw the cloud radar echo
+ bool drawClouds = _radar_weather_node->getBoolValue();
+ if (drawClouds) {
+
+ // we do that in 3 passes, one for each color level
+ // this is to 'merge' same colors together
+ for (int level = 0; level <= 2; level++) {
+ float col = level * UNIT;
+
+ for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
+ int cloudId = iradarEcho->cloudId;
+ bool upgrade = (cloudId >> 5) & 1;
+ float lwc = iradarEcho->LWC + (upgrade ? 1.0f : 0.0f);
+
+ // skip ns
+ if (iradarEcho->LWC >= 0.5 && iradarEcho->LWC <= 0.6)
+ continue;
+
+ if (iradarEcho->lightning || lwc < LWClevel[level])
+ continue;
+
+ float radius = sqrt(iradarEcho->dist) * SG_METER_TO_NM * _scale;
+ float size = iradarEcho->radius * 2.0 * SG_METER_TO_NM * _scale;
+
+ if (radius - size > 180)
+ continue;
+
+ float angle = (iradarEcho->heading - _angle_offset) //* fovFactor
+ + 0.5 * SG_PI;
+
+ // Rotate echo into position, and rotate echo to have
+ // a constant orientation towards the
+ // airplane. Compass headings increase in clockwise
+ // direction, while graphics rotations follow
+ // right-hand (counter-clockwise) rule.
+ const osg::Vec2f texBase(col, (UNIT * (float) (4 + (cloudId & 3))));
+
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(angle) * _centerTrans);
+ addQuad(_vertices, _texCoords, m, texBase);
+
+ //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing clouds"
+ // << " ID=" << cloudId
+ // << " x=" << x
+ // << " y="<< y
+ // << " radius=" << radius
+ // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
+ // << " heading=" << iradarEcho->heading * SG_RADIANS_TO_DEGREES
+ // << " angle=" << angle * SG_RADIANS_TO_DEGREES);
}
- glDisable(GL_BLEND);
- glColor4f(1.0f, 0.0f, 0.0f, 0.01f);
- glBegin( GL_QUADS );
- glTexCoord2f( 0.5f, 0.25f);
- glVertex2f(-xOffset, 0.0 + yOffset);
- glTexCoord2f( 1.0f, 0.25f);
- glVertex2f(xOffset, 0.0 + yOffset);
- glTexCoord2f( 1.0f, 0.5f);
- glVertex2f(xOffset, 256.0 + yOffset);
- glTexCoord2f( 0.5f, 0.5f);
- glVertex2f(-xOffset, 256.0 + yOffset);
- glEnd();
-
- glColor4f(0.0f, 0.0f, 0.0f, 0.0f);
-// glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
- glDisable(GL_ALPHA_TEST);
- glBindTexture(GL_TEXTURE_2D, 0);
-
- glBegin( GL_TRIANGLES );
- glVertex2f(0.0, 0.0);
- glVertex2f(-256.0, 0.0);
- glVertex2f(-256.0, 256.0);
-
- glVertex2f(0.0, 0.0);
- glVertex2f(256.0, 0.0);
- glVertex2f(256.0, 256.0);
-
- glVertex2f(-256, 0.0);
- glVertex2f(256.0, 0.0);
- glVertex2f(-256.0, -256.0);
-
- glVertex2f(256, 0.0);
- glVertex2f(256.0, -256.0);
- glVertex2f(-256.0, -256.0);
- glEnd();
-
- // DEBUG only
-/* glColor4f(1.0f, 0.0f, 0.0f, 1.0f);
- glBegin( GL_LINES );
- glVertex2f(0.0, 0.0);
- glVertex2f(-256.0, 256.0);
- glVertex2f(0.0, 0.0);
- glVertex2f(256.0, 256.0);
- glEnd();*/
-
- glEnable(GL_BLEND);
- glEnable(GL_ALPHA_TEST);
}
- glPopMatrix();
- odg->endCapture( resultTexture->getHandle() );
+ }
+
+ // draw lightning echos
+ bool drawLightning = _Instrument->getBoolValue("lightning", true);
+ if (drawLightning) {
+ const osg::Vec2f texBase(3 * UNIT, 4 * UNIT);
+
+ for (iradarEcho = radarEcho->begin(); iradarEcho != end; ++iradarEcho) {
+ if (!iradarEcho->lightning)
+ continue;
+
+ float size = UNIT * 0.5f;
+ float radius = iradarEcho->dist * _scale;
+ float angle = iradarEcho->heading * SG_DEGREES_TO_RADIANS
+ - _angle_offset;
+
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * wxRotate(-angle)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(angle) * _centerTrans);
+ addQuad(_vertices, _texCoords, m, texBase);
+ }
+ }
+#endif
}
+
+
+void
+wxRadarBg::update_data(const SGPropertyNode *ac, double altitude, double heading,
+ double radius, double bearing, bool selected)
+{
+ osgText::Text *callsign = new osgText::Text;
+ callsign->setFont(_font.get());
+ callsign->setFontResolution(12, 12);
+ callsign->setCharacterSize(_font_size);
+ callsign->setColor(selected ? osg::Vec4(1, 1, 1, 1) : _font_color);
+ osg::Matrixf m(wxRotate(-bearing)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(bearing) * _centerTrans);
+
+ osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
+ // cast to int's, otherwise text comes out ugly
+ callsign->setPosition(osg::Vec3((int)pos.x(), (int)pos.y(), 0));
+ callsign->setAlignment(osgText::Text::LEFT_BOTTOM_BASE_LINE);
+ callsign->setLineSpacing(_font_spacing);
+
+ const char *identity = ac->getStringValue("transponder-id");
+ if (!identity[0])
+ identity = ac->getStringValue("callsign");
+
+ stringstream text;
+ text << identity << endl
+ << setprecision(0) << fixed
+ << setw(3) << setfill('0') << heading * SG_RADIANS_TO_DEGREES << "\xB0 "
+ << setw(0) << altitude << "ft" << endl
+ << ac->getDoubleValue("velocities/true-airspeed-kt") << "kts";
+
+ callsign->setText(text.str());
+ _textGeode->addDrawable(callsign);
+}
+
+
+void
+wxRadarBg::update_aircraft()
+{
+ double diff;
+ double age_factor = 1.0;
+ double test_rng;
+ double test_brg;
+ double range;
+ double bearing;
+ float echo_radius;
+ double angle;
+
+ if (!ground_echoes.empty()){
+ ground_echoes_iterator = ground_echoes.begin();
+
+ while(ground_echoes_iterator != ground_echoes.end()) {
+ diff = _elapsed_time - (*ground_echoes_iterator)->elapsed_time;
+
+ if( diff > _persistance) {
+ ground_echoes.erase(ground_echoes_iterator++);
+ } else {
+// double test_brg = (*ground_echoes_iterator)->bearing;
+// double bearing = test_brg * SG_DEGREES_TO_RADIANS;
+// float angle = calcRelBearing(bearing, _view_heading);
+ double bumpinessFactor = (*ground_echoes_iterator)->bumpiness;
+ float heading = fgGetDouble("/orientation/heading-deg");
+ if ( _display_mode == BSCAN ){
+ test_rng = (*ground_echoes_iterator)->elevation * 6;
+ test_brg = (*ground_echoes_iterator)->bearing;
+ angle = calcRelBearingDeg(test_brg, heading) * 6;
+ range = sqrt(test_rng * test_rng + angle * angle);
+ bearing = atan2(angle, test_rng);
+ //cout << "angle " << angle <<" bearing "
+ // << bearing / SG_DEGREES_TO_RADIANS << endl;
+ echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 240 * age_factor;
+ } else {
+ test_rng = (*ground_echoes_iterator)->range;
+ range = test_rng * SG_METER_TO_NM;
+ test_brg = (*ground_echoes_iterator)->bearing;
+ bearing = test_brg * SG_DEGREES_TO_RADIANS;
+ echo_radius = (0.1 + (1.9 * bumpinessFactor)) * 120 * age_factor;
+ bearing += _angle_offset;
+ }
+
+ float radius = range * _scale;
+ //double heading = 90 * SG_DEGREES_TO_RADIANS;
+ //heading += _angle_offset;
+
+ age_factor = 1;
+
+ if (diff != 0)
+ age_factor = 1 - (0.5 * diff/_persistance);
+
+ float size = echo_radius * UNIT;
+
+ const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(bearing) * _centerTrans);
+ addQuad(_vertices, _texCoords, m, texBase);
+
+ ++ground_echoes_iterator;
+
+ //cout << "test bearing " << test_brg
+ //<< " test_rng " << test_rng * SG_METER_TO_NM
+ //<< " persistance " << _persistance
+ //<< endl;
+ }
+
+ }
+
+ }
+ if (!_ai_enabled_node->getBoolValue())
+ return;
+
+ bool draw_tcas = _radar_tcas_node->getBoolValue();
+ bool draw_absolute = _radar_absalt_node->getBoolValue();
+ bool draw_echoes = _radar_position_node->getBoolValue();
+ bool draw_symbols = _radar_symbol_node->getBoolValue();
+ bool draw_data = _radar_data_node->getBoolValue();
+ if (!draw_echoes && !draw_symbols && !draw_data)
+ return;
+
+ double user_lat = _user_lat_node->getDoubleValue();
+ double user_lon = _user_lon_node->getDoubleValue();
+ double user_alt = _user_alt_node->getDoubleValue();
+
+ float limit = _radar_coverage_node->getFloatValue();
+ if (limit > 180)
+ limit = 180;
+ else if (limit < 0)
+ limit = 0;
+ limit *= SG_DEGREES_TO_RADIANS;
+
+ int selected_id = fgGetInt("/instrumentation/radar/selected-id", -1);
+
+ const SGPropertyNode *selected_ac = 0;
+ const SGPropertyNode *ai = fgGetNode("/ai/models", true);
+
+ for (int i = ai->nChildren() - 1; i >= -1; i--) {
+ const SGPropertyNode *model;
+
+ if (i < 0) { // last iteration: selected model
+ model = selected_ac;
+ } else {
+ model = ai->getChild(i);
+ if (!model->nChildren())
+ continue;
+ if ((model->getIntValue("id") == selected_id)&&
+ (!draw_tcas)) {
+ selected_ac = model; // save selected model for last iteration
+ continue;
+ }
+ }
+ if (!model)
+ continue;
+
+ double echo_radius, sigma;
+ const string name = model->getName();
+
+ //cout << "name "<<name << endl;
+ if (name == "aircraft" || name == "tanker")
+ echo_radius = 1, sigma = 1;
+ else if (name == "multiplayer" || name == "wingman" || name == "static")
+ echo_radius = 1.5, sigma = 1;
+ else if (name == "ship" || name == "carrier" || name == "escort" ||name == "storm")
+ echo_radius = 1.5, sigma = 100;
+ else if (name == "thermal")
+ echo_radius = 2, sigma = 100;
+ else if (name == "rocket")
+ echo_radius = 0.1, sigma = 0.1;
+ else if (name == "ballistic")
+ echo_radius = 0.001, sigma = 0.001;
+ else
+ continue;
+
+ double lat = model->getDoubleValue("position/latitude-deg");
+ double lon = model->getDoubleValue("position/longitude-deg");
+ double alt = model->getDoubleValue("position/altitude-ft");
+ double heading = model->getDoubleValue("orientation/true-heading-deg");
+
+ double range, bearing;
+ calcRangeBearing(user_lat, user_lon, lat, lon, range, bearing);
+ //cout << _antenna_ht << _interval<< endl;
+ bool isVisible = withinRadarHorizon(user_alt, alt, range);
+
+ if (!isVisible)
+ continue;
+
+ if (!inRadarRange(sigma, range))
+ continue;
+
+ bearing *= SG_DEGREES_TO_RADIANS;
+ heading *= SG_DEGREES_TO_RADIANS;
+
+ float radius = range * _scale;
+ float angle = calcRelBearing(bearing, _view_heading);
+
+ if (angle > limit || angle < -limit)
+ continue;
+
+ bearing += _angle_offset;
+ heading += _angle_offset;
+
+ bool is_tcas_contact = false;
+ if (draw_tcas)
+ {
+ is_tcas_contact = update_tcas(model,range,user_alt,alt,bearing,radius,draw_absolute);
+ }
+
+ // pos mode
+ if (draw_echoes && (!is_tcas_contact)) {
+ float size = echo_radius * 120 * UNIT;
+
+ const osg::Vec2f texBase(3 * UNIT, 3 * UNIT);
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(bearing) * _centerTrans);
+ addQuad(_vertices, _texCoords, m, texBase);
+ }
+
+ // data mode
+ if (draw_symbols && (!draw_tcas)) {
+ const osg::Vec2f texBase(0, 3 * UNIT);
+ float size = 600 * UNIT;
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * wxRotate(heading - bearing)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(bearing) * _centerTrans);
+ addQuad(_vertices, _texCoords, m, texBase);
+ }
+
+ if ((draw_data || i < 0)&& // selected one (i == -1) is always drawn
+ ((!draw_tcas)||(is_tcas_contact)||(draw_echoes)))
+ update_data(model, alt, heading, radius, bearing, i < 0);
+ }
+}
+
+/** Update TCAS display.
+ * Return true when processed as TCAS contact, false otherwise. */
+bool
+wxRadarBg::update_tcas(const SGPropertyNode *model,double range,double user_alt,double alt,
+ double bearing,double radius,bool absMode)
+{
+ int threatLevel=0;
+ {
+ // update TCAS symbol
+ osg::Vec2f texBase;
+ threatLevel = model->getIntValue("tcas/threat-level",-1);
+ if (threatLevel == -1)
+ {
+ // no TCAS information (i.e. no transponder) => not visible to TCAS
+ return false;
+ }
+ int row = 7 - threatLevel;
+ int col = 4;
+ double vspeed = model->getDoubleValue("velocities/vertical-speed-fps");
+ if (vspeed < -3.0) // descending
+ col+=1;
+ else
+ if (vspeed > 3.0) // climbing
+ col+=2;
+ texBase = osg::Vec2f(col*UNIT,row * UNIT);
+ float size = 200 * UNIT;
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * wxRotate(-bearing)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(bearing) * _centerTrans);
+ addQuad(_vertices, _texCoords, m, texBase);
+ }
+
+ {
+ // update TCAS data
+ osgText::Text *altStr = new osgText::Text;
+ altStr->setFont(_font.get());
+ altStr->setFontResolution(12, 12);
+ altStr->setCharacterSize(_font_size);
+ altStr->setColor(_tcas_colors[threatLevel]);
+ osg::Matrixf m(wxRotate(-bearing)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(bearing) * _centerTrans);
+
+ osg::Vec3 pos = m.preMult(osg::Vec3(16, 16, 0));
+ // cast to int's, otherwise text comes out ugly
+ altStr->setLineSpacing(_font_spacing);
+
+ stringstream text;
+ altStr->setAlignment(osgText::Text::LEFT_CENTER);
+ int altDif = (alt-user_alt+50)/100;
+ char sign = 0;
+ int dy=0;
+ if (altDif>=0)
+ {
+ sign='+';
+ dy=2;
+ }
+ else
+ if (altDif<0)
+ {
+ sign='-';
+ altDif = -altDif;
+ dy=-30;
+ }
+ altStr->setPosition(osg::Vec3((int)pos.x()-30, (int)pos.y()+dy, 0));
+ if (absMode)
+ {
+ // absolute altitude display
+ text << setprecision(0) << fixed
+ << setw(3) << setfill('0') << alt/100 << endl;
+ }
+ else // relative altitude display
+ if (sign)
+ {
+ text << sign
+ << setprecision(0) << fixed
+ << setw(2) << setfill('0') << altDif << endl;
+ }
+
+ altStr->setText(text.str());
+ _textGeode->addDrawable(altStr);
+ }
+
+ return true;
+}
+
+void
+wxRadarBg::update_tacan()
+{
+ // draw TACAN symbol
+ int mode = _radar_mode_control_node->getIntValue();
+ bool inRange = _tacan_in_range_node->getBoolValue();
+
+ if (mode != 1 || !inRange)
+ return;
+
+ float size = 600 * UNIT;
+ float radius = _tacan_distance_node->getFloatValue() * _scale;
+ float angle = _tacan_bearing_node->getFloatValue() * SG_DEGREES_TO_RADIANS
+ + _angle_offset;
+
+ const osg::Vec2f texBase(1 * UNIT, 3 * UNIT);
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * wxRotate(-angle)
+ * osg::Matrixf::translate(0.0f, radius, 0.0f)
+ * wxRotate(angle) * _centerTrans);
+ addQuad(_vertices, _texCoords, m, texBase);
+
+ //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing TACAN"
+ // << " dist=" << radius
+ // << " view_heading=" << _view_heading * SG_RADIANS_TO_DEGREES
+ // << " bearing=" << angle * SG_RADIANS_TO_DEGREES
+ // << " x=" << x << " y="<< y
+ // << " size=" << size);
+}
+
+
+void
+wxRadarBg::update_heading_marker()
+{
+ if (!_radar_hdg_marker_node->getBoolValue())
+ return;
+
+ const osg::Vec2f texBase(2 * UNIT, 3 * UNIT);
+ float size = 600 * UNIT;
+ osg::Matrixf m(osg::Matrixf::scale(size, size, 1.0f)
+ * wxRotate(_view_heading + _angle_offset));
+
+ m *= _centerTrans;
+ addQuad(_vertices, _texCoords, m, texBase);
+
+ //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: drawing heading marker"
+ // << " x,y " << x <<","<< y
+ // << " dist" << dist
+ // << " view_heading" << _view_heading * SG_RADIANS_TO_DEGREES
+ // << " heading " << iradarEcho->heading * SG_RADIANS_TO_DEGREES
+ // << " angle " << angle * SG_RADIANS_TO_DEGREES);
+}
+
+
+void
+wxRadarBg::center_map()
+{
+ _lat = _user_lat_node->getDoubleValue();
+ _lon = _user_lon_node->getDoubleValue();
+ _x_offset = _y_offset = 0;
+}
+
+
+void
+wxRadarBg::apply_map_offset()
+{
+ double lat = _user_lat_node->getDoubleValue();
+ double lon = _user_lon_node->getDoubleValue();
+ double bearing, distance, az2;
+ geo_inverse_wgs_84(_lat, _lon, lat, lon, &bearing, &az2, &distance);
+ distance *= SG_METER_TO_NM * _scale;
+ bearing *= SG_DEGREES_TO_RADIANS;
+ _x_offset += sin(bearing) * distance;
+ _y_offset += cos(bearing) * distance;
+ _lat = lat;
+ _lon = lon;
+}
+
+
+bool
+wxRadarBg::withinRadarHorizon(double user_alt, double alt, double range_nm)
+{
+ // Radar Horizon = 1.23(ht^1/2 + hr^1/2),
+ //don't allow negative altitudes (an approximation - yes altitudes can be negative)
+ // Allow antenna ht to be set, but only on ground
+ _antenna_ht = _Instrument->getDoubleValue("antenna-ht-ft");
+
+ if (user_alt <= 0)
+ user_alt = _antenna_ht;
+
+ if (alt <= 0)
+ alt = 0; // to allow some vertical extent of target
+
+ double radarhorizon = 1.23 * (sqrt(alt) + sqrt(user_alt));
+// SG_LOG(SG_INSTR, SG_ALERT, "Radar: radar horizon " << radarhorizon);
+ return radarhorizon >= range_nm;
+}
+
+
+bool
+wxRadarBg::inRadarRange(double sigma, double range_nm)
+{
+ //The Radar Equation:
+ //
+ // MaxRange^4 = (TxPower * AntGain^2 * lambda^2 * sigma)/((constant) * MDS)
+ //
+ // Where (constant) = (4*pi)3 and MDS is the Minimum Detectable Signal power.
+ //
+ // For a given radar we can assume that the only variable is sigma,
+ // the target radar cross section.
+ //
+ // Here, we will use a normalised rcs (sigma) for a standard taget and assume that this
+ // will provide a maximum range of 35nm;
+ //
+ // TODO - make the maximum range adjustable at runtime
+
+ double constant = _radar_ref_rng;
+
+ if (constant <= 0)
+ constant = 35;
+
+ double maxrange = constant * pow(sigma, 0.25);
+ //SG_LOG(SG_INSTR, SG_DEBUG, "Radar: max range " << maxrange);
+ return maxrange >= range_nm;
+}
+
+
+void
+wxRadarBg::calcRangeBearing(double lat, double lon, double lat2, double lon2,
+ double &range, double &bearing) const
+{
+ // calculate the bearing and range of the second pos from the first
+ double az2, distance;
+ geo_inverse_wgs_84(lat, lon, lat2, lon2, &bearing, &az2, &distance);
+ range = distance *= SG_METER_TO_NM;
+}
+
+
+float
+wxRadarBg::calcRelBearing(float bearing, float heading)
+{
+ float angle = bearing - heading;
+
+ if (angle >= SG_PI)
+ angle -= 2.0 * SG_PI;
+
+ if (angle < -SG_PI)
+ angle += 2.0 * SG_PI;
+
+ return angle;
+}
+
+float
+wxRadarBg::calcRelBearingDeg(float bearing, float heading)
+{
+ float angle = bearing - heading;
+
+ if (angle >= 180)
+ return angle -= 360;
+
+ if (angle < -180)
+ return angle += 360;
+
+ return angle;
+}
+
+
+void
+wxRadarBg::updateFont()
+{
+ float red = _font_node->getFloatValue("color/red");
+ float green = _font_node->getFloatValue("color/green");
+ float blue = _font_node->getFloatValue("color/blue");
+ float alpha = _font_node->getFloatValue("color/alpha");
+ _font_color.set(red, green, blue, alpha);
+
+ _font_size = _font_node->getFloatValue("size");
+ _font_spacing = _font_size * _font_node->getFloatValue("line-spacing");
+ string path = _font_node->getStringValue("name", DEFAULT_FONT);
+
+ SGPath tpath;
+ if (path[0] != '/') {
+ tpath = globals->get_fg_root();
+ tpath.append("Fonts");
+ tpath.append(path);
+ } else {
+ tpath = path;
+ }
+
+#if (FG_OSG_VERSION >= 21000)
+ osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
+ osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str(), fontOptions.get());
+#else
+ osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.c_str());
+#endif
+
+ if (font != 0) {
+ _font = font;
+ _font->setMinFilterHint(osg::Texture::NEAREST);
+ _font->setMagFilterHint(osg::Texture::NEAREST);
+ _font->setGlyphImageMargin(0);
+ _font->setGlyphImageMarginRatio(0);
+ }
+
+ for (int i=0;i<4;i++)
+ {
+ const float defaultColors[4][3] = {{0,1,1},{0,1,1},{1,0.5,0},{1,0,0}};
+ SGPropertyNode_ptr color_node = _font_node->getNode("tcas/color",i,true);
+ float red = color_node->getFloatValue("red",defaultColors[i][0]);
+ float green = color_node->getFloatValue("green",defaultColors[i][1]);
+ float blue = color_node->getFloatValue("blue",defaultColors[i][2]);
+ float alpha = color_node->getFloatValue("alpha",1);
+ _tcas_colors[i]=osg::Vec4(red, green, blue, alpha);
+ }
+}
+
+void
+wxRadarBg::valueChanged(SGPropertyNode*)
+{
+ updateFont();
+ _time = _interval;
+}
+
projects / flightgear.git / blobdiff