fly/flightgear
1
0
Fork 0
Code Activity
flightgear/src/Cockpit/wxradar.cxx
James Turner 6d0c2070fd Use future-proof SGPath APIs. 
Remove uses of .str(), .c_str() and some other methods of SGPath.
Pass SGPath directly where possible, or explicitly convert to the
appropriate 8-bit encoding.
2016-06-28 10:08:38 +01:00

1115 lines
38 KiB
C++
Raw Blame History

// 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
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//
#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 "panel.hxx" // for FGTextureManager
#include "od_gauge.hxx"
#include "wxradar.hxx"
#include <iostream> // for cout, endl
using std::cout;
using std::endl;
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 ()
{
_font_node->removeChangeListener(this);
}
void
wxRadarBg::init ()
{
_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 = SGLoadTexture2D(tpath, NULL, false, false);
_Instrument->setFloatValue("trk", 0.0);
_Instrument->setFloatValue("tilt", 0.0);
_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
// output status = STBY | TEST | WX | WXA | MAP | blank
// input lightning = true | false
// input TRK = +/- n degrees
// input TILT = +/- n degree
// input autotilt = true | false
// input range = n nm (20/40/80)
// input display-mode = arc | rose | map | plan
_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();
_time = 0.0;
}
void wxRadarBg::shutdown()
{
delete _odg;
_odg = NULL;
}
// 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 (!_sceneryLoaded->getBoolValue())
return;
if (!_odg || !_serviceable_node->getBoolValue()) {
_Instrument->setStringValue("status", "");
return;
}
_time += delta_time_sec;
if (_time < _interval)
return;
_time -= _interval;
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");
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);
}
//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;
}
} 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 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);
}
}
}
// 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;
}
osg::ref_ptr<osgDB::ReaderWriter::Options> fontOptions = new osgDB::ReaderWriter::Options("monochrome");
osg::ref_ptr<osgText::Font> font = osgText::readFontFile(tpath.local8BitStr(), fontOptions.get());
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;
}
View git blame Copy permalink