347 lines
13 KiB
C++
347 lines
13 KiB
C++
// groundradar.cxx - Background layer for the ATC radar.
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//
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// Copyright (C) 2007 Csaba Halasz.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <osg/Node>
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#include <osg/Geode>
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#include <osg/Geometry>
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#include <osg/Camera>
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#include <osg/Texture2D>
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#include <osgViewer/Viewer>
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#include <osgText/Text>
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#include <osgDB/Registry>
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#include <osgDB/ReaderWriter>
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#include <osgUtil/Tessellator>
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#include <Main/fg_props.hxx>
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#include <Main/globals.hxx>
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#include <Main/renderer.hxx>
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#include <Cockpit/panel.hxx>
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#include <Airports/simple.hxx>
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#include <Airports/runways.hxx>
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#include <Airports/pavement.hxx>
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#include <simgear/math/sg_geodesy.hxx>
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#include <simgear/math/beziercurve.hxx>
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#include "groundradar.hxx"
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static const char* airport_source_node_name = "airport-id-source";
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static const char* default_airport_node_name = "/sim/tower/airport-id";
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static const char* texture_node_name = "texture-name";
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static const char* default_texture_name = "Aircraft/Instruments/Textures/od_groundradar.rgb";
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static const char* range_source_node_name = "range-source";
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static const char* default_range_node_name = "/instrumentation/radar/range";
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struct SingleFrameCallback : public osg::Camera::DrawCallback
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{
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virtual void operator () (const osg::Camera& camera) const
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{
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const_cast<osg::Camera&>(camera).setNodeMask(0);
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}
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};
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GroundRadar::GroundRadar(SGPropertyNode *node)
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{
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_airport_node = fgGetNode(node->getStringValue(airport_source_node_name, default_airport_node_name), true);
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_range_node = fgGetNode(node->getStringValue(range_source_node_name, default_range_node_name), true);
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createTexture(node->getStringValue(texture_node_name, default_texture_name));
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updateTexture();
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_airport_node->addChangeListener(this);
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_range_node->addChangeListener(this);
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}
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GroundRadar::~GroundRadar()
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{
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_airport_node->removeChangeListener(this);
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_range_node->removeChangeListener(this);
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}
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void GroundRadar::valueChanged(SGPropertyNode*)
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{
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updateTexture();
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}
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inline static osg::Vec3 fromPolar(double fi, double r)
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{
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return osg::Vec3(sin(fi * SGD_DEGREES_TO_RADIANS) * r, cos(fi * SGD_DEGREES_TO_RADIANS) * r, 0);
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}
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void GroundRadar::createTexture(const char* texture_name)
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{
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setSize(TextureHalfSize + TextureHalfSize);
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allocRT();
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_geode = new osg::Geode();
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osg::StateSet* stateset = _geode->getOrCreateStateSet();
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stateset->setMode(GL_BLEND, osg::StateAttribute::OFF);
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osg::Vec4Array* taxi_color = new osg::Vec4Array;
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taxi_color->push_back(osg::Vec4(0.0f, 0.5f, 0.0f, 1.0f));
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osg::Vec4Array* rwy_color = new osg::Vec4Array;
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rwy_color->push_back(osg::Vec4(0.0f, 0.5f, 0.5f, 1.0f));
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osg::Geometry *taxi_geom = new osg::Geometry();
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taxi_geom->setColorArray(taxi_color);
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taxi_geom->setColorBinding(osg::Geometry::BIND_OVERALL);
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taxi_geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0)); // Taxiways
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_geode->addDrawable(taxi_geom);
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osg::Geometry *pvt_geom = new osg::Geometry();
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pvt_geom->setColorArray(taxi_color);
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pvt_geom->setColorBinding(osg::Geometry::BIND_OVERALL);
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// no primitive set for the moment. It needs tessellation
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_geode->addDrawable(pvt_geom);
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osg::Geometry *rwy_geom = new osg::Geometry();
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rwy_geom->setColorArray(rwy_color);
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rwy_geom->setColorBinding(osg::Geometry::BIND_OVERALL);
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rwy_geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0)); // Runways
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_geode->addDrawable(rwy_geom);
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osg::Camera* camera = getCamera();
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camera->setPostDrawCallback(new SingleFrameCallback());
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camera->addChild(_geode.get());
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camera->setNodeMask(0);
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camera->setProjectionMatrixAsOrtho2D(0, getTexture()->getTextureWidth(), 0, getTexture()->getTextureHeight());
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// Texture in the 2D panel system
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FGTextureManager::addTexture(texture_name, getTexture());
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}
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void GroundRadar::addRunwayVertices(const FGRunwayBase* aRunway, double aTowerLat, double aTowerLon, double aScale, osg::Vec3Array* aVertices)
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{
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double az1, az2, dist_m;
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geo_inverse_wgs_84(aTowerLat, aTowerLon, aRunway->latitude(), aRunway->longitude(), &az1, &az2, &dist_m);
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osg::Vec3 center = fromPolar(az1, dist_m * aScale) + osg::Vec3(TextureHalfSize, TextureHalfSize, 0);
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osg::Vec3 leftcenter = fromPolar(aRunway->headingDeg(), aRunway->lengthM() * aScale / 2) + center;
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osg::Vec3 lefttop = fromPolar(aRunway->headingDeg() - 90, aRunway->widthM() * aScale / 2) + leftcenter;
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osg::Vec3 leftbottom = leftcenter * 2 - lefttop;
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osg::Vec3 rightbottom = center * 2 - lefttop;
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osg::Vec3 righttop = center * 2 - leftbottom;
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aVertices->push_back(lefttop);
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aVertices->push_back(leftbottom);
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aVertices->push_back(rightbottom);
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aVertices->push_back(righttop);
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}
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osg::Geometry *GroundRadar::addPavementGeometry(const FGPavement* aPavement, double aTowerLat, double aTowerLon, double aScale)
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{
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osg::ref_ptr<osgUtil::Tessellator> tess = new osgUtil::Tessellator;
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osg::ref_ptr<osg::Geometry> polygon = new osg::Geometry;
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osg::ref_ptr<osg::Vec3Array> pts = new osg::Vec3Array;
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double az1, az2, dist_m;
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const FGPavement::NodeList &nodeLst = aPavement->getNodeList();
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FGPavement::NodeList::const_iterator it = nodeLst.begin(),
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loopBegin = it;
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while ( it != nodeLst.end() )
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{
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bool close = (*it)->mClose;
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geo_inverse_wgs_84(aTowerLat, aTowerLon, (*it)->mPos.getLatitudeDeg(), (*it)->mPos.getLongitudeDeg(), &az1, &az2, &dist_m);
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osg::Vec3 p1 = fromPolar(az1, dist_m * aScale) + osg::Vec3(TextureHalfSize, TextureHalfSize, 0);
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const FGPavement::BezierNode *bn = dynamic_cast<const FGPavement::BezierNode *>( it->ptr() );
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if ( bn != 0 )
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{
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geo_inverse_wgs_84(aTowerLat, aTowerLon, bn->mControl.getLatitudeDeg(), bn->mControl.getLongitudeDeg(), &az1, &az2, &dist_m);
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osg::Vec3 p2 = fromPolar(az1, dist_m * aScale) + osg::Vec3(TextureHalfSize, TextureHalfSize, 0),
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p3;
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++it;
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if ( it == nodeLst.end() || close )
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{
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geo_inverse_wgs_84(aTowerLat, aTowerLon, (*loopBegin)->mPos.getLatitudeDeg(), (*loopBegin)->mPos.getLongitudeDeg(), &az1, &az2, &dist_m);
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}
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else
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{
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geo_inverse_wgs_84(aTowerLat, aTowerLon, (*it)->mPos.getLatitudeDeg(), (*it)->mPos.getLongitudeDeg(), &az1, &az2, &dist_m);
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}
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p3 = fromPolar(az1, dist_m * aScale) + osg::Vec3(TextureHalfSize, TextureHalfSize, 0);
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simgear::BezierCurve<osg::Vec3> bCurv( p1, p2, p3 );
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simgear::BezierCurve<osg::Vec3>::PointList &ptList = bCurv.pointList();
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for ( simgear::BezierCurve<osg::Vec3>::PointList::iterator ii = ptList.begin(); ii != ptList.end(); ++ii )
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{
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pts->push_back( *ii );
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}
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pts->pop_back(); // Last point belongs to next segment
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}
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else
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{
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pts->push_back( p1 );
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++it;
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}
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if ( close ) // One loop for the moment
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break;
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}
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geo_inverse_wgs_84(aTowerLat, aTowerLon, (*loopBegin)->mPos.getLatitudeDeg(), (*loopBegin)->mPos.getLongitudeDeg(), &az1, &az2, &dist_m);
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osg::Vec3 p1 = fromPolar(az1, dist_m * aScale) + osg::Vec3(TextureHalfSize, TextureHalfSize, 0);
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pts->push_back( p1 );
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polygon->setVertexArray( pts );
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polygon->addPrimitiveSet( new osg::DrawArrays( osg::PrimitiveSet::POLYGON, 0, pts->size() ) );
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tess->setTessellationType( osgUtil::Tessellator::TESS_TYPE_GEOMETRY );
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tess->setBoundaryOnly( false );
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tess->setWindingType( osgUtil::Tessellator::TESS_WINDING_ODD );
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tess->retessellatePolygons( *polygon );
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return polygon.release();
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}
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void GroundRadar::updateTexture()
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{
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osg::ref_ptr<osg::Vec3Array> rwy_vertices = new osg::Vec3Array;
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osg::ref_ptr<osg::Vec3Array> taxi_vertices = new osg::Vec3Array;
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osg::ref_ptr<osg::Vec3Array> pvt_vertices = new osg::Vec3Array;
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const string airport_name = _airport_node->getStringValue();
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const FGAirport* airport = fgFindAirportID(airport_name);
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if (airport == 0)
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return;
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const SGGeod& tower_location = airport->getTowerLocation();
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const double tower_lat = tower_location.getLatitudeDeg();
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const double tower_lon = tower_location.getLongitudeDeg();
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double scale = SG_METER_TO_NM * 200 / _range_node->getDoubleValue();
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const FGAirport* apt = fgFindAirportID(airport_name);
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assert(apt);
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for (unsigned int i=0; i<apt->numTaxiways(); ++i)
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{
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FGTaxiway* txwy(apt->getTaxiwayByIndex(i));
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addRunwayVertices(txwy, tower_lat, tower_lon, scale, taxi_vertices.get());
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}
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osg::Geometry *taxi_geom = dynamic_cast<osg::Geometry *>(_geode->getDrawable(0));
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taxi_geom->setVertexArray(taxi_vertices.get());
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osg::DrawArrays* taxi = dynamic_cast<osg::DrawArrays*>(taxi_geom->getPrimitiveSet(0));
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taxi->setCount(taxi_vertices->size());
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osg::Geometry *pvt_geom = dynamic_cast<osg::Geometry *>(_geode->getDrawable(1));
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osg::Geometry::PrimitiveSetList &pvt_prim_list = pvt_geom->getPrimitiveSetList();
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pvt_prim_list.clear();
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for (unsigned int i=0; i<apt->numPavements(); ++i)
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{
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FGPavement* pvt(apt->getPavementByIndex(i));
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osg::ref_ptr<osg::Geometry> geom = addPavementGeometry(pvt, tower_lat, tower_lon, scale);
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osg::Geometry::PrimitiveSetList &prim_list = geom->getPrimitiveSetList();
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osg::Vec3Array *vertices = dynamic_cast<osg::Vec3Array *>(geom->getVertexArray());
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size_t before = pvt_vertices->size(),
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count = vertices->size();
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for (size_t i = 0; i < count; ++i )
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{
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pvt_vertices->push_back( (*vertices)[i] );
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}
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for (osg::Geometry::PrimitiveSetList::iterator ii = prim_list.begin(); ii != prim_list.end(); ++ii )
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{
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osg::DrawArrays *da;
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osg::DrawElementsUByte *de1;
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osg::DrawElementsUShort *de2;
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osg::DrawElementsUInt *de3;
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if ((da = dynamic_cast<osg::DrawArrays *>(ii->get())) != 0)
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{
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osg::DrawArrays *ps = new osg::DrawArrays(*da);
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ps->setFirst(da->getFirst() + before);
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pvt_prim_list.push_back(ps);
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}
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else if ((de1 = dynamic_cast<osg::DrawElementsUByte *>(ii->get())) != 0)
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{
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if (before + count <= 255)
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{
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osg::DrawElementsUByte *ps = new osg::DrawElementsUByte(*de1);
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for (size_t j = 0; j < ps->size(); ++j)
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{
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(*ps)[j] += before;
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}
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pvt_prim_list.push_back(ps);
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}
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else if (before + count <= 65535)
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{
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osg::DrawElementsUShort *ps = new osg::DrawElementsUShort(de1->getMode(), de1->begin(), de1->end());
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for (size_t j = 0; j < ps->size(); ++j)
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{
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(*ps)[j] += before;
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}
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pvt_prim_list.push_back(ps);
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}
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else
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{
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osg::DrawElementsUInt *ps = new osg::DrawElementsUInt(de1->getMode(), de1->begin(), de1->end());
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for (size_t j = 0; j < ps->size(); ++j)
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{
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(*ps)[j] += before;
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}
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pvt_prim_list.push_back(ps);
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}
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}
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else if ((de2 = dynamic_cast<osg::DrawElementsUShort *>(ii->get())) != 0)
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{
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if (before + count <= 65535)
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{
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osg::DrawElementsUShort *ps = new osg::DrawElementsUShort(*de2);
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for (size_t j = 0; j < ps->size(); ++j)
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{
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(*ps)[j] += before;
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}
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pvt_prim_list.push_back(ps);
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}
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else
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{
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osg::DrawElementsUInt *ps = new osg::DrawElementsUInt(de2->getMode(), de2->begin(), de2->end());
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for (size_t j = 0; j < ps->size(); ++j)
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{
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(*ps)[j] += before;
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}
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pvt_prim_list.push_back(ps);
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}
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}
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else if ((de3 = dynamic_cast<osg::DrawElementsUInt *>(ii->get())) != 0)
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{
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osg::DrawElementsUInt *ps = new osg::DrawElementsUInt(*de3);
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for (size_t j = 0; j < ps->size(); ++j)
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{
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(*ps)[j] += before;
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}
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pvt_prim_list.push_back(ps);
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}
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}
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}
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pvt_geom->setVertexArray(pvt_vertices.get());
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for (unsigned int i=0; i<apt->numRunways(); ++i)
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{
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FGRunway* runway(apt->getRunwayByIndex(i));
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if (runway->isReciprocal()) continue;
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addRunwayVertices(runway, tower_lat, tower_lon, scale, rwy_vertices.get());
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}
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osg::Geometry *rwy_geom = dynamic_cast<osg::Geometry *>(_geode->getDrawable(2));
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rwy_geom->setVertexArray(rwy_vertices.get());
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osg::DrawArrays* rwy = dynamic_cast<osg::DrawArrays*>(rwy_geom->getPrimitiveSet(0));
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rwy->setCount(rwy_vertices->size());
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getCamera()->setNodeMask(0xffffffff);
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}
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// end of GroundRadar.cxx
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