//
// Written by Curtis Olson, started May 1997.
//
-// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
+// Copyright (C) 1997 Curtis L. Olson - http://www.flightgear.org/~curt
//
// 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, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
# include <config.h>
#endif
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <GL/glut.h>
-#include <GL/gl.h>
-
#include <stdio.h>
#include <string.h>
+#include <osgUtil/IntersectVisitor>
+
#include <simgear/debug/logstream.hxx>
+#include <simgear/scene/tgdb/userdata.hxx>
+#include <simgear/math/sg_geodesy.hxx>
+#include <simgear/scene/model/placementtrans.hxx>
+#include <simgear/scene/material/matlib.hxx>
+#include <simgear/scene/util/SGNodeMasks.hxx>
#include <Main/fg_props.hxx>
// Scenery Management system
-FGScenery::FGScenery() {
+FGScenery::FGScenery() :
+ center(0, 0, 0)
+{
SG_LOG( SG_TERRAIN, SG_INFO, "Initializing scenery subsystem" );
-
- center = Point3D(0.0);
- cur_elev = -9999;
}
void FGScenery::init() {
// Scene graph root
- scene_graph = new ssgRoot;
+ scene_graph = new osg::Group;
scene_graph->setName( "Scene" );
- lighting = new ssgRoot;
- lighting->setName( "Lighting" );
-
// Terrain branch
- terrain_branch = new ssgBranch;
+ terrain_branch = new osg::Group;
terrain_branch->setName( "Terrain" );
- scene_graph->addKid( terrain_branch );
+ scene_graph->addChild( terrain_branch.get() );
- models_branch = new ssgBranch;
+ models_branch = new osg::Group;
models_branch->setName( "Models" );
- scene_graph->addKid( models_branch );
+ scene_graph->addChild( models_branch.get() );
- aircraft_branch = new ssgBranch;
+ aircraft_branch = new osg::Group;
aircraft_branch->setName( "Aircraft" );
- scene_graph->addKid( aircraft_branch );
+ scene_graph->addChild( aircraft_branch.get() );
// Lighting
- gnd_lights_branch = new ssgBranch;
- gnd_lights_branch->setName( "Ground Lighting" );
- lighting->addKid( gnd_lights_branch );
+ gnd_lights_root = new osg::Group;
+ gnd_lights_root->setName( "Ground Lighting Root" );
- rwy_lights_branch = new ssgBranch;
- rwy_lights_branch->setName( "Runway Lighting" );
- lighting->addKid( rwy_lights_branch );
+ vasi_lights_root = new osg::Group;
+ vasi_lights_root->setName( "VASI/PAPI Lighting Root" );
+
+ rwy_lights_root = new osg::Group;
+ rwy_lights_root->setName( "Runway Lighting Root" );
+
+ taxi_lights_root = new osg::Group;
+ taxi_lights_root->setName( "Taxi Lighting Root" );
+
+ // Initials values needed by the draw-time object loader
+ sgUserDataInit( globals->get_model_lib(), globals->get_fg_root(),
+ globals->get_props(), globals->get_sim_time_sec() );
}
void FGScenery::bind() {
- fgTie("/environment/ground-elevation-m", this,
- &FGScenery::get_cur_elev, &FGScenery::set_cur_elev);
}
void FGScenery::unbind() {
- fgUntie("/environment/ground-elevation-m");
}
+
+void FGScenery::set_center( const SGVec3d& p ) {
+ if (center == p)
+ return;
+ center = p;
+ placement_list_type::iterator it = _placement_list.begin();
+ while (it != _placement_list.end()) {
+ (*it)->setSceneryCenter(center);
+ ++it;
+ }
+}
+
+void FGScenery::register_placement_transform(SGPlacementTransform *trans) {
+ _placement_list.push_back(trans);
+ trans->setSceneryCenter(center);
+}
+
+void FGScenery::unregister_placement_transform(SGPlacementTransform *trans) {
+ placement_list_type::iterator it = _placement_list.begin();
+ while (it != _placement_list.end()) {
+ if ((*it) == trans) {
+ it = _placement_list.erase(it);
+ } else
+ ++it;
+ }
+}
+
+bool
+FGScenery::get_elevation_m(double lat, double lon, double max_alt,
+ double& alt, const SGMaterial** material,
+ bool exact)
+{
+ SGGeod geod = SGGeod::fromDegM(lon, lat, max_alt);
+ SGVec3d pos = SGVec3d::fromGeod(geod);
+ return get_cart_elevation_m(pos, 0, alt, material, exact);
+}
+
+bool
+FGScenery::get_cart_elevation_m(const SGVec3d& pos, double max_altoff,
+ double& alt, const SGMaterial** material,
+ bool exact)
+{
+ if ( norm1(pos) < 1 )
+ return false;
+
+ SGVec3d saved_center = center;
+ bool replaced_center = false;
+ if (exact) {
+ if (30*30 < distSqr(pos, center)) {
+ set_center( pos );
+ replaced_center = true;
+ }
+ }
+
+
+ SGVec3d start = pos + max_altoff*normalize(pos) - center;
+ SGVec3d end = - center;
+
+ osgUtil::IntersectVisitor intersectVisitor;
+ intersectVisitor.setTraversalMask(SG_NODEMASK_TERRAIN_BIT);
+ osg::ref_ptr<osg::LineSegment> lineSegment;
+ lineSegment = new osg::LineSegment(start.osg(), end.osg());
+ intersectVisitor.addLineSegment(lineSegment.get());
+ get_scene_graph()->accept(intersectVisitor);
+ bool hits = intersectVisitor.hits();
+ if (hits) {
+ int nHits = intersectVisitor.getNumHits(lineSegment.get());
+ alt = -SGLimitsd::max();
+ for (int i = 0; i < nHits; ++i) {
+ const osgUtil::Hit& hit
+ = intersectVisitor.getHitList(lineSegment.get())[i];
+ SGVec3d point;
+ point.osg() = hit.getWorldIntersectPoint();
+ point += center;
+ SGGeod geod = SGGeod::fromCart(point);
+ double elevation = geod.getElevationM();
+ if (alt < elevation) {
+ alt = elevation;
+ if (material)
+ *material = globals->get_matlib()->findMaterial(hit.getGeode());
+ }
+ }
+ }
+
+ if (replaced_center)
+ set_center( saved_center );
+
+ return hits;
+}
+
+bool
+FGScenery::get_cart_ground_intersection(const SGVec3d& pos, const SGVec3d& dir,
+ SGVec3d& nearestHit, bool exact)
+{
+ // We assume that starting positions in the center of the earth are invalid
+ if ( norm1(pos) < 1 )
+ return false;
+
+ // Well that 'exactness' is somehow problematic, but makes at least sure
+ // that we don't compute that with a cenery center at the other side of
+ // the world ...
+ SGVec3d saved_center = center;
+ bool replaced_center = false;
+ if (exact) {
+ if (30*30 < distSqr(pos, center)) {
+ set_center( pos );
+ replaced_center = true;
+ }
+ }
+
+ // Make really sure the direction is normalized, is really cheap compared to
+ // computation of ground intersection.
+ SGVec3d start = pos - center;
+ SGVec3d end = start + 1e5*dir;
+
+ osgUtil::IntersectVisitor intersectVisitor;
+ intersectVisitor.setTraversalMask(SG_NODEMASK_TERRAIN_BIT);
+ osg::ref_ptr<osg::LineSegment> lineSegment;
+ lineSegment = new osg::LineSegment(start.osg(), end.osg());
+ intersectVisitor.addLineSegment(lineSegment.get());
+ get_scene_graph()->accept(intersectVisitor);
+ bool hits = intersectVisitor.hits();
+ if (hits) {
+ int nHits = intersectVisitor.getNumHits(lineSegment.get());
+ double dist = SGLimitsd::max();
+ for (int i = 0; i < nHits; ++i) {
+ const osgUtil::Hit& hit
+ = intersectVisitor.getHitList(lineSegment.get())[i];
+ SGVec3d point;
+ point.osg() = hit.getWorldIntersectPoint();
+ double newdist = length(start - point);
+ if (newdist < dist) {
+ dist = newdist;
+ nearestHit = point + center;
+ }
+ }
+ }
+
+ if (replaced_center)
+ set_center( saved_center );
+
+ return hits;
+}
+
projects / flightgear.git / blobdiff