//
// 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 <simgear/xgl.h>
-
#include <stdio.h>
#include <string.h>
-#include <simgear/logstream.hxx>
+#include <simgear/debug/logstream.hxx>
+#include <simgear/scene/tgdb/userdata.hxx>
+#include <simgear/math/sg_geodesy.hxx>
+#include <simgear/scene/model/placementtrans.hxx>
-#include <Main/options.hxx>
+#include <Main/fg_props.hxx>
+#include "hitlist.hxx"
#include "scenery.hxx"
-// Temporary hack until we get a better texture management system running
-GLint area_texture;
+// Scenery Management system
+FGScenery::FGScenery() {
+ SG_LOG( SG_TERRAIN, SG_INFO, "Initializing scenery subsystem" );
-
-// Shared structure to hold current scenery parameters
-struct fgSCENERY scenery;
+ center = Point3D(0.0);
+}
// Initialize the Scenery Management system
-int fgSceneryInit( void ) {
- fgOPTIONS *o;
- // char path[1024], fgpath[1024];
- // GLubyte *texbuf;
- // int width, height;
+FGScenery::~FGScenery() {
+}
+
+
+void FGScenery::init() {
+ // Scene graph root
+ scene_graph = new ssgRoot;
+ scene_graph->setName( "Scene" );
+
+ // Terrain branch
+ terrain_branch = new ssgBranch;
+ terrain_branch->setName( "Terrain" );
+ scene_graph->addKid( terrain_branch );
+
+ models_branch = new ssgBranch;
+ models_branch->setName( "Models" );
+ scene_graph->addKid( models_branch );
- o = ¤t_options;
+ aircraft_branch = new ssgBranch;
+ aircraft_branch->setName( "Aircraft" );
+ scene_graph->addKid( aircraft_branch );
- FG_LOG( FG_TERRAIN, FG_INFO, "Initializing scenery subsystem" );
+ // Lighting
+ gnd_lights_root = new ssgRoot;
+ gnd_lights_root->setName( "Ground Lighting Root" );
- scenery.cur_elev = -9999;
+ vasi_lights_root = new ssgRoot;
+ vasi_lights_root->setName( "VASI/PAPI Lighting Root" );
- return(1);
+ rwy_lights_root = new ssgRoot;
+ rwy_lights_root->setName( "Runway Lighting Root" );
+
+ taxi_lights_root = new ssgRoot;
+ 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::update(double dt) {
}
-// Tell the scenery manager where we are so it can load the proper data, and
-// build the proper structures.
-void fgSceneryUpdate(double lon, double lat, double elev) {
- // does nothing;
+void FGScenery::bind() {
}
-// Render out the current scene
-void fgSceneryRender( void ) {
+void FGScenery::unbind() {
}
+void FGScenery::set_center( const Point3D& p ) {
+ center = p;
+ sgdVec3 c;
+ sgdSetVec3(c, p.x(), p.y(), p.z());
+ placement_list_type::iterator it = _placement_list.begin();
+ while (it != _placement_list.end()) {
+ (*it)->setSceneryCenter(c);
+ ++it;
+ }
+}
+
+void FGScenery::register_placement_transform(ssgPlacementTransform *trans) {
+ _placement_list.push_back(trans);
+ sgdVec3 c;
+ sgdSetVec3(c, center.x(), center.y(), center.z());
+ trans->setSceneryCenter(c);
+}
+
+void FGScenery::unregister_placement_transform(ssgPlacementTransform *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, bool exact)
+{
+// std::cout << __PRETTY_FUNCTION__ << " "
+// << lat << " "
+// << lon << " "
+// << max_alt
+// << std::endl;
+ sgdVec3 pos;
+ sgGeodToCart(lat*SG_DEGREES_TO_RADIANS, lon*SG_DEGREES_TO_RADIANS,
+ max_alt, pos);
+ return get_cart_elevation_m(pos, 0, alt, exact);
+}
+
+bool
+FGScenery::get_cart_elevation_m(const sgdVec3& pos, double max_altoff,
+ double& alt, bool exact)
+{
+ Point3D saved_center = center;
+ bool replaced_center = false;
+ if (exact) {
+ Point3D ppos(pos[0], pos[1], pos[2]);
+ if (30.0*30.0 < ppos.distance3Dsquared(center)) {
+ set_center( ppos );
+ replaced_center = true;
+ }
+ }
+
+ // overridden with actual values if a terrain intersection is
+ // found
+ double hit_radius = 0.0;
+ sgdVec3 hit_normal = { 0.0, 0.0, 0.0 };
+
+ bool hit = false;
+ if ( fabs(pos[0]) > 1.0 || fabs(pos[1]) > 1.0 || fabs(pos[2]) > 1.0 ) {
+ sgdVec3 sc;
+ sgdSetVec3(sc, center[0], center[1], center[2]);
+
+ sgdVec3 ncpos;
+ sgdCopyVec3(ncpos, pos);
+
+ FGHitList hit_list;
+
+ // scenery center has been properly defined so any hit should
+ // be valid (and not just luck)
+ hit = fgCurrentElev(ncpos, max_altoff+sgdLengthVec3(pos),
+ sc, (ssgTransform*)get_scene_graph(),
+ &hit_list, &alt, &hit_radius, hit_normal);
+ }
+
+ if (replaced_center)
+ set_center( saved_center );
+
+ return hit;
+}
+
+
+bool
+FGScenery::get_cart_ground_intersection(const sgdVec3& pos,
+ const sgdVec3& dir,
+ sgdVec3& nearestHit, bool exact)
+{
+ // We assume that starting positions in the center of the earth are invalid
+ if ( fabs(pos[0]) < 1.0 && fabs(pos[1]) < 1.0 && fabs(pos[2]) < 1.0 )
+ 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 ...
+ Point3D saved_center = center;
+ bool replaced_center = false;
+ if (exact) {
+ Point3D ppos(pos[0], pos[1], pos[2]);
+ if (30.0*30.0 < ppos.distance3Dsquared(center)) {
+ set_center( ppos );
+ replaced_center = true;
+ }
+ }
+
+ // Not yet found any hit ...
+ bool result = false;
+
+ // Make really sure the direction is normalized, is really cheap compared to
+ // computation of ground intersection.
+ sgdVec3 normalizedDir;
+ sgdCopyVec3(normalizedDir, dir);
+ sgdNormaliseVec3(normalizedDir);
+
+ sgdVec3 sceneryCenter;
+ sgdSetVec3(sceneryCenter, center[0], center[1], center[2]);
+ sgdVec3 relativePos;
+ sgdSubVec3(relativePos, pos, sceneryCenter);
+
+ // At the moment only intersection with the terrain?
+ FGHitList hit_list;
+ hit_list.Intersect(globals->get_scenery()->get_terrain_branch(),
+ relativePos, normalizedDir);
+
+ double dist = DBL_MAX;
+ int hitcount = hit_list.num_hits();
+ for (int i = 0; i < hitcount; ++i) {
+ // Check for the nearest hit
+ sgdVec3 diff;
+ sgdSubVec3(diff, hit_list.get_point(i), relativePos);
+
+ // We only want hits in front of us ...
+ if (sgdScalarProductVec3(normalizedDir, diff) < 0)
+ continue;
+
+ // find the nearest hit
+ double nDist = sgdScalarProductVec3(diff, diff);
+ if (dist < nDist)
+ continue;
+
+ // Store the hit point
+ dist = nDist;
+ sgdAddVec3(nearestHit, hit_list.get_point(i), sceneryCenter);
+ result = true;
+ }
+
+ if (replaced_center)
+ set_center( saved_center );
+
+ return result;
+}
projects / flightgear.git / blobdiff