Mathias Fröhlich:

[flightgear.git] / src / Scenery / scenery.cxx

diff --git a/src/Scenery/scenery.cxx b/src/Scenery/scenery.cxx
index 4eea0869bc179fa7a9ef3e8e569ce39ea8cf9b63..88badf93eea9498ce85dc92804f8071ef04a3526 100644 (file)
--- a/src/Scenery/scenery.cxx
+++ b/src/Scenery/scenery.cxx
@@ -2,7 +2,7 @@
 //
 // 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
@@ -25,31 +25,164 @@
 #  include <config.h>
 #endif
 
-#ifdef HAVE_WINDOWS_H
-#  include <windows.h>
-#endif
-
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
-
 #include <stdio.h>
 #include <string.h>
 
 #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/fg_props.hxx>
+
+#include "hitlist.hxx"
 #include "scenery.hxx"
 
 
-// Shared structure to hold current scenery parameters
-struct fgSCENERY scenery;
+// Scenery Management system
+FGScenery::FGScenery() {
+    SG_LOG( SG_TERRAIN, SG_INFO, "Initializing scenery subsystem" );
+
+    center = Point3D(0.0);
+}
 
 
 // Initialize the Scenery Management system
-int fgSceneryInit( void ) {
-    SG_LOG( SG_TERRAIN, SG_INFO, "Initializing scenery subsystem" );
+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 );
+
+    aircraft_branch = new ssgBranch;
+    aircraft_branch->setName( "Aircraft" );
+    scene_graph->addKid( aircraft_branch );
+
+    // Lighting
+    gnd_lights_root = new ssgRoot;
+    gnd_lights_root->setName( "Ground Lighting Root" );
+
+    vasi_lights_root = new ssgRoot;
+    vasi_lights_root->setName( "VASI/PAPI Lighting Root" );
+
+    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) {
+}
+
+
+void FGScenery::bind() {
+}
+
+
+void FGScenery::unbind() {
+}
+
+void FGScenery::set_center( 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) {
+    trans->ref();
+    _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)->deRef();
+            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 = false;
+    }
+  }
 
-    scenery.center = Point3D(0.0);
-    scenery.cur_elev = -9999;
+  // 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);
+  }
 
-    return 1;
+  if (replaced_center)
+    set_center( saved_center );
+  
+  return hit;
 }