#include <simgear/constants.h>
#include <simgear/debug/logstream.hxx>
-#include <simgear/math/polar3d.hxx>
-#include <simgear/math/sg_geodesy.hxx>
#include <simgear/math/vector.hxx>
#include <simgear/structure/exception.hxx>
#include <simgear/scene/model/modellib.hxx>
// disk.
int FGTileMgr::update( double visibility_meters )
{
- SGLocation *location = globals->get_current_view()->getSGLocation();
- return update( location, visibility_meters );
+ SGVec3d viewPos = globals->get_current_view()->get_view_pos();
+ return update(SGGeod::fromCart(viewPos), visibility_meters);
}
-
-int FGTileMgr::update( SGLocation *location, double visibility_meters )
+int FGTileMgr::update( const SGGeod& location, double visibility_meters)
{
SG_LOG( SG_TERRAIN, SG_DEBUG, "FGTileMgr::update()" );
- longitude = location->getLongitude_deg();
- latitude = location->getLatitude_deg();
- // add 1.0m to the max altitude to give a little leeway to the
- // ground reaction code.
- altitude_m = location->getAltitudeASL_ft() * SG_FEET_TO_METER + 1.0;
+ longitude = location.getLongitudeDeg();
+ latitude = location.getLatitudeDeg();
- // if current altitude is apparently not initialized, set max
- // altitude to something big.
- if ( altitude_m < -1000 ) {
- altitude_m = 10000;
- }
// SG_LOG( SG_TERRAIN, SG_DEBUG, "FGTileMgr::update() for "
// << longitude << " " << latatitude );
- current_bucket.set_bucket( longitude, latitude );
+ current_bucket.set_bucket( location );
// SG_LOG( SG_TERRAIN, SG_DEBUG, "Updating tile list for "
// << current_bucket );
fgSetInt( "/environment/current-tile-id", current_bucket.gen_index() );
}
}
-bool FGTileMgr::scenery_available(double lat, double lon, double range_m)
+bool FGTileMgr::scenery_available(const SGGeod& position, double range_m)
{
// sanity check (unfortunately needed!)
- if ( lon <= -180.0 || lon >= 180.0 || lat <= -90.0 || lat >= 90.0 )
+ if (position.getLongitudeDeg() < -180 || position.getLongitudeDeg() > 180 ||
+ position.getLatitudeDeg() < -90 || position.getLatitudeDeg() > 90)
return false;
- SGBucket bucket(lon, lat);
+ SGBucket bucket(position);
TileEntry *te = tile_cache.get_tile(bucket);
if (!te || !te->is_loaded())
return false;
+ SGVec3d cartPos = SGVec3d::fromGeod(position);
+
// Traverse all tiles required to be there for the given visibility.
// This uses exactly the same algorithm like the tile scheduler.
double tile_width = bucket.get_width_m();
double tile_height = bucket.get_height_m();
+ double tile_r = 0.5*sqrt(tile_width*tile_width + tile_height*tile_height);
+ double max_dist = tile_r + range_m;
+ double max_dist2 = max_dist*max_dist;
int xrange = (int)fabs(range_m / tile_width) + 1;
int yrange = (int)fabs(range_m / tile_height) + 1;
for ( int y = -yrange; y <= yrange; ++y ) {
// We have already checked for the center tile.
if ( x != 0 || y != 0 ) {
- SGBucket b = sgBucketOffset( lon, lat, x, y );
+ SGBucket b = sgBucketOffset( position.getLongitudeDeg(),
+ position.getLatitudeDeg(), x, y );
+ // Do not ask if it is just the next tile but way out of range.
+ if (max_dist2 < distSqr(cartPos, SGVec3d::fromGeod(b.get_center())))
+ continue;
TileEntry *te = tile_cache.get_tile(b);
if (!te || !te->is_loaded())
return false;