/**
* Constructor for virtual airspaces for use in range-based
* intersection queries
*
* @param loc Location about which to create a virtual airspace envelope
* @param task_projection projection to be used for flat-earth representation
* @param range range in meters of virtual bounding box
*
* @return dummy airspace envelope
*/
Airspace(const GeoPoint&loc, const TaskProjection& task_projection, const
fixed range=fixed_zero):
FlatBoundingBox(task_projection.project(loc),
task_projection.project_range(loc,range)),
pimpl_airspace(NULL)
{
};
gcc_pure
unsigned ProjectRange(const GeoPoint &location, fixed distance) const {
return task_projection.project_range(location, distance);
}