wxBoundingBox Route::GetBBox( void )
{
if(!m_bNeedsUpdateBBox)
return RBBox;
double bbox_xmin = 180.; // set defaults
double bbox_ymin = 90.;
double bbox_xmax = -180;
double bbox_ymax = -90.;
RBBox.Reset();
// TODO: incorrect logic. It fails if a route crosses the idl and prime meridan.
m_bcrosses_idl = CalculateCrossesIDL();
wxRoutePointListNode *node = pRoutePointList->GetFirst();
RoutePoint *data;
if( !m_bcrosses_idl ) {
while( node ) {
data = node->GetData();
if( data->m_lon > bbox_xmax ) bbox_xmax = data->m_lon;
if( data->m_lon < bbox_xmin ) bbox_xmin = data->m_lon;
if( data->m_lat > bbox_ymax ) bbox_ymax = data->m_lat;
if( data->m_lat < bbox_ymin ) bbox_ymin = data->m_lat;
node = node->GetNext();
}
} else {
// For Routes that cross the IDL, we compute and store
// the bbox as positive definite
while( node ) {
data = node->GetData();
double lon = data->m_lon;
if( lon < 0. ) lon += 360.;
if( lon > bbox_xmax ) bbox_xmax = lon;
if( lon < bbox_xmin ) bbox_xmin = lon;
if( data->m_lat > bbox_ymax ) bbox_ymax = data->m_lat;
if( data->m_lat < bbox_ymin ) bbox_ymin = data->m_lat;
node = node->GetNext();
}
}
RBBox.Expand( bbox_xmin, bbox_ymin );
RBBox.Expand( bbox_xmax, bbox_ymax );
m_bNeedsUpdateBBox = false;
return RBBox;
}
void Route::CalculateBBox()
{
double bbox_xmin = 180.; // set defaults
double bbox_ymin = 90.;
double bbox_xmax = -180;
double bbox_ymax = -90.;
RBBox.Reset();
m_bcrosses_idl = CalculateCrossesIDL();
wxRoutePointListNode *node = pRoutePointList->GetFirst();
RoutePoint *data;
if( !m_bcrosses_idl ) {
while( node ) {
data = node->GetData();
if( data->m_lon > bbox_xmax ) bbox_xmax = data->m_lon;
if( data->m_lon < bbox_xmin ) bbox_xmin = data->m_lon;
if( data->m_lat > bbox_ymax ) bbox_ymax = data->m_lat;
if( data->m_lat < bbox_ymin ) bbox_ymin = data->m_lat;
node = node->GetNext();
}
} else {
// For Routes that cross the IDL, we compute and store
// the bbox as positive definite
while( node ) {
data = node->GetData();
double lon = data->m_lon;
if( lon < 0. ) lon += 360.;
if( lon > bbox_xmax ) bbox_xmax = lon;
if( lon < bbox_xmin ) bbox_xmin = lon;
if( data->m_lat > bbox_ymax ) bbox_ymax = data->m_lat;
if( data->m_lat < bbox_ymin ) bbox_ymin = data->m_lat;
node = node->GetNext();
}
}
RBBox.Expand( bbox_xmin, bbox_ymin );
RBBox.Expand( bbox_xmax, bbox_ymax );
}