// radiostack.cxx -- class to manage an instance of the radio stack // // Written by Curtis Olson, started April 2000. // // Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License as // published by the Free Software Foundation; either version 2 of the // License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // // 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. // // $Id$ #ifdef HAVE_CONFIG_H # include #endif #include #include #include #include //#include #include #include #include #include #include "radiostack.hxx" #include SG_USING_STD(string); static int nav1_play_count = 0; static int nav2_play_count = 0; static int adf_play_count = 0; static time_t nav1_last_time = 0; static time_t nav2_last_time = 0; static time_t adf_last_time = 0; FGRadioStack *current_radiostack; /** * Boy, this is ugly! Make the VOR range vary by altitude difference. */ static double kludgeRange ( double stationElev, double aircraftElev, double nominalRange) { // Assume that the nominal range (usually // 50nm) applies at a 5,000 ft difference. // Just a wild guess! double factor = ((aircraftElev*SG_METER_TO_FEET) - stationElev) / 5000.0; double range = fabs(nominalRange * factor); // Clamp the range to keep it sane; for // now, never less than 25% or more than // 500% of nominal range. if (range < nominalRange/4.0) { range = nominalRange/4.0; } else if (range > nominalRange*5.0) { range = nominalRange*5.0; } return range; } // periodic radio station search wrapper static void fgRadioSearch( void ) { current_radiostack->search(); } // Constructor FGRadioStack::FGRadioStack() : lon_node(fgGetNode("/position/longitude-deg", true)), lat_node(fgGetNode("/position/latitude-deg", true)), alt_node(fgGetNode("/position/altitude-ft", true)), need_update(true), comm1_freq(0.0), comm1_alt_freq(0.0), comm2_freq(0.0), comm2_alt_freq(0.0), nav1_freq(0.0), nav1_alt_freq(0.0), nav1_radial(0.0), nav2_freq(0.0), nav2_alt_freq(0.0), nav2_radial(0.0), dme_freq(0.0), dme_dist(0.0), dme_prev_dist(0.0), dme_spd(0.0), dme_ete(0.0), adf_freq(0.0), adf_alt_freq(0.0) { SGPath path( globals->get_fg_root() ); SGPath term = path; term.append( "Navaids/range.term" ); SGPath low = path; low.append( "Navaids/range.low" ); SGPath high = path; high.append( "Navaids/range.high" ); term_tbl = new SGInterpTable( term.str() ); low_tbl = new SGInterpTable( low.str() ); high_tbl = new SGInterpTable( high.str() ); dme_last_time.stamp(); } // Destructor FGRadioStack::~FGRadioStack() { unbind(); // FIXME: should be called externally delete term_tbl; delete low_tbl; delete high_tbl; } void FGRadioStack::init () { morse.init(); beacon.init(); blink.stamp(); search(); update(); // Search radio database once per second global_events.Register( "fgRadioSearch()", fgRadioSearch, fgEVENT::FG_EVENT_READY, 1000); } void FGRadioStack::bind () { // User inputs fgTie("/radios/comm[0]/frequencies/selected-mhz", this, &FGRadioStack::get_comm1_freq, &FGRadioStack::set_comm1_freq); fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz"); fgTie("/radios/comm[0]/frequencies/standby-mhz", this, &FGRadioStack::get_comm1_alt_freq, &FGRadioStack::set_comm1_alt_freq); fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz"); fgTie("/radios/comm[0]/volume", this, &FGRadioStack::get_comm1_vol_btn, &FGRadioStack::set_comm1_vol_btn); fgSetArchivable("/radios/comm[0]/volume"); fgTie("/radios/comm[0]/ident", this, &FGRadioStack::get_comm1_ident_btn, &FGRadioStack::set_comm1_ident_btn); fgSetArchivable("/radios/comm[0]/ident"); fgTie("/radios/comm[1]/frequencies/selected-mhz", this, &FGRadioStack::get_comm2_freq, &FGRadioStack::set_comm2_freq); fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz"); fgTie("/radios/comm[1]/frequencies/standby-mhz", this, &FGRadioStack::get_comm2_alt_freq, &FGRadioStack::set_comm2_alt_freq); fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz"); fgTie("/radios/comm[1]/volume", this, &FGRadioStack::get_comm2_vol_btn, &FGRadioStack::set_comm2_vol_btn); fgSetArchivable("/radios/comm[0]/volume"); fgTie("/radios/comm[1]/ident", this, &FGRadioStack::get_comm2_ident_btn, &FGRadioStack::set_comm2_ident_btn); fgSetArchivable("/radios/comm[1]/ident"); fgTie("/radios/nav[0]/frequencies/selected-mhz", this, &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq); fgSetArchivable("/radios/nav[0]/frequencies/selected-mhz"); fgTie("/radios/nav[0]/frequencies/standby-mhz", this, &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq); fgSetArchivable("/radios/nav[0]/frequencies/standby-mhz"); fgTie("/radios/nav[0]/radials/selected-deg", this, &FGRadioStack::get_nav1_sel_radial, &FGRadioStack::set_nav1_sel_radial); fgSetArchivable("/radios/nav[0]/radials/selected-deg"); fgTie("/radios/nav[0]/volume", this, &FGRadioStack::get_nav1_vol_btn, &FGRadioStack::set_nav1_vol_btn); fgSetArchivable("/radios/nav[0]/volume"); fgTie("/radios/nav[0]/ident", this, &FGRadioStack::get_nav1_ident_btn, &FGRadioStack::set_nav1_ident_btn); fgSetArchivable("/radios/nav[0]/ident"); // Radio outputs fgTie("/radios/nav[0]/radials/actual-deg", this, &FGRadioStack::get_nav1_radial); fgTie("/radios/nav[0]/to-flag", this, &FGRadioStack::get_nav1_to_flag); fgTie("/radios/nav[0]/from-flag", this, &FGRadioStack::get_nav1_from_flag); fgTie("/radios/nav[0]/in-range", this, &FGRadioStack::get_nav1_inrange); fgTie("/radios/nav[0]/heading-needle-deflection", this, &FGRadioStack::get_nav1_heading_needle_deflection); fgTie("/radios/nav[0]/gs-needle-deflection", this, &FGRadioStack::get_nav1_gs_needle_deflection); // User inputs fgTie("/radios/nav[1]/frequencies/selected-mhz", this, &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq); fgSetArchivable("/radios/nav[1]/frequencies/selected-mhz"); fgTie("/radios/nav[1]/frequencies/standby-mhz", this, &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq); fgSetArchivable("/radios/nav[1]/frequencies/standby-mhz"); fgTie("/radios/nav[1]/radials/selected-deg", this, &FGRadioStack::get_nav2_sel_radial, &FGRadioStack::set_nav2_sel_radial); fgSetArchivable("/radios/nav[1]/radials/selected-deg"); fgTie("/radios/nav[1]/volume", this, &FGRadioStack::get_nav2_vol_btn, &FGRadioStack::set_nav2_vol_btn); fgSetArchivable("/radios/nav[1]/volume"); fgTie("/radios/nav[1]/ident", this, &FGRadioStack::get_nav2_ident_btn, &FGRadioStack::set_nav2_ident_btn); fgSetArchivable("/radios/nav[1]/ident"); // Radio outputs fgTie("/radios/nav[1]/radials/actual-deg", this, &FGRadioStack::get_nav2_radial); fgTie("/radios/nav[1]/to-flag", this, &FGRadioStack::get_nav2_to_flag); fgTie("/radios/nav[1]/from-flag", this, &FGRadioStack::get_nav2_from_flag); fgTie("/radios/nav[1]/in-range", this, &FGRadioStack::get_nav2_inrange); fgTie("/radios/nav[1]/heading-needle-deflection", this, &FGRadioStack::get_nav2_heading_needle_deflection); fgTie("/radios/nav[1]/gs-needle-deflection", this, &FGRadioStack::get_nav2_gs_needle_deflection); // User inputs fgTie("/radios/dme/frequencies/selected-khz", this, &FGRadioStack::get_dme_freq, &FGRadioStack::set_adf_freq); // Radio outputs fgTie("/radios/dme/in-range", this, &FGRadioStack::get_dme_inrange); fgTie("/radios/dme/distance-nm", this, &FGRadioStack::get_dme_dist); fgTie("/radios/dme/speed-kt", this, &FGRadioStack::get_dme_spd); fgTie("/radios/dme/ete-min", this, &FGRadioStack::get_dme_ete); // User inputs fgTie("/radios/adf/frequencies/selected-khz", this, &FGRadioStack::get_adf_freq, &FGRadioStack::set_adf_freq); fgSetArchivable("/radios/adf/frequencies/selected-khz"); fgTie("/radios/adf/frequencies/standby-khz", this, &FGRadioStack::get_adf_alt_freq, &FGRadioStack::set_adf_alt_freq); fgSetArchivable("/radios/adf/frequencies/standby-khz"); fgTie("/radios/adf/rotation-deg", this, &FGRadioStack::get_adf_rotation, &FGRadioStack::set_adf_rotation); fgSetArchivable("/radios/adf/rotation-deg"); fgTie("/radios/adf/volume", this, &FGRadioStack::get_adf_vol_btn, &FGRadioStack::set_adf_vol_btn); fgSetArchivable("/radios/adf/volume"); fgTie("/radios/adf/ident", this, &FGRadioStack::get_adf_ident_btn, &FGRadioStack::set_adf_ident_btn); fgSetArchivable("/radios/adf/ident"); fgTie("/radios/marker-beacon/inner", this, &FGRadioStack::get_inner_blink); fgTie("/radios/marker-beacon/middle", this, &FGRadioStack::get_middle_blink); fgTie("/radios/marker-beacon/outer", this, &FGRadioStack::get_outer_blink); } void FGRadioStack::unbind () { fgUntie("/radios/comm[0]/frequencies/selected-mhz"); fgUntie("/radios/comm[0]/frequencies/standby-mhz"); fgUntie("/radios/comm[0]/on"); fgUntie("/radios/comm[0]/ident"); fgUntie("/radios/comm[1]/frequencies/selected-mhz"); fgUntie("/radios/comm[1]/frequencies/standby-mhz"); fgUntie("/radios/comm[1]/on"); fgUntie("/radios/comm[1]/ident"); fgUntie("/radios/nav[0]/frequencies/selected-mhz"); fgUntie("/radios/nav[0]/frequencies/standby-mhz"); fgUntie("/radios/nav[0]/radials/actual-deg"); fgUntie("/radios/nav[0]/radials/selected-deg"); fgUntie("/radios/nav[0]/on"); fgUntie("/radios/nav[0]/ident"); fgUntie("/radios/nav[0]/to-flag"); fgUntie("/radios/nav[0]/from-flag"); fgUntie("/radios/nav[0]/in-range"); fgUntie("/radios/nav[0]/heading-needle-deflection"); fgUntie("/radios/nav[0]/gs-needle-deflection"); fgUntie("/radios/nav[1]/frequencies/selected-mhz"); fgUntie("/radios/nav[1]/frequencies/standby-mhz"); fgUntie("/radios/nav[1]/radials/actual-deg"); fgUntie("/radios/nav[1]/radials/selected-deg"); fgUntie("/radios/nav[1]/on"); fgUntie("/radios/nav[1]/ident"); fgUntie("/radios/nav[1]/to-flag"); fgUntie("/radios/nav[1]/from-flag"); fgUntie("/radios/nav[1]/in-range"); fgUntie("/radios/nav[1]/heading-needle-deflection"); fgUntie("/radios/nav[1]/gs-needle-deflection"); fgUntie("/radios/dme/frequencies/selected-khz"); // Radio outputs fgUntie("/radios/dme/in-range"); fgUntie("/radios/dme/distance-nm"); fgUntie("/radios/dme/speed-kt"); fgUntie("/radios/dme/ete-min"); fgUntie("/radios/adf/frequencies/selected-khz"); fgUntie("/radios/adf/frequencies/standby-khz"); fgUntie("/radios/adf/rotation-deg"); fgUntie("/radios/adf/on"); fgUntie("/radios/adf/ident"); fgUntie("/radios/marker-beacon/inner"); fgUntie("/radios/marker-beacon/middle"); fgUntie("/radios/marker-beacon/outer"); } // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8 double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev, double nominalRange ) { // extend out actual usable range to be 1.3x the published safe range const double usability_factor = 1.3; // assumptions we model the standard service volume, plus // ... rather than specifying a cylinder, we model a cone that // contains the cylinder. Then we put an upside down cone on top // to model diminishing returns at too-high altitudes. // altitude difference double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev ); // cout << "aircraft elev = " << aircraftElev * SG_METER_TO_FEET // << " station elev = " << stationElev << endl; if ( nominalRange < 25.0 + SG_EPSILON ) { // Standard Terminal Service Volume return term_tbl->interpolate( alt ) * usability_factor; } else if ( nominalRange < 50.0 + SG_EPSILON ) { // Standard Low Altitude Service Volume // table is based on range of 40, scale to actual range return low_tbl->interpolate( alt ) * nominalRange / 40.0 * usability_factor; } else { // Standard High Altitude Service Volume // table is based on range of 130, scale to actual range return high_tbl->interpolate( alt ) * nominalRange / 130.0 * usability_factor; } } // model standard ILS service volumes as per AIM 1-1-9 double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev, double offsetDegrees, double distance ) { // assumptions we model the standard service volume, plus // altitude difference // double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev ); double offset = fabs( offsetDegrees ); if ( offset < 10 ) { return FG_ILS_DEFAULT_RANGE; } else if ( offset < 35 ) { return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25; } else if ( offset < 45 ) { return (45 - offset); } else if ( offset > 170 ) { return FG_ILS_DEFAULT_RANGE; } else if ( offset > 145 ) { return 10 + (offset - 145) * (FG_ILS_DEFAULT_RANGE - 10) / 25; } else if ( offset > 135 ) { return (offset - 135); } else { return 0; } } // Update the various nav values based on position and valid tuned in navs void FGRadioStack::update() { //DCL string transmission; double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS; double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS; double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER; need_update = false; Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) ); Point3D station; double az1, az2, s; //////////////////////////////////////////////////////////////////////// // Comm1. //////////////////////////////////////////////////////////////////////// static bool repeating_message_registered = false; static int dcl_i = 0; //Hack to only call the transmission now and then - should use the event scheduler if ( comm1_valid ) { station = Point3D( comm1_x, comm1_y, comm1_z ); comm1_dist = aircraft.distance3D( station ); if ( comm1_dist < comm1_effective_range * SG_NM_TO_METER ) { comm1_inrange = true; // TODO - only get the transmission and register every now and then if(dcl_i == 0) { transmission = atis.get_transmission(); current_atcdisplay->ChangeRepeatingMessage(transmission); } if(!repeating_message_registered) { current_atcdisplay->RegisterRepeatingMessage(transmission); repeating_message_registered = true; } dcl_i++; if(dcl_i == 2000) { dcl_i = 0; } } else { comm1_inrange = false; if(repeating_message_registered) { current_atcdisplay->CancelRepeatingMessage(); repeating_message_registered = false; } dcl_i = 0; } } else { comm1_inrange = false; if(repeating_message_registered) { current_atcdisplay->CancelRepeatingMessage(); repeating_message_registered = false; } dcl_i = 0; // cout << "not picking up comm1. :-(" << endl; } //////////////////////////////////////////////////////////////////////// // Nav1. //////////////////////////////////////////////////////////////////////// if ( nav1_valid ) { station = Point3D( nav1_x, nav1_y, nav1_z ); nav1_loc_dist = aircraft.distance3D( station ); if ( nav1_has_gs ) { station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z ); nav1_gs_dist = aircraft.distance3D( station ); } else { nav1_gs_dist = 0.0; } // wgs84 heading geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES, nav1_loclat, nav1_loclon, &az1, &az2, &s ); // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl; nav1_heading = az1 - nav1_magvar; // cout << " heading = " << nav1_heading // << " dist = " << nav1_dist << endl; if ( nav1_loc ) { double offset = nav1_heading - nav1_radial; while ( offset < -180.0 ) { offset += 360.0; } while ( offset > 180.0 ) { offset -= 360.0; } // cout << "ils offset = " << offset << endl; nav1_effective_range = adjustILSRange(nav1_elev, elev, offset, nav1_loc_dist * SG_METER_TO_NM ); } else { nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range); } // cout << "nav1 range = " << nav1_effective_range // << " (" << nav1_range << ")" << endl; if ( nav1_loc_dist < nav1_effective_range * SG_NM_TO_METER ) { nav1_inrange = true; } else if ( nav1_loc_dist < 2 * nav1_effective_range * SG_NM_TO_METER ) { nav1_inrange = sg_random() < ( 2 * nav1_effective_range * SG_NM_TO_METER - nav1_loc_dist ) / (nav1_effective_range * SG_NM_TO_METER); } else { nav1_inrange = false; } if ( !nav1_loc ) { nav1_radial = nav1_sel_radial; } } else { nav1_inrange = false; // cout << "not picking up vor. :-(" << endl; } #ifdef ENABLE_AUDIO_SUPPORT if ( nav1_valid && nav1_inrange ) { // play station ident via audio system if on + ident, // otherwise turn it off if ( nav1_vol_btn > 0.1 && nav1_ident_btn ) { FGSimpleSound *sound; sound = globals->get_soundmgr()->find( "nav1-vor-ident" ); sound->set_volume( nav1_vol_btn * 0.3 ); sound = globals->get_soundmgr()->find( "nav1-dme-ident" ); sound->set_volume( nav1_vol_btn * 0.3 ); if ( nav1_last_time < globals->get_time_params()->get_cur_time() - 30 ) { nav1_last_time = globals->get_time_params()->get_cur_time(); nav1_play_count = 0; } if ( nav1_play_count < 4 ) { // play VOR ident if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") ) { globals->get_soundmgr()->play_once( "nav1-vor-ident" ); ++nav1_play_count; } } else if ( nav1_play_count < 5 && nav1_has_dme ) { // play DME ident if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") && !globals->get_soundmgr()->is_playing("nav1-dme-ident") ) { globals->get_soundmgr()->play_once( "nav1-dme-ident" ); ++nav1_play_count; } } } else { globals->get_soundmgr()->stop( "nav1-vor-ident" ); globals->get_soundmgr()->stop( "nav1-dme-ident" ); } } #endif //////////////////////////////////////////////////////////////////////// // Nav2. //////////////////////////////////////////////////////////////////////// if ( nav2_valid ) { station = Point3D( nav2_x, nav2_y, nav2_z ); nav2_loc_dist = aircraft.distance3D( station ); if ( nav2_has_gs ) { station = Point3D( nav2_gs_x, nav2_gs_y, nav2_gs_z ); nav2_gs_dist = aircraft.distance3D( station ); } else { nav2_gs_dist = 0.0; } // wgs84 heading geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES, nav2_loclat, nav2_loclon, &az1, &az2, &s ); nav2_heading = az1 - nav2_magvar; // cout << " heading = " << nav2_heading // << " dist = " << nav2_dist << endl; if ( nav2_loc ) { double offset = nav2_heading - nav2_radial; while ( offset < -180.0 ) { offset += 360.0; } while ( offset > 180.0 ) { offset -= 360.0; } // cout << "ils offset = " << offset << endl; nav2_effective_range = adjustILSRange(nav2_elev, elev, offset, nav2_loc_dist * SG_METER_TO_NM ); } else { nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range); } // cout << "nav2 range = " << nav2_effective_range // << " (" << nav2_range << ")" << endl; if ( nav2_loc_dist < nav2_effective_range * SG_NM_TO_METER ) { nav2_inrange = true; } else if ( nav2_loc_dist < 2 * nav2_effective_range * SG_NM_TO_METER ) { nav2_inrange = sg_random() < ( 2 * nav2_effective_range * SG_NM_TO_METER - nav2_loc_dist ) / (nav2_effective_range * SG_NM_TO_METER); } else { nav2_inrange = false; } if ( !nav2_loc ) { nav2_radial = nav2_sel_radial; } } else { nav2_inrange = false; // cout << "not picking up vor. :-(" << endl; } #ifdef ENABLE_AUDIO_SUPPORT if ( nav2_valid && nav2_inrange ) { // play station ident via audio system if on + ident, // otherwise turn it off if ( nav2_vol_btn > 0.1 && nav2_ident_btn ) { FGSimpleSound *sound; sound = globals->get_soundmgr()->find( "nav2-vor-ident" ); sound->set_volume( nav2_vol_btn * 0.3 ); sound = globals->get_soundmgr()->find( "nav2-dme-ident" ); sound->set_volume( nav2_vol_btn * 0.3 ); if ( nav2_last_time < globals->get_time_params()->get_cur_time() - 30 ) { nav2_last_time = globals->get_time_params()->get_cur_time(); nav2_play_count = 0; } if ( nav2_play_count < 4 ) { // play VOR ident if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) { globals->get_soundmgr()->play_once( "nav2-vor-ident" ); ++nav2_play_count; } } else if ( nav2_play_count < 5 && nav2_has_dme ) { // play DME ident if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") && !globals->get_soundmgr()->is_playing("nav2-dme-ident") ) { globals->get_soundmgr()->play_once( "nav2-dme-ident" ); ++nav2_play_count; } } } else { globals->get_soundmgr()->stop( "nav2-vor-ident" ); globals->get_soundmgr()->stop( "nav2-dme-ident" ); } } #endif //////////////////////////////////////////////////////////////////////// // DME. //////////////////////////////////////////////////////////////////////// if (dme_valid) { station = Point3D( dme_x, dme_y, dme_z ); dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM; dme_effective_range = kludgeRange(dme_elev, elev, dme_range); if (dme_dist < dme_effective_range * SG_NM_TO_METER) { dme_inrange = true; } else if (dme_dist < 2 * dme_effective_range * SG_NM_TO_METER) { dme_inrange = sg_random() < (2 * dme_effective_range * SG_NM_TO_METER - dme_dist) / (dme_effective_range * SG_NM_TO_METER); } else { dme_inrange = false; } if (dme_inrange) { SGTimeStamp current_time; station = Point3D( dme_x, dme_y, dme_z ); dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM; current_time.stamp(); long dMs = (current_time - dme_last_time) / 1000; // Update every second if (dMs >= 1000) { double dDist = dme_dist - dme_prev_dist; dme_spd = fabs((dDist/dMs) * 3600000); // FIXME: the panel should be able to // handle this!!! if (dme_spd > 999.0) dme_spd = 999.0; dme_ete = fabs((dme_dist/dme_spd) * 60.0); // FIXME: the panel should be able to // handle this!!! if (dme_ete > 99.0) dme_ete = 99.0; dme_prev_dist = dme_dist; dme_last_time.stamp(); } } } else { dme_inrange = false; dme_dist = 0.0; dme_prev_dist = 0.0; } //////////////////////////////////////////////////////////////////////// // ADF //////////////////////////////////////////////////////////////////////// if ( adf_valid ) { // staightline distance station = Point3D( adf_x, adf_y, adf_z ); adf_dist = aircraft.distance3D( station ); // wgs84 heading geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES, adf_lat, adf_lon, &az1, &az2, &s ); adf_heading = az1; // cout << " heading = " << nav2_heading // << " dist = " << nav2_dist << endl; adf_effective_range = kludgeRange(adf_elev, elev, adf_range); if ( adf_dist < adf_effective_range * SG_NM_TO_METER ) { adf_inrange = true; } else if ( adf_dist < 2 * adf_effective_range * SG_NM_TO_METER ) { adf_inrange = sg_random() < ( 2 * adf_effective_range * SG_NM_TO_METER - adf_dist ) / (adf_effective_range * SG_NM_TO_METER); } else { adf_inrange = false; } } else { adf_inrange = false; } #ifdef ENABLE_AUDIO_SUPPORT if ( adf_valid && adf_inrange ) { // play station ident via audio system if on + ident, // otherwise turn it off if ( adf_vol_btn > 0.1 && adf_ident_btn ) { FGSimpleSound *sound; sound = globals->get_soundmgr()->find( "adf-ident" ); sound->set_volume( adf_vol_btn * 0.3 ); if ( adf_last_time < globals->get_time_params()->get_cur_time() - 30 ) { adf_last_time = globals->get_time_params()->get_cur_time(); adf_play_count = 0; } if ( adf_play_count < 4 ) { // play ADF ident if ( !globals->get_soundmgr()->is_playing("adf-ident") ) { globals->get_soundmgr()->play_once( "adf-ident" ); ++adf_play_count; } } } else { globals->get_soundmgr()->stop( "adf-ident" ); } } #endif // marker beacon blinking bool light_on = ( outer_blink || middle_blink || inner_blink ); SGTimeStamp current; current.stamp(); if ( light_on && (current - blink > 400000) ) { light_on = false; blink.stamp(); } else if ( !light_on && (current - blink > 100000) ) { light_on = true; blink.stamp(); } if ( outer_marker ) { outer_blink = light_on; } else { outer_blink = false; } if ( middle_marker ) { middle_blink = light_on; } else { middle_blink = false; } if ( inner_marker ) { inner_blink = light_on; } else { inner_blink = false; } // cout << outer_blink << " " << middle_blink << " " << inner_blink << endl; } // Update current nav/adf radio stations based on current postition void FGRadioStack::search() { static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON; double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS; double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS; double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER; // FIXME: the panel should handle this // don't worry about overhead for now, // since this is handled only periodically int dme_switch_pos = fgGetInt("/panel/dme/switch-position"); if (dme_switch_pos == 0) { dme_freq = 0; dme_inrange = false; } else if (dme_switch_pos == 1) { if (dme_freq != nav1_freq) { dme_freq = nav1_freq; need_update = true; } } else if (dme_switch_pos == 3) { if (dme_freq != nav2_freq) { dme_freq = nav2_freq; need_update = true; } } FGILS ils; FGNav nav; static string last_comm1_ident = ""; static string last_comm2_ident = ""; static string last_nav1_ident = ""; static string last_nav2_ident = ""; static string last_adf_ident = ""; static bool last_nav1_vor = false; static bool last_nav2_vor = false; //////////////////////////////////////////////////////////////////////// // Comm1. //////////////////////////////////////////////////////////////////////// if ( current_atislist->query( lon, lat, elev, comm1_freq, &atis ) ) { //cout << "atis found in radiostack search !!!!" << endl; comm1_ident = atis.get_ident(); comm1_valid = true; if ( last_comm1_ident != comm1_ident ) { //nav1_trans_ident = ils.get_trans_ident(); last_comm1_ident = comm1_ident; comm1_elev = atis.get_elev(); comm1_range = FG_ATIS_DEFAULT_RANGE; comm1_effective_range = comm1_range; comm1_x = atis.get_x(); comm1_y = atis.get_y(); comm1_z = atis.get_z(); //cout << "Found a new atis station in range" << endl; //cout << " id = " << atis.get_ident() << endl; } } else { comm1_valid = false; comm1_ident = ""; //comm1_trans_ident = ""; last_comm1_ident = ""; // cout << "not picking up atis" << endl; } //////////////////////////////////////////////////////////////////////// // Nav1. //////////////////////////////////////////////////////////////////////// if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) { nav1_ident = ils.get_locident(); nav1_valid = true; if ( last_nav1_ident != nav1_ident || last_nav1_vor ) { nav1_trans_ident = ils.get_trans_ident(); last_nav1_ident = nav1_ident; last_nav1_vor = false; nav1_loc = true; nav1_has_dme = ils.get_has_dme(); nav1_has_gs = ils.get_has_gs(); nav1_loclon = ils.get_loclon(); nav1_loclat = ils.get_loclat(); nav1_gslon = ils.get_gslon(); nav1_gslat = ils.get_gslat(); nav1_elev = ils.get_gselev(); nav1_magvar = 0; nav1_range = FG_ILS_DEFAULT_RANGE; nav1_effective_range = nav1_range; nav1_target_gs = ils.get_gsangle(); nav1_radial = ils.get_locheading(); while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; } while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; } nav1_x = ils.get_x(); nav1_y = ils.get_y(); nav1_z = ils.get_z(); nav1_gs_x = ils.get_gs_x(); nav1_gs_y = ils.get_gs_y(); nav1_gs_z = ils.get_gs_z(); #ifdef ENABLE_AUDIO_SUPPORT if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) { globals->get_soundmgr()->remove( "nav1-vor-ident" ); } FGSimpleSound *sound; sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav1-vor-ident" ); if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) { globals->get_soundmgr()->remove( "nav1-dme-ident" ); } sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav1-dme-ident" ); int offset = (int)(sg_random() * 30.0); nav1_play_count = offset / 4; nav1_last_time = globals->get_time_params()->get_cur_time() - offset; // cout << "offset = " << offset << " play_count = " // << nav1_play_count // << " nav1_last_time = " << nav1_last_time // << " current time = " // << globals->get_time_params()->get_cur_time() << endl; #endif // cout << "Found an ils station in range" << endl; // cout << " id = " << ils.get_locident() << endl; } } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) { nav1_ident = nav.get_ident(); nav1_valid = true; if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) { last_nav1_ident = nav1_ident; last_nav1_vor = true; nav1_trans_ident = nav.get_trans_ident(); nav1_loc = false; nav1_has_dme = nav.get_has_dme(); nav1_has_gs = false; nav1_loclon = nav.get_lon(); nav1_loclat = nav.get_lat(); nav1_elev = nav.get_elev(); nav1_magvar = nav.get_magvar(); nav1_range = nav.get_range(); nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range); nav1_target_gs = 0.0; nav1_radial = nav1_sel_radial; nav1_x = nav.get_x(); nav1_y = nav.get_y(); nav1_z = nav.get_z(); #ifdef ENABLE_AUDIO_SUPPORT if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) { globals->get_soundmgr()->remove( "nav1-vor-ident" ); } FGSimpleSound *sound; sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav1-vor-ident" ); if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) { globals->get_soundmgr()->remove( "nav1-dme-ident" ); } sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav1-dme-ident" ); int offset = (int)(sg_random() * 30.0); nav1_play_count = offset / 4; nav1_last_time = globals->get_time_params()->get_cur_time() - offset; // cout << "offset = " << offset << " play_count = " // << nav1_play_count << " nav1_last_time = " // << nav1_last_time << " current time = " // << globals->get_time_params()->get_cur_time() << endl; #endif // cout << "Found a vor station in range" << endl; // cout << " id = " << nav.get_ident() << endl; } } else { nav1_valid = false; nav1_ident = ""; nav1_radial = 0; nav1_trans_ident = ""; last_nav1_ident = ""; #ifdef ENABLE_AUDIO_SUPPORT globals->get_soundmgr()->remove( "nav1-vor-ident" ); globals->get_soundmgr()->remove( "nav1-dme-ident" ); #endif // cout << "not picking up vor1. :-(" << endl; } //////////////////////////////////////////////////////////////////////// // Nav2. //////////////////////////////////////////////////////////////////////// if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) { nav2_ident = ils.get_locident(); nav2_valid = true; if ( last_nav2_ident != nav2_ident || last_nav2_vor ) { last_nav2_ident = nav2_ident; last_nav2_vor = false; nav2_trans_ident = ils.get_trans_ident(); nav2_loc = true; nav2_has_dme = ils.get_has_dme(); nav2_has_gs = ils.get_has_gs(); nav2_loclon = ils.get_loclon(); nav2_loclat = ils.get_loclat(); nav2_elev = ils.get_gselev(); nav2_magvar = 0; nav2_range = FG_ILS_DEFAULT_RANGE; nav2_effective_range = nav2_range; nav2_target_gs = ils.get_gsangle(); nav2_radial = ils.get_locheading(); while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; } while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; } nav2_x = ils.get_x(); nav2_y = ils.get_y(); nav2_z = ils.get_z(); nav2_gs_x = ils.get_gs_x(); nav2_gs_y = ils.get_gs_y(); nav2_gs_z = ils.get_gs_z(); #ifdef ENABLE_AUDIO_SUPPORT if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) { globals->get_soundmgr()->remove( "nav2-vor-ident" ); } FGSimpleSound *sound; sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav2-vor-ident" ); if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) { globals->get_soundmgr()->remove( "nav2-dme-ident" ); } sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav2-dme-ident" ); int offset = (int)(sg_random() * 30.0); nav2_play_count = offset / 4; nav2_last_time = globals->get_time_params()->get_cur_time() - offset; // cout << "offset = " << offset << " play_count = " // << nav2_play_count << " nav2_last_time = " // << nav2_last_time << " current time = " // << globals->get_time_params()->get_cur_time() << endl; #endif // cout << "Found an ils station in range" << endl; // cout << " id = " << ils.get_locident() << endl; } } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) { nav2_ident = nav.get_ident(); nav2_valid = true; if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) { last_nav2_ident = nav2_ident; last_nav2_vor = true; nav2_trans_ident = nav.get_trans_ident(); nav2_loc = false; nav2_has_dme = nav.get_has_dme(); nav2_has_dme = false; nav2_loclon = nav.get_lon(); nav2_loclat = nav.get_lat(); nav2_elev = nav.get_elev(); nav2_magvar = nav.get_magvar(); nav2_range = nav.get_range(); nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range); nav2_target_gs = 0.0; nav2_radial = nav2_sel_radial; nav2_x = nav.get_x(); nav2_y = nav.get_y(); nav2_z = nav.get_z(); #ifdef ENABLE_AUDIO_SUPPORT if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) { globals->get_soundmgr()->remove( "nav2-vor-ident" ); } FGSimpleSound *sound; sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav2-vor-ident" ); if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) { globals->get_soundmgr()->remove( "nav2-dme-ident" ); } sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "nav2-dme-ident" ); int offset = (int)(sg_random() * 30.0); nav2_play_count = offset / 4; nav2_last_time = globals->get_time_params()->get_cur_time() - offset; // cout << "offset = " << offset << " play_count = " // << nav2_play_count << " nav2_last_time = " // << nav2_last_time << " current time = " // << globals->get_time_params()->get_cur_time() << endl; #endif // cout << "Found a vor station in range" << endl; // cout << " id = " << nav.get_ident() << endl; } } else { nav2_valid = false; nav2_ident = ""; nav2_radial = 0; nav2_trans_ident = ""; last_nav2_ident = ""; #ifdef ENABLE_AUDIO_SUPPORT globals->get_soundmgr()->remove( "nav2-vor-ident" ); globals->get_soundmgr()->remove( "nav2-dme-ident" ); #endif // cout << "not picking up vor1. :-(" << endl; } //////////////////////////////////////////////////////////////////////// // DME //////////////////////////////////////////////////////////////////////// if ( current_ilslist->query( lon, lat, elev, dme_freq, &ils ) ) { if (ils.get_has_dme()) { dme_valid = true; dme_lon = ils.get_loclon(); dme_lat = ils.get_loclat(); dme_elev = ils.get_gselev(); dme_range = FG_ILS_DEFAULT_RANGE; dme_effective_range = kludgeRange(dme_elev, elev, dme_range); dme_x = ils.get_dme_x(); dme_y = ils.get_dme_y(); dme_z = ils.get_dme_z(); } } else if ( current_navlist->query( lon, lat, elev, dme_freq, &nav ) ) { if (nav.get_has_dme()) { dme_valid = true; dme_lon = nav.get_lon(); dme_lat = nav.get_lat(); dme_elev = nav.get_elev(); dme_range = nav.get_range(); dme_effective_range = kludgeRange(dme_elev, elev, dme_range); dme_x = nav.get_x(); dme_y = nav.get_y(); dme_z = nav.get_z(); } } else { dme_valid = false; dme_dist = 0; } //////////////////////////////////////////////////////////////////////// // Beacons. //////////////////////////////////////////////////////////////////////// FGMkrBeacon::fgMkrBeacType beacon_type = current_beacons->query( lon * SGD_RADIANS_TO_DEGREES, lat * SGD_RADIANS_TO_DEGREES, elev ); outer_marker = middle_marker = inner_marker = false; if ( beacon_type == FGMkrBeacon::OUTER ) { outer_marker = true; // cout << "OUTER MARKER" << endl; #ifdef ENABLE_AUDIO_SUPPORT if ( last_beacon != FGMkrBeacon::OUTER ) { if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) { FGSimpleSound *sound = beacon.get_outer(); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "outer-marker" ); } if ( !globals->get_soundmgr()->is_playing("outer-marker") ) { globals->get_soundmgr()->play_looped( "outer-marker" ); } } #endif } else if ( beacon_type == FGMkrBeacon::MIDDLE ) { middle_marker = true; // cout << "MIDDLE MARKER" << endl; #ifdef ENABLE_AUDIO_SUPPORT if ( last_beacon != FGMkrBeacon::MIDDLE ) { if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) { FGSimpleSound *sound = beacon.get_middle(); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "middle-marker" ); } if ( !globals->get_soundmgr()->is_playing("middle-marker") ) { globals->get_soundmgr()->play_looped( "middle-marker" ); } } #endif } else if ( beacon_type == FGMkrBeacon::INNER ) { inner_marker = true; // cout << "INNER MARKER" << endl; #ifdef ENABLE_AUDIO_SUPPORT if ( last_beacon != FGMkrBeacon::INNER ) { if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) { FGSimpleSound *sound = beacon.get_inner(); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "inner-marker" ); } if ( !globals->get_soundmgr()->is_playing("inner-marker") ) { globals->get_soundmgr()->play_looped( "inner-marker" ); } } #endif } else { // cout << "no marker" << endl; #ifdef ENABLE_AUDIO_SUPPORT globals->get_soundmgr()->stop( "outer-marker" ); globals->get_soundmgr()->stop( "middle-marker" ); globals->get_soundmgr()->stop( "inner-marker" ); #endif } last_beacon = beacon_type; //////////////////////////////////////////////////////////////////////// // ADF. //////////////////////////////////////////////////////////////////////// if ( current_navlist->query( lon, lat, elev, adf_freq, &nav ) ) { char freq[128]; #if defined( _MSC_VER ) || defined(__MINGW32__) _snprintf( freq, 10, "%.0f", adf_freq ); #else snprintf( freq, 10, "%.0f", adf_freq ); #endif adf_ident = freq; adf_ident += nav.get_ident(); // cout << "adf ident = " << adf_ident << endl; adf_valid = true; if ( last_adf_ident != adf_ident ) { last_adf_ident = adf_ident; adf_trans_ident = nav.get_trans_ident(); adf_lon = nav.get_lon(); adf_lat = nav.get_lat(); adf_elev = nav.get_elev(); adf_range = nav.get_range(); adf_effective_range = kludgeRange(adf_elev, elev, adf_range); adf_x = nav.get_x(); adf_y = nav.get_y(); adf_z = nav.get_z(); #ifdef ENABLE_AUDIO_SUPPORT if ( globals->get_soundmgr()->exists( "adf-ident" ) ) { globals->get_soundmgr()->remove( "adf-ident" ); } FGSimpleSound *sound; sound = morse.make_ident( adf_trans_ident, LO_FREQUENCY ); sound->set_volume( 0.3 ); globals->get_soundmgr()->add( sound, "adf-ident" ); int offset = (int)(sg_random() * 30.0); adf_play_count = offset / 4; adf_last_time = globals->get_time_params()->get_cur_time() - offset; // cout << "offset = " << offset << " play_count = " // << adf_play_count << " adf_last_time = " // << adf_last_time << " current time = " // << globals->get_time_params()->get_cur_time() << endl; #endif // cout << "Found an adf station in range" << endl; // cout << " id = " << nav.get_ident() << endl; } } else { adf_valid = false; adf_ident = ""; adf_trans_ident = ""; #ifdef ENABLE_AUDIO_SUPPORT globals->get_soundmgr()->remove( "adf-ident" ); #endif last_adf_ident = ""; // cout << "not picking up adf. :-(" << endl; } } // return the amount of heading needle deflection, returns a value // clamped to the range of ( -10 , 10 ) double FGRadioStack::get_nav1_heading_needle_deflection() const { double r; if ( nav1_inrange ) { r = nav1_heading - nav1_radial; // cout << "Radial = " << nav1_radial // << " Bearing = " << nav1_heading << endl; while ( r > 180.0 ) { r -= 360.0;} while ( r < -180.0 ) { r += 360.0;} if ( fabs(r) > 90.0 ) { r = ( r<0.0 ? -r-180.0 : -r+180.0 ); if ( nav1_loc ) { r = -r; } } // According to Robin Peel, the ILS is 4x more sensitive than a vor if ( nav1_loc ) { r *= 4.0; } if ( r < -10.0 ) { r = -10.0; } if ( r > 10.0 ) { r = 10.0; } } else { r = 0.0; } return r; } // return the amount of heading needle deflection, returns a value // clamped to the range of ( -10 , 10 ) double FGRadioStack::get_nav2_heading_needle_deflection() const { double r; if ( nav2_inrange ) { r = nav2_heading - nav2_radial; // cout << "Radial = " << nav2_radial // << " Bearing = " << nav2_heading << endl; while (r> 180.0) r-=360.0; while (r<-180.0) r+=360.0; if ( fabs(r) > 90.0 ) r = ( r<0.0 ? -r-180.0 : -r+180.0 ); // According to Robin Peel, the ILS is 4x more sensitive than a vor if ( nav2_loc ) r *= 4.0; if ( r < -10.0 ) r = -10.0; if ( r > 10.0 ) r = 10.0; } else { r = 0.0; } return r; } // return the amount of glide slope needle deflection (.i.e. the // number of degrees we are off the glide slope * 5.0 double FGRadioStack::get_nav1_gs_needle_deflection() const { if ( nav1_inrange && nav1_has_gs ) { double x = nav1_gs_dist; double y = (fgGetDouble("/position/altitude-ft") - nav1_elev) * SG_FEET_TO_METER; double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES; return (nav1_target_gs - angle) * 5.0; } else { return 0.0; } } // return the amount of glide slope needle deflection (.i.e. the // number of degrees we are off the glide slope * 5.0 double FGRadioStack::get_nav2_gs_needle_deflection() const { if ( nav2_inrange && nav2_has_gs ) { double x = nav2_gs_dist; double y = (fgGetDouble("/position/altitude-ft") - nav2_elev) * SG_FEET_TO_METER; double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES; return (nav2_target_gs - angle) * 5.0; } else { return 0.0; } } /** * Return true if the NAV1 TO flag should be active. */ bool FGRadioStack::get_nav1_to_flag () const { if (nav1_inrange) { double offset = fabs(nav1_heading - nav1_radial); if (nav1_loc) return true; else return (offset <= 90.0 || offset >= 270.0); } else { return false; } } /** * Return true if the NAV1 FROM flag should be active. */ bool FGRadioStack::get_nav1_from_flag () const { if (nav1_inrange) { double offset = fabs(nav1_heading - nav1_radial); if (nav1_loc) return false; else return (offset > 90.0 && offset < 270.0); } else { return false; } } /** * Return true if the NAV2 TO flag should be active. */ bool FGRadioStack::get_nav2_to_flag () const { if (nav2_inrange) { double offset = fabs(nav2_heading - nav2_radial); if (nav2_loc) return true; else return (offset <= 90.0 || offset >= 270.0); } else { return false; } } /** * Return true if the NAV2 FROM flag should be active. */ bool FGRadioStack::get_nav2_from_flag () const { if (nav2_inrange) { double offset = fabs(nav2_heading - nav2_radial); if (nav2_loc) return false; else return (offset > 90.0 && offset < 270.0); } else { return false; } }