Threshold lights.
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1 changed files with 150 additions and 1 deletions
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@ -252,6 +252,143 @@ static superpoly_list gen_runway_edge_lights( const FGRunway& rwy_info,
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}
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// generate threshold lights for a 3 degree approach
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static superpoly_list gen_runway_threshold_lights( const FGRunway& rwy_info,
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const string& kind,
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float alt_m, bool recip )
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{
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point_list g_lights; g_lights.clear();
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point_list g_normals; g_normals.clear();
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point_list r_lights; r_lights.clear();
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point_list r_normals; r_normals.clear();
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int i;
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cout << "gen threshold " << rwy_info.rwy_no << endl;
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Point3D normal;
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// using FGPolygon is a bit innefficient, but that's what the
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// routine returns.
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FGPolygon poly_corners = gen_runway_area_w_expand( rwy_info, 0.0, 0.0 );
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point_list corner;
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for ( i = 0; i < poly_corners.contour_size( 0 ); ++i ) {
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corner.push_back( poly_corners.get_pt( 0, i ) );
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}
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// determine the start point.
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Point3D ref1, ref2, ref3, ref4;
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double length_hdg, left_hdg;
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double lon, lat, r;
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if ( recip ) {
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ref1 = corner[0];
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ref2 = corner[1];
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ref3 = corner[3];
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ref4 = corner[2];
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length_hdg = rwy_info.heading + 180.0;
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if ( length_hdg > 360.0 ) { length_hdg -= 360.0; }
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} else {
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ref1 = corner[2];
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ref2 = corner[3];
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ref3 = corner[1];
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ref4 = corner[0];
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length_hdg = rwy_info.heading;
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}
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left_hdg = length_hdg - 90.0;
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if ( left_hdg < 0 ) { left_hdg += 360.0; }
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cout << "length hdg = " << length_hdg
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<< " left heading = " << left_hdg << endl;
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normal = gen_runway_light_vector( rwy_info, 3.0, recip );
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// offset 5' downwind
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geo_direct_wgs_84 ( alt_m, ref1.lat(), ref1.lon(), length_hdg,
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-5 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref1 = Point3D( lon, lat, 0.0 );
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geo_direct_wgs_84 ( alt_m, ref2.lat(), ref2.lon(), length_hdg,
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-5 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref2 = Point3D( lon, lat, 0.0 );
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// offset 5' upwind
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geo_direct_wgs_84 ( alt_m, ref3.lat(), ref3.lon(), length_hdg,
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-5 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref3 = Point3D( lon, lat, 0.0 );
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geo_direct_wgs_84 ( alt_m, ref4.lat(), ref4.lon(), length_hdg,
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-5 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref4 = Point3D( lon, lat, 0.0 );
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// five lights each
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for ( int i = 0; i < 5; ++i ) {
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g_lights.push_back( ref1 );
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g_normals.push_back( normal );
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g_lights.push_back( ref2 );
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g_normals.push_back( normal );
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r_lights.push_back( ref3 );
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r_normals.push_back( normal );
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r_lights.push_back( ref4 );
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r_normals.push_back( normal );
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// offset 10' towards center
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geo_direct_wgs_84 ( alt_m, ref1.lat(), ref1.lon(), left_hdg,
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-10 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref1 = Point3D( lon, lat, 0.0 );
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geo_direct_wgs_84 ( alt_m, ref2.lat(), ref2.lon(), left_hdg,
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10 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref2 = Point3D( lon, lat, 0.0 );
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geo_direct_wgs_84 ( alt_m, ref3.lat(), ref3.lon(), left_hdg,
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-10 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref3 = Point3D( lon, lat, 0.0 );
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geo_direct_wgs_84 ( alt_m, ref4.lat(), ref4.lon(), left_hdg,
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10 * SG_FEET_TO_METER, &lat, &lon, &r );
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ref4 = Point3D( lon, lat, 0.0 );
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}
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FGPolygon lights_poly; lights_poly.erase();
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FGPolygon normals_poly; normals_poly.erase();
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lights_poly.add_contour( g_lights, false );
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normals_poly.add_contour( g_normals, false );
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FGSuperPoly green;
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green.set_poly( lights_poly );
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green.set_normals( normals_poly );
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green.set_material( "RWY_GREEN_LIGHTS" );
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if ( kind == "H" ) {
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green.set_material( "RWY_GREEN_LIGHTS" );
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} else if ( kind == "M" ) {
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green.set_material( "RWY_GREEN_MEDIUM_LIGHTS" );
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} else if ( kind == "L" ) {
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green.set_material( "RWY_GREEN_LOW_LIGHTS" );
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}
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lights_poly.erase();
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normals_poly.erase();
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lights_poly.add_contour( r_lights, false );
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normals_poly.add_contour( r_normals, false );
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FGSuperPoly red;
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red.set_poly( lights_poly );
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red.set_normals( normals_poly );
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if ( kind == "H" ) {
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red.set_material( "RWY_RED_LIGHTS" );
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} else if ( kind == "M" ) {
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red.set_material( "RWY_RED_MEDIUM_LIGHTS" );
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} else if ( kind == "L" ) {
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red.set_material( "RWY_RED_LOW_LIGHTS" );
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}
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superpoly_list result; result.clear();
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result.push_back( green );
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result.push_back( red );
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return result;
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}
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// generate runway center line lighting, 50' spacing.
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static superpoly_list gen_runway_center_line_lights( const FGRunway& rwy_info,
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bool recip )
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@ -766,7 +903,7 @@ void gen_runway_lights( const FGRunway& rwy_info, float alt_m,
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unsigned int i;
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// Make edge lighting
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// Make edge and threshold lighting
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string edge_type = rwy_info.surface_flags.substr(3,1);
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if ( edge_type != (string)"N" ) {
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// forward direction
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@ -781,6 +918,18 @@ void gen_runway_lights( const FGRunway& rwy_info, float alt_m,
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for ( i = 0; i < s.size(); ++i ) {
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lights.push_back( s[i] );
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}
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// forward direction
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s = gen_runway_threshold_lights( rwy_info, edge_type, alt_m, false );
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for ( i = 0; i < s.size(); ++i ) {
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lights.push_back( s[i] );
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}
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// reverse direction
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s = gen_runway_threshold_lights( rwy_info, edge_type, alt_m, true );
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for ( i = 0; i < s.size(); ++i ) {
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lights.push_back( s[i] );
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}
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}
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// Centerline lighting
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