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Added code to chop up extra long line segments.

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curt 2000-08-22 22:06:47 +00:00
parent e6f361eb80
commit d70c4eca1c
1 changed files with 82 additions and 3 deletions
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85
src/Airports/GenAirports/build.cxx
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@ -365,6 +365,79 @@ static FGPolygon remove_dups( const FGPolygon &poly ) {
}
// Traverse a polygon and split edges until they are less than max_len
// (specified in meters)
static FGPolygon split_long_edges( const FGPolygon &poly, double max_len ) {
FGPolygon result;
Point3D p0, p1;
cout << "split_long_edges()" << endl;
for ( int i = 0; i < poly.contours(); ++i ) {
// cout << "contour = " << i << endl;
for ( int j = 0; j < poly.contour_size(i) - 1; ++j ) {
p0 = poly.get_pt( i, j );
p1 = poly.get_pt( i, j + 1 );
double az1, az2, s;
geo_inverse_wgs_84( 0.0,
p0.y(), p0.x(), p1.y(), p1.x(),
&az1, &az2, &s );
cout << "distance = " << s << endl;
if ( s > max_len ) {
int segments = (int)(s / max_len) + 1;
cout << "segments = " << segments << endl;
double dx = (p1.x() - p0.x()) / segments;
double dy = (p1.y() - p0.y()) / segments;
for ( int k = 0; k < segments; ++k ) {
Point3D tmp( p0.x() + dx * k, p0.y() + dy * k, 0.0 );
cout << tmp << endl;
result.add_node( i, tmp );
}
} else {
cout << p0 << endl;
result.add_node( i, p0 );
}
// end of segment is beginning of next segment
}
p0 = poly.get_pt( i, poly.contour_size(i) - 1 );
p1 = poly.get_pt( i, 0 );
double az1, az2, s;
geo_inverse_wgs_84( 0.0,
p0.y(), p0.x(), p1.y(), p1.x(),
&az1, &az2, &s );
cout << "distance = " << s << endl;
if ( s > max_len ) {
int segments = (int)(s / max_len) + 1;
cout << "segments = " << segments << endl;
double dx = (p1.x() - p0.x()) / segments;
double dy = (p1.y() - p0.y()) / segments;
for ( int k = 0; k < segments; ++k ) {
Point3D tmp( p0.x() + dx * k, p0.y() + dy * k, 0.0 );
cout << tmp << endl;
result.add_node( i, tmp );
}
} else {
cout << p0 << endl;
result.add_node( i, p0 );
}
// maintain original hole flag setting
result.set_hole_flag( i, poly.get_hole_flag( i ) );
}
return result;
}
// remove any degenerate contours
static FGPolygon remove_bad_contours( const FGPolygon &poly ) {
FGPolygon result;
@ -569,8 +642,7 @@ void build_airport( string airport_raw, string_list& runways_raw,
string surface_flag;
string material;
for ( int i = 0; i < (int)runways.size(); ++i ) {
runway = gen_runway_w_mid( runways[i] );
surface_flag = runways[i].surface_flags.substr(0, 1);
surface_flag = runways[i].surface_flags.substr(1, 1);
cout << "surface flag = " << surface_flag << endl;
if ( surface_flag == "A" ) {
material = "Asphalt";
@ -580,8 +652,13 @@ void build_airport( string airport_raw, string_list& runways_raw,
material = "DryLake";
} else if ( surface_flag == "T" ) {
material = "Grass";
} else {
cout << "unknown runway type!" << endl;
exit(-1);
}
runway = gen_runway_w_mid( runways[i] );
// runway half "a"
runway_a.erase();
runway_a.add_node( 0, runway.get_pt(0, 0) );
@ -667,7 +744,8 @@ void build_airport( string airport_raw, string_list& runways_raw,
// generate convex hull
FGPolygon hull = convex_hull(apt_pts);
FGPolygon base_poly = polygon_diff( hull, accum );
FGPolygon divided_hull = split_long_edges( hull, 500.0 );
FGPolygon base_poly = polygon_diff( divided_hull, accum );
// write_polygon( base_poly, "base-raw" );
// add segments to polygons to remove any possible "T"
@ -820,6 +898,7 @@ void build_airport( string airport_raw, string_list& runways_raw,
FGPolygon tri_poly = rwy_polys[k].get_tris();
FGPolygon tri_txs = rwy_polys[k].get_texcoords();
string material = rwy_polys[k].get_material();
cout << "material = " << material << endl;
for ( int i = 0; i < tri_poly.contours(); ++i ) {
tri_v.clear();
tri_tc.clear();