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The resulting airport surfaces still had too much undulation from the noise

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in the DEM data.  Coarsen the nurbs grid and average some surrounding data
to hide the noise.
This commit is contained in:
curt 2003-03-09 19:19:19 +00:00
parent 846473a424
commit c986802faa
1 changed files with 16 additions and 14 deletions
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30
src/Airports/GenAirports/apt_surface.cxx
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@ -150,20 +150,20 @@ TGAptSurface::TGAptSurface( const string& path,
cout << "Area size = " << x_m << " x " << y_m << " (m)" << endl;
int xdivs = (int)(x_m / 400.0) + 1;
int ydivs = (int)(y_m / 400.0) + 1;
int xdivs = (int)(x_m / 800.0) + 1;
int ydivs = (int)(y_m / 800.0) + 1;
cout << " M(" << xdivs << "," << ydivs << ")" << endl;
double dlon = x_deg / xdivs;
double dlat = y_deg / ydivs;
// Build the double res input grid
Matrix_Point3Df dPts(xdivs*2 + 2, ydivs*2 + 2);
for ( int i = 0; i <= xdivs*2; ++i ) {
for ( int j = 0; j <= ydivs*2; ++j ) {
dPts(i,j) = Point3Df( min_deg.lon() + i * (dlon*0.5),
min_deg.lat() + j * (dlat*0.5),
int mult = 4;
Matrix_Point3Df dPts((xdivs+1) * mult, (ydivs + 1) * mult);
for ( int i = 0; i < dPts.rows(); ++i ) {
for ( int j = 0; j < dPts.cols(); ++j ) {
dPts(i,j) = Point3Df( min_deg.lon() + i * (dlon/(double)mult),
min_deg.lat() + j * (dlat/(double)mult),
-9999 );
}
}
@ -171,18 +171,20 @@ TGAptSurface::TGAptSurface( const string& path,
// Determine elevation of the grid points
calc_elevations( path, dPts );
// Build the norma res input grid from the double res version
// Build the normal res input grid from the double res version
Matrix_Point3Df Pts(xdivs + 1, ydivs + 1);
for ( int i = 0; i <= xdivs; ++i ) {
for ( int j = 0; j <= ydivs; ++j ) {
cout << i << "," << j << endl;
double z1 = dPts(2*i,2*j).z();
double z2 = dPts(2*i+1,2*j).z();
double z3 = dPts(2*i,2*j+1).z();
double z4 = dPts(i*2+1,2*j+1).z();
double accum = 0.0;
for ( int ii = 0; ii < mult; ++ii ) {
for ( int jj = 0; jj < mult; ++jj ) {
accum += dPts(mult * i + ii, mult * j + jj).z();
}
}
Pts(i,j) = Point3Df( min_deg.lon() + i * dlon,
min_deg.lat() + j * dlat,
(z1+z2+z3+z4) / 4.0 );
accum / (mult*mult) );
}
}