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Try an idea that is hopefully slightly more intelligent about what land

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cover area to assign a "default cover" triangle to.
This commit is contained in:
curt 2003-08-19 02:51:08 +00:00
parent 4ff5acb28c
commit 5943155bad
1 changed files with 32 additions and 10 deletions
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36
src/BuildTiles/Main/main.cxx
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@ -618,17 +618,39 @@ static void fix_land_cover_assignments( TGConstruct& c ) {
for ( unsigned int i = 0; i < tri_elements.size(); ++i ) {
TGTriEle t = tri_elements[i];
if ( t.get_attribute() == DefaultArea ) {
Point3D average = ( geod_nodes[t.get_n1()]
+ geod_nodes[t.get_n2()]
+ geod_nodes[t.get_n3()] ) / 3.0;
Point3D p1 = geod_nodes[t.get_n1()];
Point3D p2 = geod_nodes[t.get_n2()];
Point3D p3 = geod_nodes[t.get_n3()];
AreaType a1 = get_area_type ( c.get_cover(), p1.x(), p1.y(),
1.0 / 120.0, 1.0 / 120.0 );
AreaType a2 = get_area_type ( c.get_cover(), p2.x(), p2.y(),
1.0 / 120.0, 1.0 / 120.0 );
AreaType a3 = get_area_type ( c.get_cover(), p3.x(), p3.y(),
1.0 / 120.0, 1.0 / 120.0 );
// update the original triangle element attribute
AreaType new_area;
// majority rules
if ( a1 == a2 ) {
new_area = a1;
} else if ( a1 == a3 ) {
new_area = a1;
} else if ( a2 == a3 ) {
new_area = a2;
} else {
// a different coverage for each vertex, just pick
// from the middle/average
Point3D average = ( p1 + p2 + p3 ) / 3.0;
cout << " average triangle center = " << average;
AreaType a = get_area_type ( c.get_cover(),
new_area = get_area_type ( c.get_cover(),
average.x(), average.y(),
1.0 / 120.0, 1.0 / 120.0 );
cout << " new attrib = " << get_area_name( a ) << endl;
}
// update the actual structure
c.set_tri_attribute( i, a );
cout << " new attrib = " << get_area_name( new_area ) << endl;
c.set_tri_attribute( i, new_area );
}
}
}