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Code Issues 156 Wiki Activity

feat(track): at a crossing at a wide angle every head of one track meets every head of the other in a mitre from the corner of their flangeways to the far corner of the heads, the way the corners of a cast diamond look, so the running rails and guard rails of both tracks form closed corners and only the flangeways stay open, instead of the rails of one track going through and the other ones glued to their sides; corner_cut gives the mitres, as bends of the running rails and as miters of the guard rails; the fit of a loft end to the profile of another rail and the field and gauge outlines of the rail profile are gone with the gluing

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maj00r
2026-10-14 11:08:02 +02:00
parent 4016c4ce04
commit f03c6b8ebc
6 changed files with 31 additions and 92 deletions
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30
world/RailProfile.cpp
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@@ -33,36 +33,6 @@ rail_size measure_rail( gfx::vertex_array const &Profile ) {
}
result.height = top - bottom;
result.crest = top;
std::size_t firsttop { count };
std::size_t lasttop { 0 };
for( std::size_t i = 0; i < count; ++i ) {
if( Profile[ i ].position.y > top - 1e-4 ) {
firsttop = std::min( firsttop, i );
lasttop = std::max( lasttop, i );
}
}
knots::line sides[ 2 ];
for( std::size_t i = 0; i < count; ++i ) {
auto const &point { Profile[ i ].position };
if( i <= firsttop ) {
sides[ 0 ].emplace_back( point.y, point.x );
}
if( i >= lasttop ) {
sides[ 1 ].emplace_back( point.y, point.x );
}
}
for( auto &side : sides ) {
knots::sort( side );
}
auto const mean = []( knots::line const &Side ) {
auto sum { 0.0 };
for( auto const &knot : Side ) {
sum += knot.y;
}
return sum / std::max<std::size_t>( Side.size(), 1 ); };
auto const fieldfirst { mean( sides[ 0 ] ) > mean( sides[ 1 ] ) };
result.field = sides[ fieldfirst ? 0 : 1 ];
result.gauge = sides[ fieldfirst ? 1 : 0 ];
auto const middle { top - 0.5 * result.height };
auto webfrom { 1e9 };
auto webto { -1e9 };