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Performance SCH_EDIT_FRAME::SchematicCleanUp 

Avoid O(N^2) comparisonis by spatial presorting. If bounding boxes don't
overlap there's no need to run expensive checks.
This commit is contained in:
Yon Uriarte 2024-02-12 08:39:11 +01:00 committed by Wayne Stambaugh
parent 5900f6baa4
commit f3c2083018
1 changed files with 42 additions and 0 deletions
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42
eeschema/bus-wire-junction.cpp
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@ -186,6 +186,28 @@ void SCH_EDIT_FRAME::SchematicCleanUp( SCH_COMMIT* aCommit, SCH_SCREEN* aScreen
} );
auto minX = []( const SCH_LINE* l )
{
return std::min( l->GetStartPoint().x, l->GetEndPoint().x );
};
auto maxX = []( const SCH_LINE* l )
{
return std::max( l->GetStartPoint().x, l->GetEndPoint().x );
};
auto minY = []( const SCH_LINE* l )
{
return std::min( l->GetStartPoint().y, l->GetEndPoint().y );
};
auto maxY = []( const SCH_LINE* l )
{
return std::max( l->GetStartPoint().y, l->GetEndPoint().y );
};
// Would be nice to put lines in a canonical form here by swapping
// start <-> end as needed but I don't know what swapping breaks.
while( changed )
{
changed = false;
@ -197,6 +219,13 @@ void SCH_EDIT_FRAME::SchematicCleanUp( SCH_COMMIT* aCommit, SCH_SCREEN* aScreen
lines.push_back( static_cast<SCH_LINE*>( item ) );
}
// Sort by minimum X position
std::sort( lines.begin(), lines.end(),
[&]( const SCH_LINE* a, const SCH_LINE* b )
{
return minX( a ) < minX( b );
} );
for( auto it1 = lines.begin(); it1 != lines.end(); ++it1 )
{
SCH_LINE* firstLine = *it1;
@ -210,11 +239,24 @@ void SCH_EDIT_FRAME::SchematicCleanUp( SCH_COMMIT* aCommit, SCH_SCREEN* aScreen
continue;
}
int firstRightXEdge = maxX( firstLine );
auto it2 = it1;
for( ++it2; it2 != lines.end(); ++it2 )
{
SCH_LINE* secondLine = *it2;
int secondLeftXEdge = minX( secondLine );
// impossible to overlap remaining lines
if( secondLeftXEdge > firstRightXEdge )
break;
// No Y axis overlap
if( !( std::max( minY( firstLine ), minY( secondLine ) )
<= std::min( maxY( firstLine ), maxY( secondLine ) ) ) )
{
continue;
}
if( secondLine->GetFlags() & STRUCT_DELETED )
continue;