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DP tolerance needs to be 1IU on each axis 

ApproximatelyParallel will only check for parallel within 1 IU, so a 1x1
SEG will always be parallel and the projection is invalid

(cherry picked from commit d0796399a2)
This commit is contained in:
Seth Hillbrand 2022-04-11 16:55:54 -07:00
parent f88e0481c8
commit 819276bd98
1 changed files with 3 additions and 3 deletions
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6
pcbnew/drc/drc_test_provider_diff_pair_coupling.cpp
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@ -202,9 +202,9 @@ static void extractDiffPairCoupledItems( DIFF_PAIR_ITEMS& aDp, DRC_RTREE& aTree
SEG ssp ( sp->GetStart(), sp->GetEnd() );
SEG ssn ( sn->GetStart(), sn->GetEnd() );
// Segments that are == 1 IU in length are approximately parallel with everything and their
// parallel projection is < 1 IU, leading to bad distance calculations
if( ssp.SquaredLength() > 1 && ssn.SquaredLength() > 1 && ssp.ApproxParallel(ssn) )
// Segments that are ~ 1 IU in length per side are approximately parallel (tolerance is 1 IU)
// with everything and their parallel projection is < 1 IU, leading to bad distance calculations
if( ssp.SquaredLength() > 2 && ssn.SquaredLength() > 2 && ssp.ApproxParallel(ssn) )
{
DIFF_PAIR_COUPLED_SEGMENTS cpair;
bool coupled = commonParallelProjection( ssp, ssn, cpair.coupledP, cpair.coupledN );