const PNS_DIFF_PAIR PNS_DP_GATEWAY::Entry() const
{
return PNS_DIFF_PAIR( m_entryP, m_entryN, 0 );
}
bool PNS_TOPOLOGY::AssembleDiffPair( PNS_ITEM* aStart, PNS_DIFF_PAIR& aPair )
{
int refNet = aStart->Net();
int coupledNet = DpCoupledNet( refNet );
if( coupledNet < 0 )
return false;
std::set<PNS_ITEM*> coupledItems;
m_world->AllItemsInNet( coupledNet, coupledItems );
PNS_SEGMENT* coupledSeg = NULL, *refSeg;
int minDist = std::numeric_limits<int>::max();
if( ( refSeg = dyn_cast<PNS_SEGMENT*>( aStart ) ) != NULL )
{
for( PNS_ITEM* item : coupledItems )
{
if( PNS_SEGMENT* s = dyn_cast<PNS_SEGMENT*>( item ) )
{
if( s->Layers().Start() == refSeg->Layers().Start() && s->Width() == refSeg->Width() )
{
int dist = s->Seg().Distance( refSeg->Seg() );
bool isParallel = refSeg->Seg().ApproxParallel( s->Seg() );
SEG p_clip, n_clip;
bool isCoupled = commonParallelProjection( refSeg->Seg(), s->Seg(), p_clip, n_clip );
if( isParallel && isCoupled && dist < minDist )
{
minDist = dist;
coupledSeg = s;
}
}
}
}
}
else
{
return false;
}
if( !coupledSeg )
return false;
PNS_LINE lp = m_world->AssembleLine( refSeg );
PNS_LINE ln = m_world->AssembleLine( coupledSeg );
if( DpNetPolarity( refNet ) < 0 )
{
std::swap( lp, ln );
}
int gap = -1;
if( refSeg->Seg().ApproxParallel( coupledSeg->Seg() ) )
{
// Segments are parallel -> compute pair gap
const VECTOR2I refDir = refSeg->Anchor( 1 ) - refSeg->Anchor( 0 );
const VECTOR2I displacement = refSeg->Anchor( 1 ) - coupledSeg->Anchor( 1 );
gap = (int) std::abs( refDir.Cross( displacement ) / refDir.EuclideanNorm() ) - lp.Width();
}
aPair = PNS_DIFF_PAIR( lp, ln );
aPair.SetWidth( lp.Width() );
aPair.SetLayers( lp.Layers() );
aPair.SetGap( gap );
return true;
}
bool PNS_DIFF_PAIR_PLACER::routeHead( const VECTOR2I& aP )
{
m_fitOk = false;
PNS_DP_GATEWAYS gwsEntry( gap() );
PNS_DP_GATEWAYS gwsTarget( gap() );
if( !m_prevPair )
m_prevPair = m_start;
gwsEntry.BuildFromPrimitivePair( *m_prevPair, m_startDiagonal );
PNS_DP_PRIMITIVE_PAIR target;
if( findDpPrimitivePair( aP, m_currentEndItem, target ) )
{
gwsTarget.BuildFromPrimitivePair( target, m_startDiagonal );
m_snapOnTarget = true;
}
else
{
VECTOR2I fp;
if( !propagateDpHeadForces( aP, fp ) )
return false;
VECTOR2I midp, dirV;
m_prevPair->CursorOrientation( fp, midp, dirV );
VECTOR2I fpProj = SEG( midp, midp + dirV ).LineProject( fp );
int lead_dist = ( fpProj - fp ).EuclideanNorm();
gwsTarget.SetFitVias( m_placingVia, m_sizes.ViaDiameter(), viaGap() );
if( lead_dist > m_sizes.DiffPairGap() + m_sizes.DiffPairWidth() )
{
gwsTarget.BuildForCursor( fp );
}
else
{
gwsTarget.BuildForCursor( fpProj );
gwsTarget.FilterByOrientation( DIRECTION_45::ANG_STRAIGHT | DIRECTION_45::ANG_HALF_FULL, DIRECTION_45( dirV ) );
}
m_snapOnTarget = false;
}
m_currentTrace = PNS_DIFF_PAIR();
m_currentTrace.SetGap( gap() );
m_currentTrace.SetLayer( m_currentLayer );
bool result = gwsEntry.FitGateways( gwsEntry, gwsTarget, m_startDiagonal, m_currentTrace );
if( result )
{
m_currentTrace.SetNets( m_netP, m_netN );
m_currentTrace.SetWidth( m_sizes.DiffPairWidth() );
m_currentTrace.SetGap( m_sizes.DiffPairGap() );
if( m_placingVia )
{
m_currentTrace.AppendVias ( makeVia( m_currentTrace.CP().CPoint( -1 ), m_netP ),
makeVia( m_currentTrace.CN().CPoint( -1 ), m_netN ) );
}
return true;
}
return false;
}
