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router: somewhat improved stop-if-walk-path-is-too-long heuristic in the walkaround algorithm

This commit is contained in:
Tomasz Wlostowski 2022-08-18 22:44:28 +02:00 committed by Seth Hillbrand
parent 42dae1504a
commit e593e0b014
1 changed files with 22 additions and 3 deletions
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25
pcbnew/router/pns_walkaround.cpp
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@ -135,7 +135,7 @@ const WALKAROUND::RESULT WALKAROUND::Route( const LINE& aInitialPath )
// iteration limit causes lag, so we can exit out early if the walkaround path gets very long
// compared with the initial path. If the length exceeds the initial length times this factor,
// fail out.
const int maxWalkDistFactor = 10;
const int maxWalkDistFactor = 3;
long long lengthLimit = aInitialPath.CLine().Length() * maxWalkDistFactor;
while( m_iteration < m_iterationLimit )
@ -161,9 +161,28 @@ const WALKAROUND::RESULT WALKAROUND::Route( const LINE& aInitialPath )
if( s_cw != IN_PROGRESS && s_ccw != IN_PROGRESS )
break;
// Safety valve
if( path_cw.Line().Length() > lengthLimit && path_ccw.Line().Length() > lengthLimit )
double lcw = path_cw.Line().Length() / (double)aInitialPath.CLine().Length();
double lccw = path_ccw.Line().Length() / (double)aInitialPath.CLine().Length();
bool cwLimitHit = path_cw.Line().Length() > lengthLimit;
bool ccwLimitHit = path_ccw.Line().Length() > lengthLimit;
bool bothInProgress = s_ccw == IN_PROGRESS && s_cw == IN_PROGRESS;
// Safety valve, somewhat refined. If both walkaround paths get too long,
// just stop, otherwise consider only the threshold for the path still being 'in progress'.
if( bothInProgress )
{
if( cwLimitHit && ccwLimitHit )
break;
}
else
{
if( s_cw == IN_PROGRESS && cwLimitHit )
break;
if( s_ccw == IN_PROGRESS && ccwLimitHit )
break;
}
m_iteration++;
}