kicad/pcbnew/router/pns_meander_placer_base.cpp

188 lines
4.9 KiB
C++

/*
* KiRouter - a push-and-(sometimes-)shove PCB router
*
* Copyright (C) 2013-2015 CERN
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pns_router.h"
#include "pns_meander.h"
#include "pns_meander_placer_base.h"
PNS_MEANDER_PLACER_BASE::PNS_MEANDER_PLACER_BASE( PNS_ROUTER* aRouter ) :
PNS_PLACEMENT_ALGO( aRouter )
{
m_currentWidth = 0;
}
PNS_MEANDER_PLACER_BASE::~PNS_MEANDER_PLACER_BASE()
{
}
void PNS_MEANDER_PLACER_BASE::AmplitudeStep( int aSign )
{
int a = m_settings.m_maxAmplitude + aSign * m_settings.m_step;
a = std::max( a, m_settings.m_minAmplitude );
m_settings.m_maxAmplitude = a;
}
void PNS_MEANDER_PLACER_BASE::SpacingStep( int aSign )
{
int s = m_settings.m_spacing + aSign * m_settings.m_step;
s = std::max( s, 2 * m_currentWidth );
m_settings.m_spacing = s;
}
void PNS_MEANDER_PLACER_BASE::UpdateSettings( const PNS_MEANDER_SETTINGS& aSettings )
{
m_settings = aSettings;
}
void PNS_MEANDER_PLACER_BASE::cutTunedLine( const SHAPE_LINE_CHAIN& aOrigin,
const VECTOR2I& aTuneStart,
const VECTOR2I& aCursorPos,
SHAPE_LINE_CHAIN& aPre,
SHAPE_LINE_CHAIN& aTuned,
SHAPE_LINE_CHAIN& aPost )
{
VECTOR2I cp ( aCursorPos );
if ( cp == aTuneStart ) // we don't like tuning segments with 0 length
{
int idx = aOrigin.FindSegment( cp );
if( idx >= 0 )
{
const SEG& s = aOrigin.CSegment( idx );
cp += (s.B - s.A).Resize(2);
} else
cp += VECTOR2I (2, 5); // some arbitrary value that is not 45 degrees oriented
}
VECTOR2I n = aOrigin.NearestPoint( cp );
VECTOR2I m = aOrigin.NearestPoint( aTuneStart );
SHAPE_LINE_CHAIN l( aOrigin );
l.Split( n );
l.Split( m );
int i_start = l.Find( m );
int i_end = l.Find( n );
if( i_start > i_end )
{
l = l.Reverse();
i_start = l.Find( m );
i_end = l.Find( n );
}
aPre = l.Slice( 0, i_start );
aPost = l.Slice( i_end, -1 );
aTuned = l.Slice( i_start, i_end );
aTuned.Simplify();
}
void PNS_MEANDER_PLACER_BASE::tuneLineLength( PNS_MEANDERED_LINE& aTuned, int aElongation )
{
int remaining = aElongation;
bool finished = false;
for( PNS_MEANDER_SHAPE* m : aTuned.Meanders() )
{
if( m->Type() != MT_CORNER )
{
if( remaining >= 0 )
remaining -= m->MaxTunableLength() - m->BaselineLength();
if( remaining < 0 )
{
if( !finished )
{
PNS_MEANDER_TYPE newType;
if( m->Type() == MT_START || m->Type() == MT_SINGLE )
newType = MT_SINGLE;
else
newType = MT_FINISH;
m->SetType( newType );
m->Recalculate();
finished = true;
} else {
m->MakeEmpty();
}
}
}
}
remaining = aElongation;
int meanderCount = 0;
for(PNS_MEANDER_SHAPE* m : aTuned.Meanders())
{
if( m->Type() != MT_CORNER && m->Type() != MT_EMPTY )
{
if(remaining >= 0)
{
remaining -= m->MaxTunableLength() - m->BaselineLength();
meanderCount ++;
}
}
}
int balance = 0;
if( meanderCount )
balance = -remaining / meanderCount;
if( balance >= 0 )
{
for( PNS_MEANDER_SHAPE* m : aTuned.Meanders() )
{
if( m->Type() != MT_CORNER && m->Type() != MT_EMPTY )
{
m->Resize( std::max( m->Amplitude() - balance / 2, m_settings.m_minAmplitude ) );
}
}
}
}
const PNS_MEANDER_SETTINGS& PNS_MEANDER_PLACER_BASE::MeanderSettings() const
{
return m_settings;
}
int PNS_MEANDER_PLACER_BASE::compareWithTolerance( int aValue, int aExpected, int aTolerance ) const
{
if( aValue < aExpected - aTolerance )
return -1;
else if( aValue > aExpected + aTolerance )
return 1;
else
return 0;
}