pns_via.cpp

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/*
 * KiRouter - a push-and-(sometimes-)shove PCB router
 *
 * Copyright (C) 2013-2014 CERN
 * Copyright (C) 2016-2020 KiCad Developers, see AUTHORS.txt for contributors.
 * Author: Tomasz Wlostowski <[email protected]>
 *
 * 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_via.h"
#include "pns_node.h"
#include "pns_utils.h"
#include "pns_router.h"

#include <geometry/shape_rect.h>
#include <math/box2.h>

namespace PNS {

bool VIA::PushoutForce( NODE* aNode, const VECTOR2I& aDirection, VECTOR2I& aForce,
 bool aSolidsOnly, int aMaxIterations )
{
 int iter = 0;
 VIA mv( *this );
 VECTOR2I force, totalForce;

 while( iter < aMaxIterations )
 {
 NODE::OPT_OBSTACLE obs = aNode->CheckColliding( &mv, aSolidsOnly ? ITEM::SOLID_T
 : ITEM::ANY_T );

 if( !obs )
 break;

 int clearance = aNode->GetClearance( obs->m_item, &mv );

 if( iter > aMaxIterations / 2 )
 {
 VECTOR2I l = aDirection.Resize( m_diameter / 2 );
 totalForce += l;
 mv.SetPos( mv.Pos() + l );
 }

 if( obs->m_item->Shape()->Collide( mv.Shape(), clearance, &force ) )
 {
 totalForce += force;
 mv.SetPos( mv.Pos() + force );
 }

 iter++;
 }

 if( iter == aMaxIterations )
 return false;

 aForce = totalForce;

 return true;
}


const SHAPE_LINE_CHAIN VIA::Hull( int aClearance, int aWalkaroundThickness, int aLayer ) const
{
 int cl = ( aClearance + aWalkaroundThickness / 2 );
 int width = m_diameter;

 if( !ROUTER::GetInstance()->GetInterface()->IsFlashedOnLayer( this, aLayer ) )
 width = m_drill;

 // Chamfer = width * ( 1 - sqrt(2)/2 ) for equilateral octagon
 return OctagonalHull( m_pos - VECTOR2I( width / 2, width / 2 ),
 VECTOR2I( width, width ),
 cl + 1, ( 2 * cl + width ) * ( 1.0 - M_SQRT1_2 ) );
}


VIA* VIA::Clone() const
{
 VIA* v = new VIA();

 v->SetNet( Net() );
 v->SetLayers( Layers() );
 v->m_pos = m_pos;
 v->m_diameter = m_diameter;
 v->m_drill = m_drill;
 v->m_shape = SHAPE_CIRCLE( m_pos, m_diameter / 2 );
 v->m_hole = SHAPE_CIRCLE( m_pos, m_drill / 2 );
 v->m_rank = m_rank;
 v->m_marker = m_marker;
 v->m_viaType = m_viaType;
 v->m_parent = m_parent;
 v->m_isFree = m_isFree;
 v->m_isVirtual = m_isVirtual;

 return v;
}


OPT_BOX2I VIA::ChangedArea( const VIA* aOther ) const
{
 if ( aOther->Pos() != Pos() )
 {
 BOX2I tmp = Shape()->BBox();
 tmp.Merge( aOther->Shape()->BBox() );
 return tmp;
 }

 return OPT_BOX2I();
}

const VIA_HANDLE VIA::MakeHandle() const
{
 VIA_HANDLE h;
 h.pos = Pos();
 h.layers = Layers();
 h.net = Net();
 h.valid = true;
 return h;
}

}