kicad/pcbnew/router/pns_line.h

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/*
* KiRouter - a push-and-(sometimes-)shove PCB router
*
* Copyright (C) 2013-2017 CERN
* Copyright (C) 2016-2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
* 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.
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*
* 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.
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*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __PNS_LINE_H
#define __PNS_LINE_H
#include <math/box2.h>
#include <math/vector2d.h>
#include <geometry/direction45.h>
#include <geometry/seg.h>
#include <geometry/shape.h>
#include <geometry/shape_line_chain.h>
#include "pns_item.h"
#include "pns_via.h"
#include "pns_link_holder.h"
namespace PNS {
class LINKED_ITEM;
class NODE;
class VIA;
#define PNS_HULL_MARGIN 10
/**
* Represents a track on a PCB, connecting two non-trivial joints (that is,
* vias, pads, junctions between multiple traces or two traces different widths
* and combinations of these). PNS_LINEs are NOT stored in the model (NODE).
* Instead, they are assembled on-the-fly, based on a via/pad/segment that
* belongs to/starts/ends them.
*
* PNS_LINEs can be either loose (consisting of segments that do not belong to
* any NODE) or owned (with segments taken from a NODE) - these are returned by
* #NODE::AssembleLine and friends.
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*
* A LINE may have a VIA attached at its end (i.e. the last point) - this is used by via
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* dragging/force propagation stuff.
*/
class LINE : public LINK_HOLDER
{
public:
/**
* Makes an empty line.
*/
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LINE() :
LINK_HOLDER( LINE_T ),
m_blockingObstacle( nullptr )
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{
m_hasVia = false;
m_width = 1; // Dummy value
m_snapThreshhold = 0;
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}
LINE( const LINE& aOther );
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/**
* Copy properties (net, layers, etc.) from a base line and replaces the shape by another.
*/
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LINE( const LINE& aBase, const SHAPE_LINE_CHAIN& aLine ) :
LINK_HOLDER( aBase ),
m_line( aLine ),
m_width( aBase.m_width ),
m_snapThreshhold( aBase.m_snapThreshhold ),
m_blockingObstacle( nullptr )
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{
m_net = aBase.m_net;
m_layers = aBase.m_layers;
m_hasVia = false;
}
/**
* Construct a LINE for a lone VIA (ie a stitching via).
*/
LINE( const VIA& aVia ) :
LINK_HOLDER( LINE_T ),
m_blockingObstacle( nullptr )
{
m_hasVia = true;
m_via = aVia;
m_width = aVia.Diameter();
m_net = aVia.Net();
m_layers = aVia.Layers();
m_rank = aVia.Rank();
m_snapThreshhold = 0;
}
~LINE();
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static inline bool ClassOf( const ITEM* aItem )
{
return aItem && LINE_T == aItem->Kind();
}
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/// @copydoc ITEM::Clone()
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virtual LINE* Clone() const override;
LINE& operator=( const LINE& aOther );
bool IsLinkedChecked() const
{
return IsLinked() && LinkCount() == SegmentCount();
}
///< Assign a shape to the line (a polyline/line chain).
void SetShape( const SHAPE_LINE_CHAIN& aLine )
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{
m_line = aLine;
m_line.SetWidth( m_width );
}
///< Return the shape of the line.
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const SHAPE* Shape() const override { return &m_line; }
///< Modifiable accessor to the underlying shape.
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SHAPE_LINE_CHAIN& Line() { return m_line; }
const SHAPE_LINE_CHAIN& CLine() const { return m_line; }
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int SegmentCount() const { return m_line.SegmentCount(); }
int PointCount() const { return m_line.PointCount(); }
int ArcCount() const { return m_line.ArcCount(); }
int ShapeCount() const { return m_line.ShapeCount(); }
///< Return the \a aIdx-th point of the line.
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const VECTOR2I& CPoint( int aIdx ) const { return m_line.CPoint( aIdx ); }
const SEG CSegment( int aIdx ) const { return m_line.CSegment( aIdx ); }
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///< Set line width.
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void SetWidth( int aWidth )
{
m_width = aWidth;
m_line.SetWidth( aWidth );
}
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///< Return line width.
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int Width() const { return m_width; }
///< Return true if the line is geometrically identical as line \a aOther.
bool CompareGeometry( const LINE& aOther );
///< Reverse the point/vertex order
void Reverse();
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///< Clip the line to the nearest obstacle, traversing from the line's start vertex (0).
///< Returns the clipped line.
const LINE ClipToNearestObstacle( NODE* aNode ) const;
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///< Clip the line to a given range of vertices.
void ClipVertexRange ( int aStart, int aEnd );
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///< Return the number of corners of angles specified by mask aAngles.
int CountCorners( int aAngles ) const;
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/**
* Calculate a line tightly wrapping a convex hull of an obstacle object (aObstacle).
* @param aPrePath is the path from origin to the obstacle.
* @param aWalkaroundPath is the path around the obstacle.
* @param aPostPath is the path from obstacle till the end.
* @param aCW determines whether to walk around in clockwise or counter-clockwise direction.
*/
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bool Walkaround( SHAPE_LINE_CHAIN aObstacle, SHAPE_LINE_CHAIN& aPre, SHAPE_LINE_CHAIN& aWalk,
SHAPE_LINE_CHAIN& aPost, bool aCw ) const;
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bool Walkaround( const SHAPE_LINE_CHAIN& aObstacle, SHAPE_LINE_CHAIN& aPath, bool aCw ) const;
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bool Is45Degree() const;
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///< Print out all linked segments.
void ShowLinks() const;
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bool EndsWithVia() const { return m_hasVia; }
void AppendVia( const VIA& aVia );
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void RemoveVia() { m_hasVia = false; }
const VIA& Via() const { return m_via; }
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void SetViaDiameter( int aDiameter ) { m_via.SetDiameter( aDiameter ); }
void SetViaDrill( int aDrill ) { m_via.SetDrill( aDrill ); }
virtual void Mark( int aMarker ) const override;
virtual void Unmark( int aMarker = -1 ) const override;
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virtual int Marker() const override;
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void SetBlockingObstacle( ITEM* aObstacle ) { m_blockingObstacle = aObstacle; }
ITEM* GetBlockingObstacle() const { return m_blockingObstacle; }
void DragSegment( const VECTOR2I& aP, int aIndex, bool aFreeAngle = false );
void DragCorner( const VECTOR2I& aP, int aIndex, bool aFreeAngle = false );
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void SetRank( int aRank ) override;
int Rank() const override;
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bool HasLoops() const;
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bool HasLockedSegments() const;
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void Clear();
OPT_BOX2I ChangedArea( const LINE* aOther ) const;
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void SetSnapThreshhold( int aThreshhold )
{
m_snapThreshhold = aThreshhold;
}
int GetSnapThreshhold() const
{
return m_snapThreshhold;
}
private:
void dragSegment45( const VECTOR2I& aP, int aIndex );
void dragCorner45( const VECTOR2I& aP, int aIndex );
void dragSegmentFree( const VECTOR2I& aP, int aIndex );
void dragCornerFree( const VECTOR2I& aP, int aIndex );
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VECTOR2I snapToNeighbourSegments( const SHAPE_LINE_CHAIN& aPath, const VECTOR2I& aP,
int aIndex ) const;
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VECTOR2I snapDraggedCorner( const SHAPE_LINE_CHAIN& aPath, const VECTOR2I& aP,
int aIndex ) const;
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SHAPE_LINE_CHAIN m_line; ///< The actual shape of the line.
int m_width; ///< Our width.
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int m_snapThreshhold; ///< Width to smooth out jagged segments.
bool m_hasVia; ///< Optional via at the end point.
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VIA m_via;
ITEM* m_blockingObstacle; ///< For mark obstacle mode.
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};
}
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#endif // __PNS_LINE_H