300 lines
7.8 KiB
C++
300 lines
7.8 KiB
C++
/*
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* KiRouter - a push-and-(sometimes-)shove PCB router
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*
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* Copyright (C) 2013-2017 CERN
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* Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
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* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __PNS_LINE_H
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#define __PNS_LINE_H
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#include <math/box2.h>
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#include <math/vector2d.h>
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#include <geometry/direction45.h>
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#include <geometry/seg.h>
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#include <geometry/shape.h>
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#include <geometry/shape_line_chain.h>
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#include "pns_item.h"
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#include "pns_via.h"
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#include "pns_link_holder.h"
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namespace PNS {
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class LINKED_ITEM;
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class NODE;
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class VIA;
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/**
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* LINE
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*
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* Represents a track on a PCB, connecting two non-trivial joints (that is,
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* vias, pads, junctions between multiple traces or two traces different widths
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* and combinations of these). PNS_LINEs are NOT stored in the model (NODE).
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* Instead, they are assembled on-the-fly, based on a via/pad/segment that
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* belongs to/starts/ends them.
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*
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* PNS_LINEs can be either loose (consisting of segments that do not belong to
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* any NODE) or owned (with segments taken from a NODE) - these are
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* returned by NODE::AssembleLine and friends.
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*
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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.
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*/
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#define PNS_HULL_MARGIN 10
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class LINE : public LINK_HOLDER
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{
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public:
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/**
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* Constructor
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* Makes an empty line.
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*/
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LINE() : LINK_HOLDER( LINE_T )
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{
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m_hasVia = false;
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m_width = 1; // Dummy value
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m_snapThreshhold = 0;
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}
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LINE( const LINE& aOther );
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/**
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* Constructor
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* Copies properties (net, layers, etc.) from a base line and replaces the shape
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* by another
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**/
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LINE( const LINE& aBase, const SHAPE_LINE_CHAIN& aLine )
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: LINK_HOLDER( aBase ),
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m_line( aLine ),
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m_width( aBase.m_width ),
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m_snapThreshhold( aBase.m_snapThreshhold )
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{
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m_net = aBase.m_net;
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m_layers = aBase.m_layers;
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m_hasVia = false;
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}
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/**
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* Constructor
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* Constructs a LINE for a lone VIA (ie a stitching via).
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* @param aVia
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*/
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LINE( const VIA& aVia ) :
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LINK_HOLDER( LINE_T )
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{
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m_hasVia = true;
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m_via = aVia;
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m_width = aVia.Diameter();
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m_net = aVia.Net();
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m_layers = aVia.Layers();
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m_rank = aVia.Rank();
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m_snapThreshhold = 0;
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}
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~LINE();
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static inline bool ClassOf( const ITEM* aItem )
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{
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return aItem && LINE_T == aItem->Kind();
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}
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/// @copydoc ITEM::Clone()
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virtual LINE* Clone() const override;
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LINE& operator=( const LINE& aOther );
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bool IsLinkedChecked() const
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{
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return IsLinked() && LinkCount() == SegmentCount();
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}
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///> Assigns a shape to the line (a polyline/line chain)
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void SetShape( const SHAPE_LINE_CHAIN& aLine )
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{
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m_line = aLine;
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m_line.SetWidth( m_width );
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}
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///> Returns the shape of the line
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const SHAPE* Shape() const override
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{
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return &m_line;
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}
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///> Modifiable accessor to the underlying shape
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SHAPE_LINE_CHAIN& Line()
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{
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return m_line;
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}
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///> Const accessor to the underlying shape
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const SHAPE_LINE_CHAIN& CLine() const
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{
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return m_line;
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}
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///> Returns the number of segments in the line
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int SegmentCount() const
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{
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return m_line.SegmentCount();
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}
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///> Returns the number of points in the line
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int PointCount() const
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{
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return m_line.PointCount();
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}
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///> Returns the number of arcs in the line
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int ArcCount() const
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{
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return m_line.ArcCount();
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}
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///> Returns the aIdx-th point of the line
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const VECTOR2I& CPoint( int aIdx ) const
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{
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return m_line.CPoint( aIdx );
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}
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///> Returns the aIdx-th segment of the line
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const SEG CSegment( int aIdx ) const
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{
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return m_line.CSegment( aIdx );
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}
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///> Sets line width
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void SetWidth( int aWidth )
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{
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m_width = aWidth;
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m_line.SetWidth( aWidth );
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}
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///> Returns line width
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int Width() const
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{
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return m_width;
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}
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///> Returns true if the line is geometrically identical as line aOther
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bool CompareGeometry( const LINE& aOther );
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///> Reverses the point/vertex order
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void Reverse();
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///> Clips the line to the nearest obstacle, traversing from the line's start vertex (0).
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///> Returns the clipped line.
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const LINE ClipToNearestObstacle( NODE* aNode ) const;
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///> Clips the line to a given range of vertices.
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void ClipVertexRange ( int aStart, int aEnd );
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///> Returns the number of corners of angles specified by mask aAngles.
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int CountCorners( int aAngles ) const;
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///> Calculates a line thightly wrapping a convex hull
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///> of an obstacle object (aObstacle).
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///> aPrePath = path from origin to the obstacle
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///> aWalkaroundPath = path around the obstacle
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///> aPostPath = past from obstacle till the end
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///> aCW = whether to walk around in clockwise or counter-clockwise direction.
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bool Walkaround( SHAPE_LINE_CHAIN aObstacle,
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SHAPE_LINE_CHAIN& aPre,
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SHAPE_LINE_CHAIN& aWalk,
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SHAPE_LINE_CHAIN& aPost,
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bool aCw ) const;
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bool Walkaround( const SHAPE_LINE_CHAIN& aObstacle,
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SHAPE_LINE_CHAIN& aPath,
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bool aCw ) const;
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bool Is45Degree() const;
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///> Prints out all linked segments
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void ShowLinks() const;
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bool EndsWithVia() const { return m_hasVia; }
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void AppendVia( const VIA& aVia );
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void RemoveVia() { m_hasVia = false; }
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const VIA& Via() const { return m_via; }
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virtual void Mark( int aMarker ) override;
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virtual void Unmark( int aMarker = -1 ) override;
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virtual int Marker() const override;
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void DragSegment( const VECTOR2I& aP, int aIndex, bool aFreeAngle = false );
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void DragCorner( const VECTOR2I& aP, int aIndex, bool aFreeAngle = false );
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void SetRank( int aRank ) override;
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int Rank() const override;
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bool HasLoops() const;
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bool HasLockedSegments() const;
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void Clear();
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void Merge ( const LINE& aOther );
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OPT_BOX2I ChangedArea( const LINE* aOther ) const;
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void SetSnapThreshhold( int aThreshhold )
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{
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m_snapThreshhold = aThreshhold;
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}
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int GetSnapThreshhold() const
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{
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return m_snapThreshhold;
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}
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private:
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void dragSegment45( const VECTOR2I& aP, int aIndex );
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void dragCorner45( const VECTOR2I& aP, int aIndex );
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void dragSegmentFree( const VECTOR2I& aP, int aIndex );
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void dragCornerFree( const VECTOR2I& aP, int aIndex );
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VECTOR2I snapToNeighbourSegments(
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const SHAPE_LINE_CHAIN& aPath, const VECTOR2I& aP, int aIndex ) const;
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VECTOR2I snapDraggedCorner(
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const SHAPE_LINE_CHAIN& aPath, const VECTOR2I& aP, int aIndex ) const;
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///> The actual shape of the line
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SHAPE_LINE_CHAIN m_line;
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///> our width
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int m_width;
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///> If true, the line ends with a via
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bool m_hasVia;
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///> Width to smooth out jagged segments
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int m_snapThreshhold;
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///> Via at the end point, if m_hasVia == true
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VIA m_via;
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};
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}
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#endif // __PNS_LINE_H
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