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263 lines
10 KiB
263 lines
10 KiB
/**
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* @file connect.h
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* @brief helper classes to find track to track and track to pad connections.
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*/
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#ifndef CONNECT_H
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#define CONNECT_H
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/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2012 Jean-Pierre Charras, jp.charras at wanadoo.fr
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* Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
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* Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <class_track.h>
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#include <class_board.h>
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// Helper classes to handle connection points (i.e. candidates) for tracks
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/* class CONNECTED_POINT describes a coordinate having a track or pad parent.
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* when a pad is the parent, the coordinate is (obviously) the connection point
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* when a track is the parent, the coordinate is the staring point
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* or the ending point.
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* therefore when building a list of CONNECTED_POINT, a pad or via generates one item,
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* and a track generates 2 items.
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*/
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class CONNECTED_POINT
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{
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private:
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BOARD_CONNECTED_ITEM * m_item; // a link to the parent item (track, via or pad)
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wxPoint m_point; // coordinates of this connected point
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public:
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// ctor to build a CONNECTED_POINT instance, when the parent is a track or via
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CONNECTED_POINT( TRACK * aTrack, const wxPoint & aPoint)
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{
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m_item = aTrack;
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m_point = aPoint;
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}
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// ctor to build a CONNECTED_POINT instance, when the parent is a pad
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CONNECTED_POINT( D_PAD * aPad, const wxPoint & aPoint)
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{
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m_item = aPad;
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m_point = aPoint;
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}
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/**
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* Function GetTrack
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* @return the parent track or via of this connected point,
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* or null if the parent is a pad
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*/
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TRACK * GetTrack() const
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{
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return m_item->Type() != PCB_PAD_T ? (TRACK*) m_item : NULL ;
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}
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/**
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* Function GetPad
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* @return the parent pad of this connected point,
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* or null if the parent is a track or via
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*/
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D_PAD * GetPad() const
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{
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return m_item->Type() == PCB_PAD_T ? (D_PAD*) m_item : NULL;
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}
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const wxPoint & GetPoint() const { return m_point; }
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};
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// A helper class to handle connections calculations:
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class CONNECTIONS
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{
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private:
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std::vector <TRACK*> m_connected; // List of connected tracks/vias
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// to a given track or via
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std::vector <CONNECTED_POINT> m_candidates; // List of points to test
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// (end points of tracks or vias location )
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BOARD * m_brd; // the master board.
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const TRACK * m_firstTrack; // The first track used to build m_Candidates
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const TRACK * m_lastTrack; // The last track used to build m_Candidates
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std::vector<D_PAD*> m_sortedPads; // list of sorted pads by X (then Y) coordinate
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public:
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CONNECTIONS( BOARD * aBrd );
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~CONNECTIONS() {};
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/**
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* Function BuildPadsList
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* Fills m_sortedPads with all pads that be connected to tracks
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* pads are sorted by > then Y coordinates to allow fast binary search in list
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* @param aNetcode = net code to use to filter pads
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* if aNetcode < 0, all pads will be put in list (default)
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*/
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void BuildPadsList( int aNetcode = -1 );
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/**
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* Function GetPadsList
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* @return the pads list used in connections calculations
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*/
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std::vector<D_PAD*>& GetPadsList() { return m_sortedPads; }
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/**
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* Function Build_CurrNet_SubNets_Connections
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* should be called after a track change (delete or add a track):
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* Connections to pads and to tracks are recalculated
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* If a track is deleted, the other pointers to pads do not change.
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* When a new track is added in track list, its pointers to pads are already initialized
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* Builds the subnets inside a net (tracks from aFirstTrack to aFirstTrack).
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* subnets are clusters of pads and tracks that are connected together.
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* When all tracks are created relative to the net, there is only a cluster
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* when not tracks there are a cluster per pad
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* @param aFirstTrack = first track of the given net
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* @param aLastTrack = last track of the given net
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* @param aNetcode = the netcode of the given net
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*/
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void Build_CurrNet_SubNets_Connections( TRACK* aFirstTrack, TRACK* aLastTrack, int aNetcode );
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/**
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* Function BuildTracksCandidatesList
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* Fills m_Candidates with all connecting points (track ends or via location)
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* with tracks from aBegin to aEnd.
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* @param aBegin = first track to store in list (should not be NULL)
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* @param aEnd = last track to store in list
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* if aEnd == NULL, uses all tracks from aBegin
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*/
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void BuildTracksCandidatesList( TRACK * aBegin, TRACK * aEnd = NULL);
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/**
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* Function BuildPadsCandidatesList
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* Populates m_candidates with all pads connecting points (pads position)
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* m_sortedPads is expected to be populated by the pad candidates list
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*/
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void BuildPadsCandidatesList();
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/**
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* function SearchConnectedTracks
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* Populates .m_connected with tracks/vias connected to aTrack
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* m_candidates is expected to be populated by the track candidates ends list
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* @param aTrack = track or via to use as reference
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*/
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int SearchConnectedTracks( const TRACK * aTrack );
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/**
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* Function GetConnectedTracks
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* Copy m_Connected that contains the list of tracks connected
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* calculated by SearchConnectedTracks
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* in aTrack->m_TracksConnected
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* @param aTrack = track or via to fill with connected tracks
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*/
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void GetConnectedTracks(TRACK * aTrack)
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{
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aTrack->m_TracksConnected = m_connected;
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}
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/**
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* function SearchConnectionsPadsToIntersectingPads
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* Explores the list of pads and adds to m_PadsConnected member
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* of each pad pads connected to
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* Here, connections are due to intersecting pads, not tracks
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* m_sortedPads must be initialized
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*/
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void SearchConnectionsPadsToIntersectingPads();
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/**
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* function SearchTracksConnectedToPads
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* Explores the list of pads.
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* if( add_to_padlist )
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* adds to m_PadsConnected member of each track the pad(s) connected to
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* if add_to_tracklist
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* adds to m_TracksConnected member of each pad the track(s) connected to
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* D_PAD::m_TracksConnected is cleared before adding items
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* TRACK::m_PadsConnected is not cleared
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* @param add_to_padlist = true to fill m_PadsConnected member of each track
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* @param add_to_tracklist = true to fill m_TracksConnected member of each pad
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*/
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void SearchTracksConnectedToPads( bool add_to_padlist = true, bool add_to_tracklist = true);
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/**
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* function CollectItemsNearTo
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* Used by SearchTracksConnectedToPads
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* Fills aList with pads near to aPosition
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* near means aPosition to pad position <= aDistMax
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* @param aList = list to fill
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* @param aPosition = aPosition to use as reference
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* @param aDistMax = dist max from aPosition to a candidate to select it
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*/
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void CollectItemsNearTo( std::vector<CONNECTED_POINT*>& aList,
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const wxPoint& aPosition, int aDistMax );
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/**
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* Function Propagate_SubNets
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* Test a list of tracks, to create or propagate a sub netcode to pads and
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* segments connected together.
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* The track list must be sorted by nets, and all segments
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* from m_firstTrack to m_lastTrack have the same net.
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* When 2 items are connected (a track to a pad, or a track to an other track),
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* they are grouped in a cluster.
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* For pads, this is the .m_physical_connexion member which is a cluster identifier
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* For tracks, this is the .m_Subnet member which is a cluster identifier
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* For a given net, if all tracks are created, there is only one cluster.
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* but if not all tracks are created, there are more than one cluster,
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* and some ratsnests will be left active.
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*/
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void Propagate_SubNets();
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private:
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/**
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* function searchEntryPointInCandidatesList
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* Search an item in m_Connected connected to aPoint
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* note m_Connected containts usually more than one candidate
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* and searchEntryPointInCandidatesList returns an index to one of these candidates
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* Others are neightbor of the indexed item.
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* @param aPoint is the reference coordinates
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* @return the index of item found or -1 if no candidate
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*/
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int searchEntryPointInCandidatesList( const wxPoint & aPoint);
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/**
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* Function Merge_SubNets
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* Change a subnet old value to a new value, for tracks and pads which are connected to
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* tracks from m_firstTrack to m_lastTrack and their connected pads.
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* and modify the subnet parameter (change the old value to the new value).
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* After that, 2 cluster (or subnets) are merged into only one.
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* Note: the resulting sub net value is the smallest between aOldSubNet and aNewSubNet
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* @return modification count
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* @param aOldSubNet = subnet value to modify
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* @param aNewSubNet = new subnet value for each item which have old_val as subnet value
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*/
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int Merge_SubNets( int aOldSubNet, int aNewSubNet );
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/**
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* Function Merge_PadsSubNets
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* Change a subnet value to a new value, in m_sortedPads pad list
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* After that, 2 cluster (or subnets) are merged into only one.
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* Note: the resulting subnet value is the smallest between aOldSubNet et aNewSubNet
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* @return modification count
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* @param aOldSubNet = subnet value to modify
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* @param aNewSubNet = new subnet value for each item which have old_val as subnet value
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*/
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int Merge_PadsSubNets( int aOldSubNet, int aNewSubNet );
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};
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#endif // ifndef CONNECT_H
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