kicad/pcbnew/teardrop/teardrop.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2021 Jean-Pierre Charras, jp.charras at wanadoo.fr
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* Copyright (C) 2022 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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 2
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
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#ifndef TEARDROP_H
#define TEARDROP_H
#include <pcb_edit_frame.h>
#include <board.h>
#include <footprint.h>
#include <pad.h>
#include <pcb_track.h>
#include <zone.h>
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#include "teardrop_parameters.h"
#define MAGIC_TEARDROP_PADVIA_NAME "$teardrop_padvia$"
#define MAGIC_TEARDROP_TRACK_NAME "$teardrop_track$"
class TRACK_BUFFER;
/**
* Stores info of a pad, via or track end to build a teardrop
*/
struct VIAPAD
{
VIAPAD( PCB_VIA* aVia );
VIAPAD( PAD* aPad );
VIAPAD( PCB_TRACK* aTrack, ENDPOINT_T aEndPoint );
bool IsOnLayer( PCB_LAYER_ID aLayer ) const
{
return m_Parent->IsOnLayer( aLayer );
}
VECTOR2I m_Pos;
int m_Width; // The diameter of a round shape, or the min size for others
int m_Drill;
int m_NetCode;
bool m_IsRound; // true for round shapes, false for any other shape
bool m_IsPad; // true for pads, false for vias and tracks
BOARD_CONNECTED_ITEM* m_Parent;
};
/**
* TEARDROP_MANAGER manage and build teardrop areas
* A teardrop area is a polygonal area (a copper ZONE) having:
* 2 points on the track connected to a pad or via
* 2 points on the outline of this pad or via
* 1 point near the pad/via position (calculated in order to have this pad/via position
* inside the area
* The 2 sides joining a point on the track to the corresponding point on the pad/via
* outline can be a straight line or a curved shape (defined from a Bezier curve)
* This curved shape is built by segments (3 to 10) from this Bezier curve
* Because one cannot build a suitable shape for a custom pad, custom pads are ignored.
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* Size of area (height and length) are defined from the pad/via size or for pads having
* a size X and a size Y, the smallest of X,Y size.
*/
class TEARDROP_MANAGER
{
friend class TEARDROP_PARAMETERS;
public:
enum TEARDROP_VARIANT
{
TD_TYPE_PADVIA, // Specify a teardrop on a pad via
TD_TYPE_TRACKEND // specify a teardrop on a rond end of a wide track
};
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TEARDROP_MANAGER( BOARD* aBoard, PCB_EDIT_FRAME* aFrame );
/**
* Set teardrops on a teardrop free board
* @return the number of teardrop created
* @param aCommitter is a BOARD_COMMIT reference (can be null)
* @param aFollowTracks = true to use a track connected to the initial track connected
* to a pad / via if this initial track is too short to build the teardrop
*/
int SetTeardrops( BOARD_COMMIT* aCommitter,
bool aFollowTracks = true );
/**
* Remove all teardrops
* @return the count of removed teardrops
* @param aCommitter is a BOARD_COMMITto handle undo/Redo commands
* @param aCommitAfterRemove = true to commit when removed,
* false if some other changes must be made and the actual commit postponed
* Can be nullptr
*/
int RemoveTeardrops( BOARD_COMMIT* aCommitter, bool aCommitAfterRemove );
private:
/**
* Collect and build the list of all vias from the given board
*/
void collectVias( std::vector< VIAPAD >& aList ) const;
/**
* Build a list of pads candidate for teardrops from the given board
* Pads with no net are not candidate (and have no track connected
* Custom pads are not candidate because one cannot define a teardrop shape
* @param aList is the list of VIAPAD to fill
* @param aDrilledViaPad = true to include drilled shapes
* @param aRoundShapesOnly = true to ignore not round shapes
* @param aIncludeNotDrilled = true to include not drilled pads like SMD
*/
void collectPadsCandidate( std::vector< VIAPAD >& aList,
bool aDrilledViaPad,
bool aRoundShapesOnly,
bool aIncludeNotDrilled ) const;
/**
* Build a list of all teardrops on the current board
* @param aList is the list to populate
*/
void collectTeardrops( std::vector< ZONE* >& aList ) const;
/**
* Add teardrop on tracks of different sizes connected by their end
*/
int addTeardropsOnTracks( BOARD_COMMIT* aCommitter );
/**
* @return true if the given aVia + aTrack is located inside a zone of the same netname
*/
bool isViaAndTrackInSameZone( VIAPAD& aVia, PCB_TRACK* aTrack) const;
/**
* Compute the curve part points for teardrops connected to a round shape
* The Bezier curve control points are optimized for a round pad/via shape,
* and do not give a good curve shape for other pad shapes
* use m_m_heightRatio
*/
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void computeCurvedForRoundShape( TEARDROP_PARAMETERS* aCurrParams,
std::vector<VECTOR2I>& aPoly,
int aTrackHalfWidth,
VECTOR2D aTrackDir, VIAPAD& aViaPad,
std::vector<VECTOR2I>& aPts ) const;
/**
* Compute the curve part points for teardrops connected to a rectangular/polygonal shape
* The Bezier curve control points are not optimized for a special shape,
* so use computeCurvedForRoundShape() for round shapes for better result
*/
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void computeCurvedForRectShape( TEARDROP_PARAMETERS* aCurrParams,
std::vector<VECTOR2I>& aPoly, int aTdHeight,
int aTrackHalfWidth, VIAPAD& aViaPad,
std::vector<VECTOR2I>& aPts ) const;
/**
* Compute all teardrop points of the polygon shape
* @return true if the polygonal shape was calculated, false if not buildable
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* use m_lengthRatio and m_heightRatio
*/
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bool computeTeardropPolygonPoints( TEARDROP_PARAMETERS* aCurrParams,
std::vector<VECTOR2I>& aCorners,
PCB_TRACK* aTrack, VIAPAD& aVia,
bool aFollowTracks,
TRACK_BUFFER& aTrackLookupList) const;
/**
* Compute the 2 points on pad/via of the teardrop shape
* @return false if these 2 points are not found
* @param aTrack is the reference track included in teardrop
* @param aViaPad is the teardrop anchor
* teardrop height = aViaPad size * aHeightRatio
* @param aPts is the buffer that contains initial and final teardrop polygonal shape
* in aPts:
* A and B ( aPts[0] and aPts[1] ) are points on the track
* C and E ( aPts[2] and aPts[4] ) are points on the aViaPad
* D ( aPts[3] ) is midpoint behind the aViaPad centre
* m_heightRatio is the factor to calculate the aViaPad teardrop size
*/
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bool ComputePointsOnPadVia( TEARDROP_PARAMETERS* aCurrParams,
PCB_TRACK* aTrack, VIAPAD& aViaPad,
std::vector<VECTOR2I>& aPts ) const;
/**
* Find a track connected to the end of another track
* @return a reference to the touching track (or nullptr)
* @param aMatchType returns the end point id 0, STARTPOINT, ENDPOINT
* @param aTrackRef is the reference track
* @param aEndpoint is the coordinate to test
* @param aTrackLookupList is the buffer of available tracks
*/
PCB_TRACK* findTouchingTrack( EDA_ITEM_FLAGS& aMatchType, PCB_TRACK* aTrackRef,
const VECTOR2I& aEndPoint,
TRACK_BUFFER& aTrackLookupList ) const;
/**
* Creates a teardrop (a ZONE item) from its polygonal shape, track netcode and layer
* @param aTeardropVariant = variant of the teardrop( attached to a pad, or a track end )
* @param aPoints is the polygonal shape
* @param aTrack is the track connected to the starting points of the teardrop
* (mainly for net info)
*/
ZONE* createTeardrop( TEARDROP_VARIANT aTeardropVariant,
std::vector<VECTOR2I>& aPoints, PCB_TRACK* aTrack) const;
/**
* Set priority of created teardrops. smaller have bigger priority
*/
void setTeardropPriorities();
/**
* @return true if a point on a track can be found as anchor point of a teardrop
* @param aStartPoint is the start point of the track found (always inside the teardrop)
* @param aEndPoint is the start point of the track found (always outside the teardrop)
* @param aTrack is the track connected to the pad/via used to search a anchor point
* this reference can be modified if a connected track to the initial track is selected
* @param aViaPad is the via/pad used to build the teardrop
* @param aEffectiveTeardropLen is the actual teardrop length, that can be smaller than expected
* if the connected track length is too small
* @param aFollowTracks = true to use a connected track to aTrack if aTrack is too small
* @param aTrackLookupList is the list of tracks to explore if aFollowTracks = true
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* m_lengthRatio is the length of teardrop (ratio pad/via size/teardrop len)
*/
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bool findAnchorPointsOnTrack( TEARDROP_PARAMETERS* aCurrParams,
VECTOR2I& aStartPoint, VECTOR2I& aEndPoint,
PCB_TRACK*& aTrack, VIAPAD& aViaPad,
int* aEffectiveTeardropLen,
bool aFollowTracks, TRACK_BUFFER& aTrackLookupList ) const;
private:
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int m_tolerance; // max distance between a track end point and a pad/via center to
// see them connected to ut a teardrop
BOARD* m_board;
TEARDROP_PARAMETERS_LIST* m_prmsList; // the teardrop parameters list, from the board design settings
std::vector<ZONE*> m_createdTdList; // list of new created teardrops
};
// A class to store tracks grouped by layer and netcode
class TRACK_BUFFER
{
public:
TRACK_BUFFER() {}
/**
* Add a track in buffer, in space grouping tracks having the same netcode and the same layer
*/
void AddTrack( PCB_TRACK* aTrack, int aLayer, int aNetcode );
/**
* @return the buffer that stores tracks having the same layer and the same netcode
*/
std::vector<PCB_TRACK*>* GetTrackList( int aLayer, int aNetcode )
{
return m_map_tracks.at( idxFromLayNet( aLayer, aNetcode ) );
}
/**
* @return a reference to the internal buffer
*/
std::map< int, std::vector<PCB_TRACK*>* >& GetBuffer() { return m_map_tracks ; }
static void GetNetcodeAndLayerFromIndex( int aIdx, int* aLayer, int* aNetcode )
{
*aLayer = aIdx & 0xFF;
*aNetcode = aIdx >> 8;
}
private:
// Build an index from the layer id and the netcode, to store a track in buffer
int idxFromLayNet( int aLayer, int aNetcode ) const
{
return ( aNetcode << 8 ) + ( aLayer & 0xFF );
}
// Track buffer, tracks are grouped by layer+netcode
std::map< int, std::vector<PCB_TRACK*>* > m_map_tracks;
};
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#endif // ifndef TEARDROP_H