kicad/pcbnew/router/pns_line_placer.h

371 lines
11 KiB
C++

/*
* 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>
*
* 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/>.
*/
#ifndef __PNS_LINE_PLACER_H
#define __PNS_LINE_PLACER_H
#include <math/vector2d.h>
#include <geometry/shape.h>
#include <geometry/shape_line_chain.h>
#include "pns_sizes_settings.h"
#include "pns_node.h"
#include "pns_via.h"
#include "pns_line.h"
#include "pns_placement_algo.h"
#include "pns_mouse_trail_tracer.h"
namespace PNS {
class ROUTER;
class SHOVE;
class OPTIMIZER;
class VIA;
class SIZES_SETTINGS;
class NODE;
class FIXED_TAIL
{
public:
FIXED_TAIL( int aLineCount = 1);
~FIXED_TAIL();
struct FIX_POINT
{
int layer;
bool placingVias;
VECTOR2I p;
DIRECTION_45 direction;
};
struct STAGE
{
NODE* commit;
std::vector<FIX_POINT> pts;
};
void Clear();
void AddStage( const VECTOR2I& aStart, int aLayer, bool placingVias, DIRECTION_45 direction,
NODE* aNode );
bool PopStage( STAGE& aStage );
int StageCount() const;
private:
std::vector<STAGE> m_stages;
};
/**
* Single track placement algorithm. Interactively routes a track.
* Applies shove and walkaround algorithms when needed.
*/
class LINE_PLACER : public PLACEMENT_ALGO
{
public:
LINE_PLACER( ROUTER* aRouter );
~LINE_PLACER();
/**
* Start routing a single track at point aP, taking item aStartItem as anchor (unless NULL).
*/
bool Start( const VECTOR2I& aP, ITEM* aStartItem ) override;
/**
* Move the end of the currently routed trace to the point \a aP, taking \a aEndItem as
* anchor (if not NULL).
*/
bool Move( const VECTOR2I& aP, ITEM* aEndItem ) override;
/**
* Commit the currently routed track to the parent node taking \a aP as the final end point
* and \a aEndItem as the final anchor (if provided).
*
* @return true if route has been committed. May return false if the routing result is
* violating design rules. In such cases, the track is only committed if
* CanViolateDRC() is on.
*/
bool FixRoute( const VECTOR2I& aP, ITEM* aEndItem, bool aForceFinish ) override;
bool UnfixRoute() override;
bool CommitPlacement() override;
bool AbortPlacement() override;
bool HasPlacedAnything() const override;
/**
* Enable/disable a via at the end of currently routed trace.
*/
bool ToggleVia( bool aEnabled ) override;
/**
* Set the current routing layer.
*/
bool SetLayer( int aLayer ) override;
/**
* Return the "head" of the line being placed, that is the volatile part that has not been
* "fixed" yet.
*/
const LINE& Head() const { return m_head; }
/**
* Return the "tail" of the line being placed, the part which has already wrapped around
* and shoved some obstacles.
*/
const LINE& Tail() const { return m_tail; }
/**
* Return the complete routed line.
*/
const LINE Trace() const;
/**
* Return the complete routed line, as a single-member ITEM_SET.
*/
const ITEM_SET Traces() override;
/**
* Return the current end of the line being placed. It may not be equal to the cursor
* position due to collisions.
*/
const VECTOR2I& CurrentEnd() const override
{
return m_currentEnd;
}
/**
* Return the net code of currently routed track.
*/
const std::vector<int> CurrentNets() const override
{
return std::vector<int>( 1, m_currentNet );
}
/**
* Return the layer of currently routed track.
*/
int CurrentLayer() const override
{
return m_currentLayer;
}
/**
* Return the most recent world state.
*/
NODE* CurrentNode( bool aLoopsRemoved = false ) const override;
/**
* Toggle the current posture (straight/diagonal) of the trace head.
*/
void FlipPosture() override;
/**
* Perform on-the-fly update of the width, via diameter & drill size from a settings class.
*
* Performs on-the-fly update of the width, via diameter & drill size from a settings class.
* Used to dynamically change these parameters as the track is routed.
*/
void UpdateSizes( const SIZES_SETTINGS& aSizes ) override;
void SetOrthoMode( bool aOrthoMode ) override;
bool IsPlacingVia() const override { return m_placingVia; }
void GetModifiedNets( std::vector<int>& aNets ) const override;
/**
* Check if point \a aP lies on segment \a aSeg. If so, splits the segment in two, forming a
* joint at \a aP and stores updated topology in node \a aNode.
*/
bool SplitAdjacentSegments( NODE* aNode, ITEM* aSeg, const VECTOR2I& aP );
private:
/**
* Re-route the current track to point aP. Returns true, when routing has completed
* successfully (i.e. the trace end has reached point \a aP), and false if the trace was
* stuck somewhere on the way. May call routeStep() repetitively due to mouse smoothing.
*
* @param aP ending point of current route.
* @return true, if the routing is complete.
*/
bool route( const VECTOR2I& aP );
/**
* Draw the "leading" rats nest line, which connects the end of currently routed track and
* the nearest yet unrouted item. If the routing for current net is complete, draws nothing.
*/
void updateLeadingRatLine();
/**
* Set the board to route.
*/
void setWorld( NODE* aWorld );
/**
* Initialize placement of a new line with given parameters.
*/
void initPlacement();
/**
* Set preferred direction of the very first track segment to be laid.
* Used by posture switching mechanism.
*/
void setInitialDirection( const DIRECTION_45& aDirection );
/**
* Searches aNode for traces concurrent to aLatest and removes them. Updated
* topology is stored in aNode.
*/
void removeLoops( NODE* aNode, LINE& aLatest );
/**
* Assemble a line starting from segment or arc aLatest, removes collinear segments
* and redundant vertices. If a simplification has been found, replaces the old line
* with the simplified one in \a aNode.
*/
void simplifyNewLine( NODE* aNode, LINKED_ITEM* aLatest );
/**
* Check if the head of the track intersects its tail. If so, cuts the tail up to the
* intersecting segment and fixes the head direction to match the last segment before
* the cut.
*
* @return true if the line has been changed.
*/
bool handleSelfIntersections();
/**
* Deal with pull-back: reduces the tail if head trace is moved backwards wrs to the
* current tail direction.
*
* @return true if the line has been changed.
*/
bool handlePullback();
/**
* Moves "established" segments from the head to the tail if certain conditions are met.
*
* @return true, if the line has been changed.
*/
bool mergeHead();
/**
* Attempt to reduce the number of segments in the tail by trying to replace a certain
* number of latest tail segments with a direct trace leading to \a aEnd that does not
* collide with anything.
*
* @param aEnd is the current routing destination point.
* @return true if the line has been changed.
*/
bool reduceTail( const VECTOR2I& aEnd );
/**
* Try to reduce the corner count of the most recent part of tail/head by merging
* obtuse/collinear segments.
*
* @return true if the line has been changed.
*/
bool optimizeTailHeadTransition();
/**
* Compute the head trace between the current start point (m_p_start) and point \a aP,
* starting with direction defined in m_direction. The trace walks around all
* colliding solid or non-movable items. Movable segments are ignored, as they'll be
* handled later by the shove algorithm.
*/
bool routeHead( const VECTOR2I& aP, LINE& aNewHead );
/**
* Perform a single routing algorithm step, for the end point \a aP.
*
* @param aP is the ending point of current route.
* @return true if the line has been changed.
*/
void routeStep( const VECTOR2I& aP );
///< Route step walk around mode.
bool rhWalkOnly( const VECTOR2I& aP, LINE& aNewHead );
///< Route step shove mode.
bool rhShoveOnly( const VECTOR2I& aP, LINE& aNewHead );
///< Route step mark obstacles mode.
bool rhMarkObstacles( const VECTOR2I& aP, LINE& aNewHead );
const VIA makeVia( const VECTOR2I& aP );
bool buildInitialLine( const VECTOR2I& aP, LINE& aHead, bool aForceNoVia = false );
DIRECTION_45 m_direction; ///< current routing direction
DIRECTION_45 m_initial_direction; ///< routing direction for new traces
LINE m_head; ///< the volatile part of the track from the previously
///< analyzed point to the current routing destination
LINE m_last_head; ///< Most recent successful (non-colliding) head
LINE m_tail; ///< routing "tail": part of the track that has been already
///< fixed due to collisions with obstacles
NODE* m_world; ///< pointer to world to search colliding items
VECTOR2I m_p_start; ///< current routing start (end of tail, beginning of head)
std::unique_ptr<SHOVE> m_shove; ///< The shove engine
NODE* m_currentNode; ///< Current world state
NODE* m_lastNode; ///< Postprocessed world state (including marked collisions &
///< removed loops)
SIZES_SETTINGS m_sizes;
bool m_placingVia;
int m_currentNet;
int m_currentLayer;
VECTOR2I m_currentEnd;
VECTOR2I m_currentStart;
LINE m_currentTrace;
PNS_MODE m_currentMode;
ITEM* m_startItem;
bool m_idle;
bool m_chainedPlacement;
bool m_orthoMode;
bool m_placementCorrect;
FIXED_TAIL m_fixedTail;
MOUSE_TRAIL_TRACER m_mouseTrailTracer;
};
}
#endif // __PNS_LINE_PLACER_H