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https://gitlab.com/kicad/code/kicad.git
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b2be0d39bd
This is a pretty major rework of the snapping system. The GRID_HELPERs now have a separate CONSTRUCTION_MANAGER which handles some of the state involving "construction geometry". This is fed with 'extended' geometry (e.g. "infinite" lines from segments) for use in generating things like intersection points. It also handles adding this geoemtry to a GAL view item (CONSTRUCTION_GEOM) for display to the user. The process is: * A TOOL creates a GRID_HELPER * Optionally, it pre-loads a "persistent" batch of construction geometry (e.g. for an item's original position) * The grid helper finds useful snap 'anchors' as before, including those involving the construction items. * Other items on the board can be 'activated' by snapping to one of their main points. Then, if it has construction geometry, it will be added to the display. At most 2 items of this kind of geometry are shown, plus the original item, to reduce avoid too much clutter. The dashed snap lines state machine is also handled in the CONSTRUCTION_MANAGER and displayed in the CONSTRUCTION_GEOM item.
67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
/*
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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) 2024 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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#pragma once
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#include <geometry/seg.h>
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/*
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* A geometric line of infinite length.
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*
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* In terms of geometric ops, a SEG would probably do as it has the same definition,
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* but a separate class is more explicit and also allows compile-time
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* reasoning about the meaning of the object through the type system.
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*/
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class LINE
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{
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public:
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using ecoord = VECTOR2I::extended_type;
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LINE( const SEG& aSeg ) : m_seg( aSeg ) {}
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LINE( const VECTOR2I& aStart, const VECTOR2I& aEnd ) : m_seg( aStart, aEnd ) {}
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bool operator==( const LINE& aOther ) const { return m_seg == aOther.m_seg; }
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/**
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* Gets the (one of the infinite number of) segments that the line passes through.
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*/
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const SEG& GetContainedSeg() const { return m_seg; }
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OPT_VECTOR2I Intersect( const SEG& aOther ) const;
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OPT_VECTOR2I Intersect( const LINE& aOther ) const;
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/**
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* Gets the distance from the line to the given point.
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*/
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int Distance( const VECTOR2I& aPoint ) const;
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/**
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* Gets the nearest point on the line to the given point.
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*/
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VECTOR2I NearestPoint( const VECTOR2I& aPoint ) const;
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private:
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/// Internally, we can represent a just a segment that the line passes through
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SEG m_seg;
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}; |