253 lines
7.1 KiB
C++
253 lines
7.1 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) 2017-2023 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 <limits>
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#include <vector>
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#include <preview_items/polygon_geom_manager.h>
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#include <geometry/geometry_utils.h>
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#include <geometry/shape_line_chain.h>
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POLYGON_GEOM_MANAGER::POLYGON_GEOM_MANAGER( CLIENT& aClient ):
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m_client( aClient ),
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m_leaderMode( LEADER_MODE::DIRECT ),
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m_intersectionsAllowed( true )
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{}
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bool POLYGON_GEOM_MANAGER::AddPoint( const VECTOR2I& aPt )
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{
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// if this is the first point, make sure the client is happy
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// for us to continue
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if( !IsPolygonInProgress() && !m_client.OnFirstPoint( *this ) )
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return false;
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if( m_leaderPts.PointCount() > 1 )
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{
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// there are enough leader points - the next
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// locked-in point is the end of the last leader
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// segment
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m_lockedPoints.Append( m_leaderPts.CPoint( -2 ) );
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m_lockedPoints.Append( m_leaderPts.CPoint( -1 ) );
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}
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else
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{
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// no leader lines, directly add the cursor
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m_lockedPoints.Append( aPt );
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}
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// check for self-intersections
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if( !m_intersectionsAllowed && IsSelfIntersecting( false ) )
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{
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m_lockedPoints.Remove( m_lockedPoints.PointCount() - 1 );
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return false;
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}
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if( m_lockedPoints.PointCount() > 0 )
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updateTemporaryLines( aPt );
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m_client.OnGeometryChange( *this );
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return true;
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}
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void POLYGON_GEOM_MANAGER::SetFinished()
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{
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m_client.OnComplete( *this );
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}
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void POLYGON_GEOM_MANAGER::SetLeaderMode( LEADER_MODE aMode )
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{
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m_leaderMode = aMode;
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}
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bool POLYGON_GEOM_MANAGER::IsSelfIntersecting( bool aIncludeLeaderPts ) const
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{
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SHAPE_LINE_CHAIN pts( m_lockedPoints );
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if( aIncludeLeaderPts )
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{
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for( int i = 0; i < m_leaderPts.PointCount(); ++i )
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{
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if( m_leaderPts.CPoint( i ) != pts.CPoint( 0 ) )
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pts.Append( m_leaderPts.CPoint( i ) );
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}
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}
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// line chain needs to be set as closed for proper checks
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pts.SetClosed( true );
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return !!pts.SelfIntersecting();
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}
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void POLYGON_GEOM_MANAGER::SetCursorPosition( const VECTOR2I& aPos )
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{
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updateTemporaryLines( aPos );
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}
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bool POLYGON_GEOM_MANAGER::IsPolygonInProgress() const
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{
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return m_lockedPoints.PointCount() > 0;
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}
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int POLYGON_GEOM_MANAGER::PolygonPointCount() const
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{
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return m_lockedPoints.PointCount();
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}
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bool POLYGON_GEOM_MANAGER::NewPointClosesOutline( const VECTOR2I& aPt ) const
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{
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return m_lockedPoints.PointCount() > 0 && m_lockedPoints.CPoint( 0 ) == aPt;
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}
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std::optional<VECTOR2I> POLYGON_GEOM_MANAGER::DeleteLastCorner()
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{
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std::optional<VECTOR2I> last;
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if( m_lockedPoints.PointCount() > 0 )
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{
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last = m_lockedPoints.GetPoint( m_lockedPoints.PointCount() - 1 );
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m_lockedPoints.Remove( m_lockedPoints.PointCount() - 1 );
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}
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// update the new last segment (was previously
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// locked in), reusing last constraints
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if( m_lockedPoints.PointCount() > 0 )
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updateTemporaryLines( m_leaderPts.CLastPoint() );
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m_client.OnGeometryChange( *this );
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return last;
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}
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void POLYGON_GEOM_MANAGER::Reset()
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{
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m_lockedPoints.Clear();
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m_leaderPts.Clear();
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m_loopPts.Clear();
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m_client.OnGeometryChange( *this );
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}
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static SHAPE_LINE_CHAIN build45DegLeader( const VECTOR2I& aEndPoint, SHAPE_LINE_CHAIN aLastPoints )
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{
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if( aLastPoints.PointCount() < 1 )
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return SHAPE_LINE_CHAIN();
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const VECTOR2I lastPt = aLastPoints.CPoint( -1 );
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const VECTOR2D endpointD = aEndPoint;
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const VECTOR2D lineVec = endpointD - lastPt;
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if( aLastPoints.SegmentCount() < 1 )
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return SHAPE_LINE_CHAIN(
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std::vector<VECTOR2I>{ lastPt, lastPt + GetVectorSnapped45( lineVec ) } );
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EDA_ANGLE lineA( lineVec );
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EDA_ANGLE prevA( GetVectorSnapped45( lastPt - aLastPoints.CPoint( -2 ) ) );
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bool vertical = std::abs( lineVec.y ) > std::abs( lineVec.x );
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bool horizontal = std::abs( lineVec.y ) < std::abs( lineVec.x );
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double angDiff = std::abs( ( lineA - prevA ).Normalize180().AsDegrees() );
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bool bendEnd = ( angDiff < 45 ) || ( angDiff > 90 && angDiff < 135 );
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if( prevA.Normalize90() == ANGLE_45 || prevA.Normalize90() == -ANGLE_45 )
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bendEnd = !bendEnd;
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VECTOR2D mid = endpointD;
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if( bendEnd )
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{
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if( vertical )
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{
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if( lineVec.y > 0 )
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mid = VECTOR2D( lastPt.x, endpointD.y - std::abs( lineVec.x ) );
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else
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mid = VECTOR2D( lastPt.x, endpointD.y + std::abs( lineVec.x ) );
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}
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else if( horizontal )
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{
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if( lineVec.x > 0 )
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mid = VECTOR2D( endpointD.x - std::abs( lineVec.y ), lastPt.y );
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else
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mid = VECTOR2D( endpointD.x + std::abs( lineVec.y ), lastPt.y );
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}
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}
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else
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{
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if( vertical )
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{
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if( lineVec.y > 0 )
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mid = VECTOR2D( endpointD.x, lastPt.y + std::abs( lineVec.x ) );
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else
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mid = VECTOR2D( endpointD.x, lastPt.y - std::abs( lineVec.x ) );
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}
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else if( horizontal )
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{
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if( lineVec.x > 0 )
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mid = VECTOR2D( lastPt.x + std::abs( lineVec.y ), endpointD.y );
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else
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mid = VECTOR2D( lastPt.x - std::abs( lineVec.y ), endpointD.y );
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}
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}
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const VECTOR2I midInt = { KiROUND( mid.x ), KiROUND( mid.y ) };
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return SHAPE_LINE_CHAIN( std::vector<VECTOR2I>{ lastPt, midInt, aEndPoint } );
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}
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void POLYGON_GEOM_MANAGER::updateTemporaryLines( const VECTOR2I& aEndPoint, LEADER_MODE aModifier )
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{
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wxCHECK( m_lockedPoints.PointCount() > 0, /*void*/ );
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const VECTOR2I& last_pt = m_lockedPoints.CLastPoint();
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if( m_leaderMode == LEADER_MODE::DEG45 || aModifier == LEADER_MODE::DEG45 )
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{
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if( m_lockedPoints.PointCount() > 0 )
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{
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m_leaderPts = build45DegLeader( aEndPoint, m_lockedPoints );
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m_loopPts = build45DegLeader( aEndPoint, m_lockedPoints.Reverse() ).Reverse();
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}
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}
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else
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{
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// direct segment
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m_leaderPts = SHAPE_LINE_CHAIN( { last_pt, aEndPoint } );
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m_loopPts.Clear();
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}
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m_client.OnGeometryChange( *this );
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}
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