1664 lines
44 KiB
C++
1664 lines
44 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) 2015-2017 CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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* @author Alejandro García Montoro <alejandro.garciamontoro@gmail.com>
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*
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* Point in polygon algorithm adapted from Clipper Library (C) Angus Johnson,
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* subject to Clipper library license.
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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 <vector>
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#include <cstdio>
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#include <set>
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#include <list>
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#include <algorithm>
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#include <common.h>
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#include <geometry/shape.h>
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#include <geometry/shape_line_chain.h>
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#include <geometry/shape_poly_set.h>
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using namespace ClipperLib;
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SHAPE_POLY_SET::SHAPE_POLY_SET() :
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SHAPE( SH_POLY_SET )
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{
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}
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SHAPE_POLY_SET::SHAPE_POLY_SET( const SHAPE_POLY_SET& aOther ) :
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SHAPE( SH_POLY_SET ), m_polys( aOther.m_polys )
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{
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}
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SHAPE_POLY_SET::~SHAPE_POLY_SET()
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{
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}
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SHAPE* SHAPE_POLY_SET::Clone() const
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{
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return new SHAPE_POLY_SET( *this );
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}
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bool SHAPE_POLY_SET::GetRelativeIndices( int aGlobalIdx,
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SHAPE_POLY_SET::VERTEX_INDEX* aRelativeIndices ) const
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{
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int polygonIdx = 0;
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unsigned int contourIdx = 0;
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int vertexIdx = 0;
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int currentGlobalIdx = 0;
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for( polygonIdx = 0; polygonIdx < OutlineCount(); polygonIdx++ )
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{
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const POLYGON currentPolygon = CPolygon( polygonIdx );
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for( contourIdx = 0; contourIdx < currentPolygon.size(); contourIdx++ )
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{
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SHAPE_LINE_CHAIN currentContour = currentPolygon[contourIdx];
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int totalPoints = currentContour.PointCount();
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for( vertexIdx = 0; vertexIdx < totalPoints; vertexIdx++ )
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{
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// Check if the current vertex is the globally indexed as aGlobalIdx
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if( currentGlobalIdx == aGlobalIdx )
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{
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aRelativeIndices->m_polygon = polygonIdx;
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aRelativeIndices->m_contour = contourIdx;
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aRelativeIndices->m_vertex = vertexIdx;
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return true;
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}
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// Advance
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currentGlobalIdx++;
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}
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}
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}
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return false;
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}
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bool SHAPE_POLY_SET::GetGlobalIndex( SHAPE_POLY_SET::VERTEX_INDEX aRelativeIndices,
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int& aGlobalIdx )
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{
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int selectedVertex = aRelativeIndices.m_vertex;
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unsigned int selectedContour = aRelativeIndices.m_contour;
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unsigned int selectedPolygon = aRelativeIndices.m_polygon;
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// Check whether the vertex indices make sense in this poly set
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if( selectedPolygon < m_polys.size() && selectedContour < m_polys[selectedPolygon].size() &&
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selectedVertex < m_polys[selectedPolygon][selectedContour].PointCount() )
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{
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POLYGON currentPolygon;
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aGlobalIdx = 0;
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for( unsigned int polygonIdx = 0; polygonIdx < selectedPolygon; polygonIdx++ )
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{
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currentPolygon = Polygon( polygonIdx );
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for( unsigned int contourIdx = 0; contourIdx < currentPolygon.size(); contourIdx++ )
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{
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aGlobalIdx += currentPolygon[contourIdx].PointCount();
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}
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}
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currentPolygon = Polygon( selectedPolygon );
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for( unsigned int contourIdx = 0; contourIdx < selectedContour; contourIdx ++ )
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{
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aGlobalIdx += currentPolygon[contourIdx].PointCount();
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}
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aGlobalIdx += selectedVertex;
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return true;
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}
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else
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{
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return false;
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}
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}
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int SHAPE_POLY_SET::NewOutline()
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{
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SHAPE_LINE_CHAIN empty_path;
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POLYGON poly;
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empty_path.SetClosed( true );
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poly.push_back( empty_path );
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m_polys.push_back( poly );
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return m_polys.size() - 1;
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}
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int SHAPE_POLY_SET::NewHole( int aOutline )
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{
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SHAPE_LINE_CHAIN empty_path;
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empty_path.SetClosed( true );
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// Default outline is the last one
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if( aOutline < 0 )
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aOutline += m_polys.size();
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// Add hole to the selected outline
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m_polys[aOutline].push_back( empty_path );
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return m_polys.back().size() - 2;
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}
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int SHAPE_POLY_SET::Append( int x, int y, int aOutline, int aHole, bool aAllowDuplication )
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{
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if( aOutline < 0 )
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aOutline += m_polys.size();
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int idx;
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if( aHole < 0 )
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idx = 0;
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else
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idx = aHole + 1;
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assert( aOutline < (int)m_polys.size() );
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assert( idx < (int)m_polys[aOutline].size() );
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m_polys[aOutline][idx].Append( x, y, aAllowDuplication );
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return m_polys[aOutline][idx].PointCount();
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}
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void SHAPE_POLY_SET::InsertVertex( int aGlobalIndex, VECTOR2I aNewVertex )
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{
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VERTEX_INDEX index;
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if( aGlobalIndex < 0 )
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aGlobalIndex = 0;
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if( aGlobalIndex >= TotalVertices() )
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{
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Append( aNewVertex );
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}
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else
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{
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// Assure the position to be inserted exists; throw an exception otherwise
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if( GetRelativeIndices( aGlobalIndex, &index ) )
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m_polys[index.m_polygon][index.m_contour].Insert( index.m_vertex, aNewVertex );
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else
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throw( std::out_of_range( "aGlobalIndex-th vertex does not exist" ) );
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}
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}
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int SHAPE_POLY_SET::VertexCount( int aOutline , int aHole ) const
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{
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if( aOutline < 0 )
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aOutline += m_polys.size();
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int idx;
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if( aHole < 0 )
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idx = 0;
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else
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idx = aHole + 1;
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assert ( aOutline < (int)m_polys.size() );
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assert ( idx < (int)m_polys[aOutline].size() );
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return m_polys[aOutline][idx].PointCount();
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}
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SHAPE_POLY_SET SHAPE_POLY_SET::Subset( int aFirstPolygon, int aLastPolygon )
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{
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assert( aFirstPolygon >= 0 && aLastPolygon <= OutlineCount() );
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SHAPE_POLY_SET newPolySet;
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for( int index = aFirstPolygon; index < aLastPolygon; index++ )
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{
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newPolySet.m_polys.push_back( Polygon( index ) );
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}
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return newPolySet;
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}
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VECTOR2I& SHAPE_POLY_SET::Vertex( int aIndex, int aOutline, int aHole )
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{
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if( aOutline < 0 )
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aOutline += m_polys.size();
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int idx;
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if( aHole < 0 )
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idx = 0;
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else
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idx = aHole + 1;
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assert( aOutline < (int)m_polys.size() );
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assert( idx < (int)m_polys[aOutline].size() );
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return m_polys[aOutline][idx].Point( aIndex );
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}
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const VECTOR2I& SHAPE_POLY_SET::CVertex( int aIndex, int aOutline, int aHole ) const
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{
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if( aOutline < 0 )
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aOutline += m_polys.size();
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int idx;
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if( aHole < 0 )
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idx = 0;
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else
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idx = aHole + 1;
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assert( aOutline < (int)m_polys.size() );
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assert( idx < (int)m_polys[aOutline].size() );
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return m_polys[aOutline][idx].CPoint( aIndex );
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}
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VECTOR2I& SHAPE_POLY_SET::Vertex( int aGlobalIndex )
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{
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SHAPE_POLY_SET::VERTEX_INDEX index;
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// Assure the passed index references a legal position; abort otherwise
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if( !GetRelativeIndices( aGlobalIndex, &index ) )
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throw( std::out_of_range( "aGlobalIndex-th vertex does not exist" ) );
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return m_polys[index.m_polygon][index.m_contour].Point( index.m_vertex );
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}
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const VECTOR2I& SHAPE_POLY_SET::CVertex( int aGlobalIndex ) const
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{
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SHAPE_POLY_SET::VERTEX_INDEX index;
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// Assure the passed index references a legal position; abort otherwise
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if( !GetRelativeIndices( aGlobalIndex, &index ) )
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throw( std::out_of_range( "aGlobalIndex-th vertex does not exist" ) );
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return m_polys[index.m_polygon][index.m_contour].CPoint( index.m_vertex );
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}
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VECTOR2I& SHAPE_POLY_SET::Vertex( SHAPE_POLY_SET::VERTEX_INDEX index )
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{
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return Vertex( index.m_vertex, index.m_polygon, index.m_contour - 1 );
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}
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const VECTOR2I& SHAPE_POLY_SET::CVertex( SHAPE_POLY_SET::VERTEX_INDEX index ) const
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{
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return CVertex( index.m_vertex, index.m_polygon, index.m_contour - 1 );
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}
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bool SHAPE_POLY_SET::GetNeighbourIndexes( int aGlobalIndex, int* aPrevious, int* aNext )
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{
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SHAPE_POLY_SET::VERTEX_INDEX index;
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// If the edge does not exist, throw an exception, it is an illegal access memory error
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if( !GetRelativeIndices( aGlobalIndex, &index ) )
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return false;
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// Calculate the previous and next index of aGlobalIndex, corresponding to
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// the same contour;
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VERTEX_INDEX inext = index;
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int lastpoint = m_polys[index.m_polygon][index.m_contour].SegmentCount();
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if( index.m_vertex == 0 )
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{
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index.m_vertex = lastpoint;
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inext.m_vertex = 1;
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}
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else if( index.m_vertex == lastpoint )
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{
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index.m_vertex--;
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inext.m_vertex = 0;
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}
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else
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{
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inext.m_vertex++;
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index.m_vertex--;
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}
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if( aPrevious )
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{
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int previous;
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GetGlobalIndex( index, previous );
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*aPrevious = previous;
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}
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if( aNext )
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{
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int next;
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GetGlobalIndex( inext, next );
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*aNext = next;
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}
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return true;
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}
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bool SHAPE_POLY_SET::IsPolygonSelfIntersecting( int aPolygonIndex )
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{
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// Get polygon
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const POLYGON poly = CPolygon( aPolygonIndex );
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SEGMENT_ITERATOR iterator = IterateSegmentsWithHoles( aPolygonIndex );
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SEGMENT_ITERATOR innerIterator;
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for( iterator = IterateSegmentsWithHoles( aPolygonIndex ); iterator; iterator++ )
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{
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SEG firstSegment = *iterator;
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// Iterate through all remaining segments.
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innerIterator = iterator;
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// Start in the next segment, we don't want to check collision between a segment and itself
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for( innerIterator++; innerIterator; innerIterator++ )
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{
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SEG secondSegment = *innerIterator;
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// Check whether the two segments built collide, only when they are not adjacent.
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if( !iterator.IsAdjacent( innerIterator ) && firstSegment.Collide( secondSegment, 0 ) )
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return true;
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}
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}
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return false;
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}
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bool SHAPE_POLY_SET::IsSelfIntersecting()
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{
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for( unsigned int polygon = 0; polygon < m_polys.size(); polygon++ )
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{
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if( IsPolygonSelfIntersecting( polygon ) )
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return true;
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}
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return false;
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}
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int SHAPE_POLY_SET::AddOutline( const SHAPE_LINE_CHAIN& aOutline )
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{
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assert( aOutline.IsClosed() );
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POLYGON poly;
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poly.push_back( aOutline );
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m_polys.push_back( poly );
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return m_polys.size() - 1;
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}
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int SHAPE_POLY_SET::AddHole( const SHAPE_LINE_CHAIN& aHole, int aOutline )
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{
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assert ( m_polys.size() );
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if( aOutline < 0 )
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aOutline += m_polys.size();
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POLYGON& poly = m_polys[aOutline];
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assert( poly.size() );
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poly.push_back( aHole );
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return poly.size() - 1;
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}
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const Path SHAPE_POLY_SET::convertToClipper( const SHAPE_LINE_CHAIN& aPath, bool aRequiredOrientation )
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{
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Path c_path;
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for( int i = 0; i < aPath.PointCount(); i++ )
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{
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const VECTOR2I& vertex = aPath.CPoint( i );
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c_path.push_back( IntPoint( vertex.x, vertex.y ) );
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}
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if( Orientation( c_path ) != aRequiredOrientation )
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ReversePath( c_path );
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return c_path;
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}
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const SHAPE_LINE_CHAIN SHAPE_POLY_SET::convertFromClipper( const Path& aPath )
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{
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SHAPE_LINE_CHAIN lc;
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for( unsigned int i = 0; i < aPath.size(); i++ )
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lc.Append( aPath[i].X, aPath[i].Y );
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lc.SetClosed( true );
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return lc;
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}
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void SHAPE_POLY_SET::booleanOp( ClipperLib::ClipType aType, const SHAPE_POLY_SET& aOtherShape,
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POLYGON_MODE aFastMode )
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{
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Clipper c;
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if( aFastMode == PM_STRICTLY_SIMPLE )
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c.StrictlySimple( true );
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for( const POLYGON& poly : m_polys )
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{
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for( unsigned int i = 0; i < poly.size(); i++ )
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c.AddPath( convertToClipper( poly[i], i > 0 ? false : true ), ptSubject, true );
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}
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for( const POLYGON& poly : aOtherShape.m_polys )
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{
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for( unsigned int i = 0; i < poly.size(); i++ )
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c.AddPath( convertToClipper( poly[i], i > 0 ? false : true ), ptClip, true );
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}
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PolyTree solution;
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c.Execute( aType, solution, pftNonZero, pftNonZero );
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importTree( &solution );
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}
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void SHAPE_POLY_SET::booleanOp( ClipperLib::ClipType aType,
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const SHAPE_POLY_SET& aShape,
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const SHAPE_POLY_SET& aOtherShape,
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POLYGON_MODE aFastMode )
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{
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Clipper c;
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if( aFastMode == PM_STRICTLY_SIMPLE )
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c.StrictlySimple( true );
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for( const POLYGON& poly : aShape.m_polys )
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{
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for( unsigned int i = 0; i < poly.size(); i++ )
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c.AddPath( convertToClipper( poly[i], i > 0 ? false : true ), ptSubject, true );
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}
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for( const POLYGON& poly : aOtherShape.m_polys )
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{
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for( unsigned int i = 0; i < poly.size(); i++ )
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c.AddPath( convertToClipper( poly[i], i > 0 ? false : true ), ptClip, true );
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}
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PolyTree solution;
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c.Execute( aType, solution, pftNonZero, pftNonZero );
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importTree( &solution );
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}
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void SHAPE_POLY_SET::BooleanAdd( const SHAPE_POLY_SET& b, POLYGON_MODE aFastMode )
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{
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booleanOp( ctUnion, b, aFastMode );
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}
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void SHAPE_POLY_SET::BooleanSubtract( const SHAPE_POLY_SET& b, POLYGON_MODE aFastMode )
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{
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booleanOp( ctDifference, b, aFastMode );
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}
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void SHAPE_POLY_SET::BooleanIntersection( const SHAPE_POLY_SET& b, POLYGON_MODE aFastMode )
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{
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booleanOp( ctIntersection, b, aFastMode );
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}
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void SHAPE_POLY_SET::BooleanAdd( const SHAPE_POLY_SET& a, const SHAPE_POLY_SET& b, POLYGON_MODE aFastMode )
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{
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booleanOp( ctUnion, a, b, aFastMode );
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}
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|
|
void SHAPE_POLY_SET::BooleanSubtract( const SHAPE_POLY_SET& a, const SHAPE_POLY_SET& b, POLYGON_MODE aFastMode )
|
|
{
|
|
booleanOp( ctDifference, a, b, aFastMode );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::BooleanIntersection( const SHAPE_POLY_SET& a, const SHAPE_POLY_SET& b, POLYGON_MODE aFastMode )
|
|
{
|
|
booleanOp( ctIntersection, a, b, aFastMode );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::Inflate( int aFactor, int aCircleSegmentsCount )
|
|
{
|
|
// A static table to avoid repetitive calculations of the coefficient
|
|
// 1.0 - cos( M_PI/aCircleSegmentsCount)
|
|
// aCircleSegmentsCount is most of time <= 64 and usually 8, 12, 16, 32
|
|
#define SEG_CNT_MAX 64
|
|
static double arc_tolerance_factor[SEG_CNT_MAX+1];
|
|
|
|
ClipperOffset c;
|
|
|
|
for( const POLYGON& poly : m_polys )
|
|
{
|
|
for( unsigned int i = 0; i < poly.size(); i++ )
|
|
c.AddPath( convertToClipper( poly[i], i > 0 ? false : true ), jtRound, etClosedPolygon );
|
|
}
|
|
|
|
PolyTree solution;
|
|
|
|
// Calculate the arc tolerance (arc error) from the seg count by circle.
|
|
// the seg count is nn = M_PI / acos(1.0 - c.ArcTolerance / abs(aFactor))
|
|
// see:
|
|
// www.angusj.com/delphi/clipper/documentation/Docs/Units/ClipperLib/Classes/ClipperOffset/Properties/ArcTolerance.htm
|
|
|
|
if( aCircleSegmentsCount < 6 ) // avoid incorrect aCircleSegmentsCount values
|
|
aCircleSegmentsCount = 6;
|
|
|
|
double coeff;
|
|
|
|
if( aCircleSegmentsCount > SEG_CNT_MAX || arc_tolerance_factor[aCircleSegmentsCount] == 0 )
|
|
{
|
|
coeff = 1.0 - cos( M_PI/aCircleSegmentsCount);
|
|
|
|
if( aCircleSegmentsCount <= SEG_CNT_MAX )
|
|
arc_tolerance_factor[aCircleSegmentsCount] = coeff;
|
|
}
|
|
else
|
|
coeff = arc_tolerance_factor[aCircleSegmentsCount];
|
|
|
|
c.ArcTolerance = std::abs( aFactor ) * coeff;
|
|
|
|
c.Execute( solution, aFactor );
|
|
|
|
importTree( &solution );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::importTree( PolyTree* tree )
|
|
{
|
|
m_polys.clear();
|
|
|
|
for( PolyNode* n = tree->GetFirst(); n; n = n->GetNext() )
|
|
{
|
|
if( !n->IsHole() )
|
|
{
|
|
POLYGON paths;
|
|
paths.reserve( n->Childs.size() + 1 );
|
|
paths.push_back( convertFromClipper( n->Contour ) );
|
|
|
|
for( unsigned int i = 0; i < n->Childs.size(); i++ )
|
|
paths.push_back( convertFromClipper( n->Childs[i]->Contour ) );
|
|
|
|
m_polys.push_back( paths );
|
|
}
|
|
}
|
|
}
|
|
|
|
// Polygon fracturing code. Work in progress.
|
|
|
|
struct FractureEdge
|
|
{
|
|
FractureEdge( bool connected, SHAPE_LINE_CHAIN* owner, int index ) :
|
|
m_connected( connected ),
|
|
m_next( NULL )
|
|
{
|
|
m_p1 = owner->CPoint( index );
|
|
m_p2 = owner->CPoint( index + 1 );
|
|
}
|
|
|
|
FractureEdge( int y = 0 ) :
|
|
m_connected( false ),
|
|
m_next( NULL )
|
|
{
|
|
m_p1.x = m_p2.y = y;
|
|
}
|
|
|
|
FractureEdge( bool connected, const VECTOR2I& p1, const VECTOR2I& p2 ) :
|
|
m_connected( connected ),
|
|
m_p1( p1 ),
|
|
m_p2( p2 ),
|
|
m_next( NULL )
|
|
{
|
|
}
|
|
|
|
bool matches( int y ) const
|
|
{
|
|
int y_min = std::min( m_p1.y, m_p2.y );
|
|
int y_max = std::max( m_p1.y, m_p2.y );
|
|
|
|
return ( y >= y_min ) && ( y <= y_max );
|
|
}
|
|
|
|
bool m_connected;
|
|
VECTOR2I m_p1, m_p2;
|
|
FractureEdge* m_next;
|
|
};
|
|
|
|
|
|
typedef std::vector<FractureEdge*> FractureEdgeSet;
|
|
|
|
|
|
static int processEdge( FractureEdgeSet& edges, FractureEdge* edge )
|
|
{
|
|
int x = edge->m_p1.x;
|
|
int y = edge->m_p1.y;
|
|
int min_dist = std::numeric_limits<int>::max();
|
|
int x_nearest = 0;
|
|
|
|
FractureEdge* e_nearest = NULL;
|
|
|
|
for( FractureEdgeSet::iterator i = edges.begin(); i != edges.end(); ++i )
|
|
{
|
|
if( !(*i)->matches( y ) )
|
|
continue;
|
|
|
|
int x_intersect;
|
|
|
|
if( (*i)->m_p1.y == (*i)->m_p2.y ) // horizontal edge
|
|
x_intersect = std::max ( (*i)->m_p1.x, (*i)->m_p2.x );
|
|
else
|
|
x_intersect = (*i)->m_p1.x + rescale((*i)->m_p2.x - (*i)->m_p1.x, y - (*i)->m_p1.y, (*i)->m_p2.y - (*i)->m_p1.y );
|
|
|
|
int dist = ( x - x_intersect );
|
|
|
|
if( dist >= 0 && dist < min_dist && (*i)->m_connected )
|
|
{
|
|
min_dist = dist;
|
|
x_nearest = x_intersect;
|
|
e_nearest = (*i);
|
|
}
|
|
}
|
|
|
|
if( e_nearest && e_nearest->m_connected )
|
|
{
|
|
int count = 0;
|
|
|
|
FractureEdge* lead1 = new FractureEdge( true, VECTOR2I( x_nearest, y ), VECTOR2I( x, y ) );
|
|
FractureEdge* lead2 = new FractureEdge( true, VECTOR2I( x, y ), VECTOR2I( x_nearest, y ) );
|
|
FractureEdge* split_2 = new FractureEdge( true, VECTOR2I( x_nearest, y ), e_nearest->m_p2 );
|
|
|
|
edges.push_back( split_2 );
|
|
edges.push_back( lead1 );
|
|
edges.push_back( lead2 );
|
|
|
|
FractureEdge* link = e_nearest->m_next;
|
|
|
|
e_nearest->m_p2 = VECTOR2I( x_nearest, y );
|
|
e_nearest->m_next = lead1;
|
|
lead1->m_next = edge;
|
|
|
|
FractureEdge*last;
|
|
for( last = edge; last->m_next != edge; last = last->m_next )
|
|
{
|
|
last->m_connected = true;
|
|
count++;
|
|
}
|
|
|
|
last->m_connected = true;
|
|
last->m_next = lead2;
|
|
lead2->m_next = split_2;
|
|
split_2->m_next = link;
|
|
|
|
return count + 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::fractureSingle( POLYGON& paths )
|
|
{
|
|
FractureEdgeSet edges;
|
|
FractureEdgeSet border_edges;
|
|
FractureEdge* root = NULL;
|
|
|
|
bool first = true;
|
|
|
|
if( paths.size() == 1 )
|
|
return;
|
|
|
|
int num_unconnected = 0;
|
|
|
|
for( SHAPE_LINE_CHAIN& path : paths )
|
|
{
|
|
int index = 0;
|
|
|
|
FractureEdge *prev = NULL, *first_edge = NULL;
|
|
|
|
int x_min = std::numeric_limits<int>::max();
|
|
|
|
for( int i = 0; i < path.PointCount(); i++ )
|
|
{
|
|
const VECTOR2I& p = path.CPoint( i );
|
|
|
|
if( p.x < x_min )
|
|
x_min = p.x;
|
|
}
|
|
|
|
for( int i = 0; i < path.PointCount(); i++ )
|
|
{
|
|
FractureEdge* fe = new FractureEdge( first, &path, index++ );
|
|
|
|
if( !root )
|
|
root = fe;
|
|
|
|
if( !first_edge )
|
|
first_edge = fe;
|
|
|
|
if( prev )
|
|
prev->m_next = fe;
|
|
|
|
if( i == path.PointCount() - 1 )
|
|
fe->m_next = first_edge;
|
|
|
|
prev = fe;
|
|
edges.push_back( fe );
|
|
|
|
if( !first )
|
|
{
|
|
if( fe->m_p1.x == x_min )
|
|
border_edges.push_back( fe );
|
|
}
|
|
|
|
if( !fe->m_connected )
|
|
num_unconnected++;
|
|
}
|
|
first = false; // first path is always the outline
|
|
}
|
|
|
|
// keep connecting holes to the main outline, until there's no holes left...
|
|
while( num_unconnected > 0 )
|
|
{
|
|
int x_min = std::numeric_limits<int>::max();
|
|
|
|
FractureEdge* smallestX = NULL;
|
|
|
|
// find the left-most hole edge and merge with the outline
|
|
for( FractureEdgeSet::iterator i = border_edges.begin(); i != border_edges.end(); ++i )
|
|
{
|
|
int xt = (*i)->m_p1.x;
|
|
|
|
if( ( xt < x_min ) && ! (*i)->m_connected )
|
|
{
|
|
x_min = xt;
|
|
smallestX = *i;
|
|
}
|
|
}
|
|
|
|
num_unconnected -= processEdge( edges, smallestX );
|
|
}
|
|
|
|
paths.clear();
|
|
SHAPE_LINE_CHAIN newPath;
|
|
|
|
newPath.SetClosed( true );
|
|
|
|
FractureEdge* e;
|
|
|
|
for( e = root; e->m_next != root; e = e->m_next )
|
|
newPath.Append( e->m_p1 );
|
|
|
|
newPath.Append( e->m_p1 );
|
|
|
|
for( FractureEdgeSet::iterator i = edges.begin(); i != edges.end(); ++i )
|
|
delete *i;
|
|
|
|
paths.push_back( newPath );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::Fracture( POLYGON_MODE aFastMode )
|
|
{
|
|
Simplify( aFastMode ); // remove overlapping holes/degeneracy
|
|
|
|
for( POLYGON& paths : m_polys )
|
|
{
|
|
fractureSingle( paths );
|
|
}
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::HasHoles() const
|
|
{
|
|
// Iterate through all the polygons on the set
|
|
for( const POLYGON& paths : m_polys )
|
|
{
|
|
// If any of them has more than one contour, it is a hole.
|
|
if( paths.size() > 1 )
|
|
return true;
|
|
}
|
|
|
|
// Return false if and only if every polygon has just one outline, without holes.
|
|
return false;
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::Simplify( POLYGON_MODE aFastMode )
|
|
{
|
|
SHAPE_POLY_SET empty;
|
|
|
|
booleanOp( ctUnion, empty, aFastMode );
|
|
}
|
|
|
|
|
|
int SHAPE_POLY_SET::NormalizeAreaOutlines()
|
|
{
|
|
// We are expecting only one main outline, but this main outline can have holes
|
|
// if holes: combine holes and remove them from the main outline.
|
|
// Note also we are using SHAPE_POLY_SET::PM_STRICTLY_SIMPLE in polygon
|
|
// calculations, but it is not mandatory. It is used mainly
|
|
// because there is usually only very few vertices in area outlines
|
|
SHAPE_POLY_SET::POLYGON& outline = Polygon( 0 );
|
|
SHAPE_POLY_SET holesBuffer;
|
|
|
|
// Move holes stored in outline to holesBuffer:
|
|
// The first SHAPE_LINE_CHAIN is the main outline, others are holes
|
|
while( outline.size() > 1 )
|
|
{
|
|
holesBuffer.AddOutline( outline.back() );
|
|
outline.pop_back();
|
|
}
|
|
|
|
Simplify( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
|
|
|
|
// If any hole, substract it to main outline
|
|
if( holesBuffer.OutlineCount() )
|
|
{
|
|
holesBuffer.Simplify( SHAPE_POLY_SET::PM_FAST);
|
|
BooleanSubtract( holesBuffer, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
|
|
}
|
|
|
|
RemoveNullSegments();
|
|
|
|
return OutlineCount();
|
|
}
|
|
|
|
|
|
const std::string SHAPE_POLY_SET::Format() const
|
|
{
|
|
std::stringstream ss;
|
|
|
|
ss << "polyset " << m_polys.size() << "\n";
|
|
|
|
for( unsigned i = 0; i < m_polys.size(); i++ )
|
|
{
|
|
ss << "poly " << m_polys[i].size() << "\n";
|
|
for( unsigned j = 0; j < m_polys[i].size(); j++ )
|
|
{
|
|
ss << m_polys[i][j].PointCount() << "\n";
|
|
for( int v = 0; v < m_polys[i][j].PointCount(); v++ )
|
|
ss << m_polys[i][j].CPoint( v ).x << " " << m_polys[i][j].CPoint( v ).y << "\n";
|
|
}
|
|
ss << "\n";
|
|
}
|
|
|
|
return ss.str();
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::Parse( std::stringstream& aStream )
|
|
{
|
|
std::string tmp;
|
|
|
|
aStream >> tmp;
|
|
|
|
if( tmp != "polyset" )
|
|
return false;
|
|
|
|
aStream >> tmp;
|
|
|
|
int n_polys = atoi( tmp.c_str() );
|
|
|
|
if( n_polys < 0 )
|
|
return false;
|
|
|
|
for( int i = 0; i < n_polys; i++ )
|
|
{
|
|
POLYGON paths;
|
|
|
|
aStream >> tmp;
|
|
|
|
if( tmp != "poly" )
|
|
return false;
|
|
|
|
aStream >> tmp;
|
|
int n_outlines = atoi( tmp.c_str() );
|
|
|
|
if( n_outlines < 0 )
|
|
return false;
|
|
|
|
for( int j = 0; j < n_outlines; j++ )
|
|
{
|
|
SHAPE_LINE_CHAIN outline;
|
|
|
|
outline.SetClosed( true );
|
|
|
|
aStream >> tmp;
|
|
int n_vertices = atoi( tmp.c_str() );
|
|
for( int v = 0; v < n_vertices; v++ )
|
|
{
|
|
VECTOR2I p;
|
|
|
|
aStream >> tmp; p.x = atoi( tmp.c_str() );
|
|
aStream >> tmp; p.y = atoi( tmp.c_str() );
|
|
outline.Append( p );
|
|
}
|
|
|
|
paths.push_back( outline );
|
|
}
|
|
|
|
m_polys.push_back( paths );
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
const BOX2I SHAPE_POLY_SET::BBox( int aClearance ) const
|
|
{
|
|
BOX2I bb;
|
|
|
|
for( unsigned i = 0; i < m_polys.size(); i++ )
|
|
{
|
|
if( i == 0 )
|
|
bb = m_polys[i][0].BBox();
|
|
else
|
|
bb.Merge( m_polys[i][0].BBox() );
|
|
}
|
|
|
|
bb.Inflate( aClearance );
|
|
return bb;
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::PointOnEdge( const VECTOR2I& aP ) const
|
|
{
|
|
// Iterate through all the polygons in the set
|
|
for( const POLYGON& polygon : m_polys )
|
|
{
|
|
// Iterate through all the line chains in the polygon
|
|
for( const SHAPE_LINE_CHAIN& lineChain : polygon )
|
|
{
|
|
if( lineChain.PointOnEdge( aP ) )
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::Collide( const VECTOR2I& aP, int aClearance ) const
|
|
{
|
|
SHAPE_POLY_SET polySet = SHAPE_POLY_SET( *this );
|
|
|
|
// Inflate the polygon if necessary.
|
|
if( aClearance > 0 )
|
|
{
|
|
// fixme: the number of arc segments should not be hardcoded
|
|
polySet.Inflate( aClearance, 8 );
|
|
}
|
|
|
|
// There is a collision if and only if the point is inside of the polygon.
|
|
return polySet.Contains( aP );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::RemoveAllContours()
|
|
{
|
|
m_polys.clear();
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::RemoveContour( int aContourIdx, int aPolygonIdx )
|
|
{
|
|
// Default polygon is the last one
|
|
if( aPolygonIdx < 0 )
|
|
aPolygonIdx += m_polys.size();
|
|
|
|
m_polys[aPolygonIdx].erase( m_polys[aPolygonIdx].begin() + aContourIdx );
|
|
}
|
|
|
|
|
|
int SHAPE_POLY_SET::RemoveNullSegments()
|
|
{
|
|
int removed = 0;
|
|
|
|
ITERATOR iterator = IterateWithHoles();
|
|
|
|
VECTOR2I contourStart = *iterator;
|
|
VECTOR2I segmentStart, segmentEnd;
|
|
|
|
VERTEX_INDEX indexStart;
|
|
|
|
while( iterator )
|
|
{
|
|
// Obtain first point and its index
|
|
segmentStart = *iterator;
|
|
indexStart = iterator.GetIndex();
|
|
|
|
// Obtain last point
|
|
if( iterator.IsEndContour() )
|
|
{
|
|
segmentEnd = contourStart;
|
|
|
|
// Advance
|
|
iterator++;
|
|
|
|
if( iterator )
|
|
contourStart = *iterator;
|
|
}
|
|
else
|
|
{
|
|
// Advance
|
|
iterator++;
|
|
|
|
if( iterator )
|
|
segmentEnd = *iterator;
|
|
}
|
|
|
|
// Remove segment start if both points are equal
|
|
if( segmentStart == segmentEnd )
|
|
{
|
|
RemoveVertex( indexStart );
|
|
removed++;
|
|
|
|
// Advance the iterator one position, as there is one vertex less.
|
|
if( iterator )
|
|
iterator++;
|
|
}
|
|
}
|
|
|
|
return removed;
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::DeletePolygon( int aIdx )
|
|
{
|
|
m_polys.erase( m_polys.begin() + aIdx );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::Append( const SHAPE_POLY_SET& aSet )
|
|
{
|
|
m_polys.insert( m_polys.end(), aSet.m_polys.begin(), aSet.m_polys.end() );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::Append( const VECTOR2I& aP, int aOutline, int aHole )
|
|
{
|
|
Append( aP.x, aP.y, aOutline, aHole );
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::CollideVertex( const VECTOR2I& aPoint,
|
|
SHAPE_POLY_SET::VERTEX_INDEX& aClosestVertex, int aClearance )
|
|
{
|
|
// Shows whether there was a collision
|
|
bool collision = false;
|
|
|
|
// Difference vector between each vertex and aPoint.
|
|
VECTOR2D delta;
|
|
double distance, clearance;
|
|
|
|
// Convert clearance to double for precission when comparing distances
|
|
clearance = aClearance;
|
|
|
|
for( ITERATOR iterator = IterateWithHoles(); iterator; iterator++ )
|
|
{
|
|
// Get the difference vector between current vertex and aPoint
|
|
delta = *iterator - aPoint;
|
|
|
|
// Compute distance
|
|
distance = delta.EuclideanNorm();
|
|
|
|
// Check for collisions
|
|
if( distance <= clearance )
|
|
{
|
|
collision = true;
|
|
|
|
// Update aClearance to look for closer vertices
|
|
clearance = distance;
|
|
|
|
// Store the indices that identify the vertex
|
|
aClosestVertex = iterator.GetIndex();
|
|
}
|
|
}
|
|
|
|
return collision;
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::CollideEdge( const VECTOR2I& aPoint,
|
|
SHAPE_POLY_SET::VERTEX_INDEX& aClosestVertex, int aClearance )
|
|
{
|
|
// Shows whether there was a collision
|
|
bool collision = false;
|
|
|
|
SEGMENT_ITERATOR iterator;
|
|
|
|
for( iterator = IterateSegmentsWithHoles(); iterator; iterator++ )
|
|
{
|
|
SEG currentSegment = *iterator;
|
|
int distance = currentSegment.Distance( aPoint );
|
|
|
|
// Check for collisions
|
|
if( distance <= aClearance )
|
|
{
|
|
collision = true;
|
|
|
|
// Update aClearance to look for closer edges
|
|
aClearance = distance;
|
|
|
|
// Store the indices that identify the vertex
|
|
aClosestVertex = iterator.GetIndex();
|
|
}
|
|
}
|
|
|
|
return collision;
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::Contains( const VECTOR2I& aP, int aSubpolyIndex ) const
|
|
{
|
|
if( m_polys.size() == 0 ) // empty set?
|
|
return false;
|
|
|
|
// If there is a polygon specified, check the condition against that polygon
|
|
if( aSubpolyIndex >= 0 )
|
|
return containsSingle( aP, aSubpolyIndex );
|
|
|
|
// In any other case, check it against all polygons in the set
|
|
for( int polygonIdx = 0; polygonIdx < OutlineCount(); polygonIdx++ )
|
|
{
|
|
if( containsSingle( aP, polygonIdx ) )
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::RemoveVertex( int aGlobalIndex )
|
|
{
|
|
VERTEX_INDEX index;
|
|
|
|
// Assure the to be removed vertex exists, abort otherwise
|
|
if( GetRelativeIndices( aGlobalIndex, &index ) )
|
|
RemoveVertex( index );
|
|
else
|
|
throw( std::out_of_range( "aGlobalIndex-th vertex does not exist" ) );
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::RemoveVertex( VERTEX_INDEX aIndex )
|
|
{
|
|
m_polys[aIndex.m_polygon][aIndex.m_contour].Remove( aIndex.m_vertex );
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::containsSingle( const VECTOR2I& aP, int aSubpolyIndex ) const
|
|
{
|
|
// Check that the point is inside the outline
|
|
if( pointInPolygon( aP, m_polys[aSubpolyIndex][0] ) )
|
|
{
|
|
// Check that the point is not in any of the holes
|
|
for( int holeIdx = 0; holeIdx < HoleCount( aSubpolyIndex ); holeIdx++ )
|
|
{
|
|
const SHAPE_LINE_CHAIN hole = CHole( aSubpolyIndex, holeIdx );
|
|
// If the point is inside a hole (and not on its edge),
|
|
// it is outside of the polygon
|
|
if( pointInPolygon( aP, hole ) && !hole.PointOnEdge( aP ) )
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::pointInPolygon( const VECTOR2I& aP, const SHAPE_LINE_CHAIN& aPath ) const
|
|
{
|
|
int result = 0;
|
|
int cnt = aPath.PointCount();
|
|
|
|
if ( !aPath.BBox().Contains( aP ) ) // test with bounding box first
|
|
return false;
|
|
|
|
if( cnt < 3 )
|
|
return false;
|
|
|
|
VECTOR2I ip = aPath.CPoint( 0 );
|
|
|
|
for( int i = 1; i <= cnt; ++i )
|
|
{
|
|
VECTOR2I ipNext = ( i == cnt ? aPath.CPoint( 0 ) : aPath.CPoint( i ) );
|
|
|
|
if( ipNext.y == aP.y )
|
|
{
|
|
if( ( ipNext.x == aP.x ) || ( ip.y == aP.y &&
|
|
( ( ipNext.x > aP.x ) == ( ip.x < aP.x ) ) ) )
|
|
return true;
|
|
}
|
|
|
|
if( ( ip.y < aP.y ) != ( ipNext.y < aP.y ) )
|
|
{
|
|
if( ip.x >= aP.x )
|
|
{
|
|
if( ipNext.x > aP.x )
|
|
result = 1 - result;
|
|
else
|
|
{
|
|
int64_t d = (int64_t)( ip.x - aP.x ) * (int64_t)( ipNext.y - aP.y ) -
|
|
(int64_t)( ipNext.x - aP.x ) * (int64_t)( ip.y - aP.y );
|
|
|
|
if( !d )
|
|
return true;
|
|
|
|
if( ( d > 0 ) == ( ipNext.y > ip.y ) )
|
|
result = 1 - result;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( ipNext.x > aP.x )
|
|
{
|
|
int64_t d = (int64_t)( ip.x - aP.x ) * (int64_t)( ipNext.y - aP.y ) -
|
|
(int64_t)( ipNext.x - aP.x ) * (int64_t)( ip.y - aP.y );
|
|
|
|
if( !d )
|
|
return true;
|
|
|
|
if( ( d > 0 ) == ( ipNext.y > ip.y ) )
|
|
result = 1 - result;
|
|
}
|
|
}
|
|
}
|
|
|
|
ip = ipNext;
|
|
}
|
|
|
|
return result ? true : false;
|
|
}
|
|
|
|
|
|
void SHAPE_POLY_SET::Move( const VECTOR2I& aVector )
|
|
{
|
|
for( POLYGON &poly : m_polys )
|
|
{
|
|
for( SHAPE_LINE_CHAIN &path : poly )
|
|
{
|
|
path.Move( aVector );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int SHAPE_POLY_SET::TotalVertices() const
|
|
{
|
|
int c = 0;
|
|
|
|
for( const POLYGON& poly : m_polys )
|
|
{
|
|
for( const SHAPE_LINE_CHAIN& path : poly )
|
|
{
|
|
c += path.PointCount();
|
|
}
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
|
|
SHAPE_POLY_SET::POLYGON SHAPE_POLY_SET::ChamferPolygon( unsigned int aDistance, int aIndex )
|
|
{
|
|
return chamferFilletPolygon( CORNER_MODE::CHAMFERED, aDistance, aIndex );
|
|
}
|
|
|
|
|
|
SHAPE_POLY_SET::POLYGON SHAPE_POLY_SET::FilletPolygon( unsigned int aRadius,
|
|
unsigned int aSegments,
|
|
int aIndex )
|
|
{
|
|
return chamferFilletPolygon(CORNER_MODE::FILLETED, aRadius, aIndex, aSegments );
|
|
}
|
|
|
|
|
|
int SHAPE_POLY_SET::DistanceToPolygon( VECTOR2I aPoint, int aPolygonIndex )
|
|
{
|
|
// We calculate the min dist between the segment and each outline segment
|
|
// However, if the segment to test is inside the outline, and does not cross
|
|
// any edge, it can be seen outside the polygon.
|
|
// Therefore test if a segment end is inside ( testing only one end is enough )
|
|
if( containsSingle( aPoint, aPolygonIndex ) )
|
|
return 0;
|
|
|
|
SEGMENT_ITERATOR iterator = IterateSegmentsWithHoles( aPolygonIndex );
|
|
|
|
SEG polygonEdge = *iterator;
|
|
int minDistance = polygonEdge.Distance( aPoint );
|
|
|
|
for( iterator++; iterator && minDistance > 0; iterator++ )
|
|
{
|
|
polygonEdge = *iterator;
|
|
|
|
int currentDistance = polygonEdge.Distance( aPoint );
|
|
|
|
if( currentDistance < minDistance )
|
|
minDistance = currentDistance;
|
|
}
|
|
|
|
return minDistance;
|
|
}
|
|
|
|
|
|
int SHAPE_POLY_SET::DistanceToPolygon( SEG aSegment, int aPolygonIndex, int aSegmentWidth )
|
|
{
|
|
// We calculate the min dist between the segment and each outline segment
|
|
// However, if the segment to test is inside the outline, and does not cross
|
|
// any edge, it can be seen outside the polygon.
|
|
// Therefore test if a segment end is inside ( testing only one end is enough )
|
|
if( containsSingle( aSegment.A, aPolygonIndex ) )
|
|
return 0;
|
|
|
|
SEGMENT_ITERATOR iterator = IterateSegmentsWithHoles( aPolygonIndex );
|
|
|
|
SEG polygonEdge = *iterator;
|
|
int minDistance = polygonEdge.Distance( aSegment );
|
|
|
|
for( iterator++; iterator && minDistance > 0; iterator++ )
|
|
{
|
|
polygonEdge = *iterator;
|
|
|
|
int currentDistance = polygonEdge.Distance( aSegment );
|
|
|
|
if( currentDistance < minDistance )
|
|
minDistance = currentDistance;
|
|
}
|
|
|
|
// Take into account the width of the segment
|
|
if( aSegmentWidth > 0 )
|
|
minDistance -= aSegmentWidth/2;
|
|
|
|
// Return the maximum of minDistance and zero
|
|
return minDistance < 0 ? 0 : minDistance;
|
|
}
|
|
|
|
|
|
int SHAPE_POLY_SET::Distance( VECTOR2I aPoint )
|
|
{
|
|
int currentDistance;
|
|
int minDistance = DistanceToPolygon( aPoint, 0 );
|
|
|
|
// Iterate through all the polygons and get the minimum distance.
|
|
for( unsigned int polygonIdx = 1; polygonIdx < m_polys.size(); polygonIdx++ )
|
|
{
|
|
currentDistance = DistanceToPolygon( aPoint, polygonIdx );
|
|
|
|
if( currentDistance < minDistance )
|
|
minDistance = currentDistance;
|
|
}
|
|
|
|
return minDistance;
|
|
}
|
|
|
|
|
|
int SHAPE_POLY_SET::Distance( SEG aSegment, int aSegmentWidth )
|
|
{
|
|
int currentDistance;
|
|
int minDistance = DistanceToPolygon( aSegment, 0 );
|
|
|
|
// Iterate through all the polygons and get the minimum distance.
|
|
for( unsigned int polygonIdx = 1; polygonIdx < m_polys.size(); polygonIdx++ )
|
|
{
|
|
currentDistance = DistanceToPolygon( aSegment, polygonIdx, aSegmentWidth );
|
|
|
|
if( currentDistance < minDistance )
|
|
minDistance = currentDistance;
|
|
}
|
|
|
|
return minDistance;
|
|
}
|
|
|
|
|
|
bool SHAPE_POLY_SET::IsVertexInHole( int aGlobalIdx )
|
|
{
|
|
VERTEX_INDEX index;
|
|
|
|
// Get the polygon and contour where the vertex is. If the vertex does not exist, return false
|
|
if( !GetRelativeIndices( aGlobalIdx, &index ) )
|
|
return false;
|
|
|
|
// The contour is a hole if its index is greater than zero
|
|
return index.m_contour > 0;
|
|
}
|
|
|
|
|
|
SHAPE_POLY_SET SHAPE_POLY_SET::Chamfer( int aDistance )
|
|
{
|
|
SHAPE_POLY_SET chamfered;
|
|
|
|
for( unsigned int polygonIdx = 0; polygonIdx < m_polys.size(); polygonIdx++ )
|
|
chamfered.m_polys.push_back( ChamferPolygon( aDistance, polygonIdx ) );
|
|
|
|
return chamfered;
|
|
}
|
|
|
|
|
|
SHAPE_POLY_SET SHAPE_POLY_SET::Fillet( int aRadius, int aSegments )
|
|
{
|
|
SHAPE_POLY_SET filleted;
|
|
|
|
for( size_t polygonIdx = 0; polygonIdx < m_polys.size(); polygonIdx++ )
|
|
filleted.m_polys.push_back( FilletPolygon( aRadius, aSegments, polygonIdx ) );
|
|
|
|
return filleted;
|
|
}
|
|
|
|
|
|
SHAPE_POLY_SET::POLYGON SHAPE_POLY_SET::chamferFilletPolygon( CORNER_MODE aMode,
|
|
unsigned int aDistance,
|
|
int aIndex,
|
|
int aSegments )
|
|
{
|
|
// Null segments create serious issues in calculations. Remove them:
|
|
RemoveNullSegments();
|
|
|
|
SHAPE_POLY_SET::POLYGON currentPoly = Polygon( aIndex );
|
|
SHAPE_POLY_SET::POLYGON newPoly;
|
|
|
|
// If the chamfering distance is zero, then the polygon remain intact.
|
|
if( aDistance == 0 )
|
|
{
|
|
return currentPoly;
|
|
}
|
|
|
|
// Iterate through all the contours (outline and holes) of the polygon.
|
|
for( SHAPE_LINE_CHAIN &currContour : currentPoly )
|
|
{
|
|
// Generate a new contour in the new polygon
|
|
SHAPE_LINE_CHAIN newContour;
|
|
|
|
// Iterate through the vertices of the contour
|
|
for( int currVertex = 0; currVertex < currContour.PointCount(); currVertex++ )
|
|
{
|
|
// Current vertex
|
|
int x1 = currContour.Point( currVertex ).x;
|
|
int y1 = currContour.Point( currVertex ).y;
|
|
|
|
// Indices for previous and next vertices.
|
|
int prevVertex;
|
|
int nextVertex;
|
|
|
|
// Previous and next vertices indices computation. Necessary to manage the edge cases.
|
|
|
|
// Previous vertex is the last one if the current vertex is the first one
|
|
prevVertex = currVertex == 0 ? currContour.PointCount() - 1 : currVertex - 1;
|
|
|
|
// next vertex is the first one if the current vertex is the last one.
|
|
nextVertex = currVertex == currContour.PointCount() - 1 ? 0 : currVertex + 1;
|
|
|
|
// Previous vertex computation
|
|
double xa = currContour.Point( prevVertex ).x - x1;
|
|
double ya = currContour.Point( prevVertex ).y - y1;
|
|
|
|
// Next vertex computation
|
|
double xb = currContour.Point( nextVertex ).x - x1;
|
|
double yb = currContour.Point( nextVertex ).y - y1;
|
|
|
|
// Compute the new distances
|
|
double lena = hypot( xa, ya );
|
|
double lenb = hypot( xb, yb );
|
|
|
|
// Make the final computations depending on the mode selected, chamfered or filleted.
|
|
if( aMode == CORNER_MODE::CHAMFERED )
|
|
{
|
|
double distance = aDistance;
|
|
|
|
// Chamfer one half of an edge at most
|
|
if( 0.5 * lena < distance )
|
|
distance = 0.5 * lena;
|
|
|
|
if( 0.5 * lenb < distance )
|
|
distance = 0.5 * lenb;
|
|
|
|
int nx1 = KiROUND( distance * xa / lena );
|
|
int ny1 = KiROUND( distance * ya / lena );
|
|
|
|
newContour.Append( x1 + nx1, y1 + ny1 );
|
|
|
|
int nx2 = KiROUND( distance * xb / lenb );
|
|
int ny2 = KiROUND( distance * yb / lenb );
|
|
|
|
newContour.Append( x1 + nx2, y1 + ny2 );
|
|
}
|
|
else // CORNER_MODE = FILLETED
|
|
{
|
|
double cosine = ( xa * xb + ya * yb ) / ( lena * lenb );
|
|
|
|
double radius = aDistance;
|
|
double denom = sqrt( 2.0 / ( 1 + cosine ) - 1 );
|
|
|
|
// Do nothing in case of parallel edges
|
|
if( std::isinf( denom ) )
|
|
continue;
|
|
|
|
// Limit rounding distance to one half of an edge
|
|
if( 0.5 * lena * denom < radius )
|
|
radius = 0.5 * lena * denom;
|
|
|
|
if( 0.5 * lenb * denom < radius )
|
|
radius = 0.5 * lenb * denom;
|
|
|
|
// Calculate fillet arc absolute center point (xc, yx)
|
|
double k = radius / sqrt( .5 * ( 1 - cosine ) );
|
|
double lenab = sqrt( ( xa / lena + xb / lenb ) * ( xa / lena + xb / lenb ) +
|
|
( ya / lena + yb / lenb ) * ( ya / lena + yb / lenb ) );
|
|
double xc = x1 + k * ( xa / lena + xb / lenb ) / lenab;
|
|
double yc = y1 + k * ( ya / lena + yb / lenb ) / lenab;
|
|
|
|
// Calculate arc start and end vectors
|
|
k = radius / sqrt( 2 / ( 1 + cosine ) - 1 );
|
|
double xs = x1 + k * xa / lena - xc;
|
|
double ys = y1 + k * ya / lena - yc;
|
|
double xe = x1 + k * xb / lenb - xc;
|
|
double ye = y1 + k * yb / lenb - yc;
|
|
|
|
// Cosine of arc angle
|
|
double argument = ( xs * xe + ys * ye ) / ( radius * radius );
|
|
|
|
// Make sure the argument is in [-1,1], interval in which the acos function is
|
|
// defined
|
|
if( argument < -1 )
|
|
argument = -1;
|
|
else if( argument > 1 )
|
|
argument = 1;
|
|
|
|
double arcAngle = acos( argument );
|
|
|
|
// Calculate the number of segments
|
|
unsigned int segments = ceil( (double) aSegments * ( arcAngle / ( 2 * M_PI ) ) );
|
|
|
|
double deltaAngle = arcAngle / segments;
|
|
double startAngle = atan2( -ys, xs );
|
|
|
|
// Flip arc for inner corners
|
|
if( xa * yb - ya * xb <= 0 )
|
|
deltaAngle *= -1;
|
|
|
|
double nx = xc + xs;
|
|
double ny = yc + ys;
|
|
|
|
newContour.Append( KiROUND( nx ), KiROUND( ny ) );
|
|
|
|
// Store the previous added corner to make a sanity check
|
|
int prevX = KiROUND( nx );
|
|
int prevY = KiROUND( ny );
|
|
|
|
for( unsigned int j = 0; j < segments; j++ )
|
|
{
|
|
nx = xc + cos( startAngle + (j + 1) * deltaAngle ) * radius;
|
|
ny = yc - sin( startAngle + (j + 1) * deltaAngle ) * radius;
|
|
|
|
// Sanity check: the rounding can produce repeated corners; do not add them.
|
|
if( KiROUND( nx ) != prevX || KiROUND( ny ) != prevY )
|
|
{
|
|
newContour.Append( KiROUND( nx ), KiROUND( ny ) );
|
|
prevX = KiROUND( nx );
|
|
prevY = KiROUND( ny );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Close the current contour and add it the new polygon
|
|
newContour.SetClosed( true );
|
|
newPoly.push_back( newContour );
|
|
}
|
|
|
|
return newPoly;
|
|
}
|