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95 lines
3.1 KiB
95 lines
3.1 KiB
/*
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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) 2009-2014 Jean-Pierre Charras, jp.charras at wanadoo.fr
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* Copyright (C) 1992-2017 KiCad Developers, see CHANGELOG.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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#ifndef BEZIER_CURVES_H
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#define BEZIER_CURVES_H
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#include <vector>
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#include <wx/gdicmn.h>
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/**
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* Bezier curves to polygon converter.
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*/
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class BEZIER_POLY
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{
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public:
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BEZIER_POLY( int x1, int y1, int x2, int y2, int x3, int y3 )
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{
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m_ctrlPts.emplace_back( x1, y1 );
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m_ctrlPts.emplace_back( x2, y2 );
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m_ctrlPts.emplace_back( x3, y3 );
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m_output = nullptr;
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}
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BEZIER_POLY( int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4 )
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{
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m_ctrlPts.emplace_back( x1, y1 );
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m_ctrlPts.emplace_back( x2, y2 );
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m_ctrlPts.emplace_back( x3, y3 );
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m_ctrlPts.emplace_back( x4, y4 );
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m_output = nullptr;
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}
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BEZIER_POLY( const std::vector<wxPoint>& aControlPoints )
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: m_ctrlPts( aControlPoints )
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{
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m_output = nullptr;
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}
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/**
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* Converts Bezier curve to a polygon.
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* @param aOutput will be used as an output vector storing polygon points.
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*/
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void GetPoly( std::vector<wxPoint>& aOutput );
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private:
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///> Control points
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std::vector<wxPoint> m_ctrlPts;
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///> Pointer to the output vector
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std::vector<wxPoint>* m_output;
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void addSegment( const wxPoint& aSegment )
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{
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if( m_output->back() != aSegment )
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m_output->push_back( aSegment );
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}
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void recursiveBezier( int x1, int y1, int x2, int y2, int x3, int y3, unsigned int level );
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void recursiveBezier( int x1, int y1, int x2, int y2,
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int x3, int y3, int x4, int y4, unsigned int level );
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// Conversion parameters
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constexpr static double angle_tolerance = 0.0;
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constexpr static double cusp_limit = 0.0;
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constexpr static unsigned int recursion_limit = 12;
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constexpr static double approximation_scale = 0.5; // 1
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constexpr static double distance_tolerance_square = ( 0.5 / approximation_scale ) * ( 0.5 / approximation_scale );
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constexpr static double curve_collinearity_epsilon = 1e-30;
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constexpr static double curve_angle_tolerance_epsilon = 0.0001;
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};
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#endif // BEZIER_CURVES_H
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