easyeda_parser_base.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2023 Alex Shvartzkop <[email protected]>
 * Copyright (C) 2023 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include "easyeda_parser_base.h"
 
#include <bezier_curves.h>
#include <ki_exception.h>
#include <wx/translation.h>
 
 
double EASYEDA_PARSER_BASE::Convert( const wxString& aValue )
{
 double value = 0;
 
 if( !aValue.ToCDouble( &value ) )
 THROW_IO_ERROR( wxString::Format( _( "Failed to parse number from '%s'" ), aValue ) );
 
 return value;
}
 
 
double EASYEDA_PARSER_BASE::RelPosX( double aValue )
{
 double value = aValue - m_relOrigin.x;
 return ScaleSize( value );
}
 
 
double EASYEDA_PARSER_BASE::RelPosY( double aValue )
{
 double value = aValue - m_relOrigin.y;
 return ScaleSize( value );
}
 
 
double EASYEDA_PARSER_BASE::RelPosX( const wxString& aValue )
{
 return RelPosX( Convert( aValue ) );
}
 
 
double EASYEDA_PARSER_BASE::RelPosY( const wxString& aValue )
{
 return RelPosY( Convert( aValue ) );
}
 
 
std::vector<SHAPE_LINE_CHAIN> EASYEDA_PARSER_BASE::ParseLineChains( const wxString& data,
 int aArcMinSegLen )
{
 std::vector<SHAPE_LINE_CHAIN> result;
 
 VECTOR2D prevPt;
 SHAPE_LINE_CHAIN chain;
 
 size_t pos = 0;
 auto readNumber = [&]( wxString& aOut )
 {
 wxUniChar ch = data[pos];
 
 while( ch == ' ' || ch == ',' )
 ch = data[++pos];
 
 while( isdigit( ch ) || ch == '.' || ch == '-' )
 {
 aOut += ch;
 pos++;
 
 if( pos == data.size() )
 break;
 
 ch = data[pos];
 }
 };
 
 do
 {
 wxUniChar sym = data[pos++];
 
 if( sym == ' ' )
 continue;
 
 if( sym == 'M' )
 {
 wxString xStr, yStr;
 
 readNumber( xStr );
 readNumber( yStr );
 
 if( chain.PointCount() > 2 )
 {
 chain.SetClosed( true );
 result.emplace_back( chain );
 }
 
 chain.Clear();
 
 VECTOR2D pt( Convert( xStr ), Convert( yStr ) );
 chain.Append( RelPos( pt ) );
 
 prevPt = pt;
 }
 else if( sym == 'Z' )
 {
 if( chain.PointCount() > 2 )
 {
 chain.SetClosed( true );
 result.emplace_back( chain );
 }
 chain.Clear();
 }
 else if( sym == 'L' )
 {
 while( true )
 {
 if( pos >= data.size() )
 break;
 
 wxUniChar ch = data[pos];
 
 while( ch == ' ' || ch == ',' )
 {
 if( ++pos >= data.size() )
 break;
 
 ch = data[pos];
 }
 
 if( !isdigit( ch ) )
 break;
 
 wxString xStr, yStr;
 
 readNumber( xStr );
 readNumber( yStr );
 
 VECTOR2D pt( Convert( xStr ), Convert( yStr ) );
 chain.Append( RelPos( pt ) );
 
 prevPt = pt;
 };
 }
 else if( sym == 'A' )
 {
 wxString radX, radY, unknown, farFlag, cwFlag, endX, endY;
 
 readNumber( radX );
 readNumber( radY );
 readNumber( unknown );
 readNumber( farFlag );
 readNumber( cwFlag );
 readNumber( endX );
 readNumber( endY );
 
 bool isFar = farFlag == wxS( "1" );
 bool cw = cwFlag == wxS( "1" );
 VECTOR2D rad( Convert( radX ), Convert( radY ) );
 VECTOR2D end( Convert( endX ), Convert( endY ) );
 
 VECTOR2D start = prevPt;
 VECTOR2D delta = end - start;
 
 double d = delta.EuclideanNorm();
 double h = sqrt( std::max( 0.0, rad.x * rad.x - d * d / 4 ) );
 
 //( !far && cw ) => h
 //( far && cw ) => -h
 //( !far && !cw ) => -h
 //( far && !cw ) => h
 VECTOR2D arcCenter =
 start + delta / 2 + delta.Perpendicular().Resize( ( isFar ^ cw ) ? h : -h );
 
 SHAPE_ARC arc;
 arc.ConstructFromStartEndCenter( RelPos( start ), RelPos( end ), RelPos( arcCenter ),
 !cw );
 
 chain.Append( arc );
 
 prevPt = end;
 }
 else if( sym == 'C' )
 {
 wxString p1_xStr, p1_yStr, p2_xStr, p2_yStr, p3_xStr, p3_yStr;
 readNumber( p1_xStr );
 readNumber( p1_yStr );
 readNumber( p2_xStr );
 readNumber( p2_yStr );
 readNumber( p3_xStr );
 readNumber( p3_yStr );
 
 VECTOR2D pt1( Convert( p1_xStr ), Convert( p1_yStr ) );
 VECTOR2D pt2( Convert( p2_xStr ), Convert( p2_yStr ) );
 VECTOR2D pt3( Convert( p3_xStr ), Convert( p3_yStr ) );
 
 std::vector<VECTOR2I> ctrlPoints = { RelPos( prevPt ), RelPos( pt1 ), RelPos( pt2 ),
 RelPos( pt3 ) };
 BEZIER_POLY converter( ctrlPoints );
 
 std::vector<VECTOR2I> bezierPoints;
 converter.GetPoly( bezierPoints, aArcMinSegLen, 16 );
 
 chain.Append( bezierPoints );
 
 prevPt = pt3;
 }
 } while( pos < data.size() );
 
 if( chain.PointCount() > 2 )
 {
 result.emplace_back( chain );
 }
 
 return result;
}