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kicad/pcbnew/import_dxf/dxf2brd_items.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 1992-2016 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
*/
// The DXF reader lib (libdxfrw) comes from LibreCAD project, a 2D CAD program
// libdxfrw can be found on http://sourceforge.net/projects/libdxfrw/
// or (latest sources) on
// https://github.com/LibreCAD/LibreCAD/tree/master/libraries/libdxfrw/src
//
// There is no doc to use it, but have a look to
// https://github.com/LibreCAD/LibreCAD/blob/master/librecad/src/lib/filters/rs_filterdxf.cpp
// and https://github.com/LibreCAD/LibreCAD/blob/master/librecad/src/lib/filters/rs_filterdxf.h
// Each time a dxf entity is read, a "call back" fuction is called
// like void DXF2BRD_CONVERTER::addLine( const DRW_Line& data ) when a line is read.
// this function just add the BOARD entity from dxf parameters (start and end point ...)
#include "libdxfrw.h"
#include "dxf2brd_items.h"
#include <wx/arrstr.h>
#include <wx/regex.h>
#include <trigo.h>
#include <macros.h>
#include <class_board.h>
#include <class_drawsegment.h>
#include <class_edge_mod.h>
#include <class_pcb_text.h>
#include <class_text_mod.h>
#include <drw_base.h>
// minimum bulge value before resorting to a line segment;
// the value 0.0218 is equivalent to about 5 degrees arc,
#define MIN_BULGE 0.0218
DXF2BRD_CONVERTER::DXF2BRD_CONVERTER() : DRW_Interface()
{
m_xOffset = 0.0; // X coord offset for conversion (in mm)
m_yOffset = 0.0; // Y coord offset for conversion (in mm)
m_DXF2mm = 1.0; // The scale factor to convert DXF units to mm
m_version = 0;
m_defaultThickness = 0.1;
m_brdLayer = Dwgs_User;
m_useModuleItems = true;
}
DXF2BRD_CONVERTER::~DXF2BRD_CONVERTER()
{
}
// coordinate conversions from dxf to internal units
int DXF2BRD_CONVERTER::mapX( double aDxfCoordX )
{
return Millimeter2iu( m_xOffset + ( aDxfCoordX * m_DXF2mm ) );
}
int DXF2BRD_CONVERTER::mapY( double aDxfCoordY )
{
return Millimeter2iu( m_yOffset - ( aDxfCoordY * m_DXF2mm ) );
}
int DXF2BRD_CONVERTER::mapDim( double aDxfValue )
{
return Millimeter2iu( aDxfValue * m_DXF2mm );
}
bool DXF2BRD_CONVERTER::ImportDxfFile( const wxString& aFile )
{
dxfRW* dxf = new dxfRW( aFile.ToUTF8() );
bool success = dxf->read( this, true );
delete dxf;
return success;
}
void DXF2BRD_CONVERTER::addLayer( const DRW_Layer& aData )
{
// Not yet useful in Pcbnew.
#if 0
wxString name = wxString::FromUTF8( aData.name.c_str() );
wxLogMessage( name );
#endif
}
void DXF2BRD_CONVERTER::addLine( const DRW_Line& aData )
{
DRAWSEGMENT* segm = ( m_useModuleItems ) ?
static_cast< DRAWSEGMENT* >( new EDGE_MODULE( NULL ) ) : new DRAWSEGMENT;
segm->SetLayer( ToLAYER_ID( m_brdLayer ) );
wxPoint start( mapX( aData.basePoint.x ), mapY( aData.basePoint.y ) );
segm->SetStart( start );
wxPoint end( mapX( aData.secPoint.x ), mapY( aData.secPoint.y ) );
segm->SetEnd( end );
segm->SetWidth( mapDim( aData.thickness == 0 ? m_defaultThickness : aData.thickness ) );
m_newItemsList.push_back( segm );
}
void DXF2BRD_CONVERTER::addPolyline(const DRW_Polyline& aData )
{
// Currently, Pcbnew does not know polylines, for boards.
// So we have to convert a polyline to a set of segments.
// Obviously, the z coordinate is ignored
wxPoint polyline_startpoint;
wxPoint segment_startpoint;
for( unsigned ii = 0; ii < aData.vertlist.size(); ii++ )
{
DRW_Vertex* vertex = aData.vertlist[ii];
if( ii == 0 )
{
segment_startpoint.x = mapX( vertex->basePoint.x );
segment_startpoint.y = mapY( vertex->basePoint.y );
polyline_startpoint = segment_startpoint;
continue;
}
DRAWSEGMENT* segm = ( m_useModuleItems ) ?
static_cast< DRAWSEGMENT* >( new EDGE_MODULE( NULL ) ) :
new DRAWSEGMENT;
segm->SetLayer( ToLAYER_ID( m_brdLayer ) );
segm->SetStart( segment_startpoint );
wxPoint segment_endpoint( mapX( vertex->basePoint.x ), mapY( vertex->basePoint.y ) );
segm->SetEnd( segment_endpoint );
segm->SetWidth( mapDim( aData.thickness == 0 ? m_defaultThickness
: aData.thickness ) );
m_newItemsList.push_back( segm );
segment_startpoint = segment_endpoint;
}
// Polyline flags bit 0 indicates closed (1) or open (0) polyline
if( aData.flags & 1 )
{
DRAWSEGMENT* closing_segm = ( m_useModuleItems ) ?
static_cast< DRAWSEGMENT* >( new EDGE_MODULE( NULL ) ) :
new DRAWSEGMENT;
closing_segm->SetLayer( ToLAYER_ID( m_brdLayer ) );
closing_segm->SetStart( segment_startpoint );
closing_segm->SetEnd( polyline_startpoint );
closing_segm->SetWidth( mapDim( aData.thickness == 0 ? m_defaultThickness
: aData.thickness ) );
m_newItemsList.push_back( closing_segm );
}
}
void DXF2BRD_CONVERTER::addLWPolyline(const DRW_LWPolyline& aData )
{
// Currently, Pcbnew does not know polylines, for boards.
// So we have to convert a polyline to a set of segments.
// The import is a simplified import: the width of segment is
// (obviously constant and is the width of the DRW_LWPolyline.
// the variable width of each vertex (when exists) is not used.
wxRealPoint seg_start;
wxRealPoint poly_start;
double bulge = 0.0;
int lineWidth = mapDim( aData.thickness == 0 ? m_defaultThickness
: aData.thickness );
for( unsigned ii = 0; ii < aData.vertlist.size(); ii++ )
{
DRW_Vertex2D* vertex = aData.vertlist[ii];
if( ii == 0 )
{
seg_start.x = m_xOffset + vertex->x * m_DXF2mm;
seg_start.y = m_yOffset - vertex->y * m_DXF2mm;
bulge = vertex->bulge;
poly_start = seg_start;
continue;
}
wxRealPoint seg_end( m_xOffset + vertex->x * m_DXF2mm, m_yOffset - vertex->y * m_DXF2mm );
if( std::abs( bulge ) < MIN_BULGE )
insertLine( seg_start, seg_end, lineWidth );
else
insertArc( seg_start, seg_end, bulge, lineWidth );
bulge = vertex->bulge;
seg_start = seg_end;
}
// LWPolyline flags bit 0 indicates closed (1) or open (0) polyline
if( aData.flags & 1 )
{
if( std::abs( bulge ) < MIN_BULGE )
insertLine( seg_start, poly_start, lineWidth );
else
insertArc( seg_start, poly_start, bulge, lineWidth );
}
}
void DXF2BRD_CONVERTER::addCircle( const DRW_Circle& aData )
{
DRAWSEGMENT* segm = ( m_useModuleItems ) ?
static_cast< DRAWSEGMENT* >( new EDGE_MODULE( NULL ) ) : new DRAWSEGMENT;
segm->SetLayer( ToLAYER_ID( m_brdLayer ) );
segm->SetShape( S_CIRCLE );
wxPoint center( mapX( aData.basePoint.x ), mapY( aData.basePoint.y ) );
segm->SetCenter( center );
wxPoint circle_start( mapX( aData.basePoint.x + aData.radious ), mapY( aData.basePoint.y ) );
segm->SetArcStart( circle_start );
segm->SetWidth( mapDim( aData.thickness == 0 ? m_defaultThickness : aData.thickness ) );
m_newItemsList.push_back( segm );
}
/*
* Import Arc entities.
*/
void DXF2BRD_CONVERTER::addArc( const DRW_Arc& data )
{
DRAWSEGMENT* segm = ( m_useModuleItems ) ?
static_cast< DRAWSEGMENT* >( new EDGE_MODULE( NULL ) ) : new DRAWSEGMENT;
segm->SetLayer( ToLAYER_ID( m_brdLayer ) );
segm->SetShape( S_ARC );
// Init arc centre:
wxPoint center( mapX( data.basePoint.x ), mapY( data.basePoint.y ) );
segm->SetCenter( center );
// Init arc start point
double arcStartx = data.radious;
double arcStarty = 0;
double startangle = data.staangle;
double endangle = data.endangle;
RotatePoint( &arcStartx, &arcStarty, -RAD2DECIDEG( startangle ) );
wxPoint arcStart( mapX( arcStartx + data.basePoint.x ),
mapY( arcStarty + data.basePoint.y ) );
segm->SetArcStart( arcStart );
// calculate arc angle (arcs are CCW, and should be < 0 in Pcbnew)
double angle = -RAD2DECIDEG( endangle - startangle );
if( angle > 0.0 )
angle -= 3600.0;
segm->SetAngle( angle );
segm->SetWidth( mapDim( data.thickness == 0 ? m_defaultThickness : data.thickness ) );
m_newItemsList.push_back( segm );
}
void DXF2BRD_CONVERTER::addText( const DRW_Text& aData )
{
BOARD_ITEM* brdItem;
EDA_TEXT* textItem;
if( m_useModuleItems )
{
TEXTE_MODULE* modText = new TEXTE_MODULE( NULL );
brdItem = static_cast< BOARD_ITEM* >( modText );
textItem = static_cast< EDA_TEXT* >( modText );
}
else
{
TEXTE_PCB* pcbText = new TEXTE_PCB( NULL );
brdItem = static_cast< BOARD_ITEM* >( pcbText );
textItem = static_cast< EDA_TEXT* >( pcbText );
}
brdItem->SetLayer( ToLAYER_ID( m_brdLayer ) );
wxPoint refPoint( mapX( aData.basePoint.x ), mapY( aData.basePoint.y ) );
wxPoint secPoint( mapX( aData.secPoint.x ), mapY( aData.secPoint.y ) );
if( aData.alignV != 0 || aData.alignH != 0 || aData.alignH == DRW_Text::HMiddle )
{
if( aData.alignH != DRW_Text::HAligned && aData.alignH != DRW_Text::HFit )
{
wxPoint tmp = secPoint;
secPoint = refPoint;
refPoint = tmp;
}
}
switch( aData.alignV )
{
case DRW_Text::VBaseLine:
textItem->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
break;
case DRW_Text::VBottom:
textItem->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
break;
case DRW_Text::VMiddle:
textItem->SetVertJustify( GR_TEXT_VJUSTIFY_CENTER );
break;
case DRW_Text::VTop:
textItem->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
break;
}
switch( aData.alignH )
{
case DRW_Text::HLeft:
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
break;
case DRW_Text::HCenter:
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_CENTER );
break;
case DRW_Text::HRight:
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
break;
case DRW_Text::HAligned:
// no equivalent options in text pcb.
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
break;
case DRW_Text::HMiddle:
// no equivalent options in text pcb.
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_CENTER );
break;
case DRW_Text::HFit:
// no equivalent options in text pcb.
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
break;
}
#if 0
wxString sty = wxString::FromUTF8( aData.style.c_str() );
sty = sty.ToLower();
if( aData.textgen == 2 )
{
// Text dir = left to right;
} else if( aData.textgen == 4 )
{
// Text dir = top to bottom;
} else
{
}
#endif
wxString text = toNativeString( wxString::FromUTF8( aData.text.c_str() ) );
textItem->SetTextPos( refPoint );
textItem->SetTextAngle( aData.angle * 10 );
// The 0.8 factor gives a better height/width ratio with our font
textItem->SetTextWidth( mapDim( aData.height * 0.8 ) );
textItem->SetTextHeight( mapDim( aData.height ) );
textItem->SetThickness( mapDim( aData.thickness == 0 ? m_defaultThickness : aData.thickness ) );
textItem->SetText( text );
m_newItemsList.push_back( static_cast< BOARD_ITEM* >( brdItem ) );
}
void DXF2BRD_CONVERTER::addMText( const DRW_MText& aData )
{
wxString text = toNativeString( wxString::FromUTF8( aData.text.c_str() ) );
wxString attrib, tmp;
/* Some texts start by '\' and have formating chars (font name, font option...)
* ending with ';'
* Here are some mtext formatting codes:
* Format code Purpose
* \0...\o Turns overline on and off
* \L...\l Turns underline on and off
* \~ Inserts a nonbreaking space
\\ Inserts a backslash
\\\{...\} Inserts an opening and closing brace
\\ \File name; Changes to the specified font file
\\ \Hvalue; Changes to the text height specified in drawing units
\\ \Hvaluex; Changes the text height to a multiple of the current text height
\\ \S...^...; Stacks the subsequent text at the \, #, or ^ symbol
\\ \Tvalue; Adjusts the space between characters, from.75 to 4 times
\\ \Qangle; Changes obliquing angle
\\ \Wvalue; Changes width factor to produce wide text
\\ \A Sets the alignment value; valid values: 0, 1, 2 (bottom, center, top) while( text.StartsWith( wxT("\\") ) )
*/
while( text.StartsWith( wxT( "\\" ) ) )
{
attrib << text.BeforeFirst( ';' );
tmp = text.AfterFirst( ';' );
text = tmp;
}
BOARD_ITEM* brdItem;
EDA_TEXT* textItem;
if( m_useModuleItems )
{
TEXTE_MODULE* modText = new TEXTE_MODULE( NULL );
brdItem = static_cast< BOARD_ITEM* >( modText );
textItem = static_cast< EDA_TEXT* >( modText );
}
else
{
TEXTE_PCB* pcbText = new TEXTE_PCB( NULL );
brdItem = static_cast< BOARD_ITEM* >( pcbText );
textItem = static_cast< EDA_TEXT* >( pcbText );
}
brdItem->SetLayer( ToLAYER_ID( m_brdLayer ) );
wxPoint textpos( mapX( aData.basePoint.x ), mapY( aData.basePoint.y ) );
textItem->SetTextPos( textpos );
textItem->SetTextAngle( aData.angle * 10 );
// The 0.8 factor gives a better height/width ratio with our font
textItem->SetTextWidth( mapDim( aData.height * 0.8 ) );
textItem->SetTextHeight( mapDim( aData.height ) );
textItem->SetThickness( mapDim( aData.thickness == 0 ? m_defaultThickness : aData.thickness ) );
textItem->SetText( text );
// Initialize text justifications:
if( aData.textgen <= 3 )
{
textItem->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
}
else if( aData.textgen <= 6 )
{
textItem->SetVertJustify( GR_TEXT_VJUSTIFY_CENTER );
}
else
{
textItem->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
}
if( aData.textgen % 3 == 1 )
{
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
}
else if( aData.textgen % 3 == 2 )
{
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_CENTER );
}
else
{
textItem->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
}
#if 0 // These setting have no mening in Pcbnew
if( data.alignH == 1 )
{
// Text is left to right;
}
else if( data.alignH == 3 )
{
// Text is top to bottom;
}
else
{
// use ByStyle;
}
if( aData.alignV == 1 )
{
// use AtLeast;
}
else
{
// useExact;
}
#endif
m_newItemsList.push_back( static_cast< BOARD_ITEM* >( brdItem ) );
}
void DXF2BRD_CONVERTER::addHeader( const DRW_Header* data )
{
std::map<std::string, DRW_Variant*>::const_iterator it;
m_DXF2mm = 1.0; // assume no scale factor
for( it = data->vars.begin(); it != data->vars.end(); ++it )
{
std::string key = ( (*it).first ).c_str();
if( key == "$DWGCODEPAGE" )
{
DRW_Variant* var = (*it).second;
m_codePage = ( *var->content.s );
}
else if( key == "$INSUNITS" )
{
DRW_Variant* var = (*it).second;
switch( var->content.i )
{
case 1: // inches
m_DXF2mm = 25.4;
break;
case 2: // feet
m_DXF2mm = 304.8;
break;
case 5: // centimeters
m_DXF2mm = 10.0;
break;
case 6: // meters
m_DXF2mm = 1000.0;
break;
case 8: // microinches
m_DXF2mm = 2.54e-5;
break;
case 9: // mils
m_DXF2mm = 0.0254;
break;
case 10: // yards
m_DXF2mm = 914.4;
break;
case 11: // Angstroms
m_DXF2mm = 1.0e-7;
break;
case 12: // nanometers
m_DXF2mm = 1.0e-6;
break;
case 13: // micrometers
m_DXF2mm = 1.0e-3;
break;
case 14: // decimeters
m_DXF2mm = 100.0;
break;
default:
// use the default of 1.0 for:
// 0: Unspecified Units
// 4: mm
// 3: miles
// 7: kilometers
// 15: decameters
// 16: hectometers
// 17: gigameters
// 18: AU
// 19: lightyears
// 20: parsecs
break;
}
}
}
}
wxString DXF2BRD_CONVERTER::toDxfString( const wxString& aStr )
{
wxString res;
int j = 0;
for( unsigned i = 0; i<aStr.length(); ++i )
{
int c = aStr[i];
if( c > 175 || c < 11 )
{
res.append( aStr.Mid( j, i - j ) );
j = i;
switch( c )
{
case 0x0A:
res += wxT( "\\P" );
break;
// diameter:
#ifdef __WINDOWS_
// windows, as always, is special.
case 0x00D8:
#else
case 0x2205:
#endif
res += wxT( "%%C" );
break;
// degree:
case 0x00B0:
res += wxT( "%%D" );
break;
// plus/minus
case 0x00B1:
res += wxT( "%%P" );
break;
default:
j--;
break;
}
j++;
}
}
res.append( aStr.Mid( j ) );
return res;
}
wxString DXF2BRD_CONVERTER::toNativeString( const wxString& aData )
{
wxString res;
// Ignore font tags:
int j = 0;
for( unsigned i = 0; i < aData.length(); ++i )
{
if( aData[ i ] == 0x7B ) // is '{' ?
{
if( aData[ i + 1 ] == 0x5c && aData[ i + 2 ] == 0x66 ) // is "\f" ?
{
// found font tag, append parsed part
res.append( aData.Mid( j, i - j ) );
// skip to ';'
for( unsigned k = i + 3; k < aData.length(); ++k )
{
if( aData[ k ] == 0x3B )
{
i = j = ++k;
break;
}
}
// add to '}'
for( unsigned k = i; k < aData.length(); ++k )
{
if( aData[ k ] == 0x7D )
{
res.append( aData.Mid( i, k - i ) );
i = j = ++k;
break;
}
}
}
}
}
res.append( aData.Mid( j ) );
#if 1
wxRegEx regexp;
// Line feed:
regexp.Compile( wxT( "\\\\P" ) );
regexp.Replace( &res, wxT( "\n" ) );
// Space:
regexp.Compile( wxT( "\\\\~" ) );
regexp.Replace( &res, wxT( " " ) );
// diameter:
regexp.Compile( wxT( "%%[cC]" ) );
#ifdef __WINDOWS__
// windows, as always, is special.
regexp.Replace( &res, wxChar( 0xD8 ) );
#else
// Empty_set, diameter is 0x2300
regexp.Replace( &res, wxChar( 0x2205 ) );
#endif
// degree:
regexp.Compile( wxT( "%%[dD]" ) );
regexp.Replace( &res, wxChar( 0x00B0 ) );
// plus/minus
regexp.Compile( wxT( "%%[pP]" ) );
regexp.Replace( &res, wxChar( 0x00B1 ) );
#endif
return res;
}
void DXF2BRD_CONVERTER::addTextStyle( const DRW_Textstyle& aData )
{
// TODO
}
void DXF2BRD_CONVERTER::insertLine( const wxRealPoint& aSegStart,
const wxRealPoint& aSegEnd, int aWidth )
{
DRAWSEGMENT* segm = ( m_useModuleItems ) ?
static_cast< DRAWSEGMENT* >( new EDGE_MODULE( NULL ) ) : new DRAWSEGMENT;
wxPoint segment_startpoint( Millimeter2iu( aSegStart.x ), Millimeter2iu( aSegStart.y ) );
wxPoint segment_endpoint( Millimeter2iu( aSegEnd.x ), Millimeter2iu( aSegEnd.y ) );
segm->SetLayer( ToLAYER_ID( m_brdLayer ) );
segm->SetStart( segment_startpoint );
segm->SetEnd( segment_endpoint );
segm->SetWidth( aWidth );
m_newItemsList.push_back( segm );
return;
}
void DXF2BRD_CONVERTER::insertArc( const wxRealPoint& aSegStart, const wxRealPoint& aSegEnd,
double aBulge, int aWidth )
{
DRAWSEGMENT* segm = ( m_useModuleItems ) ?
static_cast< DRAWSEGMENT* >( new EDGE_MODULE( NULL ) ) : new DRAWSEGMENT;
wxPoint segment_startpoint( Millimeter2iu( aSegStart.x ), Millimeter2iu( aSegStart.y ) );
wxPoint segment_endpoint( Millimeter2iu( aSegEnd.x ), Millimeter2iu( aSegEnd.y ) );
// ensure aBulge represents an angle from +/- ( 0 .. approx 359.8 deg )
if( aBulge < -2000.0 )
aBulge = -2000.0;
else if( aBulge > 2000.0 )
aBulge = 2000.0;
double ang = 4.0 * atan( aBulge );
// reflect the Y values to put everything in a RHCS
wxRealPoint sp( aSegStart.x, -aSegStart.y );
wxRealPoint ep( aSegEnd.x, -aSegEnd.y );
// angle from end->start
double offAng = atan2( ep.y - sp.y, ep.x - sp.x );
// length of subtended segment = 1/2 distance between the 2 points
double d = 0.5 * sqrt( (sp.x - ep.x) * (sp.x - ep.x) + (sp.y - ep.y) * (sp.y - ep.y) );
// midpoint of the subtended segment
double xm = ( sp.x + ep.x ) * 0.5;
double ym = ( sp.y + ep.y ) * 0.5;
double radius = d / sin( ang * 0.5 );
if( radius < 0.0 )
radius = -radius;
// calculate the height of the triangle with base d and hypotenuse r
double dh2 = radius * radius - d * d;
// this should only ever happen due to rounding errors when r == d
if( dh2 < 0.0 )
dh2 = 0.0;
double h = sqrt( dh2 );
if( ang < 0.0 )
offAng -= M_PI_2;
else
offAng += M_PI_2;
// for angles greater than 180 deg we need to flip the
// direction in which the arc center is found relative
// to the midpoint of the subtended segment.
if( ang < -M_PI )
offAng += M_PI;
else if( ang > M_PI )
offAng -= M_PI;
// center point
double cx = h * cos( offAng ) + xm;
double cy = h * sin( offAng ) + ym;
segm->SetLayer( ToLAYER_ID( m_brdLayer ) );
segm->SetShape( S_ARC );
segm->SetCenter( wxPoint( Millimeter2iu( cx ), Millimeter2iu( -cy ) ) );
if( ang < 0.0 )
{
segm->SetArcStart( wxPoint( Millimeter2iu( ep.x ), Millimeter2iu( -ep.y ) ) );
segm->SetAngle( RAD2DECIDEG( ang ) );
}
else
{
segm->SetArcStart( wxPoint( Millimeter2iu( sp.x ), Millimeter2iu( -sp.y ) ) );
segm->SetAngle( RAD2DECIDEG( -ang ) );
}
segm->SetWidth( aWidth );
m_newItemsList.push_back( segm );
return;
}
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