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+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2014 Cirilo Bernardo
+ *
+ * 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 <cstdio>
+#include <iostream>
+#include <libdxfrw.h>
+#include <dxf2idf.h>
+
+// differences in angle smaller than MIN_ANG are considered equal
+#define MIN_ANG (0.01)
+
+// min and max bulge bracketing min. arc before transition to line segment
+// and max. arc limit
+// MIN_BULGE = 0.002 ~0.45 degrees
+// MAX_BULGE = 2000 ~89.97 degrees
+#define MIN_BULGE 0.002
+#define MAX_BULGE 2000.0
+
+DXF2IDF::~DXF2IDF()
+{
+ while( !lines.empty() )
+ {
+#ifdef DEBUG_IDF
+ IDF3::printSeg( lines.back() );
+#endif
+ delete lines.back();
+ lines.pop_back();
+ }
+}
+
+
+bool DXF2IDF::ReadDxf( const std::string aFile )
+{
+ dxfRW* reader = new dxfRW( aFile.c_str() );
+
+ if( !reader )
+ return false;
+
+ bool success = reader->read( this, true );
+
+ delete reader;
+ return success;
+}
+
+
+void DXF2IDF::addLine( const DRW_Line& data )
+{
+ IDF_POINT p1, p2;
+
+ p1.x = data.basePoint.x * m_scale;
+ p1.y = data.basePoint.y * m_scale;
+ p2.x = data.secPoint.x * m_scale;
+ p2.y = data.secPoint.y * m_scale;
+
+ insertLine( p1, p2 );
+ return;
+}
+
+
+void DXF2IDF::addCircle( const DRW_Circle& data )
+{
+ IDF_POINT p1, p2;
+
+ p1.x = data.basePoint.x * m_scale;
+ p1.y = data.basePoint.y * m_scale;
+
+ p2.x = p1.x + data.radious * m_scale;
+ p2.y = p1.y;
+
+ IDF_SEGMENT* seg = new IDF_SEGMENT( p1, p2, 360, true );
+
+ if( seg )
+ lines.push_back( seg );
+
+ return;
+}
+
+
+void DXF2IDF::addArc( const DRW_Arc& data )
+{
+ IDF_POINT p1, p2;
+
+ p1.x = data.basePoint.x * m_scale;
+ p1.y = data.basePoint.y * m_scale;
+
+ // note: DXF circles always run CCW
+ double ea = data.endangle;
+
+ while( ea < data.staangle )
+ ea += M_PI;
+
+ p2.x = p1.x + cos( data.staangle ) * data.radious * m_scale;
+ p2.y = p1.y + sin( data.staangle ) * data.radious * m_scale;
+
+ double angle = ( ea - data.staangle ) * 180.0 / M_PI;
+
+ IDF_SEGMENT* seg = new IDF_SEGMENT( p1, p2, angle, true );
+
+ if( seg )
+ lines.push_back( seg );
+
+ return;
+}
+
+
+bool DXF2IDF::WriteOutline( FILE* aFile, bool isInch )
+{
+ if( lines.empty() )
+ {
+ std::cerr << "* DXF2IDF: empty outline\n";
+ return false;
+ }
+
+ // 1. find lowest X value
+ // 2. string an outline together
+ // 3. emit warnings if more than 1 outline
+ IDF_OUTLINE outline;
+
+ IDF3::GetOutline( lines, outline );
+
+ if( outline.empty() )
+ {
+ std::cerr << "* DXF2IDF::WriteOutline(): no valid outline in file\n";
+ return false;
+ }
+
+ if( !lines.empty() )
+ {
+ std::cerr << "* DXF2IDF::WriteOutline(): WARNING: more than 1 outline in file\n";
+ std::cerr << "* Only the first outline will be used\n";
+ }
+
+ char loopDir = '1';
+
+ if( outline.IsCCW() )
+ loopDir = '0';
+
+ std::list<IDF_SEGMENT*>::iterator bo;
+ std::list<IDF_SEGMENT*>::iterator eo;
+
+ if( outline.size() == 1 )
+ {
+ if( !outline.front()->IsCircle() )
+ {
+ std::cerr << "* DXF2IDF::WriteOutline(): bad outline\n";
+ return false;
+ }
+
+ // NOTE: a circle always has an angle of 360, never -360,
+ // otherwise SolidWorks chokes on the file.
+ if( isInch )
+ {
+ fprintf( aFile, "%c %d %d 0\n", loopDir,
+ (int) (1000 * outline.front()->startPoint.x),
+ (int) (1000 * outline.front()->startPoint.y) );
+ fprintf( aFile, "%c %d %d 360\n", loopDir,
+ (int) (1000 * outline.front()->endPoint.x),
+ (int) (1000 * outline.front()->endPoint.y) );
+ }
+ else
+ {
+ fprintf( aFile, "%c %.3f %.3f 0\n", loopDir,
+ outline.front()->startPoint.x, outline.front()->startPoint.y );
+ fprintf( aFile, "%c %.3f %.3f 360\n", loopDir,
+ outline.front()->endPoint.x, outline.front()->endPoint.y );
+ }
+
+ return true;
+ }
+
+ // ensure that the very last point is the same as the very first point
+ outline.back()-> endPoint = outline.front()->startPoint;
+
+ bo = outline.begin();
+ eo = outline.end();
+
+ // for the first item we write out both points
+ if( (*bo)->angle < MIN_ANG && (*bo)->angle > -MIN_ANG )
+ {
+ if( isInch )
+ {
+ fprintf( aFile, "%c %d %d 0\n", loopDir,
+ (int) (1000 * (*bo)->startPoint.x),
+ (int) (1000 * (*bo)->startPoint.y) );
+ fprintf( aFile, "%c %d %d 0\n", loopDir,
+ (int) (1000 * (*bo)->endPoint.x),
+ (int) (1000 * (*bo)->endPoint.y) );
+ }
+ else
+ {
+ fprintf( aFile, "%c %.3f %.3f 0\n", loopDir,
+ (*bo)->startPoint.x, (*bo)->startPoint.y );
+ fprintf( aFile, "%c %.3f %.3f 0\n", loopDir,
+ (*bo)->endPoint.x, (*bo)->endPoint.y );
+ }
+ }
+ else
+ {
+ if( isInch )
+ {
+ fprintf( aFile, "%c %d %d 0\n", loopDir,
+ (int) (1000 * (*bo)->startPoint.x),
+ (int) (1000 * (*bo)->startPoint.y) );
+ fprintf( aFile, "%c %d %d %.2f\n", loopDir,
+ (int) (1000 * (*bo)->endPoint.x),
+ (int) (1000 * (*bo)->endPoint.y),
+ (*bo)->angle );
+ }
+ else
+ {
+ fprintf( aFile, "%c %.3f %.3f 0\n", loopDir,
+ (*bo)->startPoint.x, (*bo)->startPoint.y );
+ fprintf( aFile, "%c %.3f %.3f %.2f\n", loopDir,
+ (*bo)->endPoint.x, (*bo)->endPoint.y, (*bo)->angle );
+ }
+ }
+
+ ++bo;
+
+ // for all other segments we only write out the last point
+ while( bo != eo )
+ {
+ if( isInch )
+ {
+ if( (*bo)->angle < MIN_ANG && (*bo)->angle > -MIN_ANG )
+ {
+ fprintf( aFile, "%c %d %d 0\n", loopDir,
+ (int) (1000 * (*bo)->endPoint.x),
+ (int) (1000 * (*bo)->endPoint.y) );
+ }
+ else
+ {
+ fprintf( aFile, "%c %d %d %.2f\n", loopDir,
+ (int) (1000 * (*bo)->endPoint.x),
+ (int) (1000 * (*bo)->endPoint.y),
+ (*bo)->angle );
+ }
+ }
+ else
+ {
+ if( (*bo)->angle < MIN_ANG && (*bo)->angle > -MIN_ANG )
+ {
+ fprintf( aFile, "%c %.5f %.5f 0\n", loopDir,
+ (*bo)->endPoint.x, (*bo)->endPoint.y );
+ }
+ else
+ {
+ fprintf( aFile, "%c %.5f %.5f %.2f\n", loopDir,
+ (*bo)->endPoint.x, (*bo)->endPoint.y, (*bo)->angle );
+ }
+ }
+
+ ++bo;
+ }
+
+ return true;
+}
+
+
+void DXF2IDF::addHeader( const DRW_Header* data )
+{
+ std::map<std::string, DRW_Variant*>::const_iterator it;
+ m_scale = 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 == "$INSUNITS" )
+ {
+ DRW_Variant* var = (*it).second;
+
+ switch( var->content.i )
+ {
+ case 1: // inches
+ m_scale = 25.4;
+ break;
+
+ case 2: // feet
+ m_scale = 304.8;
+ break;
+
+ case 5: // centimeters
+ m_scale = 10.0;
+ break;
+
+ case 6: // meters
+ m_scale = 1000.0;
+ break;
+
+ case 8: // microinches
+ m_scale = 2.54e-5;
+ break;
+
+ case 9: // mils
+ m_scale = 0.0254;
+ break;
+
+ case 10: // yards
+ m_scale = 914.4;
+ break;
+
+ case 11: // Angstroms
+ m_scale = 1.0e-7;
+ break;
+
+ case 12: // nanometers
+ m_scale = 1.0e-6;
+ break;
+
+ case 13: // micrometers
+ m_scale = 1.0e-3;
+ break;
+
+ case 14: // decimeters
+ m_scale = 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;
+ }
+ }
+ }
+}
+
+
+void DXF2IDF::addLWPolyline(const DRW_LWPolyline& data )
+{
+ IDF_POINT poly_start;
+ IDF_POINT seg_start;
+ IDF_POINT seg_end;
+ double bulge = 0.0;
+
+ if( !data.vertlist.empty() )
+ {
+ DRW_Vertex2D* vertex = data.vertlist[0];
+ seg_start.x = vertex->x * m_scale;
+ seg_start.y = vertex->y * m_scale;
+ poly_start = seg_start;
+ bulge = vertex->bulge;
+ }
+
+ for( size_t i = 1; i < data.vertlist.size(); ++i )
+ {
+ DRW_Vertex2D* vertex = data.vertlist[i];
+ seg_end.x = vertex->x * m_scale;
+ seg_end.y = vertex->y * m_scale;
+
+ if( std::abs( bulge ) < MIN_BULGE )
+ insertLine( seg_start, seg_end );
+ else
+ insertArc( seg_start, seg_end, bulge );
+
+ seg_start = seg_end;
+ bulge = vertex->bulge;
+ }
+
+ // Polyline flags bit 0 indicates closed (1) or open (0) polyline
+ if( data.flags & 1 )
+ {
+ if( std::abs( bulge ) < MIN_BULGE )
+ insertLine( seg_start, poly_start );
+ else
+ insertArc( seg_start, poly_start, bulge );
+ }
+
+ return;
+}
+
+
+void DXF2IDF::addPolyline(const DRW_Polyline& data )
+{
+ IDF_POINT poly_start;
+ IDF_POINT seg_start;
+ IDF_POINT seg_end;
+
+ if( !data.vertlist.empty() )
+ {
+ DRW_Vertex* vertex = data.vertlist[0];
+ seg_start.x = vertex->basePoint.x * m_scale;
+ seg_start.y = vertex->basePoint.y * m_scale;
+ poly_start = seg_start;
+ }
+
+ for( size_t i = 1; i < data.vertlist.size(); ++i )
+ {
+ DRW_Vertex* vertex = data.vertlist[i];
+ seg_end.x = vertex->basePoint.x * m_scale;
+ seg_end.y = vertex->basePoint.y * m_scale;
+ insertLine( seg_start, seg_end );
+ seg_start = seg_end;
+ }
+
+ // Polyline flags bit 0 indicates closed (1) or open (0) polyline
+ if( data.flags & 1 )
+ insertLine( seg_start, poly_start );
+
+ return;
+}
+
+
+void DXF2IDF::insertLine( const IDF_POINT& aSegStart, const IDF_POINT& aSegEnd )
+{
+ IDF_SEGMENT* seg = new IDF_SEGMENT( aSegStart, aSegEnd );
+
+ if( seg )
+ lines.push_back( seg );
+
+ return;
+}
+
+
+void DXF2IDF::insertArc( const IDF_POINT& aSegStart, const IDF_POINT& aSegEnd,
+ double aBulge )
+{
+ if( aBulge < -MAX_BULGE )
+ aBulge = -MAX_BULGE;
+ else if( aBulge > MAX_BULGE )
+ aBulge = MAX_BULGE;
+
+ double ang = 720.0 * atan( aBulge ) / M_PI;
+
+ IDF_SEGMENT* seg = new IDF_SEGMENT( aSegStart, aSegEnd, ang, false );
+
+ if( seg )
+ lines.push_back( seg );
+
+ return;
+}
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