refactor, cleanup, put code where it belongs, make simple logging class

1 files changed, 248 insertions, 0 deletions

diff --git a/src/svg.cc b/src/svg.cc
new file mode 100644
index 0000000..a40bd9f
--- /dev/null
+++ b/src/svg.cc
@@ -0,0 +1,248 @@
+#include "cgalutils.h"
+#include "svg.h"
+#include <boost/algorithm/string.hpp>
+#include <map>
+
+namespace OpenSCAD {
+
+std::string svg_header()
+{
+	std::stringstream out;
+	out << "<svg width='480px' height='480px'"
+		<< " xmlns='http://www.w3.org/2000/svg' version='1.1'>";
+	return out.str();
+}
+
+std::string svg_label(std::string s)
+{
+	std::stringstream out;
+	out << "<text fill='black' x='20' y='40' font-size='24'>" << s << "</text>";
+	return out.str();
+}
+
+std::string svg_border()
+{
+	std::stringstream out;
+	out << " <!-- border -->\n";
+	out << "  <polyline points='0,0 480,0 480,480 0,480'"
+		<< " style='fill:none;stroke:black' />\n";
+	out << " <!-- /border -->";
+	return out.str();
+}
+
+std::string svg_axes()
+{
+	std::stringstream out;
+	out << " <!-- axes -->\n";
+	out << "  <polyline points='10,455 10,475 10,465 18,465 2,465 10,465 14,461 6,469 10,465'"
+		<< " style='fill:none;stroke:black;' />\n";
+	out << " <!-- /axes -->";
+	return out.str();
+}
+
+CGAL_Point_2e project_svg_3to2( CGAL_Point_3 p, CGAL_Iso_cuboid_3 bbox )
+{
+	// do simple fake isometric projection
+	double x = CGAL::to_double( p.x() );
+	double y = CGAL::to_double( p.y() );
+	double z = CGAL::to_double( p.z() );
+	double screenw = 480;
+	double screenh = 480;
+	double borderw = screenw * 0.1618;
+	double borderh = screenh * 0.1618;
+	double vizw = screenw - borderw*2;
+	double vizh = screenh - borderh*2;
+	double bboxx = CGAL::to_double( bbox.xmax() - bbox.xmin() );
+	double bboxy = CGAL::to_double( bbox.ymax() - bbox.ymin() );
+	double bboxz = CGAL::to_double( bbox.zmax() - bbox.zmin() );
+	double xinbox = CGAL::to_double( p.x() ) - CGAL::to_double( bbox.xmin() );
+	double yinbox = CGAL::to_double( p.y() ) - CGAL::to_double( bbox.ymin() );
+	double zinbox = CGAL::to_double( p.z() ) - CGAL::to_double( bbox.zmin() );
+	double tx = borderw + ( xinbox / ( bboxx==0?1:bboxx ) ) * ( vizw );
+	double ty = screenh - borderh - ( zinbox / ( bboxz==0?1:bboxz ) ) * ( vizh );
+	tx += ( yinbox / ( bboxy==0?1:bboxy ) ) / 3;
+	ty -= ( yinbox / ( bboxy==0?1:bboxy ) ) / 3;
+	return CGAL_Point_2e( tx, ty );
+}
+
+CGAL_Point_2e project_svg_2to2( CGAL_Point_2e p, CGAL_Iso_rectangle_2e bbox )
+{
+	double x = CGAL::to_double( p.x() );
+	double y = CGAL::to_double( p.y() );
+	double screenw = 480;
+	double screenh = 480;
+	double borderw = screenw * 0.1618;
+	double borderh = screenh * 0.1618;
+	double vizw = screenw - borderw*2;
+	double vizh = screenh - borderh*2;
+	double bboxw = CGAL::to_double( bbox.xmax() - bbox.xmin() );
+	double bboxh = CGAL::to_double( bbox.ymax() - bbox.ymin() );
+	double xinbox = CGAL::to_double( p.x() ) - CGAL::to_double( bbox.xmin() );
+	double yinbox = CGAL::to_double( p.y() ) - CGAL::to_double( bbox.ymin() );
+	double tx = borderw + ( xinbox / ( bboxw==0?1:bboxw ) ) * ( vizw );
+	double ty = screenh - borderh - ( yinbox / ( bboxh==0?1:bboxh ) ) * ( vizh );
+/*	std::cout << "\nx, y " << x << "," << y << "\n";
+	std::cout << "bbw, bbh " << bboxw << "," << bboxh << "\n";
+	std::cout << "xinb, yinb " << xinbox << "," << yinbox << "\n";
+	std::cout << "vizw, vizh " << vizw <<  "," << vizh << "\n";
+	std::cout << "tx, ty " << tx << "," << ty << "\n";
+*/
+	return CGAL_Point_2e( tx, ty );
+}
+
+// for debugging, not necessarily pretty or useful for users.
+std::string dump_cgal_nef_polyhedron2_face_svg(
+	CGAL_Nef_polyhedron2::Explorer::Halfedge_around_face_const_circulator c1,
+	CGAL_Nef_polyhedron2::Explorer::Halfedge_around_face_const_circulator c2,
+	CGAL_Nef_polyhedron2::Explorer explorer,
+	std::string color,
+	bool mark,
+	CGAL_Iso_rectangle_2e bbox )
+{
+  std::stringstream out;
+	CGAL_For_all(c1, c2) {
+		if ( explorer.is_standard( explorer.target(c1) ) ) {
+			CGAL_Point_2e source = explorer.point( explorer.source( c1 ) );
+			CGAL_Point_2e target = explorer.point( explorer.target( c1 ) );
+			CGAL_Point_2e tp1 = project_svg_2to2( source, bbox );
+			CGAL_Point_2e tp2 = project_svg_2to2( target, bbox );
+			double mod=0;
+			if (color=="green") mod=10;
+			out << "      <!-- Halfedge. Mark: " << c1->mark() << " -->\n";
+      out << "       <line"
+			  << " x1='" << CGAL::to_double(tp1.x()) + mod << "'"
+			  << " y1='" << CGAL::to_double(tp1.y()) - mod << "'"
+			  << " x2='" << CGAL::to_double(tp2.x()) + mod << "'"
+			  << " y2='" << CGAL::to_double(tp2.y()) - mod << "'"
+			  << " stroke='" << color << "'";
+			if (mark) out << " stroke-dasharray='4 4' />\n";
+			else out << " />\n";
+			// crude "arrowhead" to indicate directionality
+			out << "       <circle"
+			  << " cx='" << CGAL::to_double(tp1.x()+ (tp2.x()-tp1.x())* 7/8) + mod << "'"
+			  << " cy='" << CGAL::to_double(tp1.y()+ (tp2.y()-tp1.y())* 7/8) - mod << "'"
+			  << " r='2'"
+			  << " fill='" << color << "' stroke='" << color << "' />\n";
+		}
+	}
+	return out.str();
+}
+
+std::string dump_svg( const CGAL_Nef_polyhedron2 &N )
+{
+  std::stringstream out;
+  CGAL_Nef_polyhedron2::Explorer explorer = N.explorer();
+
+	CGAL_Iso_rectangle_2e bbox = bounding_box( N );
+
+  CGAL_Nef_polyhedron2::Explorer::Face_const_iterator i;
+  out << " <svg y='" << svg_cursor << "' width='480px' height='480px' xmlns='http://www.w3.org/2000/svg' version='1.1'>\n";
+	out << svg_border() << "\n" << svg_axes() << "\n";
+	svg_cursor+=480;
+	if ((svg_cursor/480)%3==0) svg_cursor += 24;
+	if ((svg_cursor/480)%3==1) out << svg_label("old accumulator") << "\n";
+	if ((svg_cursor/480)%3==2) out << svg_label("new nef poly") << "\n";
+	if ((svg_cursor/480)%3==0) out << svg_label("new accumulator") << "\n";
+
+	for ( i = explorer.faces_begin(); i!= explorer.faces_end(); ++i ) {
+			out << "  <!-- face begin. mark: " << i->mark() << "  -->\n";
+			CGAL_Nef_polyhedron2::Explorer::Halfedge_around_face_const_circulator c1
+				= explorer.face_cycle( i ), c2 ( c1 );
+			out << dump_cgal_nef_polyhedron2_face_svg( c1, c2, explorer, "red", i->mark(), bbox );
+
+		  CGAL_Nef_polyhedron2::Explorer::Hole_const_iterator j;
+			for ( j = explorer.holes_begin( i ); j!= explorer.holes_end( i ); ++j ) {
+				out << "   <!-- hole begin. mark: " << j->mark() << " -->\n";
+				CGAL_Nef_polyhedron2::Explorer::Halfedge_around_face_const_circulator c3( j ), c4 ( c3 );
+				out << dump_cgal_nef_polyhedron2_face_svg( c3, c4, explorer, "green", j->mark(), bbox );
+				out << "   <!-- hole end -->\n";
+			}
+			out << "  <!-- face end -->\n";
+  }
+  out << "</svg>";
+	std::string tmp = out.str();
+	boost::replace_all( tmp, "'", "\"" );
+	return tmp;
+}
+
+
+// This uses the Shell Explorer pattern from the CGAL Manual to dump the 3d Nef Polyhedron information
+// http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3/Chapter_main.html#Subsection_29.7.2
+class NefPoly3_dumper_svg {
+public:
+	std::stringstream out;
+	CGAL_Iso_cuboid_3 bbox;
+	NefPoly3_dumper_svg(const CGAL_Nef_polyhedron3& N)
+	{
+		bbox = bounding_box( N );
+	}
+	void visit(CGAL_Nef_polyhedron3::Vertex_const_handle v) {}
+	void visit(CGAL_Nef_polyhedron3::Halfedge_const_handle ) {}
+	void visit(CGAL_Nef_polyhedron3::SHalfedge_const_handle ) {}
+	void visit(CGAL_Nef_polyhedron3::SHalfloop_const_handle shh ){}
+	void visit(CGAL_Nef_polyhedron3::SFace_const_handle ) {}
+	void visit( CGAL_Nef_polyhedron3::Halffacet_const_handle hfacet )
+	{
+		int contour_count = 0;
+		out << "  <!-- Halffacet. Mark: " << (*hfacet).mark() << " -->\n";
+		CGAL_Nef_polyhedron3::Halffacet_cycle_const_iterator i;
+		CGAL_forall_facet_cycles_of( i, hfacet ) {
+			CGAL_Nef_polyhedron3::SHalfloop_const_handle shl_handle;
+			out << "   <!-- Halffacet cycle: -->\n";
+			if ( contour_count == 0 ) {
+				out << "    <!-- Body contour:--> \n";
+			} else {
+				out << "    <!-- Hole contour:--> \n" ;
+			}
+			CGAL_Nef_polyhedron3::SHalfedge_around_facet_const_circulator c1(i), c2(c1);
+			CGAL_For_all( c1, c2 ) {
+				out << "     <line";
+				// don't know why we use source()->source(), except thats what CGAL does internally
+				CGAL_Point_3 source = c1->source()->source()->point();
+				CGAL_Point_3 target = c1->source()->target()->point();
+				CGAL_Point_2e tp1 = project_svg_3to2 ( source, bbox );
+				CGAL_Point_2e tp2 = project_svg_3to2 ( target, bbox );
+				out << " "
+					<< "x1='" << CGAL::to_double(tp1.x()) << "' "
+					<< "y1='" << CGAL::to_double(tp1.y()) << "' "
+					<< "x2='" << CGAL::to_double(tp2.x()) << "' "
+					<< "y2='" << CGAL::to_double(tp2.y()) << "' "
+				  << "stroke='red' />\n";
+			}
+			contour_count++;
+		} // next facet cycle (i.e. next contour)
+	} // visit()
+
+};
+
+
+std::string dump_svg( const CGAL_Nef_polyhedron3 &N )
+{
+  std::stringstream out;
+	out << svg_header << "\n" << svg_border() << "\n" << svg_axes() << "\n";
+	out << "<!--CGAL_Nef_polyhedron3 dump begin-->\n";
+
+  CGAL_Nef_polyhedron3::Volume_const_iterator c;
+  CGAL_forall_volumes(c,N) {
+    out << " <!--Processing volume...-->\n";
+    out << "  <!--Mark: " << (*c).mark() << "-->\n";
+    CGAL_Nef_polyhedron3::Shell_entry_const_iterator it;
+    CGAL_forall_shells_of(it,c) {
+      out << "  <!--Processing shell...-->\n";
+      NefPoly3_dumper_svg dumper_svg(N);
+      N.visit_shell_objects(CGAL_Nef_polyhedron3::SFace_const_handle(it), dumper_svg );
+			out << dumper_svg.out.str();
+      out << "  <!--Processing shell end-->\n";
+    }
+    out << " <!--Processing volume end-->\n";
+  }
+  out << "<!--CGAL_Nef_polyhedron3 dump end-->\n";
+	out << "</svg>";
+	std::string tmp = out.str();
+	boost::replace_all( tmp, "'", "\"" );
+  return tmp;
+}
+
+} // namespace
+
+