beginning of resize() command implementation.

1 files changed, 81 insertions, 1 deletions

diff --git a/src/CGAL_Nef_polyhedron_DxfData.cc b/src/CGAL_Nef_polyhedron_DxfData.cc
index 0d0b8f0..e642612 100644
--- a/src/CGAL_Nef_polyhedron_DxfData.cc
+++ b/src/CGAL_Nef_polyhedron_DxfData.cc
@@ -29,7 +29,6 @@
 #include "CGAL_Nef_polyhedron.h"
 #include "cgal.h"
 #include "cgalutils.h"
-#include "svg.h"
 
 #ifdef ENABLE_CGAL
 
@@ -89,4 +88,85 @@ std::string CGAL_Nef_polyhedron::dump() const
 		return std::string("Nef Polyhedron with dimension != 2 or 3");
 }
 
+// use a try/catch block around any calls to this
+void CGAL_Nef_polyhedron::convertTo2d()
+{
+	logstream log(5);
+	if (dim!=3) return;
+	assert(this->p3);
+	ZRemover zremover;
+	CGAL_Nef_polyhedron3::Volume_const_iterator i;
+	CGAL_Nef_polyhedron3::Shell_entry_const_iterator j;
+	CGAL_Nef_polyhedron3::SFace_const_handle sface_handle;
+	for ( i = this->p3->volumes_begin(); i != this->p3->volumes_end(); ++i ) {
+		log << "<!-- volume begin. mark: " << i->mark() << " -->\n";
+		for ( j = i->shells_begin(); j != i->shells_end(); ++j ) {
+			log << "<!-- shell. mark: " << i->mark() << " -->\n";
+			sface_handle = CGAL_Nef_polyhedron3::SFace_const_handle( j );
+			this->p3->visit_shell_objects( sface_handle , zremover );
+			log << "<!-- shell. end. -->\n";
+		}
+		log << "<!-- volume end. -->\n";
+	}
+	this->p3.reset();
+	this->p2 = zremover.output_nefpoly2d;
+	this->dim = 2;
+}
+
+
+std::vector<CGAL_Point_3> face2to3(
+	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::vector<CGAL_Point_3> result;
+	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 ) );
+			if (c1->mark()) {
+				CGAL_Point_3 tmp( target.x(), target.y(), 0 );
+				result.push_back( tmp );
+			}
+		}
+	}
+	return result;
+}
+
+
+// use a try/catch block around any calls to this
+void CGAL_Nef_polyhedron::convertTo3d()
+{
+	if (dim!=2) return;
+	assert(this->p2);
+  CGAL_Nef_polyhedron2::Explorer explorer = this->p2->explorer();
+  CGAL_Nef_polyhedron2::Explorer::Face_const_iterator i;
+
+	this->p3.reset( new CGAL_Nef_polyhedron3() );
+
+	for ( i = explorer.faces_begin(); i!= explorer.faces_end(); ++i ) {
+
+		CGAL_Nef_polyhedron2::Explorer::Halfedge_around_face_const_circulator c1
+			= explorer.face_cycle( i ), c2 ( c1 );
+		std::vector<CGAL_Point_3> body_pts = face2to3( c1, c2, explorer );
+		CGAL_Nef_polyhedron3 body( body_pts.begin(), body_pts.end() );
+
+		CGAL_Nef_polyhedron3 holes;
+	  CGAL_Nef_polyhedron2::Explorer::Hole_const_iterator j;
+		for ( j = explorer.holes_begin( i ); j!= explorer.holes_end( i ); ++j ) {
+			CGAL_Nef_polyhedron2::Explorer::Halfedge_around_face_const_circulator c3( j ), c4 ( c3 );
+			std::vector<CGAL_Point_3> hole_pts = face2to3( c3, c4, explorer );
+			CGAL_Nef_polyhedron3 hole( hole_pts.begin(), hole_pts.end() );
+			holes = holes.join( hole );
+		}
+
+		body = body.difference( holes );
+		*(this->p3) = this->p3->join( body );
+  }
+
+	this->p2.reset();
+	this->dim = 3;
+}
+
+
 #endif // ENABLE_CGAL