Add documentation for Nef Polyhedron Viewer.

Nef_3/doc/Nef_3/Nef_3.txt

@@ -425,6 +425,18 @@ the symbolical value, large but finite, for the size of the infimaximal box.
 
 \cgalExample{Nef_3/extended_kernel.cpp}
 
+\subsection Nef_3DrawNefPolyhedron Draw a Nef Polyhedron
+
+A nef polyhedron can be visualised by calling the \link PkgDrawNef3 CGAL::draw<Nef_3>() \endlink function as shown in the following example. This function opens a new window showing the given Nef Polyhedron.
+
+\cgalExample{Nef_3/draw_nef_3.cpp}
+
+This function requires CGAL_Qt5, and is only available if the flag CGAL_USE_BASIC_VIEWER is defined at compile time.
+
+\cgalFigureBegin{fig_draw_nef_polyhedron, draw_nef_3.png}
+Result of the run  of the draw_nef_3 program. A window shows the nef polyhedron and allows to navigate through the 3D scene.
+\cgalFigureEnd
+
 \section Nef_3File File I/O
 
 \anchor sectionNef_3IO

Nef_3/doc/Nef_3/PackageDescription.txt

@@ -3,6 +3,13 @@
 /// \defgroup PkgNef3IOFunctions I/O Functions
 /// \ingroup PkgNef3Ref
 
+/*! Draw.
+  \code
+  #include <CGAL/draw_nef_3.h>
+  \endcode
+*/
+/// \defgroup PkgDrawNef3 Draw a Nef Polyhedron
+/// \ingroup PkgNef3Ref
 
 /*!
 \addtogroup PkgNef3Ref
@@ -64,5 +71,8 @@ a simple OpenGL visualization for debugging and illustrations.
 - \link PkgNef3IOFunctions `CGAL::operator<<()` \endlink
 - \link PkgNef3IOFunctions `CGAL::operator>>()` \endlink
 
+\cgalCRPSection{Draw a Nef Polyhedron}
+- \link PkgDrawNef3 CGAL::draw<Nef3>() \endlink
+
 */
 

Nef_3/doc/Nef_3/dependencies

@@ -11,3 +11,4 @@ Number_types
 BGL
 Surface_mesh
 Polygon_mesh_processing
+GraphicsView

Nef_3/doc/Nef_3/examples.txt

@@ -17,4 +17,5 @@
 \example Nef_3/topological_operations.cpp
 \example Nef_3/transformation.cpp
 \example Nef_3/nef_3_to_surface_mesh.cpp
+\example Nef_3/draw_nef_3.cpp
 */

Nef_3/package_info/Nef_3/dependencies

@@ -7,6 +7,7 @@ Circulator
 Distance_2
 Distance_3
 Filtered_kernel
+GraphicsView
 HalfedgeDS
 Hash_map
 Homogeneous_kernel

Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/Periodic_2_triangulation_2.txt

@@ -398,6 +398,8 @@ in the unit rectangle. The tests were done on an Intel i7 @ 2.67GHz.
 
 A 2D periodic triangulation can be visualized by calling the \link PkgDrawPeriodic2Triangulation2 CGAL::draw<P2T2>() \endlink function as shown in the following example. This function opens a new window showing the given Periodic Triangulation. Elements of the periodic triangulation can be viewed in four different modes:
 
+\cgalExample{Periodic_2_triangulation_2/draw_periodic_2_triangulation_2.cpp}
+
 - <B>STORED</B> Display all geometric primitives as they are stored in Triangulation_data_structure_2;
 - <B>UNIQUE</B> Display only one representative of each geometric primitive even if the triangulation is computed in multiply sheeted covering space;
 - <B>STORED_COVER_DOMAIN</B> Same as STORED but also display  all primitives whose intersection with the original domain of the current covering space is non-empty;