.. image:: images/create_boundary_an_1.png
:align: center
-It is necessary to create a first analytical boundary by activation of the button "*New*". We shall have the choice between cylinder, sphere or cone. When the boundary will be validated, its name will appear in header of the second column.
+It is necessary to create a first analytical boundary by activation of the button "*New*". We shall have the choice between cylinder, sphere, cone or torus. When the boundary will be validated, its name will appear in header of the second column.
.. image:: images/create_boundary_an_2.png
:align: center
- Cylindre
- Sphere
- Cone, described by an axis and an angle or by two radius
+ - Torus
.. note::
The numerical values proposed by default take into account the geometry of the mesh.
.. index:: single: object browser
+Torus
+=====
+.. index:: single: torus
+
+The torus is defined by its centre, its axis, the revolution radius and the primary radius. The axis is defined by a vector. The standard of this vector is not inevitably equal to 1; also, its orientation has no importance. A name of boundary is automatically proposed: Boun_1, Boun_2, etc. This name can be modified. It must not already have been used for another boundary.
+
+.. image:: images/create_boundary_an_to.png
+ :align: center
+
Object browser
**************
At the end of this creation of boundaries, the object browser was enriched. We find all the boundaries created, identified there by their name, with the possibility of editing them.