along with SALOME HYDRO module. If not, see <http://www.gnu.org/licenses/>.
#########################################
-Artificial objects
+Artificial objects
#########################################
-.. |axeDigue| image:: /../_static/axeDigue.png
+.. |axeDigue| image:: ../_static/axeDigue.png
:align: middle
-.. |creationDigue_1| image:: /../_static/creationDigue_1.png
+.. |creationDigue_1| image:: ../_static/creationDigue_1.png
:align: middle
-.. |modifModeProfile| image:: /../_static/modifModeProfile.png
+.. |modifModeProfile| image:: ../_static/modifModeProfile.png
:align: middle
-.. |creationDigue_2| image:: /../_static/creationDigue_2.png
+.. |creationDigue_2| image:: ../_static/creationDigue_2.png
:align: middle
-.. |creationDigue_3| image:: /../_static/creationDigue_3.png
+.. |creationDigue_3| image:: ../_static/creationDigue_3.png
:align: middle
-.. |altitudeDigue| image:: /../_static/altitudeDigue.png
+.. |altitudeDigue| image:: ../_static/altitudeDigue.png
:align: middle
-.. |polyline3D| image:: /../_static/polyline3D.png
+.. |polyline3D| image:: ../_static/polyline3D.png
:align: middle
-.. |artificialDigue| image:: /../_static/artificialDigue.png
+.. |artificialDigue| image:: ../_static/artificialDigue.png
:align: middle
-.. |zoomDigue| image:: /../_static/zoomDigue.png
+.. |zoomDigue| image:: ../_static/zoomDigue.png
:align: middle
-Artificial objects cover embankments and channels. Both object types are constructed on the same principle:
+Artificial objects cover embankments and channels. Both object types are constructed on the same principle:
- * A constant vertical section,
+ * A constant vertical section,
- * A 3D axis, this being a 3D polyline from which the section will be extruded.
+ * A 3D axis, this being a 3D polyline from which the section will be extruded.
The 3D axis is constructed from a horizontal polyline, to which will be associated a vertically-defined line
of altitude, which gives the Z-value as a function of the curvilinear abscissa of the polyline’s horizontal path.
The altitude line is either explicitly constructed or obtained by projecting the horizontal polyline
-onto a bathymetry field.
+onto a bathymetry field.
When the node altitudes are computed (Z interpolation), a specific treatment is applied to the nodes on the
-embankment: the altitude of the node is evaluated on the 3D geometric shape of the embankment, as defined above.
+embankment: the altitude of the node is evaluated on the 3D geometric shape of the embankment, as defined above.
Creating an embankment
======================
-To define the embankment's horizontal axis, an open, spline-type polyline is created with the polyline editor
-(context menu of the *POLYLINES* folder in the SALOME study tree).
+To define the embankment's horizontal axis, an open, spline-type polyline is created with the polyline editor
+(context menu of the *POLYLINES* folder in the SALOME study tree).
-Assign the name axeDigue (embankmentAxis) to this polyline.
+Assign the name axeDigue (embankmentAxis) to this polyline.
|axeDigue|
-The embankment section is created using the *Create profile* context menu of the *PROFILES* folder
-in the SALOME study tree.
+The embankment section is created using the *Create profile* context menu of the *PROFILES* folder
+in the SALOME study tree.
-This section is named *sectionDigue* (embankmentSection).
+This section is named *sectionDigue* (embankmentSection).
-The approximate shape of the section has to be drawn freehand;
+The approximate shape of the section has to be drawn freehand;
it will later be edited to put in the exact elevation parameters.
|creationDigue_1|
-To correct the node coordinates, you need to switch to Modification mode:
+To correct the node coordinates, you need to switch to Modification mode:
|modifModeProfile|
-The nodes can be block selected by grabbing them in a selection rectangle, in the graphic view.
+The nodes can be block selected by grabbing them in a selection rectangle, in the graphic view.
-They are displayed in a table above the graphic view.
+They are displayed in a table above the graphic view.
The nodes are reordered by clicking on the *Index* column title.
For the choice of Z-values, it is essential to know that the final altitude of a point on the embankment is obtained
from the cross-section at this point, by adding the elevation of the point on the section to the elevation of the
-section along the altitude profile. To be more specific, the calculation required is as follows:
+section along the altitude profile. To be more specific, the calculation required is as follows:
* Point **A** (x,y,0), whose altitude is required, is projected onto the *axeDigue* curve at a point **P** (x’,y’,0)
such that the straight line *AP* is perpendicular to the tangent to the curve of the embankment axis at **P**.
- The point **P** is at a horizontal distance *d* = distance(A,P) from the *axeDigue* curve.
+ The point **P** is at a horizontal distance *d* = distance(A,P) from the *axeDigue* curve.
* From the curvilinear coordinate **P** on *axeDigue*, we get a value of Z0 value on the line of altitude.
- This Z0 value corresponds to the zero-elevation level of the embankment section.
+ This Z0 value corresponds to the zero-elevation level of the embankment section.
* To obtain the final altitude in **P**, the elevation Z1 on the section is calculated at the abscissa point *d*.
- The final altitude is Z = Z0 +Z1.
+ The final altitude is Z = Z0 +Z1.
- * **Note:** this calculation method assumes a symmetrical cross-section with respect to x=0.
+ * **Note:** this calculation method assumes a symmetrical cross-section with respect to x=0.
-In this case, the line of altitude that will be defined corresponds to the vertex (i.e. top) of the cross-section. Hence, we create a symmetrical cross-section that is 20 metres wide, with fairly steep slopes.
+In this case, the line of altitude that will be defined corresponds to the vertex (i.e. top) of the cross-section. Hence, we create a symmetrical cross-section that is 20 metres wide, with fairly steep slopes.
|creationDigue_3|
-The embankment line of altitude still has to be created.
-It will be defined explicitly with the altitude of the two ends.
+The embankment line of altitude still has to be created.
+It will be defined explicitly with the altitude of the two ends.
-If the elevation of the embankment is variable, an approximate idea of its length is needed
-in order to construct an accurate altitude profile (a display function of the polyline lengths is missing).
+If the elevation of the embankment is variable, an approximate idea of its length is needed
+in order to construct an accurate altitude profile (a display function of the polyline lengths is missing).
-If more than two points are defined, the altitude is linearly interpolated between two points and,
-if the curve is longer than the altitude line, the Z values beyond the end point are taken
+If more than two points are defined, the altitude is linearly interpolated between two points and,
+if the curve is longer than the altitude line, the Z values beyond the end point are taken
at the elevation of this last point.
|altitudeDigue|
-The 3D axis has to be created next using the *Create polyline 3D* context menu of the POLYLINES 3D folder.
+The 3D axis has to be created next using the *Create polyline 3D* context menu of the POLYLINES 3D folder.
|polyline3D|
-The last step uses the *Create digue* context menu of the *ARTIFICIAL OBJECTS* folders.
+The last step uses the *Create digue* context menu of the *ARTIFICIAL OBJECTS* folders.
|artificialDigue|
-The equidistance parameter serves to optimise the precision of the section extrusion along the axis.
+The equidistance parameter serves to optimise the precision of the section extrusion along the axis.
- * If the value is too high in relation to the radius of axis curvature, the cross-section
- is offset from its centre line during extrusion.
+ * If the value is too high in relation to the radius of axis curvature, the cross-section
+ is offset from its centre line during extrusion.
- * If the value is too low, the computational time becomes long.
+ * If the value is too low, the computational time becomes long.
-Taking a value of about two or three times the width of the embankment is a reasonable first approximation.
+Taking a value of about two or three times the width of the embankment is a reasonable first approximation.
-The views of the embankment and its axis should then be overlaid to verify the result.
+The views of the embankment and its axis should then be overlaid to verify the result.
|zoomDigue|
-When the calculation case with the embankment is set up, the latter should be isolated in a specific region
-because it is preferable to mesh it in quadrangles using the *Quadrangle (Medial Axis projection)* algorithm.
+When the calculation case with the embankment is set up, the latter should be isolated in a specific region
+because it is preferable to mesh it in quadrangles using the *Quadrangle (Medial Axis projection)* algorithm.
-As the embankment is overlaid on natural terrain, the *ZMAX* option is generally the most logical choice for the altitude calculation.
+As the embankment is overlaid on natural terrain, the *ZMAX* option is generally the most logical choice for the altitude calculation.
Creating a channel
===================
-The canal channel is created in exactly same the same way as the embankment but using a specific menu,
+The canal channel is created in exactly same the same way as the embankment but using a specific menu,
*Create channel*, in the *ARTIFICIAL OBJECTS* folder.
-
-The section is bowl-shaped and the altitude is calculated using the same approach as for the embankment.
-When the calculation case with the channel is being set up, the channel should be isolated in a specific region
+The section is bowl-shaped and the altitude is calculated using the same approach as for the embankment.
+
+When the calculation case with the channel is being set up, the channel should be isolated in a specific region
as it is preferable to mesh it in quadrangles using the Quadrangle (Medial Axis projection) algorithm.
-
-For the altitude calculation, with the channel being in natural terrain,
+
+For the altitude calculation, with the channel being in natural terrain,
the *ZMIN* option is the most logical choice in most cases.
.. only:: html
-
- :ref:`ref_casParticuliers`
+
+ :ref:`ref_english_casParticuliers`
