X-Git-Url: http://git.salome-platform.org/gitweb/?p=modules%2Fsmesh.git;a=blobdiff_plain;f=doc%2Fsalome%2Fgui%2FSMESH%2Finput%2Fextrusion_along_path.doc;h=e391111d80f48271bdaa8c6c958780dcc9b9b9bb;hp=ce96f99d9b1efa82ec25b8b8d19db583fddd23b4;hb=88068fce89e10cb32b60ea51cae3440240d42e9f;hpb=79b1ac2b6df9117f16f11d444b1f165d477a1813 diff --git a/doc/salome/gui/SMESH/input/extrusion_along_path.doc b/doc/salome/gui/SMESH/input/extrusion_along_path.doc index ce96f99d9..e391111d8 100644 --- a/doc/salome/gui/SMESH/input/extrusion_along_path.doc +++ b/doc/salome/gui/SMESH/input/extrusion_along_path.doc @@ -4,13 +4,14 @@ \n In principle, Extrusion along a path works in the same way as \b Extrusion, the main difference is that we define not a vector, -but a path of extrusion which must be a meshed edge. To get an idea of -how this algorithm works, examine several examples, starting from the -most simple case of extrusion along a straight edge. In all examples -the same mesh will be extruded along different paths and with -different parameters. This sample 2D mesh has two quadrangle faces and -seven edges. Look at the picture, where white digits are the node -numbers and green are the element numbers: +but a path of extrusion which must be a 1D mesh or 1D sub-mesh. +To get an idea of how this algorithm works, examine several examples, +starting from the most simple case of extrusion along a straight edge. +In the examples the sample mesh will be extruded along different +paths and with different parameters. +This 2D mesh has two quadrangle faces and seven edges. Look +at the picture, where white digits are the node numbers and green +are the element numbers: \image html mesh_for_extr_along_path.png @@ -40,29 +41,17 @@ been selected as Start node. \image html curvi_angles_after.png
The same, but using angles {45, 45, 45, 0, -45, -45, -45}
-

Extrusion along a sub-mesh

+

Extrusion of a 2D face along a mesh built on a wire

-In this example the path mesh has been built on a wire (polyline with -six edges). The first edge of the wire was used as Shape (edge), node -#1 as Start node. The angles have been defined as {10, 10, 10}. The -middle edge (#4) of the initial mesh has been extruded. +In this example the path mesh has been built on a wire containing 3 +edges. Node 1 is a start node. Linear angle variation by 180 degrees +has also been applied. -\image html edge_wire_before.png +\image html extr_along_wire_before.png +
Meshed wire
-\image html edge_wire_after.png - -

Extrusion of 2d elements along a sub-mesh

- -This extrusion bases on the same path mesh as in the previous example -but the third edge of the wire was set as Shape (edge) and node -#4 as Start node. Please note, that the extrusion has been done -in direction from node #4 to node #3, i.e. against the wire -direction. In this example both faces of the initial mesh have been -extruded. - -\image html edge_wire_3d_before.png - -\image html edge_wire_3d_after.png +\image html extr_along_wire_after.png +
The resulting extrusion

Extrusion of 2d elements along a closed path

@@ -85,32 +74,39 @@ mesh.
  • From the \b Modification menu choose the Extrusion along a path item or click "Extrusion along a path" button in the toolbar. -\image html image101.gif +\image html image101.png
    "Extrusion along a path" button
    -The following dialog box will appear: +The following dialog common for line and planar elements will appear: \image html extrusion1.png - -\image html extrusion2.png
    • -
  • In the dialog box you should: +
  • In this dialog:
    • @@ -129,17 +125,22 @@ mesh in a helical fashion. You can set the values of angles at the right, add them to the list of angles at the left by pressing the "Add" button and remove them from the list by pressing the "Remove" button. -\image html image105.gif +\image html add.png
    "Add" button
    -\image html image106.gif +\image html remove.png
    "Remove" button
    +Linear variation of the angles option allows defining the angle of gradual rotation for the whole path. +At each step the shape will be rotated by angle/nb. of steps. + -
  • Click the \b Apply or \b OK button. Mesh edges will be extruded into + +
  • Click \b Apply or Apply and Close button to confirm the operation. +Mesh edges will be extruded into faces, faces into volumes. The external surface of the resulting 3d mesh (if faces have been extruded) is covered with faces, and corners with edges. If the path is closed, the resulting mesh can contain @@ -150,4 +151,4 @@ duplicated nodes and faces, because no sewing is done.
    See Also a sample TUI Script of an \ref tui_extrusion_along_path "Extrusion along a Path" operation. -*/ \ No newline at end of file +*/