SALOME documentation central

Symmetry


This geometrical operation allows to perform a symmetrical copy of your mesh or some of its elements.

To create a symmtrical copy of the mesh:

  1. From the Modification menu choose Transformation -> Symmetry item or click "Symmetry" button in the toolbar.

    symmetry.png

    Symmetry button

    One of the following dialogs will appear:

    It is possible to mirror a mesh or some of its elements through:

    symmetry1.png

    a point (defined by a point and a vector)

    symmetry2.png

    an axis

    symmetry3.png

    a plane (defined by a point and a normal to the plane)

  2. In the dialog:

    • specify the IDs of the elements for the symmetry operation:

      • Select the whole mesh, submesh or group activating this checkbox; or
      • choose mesh elements with the mouse in the 3D Viewer. It is possible to select a whole area with a mouse frame; or
      • input the element IDs directly in ID Elements field. The selected elements will be highlighted in the viewer; or
      • apply Filters. Set filter button allows to apply a filter to the selection of elements. See more about filters in the Selection filter library page.

    • depending on the nature of the mirror object:
      • if the mesh is mirrored through a point, specify the coordinates of the point
      • if the mesh is mirrored through an axis:

        • specify the cooordinates of the start Point of the axis vector;
        • specify the axis Vector through the coordinates of its end point with respect to the coordinates of the start point;

      • if the mesh is mirrored through a plane:

        • specify the cooordinates of the Point lying on the plane;
        • specify the axis Vector through the coordinates of its end point with respect to the coordinates of the start point.

      • specify the conditions of symmetry operation:
        • activate Move elements radio button to create the source mesh (or elements) at the new location and erase it from the previous location;
        • activate Copy elements radio button to create the source mesh (or elements) at the new location, but leave it at the previous location, the source mesh will be considered one and single mesh with the result of the rotation;
        • activate Create as new mesh radio button to leave the source mesh (or elements) at its previous location and create a new mesh at the new location, the new mesh appears in the Object Browser with the default name MeshName_rotated (it is possible to change this name in the adjacent box);
        • activate Copy groups checkbox to copy the groups of elements of the source mesh to the newly created mesh.
    • Click Apply or Apply and Close button to confirm the operation.


    See Also a sample TUI Script of a Symmetry operation.


Copyright © 2007-2008 CEA/DEN, EDF R&D, OPEN CASCADE
Copyright © 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN, CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS