From: eap Date: Wed, 22 May 2013 14:55:42 +0000 (+0000) Subject: 0022106: EDF 2464 SMESH : Split quadrangles in 4 triangles X-Git-Tag: V7_3_0a1~422 X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=8ae0b0b315d6036bd642bc24d7e2f00e7a8f19d4;p=modules%2Fsmesh.git 0022106: EDF 2464 SMESH : Split quadrangles in 4 triangles --- diff --git a/doc/salome/gui/SMESH/images/a-cuttingofquadrangles.png b/doc/salome/gui/SMESH/images/a-cuttingofquadrangles.png index 48eaf88a1..1e533e64e 100755 Binary files a/doc/salome/gui/SMESH/images/a-cuttingofquadrangles.png and b/doc/salome/gui/SMESH/images/a-cuttingofquadrangles.png differ diff --git a/doc/salome/gui/SMESH/input/cutting_quadrangles.doc b/doc/salome/gui/SMESH/input/cutting_quadrangles.doc index 88fa5ae05..52b3b1ea6 100644 --- a/doc/salome/gui/SMESH/input/cutting_quadrangles.doc +++ b/doc/salome/gui/SMESH/input/cutting_quadrangles.doc @@ -2,13 +2,12 @@ \page cutting_quadrangles_page Cutting quadrangles -\n This operation allows to cut one or several quadrangle elements by -addition of a supplementary edge which will connect two opposite -corners. +\n This operation allows cutting one or several quadrangle elements +into two or four triangles. To cut quadrangles:
    -
  1. Display a mesh or a sub-mesh in the 3D viewer.
    2. +
  2. Display a mesh, a 2D sub-mesh or a group of faces in the 3D viewer.
  3. In the \b Modification menu select the Cutting of quadrangles item or click "Cutting of quadrangles" button in the toolbar. @@ -19,44 +18,45 @@ The following dialog box will appear: \image html a-cuttingofquadrangles.png -\par
      -
    • The main list contains the list of quadrangles. You can click on -an quadrangle in the 3D viewer and it will be highlighted (lock Shift -keyboard button to select several quadrangles). Click \b Add button and -the ID of this quadrangle will be added to the list. To remove a -selected element or elements from the list click \b Remove button. Sort -list button allows to sort the list of IDs. \b Filter button allows to -apply a definite filter to the selection of quadrangles.
      • -
    • Apply to all check box allows to modify the orientation of all -quadrangles of the currently displayed mesh or sub-mesh.
      • -
    • \b Preview - provides a preview of cutting in the viewer.
      • +
    • The main list contains the list of quadrangles selected for cutting. You can + click on an quadrangle in the 3D viewer and it will be highlighted (lock Shift + keyboard button to select several quadrangles). Click \b Add button and the ID of + this quadrangle will be added to the list. To remove a selected element or elements + from the list click \b Remove button. Sort list button allows to sort the + list of IDs. \b Filter button allows to apply a definite filter to the selection of + quadrangles.
      • +
    • Apply to all check box allows to cut all quadrangles of the selected mesh, + sub-mesh or group.
      • +
    • \b Preview provides a preview of cutting in the viewer. It is disabled for Cut + into 4 triangles as this cutting way implies no ambiguity.
      -
    • \b Criterion +
    • \b Criterion defines a cutting way.
        -
      • Use diagonal 1-3 and Use diagonal 2-4 allows to -specify the opposite corners which will be connected by the cutting -edge.
        • -
      • Use numeric functor - allows to choose a quality criterion - which will be optimized at the outcome of the operation. -
          -
        • Minimum diagonal - cuts by the shortest edge.
          • -
        • Aspect Ratio - cuts by the edge splitting the quadrangle -into triangles with optimal \ref aspect_ratio_page "Aspect Ratio". The reference value is 1.
          • -
        • Minimum Angle - cuts by the edge splitting the quadrangle -into triangles with optimal \ref minimum_angle_page "Minimum Angle". The reference value is 60 degrees.
          • -
        • Skew - cuts by the edge splitting the quadrangle -into triangles with optimal \ref skew_page "Skew". The reference value -is 0.0 degrees.
          • -
        +
      • Cut into 4 triangles selects cutting the quadrangle into four triangles by + inserting a new node at the center of quadrangle. The other options selects cutting + the quadrangle into two triangles by connecting nodes of either of the two diagonals. +
      • Use diagonal 1-3 and Use diagonal 2-4 allows to specify the + opposite corners which will be connected to form two new triangles.
        • +
      • Use numeric functor allows to choose a quality metric which will be + optimized when choosing a diagonal for cutting a quadrangle. +
          +
        • Minimum diagonal cuts by the shortest diagonal.
          • +
        • Aspect Ratio cuts by the diagonal splitting the quadrangle into + triangles with \ref aspect_ratio_page "Aspect Ratio" closer to 1.
          • +
        • Minimum Angle cuts by the diagonal splitting the quadrangle into + triangles with \ref minimum_angle_page "Minimum Angle" closer to 60 + degrees.
          • +
        • Skew cuts by the diagonal splitting the quadrangle into triangles + with \ref skew_page "Skew" closer to 0.0 degrees.
          • +
      • -
    • Select from - allows to choose a sub-mesh or an existing -group whose quadrangle elements will be automatically added to the -list.
      • +
    • Select from allows to choose a sub-mesh or an existing group whose + quadrangle elements will be automatically added to the main list.