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d64c9cac70
Add class toUtf8
IPAL52708: TC7.6.0: name of copied group is wrong when Scale transform
Fix gp_Trsf definition in SMESH_MeshEditor_i::scale()
IPAL52704: TC7.6.0: "Modification of orientation" don't work on volumes
Fix SMESHGUI_MultiEditDlg::isIdValid()
+ Doc update
52 lines
2.8 KiB
Plaintext
52 lines
2.8 KiB
Plaintext
/*!
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\page cutting_quadrangles_page Cutting quadrangles
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This operation allows cutting one or several quadrangle elements into two or four triangles.
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<em>To cut quadrangles:</em>
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1) Select a mesh (and display it in the 3D Viewer if you are going to pick elements by mouse).
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2) In the \b Modification menu select the <b>Cutting of quadrangles</b> item or
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click <em>"Cutting of quadrangles"</em> button in the toolbar.
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\image html image82.png
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<center><em>"Cutting of quadrangles" button</em></center>
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The following dialog box will appear:
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\image html a-cuttingofquadrangles.png
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- The main list contains the list of quadrangles selected for cutting. You can
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click on a quadrangle in the 3D viewer and it will be highlighted (lock Shift
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keyboard button to select several quadrangles):
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- Click \b Add button and the ID of this quadrangle will be added to the list.
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- To remove a selected element or elements from the list click \b Remove button.
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- <b>Sort list</b> button allows sorting the list of IDs.
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- \b Filter button allows applying a definite \ref filtering_elements "filter"
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to the selection of quadrangles.
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- <b>Apply to all</b> check box allows cutting all quadrangles of the selected mesh.
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- \b Preview provides a preview of cutting in the viewer. It is disabled for <b>Cut into 4 triangles</b> as this cutting way implies no ambiguity.
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- \b Criterion defines the way of cutting:
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- <b>Cut into 4 triangles</b> allows cutting a quadrangle into four triangles by inserting a new node at the center of the quadrangle. The other options allow cutting a quadrangle into two triangles by connecting the nodes of a diagonal.
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- <b>Use diagonal 1-3</b> and <b>Use diagonal 2-4</b> allow specifying the opposite corners, which will be connected to form two new triangles.
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- <b>Use numeric functor</b> allows selecting in the field below a quality metric, which will be optimized when choosing a diagonal for cutting a quadrangle:
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- <b>Minimum diagonal</b> cuts by the shortest diagonal.
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- <b>Aspect Ratio</b> cuts by the diagonal splitting the quadrangle into triangles with \ref aspect_ratio_page "Aspect Ratio" closer to 1
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- <b>Minimum Angle</b> cuts by the diagonal splitting the quadrangle into triangles with \ref minimum_angle_page "Minimum Angle" closer to 60 degrees.
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- <b>Skew</b> cuts by the diagonal splitting the quadrangle into triangles with \ref skew_page "Skew" closer to 0.0 degrees.
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- <b>Select from</b> allows choosing a sub-mesh or an existing group, whose quadrangle elements then can be added to the main list.
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3) Click the \b Apply or <b>Apply and Close</b> button to confirm the operation.
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\image html image52.jpg "The chosen quadrangular element"
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\image html image51.jpg "Two resulting triangular elements"
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<br><b>See Also</b> a sample TUI Script of a
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\ref tui_cutting_quadrangles "Cutting Quadrangles" operation.
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*/
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