smesh/doc/salome/gui/SMESH/files/cutting_quadrangles.htm

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<h1>Cutting quadrangles</h1>
<p><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs1"> This operation allows to cut one or several quadrangle
elements by addition of a supplementary edge which will connect two opposite
corners. </p>
<p>&nbsp;</p>
<p class=TODO>To cut quadrangles:</p>
<p class="whs2">&nbsp;</p>
<p class="whs2">1. Display a mesh or a submesh in the 3D
viewer.</p>
<p class="whs2">2. In the <span style="font-weight: bold;"><B>Modification
</B></span>menu select the <span style="font-weight: bold;"><B>Cutting of quadrangles
</B></span>item or click <img src="../image82.gif" width="25px" height="22px" border="0" class="img_whs3"> button in the toolbar. The following
dialog box will appear:</p>
<p>&nbsp;</p>
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<p class="whs2"><img src="../pics/a-cuttingofquadrangles.png" x-maintain-ratio="TRUE" width="306px" height="525px" border="0" class="img_whs4"></p>
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<p>&nbsp;</p>
<ul type="disc" class="whs5">
<li class=kadov-p><p class="whs6"><span
style="font-weight: bold;"><B>The main list </B></span>shall contain the quadrangles
which will be cutted. You can click on an quadrangle in the 3D viewer
and it will be highlighted. After that click the <span style="font-weight: bold;"><B>Add
</B></span>button and the ID of this quadrangle will be added to the list.
To remove a selected element or elements from the list click the <span
style="font-weight: bold;"><B>Remove </B></span>button. The <span style="font-weight: bold;"><B>Sort
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</B></span>button allows to sort the list of IDs. The <span style="font-weight: bold;"><B>F</B></span><span
style="font-weight: bold;"><B>ilter </B></span>button allows to apply a definite
filter to selection of quadrangles.</p></li>
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<li class=kadov-p><p class="whs6"><span
style="font-weight: bold;"><B>Apply to all </B></span>radio button allows to
modify the orientation of all quadrangles of the currently displayed mesh
or submesh.</p></li>
<li class=kadov-p><p class="whs6"><span
style="font-weight: bold;"><B>Use diagonal 2-4 </B></span>radio button allows
to specify the opposite corners which will be connected by the cutting
edge.</p></li>
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<li class=kadov-p><p class="whs7">Preview
</p></li>
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<li class=kadov-p><p class="whs6"><span
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style="font-weight: bold;"><B>Criterion</B></span> menu allows to apply the operation
only to those object which meet the chosen criterion (from the list of
Quality Controls, i.e. Skew, Warping, Minimum Angle, etc.)</p></li>
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<li class=kadov-p><p class="whs6"><span
style="font-weight: bold;"><B>Select from </B></span>set of fields allows to
choose a submesh or an existing group whose quadrangle elements will be
automatically added to the list.</p></li>
</ul>
<p class="whs2">&nbsp;</p>
<p class="whs2">3. Click the <span style="font-weight: bold;"><B>Apply
</B></span>or <span style="font-weight: bold;"><B>OK </B></span>button to confirm
the operation.</p>
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<p class="whs2">&nbsp;</p>
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<table x-use-null-cells cellspacing="0" width="100%" class="whs8">
<col class="whs9">
<col class="whs9">
<tr valign="top" class="whs10">
<td width="50%" class="whs11">
<p><img src="../image52.jpg" width="353px" height="300px" border="0" class="img_whs12"></td>
<td width="50%" class="whs13">
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<p class="whs14">&nbsp;</p>
<p>&nbsp;&nbsp;<span style="font-weight: bold;"><B>See
Also</B></span> a sample TUI Script of a <a href="../modifying_meshes.htm#bookmark7">Cutting
Quadrangles</a> operation. &nbsp;</p>
<p>&nbsp;</p>
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