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

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<title>Cutting quadrangles</title>
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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>
<p class="whs2"><img src="../pics/a-cuttingofquadrangles.png" x-maintain-ratio="TRUE" width="306px" height="525px" border="0" class="img_whs4"></p>
<p>&nbsp;</p>
<ul type="disc" class="whs5">
<li class=kadov-p><p class="whs6">The
main list<span style="font-weight: bold;"> <B></B></span>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).
<span style="margin-left: 0px; font-weight: bold;"><B>Click Add </B></span><span
style="margin-left: 0px;">button and the ID of this quadrangle will be
added to the list. To remove a selected element or elements from the list
click </span><span style="margin-left: 0px; font-weight: bold;"><B>Remove
</B></span><span style="margin-left: 0px;">button. </span><span style="margin-left: 0px; font-weight: bold;"><B>Sort
list </B></span><span style="margin-left: 0px;">button allows to sort the
list of IDs. </span><span style="margin-left: 0px; font-weight: bold;"><B>Filter
</B></span><span style="margin-left: 0px;">button allows to apply a definite
filter to the selection of quadrangles.</span></p></li>
<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="whs7">Preview
- <span style="font-weight: normal;">provides a preview of cutting in
the viewer.</span> </p></li>
<li class=kadov-p><p class="whs8">Criterion</p></li>
<li class=kadov-p><p class="whs6"><span
style="font-weight: bold;"><B>Use diagonal 1-3 </B></span>and<span style="font-weight: bold;"><B>
Use diagonal 2-4 </B></span>&nbsp;allows
to specify the opposite corners which will be connected by the cutting
edge.</p></li>
<li class=kadov-p><p class="whs7">Use
numeric factor - <span style="margin-left: 40px; font-weight: normal;">&nbsp;allows
to apply the operation only to those objects which meet the chosen criterion
(from the list of Quality Controls, i.e. Skew, Warping, Minimum Angle,
etc.)</span></p></li>
<li class=kadov-p><p class="whs9"><span style="font-weight: bold;"><B>Select
from -</B></span> 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>
<p class="whs2">&nbsp;</p>
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<col class="whs11">
<col class="whs11">
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<p class="whs9">&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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