mirror of
https://git.salome-platform.org/gitpub/modules/smesh.git
synced 2024-11-15 10:08:34 +05:00
218 lines
7.2 KiB
HTML
218 lines
7.2 KiB
HTML
|
<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">
|
||
|
|
|
||
|
|
<html>
|
||
|
|
|
||
|
|
<!--(==============================================================)-->
|
||
|
|
<!--(Document created with RoboEditor. )============================-->
|
||
|
|
<!--(==============================================================)-->
|
||
|
|
|
||
|
|
<head>
|
||
|
|
|
||
|
|
<title>Smoothing</title>
|
||
|
|
|
||
|
|
<!--(Meta)==========================================================-->
|
||
|
|
|
||
|
|
<meta http-equiv=content-type content="text/html; charset=windows-1252">
|
||
|
|
<meta name=generator content="RoboHELP by eHelp Corporation - www.ehelp.com">
|
||
|
|
<meta name=generator-major-version content=0.1>
|
||
|
|
<meta name=generator-minor-version content=1>
|
||
|
|
<meta name=filetype content=kadov>
|
||
|
|
<meta name=filetype-version content=1>
|
||
|
|
<meta name=page-count content=1>
|
||
|
|
<meta name=layout-height content=1451>
|
||
|
|
<meta name=layout-width content=740>
|
||
|
|
|
||
|
|
|
||
|
|
<!--(Links)=========================================================-->
|
||
|
|
|
||
|
|
<link rel='stylesheet' href='../default_ns.css'>
|
||
|
|
<script type="text/javascript" language="JavaScript" title="WebHelpSplitCss">
|
||
|
|
<!--
|
||
|
|
if (navigator.appName !="Netscape")
|
||
|
|
{ document.write("<link rel='stylesheet' href='../default.css'>");}
|
||
|
|
//-->
|
||
|
|
</script>
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
img_whs1 {border-style: none; border: none; width: 30px; height: 30px; float: none;}
|
||
|
|
p.whs2 {margin-left: 40px;}
|
||
|
|
img_whs3 {border-style: none; border: none; width: 24px; height: 25px;}
|
||
|
|
img_whs4 {border-style: none; border: none; width: 319px; height: 369px;}
|
||
|
|
ul.whs5 {list-style: disc;}
|
||
|
|
p.whs6 {margin-left: 40px; font-weight: normal;}
|
||
|
|
p.whs7 {font-weight: bold;}
|
||
|
|
p.whs8 {margin-left: 80px;}
|
||
|
|
img_whs9 {border-style: none; border: none; width: 527px; height: 281px;}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
<script type="text/javascript" language="JavaScript" title="WebHelpInlineScript">
|
||
|
|
<!--
|
||
|
|
function reDo() {
|
||
|
|
if (innerWidth != origWidth || innerHeight != origHeight)
|
||
|
|
location.reload();
|
||
|
|
}
|
||
|
|
if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) {
|
||
|
|
origWidth = innerWidth;
|
||
|
|
origHeight = innerHeight;
|
||
|
|
onresize = reDo;
|
||
|
|
}
|
||
|
|
onerror = null;
|
||
|
|
//-->
|
||
|
|
</script>
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
div.WebHelpPopupMenu {position:absolute; left:0px; top:0px; z-index:4; visibility:hidden;}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
<script type="text/javascript" language="javascript1.2" src="../whmsg.js"></script>
|
||
|
|
<script type="text/javascript" language="javascript" src="../whver.js"></script>
|
||
|
|
<script type="text/javascript" language="javascript1.2" src="../whproxy.js"></script>
|
||
|
|
<script type="text/javascript" language="javascript1.2" src="../whutils.js"></script>
|
||
|
|
<script type="text/javascript" language="javascript1.2" src="../whtopic.js"></script>
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<!--(Body)==========================================================-->
|
||
|
|
|
||
|
|
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<script type="text/javascript" language="javascript1.2">
|
||
|
|
<!--
|
||
|
|
if (window.gbWhTopic)
|
||
|
|
{
|
||
|
|
if (window.addTocInfo)
|
||
|
|
{
|
||
|
|
addTocInfo("SMESH module\nModifying meshes\nSmoothing");
|
||
|
|
addButton("show",BTN_TEXT,"Show","","","","",0,0,"","","");
|
||
|
|
|
||
|
|
}
|
||
|
|
if (window.writeBtnStyle)
|
||
|
|
writeBtnStyle();
|
||
|
|
|
||
|
|
if (window.writeIntopicBar)
|
||
|
|
writeIntopicBar(1);
|
||
|
|
|
||
|
|
if (window.setRelStartPage)
|
||
|
|
{
|
||
|
|
setRelStartPage("../smesh.htm");
|
||
|
|
|
||
|
|
autoSync(0);
|
||
|
|
sendSyncInfo();
|
||
|
|
sendAveInfoOut();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
document.location.reload();
|
||
|
|
//-->
|
||
|
|
</script>
|
||
|
|
<h1>Smoothing</h1>
|
||
|
|
|
||
|
|
<p><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs1"> Smoothing is used to adjust the locations of element
|
||
|
|
corners (nodes) to reduce distortions in these elements.</p>
|
||
|
|
|
||
|
|
<p> </p>
|
||
|
|
|
||
|
|
<p class=TODO>To apply smoothing to the elements of your mesh:</p>
|
||
|
|
|
||
|
|
<p class=TODO> </p>
|
||
|
|
|
||
|
|
<p class="whs2">1. Display a mesh or a submesh in the 3D
|
||
|
|
viewer.</p>
|
||
|
|
|
||
|
|
<p class="whs2"> </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>Smoothing </B></span>item
|
||
|
|
or click <img src="../image84.gif" width="24px" height="25px" border="0" class="img_whs3"> button in the toolbar. The following dialog box
|
||
|
|
will appear:</p>
|
||
|
|
|
||
|
|
<p> </p>
|
||
|
|
|
||
|
|
<p class="whs2"><img src="../image85.gif" width="319px" height="369px" border="0" class="img_whs4"></p>
|
||
|
|
|
||
|
|
<p class="whs2"> </p>
|
||
|
|
|
||
|
|
<p class="whs2">This dialog box contains the following fields
|
||
|
|
which should be specified:</p>
|
||
|
|
|
||
|
|
<p> </p>
|
||
|
|
|
||
|
|
<ul type="disc" class="whs5">
|
||
|
|
|
||
|
|
<li class=kadov-p><p class="whs6"><span
|
||
|
|
style="font-weight: bold;"><B>Id Elements </B></span><span>field allows to specify
|
||
|
|
the elements which should be smoothed by selecting them in the 3D viewer.
|
||
|
|
Note: to select several elements press </span><span style="font-weight: bold;"><B>Shift
|
||
|
|
</B></span><span>button.</span></p></li>
|
||
|
|
|
||
|
|
<ul type="disc" class="whs5">
|
||
|
|
|
||
|
|
<li class=kadov-p><p class="whs7">Smoothing is applied
|
||
|
|
to the whole mesh or its part</p></li>
|
||
|
|
|
||
|
|
<li class=kadov-p><p><span style="font-weight: bold;"><B>Fixed nodes
|
||
|
|
ids</B></span>: some nodes keep their location during smoothing. If a mesh
|
||
|
|
is built on a geometry shape, the nodes built on geometrical edges are
|
||
|
|
always fixed. If smoothing is applied to a part of a mesh then the boundary
|
||
|
|
nodes of an elements set are also fixed. Any other nodes may be additionally
|
||
|
|
fixed.</p></li>
|
||
|
|
|
||
|
|
<li class=kadov-p><p> </p></li>
|
||
|
|
|
||
|
|
<li class=kadov-p><p><span style="font-weight: bold;"><B>Smoothing
|
||
|
|
method</B></span>:</p></li>
|
||
|
|
|
||
|
|
<ul type="disc" class="whs5">
|
||
|
|
|
||
|
|
<li class=kadov-p><p><span style="font-weight: bold;"><B>Laplacian</B></span>
|
||
|
|
smoothing pulls a node toward the center of surrounding nodes directly
|
||
|
|
connected to that node along an element edge. Centroidal smoothing pulls
|
||
|
|
a node toward the element-area-weighted centroid of the surrounding elements.
|
||
|
|
Typically, the Laplacian method will produce the mesh with the least element
|
||
|
|
distortion. It is also the faster method. </p></li>
|
||
|
|
|
||
|
|
<li class=kadov-p><p><span style="font-weight: bold;"><B>Centroidal</B></span>
|
||
|
|
smoothing usually produces a mesh that has more uniform element sizes.
|
||
|
|
Both methods produce good results with "free" meshes.</p></li>
|
||
|
|
</ul>
|
||
|
|
</ul>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<p class="whs8"><img src="../image83.gif" width="527px" height="281px" border="0" class="img_whs9"></p>
|
||
|
|
|
||
|
|
<ul type="disc" class="whs5">
|
||
|
|
|
||
|
|
<li class=kadov-p><p class="whs6"><span
|
||
|
|
style="font-weight: bold;"><B>Iteration limit: </B></span>both of the smoothing
|
||
|
|
methods use an iterative procedure to converge toward a smoothed mesh.
|
||
|
|
All nodes are smoothed according to one of the techniques shown above.
|
||
|
|
Then the smoothing is reevaluated with the updated nodal locations. This
|
||
|
|
process continues until the maximum number of iterations has been exceeded,
|
||
|
|
or all elements has aspect ratio less or equal than the specified one.</p></li>
|
||
|
|
|
||
|
|
<li class=kadov-p><p class="whs6"><span
|
||
|
|
style="font-weight: bold;"><B>Max. aspect ratio</B></span>.</p></li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<p class="whs2"> </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> </p>
|
||
|
|
|
||
|
|
<p> </p>
|
||
|
|
|
||
|
|
<p> </p>
|
||
|
|
|
||
|
|
<script type="text/javascript" language="javascript1.2">
|
||
|
|
<!--
|
||
|
|
if (window.writeIntopicBar)
|
||
|
|
writeIntopicBar(0);
|
||
|
|
//-->
|
||
|
|
</script>
|
||
|
|
</body>
|
||
|
|
|
||
|
|
</html>
|