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

172 lines
5.4 KiB
HTML
Raw Normal View History

2004-06-18 14:55:35 +06:00
<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">
<html>
<!--(==============================================================)-->
<!--(Document created with RoboEditor. )============================-->
<!--(==============================================================)-->
<head>
<title>Warp</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=1161>
<meta name=layout-width content=700>
<!--(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; float: none; width: 30px; height: 30px;}
p.whs2 {margin-left: 40px;}
p.whs3 {margin-left: 0px;}
img_whs4 {border-style: none; border: none; width: 496px; height: 336px;}
img_whs5 {border-style: none; border: none; width: 23px; height: 23px;}
img_whs6 {border-style: none; border: none; width: 467px; height: 326px;}
-->
</style>
<script type="text/javascript" language="JavaScript">
<!--
if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4))
{
var strNSS = "<style type='text/css'>";
strNSS += "p.whs3 {margin-left:1; }";
strNSS +="</style>";
document.write(strNSS);
}
//-->
</script>
<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\nQuality controls\nWarping");
addButton("show",BTN_TEXT,"Show","","","","",0,0,"","","");
}
if (window.writeBtnStyle)
writeBtnStyle();
if (window.writeIntopicBar)
writeIntopicBar(1);
if (window.setRelStartPage)
{
setRelStartPage("../smesh.html");
autoSync(0);
sendSyncInfo();
sendAveInfoOut();
}
}
else
document.location.reload();
//-->
</script>
<h1>Warping</h1>
<p><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs1"> <span style="font-weight: bold;"><B>Warping</B></span> indicates
that a face is not planar and is applied only to 2D elements with 4 nodes.
This quality control criterion is based on a projection plane created
by:</p>
<p class="whs2">1. bisecting the four element edges, </p>
<p class="whs2">2. creating a point on the plane at the vector
average of the corners, where the x-axis extends from the point to the
bisector on edge 2. </p>
<p class="whs3">The plane normal is in the direction of the
cross product of the x-axis and the vector from the origin to the bisector
of edge 3. Every corner of the quad will then be a distance <20>h<EFBFBD> from the
plane. The length of each half edge is measured and the shortest length
is assigned <20>l<EFBFBD>. The warp angle is the arcsine of the ratio of the projection
height <20>h<EFBFBD> to the half edge length <20>l<EFBFBD>. </p>
<p>&nbsp;</p>
<p class="whs2"><img src="../image24.gif" width="496px" height="336px" border="0" class="img_whs4"></p>
<p class="whs2">&nbsp;</p>
<p class=TODO>&nbsp;</p>
<p class=TODO>To apply the Warping quality criterion to your mesh:</p>
<p class=TODO>&nbsp;</p>
<p class="whs2">1. Display your mesh in the viewer.</p>
<p class="whs2">&nbsp;</p>
<p class="whs2">2. Choose <span style="font-weight: bold;"><B>Quality
Controls &gt; Warp </B></span>or click <img src="../image39.gif" width="23px" height="23px" border="0" class="img_whs5"> button of the toolbar.
Your mesh will be displayed in the viewer with its elements colored according
to the applied mesh quality control criterion:</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><img src="../image9.jpg" width="467px" height="326px" border="0" class="img_whs6"></p>
<p class="whs2">&nbsp;</p>
<script type="text/javascript" language="javascript1.2">
<!--
if (window.writeIntopicBar)
writeIntopicBar(0);
//-->
</script>
</body>
</html>