mirror of
https://git.salome-platform.org/gitpub/modules/smesh.git
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186 lines
6.1 KiB
HTML
Executable File
186 lines
6.1 KiB
HTML
Executable File
<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">
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<html>
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<!--(==============================================================)-->
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<!--(Document created with RoboEditor. )============================-->
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<!--(==============================================================)-->
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<head>
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<title>Aspect Ratio</title>
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<!--(Meta)==========================================================-->
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<meta http-equiv=content-type content="text/html; charset=windows-1252">
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<meta name=generator content="RoboHELP by eHelp Corporation - www.ehelp.com">
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<meta name=generator-major-version content=0.1>
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<meta name=generator-minor-version content=1>
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<meta name=filetype content=kadov>
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<meta name=filetype-version content=1>
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<meta name=page-count content=1>
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<meta name=layout-height content=1101>
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<meta name=layout-width content=700>
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<!--(Links)=========================================================-->
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<link rel='stylesheet' href='../default_ns.css'>
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<script type="text/javascript" language="JavaScript" title="WebHelpSplitCss">
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<!--
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if (navigator.appName !="Netscape")
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{ document.write("<link rel='stylesheet' href='../default.css'>");}
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//-->
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</script>
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<style type="text/css">
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<!--
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img_whs1 {border-style: none; border: none; width: 30px; height: 30px; float: none;}
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ul.whs2 {list-style: disc;}
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p.whs3 {margin-left: 80px;}
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img_whs4 {border-style: none; border: none; width: 238px; height: 205px;}
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p.whs5 {margin-left: 0px;}
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img_whs6 {border-style: none; border: none; width: 226px; height: 70px;}
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p.whs7 {margin-left: 40px;}
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img_whs8 {border-style: none; border: none; width: 25px; height: 24px;}
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img_whs9 {border-style: none; border: none; width: 467px; height: 327px;}
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</style>
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<script type="text/javascript" language="JavaScript">
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strNSS +="</style>";
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document.write(strNSS);
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}
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//-->
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</script>
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<script type="text/javascript" language="JavaScript" title="WebHelpInlineScript">
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<!--
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function reDo() {
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if (innerWidth != origWidth || innerHeight != origHeight)
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location.reload();
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}
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if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) {
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onresize = reDo;
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}
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onerror = null;
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//-->
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</script>
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<style type="text/css">
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<!--
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div.WebHelpPopupMenu {position:absolute; left:0px; top:0px; z-index:4; visibility:hidden;}
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-->
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</style>
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<script type="text/javascript" language="javascript1.2" src="../whmsg.js"></script>
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<script type="text/javascript" language="javascript" src="../whver.js"></script>
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<script type="text/javascript" language="javascript1.2" src="../whproxy.js"></script>
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<script type="text/javascript" language="javascript1.2" src="../whutils.js"></script>
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<script type="text/javascript" language="javascript1.2" src="../whtopic.js"></script>
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</head>
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<!--(Body)==========================================================-->
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<body>
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<script type="text/javascript" language="javascript1.2">
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<!--
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if (window.gbWhTopic)
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{
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if (window.addTocInfo)
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{
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addTocInfo("SMESH module\nQuality controls\nAspect Ratio");
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addButton("show",BTN_TEXT,"Show","","","","",0,0,"","","");
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}
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if (window.writeBtnStyle)
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writeBtnStyle();
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writeIntopicBar(1);
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if (window.setRelStartPage)
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{
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setRelStartPage("../smesh.html");
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autoSync(0);
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sendSyncInfo();
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sendAveInfoOut();
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}
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}
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else
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//-->
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</script>
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<h1>Aspect Ratio</h1>
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<p><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs1"> The <span style="font-weight: bold;"><B>Aspect Ratio</B></span>
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quality criterion for mesh elements is defined as follows:</p>
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<p> </p>
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<ul type="disc" class="whs2">
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<li class=kadov-p><p>For a <span style="font-weight: bold;"><B>triangle</B></span>
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2D element consisting of 3 nodes a the <span style="font-weight: bold;"><B>Aspect
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Ratio</B></span> is calculated as the ratio of the length, h2, of the edge
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of this triangle, to the height, h1. The ratio of h2 to h1 is then multiplied
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by 3<span
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style="vertical-align: Super; font-size: 10pt;"><font size=2 style="font-size:10pt;">(1/2)</font></span> /2, so that
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a <20>perfect<63> element in the shape of an equilateral triangle will be equal
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to 1. This procedure is repeated for the remaining two edges of the triangle,
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and the largest value is retained as the <span style="font-weight: bold;"><B>Aspect
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Ratio</B></span> for the element.</p></li>
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</ul>
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<p> </p>
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<p class="whs3"><img src="../image26.jpg" width="238px" height="205px" border="0" class="img_whs4"></p>
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<p> </p>
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<p class="whs5"> </p>
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<ul type="disc" class="whs2">
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<li class=kadov-p><p class="whs5">For a <span style="font-weight: bold;"><B>quadrangle</B></span>
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2D element consisting of 4 nodes the
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<span style="font-weight: bold;"><B>Aspect Ratio </B></span>is the ratio of the
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element's longest side to its shortest side.</p></li>
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</ul>
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<p class="whs3"><img src="../image22.gif" width="226px" height="70px" border="0" class="img_whs6"></p>
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<p class="whs3"> </p>
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<p class=TODO>To apply the Aspect Ratio quality criterion to your mesh:</p>
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<p class=TODO> </p>
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<p class="whs7">1. Display your mesh in the viewer.</p>
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<p class="whs7"> </p>
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<p class="whs7">2. Choose <span style="font-weight: bold;"><B>Quality
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Controls > Aspect Ratio </B></span>or click <img src="../image37.gif" width="25px" height="24px" border="0" class="img_whs8"> button in the
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toolbar. Your mesh will be displayed in the viewer with its elements colored
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according to the applied mesh quality control criterion:</p>
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<p class="whs7"> </p>
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<p class="whs7"><img src="../image7.jpg" width="467px" height="327px" border="0" class="img_whs9"></p>
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<script type="text/javascript" language="javascript1.2">
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if (window.writeIntopicBar)
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//-->
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</script>
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</body>
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</html>
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