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https://git.salome-platform.org/gitpub/modules/smesh.git
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166 lines
5.6 KiB
HTML
Executable File
166 lines
5.6 KiB
HTML
Executable File
<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">
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<html>
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<head>
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<title>Aspect Ratio</title>
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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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<link rel="stylesheet" href="../default_ns.css"><script type="text/javascript" language="JavaScript" title="WebHelpSplitCss">
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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:none; width:30px; height:30px; float:none; border-style: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:none; width:238px; height:205px; border-style:none; }
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p.whs5 { margin-left:0px; }
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img_whs6 { border:none; width:226px; height:70px; border-style:none; }
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p.whs7 { margin-left:40px; }
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img_whs8 { border:none; width:25px; height:24px; border-style:none; }
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img_whs9 { border:none; width:439px; height:313px; border-style:none; }
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-->
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</style><script type="text/javascript" language="JavaScript">
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if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4))
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{
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var strNSS = "<style type='text/css'>";
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strNSS += "p.whs5 {margin-left:1pt; }";
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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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origWidth = innerWidth;
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origHeight = innerHeight;
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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><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><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("MESH 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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if (window.writeIntopicBar)
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writeIntopicBar(1);
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if (window.setRelStartPage)
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{
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setRelStartPage("../smesh.htm");
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autoSync(1);
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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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if (window.gbIE4)
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document.location.reload();
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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>Controls
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> Aspect Ratio </B></span>or click <img src="../image37.gif" width="25px" height="24px" border="0" class="img_whs8"> button in the toolbar.
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Your mesh will be displayed in the viewer with its elements colored according
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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="../image94.jpg" width="439px" height="313px" border="0" class="img_whs9"></p>
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<p class="whs7"> </p>
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<p class="whs5"><span style="font-weight: bold;"><B>See Also</B></span>
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a sample TUI Script of an <a href="../quality_controls.htm#bookmark8">Aspect
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Ratio quality control</a> operation. </p>
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<p> </p>
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<script type="text/javascript" language="javascript1.2">
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if (window.writeIntopicBar)
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writeIntopicBar(0);
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//-->
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</script>
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</body>
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</html>
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