<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN"> <html> <head> <title>Aspect Ratio</title> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="RoboHelp by eHelp Corporation www.ehelp.com"> <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:none; width:30px; height:30px; float:none; border-style:none; } ul.whs2 { list-style:disc; } p.whs3 { margin-left:80px; } img_whs4 { border:none; width:238px; height:205px; border-style:none; } p.whs5 { margin-left:0px; } img_whs6 { border:none; width:226px; height:70px; border-style:none; } p.whs7 { margin-left:40px; } img_whs8 { border:none; width:25px; height:24px; border-style:none; } img_whs9 { border:none; width:439px; height:313px; border-style:none; } --> </style><script type="text/javascript" language="JavaScript"> <!-- if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4)) { var strNSS = "<style type='text/css'>"; strNSS += "p.whs5 {margin-left:1pt; }"; 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><script type="text/javascript" language="javascript1.2"> <!-- if (window.gbWhTopic) { if (window.addTocInfo) { addTocInfo("MESH module\nQuality controls\nAspect ratio"); addButton("show",BTN_TEXT,"Show","","","","",0,0,"","",""); } if (window.writeBtnStyle) writeBtnStyle(); if (window.writeIntopicBar) writeIntopicBar(1); if (window.setRelStartPage) { setRelStartPage("../smesh.htm"); autoSync(1); sendSyncInfo(); sendAveInfoOut(); } } else if (window.gbIE4) document.location.reload(); //--> </script> <h1>Aspect Ratio</h1> <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> quality criterion for mesh elements is defined as follows:</p> <p> </p> <ul type="disc" class="whs2"> <li class=kadov-p><p>For a <span style="font-weight: bold;"><B>triangle</B></span> 2D element consisting of 3 nodes the <span style="font-weight: bold;"><B>Aspect Ratio</B></span> is calculated by formula: <p> </p> <p><img src="../image21.gif" width="158px" height="110px" border="0" class="img_whs3"></p> <p><img src="../image23.gif" width="120px" height="48px" border="0" class="img_whs4"></p> <p>where :</p> <p> </p> <p><img src="../image27.gif" width="234px" height="96px" border="0" class="img_whs5"></p> <p> </p> <p> </p> </li> <li class=kadov-p><p class="whs5">For a <span style="font-weight: bold;"><B>quadrangle</B></span> 2D element consisting of 4 nodes the <span style="font-weight: bold;"><B>Aspect Ratio </B></span>is the quality of the worst triange which can be built taking three nodes of the quadrangle. There are four triangles to consider:</p></li> <p><img src="../image138.gif" width="566px" border="0" class="img_whs6"></p> </ul> <p class=TODO>To apply the Aspect Ratio quality criterion to your mesh:</p> <p class=TODO> </p> <p class="whs7">1. Display your mesh in the viewer.</p> <p class="whs7"> </p> <p class="whs7">2. Choose <span style="font-weight: bold;"><B>Controls > Aspect Ratio </B></span>or click <img src="../image37.gif" width="25px" height="24px" border="0" class="img_whs8"> button in 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="whs7"> </p> <p class="whs7"><img src="../image94.jpg" width="439px" height="313px" border="0" class="img_whs9"></p> <p class="whs7"> </p> <p class="whs5"><span style="font-weight: bold;"><B>See Also</B></span> a sample TUI Script of an <a href="../quality_controls.htm#bookmark8">Aspect Ratio quality control</a> operation. </p> <p> </p> <script type="text/javascript" language="javascript1.2"> <!-- if (window.writeIntopicBar) writeIntopicBar(0); //--> </script> </body> </html>