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https://git.salome-platform.org/gitpub/modules/smesh.git
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152 lines
4.9 KiB
HTML
Executable File
152 lines
4.9 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>Warp</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; float:none; width:30px; height:30px; border-style:none; }
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p.whs2 { margin-left:40px; }
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p.whs3 { margin-left:0px; }
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img_whs4 { border:none; width:496px; height:336px; border-style:none; }
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img_whs5 { border:none; width:23px; height:23px; border-style:none; }
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img_whs6 { border:none; width:405px; height:308px; 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.whs3 {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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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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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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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\nWarping");
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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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else
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if (window.gbIE4)
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//-->
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</script>
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<h1>Warping</h1>
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<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
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that a face is not planar and is applied only to 2D elements with 4 nodes.
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This quality control criterion is based on a projection plane created
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by:</p>
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<p class="whs2">1. bisecting the four element edges, </p>
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<p class="whs2">2. creating a point on the plane at the vector
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average of the corners, where the x-axis extends from the point to the
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bisector on edge 2. </p>
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<p class="whs3">The plane normal is in the direction of the
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cross product of the x-axis and the vector from the origin to the bisector
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of edge 3. Every corner of the quad will then be a distance <20>h<EFBFBD> from the
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plane. The length of each half edge is measured and the shortest length
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is assigned <20>l<EFBFBD>. The warp angle is the arcsine of the ratio of the projection
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height <20>h<EFBFBD> to the half edge length <20>l<EFBFBD>. </p>
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<p> </p>
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<p class="whs2"><img src="../image24.gif" width="496px" height="336px" border="0" class="img_whs4"></p>
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<p class="whs2"> </p>
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<p class=TODO> </p>
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<p class=TODO>To apply the Warping quality criterion to your mesh:</p>
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<p class=TODO> </p>
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<p class="whs2">1. Display your mesh in the viewer.</p>
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<p class="whs2"> </p>
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<p class="whs2">2. Choose <span style="font-weight: bold;"><B>Controls
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> Warp </B></span>or click <img src="../image39.gif" width="23px" height="23px" border="0" class="img_whs5"> button of the toolbar. Your mesh
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will be displayed in the viewer with its elements colored according to
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the applied mesh quality control criterion:</p>
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<p class="whs2"> </p>
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<p class="whs2"><img src="../image97.jpg" width="405px" height="308px" border="0" class="img_whs6"></p>
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<p class="whs2"> </p>
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<p class="whs3"><span style="font-weight: bold;"><B>See Also</B></span>
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a sample TUI Script of a <a href="../quality_controls.htm#bookmark10">Warping
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quality control</a> operation. </p>
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<p> </p>
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<p class="whs2"> </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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