doc/salome/gui/SMESH/files/aspect_ratio.htm

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  92 <h1>Aspect Ratio</h1>\r
  93 \r
  94 <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> \r
  95  quality criterion for mesh elements is defined as follows:</p>\r
  96 \r
  97 <p>&nbsp;</p>\r
  98 \r
  99 <ul type="disc" class="whs2">\r
 100         \r
 101         <li class=kadov-p><p>For a <span style="font-weight: bold;"><B>triangle</B></span> \r
 102  2D element consisting of 3 nodes the <span style="font-weight: bold;"><B>Aspect \r
 103  Ratio</B></span> is calculated by formula:\r
 104 <p>&nbsp;</p>\r
 105 \r
 106 <p><img src="../image21.gif" width="158px" height="110px" border="0" class="img_whs3"></p>\r
 107 \r
 108 <p><img src="../image23.gif" width="120px" height="48px" border="0" class="img_whs4"></p>\r
 109 \r
 110 <p>where :</p>\r
 111 \r
 112 <p>&nbsp;</p>\r
 113 \r
 114 <p><img src="../image27.gif" width="234px" height="96px" border="0" class="img_whs5"></p>\r
 115 \r
 116 <p>&nbsp;</p>\r
 117 \r
 118 <p>&nbsp;</p>\r
 119 </li>\r
 120 \r
 121         <li class=kadov-p><p class="whs5">For a <span style="font-weight: bold;"><B>quadrangle</B></span> \r
 122  2D element consisting of 4 nodes &nbsp;the \r
 123  <span style="font-weight: bold;"><B>Aspect Ratio </B></span>is the\r
 124  quality of the worst triange which can be built taking three nodes of\r
 125  the quadrangle. There are four triangles to consider:</p></li>\r
 126 \r
 127 <p><img src="../image138.gif" width="566px" border="0" class="img_whs6"></p>\r
 128 \r
 129 </ul>\r
 130 \r
 131 \r
 132 <p class=TODO>To apply the Aspect Ratio quality criterion to your mesh:</p>\r
 133 \r
 134 <p class=TODO>&nbsp;</p>\r
 135 \r
 136 <p class="whs7">1. Display your mesh in the viewer.</p>\r
 137 \r
 138 <p class="whs7">&nbsp;</p>\r
 139 \r
 140 <p class="whs7">2. Choose <span style="font-weight: bold;"><B>Controls \r
 141  &gt; Aspect Ratio </B></span>or click <img src="../image37.gif" width="25px" height="24px" border="0" class="img_whs8"> button in the toolbar. \r
 142  Your mesh will be displayed in the viewer with its elements colored according \r
 143  to the applied mesh quality control criterion:</p>\r
 144 \r
 145 <p class="whs7">&nbsp;</p>\r
 146 \r
 147 <p class="whs7"><img src="../image94.jpg" width="439px" height="313px" border="0" class="img_whs9"></p>\r
 148 \r
 149 <p class="whs7">&nbsp;</p>\r
 150 \r
 151 <p class="whs5"><span style="font-weight: bold;"><B>See Also</B></span> \r
 152  a sample TUI Script of an <a href="../quality_controls.htm#bookmark8">Aspect \r
 153  Ratio quality control</a> operation. &nbsp;</p>\r
 154 \r
 155 <p>&nbsp;</p>\r
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