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118 <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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119 that a face is not planar and is applied only to 2D elements with 4 nodes.
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120 This quality control criterion is based on a projection plane created
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123 <p class="whs2">1. bisecting the four element edges, </p>
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125 <p class="whs2">2. creating a point on the plane at the vector
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126 average of the corners, where the x-axis extends from the point to the
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127 bisector on edge 2. </p>
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129 <p class="whs3">The plane normal is in the direction of the
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130 cross product of the x-axis and the vector from the origin to the bisector
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131 of edge 3. Every corner of the quad will then be a distance
\93h
\94 from the
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132 plane. The length of each half edge is measured and the shortest length
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133 is assigned
\93l
\94. The warp angle is the arcsine of the ratio of the projection
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134 height
\93h
\94 to the half edge length
\93l
\94. </p>
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138 <p class="whs2"><img src="../image24.gif" width="496px" height="336px" border="0" class="img_whs4"></p>
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140 <p class="whs2"> </p>
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142 <p class=TODO> </p>
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144 <p class=TODO>To apply the Warping quality criterion to your mesh:</p>
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146 <p class=TODO> </p>
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148 <p class="whs2">1. Display your mesh in the viewer.</p>
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150 <p class="whs2"> </p>
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152 <p class="whs2">2. Choose <span style="font-weight: bold;"><B>Quality
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153 Controls > Warp </B></span>or click <img src="../image39.gif" width="23px" height="23px" border="0" class="img_whs5"> button of the toolbar.
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154 Your mesh will be displayed in the viewer with its elements colored according
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155 to the applied mesh quality control criterion:</p>
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157 <p class="whs2"> </p>
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159 <p class="whs2"><img src="../image9.jpg" width="467px" height="326px" border="0" class="img_whs6"></p>
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161 <p class="whs2"> </p>
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