s already occupied   
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<td class="detailHeaderName">setVertexNormal</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td><td class="detailHeaderRule">&nbsp;</td>
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<code>public function setVertexNormal(p_nNormalID:int, p_nX:Number, p_nY:Number, p_nZ:Number):int</code><p>
   Add new point the specified index of the 