t for the face
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<p></p>
<span class="label">Returns</span>
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<td width="20"></td><td><code>int</code> &mdash;   The next free index or -1 it the index is already occupied
   </td>
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</div>
<a name="setFaceVertexIds()"></a>
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<td class="detailHeaderName">setFaceVertexIds</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td><td c