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<p><code>#include &lt;<a class="el" href="../../db/df7/opennurbs__mesh_8h_source.html">opennurbs_mesh.h</a>&gt;</code></p>
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Public Member Functions</h2></td></tr>
<tr class="memitem:aa834a81c6136b8f6aef2d051661668e4"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dc/dd9/struct_o_n___mesh_topology_face.html#aa834a81c6136b8f6aef2d051661668e4">IsQuad</a> () const</td></tr>
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<tr class="memitem:ad9870f25d99e68b97a4d80665197a827"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dc/dd9/struct_o_n___mesh_topology_face.html#ad9870f25d99e68b97a4d80665197a827">IsTriangle</a> () const</td></tr>
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<tr class="memitem:ab79f89c92864173d3645558b0ee48eca"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dc/dd9/struct_o_n___mesh_topology_face.html#ab79f89c92864173d3645558b0ee48eca">IsValid</a> () const</td></tr>
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<tr class="memitem:a5ec879869d159cb3df486335da0b49ab"><td class="memItemLeft" align="right" valign="top">char&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dc/dd9/struct_o_n___mesh_topology_face.html#a5ec879869d159cb3df486335da0b49ab">m_reve</a> [4]</td></tr>
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<tr class="memitem:ac8e608bdba3fec88c18c57b9a8a65e62"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dc/dd9/struct_o_n___mesh_topology_face.html#ac8e608bdba3fec88c18c57b9a8a65e62">m_topei</a> [4]</td></tr>
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<h2 class="memtitle"><span class="permalink"><a href="#aa834a81c6136b8f6aef2d051661668e4">&#9670;&nbsp;</a></span>IsQuad()</h2>
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<td class="memname">bool ON_MeshTopologyFace::IsQuad </td>
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<p>Description: A topological mesh face is a valid quad if m_topei[0], m_topei[1], m_topei[2], and m_topei[3] are distinct edges. Returns: True if face is a quad. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad9870f25d99e68b97a4d80665197a827">&#9670;&nbsp;</a></span>IsTriangle()</h2>
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<p>Description: A topological mesh face is a valid triangle if m_topei[0], m_topei[1], m_topei[2] are distinct edges and m_topei[3]=m_topei[2]. Returns: True if face is a triangle. </p>
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<p>Description: A topological mesh face is valid if m_topei[0], m_topei[1], and m_topei[2] are mutually distinct, and m_topei[3] is either equal to m_topei[2] or mutually distinct from the first three indices. Returns: True if face is valid. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a5ec879869d159cb3df486335da0b49ab">&#9670;&nbsp;</a></span>m_reve</h2>
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<td class="memname">char ON_MeshTopologyFace::m_reve[4]</td>
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<p>If m_reve[i] is 0, then the orientation of the edge matches the orientation of the face. If m_reve[i] is 1, then the orientation of the edge is opposite that of the face. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ac8e608bdba3fec88c18c57b9a8a65e62">&#9670;&nbsp;</a></span>m_topei</h2>
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<p>m_topei[] = indices of the topological edges that bound the face. If m_topei[2] = m_topei[3], then the face is a triangle, otherwise the face is a quad.</p>
<p>NOTE WELL: The topological edge with index m_topei[k] ENDS at the vertex corresponding to <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[k]. So, ...</p>
<p>If the face is a quad, (<a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[2]!=<a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[3]), the topological edge with index m_topei[0] STARTS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[3] and ENDS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[0], the topological edge with index m_topei[1] STARTS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[0] and ENDS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[1], the topological edge with index m_topei[2] STARTS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[1] and ENDS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[2], and the topological edge with index m_topei[3] STARTS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[2] and ENDS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[3],</p>
<p>If the face is a triangle, (<a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[2]==<a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[3]), the topological edge with index m_topei[0] STARTS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[2] and ENDS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[0], the topological edge with index m_topei[1] STARTS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[0] and ENDS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[1], the topological edge with index m_topei[2] STARTS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[1] and ENDS at <a class="el" href="../../de/d91/class_o_n___mesh_face.html#a48215097327f42857c4761bebb6252e1" title="vertex index - vi[2]==vi[3] for tirangles ">ON_MeshFace.vi</a>[2]. </p>
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