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<p>
Test each triangle for clockwisdom, fix if needed. The result should be a TIN with consistent vertex ordering, such that all face normals point up rather than down, that is, counter-clockwise.     </td>
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<a class="anchor" name="3566cc387be76130277e64a6ed79321e"></a><!-- doxytag: member="vtTin::FindAltitudeAtPoint" ref="3566cc387be76130277e64a6ed79321e" args="(const FPoint3 &amp;p3, float &amp;fAltitude, bool bTrue=false, int iCultureFlags=0, FPoint3 *vNormal=NULL) const " --><p>
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          <td class="md" nowrap valign="top">bool vtTin::FindAltitudeAtPoint           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const <a class="el" href="classFPoint3.html">FPoint3</a> &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>p3</em>, </td>
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          <td class="md" nowrap>float &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>fAltitude</em>, </td>
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          <td class="md" nowrap>bool&nbsp;</td>
          <td class="mdname" nowrap> <em>bTrue</em> = <code>false</code>, </td>
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          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>iCultureFlags</em> = <code>0</code>, </td>
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          <td class="md" nowrap><a class="el" href="classFPoint3.html">FPoint3</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>vNormal</em> = <code>NULL</code></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"> const<code> [inline, virtual]</code></td>
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<p>
Given a point in world coordinates, determine the elevation at that point.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>p3</em>&nbsp;</td><td>The point to test. Only the X and Z values are used. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>fAltitude</em>&nbsp;</td><td>The resulting elevation at that point, by reference. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>bTrue</em>&nbsp;</td><td>True to test true elevation. False to test the displayed elevation (possibly exaggerated.) </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>iCultureFlags</em>&nbsp;</td><td>Pass 0 to test only the heightfield itself, non-zero to test any culture objects which may be sitting on the heightfield. Values include:<ul>
<li>CE_STRUCTURES Test structures on the ground.</li><li>CE_ROADS Test roads on the ground.</li><li>CE_ALL Test everything on the ground. </li></ul>
</td></tr>
    <tr><td valign="top"></td><td valign="top"><em>vNormal</em>&nbsp;</td><td>If you supply a pointer to a vector, it will be set to the upward-pointing surface normal at the ground point.</td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>true if successful, false if there was nothing found at that point. </dd></dl>

<p>
Implements <a class="el" href="classvtHeightField3d.html#36bdc3c5983331f833972c9d287f2072">vtHeightField3d</a>.    </td>
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<a class="anchor" name="553b8c8508632951b2035cca505cf83c"></a><!-- doxytag: member="vtTin::GetTriMaxEdgeLength" ref="553b8c8508632951b2035cca505cf83c" args="(int iTri) const " --><p>
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          <td class="md" nowrap valign="top">double vtTin::GetTriMaxEdgeLength           </td>
          <td class="md" valign="top">(&nbsp;</td>
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          <td class="mdname1" valign="top" nowrap> <em>iTri</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const</td>
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<p>
Return the length of the longest edge of a specific triangle.     </td>
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<a class="anchor" name="5a1430445ecd0bb6a215ff8b78ac4ac4"></a><!-- doxytag: member="vtTin::MergeSharedVerts" ref="5a1430445ecd0bb6a215ff8b78ac4ac4" args="(bool progress_callback(int)=NULL)" --><p>
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          <td class="md" nowrap valign="top">void vtTin::MergeSharedVerts           </td>
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          <td class="md" nowrap valign="top">bool &nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>progress_callback</em>(int) = <code>NULL</code>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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<p>
Combine all vertices which are at the same location. By removing these redundant vertices, the mesh will consume less space in memory and on disk.     </td>
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<a class="anchor" name="a762f0bdb3efe216d7eea56d25ed0cc1"></a><!-- doxytag: member="vtTin::Read" ref="a762f0bdb3efe216d7eea56d25ed0cc1" args="(const char *fname)" --><p>
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          <td class="md" nowrap valign="top">bool vtTin::Read           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const char *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>fname</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Read the TIN from a file. This can either be an old-style or new-style .tin format (custom VTP format)     </td>
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<a class="anchor" name="bfa7b3880154c2ae1ddde6f68fe6038b"></a><!-- doxytag: member="vtTin::ReadDXF" ref="bfa7b3880154c2ae1ddde6f68fe6038b" args="(const char *fname, bool progress_callback(int)=NULL)" --><p>
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          <td class="md" nowrap valign="top">bool vtTin::ReadDXF           </td>
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          <td class="md" nowrap valign="top">const char *&nbsp;</td>
          <td class="mdname" nowrap> <em>fname</em>, </td>
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