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<p>Hello,</p>
<p><br>
</p>
<p>I want to reduce the number of triangles in a mesh (STL file). Here is my code:</p>
<pre class="default prettyprint prettyprinted"><span class="kwd">import</span><span class="pln"> vtk
filename </span><span class="pun">=</span><span class="pln"> </span><span class="str">'E://stl_file.stl'</span><span class="pln">
reader </span><span class="pun">=</span><span class="pln"> vtk</span><span class="pun">.</span><span class="pln">vtkSTLReader</span><span class="pun">()</span><span class="pln">
reader</span><span class="pun">.</span><span class="typ">SetFileName</span><span class="pun">(</span><span class="str">'filename.stl'</span><span class="pun">)</span><span class="pln">
</span><span class="com">##convert polygonal mesh into triangle mesh</span><span class="pln">
tri </span><span class="pun">=</span><span class="pln"> vtk</span><span class="pun">.</span><span class="pln">vtkTriangleFilter</span><span class="pun">()</span><span class="pln">
tri</span><span class="pun">.</span><span class="typ">SetInputConnection</span><span class="pun">(</span><span class="pln">reader</span><span class="pun">.</span><span class="typ">GetOutputPort</span><span class="pun">());</span><span class="pln">
</span><span class="com">##decimate triangle</span><span class="pln">
deci </span><span class="pun">=</span><span class="pln"> vtk</span><span class="pun">.</span><span class="pln">vtkDecimatePro</span><span class="pun">()</span><span class="pln">
deci</span><span class="pun">.</span><span class="typ">SetInputConnection</span><span class="pun">(</span><span class="pln">tri</span><span class="pun">.</span><span class="typ">GetOutputPort</span><span class="pun">())</span><span class="pln">
deci</span><span class="pun">.</span><span class="typ">SetTargetReduction</span><span class="pun">(</span><span class="lit">0.9</span><span class="pun">)</span><span class="pln">
deci</span><span class="pun">.</span><span class="typ">PreserveTopologyOn</span><span class="pun">()</span></pre>
<p>it seems to work (at least it runs without errors). Now how can I extract points and triangles of the mesh? </p>
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<p>Regards</p>
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