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<h1>vtkExtractBlock Class Reference</h1><!-- doxytag: class="vtkExtractBlock" --><!-- doxytag: inherits="vtkMultiBlockDataSetAlgorithm" --><code>#include &lt;<a class="el" href="a04313.html">vtkExtractBlock.h</a>&gt;</code>
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Inheritance diagram for vtkExtractBlock:</div>
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<p><center><img src="a09618.png" border="0" usemap="#a09619" alt="Inheritance graph"></center>
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<area shape="rect" href="a01056.html" title="Superclass for algorithms that produce only vtkMultiBlockDataSet as output." alt="" coords="5,229,216,256"><area shape="rect" href="a00101.html" title="Superclass for all sources, filters, and sinks in VTK." alt="" coords="61,155,160,181"><area shape="rect" href="a01084.html" title="abstract base class for most VTK objects" alt="" coords="71,80,151,107"><area shape="rect" href="a01085.html" title="abstract base class for most VTK objects" alt="" coords="56,5,165,32"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>
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Collaboration diagram for vtkExtractBlock:</div>
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<p><center><img src="a09620.png" border="0" usemap="#a09621" alt="Collaboration graph"></center>
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<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>

<p>
<a href="a09622.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
extracts blocks from a multiblock dataset. 
<p>
<a class="el" href="a00498.html" title="extracts blocks from a multiblock dataset.">vtkExtractBlock</a> is a filter that extracts blocks from a multiblock dataset. Each node in the multi-block tree is identified by an <code>index</code>. The index can be obtained by performing a preorder traversal of the tree (including empty nodes). eg. A(B (D, E), C(F, G)). Inorder traversal yields: A, B, D, E, C, F, G Index of A is 0, while index of C is 4.<p>
<dl class="user" compact><dt><b>Tests:</b></dt><dd><a class="el" href="c2_vtk_t_5.html#c2_vtk_t_vtkExtractBlock">vtkExtractBlock (Tests)</a> </dd></dl>

<p>Definition at line <a class="el" href="a04313.html#l00037">37</a> of file <a class="el" href="a04313.html">vtkExtractBlock.h</a>.</p>
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<tr><td colspan="2"><br><h2>Public Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <br>
<a class="el" href="a01056.html">vtkMultiBlockDataSetAlgorithm</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#290d3b15e7f441b588ef18815ab193ed">Superclass</a></td></tr>

<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual const char *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#9806ccacaaca3bbe943ce1161b3f5003">GetClassName</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#48781e2a7e8af98e5279905c77afa06d">IsA</a> (const char *type)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#9cd2d4bc50974cf50f067bd6563d3e63">PrintSelf</a> (ostream &amp;os, <a class="el" href="a00869.html">vtkIndent</a> indent)</td></tr>

<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#0129d2bf4c7844a89ab7e84cf09edadb">AddIndex</a> (unsigned int index)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#be4c85ed514b71169b7857a7a1eb5d5d">RemoveIndex</a> (unsigned int index)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#1826088445ec3e28957b01800e356b22">RemoveAllIndices</a> ()</td></tr>

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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#91ff123cb7c54cc5602fdd8831c066d5">SetPruneOutput</a> (int)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#dac8d2cb1ef2a73c9e2ea76cd1f76651">GetPruneOutput</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#0585be5b1fa7d544ba4d31801f4d0746">PruneOutputOn</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#1719800cdbd937f7d903312b9e266a03">PruneOutputOff</a> ()</td></tr>

<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00498.html">vtkExtractBlock</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#62d876b4b8f90e57d52a15b2761cae05">New</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">static int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#531e9310f55ed0f2f564ad08913873f5">IsTypeOf</a> (const char *type)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00498.html">vtkExtractBlock</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#d6cdfe3b368d472b7786fadd66991696">SafeDownCast</a> (<a class="el" href="a01084.html">vtkObject</a> *o)</td></tr>

<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#41a9209571a1a073e4a754491e532422">vtkExtractBlock</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#dd5641a652a721bfdbbbaea9fb03dcce">~vtkExtractBlock</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#92badfbdb37a8e57c2c52efadfd605af">RequestData</a> (<a class="el" href="a00872.html">vtkInformation</a> *, <a class="el" href="a00895.html">vtkInformationVector</a> **, <a class="el" href="a00895.html">vtkInformationVector</a> *)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Implementation of the algorithm.  <a href="#92badfbdb37a8e57c2c52efadfd605af"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#8619ad7688d2bab8ab5cde238ffeb307">CopySubTree</a> (<a class="el" href="a00300.html">vtkCompositeDataIterator</a> *loc, <a class="el" href="a01055.html">vtkMultiBlockDataSet</a> *output, <a class="el" href="a01055.html">vtkMultiBlockDataSet</a> *input)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Extract subtree.  <a href="#8619ad7688d2bab8ab5cde238ffeb307"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#fb7f56ce58eba69d5f96442acd0e17d6">Prune</a> (<a class="el" href="a01055.html">vtkMultiBlockDataSet</a> *mblock)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#c843861d88eef78b490bab640f106ce9">Prune</a> (<a class="el" href="a01061.html">vtkMultiPieceDataSet</a> *mblock)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#108af6784d600ffad49cd9b725974503">Prune</a> (<a class="el" href="a00362.html">vtkDataObject</a> *mblock)</td></tr>

<tr><td colspan="2"><br><h2>Static Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00881.html">vtkInformationIntegerKey</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#2fb3f0aa588d0bfb79cba69e5ea2656a">DONT_PRUNE</a> ()</td></tr>

<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00498.html#7fa1decf9aacf7cceb7957182644cd9c">PruneOutput</a></td></tr>

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<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="290d3b15e7f441b588ef18815ab193ed"></a><!-- doxytag: member="vtkExtractBlock::Superclass" ref="290d3b15e7f441b588ef18815ab193ed" args="" -->
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          <td class="memname">typedef <a class="el" href="a01056.html">vtkMultiBlockDataSetAlgorithm</a> <a class="el" href="a01056.html">vtkExtractBlock::Superclass</a>          </td>
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<p>

<p>Reimplemented from <a class="el" href="a01056.html#253e3f953c56f5ae93324af201b98a69">vtkMultiBlockDataSetAlgorithm</a>.</p>

<p>Definition at line <a class="el" href="a04313.html#l00041">41</a> of file <a class="el" href="a04313.html">vtkExtractBlock.h</a>.</p>

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<hr><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" name="41a9209571a1a073e4a754491e532422"></a><!-- doxytag: member="vtkExtractBlock::vtkExtractBlock" ref="41a9209571a1a073e4a754491e532422" args="()" -->
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          <td class="memname">vtkExtractBlock::vtkExtractBlock           </td>
          <td>(</td>
          <td class="paramname">          </td>
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          <td><code> [protected]</code></td>
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<a class="anchor" name="dd5641a652a721bfdbbbaea9fb03dcce"></a><!-- doxytag: member="vtkExtractBlock::~vtkExtractBlock" ref="dd5641a652a721bfdbbbaea9fb03dcce" args="()" -->
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          <td class="memname">vtkExtractBlock::~vtkExtractBlock           </td>
          <td>(</td>
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          <td>&nbsp;)&nbsp;</td>
          <td><code> [protected]</code></td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="62d876b4b8f90e57d52a15b2761cae05"></a><!-- doxytag: member="vtkExtractBlock::New" ref="62d876b4b8f90e57d52a15b2761cae05" args="()" -->
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          <td class="memname">static <a class="el" href="a00498.html">vtkExtractBlock</a>* vtkExtractBlock::New           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td><code> [static]</code></td>
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Create an object with Debug turned off, modified time initialized to zero, and reference counting on. 
<p>Reimplemented from <a class="el" href="a01056.html#3969cba5243b2054f7b376a8929cb4ef">vtkMultiBlockDataSetAlgorithm</a>.</p>

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<a class="anchor" name="9806ccacaaca3bbe943ce1161b3f5003"></a><!-- doxytag: member="vtkExtractBlock::GetClassName" ref="9806ccacaaca3bbe943ce1161b3f5003" args="()" -->
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          <td class="memname">virtual const char* vtkExtractBlock::GetClassName           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td><code> [virtual]</code></td>
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<p>Reimplemented from <a class="el" href="a01056.html#c04c231e3000f78502047277b5da7114">vtkMultiBlockDataSetAlgorithm</a>.</p>

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<a class="anchor" name="531e9310f55ed0f2f564ad08913873f5"></a><!-- doxytag: member="vtkExtractBlock::IsTypeOf" ref="531e9310f55ed0f2f564ad08913873f5" args="(const char *type)" -->
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          <td class="memname">static int vtkExtractBlock::IsTypeOf           </td>
          <td>(</td>
          <td class="paramtype">const char *&nbsp;</td>
          <td class="paramname"> <em>name</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td><code> [static]</code></td>
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Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h. 
<p>Reimplemented from <a class="el" href="a01056.html#eb2de15a4c14d62b3f61d80c20a80d20">vtkMultiBlockDataSetAlgorithm</a>.</p>

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<a class="anchor" name="48781e2a7e8af98e5279905c77afa06d"></a><!-- doxytag: member="vtkExtractBlock::IsA" ref="48781e2a7e8af98e5279905c77afa06d" args="(const char *type)" -->
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          <td class="memname">virtual int vtkExtractBlock::IsA           </td>
          <td>(</td>
          <td class="paramtype">const char *&nbsp;</td>
          <td class="paramname"> <em>name</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td><code> [virtual]</code></td>
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Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h. 
<p>Reimplemented from <a class="el" href="a01056.html#a825103d56465e48d5ff621b955e6a75">vtkMultiBlockDataSetAlgorithm</a>.</p>

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<a class="anchor" name="d6cdfe3b368d472b7786fadd66991696"></a><!-- doxytag: member="vtkExtractBlock::SafeDownCast" ref="d6cdfe3b368d472b7786fadd66991696" args="(vtkObject *o)" -->
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          <td class="memname">static <a class="el" href="a00498.html">vtkExtractBlock</a>* vtkExtractBlock::SafeDownCast           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a01084.html">vtkObject</a> *&nbsp;</td>
          <td class="paramname"> <em>o</em>          </td>
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<p>Reimplemented from <a class="el" href="a01056.html#5954f9ab346f4400ab9a8dadac229d67">vtkMultiBlockDataSetAlgorithm</a>.</p>

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<a class="anchor" name="9cd2d4bc50974cf50f067bd6563d3e63"></a><!-- doxytag: member="vtkExtractBlock::PrintSelf" ref="9cd2d4bc50974cf50f067bd6563d3e63" args="(ostream &amp;os, vtkIndent indent)" -->
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          <td class="memname">void vtkExtractBlock::PrintSelf           </td>
          <td>(</td>
          <td class="paramtype">ostream &amp;&nbsp;</td>
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          <td>)</td>
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Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use <a class="el" href="a01085.html#edadf6378465fd81c2592ef64262e2a5">Print()</a> instead) but used in the hierarchical print process to combine the output of several classes. 
<p>Reimplemented from <a class="el" href="a01056.html#4e90d52a7205702d0a00ec23ce6ea318">vtkMultiBlockDataSetAlgorithm</a>.</p>

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<a class="anchor" name="0129d2bf4c7844a89ab7e84cf09edadb"></a><!-- doxytag: member="vtkExtractBlock::AddIndex" ref="0129d2bf4c7844a89ab7e84cf09edadb" args="(unsigned int index)" -->
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          <td>(</td>
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          <td>&nbsp;)&nbsp;</td>
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Select the block indices to extract. Each node in the multi-block tree is identified by an <code>index</code>. The index can be obtained by performing a preorder traversal of the tree (including empty nodes). eg. A(B (D, E), C(F, G)). Inorder traversal yields: A, B, D, E, C, F, G Index of A is 0, while index of C is 4. 
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<a class="anchor" name="be4c85ed514b71169b7857a7a1eb5d5d"></a><!-- doxytag: member="vtkExtractBlock::RemoveIndex" ref="be4c85ed514b71169b7857a7a1eb5d5d" args="(unsigned int index)" -->
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          <td class="memname">void vtkExtractBlock::RemoveIndex           </td>
          <td>(</td>
          <td class="paramtype">unsigned int&nbsp;</td>
          <td class="paramname"> <em>index</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td></td>
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Select the block indices to extract. Each node in the multi-block tree is identified by an <code>index</code>. The index can be obtained by performing a preorder traversal of the tree (including empty nodes). eg. A(B (D, E), C(F, G)). Inorder traversal yields: A, B, D, E, C, F, G Index of A is 0, while index of C is 4. 
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<a class="anchor" name="1826088445ec3e28957b01800e356b22"></a><!-- doxytag: member="vtkExtractBlock::RemoveAllIndices" ref="1826088445ec3e28957b01800e356b22" args="()" -->
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Select the block indices to extract. Each node in the multi-block tree is identified by an <code>index</code>. The index can be obtained by performing a preorder traversal of the tree (including empty nodes). eg. A(B (D, E), C(F, G)). Inorder traversal yields: A, B, D, E, C, F, G Index of A is 0, while index of C is 4. 
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<a class="anchor" name="91ff123cb7c54cc5602fdd8831c066d5"></a><!-- doxytag: member="vtkExtractBlock::SetPruneOutput" ref="91ff123cb7c54cc5602fdd8831c066d5" args="(int)" -->
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When set, the output mutliblock dataset will be pruned to remove empty nodes. On by default. 
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<a class="anchor" name="dac8d2cb1ef2a73c9e2ea76cd1f76651"></a><!-- doxytag: member="vtkExtractBlock::GetPruneOutput" ref="dac8d2cb1ef2a73c9e2ea76cd1f76651" args="()" -->
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When set, the output mutliblock dataset will be pruned to remove empty nodes. On by default. 
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<a class="anchor" name="0585be5b1fa7d544ba4d31801f4d0746"></a><!-- doxytag: member="vtkExtractBlock::PruneOutputOn" ref="0585be5b1fa7d544ba4d31801f4d0746" args="()" -->
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When set, the output mutliblock dataset will be pruned to remove empty nodes. On by default. 
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<a class="anchor" name="1719800cdbd937f7d903312b9e266a03"></a><!-- doxytag: member="vtkExtractBlock::PruneOutputOff" ref="1719800cdbd937f7d903312b9e266a03" args="()" -->
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When set, the output mutliblock dataset will be pruned to remove empty nodes. On by default. 
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<a class="anchor" name="2fb3f0aa588d0bfb79cba69e5ea2656a"></a><!-- doxytag: member="vtkExtractBlock::DONT_PRUNE" ref="2fb3f0aa588d0bfb79cba69e5ea2656a" args="()" -->
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Internal key, used to avoid pruning of a branch. 
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<a class="anchor" name="92badfbdb37a8e57c2c52efadfd605af"></a><!-- doxytag: member="vtkExtractBlock::RequestData" ref="92badfbdb37a8e57c2c52efadfd605af" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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Implementation of the algorithm. 
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<p>Reimplemented from <a class="el" href="a01056.html#40c518cc34a3c85721b45158977638c4">vtkMultiBlockDataSetAlgorithm</a>.</p>

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<a class="anchor" name="8619ad7688d2bab8ab5cde238ffeb307"></a><!-- doxytag: member="vtkExtractBlock::CopySubTree" ref="8619ad7688d2bab8ab5cde238ffeb307" args="(vtkCompositeDataIterator *loc, vtkMultiBlockDataSet *output, vtkMultiBlockDataSet *input)" -->
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Extract subtree. 
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<a class="anchor" name="fb7f56ce58eba69d5f96442acd0e17d6"></a><!-- doxytag: member="vtkExtractBlock::Prune" ref="fb7f56ce58eba69d5f96442acd0e17d6" args="(vtkMultiBlockDataSet *mblock)" -->
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<a class="anchor" name="c843861d88eef78b490bab640f106ce9"></a><!-- doxytag: member="vtkExtractBlock::Prune" ref="c843861d88eef78b490bab640f106ce9" args="(vtkMultiPieceDataSet *mblock)" -->
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<a class="anchor" name="108af6784d600ffad49cd9b725974503"></a><!-- doxytag: member="vtkExtractBlock::Prune" ref="108af6784d600ffad49cd9b725974503" args="(vtkDataObject *mblock)" -->
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<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="7fa1decf9aacf7cceb7957182644cd9c"></a><!-- doxytag: member="vtkExtractBlock::PruneOutput" ref="7fa1decf9aacf7cceb7957182644cd9c" args="" -->
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          <td class="memname">int <a class="el" href="a00498.html#7fa1decf9aacf7cceb7957182644cd9c">vtkExtractBlock::PruneOutput</a><code> [protected]</code>          </td>
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<p>Definition at line <a class="el" href="a04313.html#l00084">84</a> of file <a class="el" href="a04313.html">vtkExtractBlock.h</a>.</p>

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<hr>The documentation for this class was generated from the following file:<ul>
<li>dox/Graphics/<a class="el" href="a04313.html">vtkExtractBlock.h</a></ul>
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<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 19:02:18 2009 for VTK by&nbsp;
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