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<h1>vtkPlanesIntersection Class Reference</h1><!-- doxytag: class="vtkPlanesIntersection" --><!-- doxytag: inherits="vtkPlanes" --><code>#include <<a class="el" href="a04112.html">vtkPlanesIntersection.h</a>></code>
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Inheritance diagram for vtkPlanesIntersection:</div>
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Collaboration diagram for vtkPlanesIntersection:</div>
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<p><center><img src="a13052.png" border="0" usemap="#a13053" alt="Collaboration graph"></center>
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<a href="a13054.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
A <a class="el" href="a01227.html" title="A vtkPlanesIntersection object is a vtkPlanes object that can compute whether the...">vtkPlanesIntersection</a> object is a <a class="el" href="a01226.html" title="implicit function for convex set of planes">vtkPlanes</a> object that can compute whether the arbitrary convex region bounded by it's planes intersects an axis-aligned box.
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A subclass of <a class="el" href="a01226.html" title="implicit function for convex set of planes">vtkPlanes</a>, this class determines whether it intersects an axis aligned box. This is motivated by the need to intersect the axis aligned region of a spacial decomposition of volume data with various other regions. It uses the algorithm from Graphics Gems IV, page 81.<p>
<dl class="user" compact><dt><b>Caveat:</b></dt><dd>An instance of <a class="el" href="a01226.html" title="implicit function for convex set of planes">vtkPlanes</a> can be redefined by changing the planes, but this subclass then will not know if the region vertices are up to date. (Region vertices can be specified in SetRegionVertices or computed by the subclass.) So Delete and recreate if you want to change the set of planes. </dd></dl>
<p>Definition at line <a class="el" href="a04112.html#l00050">50</a> of file <a class="el" href="a04112.html">vtkPlanesIntersection.h</a>.</p>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#5bdf5a3865413bef89740119e5bc8b84">PrintSelf</a> (ostream &os, <a class="el" href="a00869.html">vtkIndent</a> indent)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#e9692756ed796416a48be5a71e98e995">SetRegionVertices</a> (<a class="el" href="a01250.html">vtkPoints</a> *pts)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#5dc4127ed6eb820c5db7369e8711a730">SetRegionVertices</a> (double *v, int nvertices)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#8c1456f01d0e5d530f1d941c84fe5a86">GetNumRegionVertices</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#2c44c96f85abc1a18adc3e3891d8b967">GetRegionVertices</a> (double *v, int nvertices)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#fcc1d28a3b52df1b293413a63b4712e0">IntersectsRegion</a> (<a class="el" href="a01250.html">vtkPoints</a> *R)</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="a01227.html">vtkPlanesIntersection</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#2e4d48920a333d1fd5ae1bcb9f7df5bd">New</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#22c4de844a3bcb79f99b700281bfa027">PolygonIntersectsBBox</a> (double bounds[6], <a class="el" href="a01250.html">vtkPoints</a> *pts)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a01227.html">vtkPlanesIntersection</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#033552956f1d848e20580b83387e3717">Convert3DCell</a> (<a class="el" href="a00240.html">vtkCell</a> *cell)</td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#daea8f4bc52bfe53e60c7dbf5454409a">vtkPlanesIntersection</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#7b430db29b8f7caebd34777f42da3938">~vtkPlanesIntersection</a> ()</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 void </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#6970755a5f78886d49ee88878898ea3a">ComputeNormal</a> (double *p1, double *p2, double *p3, double normal[3])</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#91713f0888e946244be38007989de6ea">EvaluatePlaneEquation</a> (double *x, double *p)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#f83e54d29e2098f60670f20626b66e79">PlaneEquation</a> (double *n, double *x, double *p)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#7162a45b46dbf7708607a6d10d9f94d6">GoodNormal</a> (double *n)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a01227.html#89d2f14f4897a16e3e034e853aceb783">Invert3x3</a> (double M[3][3])</td></tr>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="daea8f4bc52bfe53e60c7dbf5454409a"></a><!-- doxytag: member="vtkPlanesIntersection::vtkPlanesIntersection" ref="daea8f4bc52bfe53e60c7dbf5454409a" args="()" -->
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<td class="memname">vtkPlanesIntersection::vtkPlanesIntersection </td>
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<td><code> [protected]</code></td>
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<a class="anchor" name="7b430db29b8f7caebd34777f42da3938"></a><!-- doxytag: member="vtkPlanesIntersection::~vtkPlanesIntersection" ref="7b430db29b8f7caebd34777f42da3938" args="()" -->
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<td class="memname">vtkPlanesIntersection::~vtkPlanesIntersection </td>
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<td><code> [protected]</code></td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="5bdf5a3865413bef89740119e5bc8b84"></a><!-- doxytag: member="vtkPlanesIntersection::PrintSelf" ref="5bdf5a3865413bef89740119e5bc8b84" args="(ostream &os, vtkIndent indent)" -->
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<td class="memname">void vtkPlanesIntersection::PrintSelf </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="a01226.html#b000af1ddb3b4e15a902502a317ab9eb">vtkPlanes</a>.</p>
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<a class="anchor" name="2e4d48920a333d1fd5ae1bcb9f7df5bd"></a><!-- doxytag: member="vtkPlanesIntersection::New" ref="2e4d48920a333d1fd5ae1bcb9f7df5bd" args="()" -->
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<td class="memname">static <a class="el" href="a01227.html">vtkPlanesIntersection</a>* vtkPlanesIntersection::New </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="a01226.html#ce91c1ea68037dafa08157435e1676b9">vtkPlanes</a>.</p>
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<a class="anchor" name="e9692756ed796416a48be5a71e98e995"></a><!-- doxytag: member="vtkPlanesIntersection::SetRegionVertices" ref="e9692756ed796416a48be5a71e98e995" args="(vtkPoints *pts)" -->
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<td class="memname">void vtkPlanesIntersection::SetRegionVertices </td>
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It helps if you know the vertices of the convex region. If you don't, we will calculate them. Region vertices are 3-tuples.
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<a class="anchor" name="5dc4127ed6eb820c5db7369e8711a730"></a><!-- doxytag: member="vtkPlanesIntersection::SetRegionVertices" ref="5dc4127ed6eb820c5db7369e8711a730" args="(double *v, int nvertices)" -->
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<td class="memname">void vtkPlanesIntersection::SetRegionVertices </td>
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<a class="anchor" name="8c1456f01d0e5d530f1d941c84fe5a86"></a><!-- doxytag: member="vtkPlanesIntersection::GetNumRegionVertices" ref="8c1456f01d0e5d530f1d941c84fe5a86" args="()" -->
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<td class="memname">int vtkPlanesIntersection::GetNumRegionVertices </td>
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<a class="anchor" name="2c44c96f85abc1a18adc3e3891d8b967"></a><!-- doxytag: member="vtkPlanesIntersection::GetRegionVertices" ref="2c44c96f85abc1a18adc3e3891d8b967" args="(double *v, int nvertices)" -->
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<td class="memname">int vtkPlanesIntersection::GetRegionVertices </td>
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<a class="anchor" name="fcc1d28a3b52df1b293413a63b4712e0"></a><!-- doxytag: member="vtkPlanesIntersection::IntersectsRegion" ref="fcc1d28a3b52df1b293413a63b4712e0" args="(vtkPoints *R)" -->
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<td class="memname">int vtkPlanesIntersection::IntersectsRegion </td>
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Return 1 if the axis aligned box defined by R intersects the region defined by the planes, or 0 otherwise.
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<a class="anchor" name="22c4de844a3bcb79f99b700281bfa027"></a><!-- doxytag: member="vtkPlanesIntersection::PolygonIntersectsBBox" ref="22c4de844a3bcb79f99b700281bfa027" args="(double bounds[6], vtkPoints *pts)" -->
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<td class="memname">static int vtkPlanesIntersection::PolygonIntersectsBBox </td>
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A convenience function provided by this class, returns 1 if the polygon defined in pts intersects the bounding box defined in bounds, 0 otherwise. The points must define a planar polygon.
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<a class="anchor" name="033552956f1d848e20580b83387e3717"></a><!-- doxytag: member="vtkPlanesIntersection::Convert3DCell" ref="033552956f1d848e20580b83387e3717" args="(vtkCell *cell)" -->
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<td class="memname">static <a class="el" href="a01227.html">vtkPlanesIntersection</a>* vtkPlanesIntersection::Convert3DCell </td>
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Another convenience function provided by this class, returns the <a class="el" href="a01227.html" title="A vtkPlanesIntersection object is a vtkPlanes object that can compute whether the...">vtkPlanesIntersection</a> object representing a 3D cell. The point IDs for each <a class="el" href="a00012.html">face</a> must be given in counter-clockwise order from the outside of the cell.
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<a class="anchor" name="6970755a5f78886d49ee88878898ea3a"></a><!-- doxytag: member="vtkPlanesIntersection::ComputeNormal" ref="6970755a5f78886d49ee88878898ea3a" args="(double *p1, double *p2, double *p3, double normal[3])" -->
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<a class="anchor" name="91713f0888e946244be38007989de6ea"></a><!-- doxytag: member="vtkPlanesIntersection::EvaluatePlaneEquation" ref="91713f0888e946244be38007989de6ea" args="(double *x, double *p)" -->
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<td class="memname">static double vtkPlanesIntersection::EvaluatePlaneEquation </td>
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<a class="anchor" name="f83e54d29e2098f60670f20626b66e79"></a><!-- doxytag: member="vtkPlanesIntersection::PlaneEquation" ref="f83e54d29e2098f60670f20626b66e79" args="(double *n, double *x, double *p)" -->
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<td class="memname">static void vtkPlanesIntersection::PlaneEquation </td>
<td>(</td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>n</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>x</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>p</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [static, protected]</code></td>
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<p>
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<a class="anchor" name="7162a45b46dbf7708607a6d10d9f94d6"></a><!-- doxytag: member="vtkPlanesIntersection::GoodNormal" ref="7162a45b46dbf7708607a6d10d9f94d6" args="(double *n)" -->
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<td class="memname">static int vtkPlanesIntersection::GoodNormal </td>
<td>(</td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>n</em> </td>
<td> ) </td>
<td><code> [static, protected]</code></td>
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<p>
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<a class="anchor" name="89d2f14f4897a16e3e034e853aceb783"></a><!-- doxytag: member="vtkPlanesIntersection::Invert3x3" ref="89d2f14f4897a16e3e034e853aceb783" args="(double M[3][3])" -->
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<td class="memname">static int vtkPlanesIntersection::Invert3x3 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>M</em>[3][3] </td>
<td> ) </td>
<td><code> [static, protected]</code></td>
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<p>
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<hr>The documentation for this class was generated from the following file:<ul>
<li>dox/Filtering/<a class="el" href="a04112.html">vtkPlanesIntersection.h</a></ul>
</div>
<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 19:24:12 2009 for VTK by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
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