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<h1>vtkGeometricErrorMetric Class Reference</h1><!-- doxytag: class="vtkGeometricErrorMetric" --><!-- doxytag: inherits="vtkGenericSubdivisionErrorMetric" --><code>#include <<a class="el" href="a04052.html">vtkGeometricErrorMetric.h</a>></code>
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Inheritance diagram for vtkGeometricErrorMetric:</div>
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Collaboration diagram for vtkGeometricErrorMetric:</div>
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<p>
<a href="a10219.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
Objects that compute geometry-based error during cell tessellation.
<p>
It is a concrete error metric, based on a geometric criterium: the variation of the edge from a straight line.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="a00584.html" title="helper class to perform cell tessellation">vtkGenericCellTessellator</a> <a class="el" href="a00607.html" title="Objects that compute error during cell tessellation.">vtkGenericSubdivisionErrorMetric</a></dd></dl>
<dl class="user" compact><dt><b>Tests:</b></dt><dd><a class="el" href="c2_vtk_t_6.html#c2_vtk_t_vtkGeometricErrorMetric">vtkGeometricErrorMetric (Tests)</a> </dd></dl>
<p>Definition at line <a class="el" href="a04052.html#l00037">37</a> of file <a class="el" href="a04052.html">vtkGeometricErrorMetric.h</a>.</p>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <br>
<a class="el" href="a00607.html">vtkGenericSubdivisionErrorMetric</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#e1c190641b855566e63f03adfd36b214">Superclass</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#96ec781627f51222981886f90ea877c6">IsTypeOf</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00627.html">vtkGeometricErrorMetric</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#958aa32c80e2cdd73b8bdde9241ee860">SafeDownCast</a> (<a class="el" href="a01084.html">vtkObject</a> *o)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#538dc7f1538ed3601c726c4992f882dd">GetClassName</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#4f4862783287ee3954c714bfbc3b7565">IsA</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#f356b41323ba3b37064b05caee3298d1">PrintSelf</a> (ostream &os, <a class="el" href="a00869.html">vtkIndent</a> indent)</td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#6ccdfc6fbdc91a1b3c06b9b7bac98d86">SetAbsoluteGeometricTolerance</a> (double value)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#318082c9d9a83076425e897186f4dec4">GetRelative</a> ()</td></tr>
<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#658de55aa932d25b4dbea738f9d6dd61">GetAbsoluteGeometricTolerance</a> ()</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#0443b39450bc25eedbcc6032b4f07879">SetRelativeGeometricTolerance</a> (double value, <a class="el" href="a00590.html">vtkGenericDataSet</a> *ds)</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#1aba72cc59f393f60e5b43ba43970f98">RequiresEdgeSubdivision</a> (double *leftPoint, double *midPoint, double *rightPoint, double alpha)</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#1d81d9595261b90d37ad727a5bae556a">GetError</a> (double *leftPoint, double *midPoint, double *rightPoint, double alpha)</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="a00627.html">vtkGeometricErrorMetric</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#6c3a0a1b1ce922356cbacb9f864e46d0">New</a> ()</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="a00627.html#9a834d236b8f18b4f71628572e1b626f">vtkGeometricErrorMetric</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#5060dab0e4f6bfa44fa2187417a58795">~vtkGeometricErrorMetric</a> ()</td></tr>
<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#707eca0d3d909007b9c2aa4ff4c192e5">Distance2LinePoint</a> (double x[3], double y[3], double z[3])</td></tr>
<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#9791da7df0f15ca6507eb28a5ee2e4b1">AbsoluteGeometricTolerance</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#4d4a0ff0a237b4a98cc199705ac242af">SmallestSize</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00627.html#a47c1d2b5312235d98e67ad1d5609feb">Relative</a></td></tr>
</table>
<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="e1c190641b855566e63f03adfd36b214"></a><!-- doxytag: member="vtkGeometricErrorMetric::Superclass" ref="e1c190641b855566e63f03adfd36b214" args="" -->
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<td class="memname">typedef <a class="el" href="a00607.html">vtkGenericSubdivisionErrorMetric</a> <a class="el" href="a00607.html">vtkGeometricErrorMetric::Superclass</a> </td>
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<p>
Standard VTK type and error macros.
<p>Reimplemented from <a class="el" href="a00607.html#a0b2ec014b9569164b5b24799417920e">vtkGenericSubdivisionErrorMetric</a>.</p>
<p>Definition at line <a class="el" href="a04052.html#l00046">46</a> of file <a class="el" href="a04052.html">vtkGeometricErrorMetric.h</a>.</p>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="9a834d236b8f18b4f71628572e1b626f"></a><!-- doxytag: member="vtkGeometricErrorMetric::vtkGeometricErrorMetric" ref="9a834d236b8f18b4f71628572e1b626f" args="()" -->
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<td class="memname">vtkGeometricErrorMetric::vtkGeometricErrorMetric </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [protected]</code></td>
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<p>
</div>
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<a class="anchor" name="5060dab0e4f6bfa44fa2187417a58795"></a><!-- doxytag: member="vtkGeometricErrorMetric::~vtkGeometricErrorMetric" ref="5060dab0e4f6bfa44fa2187417a58795" args="()" -->
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<td class="memname">virtual vtkGeometricErrorMetric::~vtkGeometricErrorMetric </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [protected, virtual]</code></td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="6c3a0a1b1ce922356cbacb9f864e46d0"></a><!-- doxytag: member="vtkGeometricErrorMetric::New" ref="6c3a0a1b1ce922356cbacb9f864e46d0" args="()" -->
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<td class="memname">static <a class="el" href="a00627.html">vtkGeometricErrorMetric</a>* vtkGeometricErrorMetric::New </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>
Construct the error metric with a default squared absolute geometric accuracy equal to 1.
<p>Reimplemented from <a class="el" href="a01084.html#4d5b227267c076d6f9e38483370b6612">vtkObject</a>.</p>
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<a class="anchor" name="538dc7f1538ed3601c726c4992f882dd"></a><!-- doxytag: member="vtkGeometricErrorMetric::GetClassName" ref="538dc7f1538ed3601c726c4992f882dd" args="()" -->
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<td class="memname">virtual const char* vtkGeometricErrorMetric::GetClassName </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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</div>
<div class="memdoc">
<p>
Standard VTK type and error macros.
<p>Reimplemented from <a class="el" href="a00607.html#0b9df77911ca43eeb0714fb1b4daf85b">vtkGenericSubdivisionErrorMetric</a>.</p>
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<a class="anchor" name="96ec781627f51222981886f90ea877c6"></a><!-- doxytag: member="vtkGeometricErrorMetric::IsTypeOf" ref="96ec781627f51222981886f90ea877c6" args="(const char *type)" -->
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<td class="memname">static int vtkGeometricErrorMetric::IsTypeOf </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>type</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<div class="memdoc">
<p>
Standard VTK type and error macros.
<p>Reimplemented from <a class="el" href="a00607.html#df5f1a0f09465ab24f7b7839ffc707ce">vtkGenericSubdivisionErrorMetric</a>.</p>
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<a class="anchor" name="4f4862783287ee3954c714bfbc3b7565"></a><!-- doxytag: member="vtkGeometricErrorMetric::IsA" ref="4f4862783287ee3954c714bfbc3b7565" args="(const char *type)" -->
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<td class="memname">virtual int vtkGeometricErrorMetric::IsA </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>type</em> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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<div class="memdoc">
<p>
Standard VTK type and error macros.
<p>Reimplemented from <a class="el" href="a00607.html#938a91c7c0a3e9b9f95b452eea241d95">vtkGenericSubdivisionErrorMetric</a>.</p>
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<a class="anchor" name="958aa32c80e2cdd73b8bdde9241ee860"></a><!-- doxytag: member="vtkGeometricErrorMetric::SafeDownCast" ref="958aa32c80e2cdd73b8bdde9241ee860" args="(vtkObject *o)" -->
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<td class="memname">static <a class="el" href="a00627.html">vtkGeometricErrorMetric</a>* vtkGeometricErrorMetric::SafeDownCast </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a01084.html">vtkObject</a> * </td>
<td class="paramname"> <em>o</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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</div>
<div class="memdoc">
<p>
Standard VTK type and error macros.
<p>Reimplemented from <a class="el" href="a00607.html#92adca7e599b317994fff3754d11fac1">vtkGenericSubdivisionErrorMetric</a>.</p>
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<a class="anchor" name="f356b41323ba3b37064b05caee3298d1"></a><!-- doxytag: member="vtkGeometricErrorMetric::PrintSelf" ref="f356b41323ba3b37064b05caee3298d1" args="(ostream &os, vtkIndent indent)" -->
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<td class="memname">void vtkGeometricErrorMetric::PrintSelf </td>
<td>(</td>
<td class="paramtype">ostream & </td>
<td class="paramname"> <em>os</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="a00869.html">vtkIndent</a> </td>
<td class="paramname"> <em>indent</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [virtual]</code></td>
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<p>
Standard VTK type and error macros.
<p>Reimplemented from <a class="el" href="a00607.html#e12923231878439ccf130d2c0b3344cb">vtkGenericSubdivisionErrorMetric</a>.</p>
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<a class="anchor" name="658de55aa932d25b4dbea738f9d6dd61"></a><!-- doxytag: member="vtkGeometricErrorMetric::GetAbsoluteGeometricTolerance" ref="658de55aa932d25b4dbea738f9d6dd61" args="()" -->
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<td class="memname">virtual double vtkGeometricErrorMetric::GetAbsoluteGeometricTolerance </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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Return the squared absolute geometric accuracy. See <a class="el" href="a00627.html#6ccdfc6fbdc91a1b3c06b9b7bac98d86">SetAbsoluteGeometricTolerance()</a> for details. <dl class="post" compact><dt><b>Postcondition:</b></dt><dd>positive_result: result>0 </dd></dl>
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<a class="anchor" name="6ccdfc6fbdc91a1b3c06b9b7bac98d86"></a><!-- doxytag: member="vtkGeometricErrorMetric::SetAbsoluteGeometricTolerance" ref="6ccdfc6fbdc91a1b3c06b9b7bac98d86" args="(double value)" -->
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<td class="memname">void vtkGeometricErrorMetric::SetAbsoluteGeometricTolerance </td>
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Set the geometric accuracy with a squared absolute value. This is the geometric object-based accuracy. Subdivision will be required if the square distance between the real point and the straight line passing through the vertices of the edge is greater than `value'. For instance 0.01 will give better result than 0.1. <dl class="pre" compact><dt><b>Precondition:</b></dt><dd>positive_value: value>0 </dd></dl>
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<a class="anchor" name="0443b39450bc25eedbcc6032b4f07879"></a><!-- doxytag: member="vtkGeometricErrorMetric::SetRelativeGeometricTolerance" ref="0443b39450bc25eedbcc6032b4f07879" args="(double value, vtkGenericDataSet *ds)" -->
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<td class="memname">void vtkGeometricErrorMetric::SetRelativeGeometricTolerance </td>
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Set the geometric accuracy with a value relative to the length of the bounding box of the dataset. Internally compute the absolute tolerance. For instance 0.01 will give better result than 0.1. <dl class="pre" compact><dt><b>Precondition:</b></dt><dd>valid_range_value: value>0 && value<1 <p>
ds_exists: ds!=0 </dd></dl>
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<a class="anchor" name="1aba72cc59f393f60e5b43ba43970f98"></a><!-- doxytag: member="vtkGeometricErrorMetric::RequiresEdgeSubdivision" ref="1aba72cc59f393f60e5b43ba43970f98" args="(double *leftPoint, double *midPoint, double *rightPoint, double alpha)" -->
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<td class="memname">int vtkGeometricErrorMetric::RequiresEdgeSubdivision </td>
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<td class="paramtype">double * </td>
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Does the edge need to be subdivided according to the distance between the line passing through its endpoints and the mid point? The edge is defined by its `leftPoint' and its `rightPoint'. `leftPoint', `midPoint' and `rightPoint' have to be initialized before calling <a class="el" href="a00627.html#1aba72cc59f393f60e5b43ba43970f98">RequiresEdgeSubdivision()</a>. Their format is global coordinates, parametric coordinates and point centered attributes: xyx rst abc de... `alpha' is the normalized abscissa of the midpoint along the edge. (close to 0 means close to the left point, close to 1 means close to the right point) <dl class="pre" compact><dt><b>Precondition:</b></dt><dd>leftPoint_exists: leftPoint!=0 <p>
midPoint_exists: midPoint!=0 <p>
rightPoint_exists: rightPoint!=0 <p>
clamped_alpha: alpha>0 && alpha<1 <p>
valid_size: sizeof(leftPoint)=sizeof(midPoint)=sizeof(rightPoint) =GetAttributeCollection()->GetNumberOfPointCenteredComponents()+6 </dd></dl>
<p>Implements <a class="el" href="a00607.html#6eda4e9fc072d7f94e2746bcc36c545a">vtkGenericSubdivisionErrorMetric</a>.</p>
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<a class="anchor" name="1d81d9595261b90d37ad727a5bae556a"></a><!-- doxytag: member="vtkGeometricErrorMetric::GetError" ref="1d81d9595261b90d37ad727a5bae556a" args="(double *leftPoint, double *midPoint, double *rightPoint, double alpha)" -->
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<td class="memname">double vtkGeometricErrorMetric::GetError </td>
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<td class="paramtype">double </td>
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Return the error at the mid-point. It will return an error relative to the bounding box size if <a class="el" href="a00627.html#318082c9d9a83076425e897186f4dec4">GetRelative()</a> is true, a square absolute error otherwise. See <a class="el" href="a00627.html#1aba72cc59f393f60e5b43ba43970f98">RequiresEdgeSubdivision()</a> for a description of the arguments. <dl class="pre" compact><dt><b>Precondition:</b></dt><dd>leftPoint_exists: leftPoint!=0 <p>
midPoint_exists: midPoint!=0 <p>
rightPoint_exists: rightPoint!=0 <p>
clamped_alpha: alpha>0 && alpha<1 <p>
valid_size: sizeof(leftPoint)=sizeof(midPoint)=sizeof(rightPoint) =GetAttributeCollection()->GetNumberOfPointCenteredComponents()+6 </dd></dl>
<dl class="post" compact><dt><b>Postcondition:</b></dt><dd>positive_result: result>=0 </dd></dl>
<p>Implements <a class="el" href="a00607.html#07919cd89a86d00d25d6f31e9fccc5d2">vtkGenericSubdivisionErrorMetric</a>.</p>
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<a class="anchor" name="318082c9d9a83076425e897186f4dec4"></a><!-- doxytag: member="vtkGeometricErrorMetric::GetRelative" ref="318082c9d9a83076425e897186f4dec4" args="()" -->
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<td class="memname">int vtkGeometricErrorMetric::GetRelative </td>
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Return the type of output of <a class="el" href="a00627.html#1d81d9595261b90d37ad727a5bae556a">GetError()</a>
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<a class="anchor" name="707eca0d3d909007b9c2aa4ff4c192e5"></a><!-- doxytag: member="vtkGeometricErrorMetric::Distance2LinePoint" ref="707eca0d3d909007b9c2aa4ff4c192e5" args="(double x[3], double y[3], double z[3])" -->
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<td class="memname">double vtkGeometricErrorMetric::Distance2LinePoint </td>
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Square distance between a straight line (defined by points x and y) and a point z. Property: if x and y are equal, the line is a point and the result is the square distance between points x and z.
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<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="9791da7df0f15ca6507eb28a5ee2e4b1"></a><!-- doxytag: member="vtkGeometricErrorMetric::AbsoluteGeometricTolerance" ref="9791da7df0f15ca6507eb28a5ee2e4b1" args="" -->
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<td class="memname">double <a class="el" href="a00627.html#9791da7df0f15ca6507eb28a5ee2e4b1">vtkGeometricErrorMetric::AbsoluteGeometricTolerance</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04052.html#l00122">122</a> of file <a class="el" href="a04052.html">vtkGeometricErrorMetric.h</a>.</p>
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<a class="anchor" name="4d4a0ff0a237b4a98cc199705ac242af"></a><!-- doxytag: member="vtkGeometricErrorMetric::SmallestSize" ref="4d4a0ff0a237b4a98cc199705ac242af" args="" -->
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<td class="memname">double <a class="el" href="a00627.html#4d4a0ff0a237b4a98cc199705ac242af">vtkGeometricErrorMetric::SmallestSize</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04052.html#l00123">123</a> of file <a class="el" href="a04052.html">vtkGeometricErrorMetric.h</a>.</p>
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<a class="anchor" name="a47c1d2b5312235d98e67ad1d5609feb"></a><!-- doxytag: member="vtkGeometricErrorMetric::Relative" ref="a47c1d2b5312235d98e67ad1d5609feb" args="" -->
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<td class="memname">int <a class="el" href="a00627.html#a47c1d2b5312235d98e67ad1d5609feb">vtkGeometricErrorMetric::Relative</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04052.html#l00124">124</a> of file <a class="el" href="a04052.html">vtkGeometricErrorMetric.h</a>.</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="a04052.html">vtkGeometricErrorMetric.h</a></ul>
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<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 19:05:22 2009 for VTK by
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