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<h1>DataRepresentation/Mesh/RGBPointSet.cxx</h1><div class="fragment"><pre class="fragment"><span class="comment">/*=========================================================================</span>
<span class="comment"></span>
<span class="comment"> Program: Insight Segmentation & Registration Toolkit</span>
<span class="comment"> Module: $RCSfile: RGBPointSet.cxx,v $</span>
<span class="comment"> Language: C++</span>
<span class="comment"> Date: $Date: 2008-01-20 21:19:51 $</span>
<span class="comment"> Version: $Revision: 1.12 $</span>
<span class="comment"></span>
<span class="comment"> Copyright (c) Insight Software Consortium. All rights reserved.</span>
<span class="comment"> See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.</span>
<span class="comment"></span>
<span class="comment"> This software is distributed WITHOUT ANY WARRANTY; without even </span>
<span class="comment"> the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR </span>
<span class="comment"> PURPOSE. See the above copyright notices for more information.</span>
<span class="comment"></span>
<span class="comment">=========================================================================*/</span>
<span class="preprocessor">#if defined(_MSC_VER)</span>
<span class="preprocessor"></span><span class="preprocessor">#pragma warning ( disable : 4786 )</span>
<span class="preprocessor"></span><span class="preprocessor">#endif</span>
<span class="preprocessor"></span>
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// The following example illustrates how a point set can be parameterized to</span>
<span class="comment">// manage a particular pixel type. In this case, pixels of RGB type are used.</span>
<span class="comment">// The first step is then to include the header files of the</span>
<span class="comment">// \doxygen{RGBPixel} and \doxygen{PointSet} classes.</span>
<span class="comment">//</span>
<span class="comment">// \index{itk::PointSet!RGBPixel}</span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="comment">// Software Guide : BeginCodeSnippet</span>
<span class="preprocessor">#include "<a class="code" href="itkRGBPixel_8h.html">itkRGBPixel.h</a>"</span>
<span class="preprocessor">#include "<a class="code" href="itkPointSet_8h.html">itkPointSet.h</a>"</span>
<span class="comment">// Software Guide : EndCodeSnippet</span>
<span class="keywordtype">int</span> <a name="a0"></a><a class="code" href="itkTestMain_8h.html#dacbe0175a79dff748855d8c9839f82b">main</a>(<span class="keywordtype">int</span>, <span class="keywordtype">char</span> *[])
{
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// Then, the pixel type can be defined by selecting the type to be used to</span>
<span class="comment">// represent each one of the RGB components.</span>
<span class="comment">//</span>
<span class="comment">// \index{itk::RGBPixel!Instantiation}</span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="comment">// Software Guide : BeginCodeSnippet</span>
<span class="keyword">typedef</span> <a name="_a1"></a><a class="code" href="classitk_1_1RGBPixel.html">itk::RGBPixel< float ></a> PixelType;
<span class="comment">// Software Guide : EndCodeSnippet</span>
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// The newly defined pixel type is now used to instantiate the PointSet</span>
<span class="comment">// type and subsequently create a point set object.</span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="comment">// Software Guide : BeginCodeSnippet</span>
<span class="keyword">typedef</span> <a name="_a2"></a><a class="code" href="classitk_1_1PointSet.html" title="A superclass of the N-dimensional mesh structure; supports point (geometric coordinate...">itk::PointSet< PixelType, 3 ></a> PointSetType;
<a name="a3"></a><a class="code" href="itkFEMMacro_8h.html#539cce1a3282ba59952dedcbf9cdb23f">PointSetType::Pointer</a> pointSet = <a name="a4"></a><a class="code" href="namespaceHardConnectedComponentImageFilter.html#870262f145e0b45206db74df8053b59c">PointSetType::New</a>();
<span class="comment">// Software Guide : EndCodeSnippet</span>
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// The following code is generating a sphere and assigning RGB values to</span>
<span class="comment">// the points. The components of the RGB values in this example are</span>
<span class="comment">// computed to represent the position of the points.</span>
<span class="comment">//</span>
<span class="comment">// \index{itk::PointSet!SetPoint()}</span>
<span class="comment">// \index{itk::PointSet!SetPointData()}</span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="comment">// Software Guide : BeginCodeSnippet</span>
PointSetType::PixelType pixel;
PointSetType::PointType point;
<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> pointId = 0;
<span class="keyword">const</span> <span class="keywordtype">double</span> radius = 3.0;
<span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<360; i++)
{
<span class="keyword">const</span> <span class="keywordtype">double</span> angle = i * atan(1.0) / 45.0;
point[0] = radius * sin( angle );
point[1] = radius * cos( angle );
point[2] = 1.0;
pixel.SetRed( point[0] * 2.0 );
pixel.SetGreen( point[1] * 2.0 );
pixel.SetBlue( point[2] * 2.0 );
pointSet->SetPoint( pointId, point );
pointSet->SetPointData( pointId, pixel );
pointId++;
}
<span class="comment">// Software Guide : EndCodeSnippet</span>
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// All the points on the PointSet are visited using the following code.</span>
<span class="comment">//</span>
<span class="comment">// \index{itk::PointSet!GetPoints()}</span>
<span class="comment">// \index{itk::PointSet!points iterator}</span>
<span class="comment">// \index{itk::PointSet!iterating points}</span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="comment">// Software Guide : BeginCodeSnippet</span>
<span class="keyword">typedef</span> PointSetType::PointsContainer::ConstIterator PointIterator;
PointIterator pointIterator = pointSet->GetPoints()->Begin();
PointIterator pointEnd = pointSet->GetPoints()->End();
<span class="keywordflow">while</span>( pointIterator != pointEnd )
{
point = pointIterator.Value();
std::cout << point << std::endl;
++pointIterator;
}
<span class="comment">// Software Guide : EndCodeSnippet</span>
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// Note that here the \code{ConstIterator} was used instead of the</span>
<span class="comment">// \code{Iterator} since the pixel values are not expected to be modified.</span>
<span class="comment">// ITK supports const-correctness at the API level. </span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// All the pixel values on the PointSet are visited using the following code.</span>
<span class="comment">//</span>
<span class="comment">// \index{itk::PointSet!GetPointData()}</span>
<span class="comment">// \index{itk::PointSet!data iterator}</span>
<span class="comment">// \index{itk::PointSet!iterating point data}</span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="comment">// Software Guide : BeginCodeSnippet</span>
<span class="keyword">typedef</span> PointSetType::PointDataContainer::ConstIterator PointDataIterator;
PointDataIterator pixelIterator = pointSet->GetPointData()->Begin();
PointDataIterator pixelEnd = pointSet->GetPointData()->End();
<span class="keywordflow">while</span>( pixelIterator != pixelEnd )
{
pixel = pixelIterator.Value();
std::cout << pixel << std::endl;
++pixelIterator;
}
<span class="comment">// Software Guide : EndCodeSnippet</span>
<span class="comment">// Software Guide : BeginLatex</span>
<span class="comment">//</span>
<span class="comment">// Again, please note the use of the \code{ConstIterator} instead of the</span>
<span class="comment">// \code{Iterator}. </span>
<span class="comment">//</span>
<span class="comment">// \index{ConstIterator}</span>
<span class="comment">// \index{const-correctness}</span>
<span class="comment">//</span>
<span class="comment">// Software Guide : EndLatex </span>
<span class="keywordflow">return</span> 0;
}
</pre></div> </div>
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