ENH: Adding example for point set reader

Examples/IO/CMakeLists.txt

@@ -61,6 +61,9 @@ TARGET_LINK_LIBRARIES(DEMToImageGenerator OTBProjections OTBIO OTBCommon ITKComm
 ADD_EXECUTABLE(DEMToOrthoImageGenerator DEMToOrthoImageGenerator.cxx )
 TARGET_LINK_LIBRARIES(DEMToOrthoImageGenerator OTBProjections OTBIO OTBCommon ITKCommon ITKIO otbossim )
 
+ADD_EXECUTABLE(LidarReaderExample LidarReaderExample.cxx )
+TARGET_LINK_LIBRARIES(LidarReaderExample OTBIO OTBCommon ITKCommon ITKIO otbossim )
+
 IF(ITK_USE_REVIEW)
   ADD_EXECUTABLE(LidarToImageExample LidarToImageExample.cxx )
   TARGET_LINK_LIBRARIES(LidarToImageExample OTBIO OTBCommon ITKCommon ITKIO otbossim )

Examples/IO/LidarReaderExample.cxx

+/*=========================================================================
+
+  Program:   ORFEO Toolbox
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
+  See OTBCopyright.txt for details.
+
+
+     This software is distributed WITHOUT ANY WARRANTY; without even 
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+
+//  Software Guide : BeginCommandLineArgs
+//    INPUTS: {srs.las}
+//  Software Guide : EndCommandLineArgs
+
+
+// Software Guide : BeginLatex
+//
+// This example describes how to read a lidar data file and to display the basic
+// information about it. Here, OTB make use of libLAS.
+//
+// The first step toward the use of these filters is to include the proper header files.
+//
+// Software Guide : EndLatex
+
+// Software Guide : BeginCodeSnippet
+#include "otbPointSetFileReader.h"
+#include "itkPointSet.h"
+#include <fstream>
+int main(int argc, char * argv[])
+{
+// Software Guide : EndCodeSnippet
+
+// Software Guide : BeginLatex
+//
+// We need now to declare the data types that we will be using and instanciate the 
+// reader (which is a \doxygen{otb}{PointSetFileReader}).
+//
+// Software Guide : EndLatex
+
+// Software Guide : BeginCodeSnippet
+  typedef itk::PointSet <double, 2> PointSetType;
+  typedef otb::PointSetFileReader<PointSetType> PointSetFileReaderType;
+  PointSetFileReaderType::Pointer reader = PointSetFileReaderType::New();
+
+  reader->SetFileName(argv[1]);
+  reader->Update();
+// Software Guide : EndCodeSnippet
+  
+// Software Guide : BeginLatex
+//
+// We can already display some interesting information such as the 
+// data extension and the number of points:
+//
+// Software Guide : EndLatex
+  
+  // Software Guide : BeginCodeSnippet
+  std::cout << "*** Data area *** " << std::endl;
+  std::cout << std::setprecision(15);
+  std::cout << " - Easting min:  " << reader->GetMinX() << std::endl;
+  std::cout << " - Easting max:  " << reader->GetMaxX() << std::endl;
+  std::cout << " - Northing min: " << reader->GetMinY() << std::endl;
+  std::cout << " - Northing max: " << reader->GetMaxY() << std::endl;
+  std::cout << "Data points: " << reader->GetNumberOfPoints() << std::endl;
+  // Software Guide : EndCodeSnippet
+  
+  
+  // Software Guide : BeginLatex
+//
+// We can also loop on the point to see each point with its coordinates and 
+// value. Be careful here, data set can have hundred of thousands of points:
+//
+// Software Guide : EndLatex
+  
+  // Software Guide : BeginCodeSnippet
+  PointSetType::Pointer data = reader->GetOutput();
+  
+  unsigned long nPoints = data->GetNumberOfPoints();
+  
+  for(unsigned long i=0; i < nPoints; ++i)
+  {
+    PointSetType::PointType point;
+    data->GetPoint(i,&point);
+    std::cout << point << " : ";
+    PointSetType::PixelType value;
+    data->GetPointData(i,&value);
+    std::cout << value << std::endl;
+  }
+
+  return EXIT_SUCCESS;
+}
+// Software Guide : EndCodeSnippet
+
+