geometry/curves/estimation/exampleLMST3DBy2D.cpp

This example shows the basic usage of the Lambda maximal segment tangent estimation in 3D by the method using only 2D projections.

See also

Digital straight lines and segments

 
#include <iostream>
#include <iterator>
#include <vector>
#include "DGtal/base/Common.h"
#include "DGtal/base/BasicTypes.h"
#include "DGtal/helpers/StdDefs.h"
 
#include "DGtal/geometry/curves/estimation/LambdaMST3DBy2D.h"
 
 
using namespace std;
using namespace DGtal;
using namespace Z3i;
 
 
int main()
{
  typedef vector < Point > Container;
  typedef Container::const_iterator ConstIterator;
  LambdaMST3DBy2D < ConstIterator > lmst;
  
  // Input points
  Container contour;
  contour.push_back ( Point ( 18, 25, 18 ) );
  contour.push_back ( Point ( 17, 25, 19 ) );
  contour.push_back ( Point ( 16, 25, 20 ) );
  contour.push_back ( Point ( 15, 25, 21 ) );
  contour.push_back ( Point ( 14, 25, 22 ) );
  contour.push_back ( Point ( 13, 25, 23 ) );
  contour.push_back ( Point ( 12, 25, 24 ) );
  contour.push_back ( Point ( 11, 25, 25 ) );
  contour.push_back ( Point ( 10, 25, 26 ) );
  contour.push_back ( Point ( 9, 25, 27 ) );
  contour.push_back ( Point ( 8, 25, 28 ) );
 
  lmst.init ( contour.cbegin ( ), contour.cend ( ), LambdaMST3DBy2D < ConstIterator >::MAIN_AXIS::X ) ;
  for ( const auto & p : contour )
    trace.info ( ) << lmst.eval ( p ) << std::endl;
 
  lmst.init ( contour.cbegin ( ), contour.cend ( ), LambdaMST3DBy2D < ConstIterator >::MAIN_AXIS::X );
  vector < RealVector > tangent;
  lmst.eval ( contour.cbegin ( ), contour.cend ( ), back_insert_iterator < vector < RealVector > > ( tangent ) );
  for ( const auto & t : tangent )
    trace.info ( ) << t << std::endl;
  return 0;
}
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