geometry/curves/exampleDSLSubsegment.cpp

Example of DSLSubsegment.

 

 
 

#include <iostream>
#include "ConfigExamples.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/base/Common.h"
 
#include <map>
#include "DGtal/geometry/curves/DSLSubsegment.h"
#include "DGtal/kernel/CPointPredicate.h"
#include "DGtal/arithmetic/IntegerComputer.h"
 
 
 
using namespace std;
using namespace DGtal;

 
int main( )
{
  trace.beginBlock ( "Example exampleDSLSubsegment" );
 
 
  typedef DGtal::int32_t Integer;
  typedef long double Number;
 
  // Define the DSLSubsegment: the first template parameter specifies
  // the type of integer used for computations, the second one is the
  // type of the input DSL characteristics (Integer in this case).
  typedef DGtal::DSLSubsegment<Integer,Integer> DSLSubseg;
 
  typedef DSLSubseg::Point Point;
 
  // Define the two endpoints of the subsegment
  Point A(1,5);
  Point B(6,9);
 
  // Compute the minimal characteristics of the subsegment [AB] of the
  // 8-connected DSL of characteristics (2,3,15). The algorithm using
  // the Farey fan is used in this case. If the string is set to
  // "localCH", the algorithm using local convex hull is used: the
  // result is the same but the computation time is a bit longer.
  DSLSubseg D1(2,3,15,A,B,"farey");
 
  // Display the result
  std::cout << "a=" << D1.getA() << " b=" << D1.getB() << " mu=" << D1.getMu() << std::endl;
 
  // Define a DSL subsegment with floating-point input
  // characteristics.
  typedef DGtal::DSLSubsegment<Integer,Number> DSLSubsegD;
 
  // Same as before, except that the last parameter is the precision used for
  // floating-point geometric predicates. The algorithm used is an
  // adaptation of the Farey fan algorithm for floating-point input data.
  DSLSubsegD D2(0.6666,5,A,B,0.00005);
 
  // Display the result
  std::cout << "a=" << D2.getA() << " b=" << D2.getB() << " mu=" << D2.getMu() << std::endl;
 
 
 
  trace.endBlock();
  return 0;
}
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