testLpMetric.cpp

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#include <iostream>
#include "DGtal/base/Common.h"
#include "ConfigTest.h"
#include "DGtalCatch.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/geometry/volumes/distance/LpMetric.h"
#include "DGtal/geometry/volumes/distance/CMetricSpace.h"
 
using namespace std;
using namespace DGtal;
 
// Functions for testing class LpMetric.
TEST_CASE( "Testing LpMetric" )
{
  
  BOOST_CONCEPT_ASSERT(( concepts::CMetricSpace<LpMetric<Z2i::Space>> ));
 
  LpMetric<Z2i::Space> l2_2D(2.0);
  LpMetric<Z3i::Space> l2_3D(2.0);
  LpMetric<Z2i::Space> l55_2D(5.5);
  Z2i::Space::RealPoint a(0,0), b(1.0,1.0), c(0.5,0.5);
  Z3i::Space::RealPoint aa(0,0,0), bb(1.0,1.0,1.0);
  
  SECTION("Testing LpMetric distance values")
    {
      CAPTURE( l55_2D) ;
      REQUIRE( l2_2D.rawDistance(a,b) == Approx(2.0) );
      REQUIRE( l2_3D.rawDistance(aa,bb) == Approx(3.0) );
      REQUIRE( l2_2D(a,b) == Approx(std::sqrt(2.0)) );
      REQUIRE( l55_2D(a,b) == Approx(1.1343125) );
      REQUIRE( l2_2D.closest(a,c,b) == DGtal::ClosestFIRST );
      REQUIRE( l2_2D.closest(c,a,b) == DGtal::ClosestBOTH );
    }
}