DGtal  1.5.beta
testLemniscate2D.cpp
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1 
33 #include <iostream>
34 #include <random>
35 #include "DGtalCatch.h"
36 #include "DGtal/helpers/StdDefs.h"
37 #include "DGtal/shapes/parametric/Lemniscate2D.h"
38 
40 
41 using namespace DGtal;
42 using namespace Z2i;
43 
45 
46 double notNullValue(
47  std::uniform_real_distribution<double>& unif,
48  std::default_random_engine& re )
49 {
50  double res;
51  do {
52  res = unif(re);
53  }
54  while ( res == Approx(0.) );
55  return res;
56 }
57 
59  std::uniform_real_distribution<double>& unif,
60  std::default_random_engine& re )
61 {
62  return RealPoint(notNullValue(unif,re),notNullValue(unif,re));
63 }
64 
65 TEST_CASE("Lemniscate2D")
66 {
67  std::uniform_real_distribution<double> unif(-10000,10000);
68  std::default_random_engine re;
69 
70  SECTION("center()")
71  {
72  const RealPoint center(unif(re),unif(re));
73  Shape shape( center, unif(re) );
74  REQUIRE( shape.center() == center );
75  }
76 
77  SECTION("Lower and upper bounds")
78  {
79  Shape shape( unif(re), unif(re), unif(re) );
80  REQUIRE( shape.getLowerBound() <= shape.getUpperBound() );
81  }
82 
83  SECTION("x() with Pi parameter.")
84  {
85  Shape shape( unif(re), unif(re), unif(re) );
86  REQUIRE_NOTHROW( shape.x(M_PI) );
87  }
88 
89  SECTION("x() with Pi parameter -> division by 0.")
90  {
91  Shape shape( unif(re), unif(re), unif(re) );
92  REQUIRE_NOTHROW( shape.x(M_PI) );
93  }
94 
95  SECTION("xp() with Pi parameter -> division by 0.")
96  {
97  Shape shape( unif(re), unif(re), unif(re) );
98  REQUIRE_NOTHROW( shape.xp(M_PI) );
99  }
100 
101  SECTION("xpp() with Pi parameter -> division by 0.")
102  {
103  Shape shape( unif(re), unif(re), unif(re) );
104  REQUIRE_NOTHROW( shape.xp(M_PI) );
105  }
106 }
RealPoint getLowerBound() const
Definition: Astroid2D.h:122
RealPoint x(const double t) const
RealVector xp(const double t) const
RealPoint center() const
Definition: Astroid2D.h:139
RealPoint getUpperBound() const
Definition: Astroid2D.h:131
Aim: Model of the concept StarShaped represents a lemniscate.
Definition: Lemniscate2D.h:62
Aim: Implements basic operations that will be used in Point and Vector classes.
Definition: PointVector.h:593
Space::RealPoint RealPoint
Definition: StdDefs.h:97
DGtal is the top-level namespace which contains all DGtal functions and types.
TEST_CASE("Lemniscate2D")
RealPoint notNullRealPoint(std::uniform_real_distribution< double > &unif, std::default_random_engine &re)
double notNullValue(std::uniform_real_distribution< double > &unif, std::default_random_engine &re)
Lemniscate2D< Space > Shape
SECTION("Testing constant forward iterators")
REQUIRE(domain.isInside(aPoint))