testAstroid2D.cpp File Reference

#include <iostream>
#include <random>
#include "DGtalCatch.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/shapes/parametric/Astroid2D.h"

Include dependency graph for testAstroid2D.cpp:

Go to the source code of this file.

Typedefs
typedef Astroid2D< Space >	Shape

Functions
double	notNullValue (std::uniform_real_distribution< double > &unif, std::default_random_engine &re)
RealPoint	notNullRealPoint (std::uniform_real_distribution< double > &unif, std::default_random_engine &re)
	TEST_CASE ("Astroid2D")

Detailed Description

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Author

Adrien Krähenbühl (krahe.nosp@m.nbuh.nosp@m.l@uni.nosp@m.stra.nosp@m..fr ) Laboratoire ICube, UMR 7357, Université de Strasbourg, France

Date

2019/07/18

Functions for testing the methods of the Astroid2D shape. In particular, test the parameter() method for cas leadind to a division by 0.

This file is part of the DGtal library.

Definition in file testAstroid2D.cpp.

Typedef Documentation

Shape

typedef Astroid2D<Space> Shape

Examples

tutorial-examples/AreaSurfaceEstimation-final.cpp.

Definition at line 45 of file testAstroid2D.cpp.

Function Documentation

notNullRealPoint()

RealPoint notNullRealPoint	(	std::uniform_real_distribution< double > &	unif,
		std::default_random_engine &	re )

Definition at line 59 of file testAstroid2D.cpp.

{
  return RealPoint(notNullValue(unif,re),notNullValue(unif,re));
}

References notNullValue().

Referenced by TEST_CASE().

notNullValue()

double notNullValue	(	std::uniform_real_distribution< double > &	unif,
		std::default_random_engine &	re )

Definition at line 47 of file testAstroid2D.cpp.

{
  double res;
  do {
    res = unif(re);
  }
  while ( res == Approx(0.) );
  return res;
}

Referenced by notNullRealPoint(), and TEST_CASE().

TEST_CASE()

TEST_CASE

(

"Astroid2D"

)

Definition at line 66 of file testAstroid2D.cpp.

{
  std::uniform_real_distribution<double> unif(-10000,10000);
  std::default_random_engine re;
 
  SECTION("center()")
    {
      const RealPoint center(unif(re),unif(re));
      Shape shape( center, unif(re), unif(re) );
           REQUIRE( shape.center() == center );
        }
  
  SECTION("Lower and upper bounds")
    {
      Shape shape( unif(re), unif(re), unif(re), unif(re) );
      REQUIRE( shape.getLowerBound() <= shape.getUpperBound() );
    }
 
  SECTION("parameter() with null x-radius -> division by 0.")
    {
          Shape shape( unif(re), unif(re), 0., notNullValue(unif,re) );
      REQUIRE_NOTHROW( shape.parameter(notNullRealPoint(unif,re)) );
    }
 
  SECTION("parameter() with null y-radius -> division by 0.")
    {
          Shape shape( unif(re), unif(re), notNullValue(unif,re), 0. );
      REQUIRE_NOTHROW( shape.parameter(notNullRealPoint(unif,re)) );
    }
 
  SECTION("parameter() with null x-radius and y-radius -> undefined behaviour.")
    {
          Shape shape( unif(re), unif(re), 0., 0. );
      REQUIRE_NOTHROW( shape.parameter(notNullRealPoint(unif,re)) );
    }
 
  SECTION("parameter() where (x,y) parameter with x == center -> pi/2 or 3*pi/2")
    {
      const double centerX = unif(re);
          Shape shape( centerX, unif(re), unif(re), unif(re) );
            const RealPoint point( centerX, unif(re) );
      REQUIRE_NOTHROW( shape.parameter(point) );
      double res = shape.parameter(point);
      REQUIRE_THAT( res, Catch::WithinAbs(M_PI_2,DBL_EPSILON) || Catch::WithinAbs(3*M_PI_2,DBL_EPSILON) );
    }
 
  SECTION("parameter() with point parameter with null y -> 0. or pi")
    {
      const double centerY = unif(re);
          Shape shape( unif(re), centerY, unif(re), unif(re) );
            const RealPoint point( unif(re), centerY );
      REQUIRE_NOTHROW( shape.parameter(point) );
      double res = shape.parameter(point);
      REQUIRE_THAT( res, Catch::WithinAbs(0.,DBL_EPSILON) || Catch::WithinAbs(M_PI,DBL_EPSILON) );
    }
}

References DGtal::Astroid2D< TSpace >::center(), DGtal::Astroid2D< TSpace >::getLowerBound(), DGtal::Astroid2D< TSpace >::getUpperBound(), notNullRealPoint(), notNullValue(), DGtal::Astroid2D< TSpace >::parameter(), REQUIRE(), and SECTION().